基于动态磨损模型的汽车覆盖件模具磨损数值模拟研究  

Numerical Simulation of Die Wear of Automobile Covering Parts Based on Dynamic Wear Model

作　　者：赵妍洁 张双杰[1,3,4] 穆振凯 王伟 闫华军[1,4] 马世博 张永辉[1] ZHAO Yanjie;ZHANG Shuangjie;MU Zhenkai;WANG Wei;YAN Huajun;MA Shibo;ZHANG Yonghui(Hebei Key Laboratory of Material Near-net Forming Technology,Hebei University of Science and Technology,Shijiazhuang,050018;Hebei Automobile Stamping Die Technology Innovation Center,Botou,Hebei,062150;Hebei Automobile Stamping Die Engineering Research Center,Botou,Hebei,062150;Hebei Automobile Stamping Die Industrial Technology Research Institute,Botou,Hebei,062150)

机构地区：[1]河北科技大学河北省材料近净成形技术重点实验室,石家庄050018 [2]河北省汽车冲压模具技术创新中心,泊头062150 [3]河北省汽车冲压模具工程研究中心,泊头062150 [4]河北省汽车冲压模具产业技术研究院,泊头062150

出　　处：《中国机械工程》2024年第3期515-523,共9页China Mechanical Engineering

基　　金：国家自然科学基金(52205353);河北省高层次人才项目(A202101016);河北省创新能力提升计划(225A2201D)。

摘　　要：针对某铝合金覆盖件冲模磨损失效问题,为更加准确地预测汽车覆盖件模具的使用寿命,基于Archard磨损模型建立了动态磨损模型。该模型耦合了动态磨损系数和表面硬度变化曲线,其中,磨损系数K转化为随接触压力和相对滑移速度变化的动态磨损系数,表面硬度考虑了磨损深度的变化。利用Python语言对ABAQUS软件进行二次开发,将动态磨损模型耦合到有限元模拟中,实现了考虑磨损系数和硬化层深度变化的汽车覆盖件模具磨损计算。通过对比分析凸凹模典型位置在成形过程中的动态磨损演化规律,并以模具最大磨损深度0.5 mm作为失效判据,得到该铝合金覆盖件冲压模具的使用寿命为635428次。模具主要发生磨损的位置集中在模具合模线附近和大圆角处,在实际生产中需要对这些位置进行修模、调试,从而有效延长模具的使用寿命。In order to predict the service life of automotive cover dies,the Archard wear model was optimized to establish a dynamic wear model.The model coupled the dynamic wear coefficient and the surface hardness change curve.This model converted the wear coefficient K into a dynamic wear coefficient that varied with contact pressure and relative slip velocity,the surface hardness was converted into a dynamic hardness curve that varied with the depth of wear.Then,the Python language was used to develop the ABAQUS software for a second time,and the dynamic wear model was coupled to the finite element simulation,and the wear calculation of the die of automotive covering parts considering the wear coefficient and the depth change of the hardened layer was realized.By comparing and analyzing the dynamic wear evolution law of the typical positions of the convex and concave die during the forming processes,and taking the maximum wear depth of the die as the failure criterion,the service life of the stamping die of the aluminum alloy cover is 635428 times.The main wear of the die was concentrated near the die clamping line and at the large rounded corner,and these positions need to be repaired and debugged in actual production,which may extend the service life of the die effectively.

关 键 词：汽车覆盖件模具 模具寿命 模具磨损 动态磨损模型 

分 类 号：TG306[金属学及工艺—金属压力加工]