锻压技术

基于正交试验的汽车哈克钉铆套冲孔工艺优化及模具磨损研究

英文标题：Research on punching process optimization and die wear for automobile Huck rivet sleeve based on orthogonal test

作者：朱倩倩刘臣富尤富仪

单位：江苏省连云港工贸高等职业技术学校交通运输系天津职业技术师范大学汽车与交通学院

分类号：TG386

出版年,卷(期):页码：2022,47(11):62-69

摘要：

为了解决哈克钉铆套冲孔工序中下冲棒磨损严重的问题，基于Deform-3D仿真平台，建立了铆套冲孔模型、材料断裂模型以及磨损模型。首先，采用正交试验法，以降低下冲棒磨损为主旨，对关键冲孔参数及下冲棒尺寸进行了优化，优化结果为：上模冲孔速度为20 mm·s-1，下冲棒硬度为65 HRC，顶角为10°，下冲棒圆角半径为0.6 mm。其次，引入涂层技术，研究了TiN、TiCN和TiAlN涂层对下冲棒的强化效果，结果显示：TiAlN涂层的抗磨损能力更强。最后，通过连续模拟，建立了下冲棒的寿命预测模型，对优化后各下冲棒的寿命进行了预测，并经实际冲孔试验进行了验证，结果表明：磨损严重部位与数值模拟结果一致，各下冲棒实际寿命与预测结果极其接近，误差均控制在5%以内，验证了结果的正确性。采用TiAlN涂层的下冲棒寿命可从17388件增加至39405件，有效地解决了铆套成形中冲孔工序模具寿命短的问题。

In order to solve the problem of serious wear for lower punch in the punching process of Huck rivet sleeve, the punching model of rivet sleeve, material fracture model and wear model were established based on simulation platform Deform-3D. Firstly, the key punching parameters and the size of lower punch were optimized by using the orthogonal test method to reduce the lower punch wear, and the optimization results were obtained as the upper die punching speed of 20 mm·s-1, the lower punch hardness of 65 HRC, the top angle of 10°, and the lower punch fillet radius of 0.6 mm. Secondly, the strengthening effects of TiN, TiCN and TiAlN coatings to lower punch were studied by introducing coating technology. The results show that the wear resistance of TiAlN coating is stronger. Finally, through continuous simulation, the life prediction model of lower punch was established, and the life of each lower punch after optimization was predicted, which was verified by the actual punching test. The results show that the seriously worn parts are consistent with the numerical simulation results, the actual life of each lower punch is very close to the prediction results, and the error is controlled within 5%, which verifies the correctness of the result. In addition, with TiAlN coating, the life of lower punch can be increased from 17388 pieces to 39405 pieces, which effectively solves the problem of short die life in punching process during the riveting sleeve forming.

基金项目：

江苏省职业教育教学改革研究课题（ZYB100）

作者简介：朱倩倩（1986-），女，学士，讲师，E-mail：zhuqq3318@126.com

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