锻压技术

基于正交试验六角螺栓温镦成形模具磨损分析及优化

英文标题：Analysis and optimization on mould wear in warm upsetting for hex bolt based on orthogonal experiment

作者：翁芸娴秦培亮赵亚平

单位：苏州农业职业技术学院

分类号：TG375

出版年,卷(期):页码：2019,44(9):122-126

摘要：

为解决六角螺栓温镦成形过程模芯磨损过快的问题，采用有限元分析软件Deform-3D对温镦成形整个过程进行模拟，分析得出模芯磨损的主要原因。然后在不改变模具结构和外形的情况下，采用正交试验方法，以降低模芯磨损为目标，选取成形温度、模具表面硬度、冲压速度、摩擦系数作为因素，设计3水平4因素正交试验。通过极差分析和方差分析得到各因素对模芯磨损影响的趋势以及最佳工艺参数组合为：成形温度为720 ℃，模具表面硬度为65 HRC，冲压速度为5 mm·s-1，摩擦系数为0.3，并予以重新计算，发现模芯磨损较优化前大幅降低。采用最优参数进行实际试模，结果与有限元分析结果一致，为模具磨损优化提供了一种新的思路。

In order to solve the problem of excessive core wear during warm upsetting of hex blot, the whole process of warm upsetting was simulated by finite element analysis software Deform-3D, and the main reasons of core wear were analyzed. Then, the orthogonal experiment was adopted to reduce the core wear without changing the mould structure and shape. Furthermore, the forming temperature, hardness of mould surface, stamping speed and friction coefficient were chosen as the factors, and the three-level four-factor orthogonal experiment was designed. Through range analysis and variance analysis, the influences of the factors on core wear and the optimal combination of parameters are obtained with forming temperature of 720 ℃, hardness of mould surface of 65 HRC, stamping speed of 5 mm·s-1 and friction coefficient of 0.3. After recalculating，the core wear is significantly reduced compared to that before optimization. Finally, the optimal parameters were used to the actual mould trial. The results are consistent with that of finite element analysis, which provides a new idea for mould wear optimization.

基金项目：

苏州农业职业技术学院青年提升计划项目(PPN 201412)

翁芸娴（1982-），女，硕士，讲师 E-mail：37744652@qq.com

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