Production mechanism of residual stress in spinning of thin wall cone parts with variable section

Abstract

Thin wall cone parts with variable section are mainly formed by spinning and are widely used in high-end fields such as Aeronautics, Astronautics, etc. [1, 2]. How to eliminate residual stress is essential to ensure that no deformation occurs during service process. In this paper, the superalloy GH1140 cone part is taken as the research object, the Simufact Finite Element (FE) software is used to systematically study the production mechanism of residual stress and the influence of residual stress on the structure and stability of the part during the forming process, the tangential residual stress in the shear spinning stage is mainly tensile stress, and the tensile stress value is the largest in the middle part of the shear spinning, the tensile stress of the conventional spinning is relatively large in the initial spinning stage, gradually transition to compressive stress. The residual stress of the part was tested by XRD and compared with the simulation results to verify the correctness of the model. The results provide a theoretical basis for improving the forming quality and service life of thin wall cone parts with variable section.