Limitation of dynamic loads of roll steel cells electromechanical systems by means of roll adjustment
DOI:
https://doi.org/10.14529/power180210Keywords:
plate rolling mill, reversible stand, electric drive, dynamic loads, limitation, hydraulic pressure device, roll gap, regulation, method, mathematical modeling, experimental research, pilot operationAbstract
The paper discusses the expansion of the rolling mills gauge due to the flat products production from hard-to-form steels. The research substantiates the relevance of the development of methods used to reduce the dynamic loads of thick plate mill reversible stands electromechanical systems occurring when the rollers grip metal. As it is shown, the control system of the horizontal rolls electric drives of Mill 5000 used at PJSC “Magnitogorsk Iron and Steel Works” (PJSC “MMK”) features no technical solutions providing for a reduction in the dynamic moment and speed deviations under the impact load. The paper presents oscillograms illustrating the unsatisfactory nature of transients during the rolling of hard-formed steel sheets. Thus, a method for limiting the torque by increasing the spacing between the rollers prior to metal gripping followed by the rolls return to a set position is justified. The paper present s a control system scheme with the suggested solution in place. The structure of the mathematical model of a rolling stand mechatronic system is considered. The model includes models of the horizontal rollers electric drive and the pressure devices (PD) hydraulic drive interconnected through metal, while the mathematical dependences describing the transient processes of the hydraulic PD and the change in pressure and moment under deformation are given. The dynamic mode of the workpiece grip with simultaneous change of the gap at various rates of PD movement is performed. As a result, the implementation of the algorithm based on the suggested method in 5000 camp automated process control system is considered a viable method. The oscillograms obtained during the workpiece gripping under the existing and the developed control algorithms are presented. The improvement of the dynamic speed and torque indicators is confirmed. The feasibility of studies aiming at the efficiency evaluation of the developed method implementation in the stands electromechanical systems of broadband and long rolling mills is noted.
References
Baskov S.N., Karandaev A.S., Osipov O.I. [Power-Driven Parameters of Drives and System of Profiled Rolling of Slabs of the Mill 2800]. Privodnaya tekhnika [Drive Technology], 1999, no. 1–2, pp. 21–24. (in Russ.)
Galkin V.V., Karandaev A.S., Golovin V.V., Radionov A.A., Khramshin V.R., Gasiyarov V.R., Zalog-in O.A. [Algorithm for Calculating the Speed and Load Modes of Electric Drives in Rolling Mill Stands for Rolling Thick Strips]. Izvestiya TulGU. Tekhnicheskie nauki [Bulletin of TulGU. Technical Science], 2010, iss. 3, in 5 parts, Tula, TulGU Publ., 2010, part 2, pp. 12–17. (in Russ.)
Tselikov A.I. Teoriya rascheta usiliy v prokatnykh stanakh [Theory of Calculating the Forces in Roll-ing Mills]. Moscow, Metallurgizdat Publ, 1962. 494 p.
Pavlov I.M. Teoriya prokatki [Theory of Rolling]. Moscow, Metallurgizdat Publ., 1950. 610 p.
Vydrin V.N. Dinamika prokatnykh stanov [Dynamics of Rolling Mills]. Sverdlovsk, Metallurgiya Publ., 1960. 256 p.
Radionov A.A. Avtomatizirovannyy elektroprivod dlya proizvodstva stal'noy provoloki [Automated Electric Drive for Production of Steel Wire]. Magnitogorsk, Nosov Magnitogorsk State Technical University Publ., 2007. 311 p.
Radionov А.А., Karandaev A.S., Evdokimov A.S., Andryushin I.Yu., Gostev A.N., Shubin A.G. Math-ematical Modelling of the Interrelated Electric and Mechanical Systems of Continuous Sub-Group of the Roll-ing Mill Stands. Part 1. Development of the Mathematical Model. Bulletin of the South Ural State University. Ser. Power Engineering, 2015, vol. 15, no. 1, pp. 59–73. (in Russ.) DOI: 10.14529/power150108
Khramshin V.R., Karandaev A.S., Radionov A.A., Andryushin I.Yu., Gostev A.N. [Reduction of Dy-namic Loads of Mechanical and Electrical Equipment of the Draft Subgroup of Hot Rolling Mill Stands].Mashinostroenie: setevoy elektronnyy nauchnyy zhurnal [Mechanical Engineering: Network Electronic Scien-tific Journal], 2013, no. 2, pp. 69–77. (in Russ.)
Khramshin V.R., Evdokimov A.S., Kornilov G.P., Radionov A.A., Karandaev A.S. System for Speed Mode Control of the Electric Drives of the Continuous Train of the Hot-Rolling Mill. Proceed-ings of
the 2015 International Siberian Conference on Control and Communications (SIBCON–2015), 2015. DOI: 10.1109/SIBCON.2015.7147264
Andryushin I.Yu., Galkin V.V., Golovin V.V., Karandaev A.S., Radionov A.A.,. Khramshin V.R [Automatic Correction of the Speeds of the Electric Drives of Mill Stands 2000 when Rolling a Pipe Blank]. Izvestiya vuzov. Elektromekhanika [Proceedings of High Schools. Electromechanics], 2011, no. 4, pp. 31–35. (in Russ.)
Khramshin V.R., Karandaev A.S., Evdokimov S.A., Andryushin I.Yu., Shubin A.G., Gostev A.N.
Reduction of the Dynamic Loads in the Universal Stands of a Rolling Mill. Metallurgist, 2015, vol. 59, no. 3–4, pp. 315–323. DOI: 10.1007/s11015-015-0103-8.
Karandaev A.S., Khramshin V.R., Shilyaev P.V., Andryushin I.Yu., Golovin V.V. [Technological Schemes for Controlling Electric Drives of the Finishing Group of a Broadband Hot Rolling Mill].
VII mezhdunar. kongress prokatchikov: sb. tr. [VII Intern. Congress of Distributors: Proceedings]. Moscow, 2007, iss. 1, pp. 71–75. (in Russ.)
Karandaev A.S., Khramshin V.R., Radionov A.A., Andryushin I.Yu., Galkin V.V., Gostev A.N. [Co-ordination of the Speeds of the Interconnected Electric Drives of the Rolling Mill Rolling Stands]. Trudy
VII Mezhdunarodnoy (XVIII Vserossiyskoy) nauchno-tekhnicheskoy konferentsii po avtomatizirovannomu elektroprivodu [Proceedings of the International Research Institute of the All-Russian Scientific and Technical Conference on Automated Electric Drives], Ivanovo, 2012, pp. 652–657. (in Russ.)
Karandaev A.S. [Perfection of the Automated Electric Drives of Aggregates of Rolling Manufacture]. Mashinostroenie: setevoy elektronnyy nauchnyy zhurnal [Mechanical Engineering: Network Electronic Scien-tific Journal], 2014, no. 1, pp. 3–15. (in Russ.)
Gasiyarov V.R., Maklakova E.A. [Mathematical Description of the Main Electric Drive of a Thick Plate Mill 5000 Hot Rolling]. Elektrotekhnika: setevoy elektronnyy nauchnyy zhurnal [Electrical Engineering: Web-Based Electronic Scientific Journal], 2015, iss. 2, no. 3, pp. 62–66. (in Russ.)
Shubin A.G., Loginov B.M., Gasiyarov V.R., Maklakova E.A. [Substantiation of Ways to Limit Dy-namic Loads of Electromechanical Systems of Rolling Stand Mill]. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2018, no. 1(38), pp. 14–25. (in Russ.) https://doi.org/10.18503/2311-8318-2018-1(38)-14-25
Khramshin V.R., Gasiyarov V.R., Karandaev A.S., Baskov S.N., Loginov B.M. Constraining the Dy-namic Torque of a Rolling Mill Stand Drive. Bulletin of the South Ural State University. Ser. Power Engi-neering, 2018, vol. 18, no. 1, pp. 101–111. DOI: 10.14529/power180113
Karandaev A.S., Khramshin V.R., Andryushin I.Yu., Petryakov S.A., Khramshin R.R. [Method for Correcting the Thickness of the Head Portion of a Strip in a System for Automatically Adjusting the Thick-ness of
a Broadband Hot Rolling Mill]. Elektrotekhnika [Electrical Engineering], 2013, no. 8, pp. 34–38. (in Russ.)
Khramshin V.R., Khramshina E.A., Karandaev A.S., Gasiyarov V.R., Voronin S.S. Control Methods and Systems Providing Reduced Consumption Index at Rolled Product Manufacture at Plate Mill. Proceedings of
the IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRus), 2017, pp. 1540–1544. DOI: 10.1109/EIConRus.2017.7910865.
Khramshin V.R., Andryushin I.Yu., Gostev A.N., Karandaev A.S. [Mathematical Model of Intercon-nected Electrotechnical Systems of a Continuous Group of a Broadband Mill]. Mashinostroenie: setevoy el-ektronnyy nauchnyy zhurnal [Mechanical Engineering: Network Electronic Scientific Journal], 2013, no. 1, pp. 12–21.
(in Russ.)
Karandaev A.S., Khramshin V.R., Andryushin A.Yu., Golovin V.V., Shilyaev P.V. [Mathematical Modeling of Interconnected Electromechanical Systems of the Intercellular Gap of a Broadband Hot Rolling Mill].
Izv. vuzov. Elektromekhanika [Proceedings of Universities. Electromechanics], 2009, no. 1, pp. 12–20. (in Russ.)
Baskov S.N., Gasiyarov V.R., Loginov B.M., Khramshin V.R., Odintsov K.E. [Development of Mathe¬matical Model of Interconnected Electrotechnical Systems of Stand of Thick Plate Rolling Mill]. Izvestiya vuzov. Elektromekhanika [Proceedings of Universities. Electromechanics], 2017, iss. 60, no. 6, pp. 55–64.
(in Russ.)
Kuzishchin V.A., Gedymin Yu.Yu. [Modeling of Hydraulic Pressing Devices of Rolling Mills]. Kon-struirovanie i issledovanie sovremennykh prokatnykh stanov: Sb. nauch. trudov. [Modern Rolling Mills De-sign and Research: Collection of Research Papers], 1985, pp.113–118. (in Russ.)
Braun A.E., Dralyuk B.N., Tikotskiy A.E. [Some Questions of the Dynamics of Hydraulic Clamping Devices]. Elektrotekhnicheskaya promyshlennost'. Ser. Elektroprivod [Electrotechnical industry. Ser. Electric Drive], 1982, iss. 8, pp. 13–17. (in Russ.)
Khramshin V.R. Razrabotka elektrotekhnicheskikh sistem nepreryvnoy gruppy stana goryachey pro-katki pri rasshirenii sortamenta polos: avtoref. dis. d-ra tekhn. Nauk [Development of Electrotechnical Sys-tems of
a Continuous Group of a Hot Rolling Mill with the Widening of the Range Gauge. Abstract of Doct. Scie. Diss.]. Magnitogorsk, FGBOU VPO “MGTU” Publ., 2013. 40 p.
Galkin V.V., Petryakov S.A., Karandaev A.S., Khramshin V.R. [Automatic Correction of the Thick-ness of the Head Portion of the Strip in the Hydro-SART of a Broadband Hot Rolling Mill]. Izvestiya vysshikh uchebnykh zavedeniy. Elektromekhanika [News of Higher Educational Institutions. Electromechanics], 2011, no. 4, pp. 46–50. (in Russ.)
Hramshin V.R., Karandaev A.S., Radionov A.A., Hramshin R.R. Study of Thickness Control of Strip Head Section Using Mathematical Simulation Methods. Bulletin of South Ural State University. Ser. Power Engineering, 2013, iss. 13, no. 1, pp. 144–151.
Karandaev A.S., Radionov A.A., Khramshin V.R., Andryushin I.Yu., Shubin A.G. Automatic Gauge Control System with Combined Control of the Screw-Down Arrangement Position. 12th International Confe-rence on Actual Problems of Electronic Instrument Engineering (APEIE), Novosibirsk, 2014, vol. 1, pp. 88–94. DOI: 10.1109/APEIE.2014.7040794.
