关键词: 涡轮风扇发动机;粘性介质+;压力加工;铝合金;试验;数值仿真

Abstract: Aluminum alloy bowl-type parts of turbofan engine have large deformation in local zone, the parts obtained by traditional forming technology have some defects, such as serious wall-thickness reduction or low dimensional accuracy. Viscous pressure forming (VPF) is suitable for the forming of this kind of parts because of its unique characteristic. The main difference between VPF and the traditional sheet forming technology is that viscous pressure-carrying medium is used in VPF. The viscosity of the viscous medium is one of the most important factors that affect the deformation of sheet metal. The influence of the viscosity of viscous medium on the thickness distribution and limit forming height of aluminum alloy bowl-type parts were analyzed by the viscous pressure bulging experiments and numerical simulations. Aluminum alloy bowl-type parts with convex obtained by VPF were analyzed for turbofan engine. The research results show that the tangent adhesive force improves the thickness distribution uniformity and limits forming height of specimens. VPF is suitable for the forming of aluminum alloy bowl-type parts with convex, which have large deformation in local zone.

Key words: Turbofan engine;Viscous medium~+;Presswork;Aluminum alloy;Test;Numerical simulation