摘要
针对冲击装置结构,探究底部直径、台阶直径、锥体底角等参数变化对其几何结构的影响。利用有限元仿真方法,考虑材料高应变速率和介质超弹性本构关系,建立磁场和变形场模型,分析冲击装置的结构参数对成形高度、应变速率和冲击速度的影响。结果表明:随底部直径减小,板材的成形高度和冲击装置的冲击速度增加,无台阶与小台阶下的成形高度接近,板材中心第1个应变速率峰值增加;台阶直径减小,更有利于提高冲击装置的冲击速度,提升成形高度;底部直径一定时,板材的成形高度随着锥体底角的减小趋于增加;底部直径减小到一定程度时,锥体底角对成形高度的影响不明显。
For impact device structure,the influences of parameters variation,such as bottom diameter,step diameter and cone bottom angle,on the geometry structure of impact device were researched,and considering the high strain rate of material and the medium hyperelastic constitutive relationship,the electromagnetic field and deformation field models were built by finite element simulation method.Then,the influences of structural parameters of impact device on the forming height,strain rate and impact velocity were analyzed.The results show that as the bottom diameter decreases,the forming height of sheet and the impact velocity of impact device increase,the forming height of no step is close to that of a small step,and the first strain rate peak value in the center of sheet increases.However,the decrease of step diameter is more conductive to improve the impact velocity of impact device and increase the forming height of sheet.When the bottom diameter is constant,the forming height tends to increase with the decreasing of cone bottom angle.When the bottom diameter is reduced to a certain extent,the influence of cone bottom angle on the forming height is not obvious.
作者
徐俊瑞
王少博
王元丰
Xu Junrui;Wang Shaobo;Wang Yuanfeng(School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Engineering Research Center of Ministry of Education of Advanced Light Metal Materials Development and Processing Protection,Hohhot 010051,China;Inner Mongolia Key Laboratory of Light Metal Materials,Hohhot 010051,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第4期48-55,共8页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51965050)
内蒙古自然科学基金资助项目(2021MS05004)。
关键词
磁脉冲成形
冲击介质
冲击装置
镁合金板材
底面直径
台阶直径
锥体底角
magnetic pulse forming
impact medium
impact device
magnesium alloy sheet
bottom diameter
step diameter
cone bottom angle
