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Journal articles on the topic 'Rolling mill rolls'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Peng, Rongrong, Xingzhong Zhang, and Peiming Shi. "Coupled Vibration Behavior of Hot Rolling Mill Rolls under Multinonlinear Effects." Shock and Vibration 2020 (June 10, 2020): 1–14. http://dx.doi.org/10.1155/2020/6104028.

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A coupled vibration model of hot rolling mill rolls under multiple nonlinear effects is established by considering the nonlinear spring force produced by the hydraulic cylinder, the nonlinear friction between the work rolls, the dynamic variation of rolling force, and the effect of external excitation as well as according to the structural constraints of a four-high hot rolling mill in the vertical and horizontal directions. The amplitude-frequency response equation of rolling mill rolls is determined by using a multiple-scale approximation method. Furthermore, use of actual data for simulatio

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2

Liu, Peng, Hong Bo Li, and Zhi Qian Shen. "Technical Characteristics and Application for a New Type of 8-Roll Cold Rolling Mill." Advanced Materials Research 572 (October 2012): 55–60. http://dx.doi.org/10.4028/www.scientific.net/amr.572.55.

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This paper focuses on a new type of 8-roll cold rolling mill with the back-up bearing roll. Compared to the traditional 6-roll cold rolling mill, a thick-walled bearing roll is used to multi-support the intermediate roll. By the rack, the fan-shaped gears, the eccentric core shaft and the servo-cylinder, the work roll can be pushed down by this screw down device on the top of the mill; By contrast with the 4(6)-roll mill, this type of mill has some characteristics, such as: the small size of rolls, lighter weight, the fast response for the screw down. The bearing roll is fixed by the supportin

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3

Brusa, E., L. Lemma, and D. Benasciutti. "Vibration analysis of a Sendzimir cold rolling mill and bearing fault detection." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 8 (2009): 1645–54. http://dx.doi.org/10.1243/09544062jmes1540.

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The presence of several rolls in cluster cold rolling mills makes on-line vibration monitoring and failure analysis difficult. The dynamic behaviour of rolls strongly depends on the rolling pressure in the roll bite. Strip vibration applies a dynamic component on the rolling force acting on the work roll and may excite the resonance of the mill stand. This problem motivates predicting the cluster mill dynamics by using a numerical model. It may help in planning the maintenance operation of rolls and bearings and in reducing the service costs. A complete dynamic analysis of the cluster mill lay

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4

Rubtsov, V. Yu, O. I. Shevchenko, and M. V. Mironova. "IMPROVING DYNAMIC REGIME OF ROLLING FOR INCREASING DURABILITY OF BALL-ROLLING MILL ROLLS." Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 61, no. 12 (2019): 927–32. http://dx.doi.org/10.17073/0368-0797-2018-12-927-932.

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One of the important reasons for the downtime of ball rolling mills is replacement of rolls due to their wear and tear. The degree and zones of critical wear of ball rolling rolls are investigated in the article, where the greatest wear is observed over the flanges in zone of billet capture. Conditions necessary to capture the blank and to perform rolling process are analytically determined. Variable frequency method of roll rotations is proposed as a progressive technology for blank supply. The results of tests for its variations in accordance with linear and quadratic law are presented. Know

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5

Kuroda, K., T. Kuboki, Y. Imamura, and C. Hayashi. "Design evaluation of multiroll mills for small-diameter wire rolling." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 1 (2001): 77–86. http://dx.doi.org/10.1243/0954406011520535.

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A comprehensive study on the evaluation of mill designs was carried out for three types of multiroll mill for wire rolling by using both prototype mills and numerical experiments. The laboratory experiments were carried out in order to examine both the deformation and loading characteristics of two-, three- and four-roll mills using a set of rolls of the same diameter. As a result, the data allow a direct comparison of the rolling characteristics among the three types of mill, which is not found in previous work. The analytical results showed a good matching with the experimental results, and

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6

Budnikov, A. S., B. A. Romantsev, and E. A. Kharitonov. "Determination of rolls diameter for screw-rolling mills." Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 61, no. 9 (2018): 683–88. http://dx.doi.org/10.17073/0368-0797-2019-9-683-688.

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The problem of determining the maximum diameter of working rolls is typical for screw rolling mills that have more than two working rolls. Precise determination of the working roll diameter is especially important for three-roll mills, which are widely used in such industries as rolling and calibration, and radial-shear rolling mills operating at large feeding and rolling angles. Typically, the diameter of working rolls is determined in a constructive way or using 3D modeling. These methods are quite complex, require special skills, and do not allow investigation of the influence of main tunin

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7

Peng, Rongrong, Xingzhong Zhang, and Peiming Shi. "Vibration Characteristics of Hot Rolling Mill Rolls Based on Elastoplastic Hysteretic Deformation." Metals 11, no. 6 (2021): 869. http://dx.doi.org/10.3390/met11060869.

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Based on the analysis of the influence of roll vibration on the elastoplastic deformation state of a workpiece in a rolling process, a dynamic rolling force model with the hysteresis effect is established. Taking the rolling parameters of a 1780 mm hot rolling mill as an example, we analyzed the hysteresis between the dynamic rolling force and the roll vibration displacement by varying the rolling speed, roll radius, entry thickness, front tension, back tension, and strip width. Under the effect of the dynamic rolling force and considering the nonlinear effect between the backup and work rolls

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8

Romantsev, B. A., E. A. Kharitonov, A. S. Budnikov, Van Chong Le, and Ba Khyui Chan. "SCREW ROLLING OF PIPES IN A FOUR-HIGH ROLLING MILL." Izvestiya. Ferrous Metallurgy 62, no. 9 (2019): 686–90. http://dx.doi.org/10.17073/0368-0797-2019-9-686-690.

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A model of four-high screw rolling mill was developed and manufactured with the help of additive technologies. The work rolls are installed: the main ones – by cup-shaped scheme and auxiliary – by mushroom scheme with an angle of rolling of ±7 degrees, with an unregulated feed angle of 15 degrees. The main and auxiliary rolls have a barrel length of 70 mm. Diameter of the main rolls in pinching is 50 mm, of auxiliary rolls – 36 mm. At the exit in cross section of the tube outlet from the rolls, their diameters are almost the same and are 72 mm. Each of the four rolls is driven by an individual

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9

Chen, Ze Jun, Guang Jie Huang, Jian Jun Min, and Boa Hua Qian. "The Development of Short Stress Path Experimental Asymmetric Multifunctional Rolling Mill." Advanced Materials Research 145 (October 2010): 171–76. http://dx.doi.org/10.4028/www.scientific.net/amr.145.171.

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This paper describes the development and design of a novel short stress path rolling mill which is used for teaching and research. The rolling mill can implement the asymmetric rolling by the way of the adjustment of upper roll speed, and also working as conventional rolling when the roll speeds of two rolls are equal. The rolling mill can produce not only the plate and sheet, but also profiles by the roll of different grooves. The rolling mill is appropriate for the rolling of the steels and nonferrous metals. In this paper, the design ideas and main parameters of principal components are pre

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10

Mauer, Paul, Bernhardt Weyh, and Paul Josef Mauk. "Hybrid Calculations of Bending Deformations for 20 Roll Cold Rolling Mill." Key Engineering Materials 716 (October 2016): 856–63. http://dx.doi.org/10.4028/www.scientific.net/kem.716.856.

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In multi-high mills, the slim fixed floating work rolls are supported by primary and secondary intermediate rolls and several supporting rolls mounted pairs-wise on supporting shafts. Over the eccentric adjustment of saddle assemblies and hydraulic adjustment device the roll gap adjusts the specific elastic bending deformation of the support system. Based on a hybrid calculation model the influence and limits of an active adjustment device for 20 roll mill will be presented. Thereby the bending deformations as well as the contact deformations of the complete system including the forming proces

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11

Yin, Zi Wu. "Three-Roll Planetary Rolling Mill Motion Analysis and Test Research." Advanced Materials Research 712-715 (June 2013): 1724–28. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1724.

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Against defects of three-roll fixed axis rolling mill caused by rolled piece rotating in process of rolling, presented three-roll planetary rolling scheme, designed the planetary transmission system structure, expounded planetary mill rolling process, analyzed movement relationship between planet carrier, roll and rolled piece according to planetary gear train transmission principle. The rolls do planetary motion and spinning motion both, the former acts on the rolled piece to make it do clockwise rotation movement, the latter acts on the rolled piece to make it do anti-clockwise rotation. The

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12

Li, H. C., Zheng Yi Jiang, A. Kiet Tieu, Wei Hua Sun, Hei Jie Li, and Dong Bin Wei. "Surface Roughness and Wear of Work Roll Containing Ti in Cold Strip Rolling." Advanced Materials Research 32 (February 2008): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.32.157.

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The consumption of work rolls in cold strip mills is significant. One of the key issues for work rolls is the surface roughness which affects the rolling stability and surface finish of the strip. The produced strip has lower surface finish if the roll surface roughness is large. However, if the roll surface roughness is small, it is not helpful for establishing the rolling process, which will reduce the productivity. In this case, a laser treatment is employed to increase the value of roll surface roughness. In order to reduce the times of roll grinding, the cold strip mill and roll manufactu

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13

Bobarikin, Yu L., and Ya I. Radkin. "Research on the effect of the grooving of mill rolls of the reeling tube mill on the wear of the elongating mandrel." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (January 14, 2019): 65–69. http://dx.doi.org/10.21122/1683-6065-2018-4-65-69.

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By means of numerical simulation the influence of the geometry of calibers of mill rolls on the wear of the elongating mandrel is determined. The type of the grooving of mill rolls of a continuous three roll reeling mill, which reduces the wear of the elongating mandrel during the rolling, is determined.

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14

Borisov, I. A., and S. S. L’vova. "Choice of steel for rolling mill rolls." Metal Science and Heat Treatment 51, no. 5-6 (2009): 272–77. http://dx.doi.org/10.1007/s11041-009-9145-5.

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15

Gorbatyuk, S. M., and L. V. Sedykh. "Improving the durability of rolling-mill rolls." Metallurgist 54, no. 5-6 (2010): 299–301. http://dx.doi.org/10.1007/s11015-010-9297-y.

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16

Ma, Xu, Jing Yun Ma, Zhi Long Feng, et al. "Finite Element Simulation of Biting Process of Cold Rolling Strip for 6-High Mill." Materials Science Forum 704-705 (December 2011): 203–9. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.203.

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In this work, On the basis of software ANSYS/LS-DYNA, the strip cold rolling simulation model was established. The process from biting to rolling steady were simulated and investigated for 6-high UCM (6-high middle rolls shift type HC-mill with middle roll bender) cold mill, including the stress, stain state, and velocity field of the workpiece and rolls. The result states that the stability of Biting Process of 6-high cold mill is preferable and the impact of biting process on the roll is acceptable. The simulation regularity corresponds well with the measurements.

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17

Zhang, Ying, Li Liu, Pei Ming Shi, and Bin Liu. "Vertical Vibration Characteristics Analysis of Stand Rolls System in Six-Roll Cold Tandem Mill." Applied Mechanics and Materials 470 (December 2013): 572–76. http://dx.doi.org/10.4028/www.scientific.net/amm.470.572.

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A dynamic model of seven degree of freedom for the vertical vibration of stand rolls system in a cold tandem mill is developed by Kinematics Theory. According to the actual parameters of a factory six-roll cold rolling mill, the influence of natural frequency and modes for rolling process is analyzed. It finds that the third-order and the six-order natural frequency play a role key in vertical vibration system. Combined with energy distribution of each part and flexibility of the modes analysis for vertical vibration system, it can avoid resonance of rolling process and optimize the parameters

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18

Hou, Dongxiao, Rongrong Peng, and Haoran Liu. "Analysis of Vertical-Horizontal Coupling Vibration Characteristics of Rolling Mill Rolls Based on Strip Dynamic Deformation Process." Shock and Vibration 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/543793.

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Nonlinear dynamic rolling forces in the vertical and horizontal directions are, respectively, established, considering the impact of vertical and horizontal directions vibration of rolls. Then a vertical-horizontal coupling nonlinear vibration dynamic model of rolling mill rolls is proposed, based on the interactions between this dynamic rolling force and mill structure. The amplitude-frequency equations of the main resonance and inner resonance are carried out by using multiple-scale method. The characteristics of amplitude frequency under nonlinear stiffness, damping, and amplitude of the di

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19

Zheng, Yong Jiang, Guang Xian Shen, Yi Geng Li, Ming Li, and Hong Min Liu. "Spatial Vibration Characteristics of Four-High Rolling Mills." Advanced Materials Research 694-697 (May 2013): 481–84. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.481.

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The contemporary four-high mills are unstable and four-high rolling mill vibrations take place in six DOF leading to spatial behaviors involving vertical, horizontal, axial, reverse, cross and swinging vibration modes resulting in complex relative motions between the rolls. In this paper, a spatial vibration characteristic analysis of two four-high rolling mills with different stability will be presented based on the transfer matrix method (TMM) and Finite Element Method (FEM). The natural frequency and mode shape of four-high rolling mill are obtained. Vibration experimental results will be p

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20

Li, Xu, Dian Hua Zhang, Peng Fei Wang, and Wen Xue Zhang. "Analysis of Contact Pressure between Rolls under Non-Symmetrical Roll Bending of UCM Cold Rolling Mill." Advanced Materials Research 145 (October 2010): 80–86. http://dx.doi.org/10.4028/www.scientific.net/amr.145.80.

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. For UCM cold rolling mill, the intermediate roll shifting can enhance the ability of mill for better flatness control, but it will increase the non-uniform distribution of pressure between rolls, as result of a reduced roll life. In order to improve the contact state among rolls in rolling processes and to slow down the roll wear, the distribution of pressure between rolls under different forms of roll bending control has been calculated and analyzed by the influence function method in this paper. For the purpose of obtaining comprehensive information, not only the distributions of pressure

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21

Rubtsov, V. Yu, and O. I. Shevchenko. "Calibration of ball-rolling rollers with continuously variable pitch." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information, no. 8 (September 1, 2018): 58–63. http://dx.doi.org/10.32339/0135-5910-2018-8-58-63.

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Presented is the state of ball rolling production, review of existing techniques for roll pass design ball-rolling today development. Possibilities of roll pass design with regard to the existing metal cutting equipment and variation of pitch parameters. The priority is set for the use of rolling rolls with a continuously varying pitch, in comparison with rolls with discretely varying pitch. Possibility of using 5-axis milling equipment for obtaining a given profile, with several variable values, is shown. Model is developed for calculating the roll pass design for rolls with a continuously va

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22

Sun, Da Le, Jian Guo Zhao, and Liang Yu Chen. "Finite Element Analysis of Temperature and Crown of Rolls in Hot Strip Rolling." Applied Mechanics and Materials 16-19 (October 2009): 575–79. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.575.

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In this paper a three-dimensional numerical computation on temperature and crown of rolls in hot strip rolling was evaluated based on finite element method and parallel computation technology with multiple CPUs. A comparison between calculated results and actual data collected from rolling mills was presented, which indicated the high accuracy of the model. The calculated results indicated that a significant impact in thin layer of work roll surface was brought by thermal load, while much weaker in the core. Furthermore, the temperature field and thermal crown of hot mill work rolls would reac

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23

Kővári, Attila. "Observer Based Leakage Detection of Hydraulic Cylinder Applied in Rolling Mills Electro-Hydraulic Gap Adjustment System." Materials Science Forum 729 (November 2012): 424–29. http://dx.doi.org/10.4028/www.scientific.net/msf.729.424.

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Hydraulic system is commonly used in the modern strip rolling mills to adjust the gap between the work rolls. Automatic gauge control based on the hydraulic systems is commonly used in modern strip rolling mills to adjust the gap between work rolls. The dynamic control of rolling gap and force is achieved by using electro-hydraulic servo actuators so-called hydraulic capsules which can adjust the rolling gap dynamically for high rolling force. The basic aim of the paper is to define an observer which could forecast the required maintenance of hydraulic cylinder using parameter estimation of th

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24

Jin, Xin, Chang-sheng Li, Yu Wang, Xiao-gang Li, Tian Gu, and Yong-guang Xiang. "Multi-Objective Optimization of Intermediate Roll Profile for a 6-High Cold Rolling Mill." Metals 10, no. 2 (2020): 287. http://dx.doi.org/10.3390/met10020287.

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The multi-objective optimization of the SmartCrown intermediate roll profile for a cold rolling mill was proposed in this paper in order to improve the strip flatness quality. A coupling model of roll profile and strip flatness was established, and the roll gap profile, roll gap crown adjustment range, rolls contact pressure, and strip flatness under different intermediate roll profile parameters were calculated based on the coupling model. The results showed that the roll gap crown adjustment range and rolls contact pressure difference increased with increasing roll profile parameters. The ro

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25

Aljabri, Abdulrahman, Zhengyi Jiang, and Dongbin Wei. "Analysis of thin strip profile by work roll crossing and shifting in asymmetrical cold rolling." International Journal of Modern Physics B 29, no. 10n11 (2015): 1540032. http://dx.doi.org/10.1142/s0217979215400329.

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In order to analyze the effects of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile, extensive tests were carried out on a 4-high rolling mill equipped with a work roll crossing and shifting system. The results show that the strip profile is nearly flat under asymmetrical rolling. The rolling force was also analyzed in detail by changing the crossing angle and axial shifting value of work rolls.

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26

Shi, Shu Zheng, Shao Lei Wang, Ming Xing Song, and Zhen Zhen Huo. "Modeling and Simulation Analysis of Five Times Frequency Flutter of Rolling Mill." Applied Mechanics and Materials 741 (March 2015): 411–15. http://dx.doi.org/10.4028/www.scientific.net/amm.741.411.

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Based on nonlinear damping and stiffness consideration between not only work rolls but also back-up roll and body frame, five times frequency flutter model of rolling mill was built according to actual structure of rolling mill, which followed by simulation analysis. Some theoretical guidance can be provided for practical engineering application.

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27

Bai, Jin Lan, and Hong Zhi Pan. "Study on Flatness Control Strategy of a Single-Stand Reversing Cold Rolling Mill." Advanced Materials Research 1004-1005 (August 2014): 1193–97. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.1193.

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In this paper, an integrated rolls system deformation calculation model is established based on the influence function method combining with pass schedule calculation, rolls wear and roll thermal deformation calculation, and the corresponding calculation procedure has been developed. Then the influence of work roll bending, work roll shifting and intermediate roll bending on transverse distribution of strip thickness, strip crown, quadratic flatness, and quartic flatness are analyzed with the procedure. According to the analysis result, flatness control strategy of the single-stand reversing c

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28

Lu, Xing, Jie Sun, Guangtao Li, Zhenhua Wang, and Dianhua Zhang. "Stability Analysis of a Nonlinear Coupled Vibration Model in a Tandem Cold Rolling Mill." Shock and Vibration 2019 (February 17, 2019): 1–14. http://dx.doi.org/10.1155/2019/4358631.

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Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system is simplified to a single mass system. However, the torsional chatter is also a typical type of mill chatter, and the presence of intermediate roll and backup roll will affect the overall vibration of the mill structure system. In this paper, a newly cold rolling mill vibration model coupled with the dynamic rolling proces

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29

Artiukh, Viktor, Vladlen Mazur, Sergey Kargin, and Nikolay Bushuev. "Reasonability to use device for making horizontal wedge thrust of rolling stand." MATEC Web of Conferences 170 (2018): 03011. http://dx.doi.org/10.1051/matecconf/201817003011.

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Necessity and reasonability to use gapless connection between contact surfaces of lining straps of work rolls chocks and facing strips of housings (inner lining straps of back-up rolls chocks) to reduce dynamic horizontal forces during rolling and increase durability of equipment are considered. Technical solution is described on base of roughing reversing rolling stand of thick sheet rolling mill 3000 of PJSC ‘ILYICH iron and steel works’ (Mariupol city, Ukraine) which can be used on most heavy loaded sheet and tube rolling mills.

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30

Hsu, Han-Kai, and Jong-Ning Aoh. "Effect of Clearances in Mill Stands on Strip End Motion During Finishing Rolling." Metals 9, no. 7 (2019): 727. http://dx.doi.org/10.3390/met9070727.

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The process stability of finishing mill is significantly influenced by the clearance between the chocks and housing in mill stands. The on-site data of a finishing mill had shown that the clearances in the finishing mill stands were clearly associated with the incidence of strip end flip. The aim of this work was to establish a numerical model to analyze the effect of the clearances on the deviation of the centerline of the strip and on the incidence of strip end flip. By adopting conditions from a particular strip, the numerical model not only predicted the strip end shape, but also visualize

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31

Kiss, Imre. "Laboratory Researches upon the thermal fatigue of the organs of machines in movement of rotation, in variable temperature mediums." Analecta Technica Szegedinensia 8, no. 1 (2014): 59–65. http://dx.doi.org/10.14232/analecta.2014.1.59-65.

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The researches of durability in the exploitation of cast-iron rolls define experimentally an important chapter from the thermal fatigue of the organs of machines in the movement of rotation, in variable temperature mediums. The researches on the durability in exploitation of hot rolling mill rolls represent an important scientific and economical issue. This paper presents original experimental equipment by the help of which the durability of hot rolling mills can be studied. This experimental equipment permits the evaluation of exploitation durability for hot rolls by studying the thermal fati

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32

Xu, Bao Yu, Yi Lun Liu, Xu Dong Wang, and Yu Qing Wang. "Stochastic Stability of Hot Strip Rolling Mill Rolls." Advanced Materials Research 216 (March 2011): 698–702. http://dx.doi.org/10.4028/www.scientific.net/amr.216.698.

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A two dimensional stochastic nonlinear dynamical model of rolls is presented considering the stochastic factor of the rolling force. The Hamilton function is also described as one dimension diffusion process by using stochastic average method, the singular boundary theory was taken for analyzing the global stochastic stability of the system, and the system’s stochastic stability is researched by solving the Fokker-Planck-Kolmogorov (FPK) equation. The results show that the generalized energy H in the range of 0.02 to 0.4, the system’s response has the minimum transition probability density, an

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33

Belzunce, F. J., A. Ziadi, and C. Rodriguez. "Structural integrity of hot strip mill rolling rolls." Engineering Failure Analysis 11, no. 5 (2004): 789–97. http://dx.doi.org/10.1016/j.engfailanal.2003.10.004.

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34

Shmyrev, I. P., L. I. Tregubova, S. P. Shivtsov, and R. N. Goryanaya. "Heat treatment of rolling mill rolls KhPT90-120." Metal Science and Heat Treatment 28, no. 2 (1986): 141–43. http://dx.doi.org/10.1007/bf00717537.

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35

Salem, Shabur. "Alloyed steel intended for hot rolling mill rolls." Metal Science and Heat Treatment 35, no. 11 (1993): 657–59. http://dx.doi.org/10.1007/bf00712290.

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36

Zazulyak, V. A., A. M. Legun, S. E. Kovchik, and A. I. Darchuk. "Crack resistance of large rolling-mill backup rolls." Soviet Materials Science 20, no. 5 (1985): 497–98. http://dx.doi.org/10.1007/bf00723151.

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37

Spuzic, S., K. N. Strafford, C. Subramanian, and G. Savage. "Wear of hot rolling mill rolls: an overview." Wear 176, no. 2 (1994): 261–71. http://dx.doi.org/10.1016/0043-1648(94)90155-4.

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38

Sun, Jian Liang, Yan Peng, Hong Min Liu, and Gang Liu. "Rolling Theory Analysis and Forces Calculation of Heavy Cylinder Rolling Mill with Two Drive Rolls." Advanced Materials Research 572 (October 2012): 13–18. http://dx.doi.org/10.4028/www.scientific.net/amr.572.13.

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Took the heavy cylinder rolling mill as subject investigated, which is used to produce the nuclear power cylinder, the large hydrogenation reactor cylinder and the coal liquefaction reactor cylinder. And the cylinder rolling mill has two drive rolls which is different from conventional ring rolling mill. The rolling theory of heavy cylinder rolling mill was researched deeply based on mechanism method, including the biting condition, the plastic penetration condition, the feed condition and the feed velocity condition; the rolling force parameters of heavy cylinder rolling mill with two drive r

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39

Mottahedi, Ali Akbar. "Investigation of Phase Transformation of Forged Steel Cold Rolls due to Heat Affecting and Prevent its Failure." Defect and Diffusion Forum 289-292 (April 2009): 219–24. http://dx.doi.org/10.4028/www.scientific.net/ddf.289-292.219.

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In rolling Industries, cold rolls are chosen of low alloy steel heat treated to about 60 RC in 50 millimeter depth on surface. Troostite phase which happens in some cases in tempered martensite has lower fracture toughness, although its ductility is a little more. In rolling process, some technological problems seldom take place, and the roll might be locally heated accidentally. In cold rolling technology, this effect may cause a phase change in metallurgical structure on the surface of the cold work forged steel rolls, named Troostite. However, the rolls which subjected to this problem have

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40

Gimaletdinov, Radiy Kh, Andrey A. Gulakov, and Ildar Kh Tukhvatulin. "Effect of chemical composition on the performance of centrifugally cast indefinite chilled cast iron rolls." Vestnik of Nosov Magnitogorsk State Technical University 17, no. 1 (2019): 32–36. http://dx.doi.org/10.18503/1995-2732-2019-17-1-32-36.

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Problem Statement (Relevance): An urgent task of rolling mill operators includes minimizing the cost of manufactured products while ensuring the required quality. To accomplish the task, measures are being taken to optimize the rolling process aimed at increasing the duration of the rolling campaigns and reducing the number of roll regrinds. The performance of the rolls is influenced by the properties of the working layer material which determine wear resistance, formation and development of fire cracks, as well as resistance to metal sticking. Finishing mill rolls dictate the surface quality

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41

Song, Guang Yi, Xiao Chen Wang, Quan Yang, and Jian Wei Zhao. "Optimization Technology of Roll Contours during Skin-Pass Rolling Process of Hot-Rolled Strip." Materials Science Forum 944 (January 2019): 237–46. http://dx.doi.org/10.4028/www.scientific.net/msf.944.237.

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The hot-rolled strip skin-pass mill is the important technological equipment of finishing process in the hot rolling plant, and its role is to apply a slight thickness reduction of approximately 1% - 4% to the finished products cooled to room temperature to repair flatness defects and improve the surface quality and mechanical properties. In this study, the initial flat roll contours were optimized to solve some problems such as the serious and non-uniform wear of work rolls and the poor shape control abilities of the strip. A three-dimensional rolls–strip coupling model of hot-rolled strip sk

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Kinzin, D. I., S. A. Levandovskiy, and O. N. Tulupov. "Analysis of Efficiency of Roll Pass Design Options for Roughing Stands of Section Rolling Mill." Solid State Phenomena 265 (September 2017): 1136–41. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.1136.

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The analysis of two roll pass design options of ten roughing stands atOJSC “MMK” 370 rolling mill has been performed. The usage of a new form of the roll grooves will allow achieving higher durability of the rolls. Lesser rolls consumption will allow saving up to 800K rubles annually. More uniform load distribution by the stands will reduce the possibility of main mill lines equipment breakdowns due to the jumps of rolling torque in the most loaded non-equiaxial stands. Better contact conditions and higher billet stability at the input into equiaxial grooves will reduce the amount of metal clo

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Li, Ming, Yong Jiang Zheng, Guang Xian Shen, and Jing Liang Ma. "Four-High Mill with Statically Determinate Characteristics of Micro Displacement of the Components." Advanced Materials Research 97-101 (March 2010): 2015–20. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.2015.

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The theory of micro dimensional behavior on rolling mill is used for a typical 450 mm hot plate four-high mill. A statically determinate device is adopted on the back-up roll system to adapt to the micro-dimensional deflection. We replace the traditional single base with the force divided base for the rolling load. To make the rolls parallel, a worm-screw device is set in the chock, with a clearance between the chock and the stand window to allow convenient roll replacement and retain a thermal expansion space. In the new mill, the center line of the roll body is constant when the rolling is s

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Li, Bo, Qing Dong Zhang, and Xiao Feng Zhang. "Effect of Three Types of Driving Modes of Rolling Mill with Six Rolls on the Friction Force between Rolls." Advanced Materials Research 572 (October 2012): 176–80. http://dx.doi.org/10.4028/www.scientific.net/amr.572.176.

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Three-dimensional finite element model of rolling mill with six rolls in a factory is modeled by nonlinear FEM software called ABAQUS. It is a three-dimensional elastic-plastic rolling model. It includes not only elastic-plastic deformation of strip but also the bending of roll system and flattening of rolls. It can describe the changes in friction force between rolls better. Conclusions are as follows. When the driving roll is the backup roll, friction force between the backup roll and the intermediate roll is easy to reach the maximum value, slipping phenomenon is easy to appear. When the dr

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Peng, Rongrong, Xingzhong Zhang, and Peiming Shi. "Vertical–Horizontal Coupling Vibration of Hot Rolling Mill Rolls under Multi-Piecewise Nonlinear Constraints." Metals 11, no. 1 (2021): 170. http://dx.doi.org/10.3390/met11010170.

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This study establishes a vertical–horizontal coupling vibration model of hot rolling mill rolls under multi-piecewise nonlinear constraints considering the piecewise nonlinear spring force and piecewise nonlinear friction force constraints of the hydraulic cylinder in the vertical direction of the rolls, the piecewise stiffness constraints in the horizontal direction, and the influence of the nonlinear dynamic rolling force in the rolling process. Using the average method to solve the amplitude–frequency response equation of the coupled vibration system and taking the actual parameters of a 17

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Zuyeu,, I. A., and Yu L. Bobarikin. "WAYS TO INCREASE QUALITY OF PRODUCTS AT THE BAR STOCK WIRE ROLL MILL 150 IN OJSC «BSW» – MANAGEMENT COMPANY OF HOLDING «BMC»." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 3 (October 10, 2017): 24–26. http://dx.doi.org/10.21122/1683-6065-2017-3-24-26.

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Rakhmanov, S. R. "Some peculiarities of the process of the pipe purse firmware on the firmware." Metallurgicheskaya i gornorudnaya promyshlennost, no. 1 (2019): 31–39. http://dx.doi.org/10.33101/s001-1700087840.

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Purpose. Conducting research aimed at choosing the rational modes of flashing the tubular billet by stabilizing the dynamic characteristics of the drive power line of heavy-duty piercing mills TPA. Methodology. The dynamics of the power line of the piercing mill of the pipe-rolling unit (TPA) are considered, taking into account the peculiarities of the behavior of the spindle hinges and the mechanism for setting the work rolls. Findings. The differential equation of motion of the line of the main drive of the piercing mill is composed and its numerical solution is given. An adapted three-mass

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Zhou, Xiao Min, Yang Jun Mao, and Yun Feng Wu. "Tapered Work Roll Shape Design and Optimization for Cold Tandem Rolling Mill." Advanced Materials Research 562-564 (August 2012): 772–76. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.772.

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K-WRS technology has a better edge drop control effect in cold tandem rolling mill, but it still exists some problems such as contact pressure peak beyond the limit, transition peak and the uneven distribution of contact pressure between the rolls in practical application. In this paper, tapered work roll shape is designed and optimized. The simulation analysis shows that the optimized roll shape not only can effectively control the edge drop of strip，but also can improve the contact pressure between the rolls. At the same time, it also can reduce the influence on the flatness control from the

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Wang, Jun Sheng, Xiao Feng Yu, Lei Song, and Sheng Li Li. "Four-High Cold Rolling Mill for Control of Edge-Drop and Thrust Force." Advanced Materials Research 145 (October 2010): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amr.145.57.

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In the paper, control principle and working characters of T－WRS&C（Taper Work Roll Shifting and Crossing）cold rolling mill are analyzed. The working schedule and control parameters are worked out. The mill working modes are determined according to different working conditions. The taper work roll shifting is used for edge drop control and the work roll crossing is used for thrust force control when work rolls shifting. The actual application verifies that the edge drop and thrust force can be controlled effectively during cold strip rolling.

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Krivtsova, Olga, Alexandr Viventsov, Vitaly Talmazan, Eugeny Panin, and Alexandr Arbuz. "Study of Deformation's Indexes of Rolls of Different Designs." Applied Mechanics and Materials 378 (August 2013): 394–96. http://dx.doi.org/10.4028/www.scientific.net/amm.378.394.

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The elastic deformation of rolls influences the final thickness, thickness variations of strip and distribution of contact stresses. Prospective direction to address the problem of ArcelorMittal Temirtau JSC is the use of new roll materials. Calculating of elastic deformation of four-roll unit of continuous wide-strip hot rolling mill 1700 at ArcelorMittal Temirtau JSC for the actual profile of rolls of the "old", "modern" and "up-to-date" designs. Calculations have showed that during the use of rolls of "up-to-date" design AS1180HH in stands 6-8 bend deflection is reduced by 35-36.8%, and the

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