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引用次数: 7
摘要
本文研究了在毛坯中心-凸缘区域叠加热梯度的5083铝合金圆柱件热拉深工艺。近年来,应用高温成形工艺对提高成形性能的重要性日益引起人们的关注。作为案例研究,在室温(RT)至0.9熔点的三种速度下(60、200和378 mm min - 1)进行了实验和数值测试,灵感来自AA5083在高温条件下非凡的超塑性行为的出现。重点研究了成形速度对冲床载荷、厚度分布和磨损行为的影响。为了研究极限拉伸比和温度梯度,进行了有限元模拟。实验表明,随着温度的升高,耳朵的数量和位置保持不变,而耳朵的高度下降。在550℃时,极限拉伸比达到2.84。
The non-isothermal hot deep drawing of AA5083 aluminum alloy
The present work is focused on the hot deep drawing process for cylindrical 5083 aluminum alloy parts, by superimposing a thermal gradient between the blank center-flange region. The imprtance of application of forming processes at elevated temperatures, in improving the formability, has increasingly attracted attention in recent years. As a case study, the experimental and numerical tests were performed at three speeds (60, 200 and 378 mm min−1) from room temperature (RT) up to 0.9 melting point, inspired by the advent of extraordinary superplastic behavior of AA5083 in hot condition. In particular, the focus was on the effects of forming speed on punch load, thickness distribution, and earing behavior. Finite element simulations were run in order to investigate the limiting drawing ratio and temperature gradient. The tests highlight that by increasing the temperature, the number and the position of the ears are constant, while the height of ears decreases. Furthermore, limiting drawing ratio equal to 2.84 is reached at 550 °C.
期刊介绍:
An International Journal on Mechanical Sciences and Engineering Applications
With papers from industry, Research and Development departments and academic institutions, this journal acts as an interface between research and industry, coordinating and disseminating scientific and technical mechanical research in relation to industrial activities.
Targeted readers are technicians, engineers, executives, researchers, and teachers who are working in industrial companies as managers or in Research and Development departments, technical centres, laboratories, universities, technical and engineering schools. The journal is an AFM (Association Française de Mécanique) publication.