Analysis Of Barrel Radial Forging Forming Simulation And Residual Stress Testing Research

The background of this thesis is the barrel radial forging technology of small caliber automatic weapon. In view of the barrel rifling forming, make analysis of the deformation. Based on the power balance method obtained the formula of the deformation force. According to theory of the axis-symmetric, establishing a simplified model of barrel radial forging process, using the large finite element software DEFORM-3D to analyze the metal flow during the process of radial forging, determine the metal material flow rate size and direction in different stage, which clearly shows the metal flow process of forming rifling.Set up the axis-symmetric model of barrel radial forging, the software DEFORM-3D is used to simulate the hammer force during radial forging, establish the finite element model corresponding different process parameters, the influence rules of deformation degree, forging rotational speed, axial feed rate, radial reduction, forging temperature, hammer speed, friction, hammer wrap angle and other parameters on the hammer force are studied when forging, provide the choice reference for actual process of the forging machine and process parameters.The process of barrel radial forging is simulated by using finite element method, predict residual stress of barrel after forging, obtain the distribution of equivalent residual stress, radial residual stress and axial residual stress on inside and outside surface.The surface of the barrel after forging is checked with high-power microscope for cracks. The axial residual stress, tangential residual stress and radial residual stress of the barrel are tested by X-ray stress meter, and the test results show that the barrel after radial forging existence residual stress exactly, compared with the simulation results of finite element method, discover coincide well with experimental results, so it is verified that the method of finite element is right.