【摘要】 针对我国大型曲轴锻造中存在的精度低、加工余量大等问题 ,采用3维刚塑性有限元法模拟了曲轴 RR法镦锻成形过程。通过分析其塑性流动规律与特点 ,得出模具设计不合理是曲轴拐颊充不满的主要原因 ,提出了防止该成形缺陷产生的新的模具结构设计方案 ,从而为曲轴镦锻工艺及模具设计提供了科学依据更多还原

【Abstract】 In accordance with low precision and more remainder material in domestic forging of heavy crankshafts,the simulation for the RR upsetting process of crankshaft is carried out by 3D rigid-plastic FEM. The main reasons that make the crank hard to be filled are given through analysis of its plastic flow mode and features in the process, and a new scheme of die design to prevent from the defect generation is given. Thus,this offers a scientific basis for optimum design of the process and dies.更多还原