盒形件拉深法兰起皱补偿压边力计算方法  

Calculation method of wrinkle compensation blank holder force for box part drawing flange

作　　者：杜冰[1] 李扬 赵翀昊 刘凤华 崔海龙 陈星池 赵长财[1] DU Bing;LI Yang;ZHAO Chong-hao;LIU Feng-hua;CUI Hai-long;CHEN Xing-chi;ZHAO Chang-cai(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《塑性工程学报》2022年第10期72-83,共12页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52175367);河北省自然科学基金资助项目(E2020203181)。

摘　　要：以薄板单道次拉深矩形盒形件为研究对象建立模拟模型,根据能量法理论,得出补偿压边力的计算方法。模拟结果表明,皱脊发展分为衍生和皱脊高度快速增长两个阶段,结合板料弯曲积分点应力-应变路径分岔原理,当皱脊高度开始快速增长时,曲线分岔程度开始增大,将此时定义为盒形件起皱失稳的临界起皱时刻。利用数值模拟分析结果中的应力-应变数据,结合能量法求解出了法兰区抑制起皱所需的补偿压边力。结果表明,法兰区的补偿压边力是时刻变化的,在进入临界起皱时刻之后,补偿压边力呈现先增大后减小的趋势。综上所述,结合矩形盒形件拉深试验,利用模拟结果,结合能量法,可以求出有效的补偿压边力。The simulation model was established with the rectangular box part of single-pass drawing of thin plate as the research object.According to the energy method theory,the calculation method of compensation blank holder force was obtained.The simulation results show that the ridge development is divided into two stages of derivation and rapid growth of ridge height.Combined with the stress-strain path bifurcation principle of plate bending integral point,when the ridge height begins to grow rapidly,the degree of curve bifurcation begins to increase,which is defined as the critical wrinkling time of box part wrinkling instability.The stress-strain data in the numerical simulation analysis results were used to solve the compensation blank holder force required for suppressing wrinkling in flange area by combining with the energy method.The results show that the compensation blank holder force in flange area changes at any time.After entering the critical wrinkling time,the compensation blank holder force increases first and then decreases.In summary,combined with the rectangular box part drawing tests,using the simulation results,combined with the energy method,the effective compensation blank holder force can be obtained.

关 键 词：盒形件拉深试验 能量法 补偿压边力 起皱失稳 

分 类 号：TG386[金属学及工艺—金属压力加工]