基于Deform-3 D的车用下轴套零件冷挤压模具结构优化设计

摘要

The aim of this study was to analyze the fold defect on the surface of the part of automobile lower shaft sleeve during extrusion forming and optimize main forming parameters such as bottom outlet slope of upper die, inlet slope of lower die and extrusion depth. By using DEFORM 3D software, a systematic FEM simulation was conducted on the cold extrusion processing of automobile lower shaft sleeve. The unreasonable design of die structure in the extrusion process caused afflux-ion and fold at the die joint during forming. By optimizing die structure in the extrusion, the metal forming was well, and no folding phenomenon occurred, thus cold extrusion dies which could satisfy the requirement of practical production were obtained.%目的：分析挤压成形中车用下轴套零件成形表面出现的折叠缺陷，优化挤压上凹模的底部出口斜度、下凹模的入口斜度和挤压深度等主要成形工艺参数。方法采用DEFORM-3 D软件，对汽车下轴套零件的冷挤压成形工艺进行了系统的有限元数值模拟试验。结果挤压成形模具结构设计不合理，导致在成形过程中模具分型面处金属出现汇流并形成折叠。结论通过优化挤压模具结构，使金属成形良好，无折叠缺陷出现，最终获得了较为合理的冷挤压模具结构。