Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion  

作　　者：Shenghan HU Cheng CHENG Ali Abd EL-ATY Shuo ZHENG Xunzhong GUO Chunmei LIU Jie TAO 

机构地区：[1]College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 21ll00,China [2]Department of Materials Science and Engineering&RIAM,Seoul National University,I-Gwanak-ro,Gwanakgu,Seoul 08826,Republic of Korea [3]Mechanical Engineering Department,Faculty of Engineering-Helwan,Helwan University,Cairo 11795,Egypt

出　　处：《Chinese Journal of Aeronautics》2023年第6期420-434,共15页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos:U1937206,52175328,52105360);the Opening Project of State Key Lab of Digital Manufacturing Equipment&Technology(No.DMETKF2021004);Jiangsu Province Key Research and Development Project(No.BE2019007-2);Fundamental Research Funds for the Central Universities(No.NS2021046);Ningbo"science and technology innovation 2025"major special project(No.2020Z078);Natural Science Foundation of Jiangsu Province(No.BK20200453).

摘　　要：In three and six-axis free-bending equipment,the deformation zone length(A)is a fixed mechanical structure parameter modified when the relevant structure is redesigned and manufactured.In this study,a six degree of freedom(6-DOF)parallel mechanism was used as the control mechanism of the bending die,and a new method of changing the deformation zone length(A)was proposed.Firstly,an idealized geometric model of free bending-based active motion was established.Then,the influence of the deformation zone length(A)on the bending moment and the bending radius of the tube was analyzed.In addition,the finite element simulation and a kinematic model of free bending-based active motion controlled by the 6-DOF parallel mechanism were established,and bending processes of the SS304 tube with different deformation zone lengths were investigated.Afterwards,the impact of the deformation zone length(A)on the bending radius,bending moment,wall thickness,and motion of the parallel mechanism were analyzed.Finally,experiments were carried out on the free-bending equipment based on the 6-DOF parallel mechanism.Experiments verified the rules in the theoretical analysis,finite element simulation,and kinematic simulation.

关 键 词：Bending radius Deformation zone length 6-DOF parallel mechanism Free bending-based active motion Small diameter tube 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]