变曲率网格式镁合金壁板级进压弯成形数值模拟及实验研究  

Numerical Simulation and Experimental Study on Progressive Bending of Magnesium Alloy Grid Panel with Variable Curvature

作　　者：王忠堂[1] 李艳娟[1] 柳泉 梁海成[1] 杨君宝[1] 刘永哲 Wang Zhongtang;Li Yanjuan;Liu Quan;Liang Haicheng;Yang Junbao;Liu Yongzhe(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学,辽宁沈阳110159

出　　处：《稀有金属材料与工程》2024年第11期3217-3223,共7页Rare Metal Materials and Engineering

基　　金：辽宁省应用基础研究计划项目(2023JH2/101300214)。

摘　　要：采用数值模拟方法研究了网格式镁合金壁板变曲率级进压弯成形工艺曲率半径的变化规律。完成了实验研究工作,获得了几种规格的变曲率网格式镁合金壁板部件,壁板曲率半径范围为205.67~72.56 mm。确定了合适的变曲率网格式镁合金壁板级进压弯成形工艺参数。结果表明,壁板部件曲率半径与压下高度有关,随着压下高度增大,壁板曲率半径随之减小。随着压下高度增大,模拟结果与实验结果的绝对偏差减小,相对误差随之增大。随着壁板曲率半径增大,绝对偏差随之增大,相对误差随之减小。对于镁合金变曲率内网格壁板,壁板曲率半径模拟值与实验值的最大相对误差为5.22%。对于镁合金变曲率外网格壁板,壁板曲率半径模拟值与实验值的最大相对误差为5.51%。采用母线直线度方法来评价镁合金壁板蒙皮表面内凹缺陷程度,随着壁板曲率半径减小,母线直线度偏差随之增大,母线直线度系数随之增大。当壁板曲率半径为72.56 mm时,母线直线度偏差最大值为0.083 mm,对应母线直线度系数最大值为0.237%。Numerical simulation method was used to study the variation law of curvature radius of magnesium alloy panel formed by progressive bending technology.The experimental research work was completed,and several specifications of magnesium alloy grid panels with variable curvature were obtained.The curvature radius of panel range was from 205.6 mm to 72.56 mm.The suitable process parameters for progressive bending of magnesium alloy panel with variable curvature were determined.The results show that curvature radius of panel is related to amount of press height.As press height increases,curvature radius of panel decreases.With increase in press height,the absolute error between simulation result and experimental result decreases,and the relative error increases.With increase in curvature radius,the absolute error increases and the relative error decreases.For internal grid panel of magnesium alloy,the maximum relative error is 5.22%.For outer grid panel of magnesium alloy,the maximum relative error is 5.51%.The generatrix straightness method was used to evaluate the degree of concave defects on surface of magnesium alloy panel.With decrease in curvature radius of panel,the generatrix straightness deviation increases,and the generatrix straightness coefficient increases.When the curvature radius of panel is 72.56 mm,the maximum deviation of generatrix straightness is 0.083 mm,and the corresponding maximum value of generatrix straightness coefficient is 0.237%.

关 键 词：镁合金 网格壁板 变曲率 级进压弯成形 

分 类 号：TG301[金属学及工艺—金属压力加工]