基于Archard理论的汽车板件热冲压模具磨损分析  

Wear analysis on hot stamping die for automobile panel based on Archard theory

作　　者：郑小慧[1] Zheng Xiaohui(Institute of Intelligent Manufacturing,Xinxiang Vocational and Technical College,Xinxiang 453000,China)

机构地区：[1]新乡职业技术学院智能制造学院,河南新乡453000

出　　处：《锻压技术》2021年第11期150-154,共5页Forging & Stamping Technology

基　　金：河南省高等职业院校创新发展项目(RW-28)。

摘　　要：以某汽车板件为研究对象,基于Archard磨损及塑性成形理论,采用DEFORM-3D软件对板件的热冲压成形过程进行了热力耦合仿真,模拟了模具表面的磨损情况。通过分析可知,凹模磨损远大于凸模磨损,寿命较短,并根据模拟结果讨论了影响凹模磨损的关键因素。在保证冲压板件质量及维持凸模磨损的前提下,以降低凹模表面磨损为目标,通过正交试验法研究了各因素对凹模工作表面磨损深度的影响关系并进行了优选。对获得的最优参数组合进行仿真模拟及实际试模,并与优化前结果进行了对比。结果表明,优化后凹模磨损与实际试模结果较为接近,与优化前凹模磨损结果相比得到明显改善。最优参数组合为:模具预热温度为350℃,坯料初始温度为500℃,冲压速度为15 mm·s^(-1),凹模硬度为64 HRC。采用有限元仿真技术能够有效地指导设计,降低试模成本。For a certain automobile panel,based on the theories of Archard wear and plastic forming,the thermo-mechanical coupling simulation for hot stamping process of plate was conducted by software DEFORM-3 D,and the wear condition of die surface was simulated.Through analysis,it is found that the die wear is much larger than that of the punch,and the service life is shorter.According to the simulation results,the key factors affecting the die wear were discussed.On the premise of ensuring the quality of stamping panel and maintaining the wear of punch,taking the reduction of the surface wear of die as object,the influences of various factors on the wear depth of die working surface were studied by orthogonal test method,and the optimization was carried out.In addition,the optimal combination of parameters was simulated and tested,and compared with the results before optimization.The results show that the optimized die wear results are close to the actual die test results and are significantly improved compared with the results before optimization,and the optimal combination of parameters is as follows:the die preheating temperature is 350℃,the billet initial temperature is 500℃,the stamping speed is 15 mm·s^(-1)and the die hardness is 63 HRC.Thus,the finite element simulation technology can effectively guide the design and reduce the cost of die test.

关 键 词：Archard磨损理论 热冲压 正交试验 凹模磨损 磨损深度 

分 类 号：TG386.3[金属学及工艺—金属压力加工]