(1. 四川大学 制造科学与工程学院，成都 610065；
2. 西华大学 材料科学与工程学院，成都 610039)
摘 要: 基于修正的Archard磨损理论，利用数值模拟技术分析挤压成形阶段模具各个测量点的瞬时温度、压力和速度场的分布，研究挤出速度对模具磨损程度的影响。结果表明：随着铝型材挤出速度的增加，模具各个测量点的磨损量都随之增加；由于模具工作带入口的正压力和温度均较其他部位大，使其磨损量也是最大的，故成为模具失效的主要区域；整个挤压过程有5 000个阶段，当挤出速度为10 m/min时，P15点的总磨损量为1.45 mm，计算结果与实际情况基本吻合，为挤压工艺的制定提供了理论依据和参考。
关键字: 铝型材；挤出速度；磨损；Archard；数值模拟
（1 School of Manufacturing Science and Engineering, Sichuan University,
Chengdu 610065,China;
2 School of Materials Science and Engineering, Xihua University, Chengdu 610039, China）
Abstract:Based on modified Archard’s wear theory, a lot of usefu1 data were obtained by finite element software during the process of extrusion, including instantaneous temperature, pressure and velocity field of every node, and rules of wear amount under various extrusion velocities were obtained. The results indicate that with the increase of extrusion velocity, the wear amount of each measure point increases. Because normal pressure and temperature around the die land are higher, and wear amount is also higher than the other part of the die, the die land becomes main area of invalidation. If total amount of forming phase is 5 000 and the speed is 10 m/min, the total wear amount of P15 is 1.45 mm. All the results are in good agreement with actual conditions, therefore it provides theory basis and reference to make aluminum profile extrusion process.
Key words: aluminum profile; extrusion velocity; wear; Archard; numerical simulation
