薄壁水槽拉深变形规律研究及工艺优化  

Deformation law research and process optimization of thin-walled sink in deep drawing

作　　者：洪熠豪 吴菲 韩建霖 章争荣[1,2] 陈宇麒 李建平 莫炳俊 HONG Yi-hao;WU Fei;HAN Jian-lin;ZHANG Zheng-rong;CHEN Yu-qi;LI Jian-ping;MO Bing-jun(School of Material and Energy,Guangdong University of Technology,Guangzhou 510000,China;Guangdong Key Laboratory of Metal Forming and Forging Equipment Technology,Guangzhou 510000,China;Guangdong Yingao Kitchen Utensils Co.,Ltd.,Foshan 528000,China;Guangdong Metal Forming Machine Works Co.,Ltd.,Foshan 528000,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510000 [2]广东省金属成形加工与锻压装备技术重点实验室,广东广州510000 [3]广东樱奥厨具有限公司,广东佛山528000 [4]广东锻压机床厂有限公司,广东佛山528000

出　　处：《塑性工程学报》2024年第8期26-36,共11页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52175294,51705085);难成形金属薄壁件刚柔复合成形关键技术(2023XJZZ02)。

摘　　要：为解决几何形状复杂且不对称及采用3次拉深工艺成形的薄壁水槽模具制造及试模难度大和成本高的问题,研究了该水槽采用多道次拉深工艺时板料的变形规律,同时对其拉深工艺进行了优化。利用Dynaform有限元分析软件对薄壁水槽拉深一序、拉深二序和拉深三序进行数值模拟分析,研究了关键工艺参数对成形结果的影响规律并得出最优的工艺参数,最后通过拉深实验对该工艺方案进行了验证。根据工艺优化方案,得出了最优工艺参数。拉深一序:从0 s至0.01 s,压边力恒定40 kN,从0.01 s至拉深结束,压边力从40 kN线性增长至500 kN;凸模、凹模、压边圈与板料之间的摩擦因数分别为0.2、0.05、0.05;模具间隙为0.66 mm。拉深二序:凸模、凹模、压边圈与板料之间的摩擦因数分别为0.15、0.1、0.1;压边力为500 kN。拉深三序:采用合适的拉深筋布置方式及阻力值。实验结果表明,在不同拉深工序中分别侧重调控不同拉深工艺参数可以有效控制薄壁水槽的减薄量。To solve the problems of high difficulty and high cost in the mold manufacture and mold testing of the thin-walled sink with complicated and asymmetric geometrical shape formed by three-times deep drawing process,when the multi-pass deep drawing process was adopted to the sink,the deformation law of sheet metal was studied,and the deep drawing process were optimized.Dynaform finite element analysis software was used to carry out the numerical simulation analysis on the first sequence,the second sequence and third sequence of deep drawing for the thin-walled sink.The influence laws of key process parameters on the forming results were studied and the optimal process parameters were obtained.Finally,the process scheme was verified through the deep drawing experiments.According to the process optimization scheme,the optimal process parameters were obtained.The first deep drawing sequence:the blank holder force is maintained at 40 kN from 0 s to 0.01 s,and the blank holder force increases linearly from 40 kN to 500 kN from 0.01 s to the end of deep drawing;the friction factors between punch,die,blank holder and sheet are 0.2,0.05,0.05,respectively,and the die clearance is 0.66 mm.The second deep drawing sequence:the friction factors between punch,die,blank holder and sheet are 0.15,0.1,0.1,respectively,and the blank holder force is 500 kN.The third deep drawing sequence:appropriate drawbead arrangement and resistance value are adopted.The experimental results show that the thinning amount of the thin-walled sink can be effectively controlled by focusing on regulating and controlling different deep drawing process parameters in different deep drawing sequences.

关 键 词：数值模拟 拉深 薄壁结构 工艺优化 

分 类 号：TG306[金属学及工艺—金属压力加工]