差厚板U形件工艺孔成形性能仿真  

Simulation of Process Hole Forming Performance for U-Channel Part of Tailor Rolled Blank

作　　者：胡贤磊[1] 朱永胜 支颖[1] HU Xian-lei;ZHU Yong-sheng;ZHI Ying(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第8期1080-1087,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52374381);辽宁省自然科学基金资助项目(2020-MS-079)。

摘　　要：以冷冲压差厚板U形件作为研究对象,通过有限元仿真分析了工艺孔的位置、数量、尺寸以及形状对成形性能的影响.结果表明,差厚板在薄区侧壁处开孔时有利于减少侧壁的残余应力;差厚板的回弹与工艺孔在板件中的位置分布关系不大,与工艺孔的数量、半径及形状有关.从成形性能和回弹影响角度考虑,工艺孔优先选差厚板U形件端部的厚区与过渡区区域,如果必须在侧壁开孔,优选侧壁薄区区域.在相邻区域,工艺孔的数量尽量不超过2个,工艺孔尺寸小一些更合适,工艺孔形状沿轧制方向距离越小越合适.Finite element simulations were used to analyze the influences of the position,number,size,and shape of process holes on the forming performance of cold stamping tailor rolled blank U-channel parts.The results indicated that tailor rolled blanks are advantageous in reducing residual stresses in the sidewalls when holes are positioned in the thin zone of the sidewalls.The springback of the tailor rolled blank was found to be less dependent on the distribution of process holes but more influenced by their number,radius,and shape.From the standpoint of forming performance and springback impact,it is preferable to locate process holes in the thick zone and transition zone areas at the end of the U-channel part of the tailor rolled blank.If holes must be drilled in the sidewall,the thin zone area is the preferred location.In adjacent areas,the number of process holes should ideally not exceed two,with smaller sizes being more suitable.A shorter distance along the rolling direction is also preferred for the shape of the process hole.

关 键 词：差厚板 工艺孔 U形件 冷冲压 成形性能 回弹 

分 类 号：TG156.2[金属学及工艺—热处理]