基于Archard模型的铝合金盒形件热挤压模具磨损研究

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英文篇名：Research on Wear of Hot Extrusion Die of Aluminum Alloy Box Parts Based on Archard Model 作者：屈晓晓 ; 张治民 ; 李国俊 ; 于建民 英文作者：QU Xiaoxiao;ZHANG Zhimin;LI Guojun;YU Jianmin;School of Materials Science & Engineering, North University of China; 关键词：热挤压 ; 模具磨损 ; 数值模拟 英文关键词：hot extrusion;;die wear;;numerical simulation 中文刊名：SJGY 英文刊名：Hot Working Technology 机构：中北大学材料科学与工程学院; 出版日期：2019-05-14 15:24 出版单位：热加工工艺 年：2019 期：v.48;No.511 基金：国防基础科研项目(JSJC2013204B403) 语种：中文; 页：SJGY201909044 页数：5 CN：09 ISSN：61-1133/TG 分类号：161-165

摘要

基于修正后的Archard磨损模型,采用数值模拟研究了不同工艺参数对5A06铝合金复杂盒形件热挤压凸模磨损的影响。结果表明:凸模容易磨损的部位为圆角附近以及引流孔周围区域,凸模的最大磨损值随着挤压速度的增加而增大;当模具初始温度低于393℃时,凸模最大磨损值随着初始温度的上升而减小,当模具初始温度高于393℃时,凸模最大磨损值随着初始温度的上升而增大;当摩擦系数从0.15逐渐增加到0.23时,凸模最大磨损值逐渐减小,随着摩擦系数的进一步增加,凸模最大磨损值增大。最佳工艺参数为:模具预热温度393℃、挤压速度1 mm/s、摩擦系数0.23。在该参数下预计可有效生产产品62 000件。
        Based on the modified Archard wear model, the influence of different processes on the wear value of hot extrusion punch for 5A06 aluminum alloy complex box-shaped parts was studied by numerical simulation. The results show that the part of the punch that is easily worn is the area near the fillet and around the drainage hole. The maximum wear value of the punch increases with the increase of extrusion speed. When the initial die temperature is lower than 393℃, the maximum wear value of the punch decreases with the increase of the initial temperature. When the initial die temperature is higher than 393℃, the maximum wear value of the punch increases with the increase of the initial temperature. When the friction coefficient increases from 0.15 to 0.23, the maximum wear value of the punch decreases gradually, and with the further increase of friction coefficient, the maximum wear value of the punch increases. The optimum process parameters are die preheating temperature of 393℃, extrusion speed of 1 mm/s and friction coefficient of 0.23. It is expected that 62000 pieces of products can be produced efficiently under these parameters.

引文

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