Journal articles on the topic 'Three-dimensional printing – Automatic control'
To see the other types of publications on this topic, follow the link: Three-dimensional printing – Automatic control.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Three-dimensional printing – Automatic control.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Ren, Hongwei, Yongchao Luan, Xingkun Dong, Haijun Zhou, Xin Chen, and Xiaochuan Yu. "Design of Automatic Controller System for Three Axis 3D Printing Platform." Journal of Physics: Conference Series 2095, no. 1 (November 1, 2021): 012050. http://dx.doi.org/10.1088/1742-6596/2095/1/012050.
Full textAbstract:
Abstract With the development of society and the continuous improvement of the level of automation, automatic three-dimensional work platform is more and more popular, but now the three-dimensional work platform has a single function, and the waste of capacity is a serious problem. Therefore, this paper uses STM32F429 MCU to design a set of replaceable working position of the three axis control platform. The design of the table with replaceable work head, by identifying the ID on the head, change the control mode, enhance the functional diversity of the three-axis platform. In addition, in order to improve the universality of the system, the platform has many external communication interfaces, visual man-machine interface and LAN network communication functions.
2
Bao, Neng Sheng, Shi Liang Fei, Xue Jia Huang, Tie Quan Liu, and Jin Huang. "Labview-Based Automatic Four-Axis Positioning Control Air Temperature and Wind Speed Detection Platform for Drying Oven." Advanced Materials Research 718-720 (July 2013): 1547–53. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.1547.
Full textAbstract:
The design of domestic drying oven lacked theoretical basis and methods, especially a tool supporting experiments and verifying the results of theoretical research. This paper developed a platform, which can be used to automatically detect multi-point air temperature and wind speed from drying oven nozzle of printing and coating machines. The hardware design of platform achieves a four-axis positioning function by adopt a three-dimensional Cartesian coordinate robot and an additional servo motor. The LabVIEW-based software design of platform achieves many functions, including multi-axis positioning control, data acquisition and processing, data interface and operation interface. This platform contributes to research work for drying oven.
3
Aroca, Rafael Vidal, Carlos E. H. Ventura, Igor De Mello, and Tatiana F. P. A. T. Pazelli. "Sequential additive manufacturing: automatic manipulation of 3D printed parts." Rapid Prototyping Journal 23, no. 4 (June 20, 2017): 653–59. http://dx.doi.org/10.1108/rpj-02-2016-0029.
Full textAbstract:
Purpose This paper aims to present a monitoring system and the usage of a robotic arm to remove finished parts of a three-dimensional (3D) printer build plate, enabling 3D printers to continuously build a sequence of parts. Design/methodology/approach The system relies on a 2-degree of freedom planar manipulator. The moment to remove printed parts from the printer build plate can be determined based on direct communication with the 3D printer control software or using information from a computer vision system that applies background subtraction and Speeded up Robust Features methods. Findings The proposed system automatically detects the end of standard 3D print jobs and controls the robotic arm to remove the part. Research limitations/implications Lighting variation can deteriorate the response of the computer vision system, which can be minimized using a controlled illumination environment. In addition, the printer build plate edges must be free so the parts can slip off the printer build plate when the robot pushes them out. Practical implications The system enables a more practical and automatized usage of 3D printers, reducing the need of human operators. Social implications The proposed system can reduce work hours of laboratory personnel, as there is no need to remove the printed parts manually before another job starts. Originality/value Computer vision system monitors the printing process and the automation system that enables continuous sequential 3D printing of parts. A prototype is described, which can be easily replicated with low cost parts.
4
Villalba-Diez, Javier, Daniel Schmidt, Roman Gevers, Joaquín Ordieres-Meré, Martin Buchwitz, and Wanja Wellbrock. "Deep Learning for Industrial Computer Vision Quality Control in the Printing Industry 4.0." Sensors 19, no. 18 (September 15, 2019): 3987. http://dx.doi.org/10.3390/s19183987.
Full textAbstract:
Rapid and accurate industrial inspection to ensure the highest quality standards at a competitive price is one of the biggest challenges in the manufacturing industry. This paper shows an application of how a Deep Learning soft sensor application can be combined with a high-resolution optical quality control camera to increase the accuracy and reduce the cost of an industrial visual inspection process in the Printing Industry 4.0. During the process of producing gravure cylinders, mistakes like holes in the printing cylinder are inevitable. In order to improve the defect detection performance and reduce quality inspection costs by process automation, this paper proposes a deep neural network (DNN) soft sensor that compares the scanned surface to the used engraving file and performs an automatic quality control process by learning features through exposure to training data. The DNN sensor developed achieved a fully automated classification accuracy rate of 98.4%. Further research aims to use these results to three ends. Firstly, to predict the amount of errors a cylinder has, to further support the human operation by showing the error probability to the operator, and finally to decide autonomously about product quality without human involvement.
5
Ozcelik, Adem. "3D Printed Device for Separation of Cells and Particles by Tilted Bulk Acoustic Wave Actuation." Actuators 11, no. 9 (August 31, 2022): 249. http://dx.doi.org/10.3390/act11090249.
Full textAbstract:
Three-dimensional (3D) printing has been proven to be a reliable manufacturing method for a diverse set of applications in engineering. Simple benchtop tools such as mini centrifuges, automated syringe pumps, and basic-robotic platforms have been successfully printed by basic 3D printers. The field of lab-on-a-chip offers promising functions and convenience for point-of-care diagnostics and rapid disease screening for limited resource settings. In this work, stereolithography (SLA) 3D resin printing is implemented to fabricate a microfluidic device to be used for separation of HeLa cells from smaller polystyrene particles through titled angle standing bulk acoustic wave actuation. The demonstrated device achieved continuous and efficient separation of target cells with over 92% HeLa cell purity and 88% cell recovery rates. Overall, 3D printing is shown to be a viable method for fabrication of microfluidic devices for lab-on-a-chip applications.
6
Anikin, P. S., G. M. Shilo, R. A. Kulykovskyi, and D. E. Molochkov. "Automation control system of 3d printing robotic platform with implemented wire + arc welding technology." Electrical Engineering and Power Engineering, no. 4 (December 30, 2020): 35–48. http://dx.doi.org/10.15588/1607-6761-2020-4-4.
Full textAbstract:
Purpose. Development of the robotic platform automated control system architecture, development of the software control algorithm.
Methodology. To implement the algorithm of the control program, computer modeling of thermal regimes in CAE systems is used. The basic parameters of the single layer printing technique were obtained by experimental use of the wire plus arc additive manufacturing (WAAM) technology.
Findings. Requirements for manufacturability and printing quality of the manufactured parts were defined in the form of geometric dimensions, surface waviness, parameters of the desired microstructure state, residual stresses, maintaining of the optimal manufacturing speed. Based on the requirements of manufacturability analysis, an algorithm for the control program was developed. Robotic platform automated control system architecture with feedback device for the thermal mode control, parameters of the geometrical form of the manufactured part and weld pool were developed. Three -level hierarchical model, which gives an ability to consider in the process of 3D printing each level individually in terms of welding bead, layer and wall, was developed. The input data for the operation of the automated control system of the robotic platform using the technology of electric arc welding are determined. Basic geometrical parameters and the simple welding bead and the methods of overlapping of two or more beads were shown. Critical differences between ideal and real welding overlapping models were considered for necessity of taking into account whilst generating robot control software. Analysis of the possibilities for the CAE simulation of the three-dimensional printing using wire plus arc additive manufacturing technology is performed to determine the influence of the temperature parameters, mechanical loads, toolpath change, and based on the data obtained, it became possible to determine residual stresses and defects in manufactured parts.
Originality. Robotic platform automated control system architecture with feedback device for the control of thermal mode, parameters of the geometrical form of the manufactured part and weld pool was developed. Three-level hierarchical model for the wire plus arc additive manufacturing (WAAM) technology was created. Software control algorithm which provides an opportunity to improve geometrical and mechanical properties of the manufactured parts was developed.
Practical value. Development of an automated control system for 3D printing robotic platform with WAAM implemented technology, which will provide an opportunity for increase in the printing accuracy of the manufactured parts and will help to reduce manufacturing time.
7
HUSIEV, O. V., and T. D. NIKIFOROVA. "RESEARCH OF THE CONVERTING STAGES FOR THE VOLUME MODEL OF THE PRODUCT INTO THE CONTROL CODE FOR A 3D PRINTER IN THE CONTEXT OF AUTOMATED CONSTRUCTION OF 3D PRINTING TECHNOLOGY." Ukrainian Journal of Civil Engineering and Architecture, no. 4 (October 22, 2022): 38–45. http://dx.doi.org/10.30838/j.bpsacea.2312.250822.38.876.
Full textAbstract:
Problem statement. The integration of the latest technologies in the field of software at the stages of construction appears as one of the main tasks for designers. Creating objects based on 3D printing technology requires the use of appropriate high-tech solutions. One of these solutions is the analysis of the converting process a three-dimensional model into a control code for 3D printing − it is precisely from this analysis that the degree of construction efficiency for building structures by the 3D printing method depends. The purpose of the article. Based on the analysis of 3D printing concepts and modern software, form a conceptual diagram of the converting stages for the product three-dimensional model into a control code for 3D printers. Determine shortcomings that can complicate the implementation of this process. Conclusions. The working process of 3D printing is complex and requires in-depth knowledge of both the software and hardware of the system as a whole. A detailed study of this issue will further optimize the planning of construction processes, which in turn plays an important role in the overall efficiency of the 3D printing system. The use of 3D computer graphics programs may not include models’ specific features that will be key importance for 3D printing. Surface tessellation done in CAD for modeling often ends up with errors in the *.STL data structure in the form of gaps and holes, resulting in open loops in cross-sections that cannot be fabricated as layers in practice. When converting 3D models to *.STL format automatically, with the help of specialized software packages, you should take the time to thoroughly check the STL format. G-code is the first step towards understanding the digital software control of a 3D printer. It can be generated automatically, which can lead to a large number of errors. At the converting stage of the 3D model into *.STL format and in the direct process of G-code generation, highly qualified interdisciplinary specialists who are able to combine these technologies in practice.
8
Sundaram, Subramanian, Melina Skouras, David S. Kim, Louise van den Heuvel, and Wojciech Matusik. "Topology optimization and 3D printing of multimaterial magnetic actuators and displays." Science Advances 5, no. 7 (July 2019): eaaw1160. http://dx.doi.org/10.1126/sciadv.aaw1160.
Full textAbstract:
Upcoming actuation systems will be required to perform multiple tightly coupled functions analogous to their natural counterparts; e.g., the ability to control displacements and high-resolution appearance simultaneously is necessary for mimicking the camouflage seen in cuttlefish. Creating integrated actuation systems is challenging owing to the combined complexity of generating high-dimensional designs and developing multifunctional materials and their associated fabrication processes. Here, we present a complete toolkit consisting of multiobjective topology optimization (for design synthesis) and multimaterial drop-on-demand three-dimensional printing for fabricating complex actuators (>106 design dimensions). The actuators consist of soft and rigid polymers and a magnetic nanoparticle/polymer composite that responds to a magnetic field. The topology optimizer assigns materials for individual voxels (volume elements) while simultaneously optimizing for physical deflection and high-resolution appearance. Unifying a topology optimization-based design strategy with a multimaterial fabrication process enables the creation of complex actuators and provides a promising route toward automated, goal-driven fabrication.
9
Singh, Rajesh, Anita Gehlot, Shaik Vaseem Akram, Lovi Raj Gupta, Manoj Kumar Jena, Chander Prakash, Sunpreet Singh, and Raman Kumar. "Cloud Manufacturing, Internet of Things-Assisted Manufacturing and 3D Printing Technology: Reliable Tools for Sustainable Construction." Sustainability 13, no. 13 (June 30, 2021): 7327. http://dx.doi.org/10.3390/su13137327.
Full textAbstract:
The United Nations (UN) 2030 agenda on sustainable development goals (SDGs) encourages us to implement sustainable infrastructure and services for confronting challenges such as large energy consumption, solid waste generation, depletion of water resources and emission of greenhouse gases in the construction industry. Therefore, to overcome challenges and establishing sustainable construction, there is a requirement to integrate information technology with innovative manufacturing processes and materials science. Moreover, the wide implementation of three-dimensional printing (3DP) technology in constructing monuments, artistic objects, and residential buildings has gained attention. The integration of the Internet of Things (IoT), cloud manufacturing (CM), and 3DP allows us to digitalize the construction for providing reliable and digitalized features to the users. In this review article, we discuss the opportunities and challenges of implementing the IoT, CM, and 3D printing (3DP) technologies in building constructions for achieving sustainability. The recent convergence research of cloud development and 3D printing (3DP) are being explored in the article by categorizing them into multiple sections including 3D printing resource access technology, 3D printing cloud platform (3D–PCP) service architectures, 3D printing service optimized configuration technology, 3D printing service evaluation technology, and 3D service control and monitoring technology. This paper also examines and analyzes the limitations of existing research and, moreover, the article provides key recommendations such as automation with robotics, predictive analytics in 3DP, eco-friendly 3DP, and 5G technology-based IoT-based CM for future enhancements.
10
Pahlevanzadeh, Farnoosh, Mohsen Setayeshmehr, Hamid Reza Bakhsheshi-Rad, Rahmatollah Emadi, Mahshid Kharaziha, S. Ali Poursamar, Ahmad Fauzi Ismail, Safian Sharif, Xiongbiao Chen, and Filippo Berto. "A Review on Antibacterial Biomaterials in Biomedical Applications: From Materials Perspective to Bioinks Design." Polymers 14, no. 11 (May 31, 2022): 2238. http://dx.doi.org/10.3390/polym14112238.
Full textAbstract:
In tissue engineering, three-dimensional (3D) printing is an emerging approach to producing functioning tissue constructs to repair wounds and repair or replace sick tissue/organs. It allows for precise control of materials and other components in the tissue constructs in an automated way, potentially permitting great throughput production. An ink made using one or multiple biomaterials can be 3D printed into tissue constructs by the printing process; though promising in tissue engineering, the printed constructs have also been reported to have the ability to lead to the emergence of unforeseen illnesses and failure due to biomaterial-related infections. Numerous approaches and/or strategies have been developed to combat biomaterial-related infections, and among them, natural biomaterials, surface treatment of biomaterials, and incorporating inorganic agents have been widely employed for the construct fabrication by 3D printing. Despite various attempts to synthesize and/or optimize the inks for 3D printing, the incidence of infection in the implanted tissue constructs remains one of the most significant issues. For the first time, here we present an overview of inks with antibacterial properties for 3D printing, focusing on the principles and strategies to accomplish biomaterials with anti-infective properties, and the synthesis of metallic ion-containing ink, chitosan-containing inks, and other antibacterial inks. Related discussions regarding the mechanics of biofilm formation and antibacterial performance are also presented, along with future perspectives of the importance of developing printable inks.
11
Scheubeck, R., W. Gruebl, A. Pletsch, U. Schiller, and R. Wurm. "Laser structuring of printed layers on thick film ceramic substrates." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, CICMT (September 1, 2015): 000294–96. http://dx.doi.org/10.4071/cicmt-tha23.
Full textAbstract:
The market for automatic transmissions continues to grow. In addition to what originally attracted interest to the product – enhanced driver convenience – the prospect of greater fuel efficiency is now a further factor in their favor. Continental has been offering transmission control units (TCU) since 1982, starting with those for simple three-gear conventional automatic transmissions, followed by all-wheel applications in 1985, CVT applications in 1999, truck applications in 2000, and arriving at the double clutch transmissions in widespread use today. At present Continental Business Unit Transmission is technology leader worldwide in the market for transmission controls for the full spectrum of automatic drives. Continental TCU's are divided in “Stand alone”, “Attached to” and “Integrated” TCU's. However the “Stand alone” and “Attached to” TCU's are normally equipped with standard PCB substrates. Because of the highest requirements in temperature, vibration and typical medias (aggressive Transmission oils – liquid & gaseous), standard organic substrates cannot be used, ceramic substrates are typically preferred. A common technology in that case is the ceramic based thick film technology, where conductor and resistor pastes are printed on the surface of a ceramic alumina substrate by using a common screen printing process. The printed layers (Au, Ag, AgPd, AgPt) have to be dried and thermally sintered after appliance. The increasing functionality of the TCU's and the increasing requirements due to miniaturization inherently show that thickfilm technology, as applied in a standard printing process, is not possible to reach those requirements. Continental has developed a concept to realize higher miniaturization of the circuit boards. Therefore a innovative laser structuring process has been installed for the newest generations of TCU's in cooperation with a leading machine and system manufacturer. By using the laser structuring of conductor lines it allows Continental to increase the connection density by keeping the substrate size unchanged. Typical common printing pitches in thickfilm production are 300μm, however pitches of 100μm are possible by laser structuring in mass production.
12
Worsley, Marcus Andre, Victor A. Beck, Mariana Desiree Reale Batista, Swetha Chandrasekaran, Bryan Moran, Miguel A. Salazar de Troya, Adam Carleton, et al. "(Invited) 3D Printing of 2D Materials for Optimized Electrochemical Performance." ECS Meeting Abstracts MA2022-01, no. 12 (July 7, 2022): 2460. http://dx.doi.org/10.1149/ma2022-01122460mtgabs.
Full textAbstract:
Electrochemical energy storage (EES) and conversion devices (e.g. batteries, supercapacitors, and reactors) are emerging as primary methods for global efforts to shift energy dependence from limited fossil fuels towards sustainable and renewable resources. These electric-based devices, while showing great potential for meeting some key metrics set by conventional technologies, still face significant limitations. For example, an EES device tends to exhibit large energy density (e.g. lithium-ion battery) or power density (e.g. supercapacitor), but not both. This inability of a single device to simultaneously achieve both metrics represents a major obstacle to widespread adoption of EES devices. Improvements in materials, such as the integration of 2D materials (e.g. graphene, dichalcogenides, MXene, etc.) into electrochemical devices has yielded some exciting results towards tackling this issue, but significant improvements are still needed. Our approach to simultaneously achieving high energy and power density is to focus on one of the fundamental processes that occur in these systems: mass (or charge) transport. The efficient transport of ions within EES devices is critical to realizing both large power and energy densities. The pore structure of the electrode is a key factor in determining this transport phenomena, but in many cases, engineering the pore structure in a highly deterministic fashion is not pursued or even possible for many electrode materials. In this work, we explore a number of additive manufacturing methods (e.g. direct ink write, projection microstereolithography, etc.) to engineer the pore structure of device electrodes. We also determine effective electrode geometries using both simple theory and topology optimization techniques. The topology optimization couples the solution of the forward electrochemical problem over the full electrode domain with gradient-based optimization. The output of our code is a three-dimensional CAD representation which optimizes over specific performance metrics and which can be used to print functional electrodes. This work provides a systematic path toward automatic design and fabrication of engineered electrodes with precise control over the fluid and species distribution.
13
Turchini, John, Michael E. Buckland, Anthony J. Gill, and Shane Battye. "Three-Dimensional Pathology Specimen Modeling Using “Structure-From-Motion” Photogrammetry: A Powerful New Tool for Surgical Pathology." Archives of Pathology & Laboratory Medicine 142, no. 11 (May 30, 2018): 1415–20. http://dx.doi.org/10.5858/arpa.2017-0145-oa.
Full textAbstract:
Context.— Three-dimensional (3D) photogrammetry is a method of image-based modeling in which data points in digital images, taken from offset viewpoints, are analyzed to generate a 3D model. This modeling technique has been widely used in the context of geomorphology and artificial imagery, but has yet to be used within the realm of anatomic pathology. Objective.— To describe the application of a 3D photogrammetry system capable of producing high-quality 3D digital models and its uses in routine surgical pathology practice as well as medical education. Design.— We modeled specimens received in the 2 participating laboratories. The capture and photogrammetry process was automated using user control software, a digital single-lens reflex camera, and digital turntable, to generate a 3D model with the output in a PDF file. Results.— The entity demonstrated in each specimen was well demarcated and easily identified. Adjacent normal tissue could also be easily distinguished. Colors were preserved. The concave shapes of any cystic structures or normal convex rounded structures were discernable. Surgically important regions were identifiable. Conclusions.— Macroscopic 3D modeling of specimens can be achieved through Structure-From-Motion photogrammetry technology and can be applied quickly and easily in routine laboratory practice. There are numerous advantages to the use of 3D photogrammetry in pathology, including improved clinicopathologic correlation for the surgeon and enhanced medical education, revolutionizing the digital pathology museum with virtual reality environments and 3D-printing specimen models.
14
Чабаненко, Александр, and Alexander Chabanenko. "MODELING OF 3D PRINTING PROCESSES IN QUALITY MANAGEMENT OF THE CONSTRUCTION OF A PHYSICAL MODEL OF AN OBJECT." Automation and modeling in design and management of 2019, no. 1 (April 9, 2019): 10–15. http://dx.doi.org/10.30987/article_5c9b8b2bbda429.08710649.
Full textAbstract:
In recent years, the methods of layer-by-layer synthesis of prototype products, which is included in additive technologies, have formed a fundamentally new direction in technology, where it is necessary to produce experimental, single, exclusive and unique product samples. The fundamental difference between these methods is that the finished part is obtained not by removing a layer of material from the workpiece, as is customary in traditional methods of processing, and due to the layer-by-layer build-up of the material while obtaining a given shape and size of the product. At the same time, the main feature of these methods is the mandatory use of three-dimensional computer-aided design of the product as the initial stage of layer-by-layer synthesis technology. The use of these technologies is particularly promising in the production of housing elements of electronic equipment due to the ability to consider the specifics of the equipment.
The use of additive technologies provides an increase in performance and a decrease in the influence of the form factor of the body at the production stage.
An additional advantage of the additive installation is that in the manufacture of preforms are not required to resort to third-party technological solutions in the form of cutting, grinding, welding, which requires additional equipment and the involvement of qualified specialists. With the help of modeling mechanisms of 3D printers, it is possible to provide fully automatic production of preforms, having an additive installation. A process control additive production will ensure the quality of the final product.
15
Prinsloo, Jaco, Saurabh Sinha, and Basie von Solms. "A Review of Industry 4.0 Manufacturing Process Security Risks." Applied Sciences 9, no. 23 (November 26, 2019): 5105. http://dx.doi.org/10.3390/app9235105.
Full textAbstract:
The advent of three-dimensional (3D) printing has found a unique and prominent role in Industry 4.0 and is rapidly gaining popularity in the manufacturing industry. 3D printing offers many advantages over conventional manufacturing methods, making it an attractive alternative that is more cost-effective and efficient than conventional manufacturing methods. With the Internet of Things (IoT) at the heart of this new movement, control over manufacturing methods now enters the cyber domain, offering endless possibilities in manufacturing automation and optimization. However, as disruptive and innovative as this may seem, there is grave concern about the cyber-security risks involved. These security aspects are often overlooked, particularly by promising new start-ups and parties that are not too familiar with the risks involved in not having proper cyber-security measures in place. This paper explores some of the cyber-security risks involved in the bridge between industrial manufacturing and Industry 4.0, as well as the associated countermeasures already deployed or currently under development. These aspects are then contextualized in terms of Industry 4.0 in order to serve as a basis for and assist with future development in this field.
16
Bui, Trong Hieu, and Thanh Huy Phung. "Design and fabrication of precise shoeupper feeder system for screen printing machine in shoe industry." Science and Technology Development Journal 18, no. 1 (March 31, 2015): 5–15. http://dx.doi.org/10.32508/stdj.v18i1.936.
Full textAbstract:
The feeding stage of sport shoe-upper for automatic screen printing machine for printing press-segments on shoe-upper exists the following issues: Firstly, the locating shoe-uppers on the conveyor of screen printing machine is made by hand and based on the experience of workers. So, this reduces productivity and increases the cost of the product. Secondly, there are deviations of the press-segments on shoeupper after printing (the current deviation is ± 1 mm). So, these are affected to the next stage of sewing contour lines on the shoe-upper. Currently, the shoe manufacturing company in Vietnam wish solve these problems, but so far, in addition to resolve manually there is no feasible method has been given. In this paper, a precise position control of shoe-upper for screen printing machine using image processing techniques is introduced. A camera is used to capture the image of shoeupper. The binary image of shoe-upper is used for image processing to recognize the position errors in directions of X, Y and θ coordinates. A new algorithm to calculate the position errors of shoeupper is proposed in this paper. The shoe-upper is locating on X - Y - θ tables which can move X, Y directions and rotating angle. These tables are controlled by three servo motors. The mission of X - Y - θ tables are adjustable positioning accuracy of the shoes-upper by comparing the current position with its standard position that has been previously stored in the computer. The effectiveness of the calculation algorithm of shoeupper errors and the high accuracy of image processing and mechanical system are proven through experimental results
17
Bergonzi, Carlo, Annalisa Bianchera, Giulia Remaggi, Maria Cristina Ossiprandi, Ruggero Bettini, and Lisa Elviri. "3D Printed Chitosan/Alginate Hydrogels for the Controlled Release of Silver Sulfadiazine in Wound Healing Applications: Design, Characterization and Antimicrobial Activity." Micromachines 14, no. 1 (January 4, 2023): 137. http://dx.doi.org/10.3390/mi14010137.
Full textAbstract:
The growing demand for personalized medicine requires innovation in drug manufacturing to combine versatility with automation. Here, three-dimensional (3D) printing was explored for the production of chitosan (CH)/alginate (ALG)-based hydrogels intended as active dressings for wound healing. ALG hydrogels were loaded with 0.75% w/v silver sulfadiazine (SSD), selected as a drug model commonly used for the therapeutic treatment of infected burn wounds, and four different 3D CH/ALG architectures were designed to modulate the release of this active compound. CH/ALG constructs were characterized by their water content, elasticity and porosity. ALG hydrogels (Young’s modulus 0.582 ± 0.019 Mpa) were statistically different in terms of elasticity compared to CH (Young’s modulus 0.365 ± 0.015 Mpa) but very similar in terms of swelling properties (water content in ALG: 93.18 ± 0.88% and in CH: 92.76 ± 1.17%). In vitro SSD release tests were performed by using vertical diffusion Franz cells, and statistically significant different behaviors in terms of the amount and kinetics of drugs released were observed as a function of the construct. Moreover, strong antimicrobial potency (100% of growth inhibition) against Staphylococcus aureus and Pseudomonas aeruginosa was demonstrated depending on the type of construct, offering a proof of concept that 3D printing techniques could be efficiently applied to the production of hydrogels for controlled drug delivery.
18
Abdulhameed, Osama, Syed Hammad Mian, Khaja Moiduddin, Abdulrahman Al-Ahmari, Naveed Ahmed, and Mohamed K. Aboudaif. "A Multi-Part Orientation Planning Schema for Fabrication of Non-Related Components Using Additive Manufacturing." Micromachines 13, no. 10 (October 19, 2022): 1777. http://dx.doi.org/10.3390/mi13101777.
Full textAbstract:
Additive manufacturing (AM) is a technique that progressively deposits material in layer-by-layer manner (or in additive fashion) for producing a three-dimensional (3D) object, starting from the computer-aided design (CAD) model. This approach allows for the printing of complicated shaped objects and is quickly gaining traction in the aerospace, medical implant, jewelry, footwear, automotive, and fashion industries. AM, which was formerly used for single part customization, is currently being considered for mass customization of parts because of its positive impacts. However, part quality and build time are two main impediments to the deployment of AM for mass production. The optimal part orientation is fundamental for maximizing the part’s quality as well as being critical for reducing the fabrication time. This research provides a new method for multi-part AM production that improves quality while reducing overall build time. The automatic setup planning or orientation approach described in this paper employs two objective functions: the quality of the build component and the build time. To tackle the given problem, it introduces a three-step genetic algorithm (GA)-based solution. A feature-based technique is utilized to generate a collection of finite alternative orientations for each component within a specific part group to ensure each part’s individual build quality. Then, a GA was utilized to find the best combination of part build orientations at a global optimal level to reduce material consumption and build time. A case study of orienting nine components concurrently inside a given building chamber was provided for illustration. The findings suggest that the developed technique can increase quality, reduce support waste, and shorten overall production time. When components are positioned optimally rather than in random orientations, build time and support volume are reduced by approximately 7% and 16%, respectively.
19
Toporkov, P. S., Yu V. Fedosov, and M. Ya Аfanasyev. "Automatic detection of filament burr in three-dimensional printing devices." Izvestiâ vysših učebnyh zavedenij. Priborostroenie 65, no. 8 (August 31, 2022): 581–84. http://dx.doi.org/10.17586/0021-3454-2022-65-8-581-584.
Full text
20
Kaplun, Dmitry, Mikhail Golovin, Alisa Sufelfa, Oskar Sachenkov, Konstantin Shcherbina, Vladimir Yankovskiy, Eugeniy Skrebenkov, Oleg A. Markelov, and Mikhail I. Bogachev. "Three-Dimensional (3D) Model-Based Lower Limb Stump Automatic Orientation." Applied Sciences 10, no. 9 (May 7, 2020): 3253. http://dx.doi.org/10.3390/app10093253.
Full textAbstract:
Modern prosthetics largely relies upon visual data processing and implementation technologies such as 3D scanning, mathematical modeling, computer-aided design (CAD) tools, and 3D-printing during all stages from design to fabrication. Despite the intensive advancement of these technologies, once the prosthetic socket model is obtained by 3D scanning, its appropriate orientation and positioning remain largely the responsibility of an expert requiring substantial manual effort. In this paper, an automated orientation algorithm based on the adjustment of the 3D-model virtual anatomical axis of the tibia along with the vertical axis of the rectangular coordinates in three-dimensional space is proposed. The suggested algorithm is implemented, tested for performance and experimentally validated by explicit comparisons against an expert assessment.
21
Nascimento, Daniel Luiz Mattos, Viviam Alencastro, Osvaldo Luiz Gonçalves Quelhas, Rodrigo Goyannes Gusmão Caiado, Jose Arturo Garza-Reyes, Luis Rocha-Lona, and Guilherme Tortorella. "Exploring Industry 4.0 technologies to enable circular economy practices in a manufacturing context." Journal of Manufacturing Technology Management 30, no. 3 (April 15, 2019): 607–27. http://dx.doi.org/10.1108/jmtm-03-2018-0071.
Full textAbstract:
Purpose The purpose of this paper is to explore how rising technologies from Industry 4.0 can be integrated with circular economy (CE) practices to establish a business model that reuses and recycles wasted material such as scrap metal or e-waste. Design/methodology/approach The qualitative research method was deployed in three stages. Stage 1 was a literature review of concepts, successful factors and barriers related to the transition towards a CE along with sustainable supply chain management, smart production systems and additive manufacturing (AM). Stage 2 comprised a conceptual framework to integrate and evaluate the synergistic potential among these concepts. Finally, stage 3 validated the proposed model by collecting rich qualitative data based on semi-structured interviews with managers, researchers and professors of operations management to gather insightful and relevant information. Findings The outcome of the study is the recommendation of a circular model to reuse scrap electronic devices, integrating web technologies, reverse logistics and AM to support CE practices. Results suggest a positive influence from improving business sustainability by reinserting waste into the supply chain to manufacture products on demand. Research limitations/implications The impact of reusing wasted materials to manufacture new products is relevant to minimising resource consumption and negative environmental impacts. Furthermore, it avoids hazardous materials ending up in landfills or in the oceans, seriously threatening life in ecosystems. In addition, reuse of wasted material enables the development of local business networks that generate jobs and improve economic performance. Practical implications First, the impact of reusing materials to manufacture new products minimises resource consumption and negative environmental impacts. The circular model also encourages keeping hazardous materials that seriously threaten life in ecosystems out of landfills and oceans. For this study, it was found that most urban waste is plastic and cast iron, leaving room for improvement in increasing recycling of scrap metal and similar materials. Second, the circular business model promotes a culture of reusing and recycling and motivates the development of collection and processing techniques for urban waste through the use of three-dimensional (3D) printing technologies and Industry 4.0. In this way, the involved stakeholders are focused on the technical parts of recycling and can be better dedicated to research, development and innovation because many of the processes will be automated. Social implications The purpose of this study was to explore how Industry 4.0 technologies are integrated with CE practices. This allows for the proposal of a circular business model for recycling waste and delivering new products, significantly reducing resource consumption and optimising natural resources. In a first stage, the circular business model can be used to recycle electronic scrap, with the proposed integration of web technologies, reverse logistics and AM as a technological platform to support the model. These have several environmental, sociotechnical and economic implications for society. Originality/value The sociotechnical aspects are directly impacted by the circular smart production system (CSPS) management model, since it creates a new culture of reuse and recycling techniques for urban waste using 3D printing technologies, as well as Industry 4.0 concepts to increase production on demand and automate manufacturing processes. The tendency of the CSPS model is to contribute to deployment CE in the manufacture of new products or parts with AM approaches, generating a new path of supply and demand for society.
22
Matsusaki, Michiya, Kayo Sakaue, Koji Kadowaki, and Mitsuru Akashi. "Three-Dimensional Human Tissue Chips Fabricated by Rapid and Automatic Inkjet Cell Printing." Advanced Healthcare Materials 2, no. 4 (November 2, 2012): 534–39. http://dx.doi.org/10.1002/adhm.201200299.
Full text
23
Gu, Qi, He Zhu, Jing Li, Xia Li, Jie Hao, Gordon G. Wallace, and Qi Zhou. "Three-dimensional bioprinting speeds up smart regenerative medicine." National Science Review 3, no. 3 (July 7, 2016): 331–44. http://dx.doi.org/10.1093/nsr/nww037.
Full textAbstract:
Abstract Biological materials can actively participate in the formation of bioactive organs and can even control cell fate to form functional tissues that we name as the smart regenerative medicine (SRM). The SRM requires interdisciplinary efforts to finalize the pre-designed organs. Three-dimensional (3D) printing, as an additive manufacturing technology, has been widely used in various fields due to its high resolution and individuation. In SRM, with the assistance of 3D printing, cells and biomaterials could be precisely positioned to construct complicated tissues. This review summarizes the state of the SRM advances and focuses in particular on the 3D printing application in biofabrication. We further discuss the issues of SRM development and finally propose some approaches for future 3D printing, which involves SRM.
24
Lee, Chaeyoung, Darae Jeong, Sungha Yoon, and Junseok Kim. "Porous Three-Dimensional Scaffold Generation for 3D Printing." Mathematics 8, no. 6 (June 9, 2020): 946. http://dx.doi.org/10.3390/math8060946.
Full textAbstract:
In this paper, we present an efficient numerical method for arbitrary shaped porous structure generation for 3D printing. A phase-field model is employed for modeling phase separation phenomena of diblock copolymers based on the three-dimensional nonlocal Cahn–Hilliard (CH) equation. The nonlocal CH equation is a fourth-order nonlinear partial differential equation. To efficiently solve the governing equation, an unconditionally gradient stable convex splitting method for temporal discretization with a Fourier spectral method for the spatial discretization is adopted. The standard fast Fourier transform is used to speed up the computation. A new local average concentration function is introduced to the original nonlocal CH equation so that we can locally control the morphology of the structure. The proposed algorithm is simple to implement and complex shaped structures can also be implemented with corresponding signed distance fields. Various numerical tests are performed on simple and complex structures. The computational results demonstrate that the proposed method is efficient to generate irregular porous structures for 3D printing.
25
Teo, Mei Ying, Logan Stuart, Kean C. Aw, and Jonathan Stringer. "Micro-reactive Inkjet Printing of Three-Dimensional Hydrogel Structures." MRS Advances 3, no. 28 (December 28, 2017): 1575–81. http://dx.doi.org/10.1557/adv.2017.628.
Full textAbstract:
AbstractInkjet printing, of the researched techniques for printing of hydrogels, gives perhaps the best potential control over the shape and composition of the final hydrogel. It is, however, fundamentally limited by the low viscosity of the printed ink, which means that crosslinking of the hydrogel must take place after printing. This can be particularly problematic for hydrogels as the slow diffusion of the crosslinking species through the gel results in very slow vertical printing speeds, leading to dehydration of the gel and (if simultaneously deposited) cell death. Previous attempts to overcome this limitation have involved the sequential printing of alternating layers to reduce the diffusion distance of reactive species. In this work we demonstrate an alternative approach where the crosslinker and gelator are printed so that they collide with each other before impinging upon the substrate, thereby facilitating hydrogel synthesis and patterning in a single step. Using a model system based upon sodium alginate and calcium chloride a series of 3D structures are demonstrated, with vertical printing speeds significantly faster than previous work. The droplet collision is shown to increase advective mixing before impact, reducing the time taken for gelation to occur, and improving definition of printed patterns. With the facile addition of more printing inks, this approach also enables spatially varied composition of the hydrogel, and work towards this will be discussed.
26
Cho, Wonjoon, Emanuel M. Sachs, Nicholas M. Patrikalakis, and Donald E. Troxel. "A dithering algorithm for local composition control with three-dimensional printing." Computer-Aided Design 35, no. 9 (August 2003): 851–67. http://dx.doi.org/10.1016/s0010-4485(02)00122-7.
Full text
27
Connell, Jodi L., Eric T. Ritschdorff, and Jason B. Shear. "Three-Dimensional Printing of Photoresponsive Biomaterials for Control of Bacterial Microenvironments." Analytical Chemistry 88, no. 24 (November 28, 2016): 12264–71. http://dx.doi.org/10.1021/acs.analchem.6b03440.
Full text
28
Shen, Xin Min, Jian Zhao Zhou, and Qun Zhang Tu. "Development of Three-Dimensional Printing Technology Based on Deterministic Electrochemical Deposition Method." Advanced Materials Research 1089 (January 2015): 319–23. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.319.
Full textAbstract:
Three-dimensional printing technology based on deterministic electrochemical deposition method has been developed, which is generated from the electroplating. The traditional electroplating system has been improved to ensure the printing process controllable. Through accurate control of the deposition region, deposition rate, and the dwelling time in the printing process, a three-dimensional object of almost any shape can be obtained by deterministic manufacturing process. Through addition of alcohol to the electrolyte, Marangoni effect is generated, which will improve the property of the deposited layer. The deterministic electrochemical deposition not only can decrease the cost of the printing process, but also will promote the application of the 3D printing technique in many fields.
29
Chen, Tin-Chih Toly, and Yu-Cheng Lin. "Diverse three-dimensional printing capacity planning for manufacturers." Robotics and Computer-Integrated Manufacturing 67 (February 2021): 102052. http://dx.doi.org/10.1016/j.rcim.2020.102052.
Full text
30
Nezhmetdinov, Ramil, Ilya Kovalev, Pavel Melikov, and Sergey Sokolov. "Research and Development of Food Industry’s Three-Dimensional Printing." MATEC Web of Conferences 346 (2021): 03071. http://dx.doi.org/10.1051/matecconf/202134603071.
Full textAbstract:
In the presented article, the problem of building a specialized plant for food 3D printing is considered, which allows printing with various food semi-finished products with minimal changeover or without it. The developed plant, including all its software and hardware components, should be flexible and, according to the principles of construction and use, should approach the analogs of additive equipment existing on the market and to the classical control systems corresponding to it, but have more functionality and a lower price. The development of such compact solutions will make it possible to use them both for small cafes, restaurants, and in large factories.
31
Cui, Huachen, Desheng Yao, Ryan Hensleigh, Haotian Lu, Ariel Calderon, Zhenpeng Xu, Sheyda Davaria, et al. "Design and printing of proprioceptive three-dimensional architected robotic metamaterials." Science 376, no. 6599 (June 17, 2022): 1287–93. http://dx.doi.org/10.1126/science.abn0090.
Full textAbstract:
Advances in additive manufacturing techniques have enabled the creation of stimuli-responsive materials with designed three-dimensional (3D) architectures. Unlike biological systems in which functions such as sensing, actuation, and control are closely integrated, few architected materials have comparable system complexity. We report a design and manufacturing route to create a class of robotic metamaterials capable of motion with multiple degrees of freedom, amplification of strain in a prescribed direction in response to an electric field (and vice versa), and thus, programmed motions with self-sensing and feedback control. These robotic metamaterials consist of networks of piezoelectric, conductive, and structural elements interwoven into a designed 3D lattice. The resulting architected materials function as proprioceptive microrobots that actively sense and move.
32
Grim, Anna, Timothy O’Connor, Peter J. Olver, Chehrzad Shakiban, Ryan Slechta, and Robert Thompson. "Automatic Reassembly of Three-Dimensional Jigsaw Puzzles." International Journal of Image and Graphics 16, no. 02 (April 2016): 1650009. http://dx.doi.org/10.1142/s0219467816500091.
Full textAbstract:
In this paper, we present an effective algorithm for reassembling three-dimensional apictorial jigsaw puzzles obtained by dividing a curved surface into a finite number of interlocking pieces. As such, our algorithm does not make use of any picture or design that may be painted on the surface; nor does it require a priori knowledge of the overall shape of the original surface. A motivating example is the problem of virtually reconstructing a broken ostrich egg shell. In order to develop and test the algorithm, we also devise a method for constructing synthetic three-dimensional puzzles by randomly distributing points on a compact surface with respect to surface area measure, then determining the induced Voronoi tessellation, and finally curving the Voronoi edges by using Bezier curves with selected control points. Our edge-matching algorithm relies on the method of Euclidean signature curves. The edges of the puzzle pieces are divided into bivertex arcs, whose signatures are directly compared. The algorithm has been programmed in Matlab and is able to successfully reassemble a broad range of artificial puzzles, including those subjected to a reasonable amount of noise. Moreover, significant progress has been made on reassembly of the real-world ostrich egg data.
33
Mykhailyshyn, Roman, František Duchoň, Mykhailo Mykhailyshyn, and Ann Majewicz Fey. "Three-Dimensional Printing of Cylindrical Nozzle Elements of Bernoulli Gripping Devices for Industrial Robots." Robotics 11, no. 6 (December 3, 2022): 140. http://dx.doi.org/10.3390/robotics11060140.
Full textAbstract:
The application of additive technologies, namely, fused deposition modeling, is a new reality for prototyping gripping devices of industrial robots. However, during 3D printing of holes and nozzle elements, difficulties arise with reducing their diameter. Therefore, this article conducts a comprehensive study of the Bernoulli gripping device prototype with a cylindrical nozzle, manufactured by fused deposition modeling 3D printing. The three main reasons for reducing the diameter of the gripper nozzle after printing were due to the poor-quality model, excessive extrusion of plastic in the middle of the arc printing path, and linear shrinkage of printing material after cooling. The proposed methodology consisted of determining the three coefficients that allowed the determination of the diameter of the designed nozzle. The use of air pressure distributions on the surface of the manipulation object, and lifting forces of gripping devices with different 3D printing layer heights were found. It was experimentally determined that as the height of the printing layer increased, the lifting force decreased. This was due to the formation of swirls due to the increased roughness of the grip surface. It was proven that as the height between the manipulation object and the grip increased, the effect of surface roughness on the lifting force decreased, resulting in an increase in the lifting force. Determination of the rational operating parameters of gripping devices manufactured by 3D printing from the point of view of maximum lifting force, were determined.
34
Al Rashid, Ans, Sikandar Abdul Qadir, and Muammer Koç. "Microscopic analysis on dimensional capability of fused filament fabrication three-dimensional printing process." Journal of Elastomers & Plastics 54, no. 2 (October 22, 2021): 385–403. http://dx.doi.org/10.1177/00952443211047263.
Full textAbstract:
Fused Filament Fabrication (FFF) has been the most widely used three-dimensional printing (3DP) technology due to its cost-effectiveness, easy application, and material readiness. FFF, to date, has been used to fabricate polymer components for rapid prototyping and increasingly for some end-user applications. Thus, there is a pressing need to optimize 3DP process parameters for FFF materials to achieve higher dimensional accuracy, especially in functional components for final use applications. Therefore, to ensure desired geometries with reasonable accuracy, precise measurements are required to validate the FFF process’s dimensional capability under different process conditions. This study presents the dimensional measurement and statistical analysis to evaluate the effect of printing materials, speed, and layer heights on dimensional accuracy and repeatability of the commercial FFF process. A benchmark part model was designed with different external and internal features commonly used in manufacturing processes. Taguchi’s design of experiments (DOE) was employed to obtain the experiments scheme, followed by the 3DP, dimensional measurement, and analysis of 3DP samples. Results revealed polylactic acid (PLA) material provided better dimensional control in most of the features. Higher printing speeds and layer heights were found optimum for external features/protrusions, whereas lower-to-medium speeds and layer heights were more appropriate for the fabrication of internal features.
35
Skrzek, Kinga, and Mariusz Piotr Hetmanczyk. "FABRICATION CYCLES COMPARISON OF ASSEMBLIES AND MONOLITHIC PARTS MADE BY 3D PRINTING METHOD." International Journal of Modern Manufacturing Technologies 13, no. 3 (December 25, 2021): 158–63. http://dx.doi.org/10.54684/ijmmt.2021.13.3.158.
Full textAbstract:
The article presents an analysis of the time-consuming, energy-consuming, and cost-consuming nature of 3D printing a three-dimensional polymer components made in two separate approaches: assembly and monolith structure of various materials (automatic filament change required). The introduction includes the definition of 3D printing, its advantages and examples of practical applications, as well as the reason for undertaking the researches described in the article. The justification of the form of 3D sample models was discussed in detail, as well as the methodology adopted by the authors for comparing the print characteristics and the steps of the printing cycles (print preparation, the course of the printing process and post-processing). A comparison of the materials consumption in the phasess of manual and automatic filament change in the mixer were also described. The test printout was made on the Prusa i3 MK3S printer for filament deposition (FDM or FFF methods). For automatic filament mixing, the Palette 2 Pro device was used. The conclusions also include guidelines for the design and production of models made in one continuous printing cycle (using automatic filament feeding devices). Monolithic elements are less accurate, while elements with replaceable filaments are cheaper, less energy-consuming and the material consumption is lower.
36
Torubarov, I. S., A. V. Drobotov, I. A. Gushchin, D. S. Vdovin, A. L. Plotnikov, and A. A. Yakovlev. "Additive manufacturing of parts with three-dimensional continuous fiber reinforcement." Frontier materials & technologies, no. 2 (2022): 92–104. http://dx.doi.org/10.18323/2782-4039-2022-2-92-104.
Full textAbstract:
One of the key challenges in additive manufacturing of plastic goods using the Fused Filament Fabrication (FFF) technology is to ensure their strength. The low strength of polymer materials and the distinct anisotropy of their mechanical properties limit the use of 3D printing as an alternative to the traditional small-scale production technologies. The most promising solution to the goal of increasing the strength of printed goods is the application of continuous fiber reinforcement. Several additive manufacturing devices and software products that allow preparing a control program for 3D printing with reinforcement are known, however, having all their advantages, they, like conventional printed products, have a wide spread in strength in various directions (in the plane of a layer and perpendicularly to it, in the direction of growing). In this paper, the authors propose using the continuous fiber reinforcement along the three-dimensional trajectories to smooth out the anisotropy of the products’ properties in the FFF technology and ensure wider possibilities for using them in the production of final goods. In the course of work, a 3D printer with the ability to print using five degrees of freedom and software for preparation of control programs were upgraded for the printing process with laying continuous fiber; printing modes with reinforcement were developed; samples were produced for standard static bending tests. The experiments show that reinforcement improves the printed specimen’s strength, and the proposed three-dimensional reinforcement technique ensures the lower flexing strength compared to standard flat reinforcement with uniaxial laying of fibers, though, the destruction of 3D reinforced specimens occurred without evident delamination.
37
Singh, Rupinder. "Metallurgical Affects of Three Dimensional Printing Based Rapid Casting Solution." Materials Science Forum 701 (October 2011): 1–8. http://dx.doi.org/10.4028/www.scientific.net/msf.701.1.
Full textAbstract:
Three dimensional printing (3DP) as rapid casting (RC) solutions has transformed over centuries from black art to science, but the metallurgical impinge on the process responsible for change in mechanical properties (like: surface finish, hardness, dimensional stability etc.) are still disputed. The purpose of the present research paper is to review metallurgical affect of 3DP based RC solution. The result of study suggests that prominent reason found to be responsible for improving the mechanical properties of RC is control of heat transfer rate while solidification (thus reducing dendrite formation).
38
Chen, Tin-Chih Toly, Seung-Kyum Choi, Seung Ki Moon, and Yu-Cheng Wang. "Advanced aircraft manufacturing and maintenance using three-dimensional printing." International Journal of Advanced Manufacturing Technology 105, no. 10 (November 11, 2019): 4055–57. http://dx.doi.org/10.1007/s00170-019-04604-2.
Full text
39
Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
Full textAbstract:
Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
40
Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
Full textAbstract:
Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
41
Bianhong, Li, Qi Wei, and Wu Qiong. "Research progress of carbon materials in the field of three-dimensional printing polymer nanocomposites." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1193–208. http://dx.doi.org/10.1515/ntrev-2022-0051.
Full textAbstract:
Abstract Three-dimensional (3D) printing technology is an additive manufacturing technology designed to rapidly process and manufacture complex geometrical components based on computer model design. Based on a 3D data model, materials are accumulated layer by layer through computer control, and the 3D model is finally turned into a stereoscopic object. Compared with traditional manufacturing methods, 3D printing technology has the advantages of saving man-hours, easy operation, no need for molds, and strong controllability of component geometry. With the development of this technology, according to the core materials and equipment and other elements of the printing molding technology, several types of 3D printing technologies such as fused deposition modeling, selective laser sintering, stereolithography, and solvent cast-3D printing have gradually formed. This review focuses on the principles and characteristics of several of the most representative 3D printing molding processes. And based on carbon nanomaterial (carbon fibers, graphene, and carbon nanotubes) reinforced polymer composite materials, the research progress of different 3D printing molding processes in recent years is reviewed. At the same time, the commercial application of 3D printing molding process in this field is analyzed and prospected.
42
Grover, Chetna, Pankaj Dhawan, and Shivam Singh Tomar. "REDEFINING PROSTHODONTICS WITH 3D PRINTING." International Journal of Advanced Research 9, no. 07 (July 31, 2021): 1093–100. http://dx.doi.org/10.21474/ijar01/13193.
Full textAbstract:
Dentistry is amidst a digital revolution and patients are the definitive recipients of these innovative technological advancements. Three-dimensional (3D) printing is no more considered the future, but isthe reality for daily clinical practice. The term 3D printing, additionally referred as rapid prototyping, is commonly used to depict an additive manufacturing method which adds numerous layers under computerized control in order to create a three-dimensional object. Using this procedure, 3-Dimensional printed restorations, crowns, bridges, surgical guides and implants can be manufactured rapidly with extreme accuracy and precision. The benefits of this innovative technique exceed its drawbacks. 3D printing has prompted a change in digital dentistry with its broad learning, penetrating opportunities and a wide scope of applications. This article will facilitate an understanding of the digital workflow, methods and current uses of 3D printing in prosthetic dentistry.
43
Zolfagharian, Ali, Akif Kaynak, Mahdi Bodaghi, Abbas Z. Kouzani, Saleh Gharaie, and Saeid Nahavandi. "Control-Based 4D Printing: Adaptive 4D-Printed Systems." Applied Sciences 10, no. 9 (April 26, 2020): 3020. http://dx.doi.org/10.3390/app10093020.
Full textAbstract:
Building on the recent progress of four-dimensional (4D) printing to produce dynamic structures, this study aimed to bring this technology to the next level by introducing control-based 4D printing to develop adaptive 4D-printed systems with highly versatile multi-disciplinary applications, including medicine, in the form of assisted soft robots, smart textiles as wearable electronics and other industries such as agriculture and microfluidics. This study introduced and analysed adaptive 4D-printed systems with an advanced manufacturing approach for developing stimuli-responsive constructs that organically adapted to environmental dynamic situations and uncertainties as nature does. The adaptive 4D-printed systems incorporated synergic integration of three-dimensional (3D)-printed sensors into 4D-printing and control units, which could be assembled and programmed to transform their shapes based on the assigned tasks and environmental stimuli. This paper demonstrates the adaptivity of these systems via a combination of proprioceptive sensory feedback, modeling and controllers, as well as the challenges and future opportunities they present.
44
Zhang, Jia Ming, Qinglei Ji, and Huiling Duan. "Three-Dimensional Printed Devices in Droplet Microfluidics." Micromachines 10, no. 11 (November 4, 2019): 754. http://dx.doi.org/10.3390/mi10110754.
Full textAbstract:
Droplet microfluidics has become the most promising subcategory of microfluidics since it contributes numerous applications to diverse fields. However, fabrication of microfluidic devices for droplet formation, manipulation and applications is usually complicated and expensive. Three-dimensional printing (3DP) provides an exciting alternative to conventional techniques by simplifying the process and reducing the cost of fabrication. Complex and novel structures can be achieved via 3DP in a simple and rapid manner, enabling droplet microfluidics accessible to more extensive users. In this article, we review and discuss current development, opportunities and challenges of applications of 3DP to droplet microfluidics.
45
Feng, Yan Sen, Rong Guo Hou, Rui Xiang Niu, Xue Min Wang, and Zhong Liang Zhang. "Design of Intelligent Automatic Annular Three-Dimensional Garage System Based on Micro Control Unit." Advanced Materials Research 462 (February 2012): 452–55. http://dx.doi.org/10.4028/www.scientific.net/amr.462.452.
Full textAbstract:
For purpose of maximum using land utilization and minimum the cost of the parking equipment, a intelligent automatic annular three-dimensional garage system is designed, the major characters of it are multifunction, intelligence and highly automatic, which are obtained by using annular form as the frame structure and micro control unit as the cybernetics core. By using this equipment, the parking labor intensity is relieved; the environment pollution is also controlled
46
Singh, R., and J. P. Singh. "Study of statistically control rapid casting solution of aluminium alloys using three dimensional printing." International Journal of Precision Technology 2, no. 1 (2011): 39. http://dx.doi.org/10.1504/ijptech.2011.038108.
Full text
47
Peng, Bou-Yue, Keng-Liang Ou, Chung-Ming Liu, Shu-Fen Chu, Bai-Hung Huang, Yung-Chieh Cho, Takashi Saito, Chi-Hsun Tsai, Kuo-Sheng Hung, and Wen-Chien Lan. "A Three-Dimensional Bioprinted Copolymer Scaffold with Biocompatibility and Structural Integrity for Potential Tissue Regeneration Applications." Polymers 14, no. 16 (August 21, 2022): 3415. http://dx.doi.org/10.3390/polym14163415.
Full textAbstract:
The present study was to investigate the rheological property, printability, and cell viability of alginate–gelatin composed hydrogels as a potential cell-laden bioink for three-dimensional (3D) bioprinting applications. The 2 g of sodium alginate dissolved in 50 mL of phosphate buffered saline solution was mixed with different concentrations (1% (0.5 g), 2% (1 g), 3% (1.5 g), and 4% (2 g)) of gelatin, denoted as GBH-1, GBH-2, GBH-3, and GBH-4, respectively. The properties of the investigated hydrogels were characterized by contact angle goniometer, rheometer, and bioprinter. In addition, the hydrogel with a proper concentration was adopted as a cell-laden bioink to conduct cell viability testing (before and after bioprinting) using Live/Dead assay and immunofluorescence staining with a human corneal fibroblast cell line. The analytical results indicated that the GBH-2 hydrogel exhibited the lowest loss rate of contact angle (28%) and similar rheological performance as compared with other investigated hydrogels and the control group. Printability results also showed that the average wire diameter of the GBH-2 bioink (0.84 ± 0.02 mm (*** p < 0.001)) post-printing was similar to that of the control group (0.79 ± 0.05 mm). Moreover, a cell scaffold could be fabricated from the GBH-2 bioink and retained its shape integrity for 24 h post-printing. For bioprinting evaluation, it demonstrated that the GBH-2 bioink possessed well viability (>70%) of the human corneal fibroblast cell after seven days of printing under an ideal printing parameter combination (0.4 mm of inner diameter needle, 0.8 bar of printing pressure, and 25 °C of printing temperature). Therefore, the present study suggests that the GBH-2 hydrogel could be developed as a potential cell-laden bioink to print a cell scaffold with biocompatibility and structural integrity for soft tissues such as skin, cornea, nerve, and blood vessel regeneration applications.
48
Thibaut, Bernard. "Three-dimensional printing, muscles, and skeleton: mechanical functions of living wood." Journal of Experimental Botany 70, no. 14 (April 8, 2019): 3453–66. http://dx.doi.org/10.1093/jxb/erz153.
Full textAbstract:
AbstractWood is well defined as an engineering material. However, living wood in the tree is often regarded only as a passive skeleton consisting of a sophisticated pipe system for the ascent of sap and a tree-like structure made of a complex material to resist external forces. There are two other active key roles of living wood in the field of biomechanics: (i) additive manufacturing of the whole structure by cell division and expansion, and (ii) a ‘muscle’ function of living fibres or tracheids generating forces at the sapwood periphery. The living skeleton representing most of the sapwood is a mere accumulation of dead tracheids and libriform fibres after their programmed cell death. It keeps a record of the two active roles of living wood in its structure, chemical composition, and state of residual stresses. Models and field experiments define four biomechanical traits based on stem geometry and parameters of wood properties resulting from additive manufacturing and force generation. Geometric parameters resulting from primary and secondary growth play the larger role. Passive wood properties are only secondary parameters, while dissymmetric force generation is key for movement, posture control, and tree reshaping after accidents.
49
Chen, Xuejun, Shanshan Wang, Jie Wu, Shuwei Duan, Xiaolong Wang, Xiaoxuan Hong, Xiaolu Han, et al. "The Application and Challenge of Binder Jet 3D Printing Technology in Pharmaceutical Manufacturing." Pharmaceutics 14, no. 12 (November 24, 2022): 2589. http://dx.doi.org/10.3390/pharmaceutics14122589.
Full textAbstract:
Three-dimensional (3D) printing is an additive manufacturing technique that creates objects under computer control. Owing to the rapid advancement of science and technology, 3D printing technology has been widely utilized in processing and manufacturing but rarely used in the pharmaceutical field. The first commercial form of Spritam® immediate-release tablet was approved by FDA in 2015, which promoted the advancement of 3D printing technology in pharmaceutical development. Three-dimensional printing technology is able to meet individual treatment demands with customized size, shape, and release rate, which overcomes the difficulties of traditional pharmaceutical technology. This paper intends to discuss the critical process parameters of binder jet 3D printing technology, list its application in pharmaceutical manufacturing in recent years, summarize the still-open questions, and demonstrate its great potential in the pharmaceutical industry.
50
Chou, Wei-Ting, Chuan-Chung Chuang, Yi-Bing Wang, and Hsien-Chung Chiu. "Comparison of the internal fit of metal crowns fabricated by traditional casting, computer numerical control milling, and three-dimensional printing." PLOS ONE 16, no. 9 (September 16, 2021): e0257158. http://dx.doi.org/10.1371/journal.pone.0257158.
Full textAbstract:
This experimental study aimed to compare the internal fit (marginal fit and internal discrepancy) of metal crowns fabricated by traditional casting and digital methods (computer numerically controlled (CNC) milling and three-dimensional [3D] printing). Thirty standard master abutment models were fabricated using a 3D printing technique with digital software. Metal crowns were fabricated by traditional casting, CNC milling, and 3D printing. The silicon replica method was used to measure the marginal and internal fit. A thin layer of low-viscosity polyvinyl siloxane material was placed inside each crown and on the die (like a seat) until the material was set. Replicas were examined at four reference points under a microscope: the central pit (M1), cusp tip (M2), axial wall (M3), and margin (M4). The measured data were analyzed using a one-way analysis of variance (ANOVA) to verify statistical significance, which was set at p < 0.05. In the traditional casting group, the minimum distance measured was at M3 (90.68 ± 14.4 μm) and the maximum distance measured was at M1 (145.12 ± 22 μm). In the milling group, the minimum distance measured was at M3 (71.85 ± 23.69 μm) and the maximum distance measured was at M1 (108.68 ± 10.52 μm). In the 3D printing group, the minimum distance measured was at M3 (100.59 ± 9.26 μm) and the maximum distance measured was at M1 (122.33 ± 7.66 μm). The mean discrepancy for the traditional casting, CNC milling, and 3D printing groups was 120.20, 92.15, and 111.85 μm, respectively, showing significant differences (P < 0.05). All three methods of metal crown fabrication, that is, traditional casting, CNC milling, and 3D printing, had values within the clinically acceptable range. The marginal and internal fit of the crown was far superior in the CNC milling method.