H420LAD钢横梁零件翻边开裂原因分析及优化  

Cause Analysis and Optimization of Flange Cracking for Cross Member of Steel H420LAD

作　　者：田志俊[1] 崔磊[1] 陈德顺[1] 刘阳 谷海容[1] 李轶伦 Tian Zhijun;Cui Lei;Chen Deshun;Liu Yang;Gu Hairong;Li Yilun(Technology Center,Maanshan Iron&Steel Co.,Ltd.,Maanshan 243000;No.4 Steelmaking and Rolling General Plant,Maanshan Iron and Steel Co.,Ltd.,Maanshan 243000)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,马鞍山243000 [2]马鞍山钢铁股份有限公司四钢轧总厂,马鞍山243000

出　　处：《汽车工艺与材料》2024年第1期31-37,共7页Automobile Technology & Material

摘　　要：针对H420LAD钢横梁零件翻边开裂的问题,对横梁零件进行了冲压仿真,从翻边类型、主次应变、应变路径等方面对方案进行评估。结果表明,次应变是影响零件翻边开裂的主要参数,降低次应变有利于改善翻边开裂问题,材料优化的方向是提高材料的塑性应变比。提出了2种冲压工艺方案并仿真,优化模具间隙、翻边刀块到底距离等,零件成形安全裕度由0%增至4.49%,边部质量略有改善;优化板料形状、预翻边工序改为拉延、增加修边工序,零件成形安全裕度由0%增至16.44%,零件冲压合格率100%。For the problems of flange cracking for cross member of steel H420LAD,the stamping simulation of cross member was performed,the scheme was evaluated on type of flange,major and minor stain,paths of strain.The results show that minor stain was the main parameters of parts flanging and cracking,the decrease of minor strain was beneficial to eliminating flange cracking,increasing the plastic strain was the direction of material optimization.2schemes to stamp processing were proposed and simulated,the results show that after optimization of the gaps between die and punch,the distances between the blocks for flanging and the punch,the forming safety margin was increased from 0% to 4.49%,the edge quality of part was improved slightly.The optimization of blank was carried out,the process of pre-flanging was changed to drawing,process of trimming was added,the forming safety margin was increased from 0% to 16.44%,and the qualified rate of the parts is 100%.

关 键 词：低合金高强钢 翻边成形 翻边开裂 应变 零件成形安全裕度 

分 类 号：U465.11[一般工业技术—材料科学与工程]