考虑压边间隙的电控永磁压边方法及有限元分析  

An EPM Blank Holder Method Considering Blank-holder Gaps and Finite Element Analysis

作　　者：孟林园 秦泗吉[1] 赵金志 唐子超 纪晓宇 MENG Linyuan;QIN Siji;ZHAO Jinzhi;TANG Zichao;JI Xiaoyu(School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004;CCCC Second Harbor Engineering Company Ltd.,Wuhan,430040)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]中交第二航务工程局有限公司,武汉430040

出　　处：《中国机械工程》2024年第12期2169-2176,2210,共9页China Mechanical Engineering

基　　金：国家自然科学基金(51675466,51175451)。

摘　　要：对不同厚度的板材进行拉深时会形成不同的压边间隙,在传统电控永磁压边工艺中,压边间隙中的介质为空气,在磁力加载时,压边间隙中的空气会形成磁回路气隙,导致磁力损耗。设计了一种将磁流变弹性体(MRE)作为聚磁介质填充到压边间隙中构建一种无磁路气隙的电控永磁压边方法,以减少磁力损耗。设计了一种具有36个磁极单元的压边力加载结构,并在不同压边间隙和不同磁力加载等级下进行有限元模拟,分析加入MRE后压边力的变化,并进行了实验验证。结果表明,MRE的加入能够有效提高压边力,随压边间隙增大提高效果显著,且加入MRE后并不影响压边力在板材压边区域的分布。以筒形件为实验对象进行拉深实验,验证了新工艺方法的可行性。When deep drawing sheets of varying thicknesses,different blank holder gaps were formed.In the traditional electrically controlled permanent magnet blank holding processes,the medium in the blank holder gaps was air,which created a magnetic circuit air gap during magnetic loading,leading to magnetic losses.A design for MRE was proposed as a magnetic medium to fill the blank holder gaps,creating an electrically controlled permanent magnet blank holding method without magnetic circuit air gaps,thereby reducing magnetic losses.A blank holding force loading structure with 36 magnetic pole units was designed,and finite element simulations were conducted under different blank holder gaps and varying magnetic loading levels to analyze the change in crimping forces with the addition of MREs on the blank holding force,followed by experimental validation.The results show that the addition of MREs may effectively enhance the blank holding forces with a more significant improvement as the blank holder gap increases,and the inclusion of MREs does not affect the distribution of the blank holding forces in the sheet blank holding areas.Deep drawing experiments were conducted using cylindrical parts as the experimental subjects,verifying that the new processing method is entirely feasible.

关 键 词：板材成形 电控永磁 磁流变弹性体 压边力控制 

分 类 号：TG386.41[金属学及工艺—金属压力加工]