汽车前轴制坯辊锻数值模拟与工艺分析

Blank-making Roll Forging Process and Numerical Simulation for Automotive Front Axle

采用基于热力耦合的刚粘塑性有限元法对汽车前轴制坯辊锻成形工艺进行了模拟,获得了汽车前轴制坯辊锻成形流动过程、力能参数曲线和工件及辊锻模具的温度场。阐述了制坯辊锻过程中工件和模具的温度变化趋势,明确了温度变化对工件初始温度的选择和对辊锻模具使用性能的影响,分析了具有礼帽形型槽的异形截面和上压力轧制方式对制坯辊锻工艺的影响和作用。

Blank-making roll forging process is simulated for automotive front axle, using a thermo-mechanical coupled rigid-plastic finite element method.Metal flow law and force-time curve and temperature fields of work-piece and dies are obtained. Then temperature variation scope of work-piece and dies during roll forging is proposed and the influence of temperature change on initial temperature choice of work-piece and usage property of roll die is expressed.Finally the groove with hat cross-section is analyzed an...