板料冲压模具扩孔和渐进成形扩孔的对比分析

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (03): 394-398.

板料冲压模具扩孔和渐进成形扩孔的对比分析

杨大强，陆彬，徐栋恺，陈军

（上海交通大学模具CAD国家工程研究中心，上海 200030）

收稿日期:2013-09-02
基金资助:
国家自然科学基金资助项目（51075269）

Comparative Study on Conical Hole-Flanging of Sheet Metal by Conventional Die and Incremental Forming Process

YANG Daqiang，LU Bin，XU Dongkai，CHEN Jun

(National Engineering Research Center of Die and Mold CAD, Shanghai Jiaotong University, Shanghai 200030, China)

Received:2013-09-02

摘要/Abstract

摘要：

分别采用传统的锥形凸模和渐进成形工艺对板料的扩孔特性进行试验，其中渐进成形扩孔的工具轨迹根据传统冲压的锥形凸模的形状设计.探讨了工具轨迹对渐进成形扩孔特性的影响.结果表明：与传统冲压扩孔件相比，渐进成形扩孔件的厚度最薄处位于孔口向外偏置一定距离的圆周上，而不在孔口边缘；渐进成形扩孔件的变形模式为剪切变形和弯曲变形综合作用，扩孔件沿直径的厚度分布与初始板厚不满足正弦定理；与传统的模具冲压扩孔相比，渐进成形的扩孔率提高了24.4%.

关键词: 传统冲压, 板料渐进成形, 厚度分布, 变形模式

Abstract:

In order to compare deformation characteristics between conventional die and incremental forming in hole-flanging process, experimental studies were performed based on a conical shaped punch and generated toolpath in incremental sheet forming. In addition, material formability in incremental forming was analyzed by using different toolpath strategies. The results indicate that conical hole-flanging component by incremental forming has a thinnest place in the intermediate stage rather than the edge of the hole, compared with the conical hole-flanging component by conventional die, and the deformation of conical holeflanging the component by incremental sheet forming is a combination of in-plane shearing with bending around the perimeter of the flange. Therefore, the sine law cannot be used to estimate the final thickness of the component. In comparison to conventional die, the hole expanding rate increases by 24.4% in incremental forming.

Key words: conventional die, incremental forming, thickness distribution, deformation mode

中图分类号:

TG 386

杨大强，陆彬，徐栋恺，陈军. 板料冲压模具扩孔和渐进成形扩孔的对比分析[J]. 上海交通大学学报（自然版）, 2014, 48(03): 394-398.

YANG Daqiang，LU Bin，XU Dongkai，CHEN Jun. Comparative Study on Conical Hole-Flanging of Sheet Metal by Conventional Die and Incremental Forming Process[J]. Journal of Shanghai Jiaotong University, 2014, 48(03): 394-398.

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