6063铝合金中空构件充液压形成形  

Low-pressure hydroforming for 6063 aluminum alloy hollow component

作　　者：林才渊 初冠南[1] 林艳丽[1] LIN Cai-yuan;CHU Guan-nan;LIN Yan-li(School of Materials Science ＆ Engineering,Harbin Institute of Technology（Weihai）,Weihai 264209,China)

机构地区：[1]哈尔滨工业大学(威海)材料科学与工程学院

出　　处：《塑性工程学报》2018年第4期46-52,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51475121;51405102)

摘　　要：为促进铝合金中空构件在汽车上的应用与推广,分别采用数值模拟和实验验证研究了铝合金中空构件在室温下充液压形的可行性,分析了内压对成形结果的影响,总结了成形过程中出现的主要缺陷形式及每个缺陷的发生原因。结果表明充液压形在室温下成形铝合金中空构件是具有可行性的,同时成形时所需内压较低,室温成形时所需压力仅为2-10 MPa。失稳弯曲和死皱是充液压形的主要缺陷形式。适当增大内压可消除失稳弯曲缺陷,控制坯料的膨胀变形即可消除死皱缺陷。虽然弯矩是压形的主驱动力,但对于铝合金而言,当其内压增大至6 MPa时,其成形件的回弹量很小几乎可以忽略。To promote the application of aluminum alloy hollow components in automobile bodies,a forming technology at room temperature,named as low-pressure hydroforming,was investigated and verified. Experiments and simulations were conducted to reveal the effects of internal pressure and the main defects in forming process and the causes of each defect were summarized. The results indicate that aluminum alloy hollow component can be formed successfully at room temperature by low-pressure hydroforming technology. The forming pressure is low,and the required pressure at room temperature is only 2-10 MPa. Unstable buckling and dead wrinkles are main defects among low-pressure hydroforming. Unstable buckling defects can be eliminated by increasing the internal pressure. Dead wrinkles can be overcome by controlling the expansion deformation degree. For aluminum alloy hollow components,springback is negligible among lowpressure hydroforming when the internal pressure increases to 6 MPa,although bending moment is the main deformation driving force.

关 键 词：铝合金中空构件 充液压形 回弹 失稳弯曲 死皱 

分 类 号：TG394[金属学及工艺—金属压力加工]