After studying and analyzing the research results on the forming of spiral bevel gear at home and abroad, it is learned that for the driven spiral bevel gear of automobile rear axle, the main difficulty of its processing technology is that the shape of spiral bevel gear is complex, resulting in complex deformation in the precision forging process, difficult flow of blank in the cavity, difficult filling of tooth shape, and large deformation resistance in the precision forging process, resulting in large forming force and difficult forming. In view of the above problems, this paper mainly does the following work:
(1) The processing technology of driven spiral bevel gear of automobile rear axle is analyzed and the process flow is determined;
(2) Using CATIA v5r21 software, the three-dimensional mathematical model of automobile rear axle driven spiral bevel gear is established and its volume is calculated. According to the principle of constant volume in the process of plastic deformation, the three-dimensional mathematical models of final forging, pre forging, blank and die are designed and established;
(3) The three-dimensional finite element simulation software DEFORM-3D applied in this paper is introduced, and the three-dimensional finite element numerical simulation of precision forging process of driven spiral bevel gear of automobile rear axle is carried out with this software. The influence of forming process parameters (blank shape, forging temperature, forming speed, friction coefficient and die structure) on forging quality is analyzed, and the process is optimized;
(4) The precision forging process of driven spiral bevel gear of automobile rear axle is numerically simulated by using DEFORM-3D finite element simulation software, and the grid change, stress-strain distribution, temperature distribution, metal fluidity law and load in the forming process are analyzed to obtain various laws in the forming process and guide practical production.