柔性夹钳拉形力加载与位移加载的数值模拟  

Numerical simulation of load force and load displacement in flexible clamp stretch forming

作　　者：彭赫力[1] 李明哲[2] 赵毕艳 杨学勤[1] 罗志强[1] 

机构地区：[1]上海航天精密机械研究所,上海201600 [2]吉林大学无模成形技术开发中心,吉林长春130025

出　　处：《锻压技术》2014年第9期127-130,共4页Forging & Stamping Technology

基　　金：欧盟第六框架国际合作项目(ASTS-CT-2006-030877)

摘　　要：阐述了柔性夹钳拉形原理,介绍了柔性夹钳拉形机的结构特点和夹钳运动的特点。基于有限元分析软件ABAQUS,建立了柔性夹钳拉形有限元模型。采用力加载和位移加载2种加载方式对球形件柔性夹钳拉形过程进行数值模拟,对2种加载方式下球形件的轮廓形状、拉伸应变和厚度差进行了对比分析。数值模拟结果表明,力加载和位移加载得到的成形结果基本一致,都能用于柔性夹钳拉形。以球形件为例在柔性夹钳拉形机上进行拉形实验,球形成形件表面光洁、轮廓形状好,验证了柔性夹钳拉形的可行性。The principle of flexible clamp stretch forming was expounded, and the structural features of flexible clamp stretch forming machine and the moving characteristics of clamp were described. The finite element model of flexible clamp stretch forming was set up based on the analysis software ABAQUS. The numerical simulations of flexible clamp stretch forming process for spherical part were conducted using load force and load displacement, respectively. Further, the outline shape, stretching strain and thickness difference of the spherical parts under two load methods were compared and analyzed. The results show that the forming results under load force and load displacement are roughly in agreement, so both can be used in flexible clamp stretch forming. The forming experiment of spherical parts was carried out on flexible clamp stretch forming machine which results in smooth surface and good shape, and finally verifies the feasibility of flexible clamp stretch forming.

关 键 词：拉形 柔性夹钳 力加载 位移加载 数值模拟 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]