Research On Asymmeterical Spinning Process

Spinning is an advanced non cutting plastic forming technology, and it is one of prior process in forming of thin-wall revolving body part. In order to break the limitation of traditional axisymmetric, this paper focuses on asymmetric workpiece, especially the forming characteristics of truncated oblique cone shear spinning. Through the discretization of spinning theory path, the formulas of roller position are derived. Due to the particularity of asymmetrical parts on the shape, synchronization spinning technology is used in this process coordinating the feed movement of roller and the main spindle. In order to research the influence factors of forming quality, numerous experiments are designed, and forming quality is different under various rotation increment angle, roller feed rate, nose radius and half cone angle. In addition, the wall thickness, radial and axial strain are measured and the forming mechanism can be analyzed. At the same time, with the help of the finite element numerical simulation software ANSYS/LS-DYNA to carry out finite element analysis about the spinning process, and draw relevant conclusions about stress, strain and thinning ratio. Through comparing test results with simulation results, the forming characteristic of asymmetrical part is analyzed in detail.In this paper, using the combination method of experiment and numerical simulation of the process, the forming mechanism of asymmetric hollow part spinning is explored, achieving the purpose of preventing the defect of the products, and guiding practice. The study lay the foundation for the subsequent more irregular part, has higher theoretical significance and application value.