Control on Head Displacement of H-Beam in Rolling Process

2011 ◽  
Vol 189-193 ◽  
pp. 2814-2817 ◽  
Author(s):  
Jin Hong Ma ◽  
Hui Li ◽  
Hong Bin Li ◽  
Wen Zhi Zhang
Keyword(s):  
Rolling Process ◽  
Experimental Investigations ◽  
Uniform Temperature ◽  
Elongation Ratio ◽  
Head Displacement ◽  
Universal Mill ◽  
Cooling Speed ◽  
Simulation Results ◽  
H Beam ◽  
Tongue Length

The uneven elongation between flange and web can make long tongue in the head of H-beam, which can lead to too long crop end length. In order to control the tongue length of H-beam head, different elongation ratio between flange and web is put forward to control the head displacement of H-beam. If the flange and web elongation is uniform, the loss of crop end length will be reduced. At the same time, different cooling speed of flange and web is set to keep the section uniform temperature. Experimental investigations of H-beam rolling are carried out on the universal mill in the Rolling Lab of Hebei polytechnic University. Comparisons between experimental value and simulation results prove the correctness of elongation ratio of flange and web.

The Uniform Elongation of Web and Flange of H-Beam

2009 ◽  
Vol 79-82 ◽  
pp. 1919-1922 ◽  
Author(s):  
Jin Hong Ma ◽  
Wen Zhi Zhang ◽  
Wei Chen ◽  
Shen Bai Zheng ◽  
Hong Bin Li
Keyword(s):  
Residual Stress ◽  
Uniform Elongation ◽  
Rolling Process ◽  
Reduction Ratio ◽  
Elongation Ratio ◽  
Beam Production ◽  
Simulation And Experiment ◽  
H Beam ◽  
In Virtue Of

H-beam is widely used in the construction in virtue of its excellent sectional properties. Because of its complex section, flange and web are deformed in different zones in rolling process. The traditional elongation ratio between flange and web is 1.03~1.05, which obtained from experience. Web wave, crack, or flange crack, and the large residual stress exist in the H-beam production. The problems are mainly caused by the uneven elongation of flange and web. It is necessary to keep uniform elongation of flange and web to solve these problems. The modified reduction ratio between flange and web is provided in this paper. The ratios improve the quality of H-beam by simulation and experiment.

Rolling Force Research on Cogging Rolling of H-Beam

2010 ◽  
Vol 450 ◽  
pp. 87-90
Author(s):  
Qin Qin ◽  
Di Ping Wu ◽  
Jing Jing Li ◽  
Yong Zang
Keyword(s):  
Cross Section ◽  
Rolling Force ◽  
Three Dimensional ◽  
Reduction Rate ◽  
Rolling Process ◽  
Fem Model ◽  
Mechanical Coupling ◽  
Simulation Results ◽  
H Beam ◽  
The Web

Due to the complexity of H-beam’s cross section, it is difficult to calculate the rolling force and force torque accurately using classic formulas conveniently when H-beams of new size are developed. This paper describes an investigation into the reversing process of H-beam using MARC software and compares the results with rolling data from the production line. A FEM model involving in three-dimensional, elastic-plastic and thermo-mechanical coupling has been established successfully to predict multi-pass rolling process. The analysis produces outputs such as deformation rules, rolling force and the web thickening. The influence of rolling reduction, the reduction rate between the web and flange are also discussed. The indications are that there is much difference between the measurement of rolling force and the rolling force calculated by using classic formulas. The reason is that real reduction during rolling process is much more than the scheduled one. A new revised method was suggested to calculate the rolling force. The simulation results show that this new method for calculating rolling force is feasible.

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

2014 ◽  
Vol 898 ◽  
pp. 189-192
Author(s):  
Jin Hong Ma ◽  
Bin Tao ◽  
Xiao Han Yao
Keyword(s):  
Uniform Elongation ◽  
Rolling Process ◽  
Elongation Ratio ◽  
Uniform Deformation ◽  
Actual Production ◽  
H Beam ◽  
Rolling Quality ◽  
Tension Fracture

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.

Finite Element Simulation of Large H-Beam in X-H Rolling Process

2012 ◽  
Vol 569 ◽  
pp. 251-255
Author(s):  
Pei Qi Wang ◽  
Qin He Zhang ◽  
Bao Tian Dong ◽  
Ru Po Ma
Keyword(s):  
Temperature Field ◽  
Shear Force ◽  
Rolling Process ◽  
Coupling Analysis ◽  
Mechanical Coupling ◽  
Compressive Stresses ◽  
Hot Rolling Process ◽  
Element Simulation ◽  
Simulation Results ◽  
H Beam

In order to research the hot rolling process of large H-beam, the thermal-mechanical coupling analysis and big distortion theory are used to simulate the whole X-H rolling process of HN900x300 by ABAQUS, in which the re-meshing technique is taken into simulation to increase the accuracy. Based on the simulation results, the stress and deflection of the roller as well as the metal flowing law and temperature field of workpiece are discussed emphatically. The results clearly show that the roller is subjected to alternating shear force and compressive stresses of three directions, and the metal of flange tends to flow from outside to inside. The simulation results are compared with the measuring results, which proves the correctness of simulation.

Thermal Mechanical Coupled 3D Finite Element Simulation of Large H-Beam in Hot Rolling Process

2013 ◽  
Vol 281 ◽  
pp. 484-489
Author(s):  
Pei Qi Wang ◽  
Qin He Zhang ◽  
Bao Tian Dong ◽  
Ru Po Ma
Keyword(s):  
Finite Element ◽  
Rolling Force ◽  
Element Model ◽  
Rolling Process ◽  
Forming Process ◽  
Beam Production ◽  
Element Simulation ◽  
Simulation Results ◽  
Explicit Solver ◽  
H Beam

In order to research the forming process of H-beam, based on the large H-beam production line of HN600x200, the Standard and Explicit solver of ABAQUS are synthetically used to establish finite element model for rolling process and inter-pass thermolysis process. The reciprocation multi-pass rolling process simulation procedure based on the re-meshing technology is used to simulate the whole production process form blanks to finish products, and the continuity of data is ensured. Based on the simulation results, the deformation and rolling force of the roller as well as the metal flowing law and temperature field of workpiece are discussed emphatically. The results clearly show that the displacement of roller contains the elastic deformation and the deflection, and the counterforce of left adds to the counterforce of right is about equal to the resultant force. The simulation results are compared with the measuring results, which proves the correctness of simulation.

The Stress Change Simulation Analysis for Beam Blank Cogging during H-Beam Rolling

2012 ◽  
Vol 621 ◽  
pp. 228-231
Author(s):  
Lin Chen ◽  
Ze Yuan Li ◽  
Ke Xin Bi
Keyword(s):  
Compression Ratio ◽  
Simulation Analysis ◽  
Equivalent Stress ◽  
Rolling Process ◽  
Stress Change ◽  
Whole Process ◽  
Simulation Results ◽  
The Law ◽  
H Beam ◽  
Blank Size

In order to guarantee the requirements of H-beam microstructure and property, its must have a certain compression ratio in the rolling process from blank to finished products. This paper simulated and analyzed the law of H-beam equivalent stress change for beam blank cogging with software DEFORM. Simulation results show that the compression ratio is 10.78 in the rolling process from blank to finished products; after BD cogging, blank size meet the requirements of A hole by rolling one pass into CCS rolling, the law of H-beam equivalent stress mainly focus on the waist and haunch joint in the whole process of beam blank cogging.

Study on the Flange Spread of H-Beam

2014 ◽  
Vol 898 ◽  
pp. 213-216
Author(s):  
Jin Hong Ma ◽  
Xiao Han Yao ◽  
Bin Tao
Keyword(s):  
Rolling Process ◽  
Production Data ◽  
Fe Model ◽  
Continuous Rolling ◽  
Elongation Ratio ◽  
Deformation Parameters ◽  
Flange Thickness ◽  
Hot Continuous Rolling ◽  
H Beam ◽  
Explicit Dynamic

According to the production data of a rolling H-beam factory, the FE model of hot continuous rolling process of H-beam is built. The rolling process of H-beams is simulated by explicit dynamic FEM, and the influence of deformation parameters on the spread of rolling piece is analyzed. The simulation results show that the flange width, elongation ratio between flange and web and flange thickness are the major influencing factors on the spread of rolling piece.

The Influence of Rolling Parameters on Metal Flow Law of H-Beam

2014 ◽  
Vol 898 ◽  
pp. 201-204
Author(s):  
Jin Hong Ma ◽  
Xiao Han Yao ◽  
Bin Tao
Keyword(s):  
Metal Flow ◽  
Rolling Process ◽  
Fe Model ◽  
Continuous Rolling ◽  
Elongation Ratio ◽  
Deformation Law ◽  
Hot Continuous Rolling ◽  
Flow Law ◽  
H Beam ◽  
Deform 3D

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. The exchange of metal between the flange and the web of H-beam alters to the different elongation ratio of flange and web. The other factors which influents on the metal flow , are taken into consideration, such as rolling speed and friction coefficient. By adjustment to the rolling parameters, the defect of the H-beam is reduced.

Development of Low Carbon High Strength H-Beam Steel

2010 ◽  
Vol 168-170 ◽  
pp. 969-972
Author(s):  
Jian Qing Qian ◽  
Ji Ping Chen ◽  
Bao Qiao Wu ◽  
Jie Ca Wu
Keyword(s):  
Mechanical Properties ◽  
Laboratory Experiments ◽  
Theoretical Study ◽  
High Strength ◽  
Rolling Process ◽  
Low Carbon ◽  
Study Product ◽  
H Beam ◽  
Nitrogen Alloy

The application of vanadium-nitrogen alloy to develop a certain low carbon high strength H-beam steel was determined through the combination of theoretical study, product requirements and existing practical conditions. The specific rolling process was further defined through laboratory experiments. The developed low carbon high strength H-beam steel was trial produced and its properties were also analyzed. The results showed that the newly developed low carbon high strength H-beam steel had excellent mechanical properties and good weldability.

Influence of Forming Residual Stresses on the Welding Distortions of Two Thick Plates

2009 ◽  
Vol 83-86 ◽  
pp. 125-132 ◽  
Author(s):  
Sebastien Gallée ◽  
Antoine Martin ◽  
Vincent Robin ◽  
Daniel Nelias
Keyword(s):  
Numerical Simulation ◽  
Electron Beam ◽  
Heat Source ◽  
Residual Stresses ◽  
Electron Beam Welding ◽  
Initial Conditions ◽  
Rolling Process ◽  
Vacuum Vessel ◽  
Thick Plates ◽  
Simulation Results

The manufacturing of the ITER (International Thermonuclear Experimental Reactor) vacuum vessel involves the welding of thick deformed plates. The aim of this study is to investigate the influence of forming residual stresses on the welding distortions of two thick plates. The plates are deformed using a three point rolling process. A first numerical simulation is performed to investigate the residual stresses induced by this process. The forming residual stresses are taken into account as initial conditions to perform the electron beam welding simulation of a deformed plate. This simulation first requires calibrating the heat source. Two welding simulations are then performed: the first one with residual stresses and the second one without. The comparison of the simulation results points out a low effect of the residual stresses on the electron beam welding distortions. As a result, in the next electron beam welding simulations of the vacuum vessel, no forming residual stresses will be taken into account.

Sign in / Sign up

Export Citation Format

Share Document