3D FE modeling method of die-less spinning process and its deformation progress analysis

• 1、The State Key Laboratory of Fluid Power Transmission and Control

Abstract：Die-less spinning, deriving from conventional spinning, eliminates the dependence of mandrel during the process, thus providing a wide potential in manufacture of complicated rotational parts. However, the lack of mandrel during the process also leads to a unique and partly unknown deformation progress. In this paper, an effective integrated 3D FE model has been built to simulate both forming and springback process of die-less spinning and the deformation progress during the process also has been analyzed. The results show that Solid element and Shell element each has its advantages in simulation of the blank. The former one gets better results in thickness simulation while the latter one is more appropriate in shape and springback simulation. Moreover, all nodes in the blank would experience three deforming states during the process: pre-deformed, over-deformed and springback state. Generally, the final part shows a springback phenomenon after process, because the amount of over-deformation is smaller than that of springback. However, when sharply angle changing appears in the roller traces, the amount of over-deformation may rise and become larger than that of springback, leading to an over-deformation phenomenon in the final part instead of springback.

Keywords： Die-less spinning, Solid element Shell element deformation progress