Computer Simulation Of Online Cutting Technology Of Cold Roll Forming Profiles

In recent years, roll forming technology of variable cross-section is developing very fast, cold formed profiles with variable cross section has been widely applied in many industries, particularly in the automotive industry, which achieve the light weight automobiles. Online simulation study on cutting technology of cold-formed sections is of importance for the development of variable cross-section roll forming technology. At present, the development of cutting technology of the fixed section profile is mature, but the research of variable cross-section profile cutting technology is still in the initial stage.In this paper, the cutting machine of variable cross-section cold roll forming profiles is taken as the object, simulated the cutting technology of the cold formed profiles with variable cross section. According to the structural feature and cutting principle of the device, the mould parts are simplified and the3D simulation model was established. The cutting process of the profile is simulated with DEFORM-3D, one finite element analysis software. The deformation process and the change law of the stress and strain of the variable section profile are analyzed. We find that the maximum stress is concentrated near the die edge and the maximum strain is in the double layer plate region of the profile.Based on orthogonal test method, an experiment is designed of three factors which influence the shear force of the cutting process, the cut angle, the cut speed and the die gap. Simulation is taken according to the design scheme, and the simulation data is analyzed. The weight of the three factors is obtained by the range analysis and the significance of the three factors is tested by the analysis of variance. Simulation analysis of three factors is carried out and the influence of the factors on the shear force of the profile cutting process is obtained.By means of DEFORM-3D, from two aspects of the collapse deformation zone and the right angle, the influence of the cutting angle, the cutting speed and the die gap on the cutting quality of the profile are analyzed using the method of orthogonal experiment. Finally, we conclude that the effect of the cutting angle and the die clearance on the cut off mass is remarkable, while the cutting speed has little effect on the cut off quality.