System Analysis of Cold Axial Rotary Forging of Thin-Walled Tube Blanks

Abstract

The paper presents the results of a system analysis of the process of cold axial rotary forging of parts from thin-walled tube blanks with a conical roll. The technology is designed for manufacturing axisymmetric hollow parts of various shapes. A feature of the process is the possible loss of stability of the shape of the tube blanks, which does not allow getting the parts of the required geometry. On the basis of experiments and computer simulation of the process, six types of metal flow of the tube blank during rotary forging are determined, three of which are associated with the loss of stability of the tube blank. The main ten parameters that affect the technological process, including the kinematic characteristics of the machine and the geometric parameters of the tube blanks are systematized. Only three parameters can actually be used to control the metal flow. Recommendations are offered to reduce the time of adequate computer simulation of metal flow when forming tube blanks in the Deform 3D complex, which is used to determine the rational values of the parameters of a stable rotary forging process.