H Beam Universal Rolling Flange Distortion Simulation

Hot rolling H-beam possesses preferable mechanical properties of bending resistance, torsion and resist compression, which could lighten structural metallic. These superiorities have been cognized and accepted by more and more professionals. The foreground of hot rolling H-beam's application will be extensive in steel structure field.The paper simulated the deformed rule of H-beam flange with FEM simulation software. In order to study the forming rule of flange, we simulated one gate of universal rolling of the 250mm×250mm H-beam. According to the principle of metal forming and theory of FEM, we use the large-scale nonlinear FEM simulation software-MSC.Marc to establish and use the three-dimensional elastic-plastic model, with the material thermodynamic parameter which was obtained by testing in the laboratory and the practical rolling regulations of factory. The main results are as follows:Logical analytic model was established against the feature of complicated distortion in hot rolling H-beam. The process of hot rolling was simulated then.During the simulation of the H-beam rolling process, the software-MSC.Marc, aiming at the material nonlinear, the geometrical nonlinear and the contact nonlinear between roller with rolled piece, has dealt with the load-on and boundary condition of rolling. With the characteristic of rolling, it has set up the practical three-dimensional finite element model with 3D solid elements with 8 nodes.H-beam was shaped with rolling in roll gap which was formed by two horizontal and vertical rollers. The work piece was nipped by horizontal roller through friction. The vertical roller was moved by the friction which was generated indirectly by horizontal roller. We defined a rigid body at the end of the rolled piece which moved in the rolling direction prompted by rigid body. The rolled piece kept the same line speed with mill roll and was nipped the mill roll compel. We defined the friction at the same time. So we can achieve the H-beam which was nipped in real state. Meantime, we simulated the last gate of universal rolling of H-beam with MSC.Marc, and validated the dependability of MSC.Marc in the universal rolling of H-beam, with testing date in practical manufacturing of H-beam. We simulated the rolled deforming of H-beam in the universal mill, found out the deformed rules of the H-beam flange when the flange reduction, the web reduction, friction coefficient, rolling temperature, the radius of flange with web, the bevel of flange and the diameter of horizontal and vertical rollers changed, and analyzed the influence of the factor on processing parameter of rolling.According to the analysis of the influenced factors of the H-beam flange spread and practical manufacturing status, chosen the best parameter, established the best model, simulated the optimizing model, and contrasted the change of flange spread of the optimizing model with original model and mechanical property of flange. That can supply the theory for developing the 280mm×280mm H-beam later.