摘要
针对冲压成形过程中模具磨损及零件表面黏模等问题,以DP780高强度钢板U型弯曲成形为例,采用有限元数值模拟及工艺试验相结合的方法,对弯曲成形模具凹模圆角区域进行磨损区域预测及凹模圆角优化设计。研究结果表明:基于FEM-Archard磨损模型预测的弯曲成形黏模区域与试验结果相吻合;凹模圆角和形状对模具圆角表面磨损深度影响很大,凹模圆角半径越大,磨损深度越小;偏差-椭圆弧比标准圆弧、椭圆弧具有更好的抗成形黏模性能。
Considering that there are die failures and workpiece surface damages in sheet metal forming process,wear depth prediction and die fillet optimization in U-bending process with DP780 high strength steel sheet were investigated by finite element method(FEM)numerical simulation and experiments.The results show that the prediction of galling zone by FEM?Archard wear model agrees with the experimental result.The wear depth on die surface is influenced by the die fillet radii and shape.The wear depth decreases with the increase of the die fillet radii,and the shape of deviant-elliptic arc has the best anti-galling performance.
作者
董文正
温俊杰
徐令
林启权
李落星
DONG Wenzheng;WEN Junjie;XU Ling;LIN Qiquan;LI Luoxing(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第11期2692-2699,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51605408
51575467)
汽车车身先进设计制造国家重点实验室开放基金资助项目(31515011)~~
关键词
DP780高强钢板
弯曲成形
磨损深度
曲形优化
DP780 high strength steel sheet
bending
wear depth
optimization of die fillet
