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Abstract：
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Six-angle hole bolt has a deep inner hole to make its technological design difficulty. For this problem, a multi-station cold upsetting process for six-angle hole bolt was presented, and the multi-station cold upsetting process for six-angle hole bolt was simulated by finite element simulation software Deform-3D. Then, the load-stroke curve as well as the distributions of equivalent stress, equivalent strain and damage value in the forming process were analyzed, and the experiment was conducted to validate the simulation results finally. The research results show that the multi-position cold upsetting process is feasible, and the simulated cold upsetting parts are filled fully. However, the loading values are larger at station 2, station 3 and station 4, which are 429，826 and 380 kN respectively, the maximum damage value 0.38 is less than the critical damage value 0.42 of 40Cr, and the crack is not easy to generate. Furthermore, the products obtained in the experiment and the simulation results have a good consistency, and the size consistency of cold upsetting part is better. The results shows that the multi-station cold upsetting process for six-angle hole bolt is reliable, which has a certain directive significance to the multi-station cold upsetting technology of this kind of parts.
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Funds：
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郑州市科技重大专项资金（152PZDZX007）
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AuthorIntro：
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刘光辉(1989-), 男, 硕士，工程师，E-mail：liu0406gh@163.com；通讯作者：刘华（1962-），男，博士，博士生导师，研究员，E-mail：13903832971@163.com
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Reference：
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