Transactions of Materials and Heat Treatment

Title：Process scheme design on warm precision forging for spacer bush

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ClassificationCode：TG316.3

year,vol(issue):pagenumber：2021,46(5):1-6

Abstract：

It is difficult to form in the process for a spacer bush because it has eight special shaped tooth claws at the end. In order to solve this problem, two forming process schemes were proposed. Then, the forming process of spacer bush and the metal flow situation at the tooth claws under the above two schemes were simulated by the finite element analysis software, and their filling effects of tooth claws for two schemes were quantified and compared. The simulation results show that in the preliminary forming process scheme, the filling of tooth claw is dominated by axial extrusion, the metal flow is poor and the filling effect is not full, the outside filling of tooth claw is worse than that of inside, the maximum underfill height on the outside is about 1.5 mm, and the maximum underfill height on the inside is about 1.0 mm, which cannot meet the requirements of subsequent machining. Furthermore, in the improved process scheme, the filling method of tooth claw is a composite filling of metal axial extrusion and circumferential flow, and the maximum underfill height on the outside is reduced to 0.4 mm and the improvement effect is obvious. Thus, the trial products and the simulation results have good consistence by the improved process scheme, and the forgings can meet the design requirements of subsequent machining.

Funds：

重庆市模具技术重点实验室开放课题资助项目（MT201503）；成都理工大学工程技术学院基金项目（C122018011）

骆静（1983-），男，硕士，副教授 E-mail：beyondlj996@126.com

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