汽车后风挡横梁冲压工艺仿真分析与优化设计  

Stamping process simulation analysis and optimization design for a car-rear-windshield-cross beam

作　　者：刘斐然 纵荣荣 李乐乐 李梦薇 鹿荣贵 李海鹏[1,2] LIU Feiran;ZONG Rongrong;LI Lele;LI Mengwei;LU Ronggui;LI Haipeng(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Tianjin Jinliyan Automobile Engineering and Technology Co.,Ltd.,Tianjin 300392,China)

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]天津金力研汽车工程技术有限公司,天津300392

出　　处：《河北工业大学学报》2020年第3期55-62,共8页Journal of Hebei University of Technology

基　　金：河北省科技支撑计划(13211027);大学生创新创业训练计划(201810080231)。

摘　　要：以某汽车后风挡横梁为研究对象,通过UG软件建立产品的三维数模,结合产品的结构特点及冲压工艺分析,拟定其冲压方案为拉延、修边冲孔和翻边冲孔。基于Dynaform有限元分析平台,对其拉延成型过程进行有限元数值仿真,获得了润滑条件、拉延速度、拉延筋、模具间隙对拉延成型质量的影响,并采用正交实验方法对各工艺参数进行优化设计,确定了最优的工艺参数组合:拉延速度为1 000 mm/s,压边力为420 kN,坯料与凸模间摩擦系数为0.075 (半干摩擦),坯料与凹模间摩擦系数为0.05 (边界摩擦),模具间隙为1.2 mm。模拟结果表明,采用优化后的冲压工艺参数可以有效预防零件的起皱、开裂等缺陷。The car-rear-windshield-cross beam was adopted as the research object.With its 3D digital model established by UG software and considering the structural features and technical analysis of the product,the stamping process plan was determined as drawing,trimming&piecing and flanging&piecing.The finite element numerical simulation of the drawing process was performed by the Dynaform finite element analysis platform.The influence of blank-holder force,lubrication condition,drawing speed,drawbead and die clearance on the forming quality were obtained.Then orthogonal experimental method was applied to optimize its process parameters and determine the optimal combination of process parameters,that is,draw speed of 1000 mm/s,blank-holder force of 420 kN,friction coefficient between blank and punch of 0.075(semi-dry lubrication),friction coefficient between the blank and the die of 0.05(boundary lubrication),and die clearance of 1.2 mm.The simulation results indicate that the optimized stamping process parameters can effectively avoid the defects of the part such as wrinkling and cracking.

关 键 词：后风挡横梁 冷冲压 工艺设计 数值模拟 正交实验 

分 类 号：TG386.1[金属学及工艺—金属压力加工]