The closed forging process is adopted. After blanking, upsetting, punching and rolling of cylindrical bar, the ring with certain internal and external diameter is obtained, and then the precision forming of equal height spiral bevel gear is realized by final forging. In the precision forging process of equal high tooth spiral bevel gear, the structural design of precision forging die of equal high tooth spiral bevel gear is very important. Many factors such as precision forming process requirements, die life, positioning, fixing, guiding, output and so on must be comprehensively considered. This chapter uses UG / OpenGRIP secondary development language to carry out the automatic design of precision forging die for equal height spiral bevel gear.
Using UG / OpenGRIP secondary development tool, the three-dimensional design of precision forging die for equal height spiral bevel gear is carried out, and the automatic design module of precision forging die is developed. The main work contents are as follows:
(1) Through the design standard manual of precision forging die, the characteristics of forging structure and process flow, the structure of precision forging die is designed, including the selection of guide structure, the selection of fastening form, the design of tooth die and prestressed ring, and the two-dimensional design of precision forging die of equal height spiral bevel gear is realized.
(2) Aiming at the components of equal height tooth precision forging die, such as ejector rod, upper and lower modules, prestressed ring, backing plate, pressing ring, upper and lower die base, guide column and guide sleeve, the parametric automatic modeling methods are established respectively.
(3) Based on UG / OpenGRIP, the thread modeling subroutine is developed, and the parametric modeling method of thread hole and bolt is proposed, which can realize the fast and accurate modeling of thread hole and bolt in forging die design.
(4) Using UG / OpenGRIP secondary development language, the three-dimensional automatic modeling module of precision forging die for equal height spiral bevel gear is completed.