某高强钢汽车控制臂冲压成形工艺研究

Research on stamping process of a high strength steel automobile spring arm

以高强钢汽车控制臂为研究对象,根据制件的材料强度高、几何结构复杂和成形困难的特点,制定多道次冲压工艺方案,采用Autoform软件分析冲压成形过程,研究冲压成形工艺参数对零件最大减薄率和回弹的影响,结果表明:压边力越大,板料的最大减薄率越高;一定范围内,增大压边力可以减小回弹;摩擦因数越大,板料的最大减薄率越高;一定范围内,增大摩擦因数可以减小回弹。针对加工过程中回弹较大、拉延不对称的问题,对冲压工艺方案进行改进优化,最终有效减小了零件的回弹,控制了冲压件尺寸精度,采用CAE模拟优化了冲压成形工艺方案,并通过试验验证了优化后的工艺方案,试验结果与CAE仿真结果一致,成形质量达到产品要求。

Taking the high strength steel automobile spring arm as the research object,according to the characteristics of the parts of high material strength,complex geometric structure and difficult forming,the multi-pass stamping process scheme was developed.The stamping process was analyzed by Autoform software,and the influence of stamping process parameters on the maximum thinning rate and springback of parts was studied.The results show that the greater the blanking force,the higher the maximum thinning rate of the sheet metal.As the blank holder force increases in a certain range,the springback is reduced.The greater the friction factor,the higher the maximum thinning rate of sheet metal.Increasing friction factor in a certain range can reduce springback.Aiming at the problems of large springback and asymmetric drawing in the processing process,the stamping parts process scheme was optimized and improved,and the springback of the part is effectively reduced,the precision of stamping dimension is controlled.The stamping process scheme was simulated and optimized by CAE,and the optimized process scheme was verified by test.The test results are consistent with the CAE simulation results,and the forming quality meets the product requirements.