Transactions of Materials and Heat Treatment

Title：Process analysis and parameter optimization on cold heading-extrusion Process analysis and parameter optimization on cold heading-extrusion

Authors： Zhang Wei

Unit： Anyang Vocational and Technical College

KeyWords： cold heading-extrusion forming hex nut damage value orthogonal test Deform-3D

ClassificationCode：TG316.1

year,vol(issue):pagenumber：2018,43(8):103-109

Abstract：

For the cold heading process of a hex nut, the step 5 in two different multi-position forming schemes were simulated by finite element software Deform-3D respectively, and the better extrusion effect produced by the forward extrusion to deepen the inner hole of hex nut was obtained by comparing and analyzing the extrusion effect, extrusion loading and damage value of workpiece. Then, reducing damage value of workpiece was regarded as the object, and the stamping speed, surface hardness of die, split angle of lower punch and friction coefficient were chosen as factors, and the orthogonal experiment was designed to optimize these parameters. Furthermore, the simulation calculation was conducted repeatedly, and the optimal parameters were obtained with the stamping speed of 5 mm·s-1, die surface hardness of 50 HRC, split angle of lower punch of 3° and friction coefficient of 0.1. Finally, the test with above parameters was conducted, and the good extrusion quality was gained to meet all production requirements, which provides a theoretical basis for actual production.

Funds：

企业横向项目（JS-2018173）

张伟（1972-），男，学士，讲师 E-mail：zj_1308@163.com

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