Effect of frictions on cross section quality of thin-walled tube NC bending  

作　　者：杨合 谷瑞杰 詹梅 李恒 

机构地区：[1]College of Materials Science and Engineering, Nort hwest Polytechnic University, Xi'an 710072, China [2]College of Materials Science and Engineering, Nort hwest Polytechnic University, Xi’an 710072, China

出　　处：《中国有色金属学会会刊：英文版》2006年第4期878-886,共9页Transactions of Nonferrous Metals Society of China

基　　金：Project(50225518) supported by the National Science Foundation of China for Distinguished Young Scholars; Projects(50175092; 59975076) supported by the National Natural Science Foundation of China; Project supported by the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE, China; Project(04H53057) supported by the Aeronautical Science Foundation of China; Project(20020699002) supported by the Specialized Research Fund for the Doctoral Program of Higher Education, China; Project(Z200518) supported by the Graduate Starting Seed Fund of Northwestern Polytechnical University, China

摘　　要：The effect of frictions between dies and tube on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical analysis and experiment. The results show that the frictions between mandrel, wiper, pressure die, bending die and tube have a significant and complicate effect on the section quality of thin-walled tube NC bending. To improve the section quality, frictions between mandrel, wiper and tube should be decreased, but the frictions between the pressure die, bending die and tube increase. The effect on the section distortion is more significant from mandrel, wiper, pressure die to bending die and the effect on the wall thinning more significant from mandrel, pressure die, wiper, to bending die. The effects of frictions between all dies and tube on wall thinning are smaller than their effects on section distortion. Mandrel and wiper should be lubricated well and drawing oil is used to lubricate them in actual production. The frictions between pressure die, bending die and tube should be increased and the dry friction is used between pressure die, bending die and tube in actual production.The effect of frictions between dies and tube on the cross section quality of thin-walled tube numerical controlled（NC） bending was studied by numerical simulation method, combined with theoretical analysis and experiment. The results show that the frictions between mandrel, wiper, pressure die, bending die and tube have a significant and complicate effect on the section quality of thin-walled tube NC bending. To improve the section quality, frictions between mandrel, wiper and tube should be decreased, but the frictions between the pressure die, bending die and tube increase. The effect on the section distortion is more significant from mandrel, wiper, pressure die to bending die and the effect on the wall thinning more significant from mandrel, pressure die, wiper, to bending die. The effects of frictions between all dies and tube on wall thinning are smaller than their effects on section distortion. Mandrel and wiper should be lubricated well and drawing oil is used to lubricate them in actual production. The frictions between pressure die, bending die and tube should be increased and the dry friction is used between pressure die, bending die and tube in actual production.

关 键 词：薄壁管 摩擦 横截面质量 弯曲挠度 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]