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Hybrid Micro-forming Processes and Quality Evaluation of Micro-double Gear徐杰School of Materials Science and Engineering,Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry...) devices.The technologies of micro-forming and precision assembly are urgently developed to manufacture the micro-double gear with central shaft.In the paper,a novel hy-brid-forming process with two kinds......
: With the miniaturization of parts, size effects occur in the micro-forming processes. To investigate the effects of the specimen size on the flow stress, a series of upsetting deformation experiments were carried out... with decreasing specimen size. This can be explained by the effects of grain orientation stochastic distribution according to the Schmid law. As a result, the micro-forming process must be considered from......
-Petch equation and free surface effect. Key words: micro-forming; micro-bending; size effects; free surface effect ...; The metal forming of very small components by bending, stamping or cutting is commonly used to manufacture micro parts for electronics or mechanics industries[1-3]. With the ongoing miniaturization......
Trans. Nonferrous Met. Soc. China 27(2017) 616-626 Deformation behavior of materials in micro-forming with consideration of intragranular heterogeneities Zhen-wu MA, Guo-quan TONG, Feng CHEN College... between the whole material deformation behavior and each grain deformation behavior in micro-forming, experimental and numerical modelling methods were employed. Tensile test results reveal......
Trans. Nonferrous Met. Soc. China 30(2020) 2994-3005 Modeling of material deformation behavior in micro-forming under consideration of individual grain heterogeneity Zhen-wu MA1, Xuan PENG1, Chun-ju... deformation behavior in micro-forming. First, the influence of individual grain heterogeneity on the deformation behavior of CuZn20 foils was investigated via tensile and micro-hardness tests. The results......
infeasible in analyzing the micro-forming process, so it is necessary to develop an accurate material model to describe the material flow behavior with consideration of size effects. By studying... experiments. These experimental results and the proposed model lay a solid foundation for understanding and further exploring the material flow behavior in the micro-forming process.关键词:......
Received 28 August 2012; accepted 25 October 2012 Abstract: The friction effect is very important in micro-forming process and differs from the usual forming process. A new method of evaluating...-forming. Key words: micro-forming; flow stress; friction; extrusion 1 Introduction The rapid advancement of micro-forming technology in the past few years has led to the creation of several novel......
for Mechanical Engineering, 2016, 40(7): 39-40. [9] LU Dong, YANG Yi, QIN Yi, YANG Gang. Effect of Particle size and sintering temperature on Densification during coupled multifield-activated micro-forming[J... the coupled multifield-activated micro-forming[J]. Materials & Manufacturing Processes, 2013, 28(2): 183-185. [12] ZHOUYu, YANG Yi,YANGGang,YIN De-qiang, QIN Yi, LIU Jian.Effects of sintering temperature......
are widely required in extremely high numbers, in particular for electronic technology, medical equipment, sensor technology and optoelectronics. Micro-forming is well suited to the fabrication of microparts with features in sub-millimeter range, in particular for mass production and productive efficiency[1-3]. Compared with other manufacturing technologies, micro-forming has features in specific......
on forming force in micro compression. The inhomogeneous deformation of surface layer grains was discussed by the main deformation manner of rotation. A good agreement with the experimental results was achieved. Key words: micro-forming; size effects; radial compression; inhomogeneous deformation; scatter of forming force 1 Introduction A growing demand on micro metal components is mainly driven......
