Simulation Research on bending forming quality of special-shaped tubes with different materials
Due to the differences in mechanical properties,thermal hardening index,thickness anisotropy coefficient,and elongation among different materials of tube billets,various quality problems occur in the bending forming process of steel with different strength.In order to determine the impact of different materials and cross-sectional sizes on the quality of pipe blanks during bending at different angles,finite element models of Q235 and Q345 were established under 12 working conditions with bending of 30°～90°.The research results indicate that the influence of different materials with the same cross-sectional size on the reduction rate of mid plane height and wall thickness of the tube blank is consistent;There is a significant difference in the maximum mid plane height reduction rate and maximum wall thickness reduction rate data for different cross-sectional sizes under the same material,and it is found that the critical bending angle is 60°.When the critical bending angle is exceeded and the pipe blank cross-sectional size is small and bent at a large angle,the maximum wall thickness reduction rate data shows a rapid increasing trend,which seriously affects the forming quality of the pipe blank.
ordinary carbon structural steellow alloy high strength steelrotary-draw bendingspecial-shaped tubefinite element simulation
万方数据
维普
