锻压技术

变速器花键主轴贯通式冷挤压成形

英文标题：Through-type cold extrusion forming for transmission spline spindle

单位：1.重庆理工大学机械工程学院 2.重庆理工大学汽车零部件制造及检测技术教育部重点实验室 3．重庆理工大学车辆工程学院

分类号：TG376

出版年,卷(期):页码：2022,47(12):115-121

摘要：

针对载重汽车变速器花键主轴在传统切削加工时生产效率低的问题，考虑开式冷挤压的缺点，提出了贯通式冷挤压成形工艺方案。借助DEFORM-3D有限元仿真分析软件，研究了坯料定位精度、凹模定径带、凹模入模半角和模具间隙对金属流动的影响规律，模拟结果表明：当凹模定径带长度为26 mm、凹模入模半角为28°、凸模直径为Φ46 mm时，花键主轴在成形过程中的弯曲变形量较小，成形质量良好。最后采用贯通式冷挤压成形方案进行工艺试验，得到的挤压件的成形质量和尺寸精度均可满足设计要求，试验证明该工艺方案切实可行，数值模拟结果对工艺试验具有一定的参考价值。

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.

基金项目：

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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