摘要
针对某动力电池壳首道次拉深成形过程中的起皱、破裂、厚度不均匀和模具接触力大的问题,提出了一种基于熵权的综合评价法对其进行多目标工艺参数优化来提高首道次成形质量。选取压边力、凹模圆角半径、凸模圆角半径、模具间隙、摩擦因数为影响因素,以最大减薄率、最大增厚率、最大凸模接触力、最大厚度差为评价指标,进行正交试验仿真。在此基础上应用熵值法和综合评价法,获得了最优的工艺参数组合,提高了动力电池壳首道次成形质量。
Aiming at the problems of wrinkling,cracking,uneven thickness,and large die contact force in the first deep drawing processes of a power battery case,based on entropy weight a comprehensive evaluation method was proposed to optimize the processing parameters of the first deep drawing processes,so as to improve the quality of the first deep drawing processes.Orthogonal experimental simulation was carried out with the influencing factors such as blank-holder force,die radius,punch radius,die clearance,and friction factor,and the evaluation index such as maximum reduction ratio,maximum thickness ratio,maximum limit punch contact force,and maximum differential thickness.Based on the applications of entropy value method and the comprehensive evaluation method,the optimum technological parameters combination was obtained,and the forming quality of the first passes of the power battery cases is improved.
作者
任振宝
曹春平
REN Zhenbao;CAO Chunping(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,210094)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2022年第13期1622-1628,共7页
China Mechanical Engineering
基金
江苏省重点研发项目(BE2015011)。
关键词
动力电池壳
首道次拉深成形
正交试验
熵权
综合评价
power battery shell
first deep drawing
orthogonal experiment
entropy weight
comprehensive evaluation