Research On Tube Bending Technology

Tube bending is the important part of tube plastic processing. The bending components, which made of tube, regardless of planar or spatial, are widely applied in metal structure and transfer piping for gas and liquid. Therefore research on tube bending is one of the most important fields which obtain most attention and develop rapidly. In recent years, along with deep research and development, small radius-tube bending becomes one of the hot spots on tube bend processing research. The application of the small radius bending parts is very widespread, and the small radius bend parts have been the crucial elements especially in high-tech domain such as the aviation, astronautics and so on.The primary content of the paper is as follow:①The common tube bending method and tube bending technology with small bending radius are introduced briefly and the research results of some experts are presented.②The stress state of bending forming is analyzed and the deformation degree of the bending forming is discussed, and the models and resolution of failure in bending forming are presented then.③The principle of the tube shear bending is analyzed in detail, and three-dimensional dynamic model and the finite element model are established.④By finite element analysis software DEFORM-3D, the forming process of tube shear bending is simulated numerically. Its forming process is analyzed, and its forming mechanism is expounded, and the law of forming load——stroke is opened out. Then, the influence rule are generalized about material parameter, the relative bending radius, the relative wall thickness to forming.It can be proved that the research results in this paper are practically available for accelerating the application and development of tube bending and especially tube bending with small bending radius, and present a new method for the research of tube bending.