Transactions of Materials and Heat Treatment

Title：Influence of ultrasonic vibration on expansion forming process and quality for 6061 aluminum alloy tube

Authors： Zhong Bin1 Hou Shangbu1 Yu Zhengyang2 Xie Jiahao1 Zhang Chuanwei1 Ding Chun1

Unit： (1.College of Mechanical Engineering Xi′an University of Science and Technology Xi′an 710054 China 2.College of Safety Science and Engineering Xi′an University of Science and Technology Xi′an 710054 China)

KeyWords： ultrasonic vibration tube expansion forming load dimensional accuracy surface quality

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2025,50(4):56-68

Abstract：

Abstract: The influences of high amplitude ultrasonic vibration and different expansion speeds on the forming accuracy and surface quality of small-diameter aluminum alloy tubes were explored during the expansion process. Firstly， using a specially designed forming experiment equipment for ultrasonic vibration expansion， the influences of different amplitudes and expansion speeds on forming load， wall thickness

thinning rate and springback amount were analyzed. Secondly， the surface quality of the formed aluminum alloy tube was evaluated by SEM and LCM microscopic observations， and the microhardness variations of tube were tested by using a microhardness tester. The results show that the decrease of forming load， wall thickness thinning rate and springback amount as well as microhardness increase firstly and then decrease with the increasing of ultrasonic amplitude， while the surface roughness decreases with the increasing of amplitude. The influences of expansion speed on the forming load， forming accuracy and surface quality are not significant. Thus， ultrasonic vibration not only reduces the forming load but also improves the forming accuracy and surface quality of aluminum alloy tubes.

Funds：

基金项目:陕西省创新人才推进计划-科技创新团队(2021TD-27)；国家自然科学基金资助项目(51705416)

作者简介：钟斌（1984-），男，博士，副教授

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