Research Of Dieless Bending Of Pipe

Pipe as an important production material,is widely applied in many kinds of products manufacturing.Secondary plastic processing technology of pipe has always been an important research subject.In order to further improve the pipe bending technique, a large number of scientists and engineers study constantly,But due to the diversity of pipe forming parts,lead to a lot of problems need to study.This paper puts forward a new kind of pipe die bending method,Using this method to carry on pipe bending processing,it does not need special mould, the bending shape of pipe is determined by the relative motion of the pipe and fixtures.This method is a kind of highly flexible manufacturing technology,A set of tools can be processing a variety of products.As the same time, because this methord does not need fixture, so it greatly reduces the production cost, improves the production efficiency.In this paper, the main research results are as follows:Base on the analysis of traditional method of pipe bending,and the elastic-plastic bending theory of beam. carriing on the theoretical research and demonstration for the bending method.Considering the complexity and the limitations of the theoretical solution of the large deformation of elastic-plastic bending.After the theory research,adopting the method of finite element numerical simulation,proving the feasibility of this method.And analyzed he simulation results,conclusion the regular of stress and strain of pipe in the process of bending, and the change of bending section of the wall thickness, the degree of cross section distortion, bending and springback after unloading law limit.Designed and manufactured a simple machine of dieless bending of pipe,tried the bending.satisfactory results were obtained.Proved the feasibility and practicability of the proposed method.