Transactions of Materials and Heat Treatment

Title：Finite element analysis on aluminum alloy 6061 in warm fine blanking process

Authors： Li Shuang Zhuang Xincun Zhao Zhen

Unit： Shanghai Jiao Tong University

KeyWords： aluminum alloy 6061 fine blanking shear cutting surface clean cutting surface rough fracture surface

ClassificationCode：TG381

year,vol(issue):pagenumber：2016,41(8):35-38

Abstract：

In order to explore the influence of temperature on improving the quality of fine blanking part produced by 6061 aluminum alloy, uniaxial tensile tests were carried out at different temperatures for aluminum alloy 6061 to obtain stress-strain curves, and the relationship of fracture threshold with the temperature was established by combining results of uniaxial tensile tests and finite element simulation. Then, temperature is coupled to Normalized CockCroft-Latham fracture criterion, and the warm fine blanking processes of aluminum alloy 6061 at different temperatures were analyzed by finite element simulation. Finally, the simulation results were verified by fine blanking experiment. Results show that raising temperature can delay the generation and extension of the fracture. Sheared zone of fine blanking breaks completely at 25 ℃, but at 175 ℃ cracks only generates around cutting edge. Therefore, the quality of shear cutting surface improves with the increase of temperature. Thickness of clean cutting surface increases from 1.53 mm at 25 ℃ to 3.02 mm at 175 ℃, and that of rough fracture surface decreases from 3.68 mm at 25 ℃ to 2.06 mm at 175 ℃.

Funds：

国家自然科学基金资助项目（51475296）

李双（1993-），男，硕士研究生赵震（1972-），男，博士，教授

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