初始间隙对双金属复合管液压成形的影响研究  

Effect of Initial Clearance on Hydroforming of Bimetallic Clad Pipe

作　　者：李兰云[1,2,3] 张阁[1] 刘静 李霄[1,2] LI Lanyun;ZHANG Ge;LIU Jing;LI Xiao(Key Laboratory of Materials Processing Engineering,School of Material Science and Engineering,Xi'an ShiyouUniversity,Xi'an 710065,China;State Key Laboratory of Material Processing and Die & Mould Technology,School of Material Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西安石油大学材料科学与工程学院材料加工工程重点实验室,陕西西安710065 [2]华中科技大学材料科学与工程学院材料成形与模具技术国家重点实验室,湖北武汉430074 [3]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《热加工工艺》2019年第5期136-140,共5页Hot Working Technology

基　　金：陕西省自然科学基金研究计划项目(2017JM5108);华中科技大学材料成形与模具技术国家重点实验室开放基金项目(P2018-001);西北工业大学凝固技术国家重点实验室开放基金项目(SKLSP201622);陕西省留学人员科技活动择优资助项目(2017026);西安石油大学青年科研创新团队项目(2015QNKYCXTD02);西安石油大学<材料科学与工程>省级优势学科项目(YS37020203);西安石油大学研究生创新与实践能力培养项目(YCS17211034)

摘　　要：在双金属复合管液压成形中,基管与衬管之间的初始间隙是影响双金属复合管成形质量的关键因素之一。本文建立了双金属复合管液压成形过程的有限元模型。基于该模型,系统深入地研究了初始间隙对成形过程的影响。结果表明:随着初始间隙增大,在基管弹性回复的作用下,衬管中产生的压缩弹性变形减小,基管内壁的回弹量稍有下降,而衬管外壁的回弹量则逐渐上升,基管和衬管之间的残余接触应力逐渐下降。In hydroforming of bimetallic clad pipe,the initial clearance between base pipe and liner pipe is one of the key factors affecting the forming quality of bimetallic clad pipe.The finite element model of the hydroforming process of bimetallic clad pipe was established.Based on the model,the effect of initial clearance on the forming process was studied systematically and deeply.The results show that with the increase of the initial clearance,the compression elastic deformation of the liner pipe decreases under the action of elastic recovery of the base pipe,the springback amount of the inner wall of the base pipe decreases slightly,the springback amount of the outer wall of the liner pipe increases gradually,and the residual contact stress between the base tube and the liner pipe decreases gradually.

关 键 词：双金属复合管 液压成形 初始间隙 弹性回复 残余接触应力 

分 类 号：TG386.41[金属学及工艺—金属压力加工]