(1. 四川大學(xué) 制造科學(xué)與工程學(xué)院，成都 610065；
2. 西華大學(xué) 材料科學(xué)與工程學(xué)院，成都 610039)
摘 要: 基于修正的Archard磨損理論，利用數(shù)值模擬技術(shù)分析擠壓成形階段模具各個(gè)測(cè)量點(diǎn)的瞬時(shí)溫度、壓力和速度場(chǎng)的分布，研究擠出速度對(duì)模具磨損程度的影響。結(jié)果表明：隨著鋁型材擠出速度的增加，模具各個(gè)測(cè)量點(diǎn)的磨損量都隨之增加；由于模具工作帶入口的正壓力和溫度均較其他部位大，使其磨損量也是最大的，故成為模具失效的主要區(qū)域；整個(gè)擠壓過(guò)程有5 000個(gè)階段，當(dāng)擠出速度為10 m/min時(shí)，P15點(diǎn)的總磨損量為1.45 mm，計(jì)算結(jié)果與實(shí)際情況基本吻合，為擠壓工藝的制定提供了理論依據(jù)和參考。
關(guān)鍵字: 鋁型材；擠出速度；磨損；Archard；數(shù)值模擬
（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
