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.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
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
关键词
薄壁管
摩擦
横截面质量
弯曲挠度
thin-walled tube
tube NC bending
friction
cross section quality
