Transactions of Materials and Heat Treatment

Title：Through-type cold extrusion forming for transmission spline spindle

Authors： Wang Jiangping1 Feng Wenjie1 2 Chen Fan1 Chen Yingying2 3 Song Yingde1 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 3. School of Vehicle Engineering Chongqing University of Technology

KeyWords： transmission spline spindle through-type cold extrusion bending deformation DEFORM-3D metal flow

ClassificationCode：TG376

year,vol(issue):pagenumber：2022,47(12):115-121

Abstract：

For the low production efficiency of traditional cutting process for spline spindle of truck transmission, the shortcomings of open-type cold extrusion were considered, and a through-type cold extrusion forming process scheme was proposed. Then, with the help of finite element simulation software DEFORM-3D, the influence laws of blank positioning accuracy, die sizing zone, half angle of die entry and die clearance on metal flow were studied. The simulation results show that when the length of die sizing zone is 26 mm, the half angle of die entry is 28°, and the punch diameter is Φ46 mm, the spline spindle has less bending deformation amount during the forming process, and the forming quality is good. Finally, the process test was conducted by the through-type cold extrusion forming scheme, and the forming quality and dimensional accuracy of the extruded parts met the design requirements. Thus, the test proves that the process scheme is feasible, and the numerical simulation results have certain reference value for process test.

Funds：

重庆市科委资助项目（cstc2014yykfA60001）；重庆市教委科学技术研究资助项目（KJI400944）

王江平（1997-），男，硕士研究生 E-mail：2545882436@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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