scholarly journals NUMERICAL SIMULATION OF ECCENTRICITY CREATION IN THE PRODUCTION OF HOT ROLLED TUBES

2021 ◽  
Vol 7 (4) ◽  
pp. 125-129
Author(s):  
Roman Ďurčík ◽  
Ladislav Morovič ◽  
Michal Kán ◽  
Milan Mojžiš
Keyword(s):  
Numerical Simulation ◽  
Rolling Mill ◽  
Rolling Process ◽  
Quality Analysis ◽  
Actual State ◽  
Charge States ◽  
Geometric Quality ◽  
Hot Rolled ◽  
Deform 3D

The paper deals with the issue of eccentricity in the technological node of the piercing press, under selected conditions, which result from the possibilities of production in the conditions of ŽP a.s. These conditions were verified and adapted to the rolling process. This process consisting of individual technological nodes on the rolling mill, in which eccentricity is created on the piercing press and the following steps eliminate it in other technological nodes. For quality analysis of manufacturing tubes using numerical simulation, it is necessary to know the actual state of eccentricity creation on the rolling mill. A numerical simulation of piercing under different input conditions was used (software DEFORM-3D) and was performed for several different charge states before entering onto the piercing press. The eccentricity itself has a significant effect on the resulting geometric quality of the tubes.

Numerical Simulation and Analysis for Surface Defect Prediction in the Hot Bar Rolling Process

2011 ◽  
Vol 474-476 ◽  
pp. 325-329 ◽  
Author(s):  
Jie Jin ◽  
Gang Huang
Keyword(s):  
Numerical Simulation ◽  
Surface Defects ◽  
Simulation Analysis ◽  
Equivalent Stress ◽  
Rolling Process ◽  
Processing Parameters ◽  
Equivalent Strain ◽  
Practical Significance ◽  
Bar Rolling ◽  
Hot Rolled

Establishment of numerical model for hot rolled bar and analysis the changes from the discrete points on surface during the hot bar rolling process (includes velocity, displacement, equivalent stress, equivalent strain). And the position of surface defects can be effectively predicted form this. Compared with the actual hot rolling bar production, numerical simulation was in good agreement with it. So that the numerical simulation analysis has practical significance for optimizing processing parameters and process design to ensure product quality.

Numerical simulation of air purging conditions during steel sheet temper rolling process

2017 ◽  
Vol 08 (01) ◽  
pp. 1750007 ◽  
Author(s):  
Siyu Dai ◽  
Yonglin Kang ◽  
Guoming Zhu ◽  
Xiaofei Zheng ◽  
Yuhui Wen
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Surface Quality ◽  
Working Conditions ◽  
Steel Sheet ◽  
Rolling Process ◽  
Simplified Model ◽  
Temper Rolling ◽  
Structured Grids

The application of the lubricant in the temper rolling process of tinplate manufacturing improves the mechanical properties and surface quality of the steel sheet. The removal of the residual lubricant deserves and has rarely been studied via numerical simulation. A simplified model of a single stand temper mill was established and was discretized into cells of block-structured grids. The criterion whether the lubricant could be removed was decided via multiphase simulation of a smaller model. Three parameters, the gap between the deflector and the rolls, the length of an additional baffle and the velocity of the purging air, were considered and scores of different working conditions were performed. The shapes of the steel sheet between the temper rolls and the bridle roll were also studied to screen out the conditions that the sheet could move steadily.

Numerical Simulation of Seamless Tube’s Stretch Reducing Process

2011 ◽  
Vol 704-705 ◽  
pp. 155-159 ◽  
Author(s):  
Jun Hong Li ◽  
Hui Yu
Keyword(s):  
Numerical Simulation ◽  
Wall Thickness ◽  
Thickness Distribution ◽  
Rolling Process ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Thickness Tolerance ◽  
Hot Rolled ◽  
Product Specifications

The stretch reducing process is the last hot deformation process of the hot-rolled seamless steel tube’s production. Its role is to decrease the tube’s diameter under the large tension and expand the range of product specifications. But the stretch reducing process often results in wall thickness tolerance at the head and end of the tube. In order to solve the problem, a 3D elastic-plastic finite element analysis model was established to simulate the stretch reducing process of φ159 unit. Based on this, the tube’s wall thickness distribution was studied and the parameters of sharpen rolling process was put forward. Numerical simulation results indicate that with the parameters of sharpen rolling process, the length of wall thickness tolerance was shorten and the rate of finished products was proved.

Research on the Movement of the Guiding Roll in the Ring Rolling Process

2011 ◽  
Vol 101-102 ◽  
pp. 880-883
Author(s):  
Xue Dao Shu ◽  
Min Xiao
Keyword(s):  
Numerical Simulation ◽  
Angular Velocity ◽  
Cross Sections ◽  
Rolling Process ◽  
Scientific Basis ◽  
Ring Rolling ◽  
Rolling Equipment ◽  
Simulation Results ◽  
Ring Rolling Process

The guiding roll is an important part of the ring rolling equipment which plays an important part in stabilizing the rolling and ensuring the quality of product. This paper obtained the formula for instant diameter of ring during the rolling process and established the motion equation of guiding roll. The angular velocity, instant displacements in X and Y direction of guiding roll center were calculated by MATLAB software. The numerical simulation of ring rolling of ring with rectangular cross sections was completed under the ABAQUS/Explicit environment after importing the instant displacement of guiding roll center. The simulation results indicate that the guiding roll could be controlled accurately by the proper method. These research conclusions can provide scientific basis for ensuring the quality of product and accurately controlling the movement of guiding roll during the ring rolling.

The Modeling of Thread-Rolling Die-Plates Based on the “Design Table” Functions in CAD/CAE/CAM

2011 ◽  
Vol 130-134 ◽  
pp. 499-503
Author(s):  
Yong Jun Jiang
Keyword(s):  
Rolling Process ◽  
Screw Thread ◽  
Microsoft Excel ◽  
Plate Design ◽  
Thread Rolling ◽  
3D Software ◽  
Plate Geometry ◽  
Deform 3D ◽  
Construction System

This paper has successfully developed an integrated automatic taper-tipped die-plates construction system via linking the design table functions in Microsoft Excel underlying SolidWorks CAD software. The developed system can be used to generate 3D thread-rolling die-plate geometry in STL format for further screw thread-rolling process FEA simulations by using DEFORM 3D software. This has concluded that the quality of a taper-tipped screw depends mostly on the die-plate design at the pre-rolling portion.

Modelization of the Rolling Mill with a FE Code

2015 ◽  
Vol 651-653 ◽  
pp. 291-296 ◽  
Author(s):  
Damien Chevalier ◽  
Pierre Cezard ◽  
Laurent Langlois ◽  
Régis Bigot
Keyword(s):  
Process Parameters ◽  
Production Line ◽  
Rolling Mill ◽  
Production Costs ◽  
Internal Quality ◽  
Industrial Data ◽  
Rolled Material ◽  
Major Factors ◽  
Hot Rolled

To reduce production costs and to improve performances of hot rolled products, it is necessary to optimize the production line. The rolling mill is one of the major factors which affect the internal quality. In fact the process tends to reduce the size of defects during the strain. The production line consisting of 24 stands has been modeled with a commercial FE-code FORGE®. First, a model has been developed and adjusted according to industrial data. Then a parametric study was carried out in order to estimate the influence of the process parameters on the internal quality of the rolled material.

Stability analysis of the rolling process and regenerative chatter on 2030 tandem mills

2002 ◽  
Vol 216 (12) ◽  
pp. 1225-1235 ◽  
Author(s):  
Y Chen ◽  
S Liu ◽  
T Shi ◽  
S Yang ◽  
G Liao
Keyword(s):  
Stability Analysis ◽  
Rolling Mill ◽  
Rolling Process ◽  
Delay Effect ◽  
Regenerative Chatter ◽  
Vibration Model ◽  
Negative Damping ◽  
Time Delay Effect ◽  
Chatter Marks

Chatter in the rolling stack of high-velocity tandem mills and temper mills is a widespread problem and affects the quality of the finished product and the productivity of the rolling mill. One factor that clearly plays an important role in causing mill vibration is the inherent gap between the roll chocks and mill housings. In order to control chatter in cold rolling operations, a much deeper understanding of the basic mechanics of the problem is required. Therefore, this paper proposes a rolled piece vibration model for comprehending instability of the strip due to the variation of the friction coefficient in the roll bite. Subsequently, owing to the time delay effect of the chatter marks between the immediate stands, a regenerative chatter model is developed and stability analysis of the regenerative chatter model due to negative damping is presented. Finally, for a more detailed understanding of the regenerative chatter phenomena, a simulator is developed and industrial investigations are carried out in practice. It follows from the numerical simulations and industrial investigations that regenerative chatter is a more serious vibration phenomenon than simple chatter.

Numerical Simulation for Thick-Walled Hollow Axle during Cross Wedge Rolling

2011 ◽  
Vol 337 ◽  
pp. 270-273 ◽  
Author(s):  
Yang Jiang ◽  
Bao Yu Wang ◽  
Zheng Huan Hu ◽  
Jian Guo Lin
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Rolling Process ◽  
Cross Wedge Rolling ◽  
Finite Element Software ◽  
Temperature Distributions ◽  
Simulation Results ◽  
Deform 3D

The paper investigates a process of cross wedged rolling (CWR) for manufacturing thick-walled hollow axles. A finite element numerical model coupled deformation and heat transfer of CWR is established using commercial finite element software DEFORM-3D. The rolling process of hollow axle during CWR is simulated successfully. The stress, strain and temperature distributions of workpiece are obtained and analyzed. The simulation results show that forming thick-walled hollow axles through CWR is feasible.

scholarly journals Research of defects of hot-rolled steel having rolling nature of formation of the rolling shop no. 1 of rolling mill 850 at OJSC «BSW – Management Company of Holding «BMC»

2019 ◽  
pp. 60-68
Author(s):  
I. A. Kovaleva ◽  
Yu. A. Potapenko
Keyword(s):  
Rolling Mill ◽  
Western Europe ◽  
Great Influence ◽  
Rolled Steel ◽  
Management Company ◽  
Defects Analysis ◽  
Quality Of Products ◽  
Hot Rolled ◽  
Hot Rolled Steel

Rolling is the final stage of the metallurgical cycle and has a great influence on the quantity and quality of products, as well as on various technological and economic indicators of the plant.The OJSC « BSW – Management Company of Holding «BMC» is working on the development and supply of hot-rolled round products for the automotive industry in Western Europe.The increasing requirements for the quality of the surface of hot-rolled steel are a powerful incentive to improve the technology of its production, which is impossible without the use of modern methods of control and proper identification of detected defects.The article presents the results of the study of defects of hot-rolled products of rolling mill № 1 850, having the rolling nature of formation.Metallographic study was conducted on the basis of: visual inspection of defects, in some cases with the preparation of a template for the study of macrostructure and location of defects; analysis of images of the microstructure of the cross section of the sample in the area of defects. With the help of characteristic external and microstructural features of defects, special etching in reagents, the causes of their formation were established, and recommendations for their minimization or complete elimination were proposed.

Design of modernization of control valves for the counter-bending forces regulation in finishing mill

2017 ◽  
Vol 2 (80) ◽  
pp. 56-64
Author(s):  
E. Evin ◽  
J. Tkáčová ◽  
Z. Lengyel
Keyword(s):  
Control System ◽  
Rolling Mill ◽  
Rolled Strip ◽  
Rolling Mills ◽  
Control Valves ◽  
Integrated Electronics ◽  
Finishing Mill ◽  
Position Controller ◽  
Hot Rolled

Purpose: The aim of this paper is design of modernization of control valves of finishing mill to control the counter-bending forces on the last stands by replacement of proportional valves with regulating ones. Design/methodology/approach: New board (construction, location and arrangement of valves) was designed, model of which was constructed by SolidWorks software. Findings: The solution was oriented to optimization by replacement of proportional valves for regulating ones to control the counter-bending forces on the rolling mills. The selected types of proportional and regulating valves were compared. The main advantage of the application of regulating valves is integrated electronics with position controller for pilot valve control and position feedback disposal. Based on the parameters of the regulating valve the new respite and relief valves were designed. Research limitations/implications: Design of substitution of upper and lower blocks of control valves and modelling the motherboards using SolidWorks software was conditional by dimensions of currently used hydraulic components and dimensions of the proposed valves. Designed blocks ensure the functioning of the control system of counter bending of working rolls. In the future the perspective to control the counterbending forces can be carried out by innovation of the rolling mill by pump control using asynchronous converters and/or by changing the structure of the arrangement of rolling mill and by design of CVC control of the rolling mill. Practical implications: New board (construction, location and arrangement of valves) was designed, model of which was constructed by SolidWorks software. Designed board ensures the functioning of the control system for counter-bending of working rolls. Originality/value: The result of the proposed solutions is increasing the quality of the hot rolled strip i.e. reduction of the strip waviness and keeping the cross section of the strip.

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