Статті в журналах: "Machining finishing"

1

Fang, J. C., Z. J. Jin, W. J. Xu, and Y. Y. Shi. "Magnetic electrochemical finishing machining." Journal of Materials Processing Technology 129, no. 1-3 (October 2002): 283–87. http://dx.doi.org/10.1016/s0924-0136(02)00666-0.

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2

Farwaha, Harnam Singh, Sehijpal Singh Khangura, and Gurpreet Singh. "Design and Performance of Magnetic Abrasive Finishing Set Up for Finishing of Extended Surfaces." Asian Review of Mechanical Engineering 5, no. 1 (May 5, 2016): 1–4. http://dx.doi.org/10.51983/arme-2016.5.1.2413.

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Some of the materials used in modern industries and industrial applications are difficult to finish with high accuracy and minimal surface defects using conventional machining and polishing techniques. Use of traditional machining techniques for finishing of these materials may lead to various defects like micro cracks, errors in work piece geometry and work piece surface distortions. Due to the these limitations of the traditional machining processes, there was need of new family of machining and finishing methods known as non-traditional or modern machining methods has been developed. Among the various non-traditional processes, magnetic abrasive finishing is one. This process is used to machine and finish material surfaces that are otherwise very difficult to finish. The aim of this research article, To design and develop a Magnetic abrasive finishing set up for finishing of extended plane surfaces and to finish thin sheets (3-5mm), as finishing of thin sheets is difficult by conventional method like grinding due to high temperature generated by large grinding forces.

3

Zhang, Cheng Guang, Y. Z. Hu, and Bo Zhao. "Study on Model of Ultrasonic Polishing Machining - Pulse Electro- Chemical Machining Compound Finishing for the Hard and Brittle Metals." Key Engineering Materials 455 (December 2010): 653–57. http://dx.doi.org/10.4028/www.scientific.net/kem.455.653.

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The application of ultrasonic polishing and machining pulse electrochemical machining compound finishing is presented in the paper. The machining principle and experimental set-up of UPM-PECM compound finishing are introduced in the paper, discussing mechanism and model of the UPM-PECM in theory, and carrying on the experiment, which would co-act on hard-brittle metals in the machining. Furthermore, the material removal depth of UPM-PECM compound finishing is approximately proportional to the polishing time, and would decrease with the polishing time. This study indicates that machining velocity, machining accuracy and surface quality can be improved under UPM-PECM.

4

Edigarov, Vyacheslav, and Evgenii Litau. "Parts finishing antifriction electromechanical machining." Metal Working and Material Science, no. 3 (September 15, 2015): 6–15. http://dx.doi.org/10.17212/1994-6309-2015-3-6-15.

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5

Massarsky, Michael, and David A. Davidson. "Turbo-abrasive machining and finishing." Metal Finishing 95, no. 7 (July 1997): 29–31. http://dx.doi.org/10.1016/s0026-0576(97)87995-0.

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6

Sheng, P. S., and Ko-Wang Liu. "Laser Machining for Secondary Finishing Applications." Journal of Engineering for Industry 117, no. 4 (November 1, 1995): 629–36. http://dx.doi.org/10.1115/1.2803543.

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A laser-based technique for finishing axisymmetric parts is presented which allows the efficient finishing of polymers and ceramics without tool wear, tool breakage, or cutting forces. In this process, a laser beam impinges tangentially onto the surface of a cylindrical workpiece. A flexible machine tool can be developed to grind parts of differing geometries and materials by changing process parameters instead of setups or machines, as well as integrate primary machining and secondary finishing in one machine tool. The precision of laser finishing can be enhanced by using oblique beam impingement angles. Initial results show that Ra values less than 1 μm can be achieved on PMMA workpieces with a fixed beam. This paper presents the elements of the laser machine tool and preliminary results on parametric dependencies for laser finishing of polymer workpieces.

7

Liang, Fu Sheng, Ji Zhao, Shi Jun Ji, and Xin Wang. "Spherical Approximation of Free-Form Surface Closed to a Sphere in Semi-Finishing." Key Engineering Materials 679 (February 2016): 199–206. http://dx.doi.org/10.4028/www.scientific.net/kem.679.199.

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The free-form surface closed to a sphere of brittle material has been used widely, but it is difficult for machining and the efficiency of processing is insufficient. In order to get a product, several processes are needed, such as rough machining, semi-finishing and finishing. Axisymmetric curved surface can take place of the free-form surface in roughing or semi-finishing for wiping off the mass allowance efficiently. Therefore, a spherical approximation algorithm of free-form surface closed to sphere is presented in which free-form surface optical lens will be replaced by a spherical surface in semi-finishing and get the approximate sphere of the free-form surface. It can be certified in the test that this method is simple and reliable. The efficiency and precision in machining is excellent and the distribution of allowance for finishing is uniform in the whole surface, which has great practical significance in machining of optical free-form surface of brittle materials.

8

Li, Xiu Hong, Wen Hui Li, and Sheng Qiang Yang. "Preparation Technology and Surface Finishing Characteristics Research of New Magnetic Abrasive Tools." Key Engineering Materials 522 (August 2012): 21–25. http://dx.doi.org/10.4028/www.scientific.net/kem.522.21.

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According to the fact that the common machining medium used in magnetic abrasive finishing (magnetic abrasive) possessed disadvantages such as high preparation cost, easier to disperse in finishing process, and low utilization and repeat -utilization, this paper puts forward spherical magnetic abrasive of a certain size as magnetic abrasive machining medium, discusses the preparation techniques, establishes the mathematical model of finishing, and analyses the main performance parameter influencing finishing quality and finishing efficiency. Compared with magnetic grinding, spherical magnetic abrasive is not easy to disperse, can be re-used, having long service life and high finishing efficiency and quality. It is a magnetic finishing medium hasing development research value.

9

Pavlushenko, Nellie, Alexandr Bachurin, and Nikolay Ryngach. "Relationship between Quenching Deformations and Machining Allowance." Applied Mechanics and Materials 698 (December 2014): 478–81. http://dx.doi.org/10.4028/www.scientific.net/amm.698.478.

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The amount of finishing machining allowance do not takes into account technological heredity. That may cause form defects in non-rigid high-precision parts. This article describes study of influence of finishing machining allowance value on parts quenching stresses.

10

Liao, Yu Song, and Jiang Han. "Research on Semi-Finishing of NC Milling." Key Engineering Materials 693 (May 2016): 872–77. http://dx.doi.org/10.4028/www.scientific.net/kem.693.872.

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Usually, bigger diameter milling tools were firstly applied in rough machining of NC Milling for improving efficiency and reducing cost before semi-finishing. In order to make the surface of parts more smooth and get accurate dimension parameters and proper shape, it is necessary to select appropriate tools to carry out the finishing of NC Milling. Moreover, higher precision dimension or shapes of parts can be achieve by the method of the semi-finishing, which it can be carried out after rough machining of high efficiency. Currently, the main methods of semi-finishing include semi-finishing of using IPW and semi-finishing of using reference tool.

11

Davoodi, Farideh, Mohammad Taghian, Giuseppe Carbone, Abdollah Saboori, and Luca Iuliano. "An Overview of the Latest Progress in Internal Surface Finishing of the Additively Manufactured Metallic Components." Materials 16, no. 10 (May 21, 2023): 3867. http://dx.doi.org/10.3390/ma16103867.

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Fast progress in near-net-shape production of parts has attracted vast interest in internal surface finishing. Interest in designing a modern finishing machine to cover the different shapes of workpieces with different materials has risen recently, and the current state of technology cannot satisfy the high requirements for finishing internal channels in metal-additive-manufactured parts. Therefore, in this work, an effort has been made to close the current gaps. This literature review aims to trace the development of different non-traditional internal surface finishing methods. For this reason, attention is focused on the working principles, capabilities, and limitations of the most applicable processes, such as internal magnetic abrasive finishing, abrasive flow machining, fluidized bed machining, cavitation abrasive finishing, and electrochemical machining. Thereafter, a comparison is presented based on which models were surveyed in detail, with particular attention to their specifications and methods. The assessment is measured by seven key features, with two selected methods deciding their value for a proper hybrid machine.

12

Nam, Tran Hai, Tran Anh Son, Nguyen Thanh Hai, and Nguyen Tan Phuoc. "Design of 2D Wave Booster Ultrasonic Vibration-Assisted Cutting Tool in Small Size Surface Machining." Key Engineering Materials 923 (June 28, 2022): 75–83. http://dx.doi.org/10.4028/p-ta844x.

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Ultrasonic Vibration-Assisted Machining (UVA) is a machining process that adds a micro-scale high frequency vibration to the motion of a cutting tooltip to interrupt the continuous interaction of tool - workpiece surface. A good point of machining with UVA is more effective than conventional processes such as lower machining forces, higher machining stability, less tool wear and better surface finishes. In molds fabrication with some narrow cavities having a conversion space diameter of less than 3mm will face many difficulties while low surface roughness is required. Low stiffness of technological system in these cases of finishing machining is the reason of a weak machining in high-speed cutting. The ability to achieve cutting speeds for surface finishing of this type in tight spaces is also an interesting application for UVA tools. This paper discusses the finishing machining tool design with UVA for milling machine in such as analyze of the main parameters, adding diagonal split and simulation of the generated vibration effects to evaluate the achieved results before fabrication by using the help of ANSYS.

13

Świercz, Rafał, and Dorota Oniszczuk-Świercz. "Abrasive flow machining of nickel based super-alloys." Mechanik 90, no. 10 (October 9, 2017): 888–90. http://dx.doi.org/10.17814/mechanik.2017.10.137.

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Abrasive flow machining (AFM) is one of the unconventional methods of finishing surface. The material is removed by the flow of pressurized abrasive paste between the machined surfaces. The use of a flexible tool allows for finishing surfaces with complex geometry. The article presents results of experimental investigation on finishing surface topography of nickel-based super-alloys. Samples were pre-treated by electro discharge machining. The results of the study indicate the possibility of significant reduction of surface roughness after EDM with AFM finishing.

14

Montazerolghaem, Hamid, and Esmaeil Soltani. "Design an Apparatus for Obtaining to High Precision Surface of Miniature Parts Based on Magnetized Abrasive Grains Finishing Process." Key Engineering Materials 504-506 (February 2012): 1377–82. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1377.

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Obtaining to high quality surfaces of industrial parts is an important manner for manufacturing involves. Different finishing process are capable to providing the require surface roughness in most cases, considering that, in some special parts, depending on shape, material and dimension of parts, the prevalent methods are limited, especially in finishing of sculptural and curvilinear surfaces. In this research, a new applied apparatus is represented based on magnetized abrasive grains finishing process. In this way, abrasive grains gathering around a rotational cylindrical tool thanks to a permanent magnetic field and work-piece, which usually is a formed thin metal sheet, located on a rotary table. Therefore, coinciding of those motions providing the require machining forces for finishing of surface without any physical contact between tool and work-piece. Presented process may carry out dry and wet in case of changing the main machining parameters such as: material and size of abrasive grains, tool and work-piece surface gap distance, tool and/or table rotational speed (r.p.m) and work-piece material. The recommended process has remarkable advantages such as: non-contact surface finishing, high finishing of non-flat surfaces, no need to clamping for work-piece because of low machining forces, responsibility for finishing of a wide range of materials except magnetizable parts, low machining costs and easy set up. This method has a lot of applications in production of optical lens, orthopedic prosthetic components and jewellery. For approve of the designed apparatus advantages, relative to other existed MR fluid machining system, some samples of very thin complex formed sheet have been successfully polished.

15

Ge, Pei Qi, and Jian Long Zhang. "Experimental Research on Rolling Bearing Raceway Finishing." Advanced Materials Research 797 (September 2013): 432–37. http://dx.doi.org/10.4028/www.scientific.net/amr.797.432.

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The machining quality of rolling bearing raceway has an important impact on bearing life. In this paper, the finishing experiment equipment of rolling bearing raceway is built and the mechanical and electrochemical mechanical experiments are conducted. The impact of clearance between cathode and workpiece, the rotation speed and the abrasive grain size on electrochemical mechanical machining quality is analyzed. The surface roughness decreases from Ra0.20μm to Ra0.04μm through electrochemical mechanical machining. The surface morphology of workpiece after finishing is observed. Contrast with the surface morphology after conventional mechanical polishing, the surface after electrochemical mechanical finishing is more suitable to the bearing raceway.

16

Bu, Xiao Fei, Hu Lin, and Long Chen. "Smooth Cutting Operation Strategy for High Finishing Machining." Advanced Materials Research 875-877 (February 2014): 896–900. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.896.

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High finishing machining tool path generation methods are usually adopted for five-axis computer numerically controlled machining of sculptured surface parts. The quality of the high finishing machining has an important effect on that of the surface. In this paper, a high finishing machining tool path generation method is introduced to generate an optimal tool path. The initial tool path is firstly created based on the constant scallop height, then the derived tool paths are generated as a kind of the diagonal curve by the initial tool path, and at last, the tool path smoothing algorithm is applied to the generated tool path. This path algorithm can ensure higher level of smooth of the surface been machined. Finally, the results of simulation and experiment of the machining process are given to verify the smooth and applicability of the proposed method.

17

Onishi, Takashi, Kazuhito Ohashi, Kohei Higashi, Yohei Morinaka, Shinichi Banno, Takakazu Kitagawa, and Shinya Tsukamoto. "In-Process Monitoring of the Machining State in Superfinishing by Measuring the Dynamic Machining Forces." Advanced Materials Research 1136 (January 2016): 592–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1136.592.

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Superfinishing is widely used as a final finishing method for sliding surfaces of bearings. In superfinishing, a fine finished surface can be obtained by transiting the machining states from the cutting action to the finishing one as the tool loading is encouraged. To obtain good machining conditions, it is necessary to judge the transition of the machining state reliably. However, it is difficult to judge the transition of the machining states. In this study, we focused on the change of the dynamic component of the machining force, which was applied to the oscillation direction of the superfinishing stone, during machining process. With machining experiments, the relationship between the declination of the dynamic machining force and the transition of the machining state was confirmed.

18

Haas, Franz, Philipp Zopf, and Jörg Edler. "Progress in Titanium Machining." Materials Science Forum 879 (November 2016): 659–64. http://dx.doi.org/10.4028/www.scientific.net/msf.879.659.

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Milling and drilling of titanium alloys represent a key technology for the aircraft manufacturers. The balancing act between production costs and tool costs leads to the need of tests and an optimized setup of the whole process. A Styrian consortium with experts in materials, tools and machining has been formed to extend the tool life in machining of titanium alloys. A series of tests is set up to evaluate the roughing and finishing operations. For finishing operations ultrasonic assisted milling is introduced and compared with conventional milling. Force measurement and optical wear detection are used for tool characterization.

19

Yin, Feng Ling, Bing Quan Huo, and Li Gong Cui. "Software Function Design for Measurement and Control System of a Magnetorheological Machine Tool." Advanced Materials Research 926-930 (May 2014): 1408–11. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1408.

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In order to improve the machining accuracy of workpieces, we developed the magnetorheological finishing system. Taking the measurement and control system of the magnetorheological finishing system as the research target, we introduced the overall function design of the measurement and control system firstly, and then introduced the function of each module, including the multi-module control for circulatory system, parameter setting for the circulatory system, condition monitoring for the circulatory system, ribbon calibration, tool setting, anti-collision control of the finishing wheel and finishing spots collection. The developed measurement and control system of the magnetorheological finishing system can effectively guarantee the high-precision machining of machine tools.

20

Wu, Long, Aimin Wang, and Wenhao Xing. "Offline Feed-Rate Scheduling Method for Ti–Al Alloy Blade Finishing Based on a Local Stiffness Estimation Model." Metals 13, no. 5 (May 19, 2023): 987. http://dx.doi.org/10.3390/met13050987.

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In the aerospace field, Ti–Al alloy thin-walled parts, such as blades, generally undergo a large amount of material removal and have a low processing efficiency. Scheduling the feed rate during machining can significantly improve machining efficiency. However, existing feed-rate scheduling methods rarely consider the influence of machining deformation factors and cannot be applied in the finishing stages of thin-walled parts. This study proposes an offline feed-rate scheduling method based on a local stiffness estimation model that can be used to reduce machining errors and improve efficiency in the finishing stage of thin-walled parts. In the proposed method, a predictive model that can rapidly calculate the local stiffness at each cutter location point and a cutting-force prediction model that considers the effect of cutting angle are established. Based on the above model, an offline feed-rate scheduling method that considers machining deformation error constraints is introduced. Finally, an experiment is performed by taking the finishing of actual blade parts as an example. The experimental results demonstrate that the proposed feed-rate scheduling method can improve the machining efficiency of parts while ensuring machining accuracy. The proposed method can also be conveniently applied to feed-rate scheduling in the finishing stage of other thin-walled parts without being limited by machine tools.

21

Pa, Pai Shan. "Performance Assessment of Surface Finishing Using Completely Inserted Module of Female-Screws." Materials Science Forum 628-629 (August 2009): 647–50. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.647.

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It is very difficult to execute the finishing process of the concavo-convex surface of female-screws. The current study offers a screw-form design electrode and a new area-finishing process using an ultrasonic generator. The ultrasonic energy generated is transmitted into the electrolyte to assist the process of electrochemical finishing. The surface of female-screws is electrochemically finished by different types of completely inserted electrodes and put through both continuous and pulsed direct current as a finishing operation. For inserted screw-form electrodes, a smaller circumference electrode on the cylinder provides more sufficient discharge space, which is advantageous for finishing. Pulsed direct current can promote the effect of electrochemical finishing, but the machining time is longer and the cost is raised. The average ultrasonic effect is much better than the pulsed current while the machining time needs not be prolonged by the off-time. The higher current density and higher current rating with ultrasonic assistance can avoid the difficulty of dreg discharge, thus reducing the finishing time. It is a great contribution that the ultrasonic-assistance electrochemical finishing after screw machining requires a shorter time than manual or machine polishing to make the surface of female screws smooth and bright.

22

Wu, Yu Hou, Hui Jie You, De Hong Zhao, and Yan Liu. "CNC Machining and Simulation for Relief of Special-Shaped Stone." Advanced Materials Research 468-471 (February 2012): 69–73. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.69.

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Use special-shaped stone turn-milling machining center (HTM50200) to achieve the production of complex relief. Through the ArtCAM establish the three dimensional relief model of Riverside Scene at Qingming Festival. Analysis of blank material characteristics and features of NC machining center, select the appropriate tool, calculate cutting depth 、cutting speed 、feed rate 、spindle speed and other process parameters by formulas. With ArtCAM/CAM module to make process of the preparation of the rough finishing, the semi-finishing and finishing, and then generate the tool path file. Simulation in VERICUT can optimize the potential collision, over-cutting and owe cut of the machining process, and the adoption of special-shaped stone machining center for milling to finalize production of the relief, summarize the experience in special-shaped stone processing.

23

Lo, Jie Shing, Chang Tai Jiang, and Kun Ling Wu. "Effect of slotted electrodes on improvement in machining performance of large-scale electrical discharge machining." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 3 (January 10, 2018): 756–65. http://dx.doi.org/10.1177/0954405417752528.

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Under special conditions, electrical discharge machining is prone to experiencing poor machining removal rate. This creates debris deposits that lead to decreased machining efficiency and poorer machining quality in the machining workpieces during machining operations. Thus, the present study investigated the use of slotted electrodes to improve machining debris removal and compared the machining capability of such electrodes with that of cylindrical, nonslotted electrodes. Concurrently, oscilloscopes were used to measure the machining voltage and current signals during the machining process, in which waveforms were analyzed to gain insight into the electrical discharge condition of the electrical discharge machining. Compared with general cylindrical, nonslotted electrodes, the deep slotted electrodes improved the material removal rate on large-scale and hemisphere electrical discharge machining result by 91% and 116.7%, respectively. The experiment results also show that slotted electrodes are inapplicable to finishing operations. Therefore, during roughing operations, slotted electrodes should be used to lower machining time; during finishing operations, cylindrical, nonslotted electrodes should be used to adjust machining precision.

24

Yuan, Feng. "Numerical Simulation of Whole Impeller for 5-Axis Machining Based on UG." Applied Mechanics and Materials 16-19 (October 2009): 124–29. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.124.

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The manufacturing template of whole impeller 5-axis machining based on UG was re-developed with NURBS interpolation principle and UG/knowledge fusion technology, and 5-axis NC machine and part model were established, each parts of machine were simulated in 3D motion with reading NC code. Human-computer interaction was processed fast with the template and guiding of digitized manufacturing, the cutting tracks of half-finishing machining and finishing machining for whole impeller were produced fast. The template involves 3-D modeling, craft flow programming of NC machining, program of NC machining and etc. and is tested on 5-axis NC machine, it is indicated that the scheme and program of NC machining for whole impeller is feasible.

25

Zhang, Cheng Guang, Xue Ling Yang, and Bo Zhao. "Experimental Research on Ultrasonic Assisted Pulse Electrochemical Compound Finishing for Hard and Brittle Metal." Applied Mechanics and Materials 42 (November 2010): 170–74. http://dx.doi.org/10.4028/www.scientific.net/amm.42.170.

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The experiment of ultrasonic assisted pulse electrochemical compound finishing is carried in this paper. The machining principle of the compound finishing is discussed in this paper. Processing experiments of compound finishing are carried out to study the effects of the main processing para- meters, including the particle size, the ultrasonic vibration amplitude, the minimum gap between the tool head and workpiece and the pulse voltage, on the material removal rate and the surface quality for hard and brittle metal materials. The curves of the corresponding relationships are also obtained. The study indicates that the processing velocity, machining accuracy and surface quality can be improved under the compound finishing, obtaining the processing technology conductions of the compound finishing. Introductions

26

Kang, Gui Wen, and Fei Hu Zhang. "Research on Material Removal Mechanism of Magnetorheological Finishing." Materials Science Forum 532-533 (December 2006): 133–36. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.133.

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Magnetorheological finishing (MRF) is a novel precision optical machining technology. MRF utilizes magnetic particles, nonmagnetic polishing abrasives in carrier fluid, and a magnetic field to finish optical materials. Owing to its flexible finishing process, MRF eliminates subsurface damage, corrects surface figure errors and the finishing process can be easily controlled by computer. To achieve deterministic finishing, it’s necessary to know the mechanism of material removal. Different magnetorheological fluids are used to finish optical glass on the same machining condition. The material removal and surface quality are examined after finishing with no polishing abrasive, aluminium oxide and cerium oxide. The results show that the hardness of polishing abrasive is not the main factors to affect material removal.

27

Hnátík, Jan, Luboš Kroft, and Katerina Bícová. "The Influence of Finishing Strategy on the Quality of Surface." Materials Science Forum 919 (April 2018): 18–24. http://dx.doi.org/10.4028/www.scientific.net/msf.919.18.

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The present contribution focuses on finishing operations in machining. Finishing operations belong to the most time-consuming and surface quality-critical machining tasks. High-quality tools are available nowadays for choosing optimal tool paths for finishing. Yet, the finishing options for general shaped surfaces are still severely limited. Although CAM systems can efficiently generate tool paths, none of them offers the combination of finishing tool paths, modern productive methods and adaptive tool paths. Increasing the productivity while maintaining dimensional accuracy and the quality of finished surfaces is the key point in finishing. One of the ways to improving productivity is the use of constant cutting speed. The aim of this article is to present experimental verification of these assumptions and demonstrate the impact on the quality of the finished surface

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Li, Chang He, Ya Li Hou, Yu Cheng Ding, and Bing Heng Lu. "Power Spectral Density and Cross Correlation Function Analysis of Finished Surface by Abrasive Jet with Grinding Wheel as Restraint." Key Engineering Materials 416 (September 2009): 300–305. http://dx.doi.org/10.4028/www.scientific.net/kem.416.300.

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The abrasive jet finishing process with wheel as restraint is a kind of compound precision finishing process that combined grinding with abrasive jet machining, in which inject slurry of abrasive and liquid solvent to grinding zone between grinding wheel and work surface under no radial feed condition when workpiece grinding were accomplished. The abrasive particles are driven and energized by the rotating grinding wheel and liquid hydrodynamic pressure and increased slurry speed between grinding wheel and work surface to achieve micro removal finishing.In the paper,the finished surface morphology was studied using Scanning Electron Microscope (SEM) and microscope and microcosmic geometry parameters were measured with TALYSURF5 instrument respectively. According to the metrical results, the surface topographical characteristics were evaluated with correlation function and PSD (Power Spectral Density) of random process about machined surface before and after finishing. The results show that longitudinal geometry parameter values of finishing machining surface were diminished comparing with ground surface,and the mean ripple distance was decreased and, ripple and peak density were increased. Furthermore, the finished surface has little comparability compared to grinding machining surface.The isotropy surface and uniformity veins at parallel and perpendicular machining direction were attained by abrasive jet precision finishing with grinding wheel as restraint and the surface quality is improved obviously.

29

Ochi, Yuzuha, Masatoshi Usui, and Hiroyuki Sasahara. "Influence of Reverse Finishing on Characteristics of Drilling Surface." International Journal of Automation Technology 18, no. 3 (May 5, 2024): 332–41. http://dx.doi.org/10.20965/ijat.2024.p0332.

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Aluminum alloys are often used in automobile and aircraft parts that require higher dimensional accuracy and durability. Drilling is often used in the machining process of these products and accounts for about 60% of the machining performed on these products. Deterioration of finishing surface accuracy in drilling causes problems such as decreased tool life due to wear and increased cost due to the introduction of the finishing process. The objective of this study is to evaluate the finished surface characteristics in the drilling of aluminum alloys using reverse finishing, with a focus on the cutting direction of finishing, with respect to the roughing direction. The torque and thrust force are smaller in reverse finishing than in forward finishing. The reduction effects of cutting force in reverse finishing were more significant when the finishing depth of cut was smaller in relation to the roughing-affected layer. Under conditions where the finishing depth was equal to or greater than the roughing-affected layer, it was possible to reduce cutting forces and improve surface roughness while obtaining compressive residual stresses equivalent to forward finishing.

30

Hara, Keisuke, Hiromi Isobe, Shuichi Chiba, and Keiko Abe. "A Study of Ultrasonically Assisted Fly Cutting for High Precision Machining Hard Brittle Materials." Advanced Materials Research 126-128 (August 2010): 252–57. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.252.

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This paper describes ultrasonically assisted fly cutting for finishing advanced ceramics for hot-press dies used to fabricate glass lenses. Fly cutting can perform shallow machining, which realizes ductile-mode cutting of hard, brittle materials. Ultrasonically assisted machining can increase the critical cutting depth (i.e., the maximum cutting depth for ductile-mode machining of a surface). The technique proposed in this paper combines both techniques and enables precise finishing of advanced ceramics at a high machining efficiency. Ultrasonic assisted fly cutting was found to reduce tool fracture and improve the finished surface quality compared with conventional fly cutting.

31

Fu, Yi, Xin Sheng He, Chun Fu Gao, Chu Xiong Xie, and Peng Huang. "Study on the Mechanism and Tool of the Uniform ER Finishing with Changeable Removal Rate Model of Free-Form Surface." Advanced Materials Research 602-604 (December 2012): 1984–88. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1984.

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At present, the finish machining process of workpiece with free-form surface has the disadvantages of complex trajectory planning, low machining efficiency and precision. To solve these problems, an idea of uniform ER finishing with changeable removal rate model is proposed in this paper. The rheological effect of ER fluid is used to change the magnetic field distribution in finishing areas; then the finishing pressure distribution is changed, that makes the material removal rate of every point in the contact area be approximately equal, so the aim of uniform removal is achieved. In this paper, the quantitative relationship between electric field intensity and finishing pressure is studied. Contrast experiments of finishing and removal effects are performed under the different conditions of electric field distribution. The ER finishing equipment is developed and the proposed finishing method is feasible and has the potential of obtaining the ultra precision.

32

Pa, Pai Shan. "Design of Synchronous Processes of Rolling-Leveling and Ultrasonic Electrochemical Finishing of Holes." Advanced Materials Research 83-86 (December 2009): 785–92. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.785.

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A new finishing method of holes that uses an effective electrode and a nonconductive roller to execute the design of synchronous processes of ultrasonic electrochemical finishing and rolling-leveling is investigated. The submitted processes can be used among the traditional techniques of various holes machining. Through simple equipment attachment, ultrasonic electrochemical finishing and rolling-leveling can follow to execute the finishing process on the same machine. Among the factors affecting finishing processes, the performance of rolling-leveling combined with ultrasonic electrochemical finishing is primarily discussed. In the experiment, the electrode is used with continuous and pulsed direct current. The controlled factors include roller material, roller geometry, chemical composition and concentration of the electrolyte, and flow rate of electrolytes. The experimental parameters are frequency and power level of ultrasonics, feed rate of electrode and roller, rotational speed of the finish-tool, die material, electrical current rating, and pulsed period. The design of the synchronous processes through rolling-leveling is the most influential parameter in this study. An adequate finish-tool rotational speed produces better finishing. The average effect of the ultrasonic is better than the pulsed current while the machining time needs not to be prolonged by the off-time. An effective and low-cost finishing process through the ultrasonic electrochemical finishing and using the rolling-leveling assistance after the process of traditional holes machining make the surface of the holes smooth and bright is presented.

33

Xieeryazidan, Adayi, Muhetar Wumerhali, and Gui Bing Pang. "On Technologies of Electrochemical Finishing with Pulsed Current." Key Engineering Materials 522 (August 2012): 41–46. http://dx.doi.org/10.4028/www.scientific.net/kem.522.41.

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Electrochemical finishing with pulsed current (ECFP) is introduced in this paper. The main process parameters, such as electric parameter and inter-electrode gap, etc., were investigated. The results show that the ECFP is an effective finishing method for improving the machining quality as the result of the machining mechanism. The related experimental results show that the obtained surface quality and dimensional accuracy are improved significantly as the result of the application of the pulsed current. Moreover, machining quality is increased with shorter pulses.

34

Liu, Jiangnan, and Yanhua Zou. "Study on Elucidation of the Roundness Improvement Mechanism of the Internal Magnetic Abrasive Finishing Process Using a Magnetic Machining Tool." Journal of Manufacturing and Materials Processing 7, no. 1 (February 13, 2023): 49. http://dx.doi.org/10.3390/jmmp7010049.

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The magnetic abrasive finishing process using the magnetic machining tool was proposed to finish the internal surface of the thick tube (the thickness of the tube is 5~30 mm). It has been proved that this process can improve the roundness while improving the roughness. In this paper, we mainly study the machining mechanism of roundness improvement. Firstly, the influence of finishing characteristics on the roundness improvement was discussed, including the rotational speed of the magnetic machining tool and the rotational speed of the tube. It was concluded that the roundness improvement increases with the increase in the rotational speed through the analysis of finishing force and finishing times. Furthermore, the influence on roundness improvement of different distributions of magnetic particles were experimentally compared. After finishing, due to the magnetic force generated by the magnetic machining tool and the magnetic pole unit exerting pressure on the magnetic particles, a fixed magnetic brush is formed. The experimental results show that the circumferential length of the fixed magnetic brush is different due to the different distribution areas of magnetic particles. It was concluded that the roundness improvement increases with the circumferential length of the fixed magnetic brush increases by discussing the relationship between the circumferential length of the fixed magnetic brush and the wavelength of the roundness curve. When the circumferential length of the fixed magnetic brush is 76 mm, the roundness was improved from 379 μm to 236 μm after 60 min of finishing.

35

Luo, Song Bao, Hui Yang, Jian Ming Zhang, and Chang Tao Pang. "The Current State and Development Trends of Deterministic Ultraprecision Optical Surfaces Machining Technology." Key Engineering Materials 364-366 (December 2007): 351–57. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.351.

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The deterministic ultraprecision machining achieves accuracy and repeatability not possible using conventional optical machining techniques, greatly enhances product quality, providing a quantum leap in throughput, productivity, yield, and cost effectiveness. The deterministic ultraprecision machining technology, involving various ultraprecision process from turning, flycutting, grinding and polishing to finishing, is usually referred to the following technologies such as single point diamond turning (SPDT), deterministic microgrinding (DMG), magneto-rheological finishing (MRF),computer controlled polishing (CCP), and computer controlled optical surfacing(CCOS),etc. This paper discusses mainly the current state and development trends of the deterministic ultraprecision machining technologies at home and abroad. In addition, the paper also elaborates on the technical features of the various deterministic machining technologies mentioned.

36

Li, Chang He, Ling Yun Qi, and Hua Yang Zhao. "Application and Development of High-Efficiency Abrasive Finishing." Advanced Materials Research 189-193 (February 2011): 3113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3113.

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High-efficiency abrasive machining is one of the important technology of advanced manufacture. Combined with raw and finishing machining, it can attain high removal rate like turning, milling and planning. The difficult-to-grinding materials can also be ground by means of this method with high performance. In the present paper, development status and latest progresses on high efficiency abrasive machining technologies relate to high speed and super-high speed grinding, high efficiency deep-cut grinding, hard and brittle materials high-efficiency grinding, powerful grinding and belt grinding were summarized. The efficiency and parameters range of these abrasive machining processes were compared. The key technologies of high efficiency abrasive machining, including grinding wheel, spindle and bearing, grinder, coolant supplying, installation and orientation of wheel and workpiece and safety defended, as well as intelligent monitor and NC grinding were investigated.

37

Zou, Yan Hua, Jiang Nan Liu, and Takeo Shinmura. "Study on Internal Magnetic Field Assisted Finishing Process Using a Magnetic Machining Jig for Thick Non-Ferromagnetic Tube." Advanced Materials Research 325 (August 2011): 530–35. http://dx.doi.org/10.4028/www.scientific.net/amr.325.530.

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This paper describes an internal finishing process for thick non-ferromagnetic tube (10~20 mm in thickness) by the application of a magnetic field-assisted machining process using a magnetic machining jig (permanent magnet tool). In this study, a new automatic inner surface finishing system was developed, and to achieve smooth surface roughness and high form accuracy, a multiple-stage machining which contains of rough machining and precision finishing was carried out. Especially, in order to improve the form accuracy the rough processing time was made longer compared with the research in the past. The experiments were performed for a thick SUS304 stainless steel tube 10 mm in thickness. The results showed that surface-roughness and form accuracy were able to be improved greatly, the initial surface roughness of 4.9μmRa can be improved to 0.01 μmRa and the roundness of inside tube can be improved from 206 μm to13μm.

38

Zhou, Zhenfeng, Xu Sun, Yanzhen Yang, and Yongjian Fu. "A Study on Using Magnetic Abrasive Finishing with a 6-Axis Robot to Polish the Internal Surface Finishing of Curved Tubes." Coatings 13, no. 7 (June 30, 2023): 1179. http://dx.doi.org/10.3390/coatings13071179.

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This study proposed a new magnetic abrasive finishing (MAF) method, in which a 6-axis robot with a magnetic machining tool was used to polish the inner surfaces of curved tubes. We have also developed a magnetic machining tool jig, which can be fixed at the front of the 6-axis robot, rotating freely and suitable for polishing the inner surfaces of curved tubes. In this study, we focused on investigating the machining parameters in the initial machining stage and precision finishing stage. Based on the characteristics of machining parameters, a multi-stage MAF process was conducted to obtain an inner surface with high quality and high efficiency. The experimental results showed that both the roughness Ra and Rz of inner surface in the initial machining stage significantly decreased with the increase in the mixed magnetic abrasives, to as low as less than 20 nm Ra in the precision finishing stage when the machining parameters were appropriately adjusted. In addition, the roughness Ra of inner surface could be further reduced to less than 10 nm Ra in the multi-stage MAF process. Finally, the magnetic flux density cloud map and the magnetic field line distribution map were analyzed in Ansys Maxwell.

39

Dąbrowski, Tomasz, Dariusz Kurczyński, Piotr Łagowski, and Michał Warianek. "The influence of the brake pad surface machining and finishing on its friction performance- examined by inertia brake dynamometr testing." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 399–404. http://dx.doi.org/10.24136/atest.2018.101.

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The article describes the influence of brake pads surface machining and finishing on their friction characteristics. It shows the methods of machining and finishing of the brake pads surface and their influence on noise emission and performance. It shows the brake dynamometer test results obtained on three brake pads which have three different types of surface modification and their detailed analysis and comparison.

40

Kang, Gui Wen, and Fei Hu Zhang. "Research on Material Removal of Magnetorheological Finishing." Key Engineering Materials 329 (January 2007): 285–90. http://dx.doi.org/10.4028/www.scientific.net/kem.329.285.

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Magnetorheological finishing (MRF) is a novel precision optical machining technology. Owing to its flexible finishing process, MRF can eliminate subsurface damage, smooth rms micro roughness and correct surface figure errors. The finishing process can be easily controlled by a computer. Material removal model in MRF is established. According to Preston equation in optical machining, mathematic model of material removal rate in MRF rotating at fixed rate is established through hydrodynamic analysis of the MR fluid flow in the polishing zone. The validity of the model is examined by the experimental results.

41

Morais, Helder, Amir Baraati, Fernando Carlos, Erika Davim, and Ricardo Torcato. "Development of a CNC Grinding Process for the Manufacturing of Crystal Glass Products." Key Engineering Materials 957 (October 2, 2023): 3–11. http://dx.doi.org/10.4028/p-g5vmbe.

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Traditional manufacturing and finishing operations of crystal products use intensive specialized labour resulting in high cycle times and production costs. It is intended to investigate the applicability of automated finishing technology, namely grinding in a CNC machining centre, with consideration of material’s characteristics and geometric variability to crystal processing. A case study will be presented, involving cutting tools development, cutting parameters optimization, CAM programming of machining strategies and toolpaths, product clamping systems and finally product machining and quality control that is being implemented at Vista Alegre Atlantis company.

42

Pa, P. S. "A Magnetic-Assistance System as a Super Finishing Following Turning Machining." Advanced Materials Research 683 (April 2013): 937–40. http://dx.doi.org/10.4028/www.scientific.net/amr.683.937.

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A design system using a magnetic force with high efficiency to assist discharging dregs out of the electrode gap during the electrochemical finishing on the surface finish process that follows turning machining process is investigated in the current study. Through the equipment attachment, magnetic-assistance during electrochemical finishing can follow the turning process on the same machine. This process can be used for various turning operations. Among the factors affecting electrochemical finishing, the magnetic-assistance is primarily discussed. The experimental parameters are magnetic strength, distance between the two magnets, current rating, on/off period of pulsed current, feed rate of workpiece, and rotational speed of workpiece. A higher current rating with magnetic-assistance reduces the finishing time and avoids the difficulty of dreg discharge. Providing a large magnetic field intensity or using a small distance between the two magnets produces a larger magnetic force and discharge ability and better finishing. A large rotational speed of the workpiece and electrode produces better finishing. Pulsed direct current can slightly promote the effect of electrochemical finishing, but the current rating needs to be increased. The magnetic-assistance during the electrochemical finishing process makes a great contribution in a short time by making the surface of the workpiece smooth and bright.

43

Pa, Pai Shan. "Compound Finish Processes Using Burnishing and Ultrasonic Electrochemical Finishing on Hole-Wall Surface." Advanced Materials Research 53-54 (July 2008): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.3.

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This study using ultrasonic energy transmitted into the electrolyte to assist in discharging of electrolytic product out of the machining gap in the compound finishing processes of electrochemical finishing and burnishing on hole-wall surface beyond traditional process of holes machining instead of conventional hand or machine polishing. The design finish-tool includes a burnishing-tool and an electrode as a hole-wall surface finish improvement that goes beyond traditional rough boring. In the experiment, the finish-tool travels across the hole-wall surface with continuous or pulsed direct current. The experimental results show that the large supply of current rating is effectively to reach the amount of the material removal and is advantageous to the finishing processes. The average effect of the ultrasonic is more better than the pulsed current while the machining time needs not to be prolonged by the off-time. The finish effect is better with a high rotational speed of the finish-tool because the dregs discharge of electrochemical finishing becomes easier and is also advantageous to the finish. The compound processes of burnishing and ultrasonic electrochemical finishing just require a short time to make the hole-wall surface smooth and bright.

44

Salacinski, T., T. Chmielewski, M. Winiarski, R. Cacko, and R. Świercz. "Roughness of Metal Surface After Finishing Using Ceramic Brush Tools." Advances in Materials Science 18, no. 1 (March 1, 2018): 20–27. http://dx.doi.org/10.1515/adms-2017-0024.

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AbstractThe paper describes processes of metal parts edges deburring and surface of metal samples polishing with ceramic tools based on fibre aluminium oxide. It presents the construction of basic types of tools and their practical industrial applications, and evaluates the influence of machining parameters on surface roughness. An important advantage of the used tools is the possibility of deburring and machining of external flat and shaped surfaces as well as internal surfaces and even deep drilled holes. These tools can be practically used for machining all construction materials. The results of machining of selected engineering materials, such as aluminium 5052 and 2017A, Inconel 718, non-alloy steel, in various variants of machining parameters are presented. The influence of machining parameters on machined surface roughness was described.

45

Xiao, Shan Hua, Wen Chao Zhou, and Gui Xing Fu. "Five-Axis Machining and Impeller Vericut Simulation Optimization." Applied Mechanics and Materials 401-403 (September 2013): 155–58. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.155.

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Analysis impeller axis CNC machining process and processing content, applications Master CAM X6 software to generate a five-axis roughing trajectory of the impeller, the impeller expansion tank and wheels finishing trajectory, blade finishing trajectory. Vericut simulation software tool set, add the tool library, add rough, add impeller machining CNC program, set collision and interference color display, program optimization parameters, simulation of collision-free, without undercutting the five-axis impeller.

46

Sajgalik, Michal, Tatiana Czanova, Lucia Zauskova, Mario Drbul, Marek Sadilek, and Jan Valicek. "Triaxial analysis of residual stress in surface layers after high feed machining using X-ray diffractometer." MATEC Web of Conferences 157 (2018): 07012. http://dx.doi.org/10.1051/matecconf/201815707012.

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Continuously increasing of productivity is main cause of finding of new ways and methods of machining. High feed machining (HFM) is one of methods of high-productivity machining developed to achieve higher metal removal rates and decrease machining time. Each machining or treatment operation introduces residual stress into the material and its surface layers. Roughing methods of machining generate tensile residual stress obviously. Tensile character of residual stress is not suitable for functional properties of produced parts. In some cases, finishing methods of machining can improve residual stress to suitable character. New detection method of residual stress by applying of x-ray diffraction allows to measure residual stress as triaxial tensor and distribution of residual stress. When we know analyse the residual stress thoroughly, we can design right finishing method and so improve the character of residual stress. This article is focused on analysing given measuring method of residual stress in triaxial direction and next possibilities of their eventual improvement.

47

Lukovics, Imrich, and Jiří Čop. "Finishing Methods of Tools Functional Surfaces." Key Engineering Materials 581 (October 2013): 18–21. http://dx.doi.org/10.4028/www.scientific.net/kem.581.18.

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Article shows the calculation of the stress in a rotating disc and the possibility of using proprietary forms of instruments for speed grinding. It presents the results of speed and efficient cutting tools in machining these materials alloyed with chromium. In addition, it notes the results of the influence of technological conditions on the quality of surfaces, the residual stress in the workpiece, resulting from the machining speed and the influence of technological conditions on the wear of grinding wheels. Finally, some options for the use of finishing techniques in practice are mentioned.

48

Iwai, Manabu, and Kiyoshi Suzuki. "Surface Finishing of Electrically Conductive Diamond Tools by Electrolytic Machining." Advanced Materials Research 565 (September 2012): 400–405. http://dx.doi.org/10.4028/www.scientific.net/amr.565.400.

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This paper deals with a new surface finishing method of electrically conductive diamond materials by making efficient use of an electrically conductive nature of the workpiece material, instead of conventional methods such as grinding, lapping and polishing using diamond abrasives. The authors focused on the electrolytic machining method and not on the electro discharge machining method for the two advantageous features of the electrolytic machining in addition to the general view that a better surface roughness could be obtained. One of those features is that no higher heat is generated at the machining point. This can eliminate a risk of the film delamination in the case where a workpiece is the CVD diamond coated tool. The other is that a wider machining gap is available between an electrode and a workpiece. This was thought to allow the electrolytic machining to be applied to a tool with a complex shape such as a drill and an endmill. Based on these concepts, electrolytic machining experiments were conducted on the electrically conductive diamond materials. From the results, it was found that the surface of the electrically conductive diamond could be smoothened enough by electrolytic machining though relatively long period of time was required.

49

Fountas, Nikolaos A., and Nikolaos M. Vaxevanidis. "Optimization of Abrasive Flow Nano-Finishing Processes by Adopting Artificial Viral Intelligence." Journal of Manufacturing and Materials Processing 5, no. 1 (March 8, 2021): 22. http://dx.doi.org/10.3390/jmmp5010022.

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This work deals with the optimization of crucial process parameters related to the abrasive flow machining applications at micro/nano-levels. The optimal combination of abrasive flow machining parameters for nano-finishing has been determined by applying a modified virus-evolutionary genetic algorithm. This algorithm implements two populations: One comprising the hosts and one comprising the viruses. Viruses act as information carriers and thus they contribute to the algorithm by boosting efficient schemata in binary coding to facilitate both the arrival at global optimal solutions and rapid convergence speed. Three cases related to abrasive flow machining have been selected from the literature to implement the algorithm, and the results corresponding to them have been compared to those available by the selected contributions. It has been verified that the results obtained by the virus-evolutionary genetic algorithm are not only practically viable, but far more promising compared to others as well. The three cases selected are the traditional “abrasive flow finishing,” the “rotating workpiece” abrasive flow finishing, and the “rotational-magnetorheological” abrasive flow finishing.

50

OHASHI, Kazuhito, Shinya TSUKAMOTO, and Toshikatsu NAKAJIMA. "Cavitation Aided Machining for Finishing Glass Surface." Proceedings of the JSME annual meeting 2003.4 (2003): 303–4. http://dx.doi.org/10.1299/jsmemecjo.2003.4.0_303.

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