A Study into Spin-Forming Process of Internal Spline

Spin-forming is a new technique for manufacturing the rotationally symmetric component with internal teeth, such as internal spline and gear. In order to optimize the spin-forming process and improve the forming quality of internal spline, the critical issue, the effect of spin-forming process on product formation was investigated by processing experiments and finite element analysis. The result indicates that it is the flow pattern of metal and friction force in the spin-forming that causes forming defect of product; two pass spin-forming helps to improve the homogeneity of deformation for metal with good plasticity; for internal spline forming, a stepped process is a better spin-forming process compared to a non-stepped one.