Process factors influencing spinning deformation of
thin-walled tubular part with longitudinal inner ribs①
thin-walled tubular part with longitudinal inner ribs①
(1. School of Materials Science and Engineering, Harbin Institute of Technology,
Harbin 150001, China;
2. School of Materials Science and Engineering,
Hefei University of Technology, Anhui 230000, China)
Harbin 150001, China;
2. School of Materials Science and Engineering,
Hefei University of Technology, Anhui 230000, China)
Abstract: As a successively and locally plastic deformation process, ball backward spinning is applied for the purpose of producing thin-walled tubular parts with longitudinal inner ribs. By simplifying ball backward spinning as forward extrusion mechanics model, slab method is used in order to solve spinning force. Based on plastic mechanics, the influence of the process parameters involved on formability of inner ribs as well as the quality defects of spun parts is analyzed so as to present an approach to acquire the desired parts. The quality of inner ribs is one of the critical tasks in obtaining the desired spun workpieces and the height of inner rib depends greatly on spinning material, ball diameter, feed ratio, and wall thickness of tubular blank. The knowledge of the influence of process variables such as ball diameter, feed ratio, and wall thickness of tubular blank on the spinning process is essential to prevent the quality defects of the spun parts and obtain the desired spun parts.
Key words: ball spinning; power spinning; slab method; spinning force; spinning