引言冷挤压工艺是一种少无切屑加工的先进工艺,而模具寿命是决定其经济效果的重要因素。凹模是模具中的主要零件,因此对凹模受力情况进行分析是模具强度研究的主要课题。过去国内外一些学者用不同的方法进行了实验研究,以找出在挤压过程中凹模内壁压力的变化和分布情况。普罗佐罗夫对正挤实心件在挤压过程中凹模内壁压力进行了测量,采用的方法是将凹模横向分割成几个金属环,贴以电阻应变片,测出电阻变化推算出凹模内壁的压力。由于 Introduction Cold extrusion process is a less advanced technology without chip processing, and die life is an important factor in determining its economic effect. Die is the main part of the mold, so the die force analysis of the mold strength is the main issue of study. In the past, some scholars at home and abroad conducted experiments with different methods to find out the variation and distribution of pressure on the inner wall of the die during extrusion. Prozorov on the extrusion of solid parts in the extrusion process of the inner wall of the die wall pressure was measured by the die is divided into several horizontal cross-section into several metal rings, attached to the strain gages, measured changes in resistance deduced concave Die wall pressure. due to