芯棒参数对超薄壁管数控绕弯成形质量的影响  

Effects of Mandrel Parameters on NC RDB Forming Quality of Ultra-Thin-Walled Tube

作　　者：蒋兰芳[1] 王亚群 林姚辰 张树有[4] 李恒[5] 张飞 冯毅雄[4] 郭训忠[6] JIANG Lanfang;WANG Yaqun;LIN Yaochen;ZHANG Shuyou;LI Heng;ZHANG Fei;FENG Yixiong;GUO Xunzhong(Zhijiang College of Zhejiang University of Technology,Shaoxing,Zhejiang 312030,China;College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang King-Mazon Machinery Co.Ltd.,Lishui,Zhejiang 321403,China;School of Mechanical Engineering,Zhejiang University,Hangzhou 310058,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China;College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]浙江工业大学之江学院,浙江绍兴312030 [2]浙江工业大学机械工程学院,杭州310014 [3]浙江金马逊机械有限公司,浙江丽水321403 [4]浙江大学机械工程学院,杭州310058 [5]西北工业大学材料科学与工程学院,西安710072 [6]南京航空航天大学材料科学与技术学院,南京211106

出　　处：《西安交通大学学报》2020年第4期144-154,共11页Journal of Xi'an Jiaotong University

基　　金：浙江省重点研发计划资助项目(2020C05008);国家自然科学基金资助项目(51675478);浙江工业大学柯桥创新研究院科技计划资助项目(2018KQ012)。

摘　　要：为提高超薄壁管材的弯曲成形质量,研究了芯球个数、芯球厚度和芯棒支撑角度等芯棒参数对壁厚变化和椭圆度的影响。设计了3种芯球厚度和7种芯球个数,组合得到21种不同的芯棒支撑角度方案,建立了超薄壁不锈钢管材数控绕弯成型有限元分析模型进行仿真计算,并进行了试验验证。结果表明:芯球个数对壁厚减薄的均匀性有一定的影响,芯球个数相同时,芯球厚度越小,最大壁厚减薄率也越小,最大壁厚减薄率随着芯棒支撑角度的增大而变大;随着芯球个数、芯球厚度或芯棒支撑角度的增加或变大,椭圆度都有减小的趋势;同时总结出超薄壁不锈钢管材的合理的芯棒支撑角度范围为θ/3~θ/2。此项研究对指导芯棒参数设计、提高超薄壁管材的成形质量具有重要意义。To improve the bending formation quality of ultra-thin-walled tube,the effects of the mandrel parameters,including number of mandrel ball,mandrel ball thickness,and mandrel support angle,on wall thickness variation and ovality are discussed.21 differently combined mandrel support angle schemes are designed by combining three different mandrel ball thicknesses with seven different mandrel ball numbers.The results show that the number of mandrel ball exerts a certain influence on the wall thinning uniformity.For same number of mandrel ball,the smaller the mandrel ball thickness,the smaller the maximum wall-thinning ratio.The maximum wall-thinning ratio becomes larger as the mandrel support angle increases.with the increase in the number of mandrel ball,mandrel ball thickness or mandrel support angle,the ovality tends to reduce.It is concluded that the reasonable mandrel support angle for ultra-thin-walled stainless steel tube is ranged fromθ/3 toθ/2.

关 键 词：超薄壁管 数控绕弯成形 芯棒参数 芯棒支撑角度 

分 类 号：TG386.3[金属学及工艺—金属压力加工]