窄波距薄壁波纹管液力成形工艺研究  

Research on hydro-mechanical forming process of thin-walled bellows with narrow wave space

作　　者：徐勇 尹阔[1] 靳鹏飞 田亚强 夏亮亮 张士宏 李博[3] XU Yong;YIN Kuo;JIN Peng-fei;TIAN Ya-qiang;XIA Liang-liang;ZHANG Shi-hong;LI Bo(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;China Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Henan Xingdi Forging Equipment Manufacturing Co.,Ltd.,Xinxiang 453600,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]河南兴迪锻压设备制造有限公司,河南新乡453600

出　　处：《塑性工程学报》2021年第8期23-29,共7页Journal of Plasticity Engineering

基　　金：中国科学院青年创新促进会专项(2019195)。

摘　　要：为满足小直径窄波距薄壁金属波纹管产品的实际需求,开发出耦合模具运动的液力成形技术,从而提高波纹管的成形质量和生产效率。应用UG软件建立有限元模型,采用Dynaform有限元模拟软件对成形过程进行模拟,研究了管坯壁厚、模瓣间距、初波胀形压力和整形压力等关键工艺参数对波纹管成形质量的影响。结果表明:减薄率和波纹段直径随着管坯壁厚的增加而下降,随着膜瓣间距、初波胀形压力和整形压力的增加而升高。当管坯壁厚为0.5 mm、模瓣间距为6 mm、初波胀形压力为25 MPa、整形压力为100 MPa时成形效果最佳。开展了相关实验验证,验证结果表明模拟结果与实验结果相符,最大相对误差在5%以内,获得的波纹管成形质量优良,满足尺寸要求。To meet the actual needs of thin-walled metal bellows with small diameter and narrow wave space,the hydro-mechanical forming process coupled with die movement was developed to improve the forming quality and production efficiency of bellows.The finite element model was established by UG software,and the forming process was simulated by Dynaform finite element simulation software.The effect of key forming parameters such as the wall thickness of tube blank,valve spacing,initial waveform bulging pressure and shaping pressure on the forming quality of bellows was studied.The results show that the thinning rate and the diameter of the corrugated section decrease with the increase of wall thickness of tube blank,and increase with the increase of valve spacing,initial bulging pressure and shaping pressure.When the wall thickness of tube blank is 0.5 mm,the valve spacing is 6 mm,the initial bulging pressure is 25 MPa,and the shaping pressure is 100 MPa,the forming effect is the best.Relevant experimental verification was carried out.The verification results show that the simulation results are consistent with the experimental results,and the maximum relative error is within 5%.The forming quality obtained bellows is good and meets the size requirements.

关 键 词：金属波纹管 窄波距 液力成形 有限元模拟 

分 类 号：TG386.43[金属学及工艺—金属压力加工]