锻压技术

基于FEA的汽车用防振螺母近净成形加工技术

英文标题：Near-net-shape forming machining technology on automotive anti-vibration nut based on FEA

作者：陈正科汝春波

分类号：TH164；TG376.3

出版年,卷(期):页码：2022,47(11):42-49

摘要：

针对某汽车防振螺母性能差、凹槽底部容易断裂且制造成本高的问题，拟对传统制造工艺进行改进，提出了一种近净成形加工技术，并联合有限元模拟技术进行了辅助研究。通过压缩试验获得了35CrMo合金钢的室温力学性能，以此建立了准确的仿真材料模型；根据防振螺母的结构特征和使用特点，简单介绍了成形思路，制定了新的成形方案，并完成了冷镦阶段的成形模具设计；通过Deform3D对防振螺母的连续冷镦过程进行了模拟，综合分析了零件成形情况、载荷-行程曲线、等效应力分布等，确保了工艺过程和模具结构设计的合理性，有效地指导了最终的工艺试验，降低了生产风险。试验结果表明：采用新工艺生产的防振螺母性能稳定、凹槽质量好，有效地解决了企业当前面临的难题。

For the problems of poor performance, easy fracture at the bottom of groove and high manufacturing cost for an automobile anti-vibration nut, the traditional manufacturing process was improved, and a near-net-shape forming machining technology was proposed, which was combined with finite element simulation technology for auxiliary research. Then, the mechanical properties of 35CrMo alloy steel at room temperature were obtained by compression test, and an accurate simulation material model was established. According to the structural characteristics and use characteristics of anti-vibration nut, the forming idea was briefly introduced, a new forming scheme was formulated, and the forming mold design in the cold heading stage was completed. Furthermore, the continuous cold heading process of anti-vibration nut was simulated by Deform-3D, and the forming condition of part, load-stroke curve, equivalent stress distribution and other information were comprehensively analyzed to ensure the rationality of the process and mold structure design, which effectively guided the final process test and reduced the production risk. The test results show that the anti-vibration nut produced by the new process has stable performance and good groove quality, which effectively solves the current problems faced by enterprises.

基金项目：

江西省教育厅科学技术研究项目（GJJ202012）；江西科技学院校级自然科学项目（ZR1902）

作者简介：陈正科（1988-），男，硕士，讲师，E-mail：czk2618717czk@163.com

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