拖钩套筒复合冷挤压数值模拟与毛坯优化

Numerical Simulation of Combined Cold Extrusion and Blank Optimization for a Towing Hook Sleeve

将挤压模具视为刚体,采用有限元分析软件MARC,对拖钩套筒零件进行了冷挤压过程的数值模拟计算。根据各主要阶段等效应力及等效应变的分布,总结了挤压过程中金属材料塑性流动的规律。以最大挤压力为目标,对毛坯的尺寸进行了优化,为挤压工艺的改善提供了依据。根据计算结果,得出了挤压完成后零件所受最大主应力数值及其分布规律,为后期模具强度的研究奠定了基础。

Taking the extrusion die as a rigid body, cold extrusion of a towing hook sleeve was numerically simulated using the finite element software MARC. The law of plastic flow of metallic materials in the extrusion was found out based on the distribution of the equivalent stress and equivalent strain. And the size of the blank was optimized taking the maximum extrusion force as objective. The maximum principal stress and its distribution law of the part after extrusion was obtained in order to study the mould strength in the cold extrusion.