带筋管充液压形主要缺陷形式及控制方法  

Main defects of hydro-assisted press forming of stiffened tube and control method

作　　者：初冠南[1] 李伟[1] 王红[2] 

机构地区：[1]哈尔滨工业大学(威海)材料科学与工程学院,威海264209 [2]日照职业技术学院机电工程学院,日照276826

出　　处：《塑性工程学报》2016年第6期64-70,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51405102;51475121)

摘　　要：采用有限元模拟结合物理实验的方法,研究了不同筋板高厚比的带筋管机械压形和充液压形的主要缺陷形式,分析了各类缺陷产生的原因和影响因素,并给出了缺陷的控制方法。实验结果表明:内压显著改变了带筋管成形过程中的受力条件,在合适的内压辅助下带筋管的筋板和筒体均可顺利发生曲率增大或减小变形,在1MPa内压下,成形的平直段长度达到97mm。充液压形管内凹塌陷的缺陷可以通过控制内压消除,通过适当增加筋板厚度或减小筋板高度,使筋板高厚比低于一定值可以避免筋板起皱缺陷的产生;筋板高厚比和充液内压大小对缺陷有很大的影响。The finite element simulation and physical experiments were used to study the main defects of the mechanical pressure and the hydraulic pressure of the reinforced tube with different ratios of height to thickness. The causes and the influence factors of all kinds of defects were analyzed and the control method for the defects was given. The experimental result shows that the internal pressure significantly changes the stress condition in the process of the forming process of the stiffened tube, and the reinforcement plate and the tube body of stiffened tube under suitable internal pressure can be smoothly formed. The straight section length of the forming process is 97mm with internal pressure 1 MPa. The cavity collapse in a hydraulic pressed pipe can be eliminated by controlling the internal pressure. The wrinkle of the stiffened plate can be avoided when the ratio of height to thickness for stiffened plate is lower than a specific value by increasing the thickness of the stiffened plate or decreasing the height of the rib. The ratio of height to thickness for stiffened plate and the lateral filling pressure have a great influence on the defects.

关 键 词：带筋管 机械压形 充液压形 筋板起皱 塌陷 

分 类 号：TG394[金属学及工艺—金属压力加工]