Готові списки джерел за темами / Micro forming process

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Автор: Grafiati
Опубліковано: 23 грудня 2023

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Статті в журналах з теми "Micro forming process"

1

Lee, Hye Jin, Nak Kyu Lee, and Seo Gou Choi. "Development of Miniaturized Micro Metal Forming Manufacturing System." Materials Science Forum 544-545 (May 2007): 223–26. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.223.

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Анотація:
The existing forming press uses a hydraulic actuator and high powered mechanical actuator, therefore occupying a large space because of its size. This type of system is inefficient for manufacturing micro size and precision products. As forming components are small in size, forming equipment must also be small in size because the forming die and load must be small. The micro forming manufacturing system is an ultra precision forming equipment the size of several micros to millimeters and precision of sub-micro to micrometer. This micro forming manufacturing system has the advantage of minimization in manipulating distance and working space. As equipment and tools become smaller in size, minute inertia force and high natural frequency can be obtained. Therefore, high precision forming performance can be obtained. This allows the factory to quickly provide the customer with goods because the manufacturing system and process are reduced. To construct a micro manufacturing system, many technologies are necessary such as high stiffness frame, high precision actuating part, structural analysis, high precision tools and system control. In this paper Research development about a micro metal forming manufacturing system has been developed. To coincide with the purpose to be more practical, we set the development of the equipment including micro deep drawing, micro punching and micro restriking process to the goal. To achieve this goal, the miniaturized micro metal forming manufacturing system is designed and made with miniaturized size system. A micro deep drawing process and system dynamic characteristic experiments are researched using this miniaturized micro forming system. A micro deep drawing experiment is performed using micro thin foil materials (Al-1100, SUS-304). If this miniaturized micro forming technology is used, efficient material practical use in the micro forming field which uses the micro metal thin foil is possible.
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2

Zheng, Wei, Guang Chun Wang, Tao Wu, and Li Bin Song. "Study on Formability of Micro-Feature in the Coining Process." Materials Science Forum 704-705 (December 2011): 129–34. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.129.

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Анотація:
In micro-manufacture field, micro-forming is paid much attention due to its efficiency for mass production. However, owing to the particularity of deformation, mass researches for specialized micro-forming processes to direct the industrial production are of great urgency. As a similar process with the micro-forming, the forming property of micro-feature forming in coining process was investigated by the experimental research and numerical analysis. Firstly, utilizing the workpieces with different thicknesses and micro-feature sizes, the coining processes were numerically simulated to study the forming property of micro-feature. The height of micro-feature was selected as the evaluation criteria for the deformation behavior. Then, the pure copper specimens with different thicknesses were coined experimentally, using a die with a micro-hole by the universal testing machine to verify the simulation results. Finally, a modified scheme was successful to be proposed which could improve the manufacturability of the processes. The research results could provide technical references for manufacturing micro-parts and those with micro-features.
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3

Lee, Hye Jin, Nak Kyu Lee, Sang Mok Lee, Geun An Lee, and Seung Soo Kim. "Development of Micro Metal Forming Manufacturing System." Materials Science Forum 505-507 (January 2006): 19–24. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.19.

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Анотація:
The micro metal forming manufacturing system is essentially an ultra precision forming press that can manufacture various micro scale products from metal thin foil and bulk material. In this paper, the micro metal forming manufacturing system has been developed using a micro servo motor. A micro forming system has been developed in Japan with a micro press that is limited to the single forming process. However, a press with a multi forming process is needed and we set about performing research and development of assorted equipment, including investigation into micro deep drawing and the micro punching process. In order to achieve this goal, exploration into the micro forming process as related to the multi forming process must be preceded first. Material selection and analysis of the micro forming process are accomplished in this paper, and the basis research as to how to make the actual system is accomplished.
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4

Vollertsen, Frank. "Size Effects in Micro Forming." Key Engineering Materials 473 (March 2011): 3–12. http://dx.doi.org/10.4028/www.scientific.net/kem.473.3.

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Анотація:
Size effects are effects which might occur, if the dimensions of a forming process are scaled up or down. They might enable or disable the application of a process in the micro range. Based on the systematic order of size effects, which defines density, shape and structure effects, one example for each group is given. A density effect, which occurs in Tiffany structures, explains the changes in forming behavior of foils with respect to the forming limit diagram. The feasibility of a new heading process only in the micro range is due to a shape effect, driven by the surface energy. The changes in the tribology in deep drawing by a structure effect, known as closed an open lubricant pocket model, can be explained only if one takes the temperature dependence of the viscosity of the lubricant into account.
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5

Lim, Samuel C. V., Yingyot Aue-U-Lan, Danno Atsushi, Mei Qian Chew, and Chow Cher Wong. "Process and Material Property Effects in the Progressive Forming of Micro-Pins." Key Engineering Materials 447-448 (September 2010): 432–36. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.432.

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Анотація:
A progressive forming process for micro-components was developed to circumvent the issue of handling of small micro-parts while keeping in mind the need for high manufacturing through-put. The mechanical properties and microstructure of the material have been found to play a significant role in the forming of micro-components. In this work, the effect of mechanical property on the forming of copper micro-pins by the progressive forming process is highlighted. Empirical results show that the forming load decreases for forming micro-pin with 0.3mm diameter after annealing but the pin height obtainable decreases as well compared to that prior to the heat treatment.
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6

Müller, Benedikt, and Andreas Schubert. "Generation of micro channels in AlMg4.5Mn0.7 sheets using a vibration-assisted micro forming process." MATEC Web of Conferences 190 (2018): 10003. http://dx.doi.org/10.1051/matecconf/201819010003.

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Анотація:
Micro forming can be used for a highly efficient manufacturing of small parts like screws or caps. Because of the small dimensions of the structures, high stresses and forming forces occur, especially in the case of micro bulk forming. In addition, the influence of friction is significantly higher compared to macro forming processes. A typical example of small structures are micro channels. An approach for the reduction of the necessary forming force to obtain lower loads on the tool consists in a vibration-assisted micro forming process. As vibration source, a piezo power module is placed directly in the force axis of the forming press. For the investigations, micro channels with a depth of more than 300 μm and a width of 300 μm are formed into 1.5 mm thick AlMg4.5Mn0.7 aluminium alloy sheets. The focus of the research lies in the influence of the process parameters like frequency and oscillation amplitude onto the material flow and the achieved channel depths. To investigate a possible influence on the friction conditions due to the vibration assistance, different lubrication conditions are applied. First results show a channel depth increase of 12 % compared to samples formed without vibration assistance.
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7

Wang, C. J., B. Guo, D. B. Shan, Y. Z. Wang, J. Zhou, and F. Gong. "Investigation of forming process for micro‐socket connecters." Materials Research Innovations 15, sup1 (February 2011): s225—s229. http://dx.doi.org/10.1179/143307511x12858957673473.

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8

Song, Jung Han, Jeanho Park, Jong Sup Lee, Seo Gou Choi, Hye Jin Lee, and Jeong Ho Hwang. "Micro Pattern Forming of Spiral Grooves in a Fluid Dynamic Bearing Using Desktop Forming System." Advanced Materials Research 538-541 (June 2012): 1203–7. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1203.

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Анотація:
This research explores the micro-forming process of spiral groove pattern on Fluid Dynamic Bearing(FDB), which is utilized in precision driving part of the hard disk drive(HDD), using micro desktop forming system. While EDM and ECM process has been widely used to engrave the precision pattern which generates dynamic pressure on FDBs, micro forming process is newly proposed in this study to increase the productivity and to reduce the product costs. At first, desktop forming system is designed for spiral groove pattern forming. FE simulations are followed in order to evaluate the feasibility of micro-forming. The simulation results show that forming loads of 1,500Kgf is required to fabricate micro patterns with the depth of 15 μm. Finally the formability test is carried out with various forming loads. Deformed shapes and forming loads obtained from the test are compared with those from the analysis. The results fully demonstrate that micro pattern forming techniques are available to fabricate micro spiral groove patterns in FDB.
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9

Gau, Jenn-Terng, Hao Gu, Xinhui Liu, Kun-Min Huang, and Bor-Tsuen Lin. "Forming micro channels on aluminum foils by using flexible die forming process." Journal of Manufacturing Processes 19 (August 2015): 102–11. http://dx.doi.org/10.1016/j.jmapro.2015.04.006.

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10

Kinouchi, Yuki, Masahiko Yoshino, Hiroyuki Miyasaka, Nayuta Minami, Tomoyuki Takahashi, and Noritsugu Umehara. "Nano Forming Process for Functional Surface(M^4 processes and micro-manufacturing for science)." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2005.2 (2005): 849–54. http://dx.doi.org/10.1299/jsmelem.2005.2.849.

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Більше джерел

Дисертації з теми "Micro forming process"

1

Chen, Yang. "Thermal Forming Process for Precision Freeform Optical Mirrors and Micro Glass Optics." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267477993.

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2

Hapsari, Gemala. "Identification of inelastic cyclic behaviour of thin metal sheets under very large strain from instrumented micro forming process." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD010.

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Анотація:
Le succès de l'industrialisation des micro-produits dépend des processus de conception et de fabrication. Une étape cruciale est la caractérisation du matériau utilisé dans les simulations numériques. Bien qu’il confère certaines propriétés mécaniques au matériau, l’essai de traction est loin de représenter la déformation complète subie par le matériau. Par conséquent, un autre test, Micro Incremental Deformation (Micro InDef), test présentant une déformation non homogène et riche en information, est développé sur la base du micro formage incrémental mono-point (µSPIF).Pour modéliser la formabilité du matériau (en particulier l'endommagement de matériaux), le modèle de Lemaitre est choisi en raison de sa capacité à modéliser le comportement du matériau en s'appuyant sur la mécanique des milieux continus et la thermodynamique de processus irréversibles. Dans cette étude, le Micro InDef test en tant que test de caractérisation de matériau est validé. De plus, en utilisant une méthode d’identifiabilité, il est prouvé que les paramètres matériaux identifiés sont des paramètres physiques, et non un simple lissage mathématique. Une fois le modèle de Lemaitre identifié, des tests expérimentaux et des simulations éléments finis sont effectués sur des tests de traction, des tests de cisaillement, des courbes limites de formage et des essais hors plan, afin de vérifier la fiabilité et l'adaptabilité de notre identification.Cette étude est finalement appliquée à un projet industriel dans le domaine des connecteurs, qui utilise principalement les alliages de cuivre comme matériau constitutifs
The success of micro product's industrialization depends on the conception, design and manufacturing process. A crucial step is the characterization of the material used in the numerical simulations. Although it gives some mechanical properties of material, tensile test is far from representing the complete deformation produced in the material. Therefore another test, Micro Incremental Deformation (Micro InDef), test which has non homogeneous deformation and which is rich in charactérization data is developped, based on Micro Single Point Incremental Forming (µSPIF).To modelise the limit of formability (especially the damage of materials), Lemaitre's constitutive model is chosen due to its possibility to define the material behaviour by using continuum mechanics and thermodynamics of irreversible processes. Within this study, Micro InDef as material characterization test is validated. Moreover, the material parameters identified are proven to be physical parameters, instead of only mathematical fitting, using an identifiability method. Once Lemaitre's model is identified, experimental tests and finite element simulations are performed on tensile tests, shearing tests, forming limit tests and out-of-plane tests, to verify the reliability and adaptability of our identification.This study is applied in an industrial project within the connector domain, which use copper alloys
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3

Thuillet, Stéphanie. "Modélisation de lois de comportement pour le micro-formage de tôles ultra-fines." Electronic Thesis or Diss., Lorient, 2023. http://www.theses.fr/2023LORIS655.

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Анотація:
La miniaturisation fait maintenant partie intégrante des problématiques actuelles de notre société. Afin de combler l'attente des industries demandeuses de plus en plus de composants de petites tailles, tout en respectant des délais de fabrication courts, les procédés par déformation plastique se sont révélés être les plus efficaces. Pour éviter de nombreux tests expérimentaux la simulation de ces procédés est une alternative importante. L'objectif de cette thèse vise à la définition d'une loi de comportement dédiée aux tôles ultra-fines d'alliages cuivreux présents dans les industries et en particulier l'horlogerie. Une campagne expérimentale est ainsi menée dans le but d'observer le comportement de tôles en cuivre de 0,25 mm d'épaisseur et d'un alliage de cuivre béryllium de 0,20 mm d'épaisseur. La caractérisation microstructurale permet de valider le cadre des tôles ultra-fines grâce à l'étude du nombre et de la taille des grains dans l'épaisseur. Les tests expérimentaux mettent quant à eux en avant le comportement isotrope du cuivre, le CuBe possède pour sa part un comportement anisotrope et une prédominance d'écrouissage cinématique. En relation avec les observations expérimentales, deux modèles utilisant une loi élastoviscoplastique sont proposés et comparés, un dans le cadre de la plasticité associée et l'autre employant la plasticité non-associée. Ces modèles prennent notamment en compte un écrouissage mixte. Les paramètres matériaux sont ensuite identifiés à l'aide d'un algorithme de minimisation. Les différentes analyses sur les méthodes de simulations et d'identification indiquent que le modèle de plasticité non-associée est le plus adapté. Des simulations et identifications sur des éléments de volume représentatifs sont suffisantes dans notre cas. Enfin différents procédés de mise en forme sont étudiés et simulés grâce à l'implémentation de la loi de comportement proposée dans un code de calcul par la méthode des éléments finis. Ils mettent en évidence le développement du modèle proposé permettant de prendre en compte un écrouissage mixte. Ce modèle peut donc être utilisé pour la simulation de procédés de mise en forme de tôles ultra-fines d'alliages cuivreux de petites dimensions sous sollicitations complexes
Miniaturization is now an integral part of the current issues of our society. To meet industries expectation which are looking for more small-sized components with shorter manufacturing deadlines, plastic deformation processes have proven to be the most effective. To avoid a lot of experimental tests, simulation of these processes is an important alternative. The goal of this thesis is to define a behaviour law dedicated to ultra-thin sheets of copper alloys which are present in industries and particularly in the watchmaking industry. An experimental campaign is thus carried out to notice the behaviour of a of 0,25 mm thick copper sheet and of a 0,20 mm thick copper beryllium alloy. The micro-structural characterisation makes it possible to validate the framework of ultra-thin sheets thanks to the study of the number and size of the grains in the thickness. Experimental tests highlight the isotropic behaviour of copper. The CuBe has an anisotropic behaviour and a predominance of kinematic work hardening. Regarding to the experimental observations, two models using an elastoviscoplastic law are proposed and compared, one within the framework of associated plasticity and the other employing non-associated plasticity. These models especially take into account a mixed work hardening. Material parameters are then identified using a minimisation algorithm. The different analyses on the simulation and identification methods indicate that the non-associated plasticity model is the most suitable. Simulations and identifications on representative volume elements are sufficient in our case. Finally, the several forming processes are studied and simulated thanks to the implementation of behaviour laws in a computer code by the finite element method. They highlight the development of the proposed model allowing to take into account a mixed work hardening. This model can therefore be used for the simulation of forming processes of ultra-thin sheets, especially of small-sized copper alloys under complex stresses
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4

Tsai, Chih-Ching, and 蔡志慶. "Effects of Process Parameters on Micro Equilateral Vertical Steel Forming Process." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/33151323994194763815.

Повний текст джерела
Анотація:
碩士
國立勤益科技大學
機械工程系
102
Based on different friction coefficients, this study aims to analyze the stamping simulation with various die angles (88°, 89°, 90°, 91°, and 92°), distinct plate thicknesses (0.05mm, 0.078mm, and 0.1mm), and different die radii (0.4mm, 0.5mm, 0.6mm, 0.7mm, and 0.8mm) for the difference in the micro equilateral vertical steel process of the stainless steel plate (SUS304). The micro equilateral vertical steel process is simulated with the application of Prandtl-Reuss flow rule and the combination of Finite Element deformation theory and Updated Lagrangian formulation (ULF) to establish an incremental elasticoplastic deformation finite element analysis program with Coulomb law of friction. Generalized rmin algorithm is utilized for dealing with the elasticoplastic state and the contact problem with the die contact surface in the forming process. From the simulated data, the relations among deformation history, punch load, and punch stroke and the stress and strain distribution in the forming process are acquired. Regarding the comparison of the thinnest thickness with changing friction coefficients, the effect of friction coefficients on the thinnest thickness is not significant. Such Finite Element Analysis could precisely analyze the entire deformation process of the equilateral vertical steel stamping forming, meaning that the history of the deformation process could be successfully depicted. With such deformation history, the forming situation of the metal plate could be acquired and the forming problem in the actual stamping process could be predicted. The research findings show that the thinnest plate part in the micro equilateral vertical steel forming process appears on the vertical corner of the central point that cracks, if any, would appear on the vertical corner of the central point. The simulation and experiments in this study present that the proposed calculation could be effectively applied to the micro equilateral vertical steel forming process analysis. In Finite Element Analysis, the entire deformation process and the stress and strain distribution in the deformation process could be simulated. The research results obviously prove the calculation being able to effectively simulate the equilateral vertical steel stamping forming process.
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5

Hsu, Sheng-En, and 徐聖恩. "Magnetic Field Analysis of the Electromagnetic Micro-Forming Process." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86116448239803795988.

Повний текст джерела
Анотація:
碩士
清雲科技大學
機械工程研究所
96
In general, the electromagnetic forming process mostly relies on the use of the electromagnetic force to deform metallic workpieces at high speed. The force is induced by the high current and voltage with a coil set. This, however, would result the high design cost and the temperature rising problem. In this study, an electromagnetic micro-forming process is designed that the induced electromagnetic force will attract the ferromagnetic punch to contact the workpiece, and then forced the workpiece to deform. To build a generalized interface program for transferring the correspondent data between two commercial F.E. code, ANSYS and LS-DYNA, is the first goal of this study. Then, the experimental apparatus for the electromagnetic micro-forming process will be designed and manufactured. Meanwhile, the dynamic finite element analysis of the micro-forming process coupled with structure and electromagnetic fields is examined. The size effect in the micro-forming processes and the spring back phenomenon will be observed and discussed in details. With the different distances being variations between the coil and punch, the effects on the predicted shape are assessed. Through comparison with the experiments, the numerical results have a same tendency as in the test works. And the method used in this study is available in the relative micro-forming processes.
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6

Wang, Chien Ming, and 王健銘. "Mold design and analysis of the electromagnetic micro-forming process." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46340138842263140184.

Повний текст джерела
Анотація:
碩士
清雲科技大學
機械工程研究所
96
The development in science and technology is fast now; the products are designed and manufactured by nanometer scale, it makes the micro-forming processes more important today. In micro-forming, the using of nontraditional technologies such as EDM, WEDG, PVD, PVC etc..., is rather normal. In this study, an electromagnetic micro-forming process is designed that the induced electromagnetic force will attract the ferromagnetic punch to contact the workpiece, and then forced the workpiece to deform. The experimental apparatus for the electromagnetic micro-forming process will be designed and manufactured. Meanwhile, the analysis of the micro-forming process by the dynamic FEM is examined. The relative experiment will proceed simultaneously. The sizes and shapes of the forming die and punch are discussed in details. Two solving methods for spring back phenomenon will be observed and assessed. These analytical results have been rather useful in the tools design, the products control and forming limit prediction. The most significant advantage is developing the precise analysis technology to suit for the future necessity of manufacturing processes in 3C industries.
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7

PAN, SHUO-KAI, and 潘碩鎧. "Study on Forming Limit in Nosing Process of Micro Copper Cup." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/y9ujg7.

Повний текст джерела
Анотація:
碩士
國立高雄應用科技大學
模具工程系
106
Nosing process reducing the dimension of the open end of tube or tubular container is one of important methods for the assembly of micro metal components. A typical application of the nosing process is the assembly of micro pins and tubes for manufacturing micro electrical connectors, such as Pogo pins, which have been widely used in electronics products and precision instruments. However, the characteristics of the nosing process at micro scale may be different from those at macro scale and have not been fully understood. 　　This study used finite element simulations and experiments to investigate the forming limit in the nosing process of micro copper cups, and to establish the forming limit curves in terms of nosing ratio (the ratio of the final diameter to the initial diameter), die angle, and friction factor. Two-stage processes, including backward extrusion and nosing processes, were considered in simulations and experiments at micro scale. The backward extrusion processes were employed to produce the 1 mm diameter cups with different wall thickness. The cups were later used in the nosing processes under different conditions. By analyzing the results of the deformed cups from the simulations, it is possible to identify the failure conditions in the processes and establish the forming limit curves for the nosing processes. The cups with 1 mm diameter and 0.1 mm wall thickness, which were obtained from the backward extrusion processes, were used in the experiments of the nosing processes under two conditions, the nosing ratios of 0.70 and 0.88, and the same die angle of 30°. 　　The simulation results show that the limit of the nosing ratio decreases as the die angle or friction factor reduces. Moreover, the cases with the nosing ratio of 0.70 are more sensitive to lubricating conditions and to form the defects of bugling in the wall and rim of the cup than those cases with the nosing ratio of 0.88, as shown in the experimental results. The study not only explores the characteristics of the noise process of micro copper cups but also establishes the forming limit curves which can be the guidelines for the design of micro metal components.
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8

HSU, SHIH-CHANG, and 許世昌. "Development of micro servo pressing system and forming limit of pure copper in micro drawing process." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/r4a7u2.

Повний текст джерела
Анотація:
碩士
國立虎尾科技大學
動力機械工程系機械與機電工程碩士在職專班
107
The aim of this study is to develop a parametric desktop metal micro-forming servo press, and to investigate the influence of stamping parameters on the forming limit of copper sheet to obtain the maximum forming limit for making micro drawing components. The developed servo press system uses a servo motor to drive the screw, so that the screw drives the punch to perform the movement of the punching curve, and then receives the reaction force through the force sensor, and transmits it back to the system for data analysis. The experimental results show that the larger R angle of punch corner, the deeper of drawing depth. Therefore, the R-angle of the punch affects the forming limit. In the analysis of the results of different stamping curves, the motion curve of the pulse punch press and the constant velocity of punch lift can obtain lower punching force and good quality of product. In addition, increasing punch speed can increase the drawing depth. In the experiment, the worst processing parameters were selected to add R32 oil to lubricate for stamping. However, it was found that open lubrication is ineffective in improving the forming limit, which may be due to incorrect lubricant selection or open lubrication mode that does not provide effective lubrication.
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9

Wang, Yu Jyun, and 王昱鈞. "A Study of the Micro Bead Forming Process of Metallic Thin Sheet." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/78400426700149264929.

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Анотація:
碩士
北臺灣科學技術學院
機電整合研究所
99
As a result of products trending miniaturization in recent years, micro technology has been widely used in various areas. On the field of micro-forming of sheet metal, processing scale is close to hundreds of even dozens of micron scale. Due to the feature size of the finished product is almost as the microscopic size, so the deformation behavior of materials may not be very consistent to the macroscopic deformation behavior of traditional homogeneous material. In other words, the grain size will affect the behavior of macroscopic deformation. This article aims at the discussion of deformation behavior considering size effect on bead forming process of sheet metal. In this study, the test specimens were made by phosphor bronze sheets for bead forming test. The specimens with different thickness were firstly heated at different temperatures for obtaining the objective grain sizes. And the mechanical properties of specimen were acquired by using tensile test. Through the bead forming test with a bead forming machine, the curled angles, springback and curling load were measured and analyzed for investigating the geometric size effect and grain size effect during the bead forming process. In addition, this study adopted the finite element method with the macro deformation module of DEFORM-3D software code to simulating the bead forming process. The simulation results were compared with experimental results to estimate the validity of simulation with the macro deformation module considering the grain size effect in micro bead forming proces.
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10

Lin, Hsing-yu, and 林星佑. "Feasibility Study on Micro-forming Process of Electrodeposited Nickel Foil and Rolled Nickel Foil." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/kh497v.

Повний текст джерела
Анотація:
碩士
國立臺灣科技大學
機械工程系
99
The demands of micro-forming process in modern manufacturing technology have increased in the past decade. However, the cost of materials in the micro-forming process has also increased with the decreased dimension of parts. In this study, the microstructure, plastic strain ratio (r-value) and spring-back of nickel foils fabricated in two different ways, electrodeposited(ED) nickel foils and rolled nickel foils are described. The thickness of electrodeposited nickel foils used were 0.05mm, 0.075mm and 0.1mm respectively. The thickness of rolled nickel foils used were 0.05mm and 0.1mm. In the results, the plastic strain ratio of ED nickel foils showed lower anisotropy than rolled nickel foils. Moreover, the spring-back angel of rolled nickel foils was affected by the rolling direction but the ED nickel foils showed good consistence of spring-back in varied direction.
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Частини книг з теми "Micro forming process"

1

Mishra, K., B. R. Sarkar, and B. Bhattacharyya. "Vibration-Assisted Micro-EDM Process." In Materials Forming, Machining and Tribology, 161–84. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-3074-2_8.

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Das, S., B. Doloi, and B. Bhattacharyya. "Recent Advancement on Ultrasonic Micro Machining (USMM) Process." In Materials Forming, Machining and Tribology, 61–91. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52009-4_2.

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3

Kibria, Golam, B. Doloi, and B. Bhattacharyya. "Laser Micro-turning Process of Aluminium Oxide Ceramic Using Pulsed Nd:YAG Laser." In Materials Forming, Machining and Tribology, 179–226. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52009-4_5.

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Rajenthirakumar, D., N. Srinivasan, and R. Sridhar. "Development of a Micro-forming System for Micro-extrusion Process of Micro-pin in AZ80 Alloy." In Lecture Notes in Mechanical Engineering, 1227–29. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0550-5_117.

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5

Kibria, Golam, I. Shivakoti, B. B. Pradhan, and B. Bhattacharyya. "Electrical Discharge Micro-hole Machining Process of Ti–6Al–4V: Improvement of Accuracy and Performance." In Materials Forming, Machining and Tribology, 93–144. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52009-4_3.

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Kumar, Mohan, Ankit Jain, Shashank Shukla, and Vivek Bajpai. "Experimental and Statistical Analysis of Process Parameters on Micro-milling of Ti–6Al–4V Alloy." In Advances in Forming, Machining and Automation, 263–71. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3866-5_23.

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Cho, Won Seung, Myeong Woo Cho, and Dong Sam Park. "Micro Groove Forming on AlN/hBN Composites Using Powder Blasting Process." In Materials Science Forum, 1018–21. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.1018.

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Lv, Hui, and Wen Zhao. "Forming and Packing Process of High Density Mental Micro-channel Heat Sink." In Lecture Notes in Electrical Engineering, 544–52. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9441-7_56.

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Na, Young Sang, S. G. Kang, K. Y. Park, and Jong Hoon Lee. "Estimation of Micro-Formability and FEM Simulation of Micro-Forming Process of a Zr-Based Bulk Metallic Glass." In THERMEC 2006, 2129–34. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.2129.

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10

Lee, Sang Mok, Hoon Jae Park, Seung Soo Kim, Tae Hoon Choi, E. Z. Kim, and Geun An Lee. "The Potentiality of Micro-Scaled Multi-Filament Wire Forming Using Repetitive Hydrostatic Extrusion Process." In Advanced Materials Research, 77–80. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.77.

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Тези доповідей конференцій з теми "Micro forming process"

1

KHADEMI, M. "Finite element model for micro-stamping titanium bipolar plate." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-165.

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Abstract. Bipolar plates are the essential components of a Proton Exchange Membrane Fuel Cell. Lightweight bipolar plates can be micro-stamped from an ultrathin metallic foil. A major concern is the manufacturability of the foil in the micro-stamping process. The typical stamped micro-channels have end cavities or corners where the deformation mode can be different from the two-dimensional plane strain conditions that occur at the straight sections of the micro-channels. The thin foil has a large ratio of length (or width) to thickness, and shell elements were often used for three-dimensional models. Currently, it is unknown if the shell elements available in commercial software packages are able to predict the ultrathin material behaviour correctly. In addition, the deformation behaviour and forming limits of titanium foil in the micro-stamping process are not well understood. The current study uses a micro-stamping tool to produce straight micro-channels from commercially pure titanium foil. The experimental data are used to validate a two-dimensional and a three-dimensional finite element model of the process. It is shown that there are deviations between the experimental and the numerical thinning results. Material thinning is different between the straight and the cavity end sections suggesting that three-dimensional process models are required to accurately analyze forming.
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PRESZ, W. "Hybrid SPD process of aluminium 6060 for microforming." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-90.

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Abstract. The increasing share and expansion of miniature devices requires the mastery of miniature parts production, including metal parts. In metal microforming, due to the conditions of mechanical similarity, the aim is to use materials with the smallest grain. Ultra-fine-grained metals (UFG) fulfill this requirement. These metals can be obtained, inter alia, in SPD processes such as ECAP. The work uses the extension of the SPD based on ECAP with additional metal forming operations necessary to obtain blanks for microforming in the form of a 0.2 mm foil. Three variants of the technological process were performed. This foil was then subjected to a micro-drawing operation aimed at determining the influence of the foil preparation process on the sheet metal microforming process flow.
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Presz, Wojciech, and Robert Cacko. "Influence of Micro-Rivet Manufacturing Process on Quality of Micro-Joint." In THE 14TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2011. AIP, 2011. http://dx.doi.org/10.1063/1.3589571.

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DE CASTRO, C. C. "Process characteristics of constrained friction processing of AM50 magnesium alloy." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-188.

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Abstract. Constrained Friction Processing (CFP) is a novel solid-state technique suitable to produce rods especially from lightweight materials. The technology is particularly interesting to overcome the processing challenges associated with Mg due to its hexagonal close-packed (hcp) structure. The process is a variation of the refill friction stir spot welding (refill FSSW) technique, and is performed by plunging the rotating shoulder into the base material, which causes the material to be extruded into the cavity crated by the retraction of the rotating probe and, at the same time, being constrained by it. The complex shear and the heat generated during the process causes metallurgical transformations in the material, such as dynamic recrystallization, allowing for substantial grain refinement to micro- or even submicro- scale. In this study, real time data – torque, axial force and temperature – acquired from the process are analyzed in order to present, for the first time, a description of the CFP technique. Furthermore, the resultant features of the microstructure of a refined rod is explored.
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5

Komatsu, Takafumi, Takeshi Matsumura, Tomoaki Yoshino, and Shiro Torizuka. "Micro Cutting Process of Ultra Fine Grain Steels." In THE 14TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2011. AIP, 2011. http://dx.doi.org/10.1063/1.3589578.

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CAPPELLINI, C. "Analysis of Ti-6Al-4V micro-milling resulting surface roughness for osteointegration enhancement." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-136.

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Abstract. In the last period, the demand of prostheses has massively increased. To guarantee their reliability, properties of durability, biocompatibility, and osseointegration results to be mandatory. Possessing these attributes, Ti-6Al-4V alloy represents the most employed material for implants realization, and because of its microstructure, it can be manufactured by different processing methods, i.e., machining, and additive manufacturing. Considering the necessity of patient-tailored implants, and the capability of additive manufacturing to produce single batch, and complex shapes, at relatively low cost and short time, this latter represents a rewarding process. Compared to biocompatibility, that is mainly function of material chemistry, durability and osteointegration concern mostly surface roughness that affects cells growth at bone-prosthesis interface. After additive manufacturing process and prior to be inserted in the human body, a prosthetic implant is finished by machining operations, hence, the attainment of an appropriate resulting surface roughness is crucial for obtaining a successful implant. Thus, roughness forecasting capability, as a function of the employed finishing process, permits its optimization, avoiding expensive scraps. For this reason, this paper deals with the development of predictive models of surface roughness when micro-milling Ti-6Al-4V alloy specimens.
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Shi, Yi, Jian Cao, and Kornel F. Ehmann. "Dieless Water Jet Incremental Micro-Forming." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6490.

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Compared to the conventional single-point incremental forming (SPIF) processes, water jet incremental micro-forming (WJIMF) utilizes a high-speed and high-pressure water jet as a tool instead of a rigid round-tipped tool to fabricate thin shell micro objects. Thin foils were incrementally formed with micro-scale water jets on a specially designed testbed. In this paper, the effects on the water jet incremental micro-forming process with respect to several key process parameters, including water jet pressure, relative water jet diameter, sheet thickness, and feed rate, were experimentally studied using stainless steel foils. Experimental results indicate that feature geometry, especially depth, can be controlled by adjusting the processes parameters. The presented results and conclusions provide a foundation for future modeling work and the selection of process parameters to achieve high quality thin shell micro products.
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Liu, Wing Kam. "A Multi-scale Simulation of Micro-forming Process with RKEM." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766508.

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Fan, Yujie, Erbin Guo, Jianzhong Zhou, Kaiting Yin, and Pengfei Cui. "Research on Process of Multi-point Micro Laser Shock Forming." In 2016 International Forum on Mechanical, Control and Automation (IFMCA 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/ifmca-16.2017.137.

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10

Lee, Hye-Jin, Hyoung-Wook Lee, Nak-Kyu Lee, Geun-An Lee, Soegou Choi, and Sung-Min Bae. "Development of Micro Dieless Incremental Forming System." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21542.

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The MEMS (Micro Electro Mechanical Systems) process is used in a micro/nano pattern manufacturing method. This method is based on the lithography technology. But the MEMS process has some problems such as complicated process, long processing time and high production costs. Many researchers are doing research in substitute manufacturing method to work out a solution to these problems. In this paper, we apply a dieless incremental forming technology to a substitute method of MEMS process. This dieless forming technology is using in the commercial scale sheet forming such as a prototype of automobile sheet parts. 5-axes CNC (Computerized Numeric Control) method are applied in this system to get a micro-scale dieless forming results. These 5-axes system are composed of precision AC servo motor stages (4-axes) and PZT actuator (1-axis). A PZT actuator is used in a precision actuating axis because it can be operated in the nano scale stroke resolution. This micro dieless incremental forming system has the advantage of minimization in manipulating distance and working space. As equipment and tools become smaller in size, minute inertia force and high natural frequency can be obtained. Therefore, high precision forming performance can be obtained. This allows the factory to quickly provide the customer with goods because the manufacturing system and process are reduced. To construct this micro manufacturing system, many technologies are necessary such as high stiffness frame, high precision actuating part, structural analysis, high precision tools and system control. To achieve the optimal forming quality, the micro dieless forming system is designed and made with high stiffness characteristic.
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