Rectangular Section Tube Bending Technology Research

Along with the rapid development of Chinese economy, bending parts of various material specifications material in aerospace, automobile manufacturing and other high-tech fields have very important applications. With the actual test to determine the thin-walled hollow tube bending without mandrel not only time-consuming but easy to cause the waste of resources, because the material, bending with its own forming rules of pipe wall thickness, shape, size and bending die parameters have a certain relationship. This paper uses finite element simulation software DYNAFORM forming process for the material inquiry, not only shorten the experimental period but can be more accurate and intuitive showing results from the study. The contents are as follows:Coreless detour process metal rectangular section of the tube, the simulation of the bending die, compact and wrinkle gap friction coefficient between the block and the tube. The angular velocity of the bending die, bending die and wiper die and the tube between the impact pipe bending by bending deformation of the pipe, the pipe give varying wall thickness for further study of rectangular cross-section tube bending the law to obtain the relevant process parameters.Mold process parameters using simulated to study the rectangular section tube bending process of deformation law analysis radius pipe, pipe wall thickness, bend radius affect the pipe bending process and analysis of pipe wall thinning rate, variation of cross-sectional distortion. Finally, in order to optimize the pipe wall thinning rate and cross-sectional distortion, through structural improvements in the form of the mold and the mandrel are two ways to increase the mold assembly to simulate a rectangular section tube bending simulation, and the simulation results were evaluated.