A Plastic Forming Analysis on Thermal Differential Electric Upsetting Process of Hollow Tubes

• Main Authors: Bo-Shian Wu, 吳柏賢
• Other Authors: Yuan-Chuan Hsu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/rzkgsp

碩士 === 國立虎尾科技大學 === 創意工程與精密科技研究所 === 99 === This study is the use of finite element software, DEFORM-2D, for AISI 1045 carbon steel tube electric differential temperature end of the forging process analysis, to understand the tube at the end of forging temperature when the electrical difference of evolution, stress, strain, temperature distribution of the voltage, tube thickness, the length of the heating tube, forging speed, heating time and other related parameters of the tube when the electrical difference between the effect of forging temperature side. The study is divided into differential temperature-side tube and tubing forming forging basic research applied research in two parts, basic research to explore the tube at different voltage, thickness and length of heating, the heating time and temperature distribution of the cases, followed by different depth of forging thick, in order to understand the deformation conditions. Tube forming part of the application, to explore the tube flaring forming the stress, strain, temperature distribution studies, and analyze the electrical side forging and forming tubes after distribution of grain size and hardness of the microstructure of the change. Forged by the electrical side of this experimental study to verify the accuracy of finite element simulation, testing the heating time, forming the shape, etc., are measured experimental data and simulation parameters adjusted for each other, the results show that finite element simulation and experimental results quite consistent, even verify the finite element simulation software DEFORM-2D shape of the temperature difference applied to the electrical reliability. In this study, the use of microscope and Vickers hardness testing machine to observe the end of forging, flared after forming the microstructure and hardness distribution. The results showed that although metallographic microstructure showing Martensitic, but the temperature difference between the study of electrical forming, a large temperature gradient, resulting in some of Martensitic, so the hardness values measured from the hardness values lower than the literature .