Numerical investigation of effects of deformation allocation on multi-pass conventional spinning process of curvilinear generatrix parts

Abstract

Deformation allocation has significant effects on the process of multi-pass conventional spinning, especially for the curvilinear generatrix parts. Three different patterns of deformation allocation for curvilinear generatrix parts, including equal max deformation, equal arc length, and equal axial distance, are proposed and defined. Roller path profiles are designed based on them respectively. A 3D elastic-plastic finite element model is developed to investigate the effects of deformation allocation on forming quality and efficiency of the multi-pass spinning of curvilinear generatrix parts, based on the designed paths. The results show that a reasonable deformation allocation in each pass can improve the efficiency of the process effectively. The equal max deformation pattern can lead to better wall thickness distribution and forming efficiency. However, the fittability of it is poorer, compared with the others. This phenomenon is more significant with the increase of pass number.