锻压技术

基于正交试验的内六角冲头磨损分析及工艺参数优化

英文标题：Wear analysis and process parameter optimization on hexagon punch based on orthogonal test

作者：莫杰刘坚李旋郑琼娥

关键词：冷镦成形 Archard磨损理论内六角冲头模具磨损锥面角度冲头硬度进给速度

分类号：TG375

出版年,卷(期):页码：2022,47(9):1-6

摘要：

为了减少某车用内六角螺栓头部冷镦成形冲头的磨损量，基于Archard磨损理论对其进行了研究。以降低冲头磨损量为主要目标，选取冲头的锥面角度、冲头硬度、摩擦因数、进给速度为试验因素，设计了L16(44)正交试验并采用DEFROM进行了有限元仿真。通过对试验结果进行极差分析与方差分析，得到各因素对于冲头磨损的影响程度顺序为：冲头锥面角度>冲头硬度>摩擦因数>进给速度；最优工艺参数组合为：冲头锥面角度为25°，冲头硬度为67 HRC，摩擦因数为0.10，进给速度为100 mm·s-1，在最优参数组合下，冲头的磨损量由3.39 ×10-6 mm降低至2.16×10-6 mm。研究结果表明，冲头磨损主要发生于冲头锥面与冲头韧带的连接处，优化后的工艺参数使冲头的磨损量降低，对同类型冲头磨损的研究具有参考意义。

In order to reduce the wear amount of the cold upsetting punch at the head of hexagonal bolt for a vehicle, the Archard wear theory was used to research it. Then, taking reducing the punch wear amount as the main objective and selecting cone angle of punch, punch hardness, friction factor and feeding speed as the test factors, L16(44) orthogonal test was designed, and finite element simulation was performed by DEFROM. Furthermore, the influence degree order of each factor on the punch wear was obtained by the range analysis and variance analysis of the test results,that is cone angle of punch>punch hardness>friction factor>feeding speed, and the optimal process parameter combination was the punch cone angle of 25°, the punch hardness of 67 HRC, the friction factor of 0.10, and the feeding speed of 100 mm·s-1. Under the optimal parameter combination, the wear amount of punch was reduced from 3.39×10-6 mm to 2.16×10-6 mm. The results show that the punch wear mainly occurs at the connection between conical surface of punch and ligament of punch. Thus, the optimized process parameters reduce the wear amount of punch, which has reference significance for the research on the wear of the same type of punch.

基金项目：

国家自然科学基金创新研究群体基金资助项目(51621004)

莫杰(1996-)，男，硕士研究生 E-mail：mojie@hnu.edu.cn 通信作者：刘坚(1975-)，男，博士，教授，博士师导师 E-mail：liujian0108@vip.163.com

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