摘要
以拉铆套四工位冷挤压成形为例,针对反向冲孔工序中冲头磨损严重现象,利用Deform-3D软件对冲孔过程进行了有限元数值模拟,并引入正交试验进行工艺参数优化。选取了摩擦因子、冲压速度、模具初始硬度、冲头圆角半径这四个主要影响模具磨损因素,设计4因素3水平的正交试验,以减少冲头磨损量为试验指标获得了最优工艺参数组合。结果表明,当摩擦因子为0.10、冲压速度为6 mm/s、模具初始硬度为70 HRC、冲头圆角半径为0.5 mm时,冲头磨损量最小。
Taking the four-station cold extrusion forming of a riveting sleeve as an example, aiming at the serious wear phenomenon of the punch in reverse punching process, the finite element numerical simulation of punching process was carried out by using Deform-3 D software. The process parameters were optimized by using the orthogonal experiment. The friction factor, the stamping speed, the initial hardness of the die and the radius of the punch fillet were selected as the four main factors that affects the wear of the die. The orthogonal experiment with four factors and three levels was designed. The optimum process parameter combination was obtained by taking reducing the wear of punch as the test index. The results show that when the friction factor is 0.10, the punching speed is 6 mm/s, the initial hardness of the mold is 70 HRC, and the corner radius of the punch is 0.5 mm, the wear of the punch is the least.
作者
张东民
朱景秋
周伟民
陈剑
刘红涛
夏平
ZHANG Dongmin;ZHU Jingqiu;ZHOU Weimin;CHEN Jian;LIU Hongtao;XIA Ping(School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Shanghai Dongfeng Automobile Special Parts Co.,Ltd.,Shanghai 201419,China)
出处
《热加工工艺》
北大核心
2020年第3期119-123,共5页
Hot Working Technology
基金
企业横向项目(J2017-184).
关键词
冷挤压
模具磨损
数值模拟
正交试验
cold extrusion
die wear
numerical simulation
orthogonal test
