锻压技术

多夹钳式板材柔性拉形工艺的数值模拟

英文标题：Numerical simulation on multigripper flexible stretch forming process of sheet metal

作者：田永辉赵坤民陈梁玉

单位：1.合肥工业大学工业与装备技术研究院安徽合肥 230009 2.航空结构件成形制造与装备安徽省重点实验室安徽合肥 230009

分类号：TG306

出版年,卷(期):页码：2019,44(5):35-40

摘要：

多夹钳式柔性拉形工艺可克服传统拉形工艺存在的成形缺陷。研究了多夹钳式柔性拉形机的结构组成，分析了多夹钳式柔性拉形工艺的特点，分别选取S形曲面、马鞍形曲面和球形曲面，并利用有限元分析软件ABAQUS,对多夹钳式板材柔性拉形过程进行数值模拟分析。结果表明：在兼顾工件成形质量与拉形机研发制造难度的前提下，相对较高的夹钳离散化程度可提升S形工件的成形质量；相比于普通铰接方式，夹钳与液压缸之间采用球铰接方式时，马鞍形件有效成形区端部的成形质量更好；通过改善板料与模具之间的润滑条件，使球形件有效成形区板料的拉伸变形更充分，卸载回弹量更小。

Multigripper flexible stretch forming technology (MGFSFT) can overcome the forming defects existing in the traditional stretch forming technology. Therefore, the structural composition of multigripper flexible stretch machine was researched, and the characteristics of MGFSFT were analyzed. For Sshaped surface, saddleshaped surface and spherical surface, the multigripper flexible stretch forming process was simulated by finite element analysis software ABAQUS. The numerical simulation results show that considering the forming quality of part and the difficulty in research and manufacturing of stretch forming machine，the relatively high degree of clamp discretization can improve the forming quality of Sshaped part. Compared with the common hinge joint mode, adopting the spherical hinge joint mode between clamp and hydraulic cylinder can get better forming quality in the end of effective forming zone for saddleshaped part. By improving the lubrication condition between sheet metal and die, the effective forming zone of spherical part can be stretched more fully, and the springback is smaller.

基金项目：

国家自然科学基金资助项目（11472072，51775160）

作者简介：田永辉（1993－），男，硕士研究生 Email：yhtianstudy@sina.com 通讯作者：赵坤民（1971－），男，博士，教授，博士生导师 Email:kmzhao@dlut.edu.cn

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