CAJ | 학술논문

对薄壁Y型三通管的内管压成形进行研究.通过轴向补料,管材可以被推入模腔从而获得更高并且相对减薄率小的支管.但是Y型三通管的导向区较长,在内压作用下管材和模具之间会产生较大的摩擦力,使得材料难以流入支管.提出了采用多段式冲头用来改变导向区的内压分布并且减小导向区的摩擦力的方法.对铝合金Y型三通管进行内高压成形实验,采取两种方案,分别使用传统冲头和多段式冲头进行对比.对壁厚分布和减薄率分布进行研究,并对使用不同冲头的结果进行对比.
대박벽Y형삼통관적내관압성형진행연구.통과축향보료,관재가이피추입모강종이획득경고병차상대감박솔소적지관.단시Y형삼통관적도향구교장,재내압작용하관재화모구지간회산생교대적마찰력,사득재료난이류입지관.제출료채용다단식충두용래개변도향구적내압분포병차감소도향구적마찰력적방법.대려합금Y형삼통관진행내고압성형실험,채취량충방안,분별사용전통충두화다단식충두진행대비.대벽후분포화감박솔분포진행연구,병대사용불동충두적결과진행대비.
The hydroforming of an integral thin-walled Y-shaped tube was investigated.With axial feeding,tube material can be pushed into the die cavity to form a higher protrusion height with relatively small thinning ratio.For the Y-shaped tube,however,owing to the high-friction forces acting at internal pressure in the guiding zone between the tube and die,less metal flows into the protrusion.A multistage punch was proposed to change the internal pressure distribution in the guiding zone and to reduce the friction force between the tube and the die.Experiments of hydroforming of aluminum alloy Y-shaped tube were carried out,in which two projects with traditional punch and multistage punch were applied to comparison.The thickness distribution and thinning ratio distribution were investigated,and the results by different punches were compared.