Bin Tao

The Simulation of Rolling Process of Wire with Y-Type Roller

Y-Type rolling mill with three roller is a new kind of wire mill.The three-dimensional models of rolling are established by Pro/E. Based on the finite element analysis software ANSYS/LS-DYNA, the rolling process of wire by Y-type rollers is simulated. The rolling piece movement is analysed. Stress and strain of Y-type roller are also analysed.

Cooling Parameters Optimization of H-Beam after Rolling with MOGA

Multi-objective genetic algorithms (MOGA) is broadly used in the engineering problem. . Combined the multi-objective genetic algorithms (MOGA) with finite element method (FEM), a new kind engineering optimization method is established. This optimal method takes fully advantage of the unique feature of genetic algorithms that the optimal solution is achieved by a rapid global search and takes advantage of the unique features of FEM that the computation is accuracy. This method can solve multi-objective problems with more complex constraints in the engineering. The procedure is developed by VC++. Temperature difference of H-beam section has great influence on the residual stress of H-beam. In order to reduce the temperature difference of H-beam and make the microstructure of H-beam uniform, the cooling parameters of H-beam after rolling are optimized. The new kind of optimization method MOGA combined with FEM is used to handle this problem. The better optimization result is obtained.

Optimal Design of Hot Rolling Strip Mill Housing with Improved GA

Mill housing vibration influents the strip thickness fluctuation. The longitudinal deformation of rolling mill will directly affect plate thickness difference. The longitudinal deformation should be reduced , improving the mill stiffness. Hot rolling mill is seen as is as subject investigated . The improved GA is used to optimize the mill housing parameters. The optimal result is analyzed. The housing stiffness improves. Low order natural frequency improves after optimization, avoiding resonance and improving the housing dynamic stability.

H-Beam Miscrostructure with Residual Stress

Different i nternal microstructure of H –Beam has great influence on the mechanical properties. In order to improve the production technology and improve the mechanical properties of products, H-beam with a residual stress products and without residual stress products are selected and observed by metallographic experiment. The internal microstructure of productions with residual stress and without residual stress are analyzed . The residual stress influence on internal microstructure of H-beam is analyzed.

Study on the Residual Stress in the Finishing Rolling Process of Large-Sized H-Beam

Based on the software of Deform-3D , the finish rolling process of H-beam has been simulated. According to the simulation from result , in the finishing process ,the residual stress of large sized H-Beam is mainly caused by uneven deformation. The big deformation exists in web. The flange deformation is only generated in the rolling surface. This uneven deformation leads to big residual stress in rolling piece.

Study on Metal Flow in the Finish Rolling Process of Large-Sized H-Beam

According to the production data of a rolling H-beam factory, the FE model of hot continuous rolling process of H-beam is built. With the FEM software of DEFORM-3D, the continuous rolling of H-beam was simulated. On base of simulation result, the metal flow and deformation law are discussed. Because of the flange and web is deformed in the different deformation zone, the metal flow law of flange and web is complex, especially the metal of the conjunction of flange and web. In this paper, the metal flow of large-sized H-beam in finishing rolling process is analyzed.

Multi-Objective Optimal Design Roller of Y-Type Mill Using Ga Combined with FEM

Y-Type rolling mill with three roller is a new kind of wire mill. Because of its unique advantage, It is very important to optimize structure. Roller is important part of the rolling mill, whose size effects the strength, stiffness, as well as the rolling piece quality and service life of the rolling mill. Therefore, It is important to optimize the roller structure dimension of Y-type mill.A new structure optimizing method is set up combined the modified genetic algorithms with finite element method.This method can solve multi-objective problems with more complex constraints in the engineering. Compared with the zero order method and first order method companied with ANSYS, the result of this optimizing method is better. This method can solve multi-objective problems with more complex constraints in the engineering, providing a new and effective means for the engineering problems.

The Uniform Elongation Experiment of Web and Flange of H-Beam

Web and flange of H-beam are deformed indifferent zone in the rolling process, so non-uniform deformation is easily generated. In order to ensure the uniform elongation of flange and web, usually , the elongation ratio of flange is 3~5% more than that of web. Web wave or crack often appears. Flange wave, crack even tension fracture often appears. Experiment are designed that the elongation ratio of flange and web are changed to ensure the uniform elongation of flange and web. Thus, the rolling quality of H-beam is improved. The recommended rolling rule is provided, which can provide the accordance for actual production.

The Simulation of Rolling Process of Bar

The three-dimensional models of rolling are established with Pro/E. Based on the finite element analysis software ANSYS/LS-DYNA, the procedure of bar tandem rolling is simulated. The nephograms of stress and strain of bar deformed area and the curve of roll force during rolling are obtained. Compared the result with the other result which comes from optimization, the precision of calculation will be verified.

FEM Research on the Residual Stress of Corrugated Waist Rail in Hot Rolling

The rolling process of corrugated waist rail is simulated by explicit dynamic FEM module ANSYS/LS-DYNA. The distribution of residual stress of the rolled piece after rolling is analyzed, The influence of rolling velocity, the reduction ratio, and rolling temperature on the residual stress are analyzed. According to the result of simulation, it is helpful to the actual production.