母线立弯成形失稳翘曲研究  

Research on instability warpage of busbar in vertical bending

作　　者：陈丽 樊瑜瑾[1] 岳学虎 郑淮河 唐军 吴家喜 Chen Li;Fan Yujin;Yue Xuehu;Zheng Huaihe;Tang Jun;Wu Jiaxi(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China;Shenzhen Zhaowei Electromechanical Company Ltd.,Shengzhen 518000,China;Kunming Kunkai Special CNC Equipment Limited Liability Company,Kunming 650106,China;China Shipbuilding Industry Corporation 750 Proving Ground,Kunming 650051,China)

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500 [2]深圳市兆威机电股份有限公司,广东深圳518000 [3]昆明昆开专用数控设备有限责任公司,云南昆明650106 [4]中船重工750试验场,云南昆明650051

出　　处：《锻压技术》2021年第2期213-217,共5页Forging & Stamping Technology

摘　　要：运用弯曲成形理论与塑性力学知识,分析母线弯曲过程中翘曲的产生机理,并对其进行力学分析。利用能量法推导出临界压应力的解析表达式,研究发现,母线立弯时翘曲的发生与材料的力学性能和几何参数有关;进一步研究了厚度对压应力的影响后发现,随着厚度的增加,压应力增大,母线抵抗失稳翘曲的能力增强。通过对1060铝排进行立弯试验,得到材料厚度与翘曲的变化规律,验证了厚度对于母线失稳翘曲的影响,这与推导表达式的结果是一致的,这一研究为抑制母线立弯成形过程中产生的翘曲缺陷提供了理论依据,具有一定的参考价值。The generation mechanism of warpage in the bending process of busbar was analyzed by bending theory and plastic mechanics knowledge,and the mechanical analysis was carried out. Then,the analytical expression of critical compressive stress was derived by the energy method. And the study finds that the warpage of busbar during the vertical bending is related to the mechanical properties and geometric parameters of material. Furthermore,the influence of thickness on the compressive stress was researched. The results show that with the increasing of thickness,the compressive stress increases,and the ability of busbar resistance to instability and warpage is enhanced.Through the vertical bending test of 1060 aluminum busbar,the change laws of material thickness and warpage are obtained,and the influence of thickness on the instability and warpage of busbar is verified which is consistent with the result of derivate expression. Thus,the above study provides a theoretical basis for restraining the warpage defects in the vertical bending process of busbar and has a certain reference value.

关 键 词：母线 立弯 压应力 压缩失稳 翘曲 

分 类 号：TG386[金属学及工艺—金属压力加工]