Transactions of Materials and Heat Treatment

Title：Cold extrusion forming process for truck planetary gear

Authors： Song Yingde1 Feng Wenjie1 2 Chen Yingying2 3 Wang Jiangping1 Qian Kai1

Unit： 1.College of Mechanical Engineering Chongqing University of Technology 2.Key Laboratory of Manufacture and Test Techniques for Automobile Part Ministry of Education Chongqing University of Technology 3.Vehicle Engineering Institute Chongqing University of Technology

KeyWords： truck planetary gear cold extrusion forming quality forming load

ClassificationCode：TG376

year,vol(issue):pagenumber：2023,48(7):123-129

Abstract：

Truck planetary gear is an important part of automobile transmission. At present, it is mainly manufactured by the method of hot forging hollow blank and cold extrusion forming external gear, and this method has the problems of long process route, high cost and high energy consumption, which seriously restricts the development and application of planetary gear. Therefore, to solve this problem, a one-time cold extrusion forming process for solid billet was proposed to reduce the processes related with hot forging and production costs, and the finite element model of the one-time cold extrusion forming process scheme of planetary gear was established. Then, the numerical simulation analysis was carried out by finite element software DEFORM-3D, and the influence laws of half angle of die entrance, length of sizing belt for die and cone angle of lower punch on the forming quality and forming load were studied. The results show that the forming quality is better when the half angle of die entrance is 60°, the length of sizing band for die is 12 mm and the cone angle of lower punch is 12°. According to the one-time cold extrusion forming process scheme, the process test is carried out, and the test results are good and meet the expected requirements, which confirms the feasibility of the scheme.

Funds：

重庆市科委资助项目（cstc2014yykfA60001）

作者简介：宋应德（1996-），男，硕士研究生 E-mail：1510717795@qq.com 通信作者：冯文杰（1964-），男，硕士，教授 E-mail：wjfeng@cqut.edu.cn

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