摘要
为解决弹壳平底成形后壳体底部内圆角过大和平底上冲子开裂的问题,提出了一套弹壳打凹-平底成形工艺参数多目标优化设计方法。首先,采用中心复合实验方法,以打凹成形下冲子的凸起高度、圆角及锥角和打凹成形弹壳连皮厚度为设计变量进行实验设计,以打凹下冲子最大等效应力、平底上冲子最大等效应力和平底成形后弹壳内圆角为优化目标,结合SVR与GWO算法构建了弹壳底部打凹-平底成形工艺参数优化模型。其次,采用MOPSO算法在可行域内寻优,并联合TOPSIS和CRITIC构建了综合评价指标计算得出最佳工艺参数组合。最后,采用优化工艺参数组合进行数值模拟和工艺实验,结果显示,模拟结果与实验结果吻合,弹壳底部内圆角充填饱满,同时可避免模具折断失效。
To solve the problems of large inner fillet at the bottom and the cracking of heading punch after heading of cartridge case,a set of multi-objective optimization design method for the indenting-heading process parameters of cartridge case was proposed.Firstly,using center composite experiment method,the experimental design was carried out with the convex height of indenting ejector,fillet of indenting ejector,cone angle of indenting ejector and web thickness of indenting of cartridge case as the design variables,the maximum effective stress of indenting ejector,the maximum effective stress of heading punch and inner fillet at the bottom of the cartridge case as the optimization objectives,SVR and GWO algorithms were combined to construct the optimization model of indenting-heading process parameters of cartridge case.Secondly,MOPSO algorithm was used to search for optimization in the feasible region,and combined TOPSIS and CRITIC to build a comprehensive evaluation index to calculate the best combination of process parameters.Finally,the numerical simulation and process experiment were carried out with the combination of optimized process parameters.The results show that the simulation results are consistent with the experiment results,and the inner fillet at the bottom of the cartridge case is full,and the heading punch fracture failure can be avoided.
作者
梁强
刘新
陶志勇
刘东
梁波
李登虎
LIANG Qiang;LIU Xin;TAO Zhi-yong;LIU Dong;LIANG Bo;LI Deng-hu(School of Mechanical Engineering,Chongqing Technology and Business University,Chongqing 400067,China;Chongqing Changjiang Electrical Appliances Industries Group Co.,Ltd.,Chongqing 401336,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第3期41-49,共9页
Journal of Plasticity Engineering
基金
重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX0473)
2021年度校内项目(2152026)。
关键词
弹壳
打凹成形
平底成形
参数优化
cartridge case
indenting
heading
parameter optimization
