Analysis and Investigation of Trilateral Spinning Based on the Concentric Circle Trajectory

Abstract

Several researchers have developed various spinning methods to produce non-circular hollow parts. In this paper, an approach that the rollers revolve around the roller principal axis was used to generate a concentric circular trajectory to the spinning trilateral workpiece. The spinning simulation was performed in ABAQUS 2016/Explicit software. The trajectory of the roller is derived, and the distributions of the equivalent von Mises stress, equivalent strain, wall thickness of the workpiece in typical section and spinning force are obtained. The simulation experiment proves the feasibility of using the proposed spinning method to produce workpieces with trilateral cross-section. The results demonstrated that after seven passes, in the area where the roller unloads the workpiece and the area where the roller starts the forward pass, local wrinkling may be generated; the most vulnerable area of the workpiece is also located at the area where the roller starts the forward pass, while the overall thinning rate of the workpiece is below 21%. Compared with other existent non-circular spinning methods, this novel method could process non-circular parts with a high rotational velocity, while ensuring the roller processing trajectory with high accuracy. The application of this method will improve the efficiency of the process by more than 200% in theory, while ensuring workpiece quality