Transactions of Materials and Heat Treatment

Title：Numerical simulation of dimple in flexible clamp multi-point stretch forming

Authors： Peng Heli Li Mingzhe Li Zhongquan Zhang Xiaolong Yu Yaping

Unit： Shanghai Spaceflight Precision Machinery Institute Jilin University

KeyWords： multi-point forming stretch forming flexible clamp dimple numerical simulation

ClassificationCode：TG306

year,vol(issue):pagenumber：2014,39(12):22-26

Abstract：

Forming principle of flexible clamp multi-point stretch forming was elaborated, and finite element model of flexible clamp multi-point stretch forming was set up. The numerical simulations of dimple for spherical parts formed by flexible clamp multi-point stretch forming were carried out, and the effects of material, pre-stretching ratio, radius-thickness ratio and polyurethane thicknesses on the dimple of spherical parts were studied. The results show that dimple can be described by thickness strain: the larger the yield strength and the pre-stretching ratio are, the larger the radius-thickness ratio is in the case of constant thickness, the smaller the radius-thickness ratio in the case of constant radius or the thicker the polyurethane is, the slighter the dimple is The flexible clamp multi-point stretch forming experiments were conducted. The results show that the surface of spherical part exists is gentle dimple, and the surface accuracy of spherical part is good when the polyurethane thickness is 20mm.

Funds：

欧盟第六框架国际合作项目 (ASTS-CT -2006-030877)

彭赫力（1986-），男，博士，工程师

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