Research on laser-assisted shovel spinning forming of titanium alloy conical parts based on numerical simulation
Aiming at the problems of low material utilization,insufficient strength and toughness when the central flange conical parts were prepared by traditional'forging+machining',a laser-assisted shovel spinning forming process was proposed to realize the complete near-net forming of the central flange conical parts of titanium alloy.According to the principle of shovel spinning forming,a suitable laser heat source model was selected,and a laser-assisted shovel spinning finite element model was established based on the Simufact Forming software platform.The temperature,deformation behavior and equivalent plastic stress and equivalent plastic strain distribution of the central flange deformation zone during shovel spinning forming process were studied.The results show that the method of overall preheating+laser-assisted heating of the blank can achieve high temperature of the surface layer and low tem-perature of the inner layer of the blank matrix,which is not only beneficial to forming the flange of the surface metal material by shovel spinning,but also avoids the upheaval of the cone wall.The axial flow of the material in the deformation zone is more than that of the radial flow,and the shape of the flange is'pour drop'.The equivalent plastic stress value of the contact area of the roller is large,but the equivalent plastic stress value of the main part of the flange is small and evenly distributed.The equivalent strain value of the main deformation zone of the matrix is the largest,reaching 9-11,and gradually decreases along the thickness direc-tion,which has the characteristics of local large plastic deformation and uneven deformation.
titanium alloy conical partlaser-assistedshovel spinningplastic deformationstress and strain distribution
NETL
NSTL
万方数据
维普
