Shvidchenko N.V., Lukyanov S.I., Pishnograev R.S., Shvidchenko D.V., Krasilnikov S.S. Speed Rate Optimization of the Run-Out Table of a Hot Strip Mill

download PDF

Abstract

The existing method of run-out table drive control at the hot strip mill ensures the required strip tension by setting a difference between the speeds of the delivered strip and roller bodies. Such difference results in a higher wear rate of roller bodies and their more frequent replacement entailing high expenses. Thus, a currently important objective is to increase efficiency of run-out table drives on hot strip mills. The research group carried out experimental research of run-out table roller motor torque elements at a hot strip mill, PJSC MMK. The paper uses analytical methods to solve algebraic equations, computer modeling methods and statistical methods to process run-out table motor current variation diagram. As a result of the research performed, the authors offered the methodology to calculate the required run-out table roller drive load torque. They also adjusted the mandatory process requirements for a run-out table roller drive with regard to a decreased wear rate of roller bodies and the improved strip surface quality. The authors developed a method and a functional diagram to control the drive of run-out table rollers ensuring compliance with new process requirements. A special feature of the diagram is a computing block calculating run-out table roller motor torque according to the process requirements and relevant reference motor armature speed. The efficiency of the offered technical solutions was under an experimental evaluation. As a result, for 13 percent of rolled strips the difference between speeds of the run-out table rollers and the strip in a strip head delivery mode decreased by 50% or even more, while providing the necessary tension in the strip.

Keywords

Hot strip mill, run-out table, run-out table drive, run-out table drive control system, wear of roller bodies, strip laminar cooling, optimizing speed of a run-out table.

Nikolay V. Shvidchenko

Ph.D. (Engineering), Associate Professor, the Department of Electronics and Microelectronics, Power Engineering and Automated Systems Institute, Magnitogorsk State Technical University, Engineer, OSC «Technoap Engineering», Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0002-3917-9218.

Sergey I. Lukyanov

D.Sc. (Engineering), Professor, Head of the Department, Department of Electronics and Microelectronics, Power Engineering and Automated Systems Institute, Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0003-4685-7627

Roman S. Pishnograev

Ph.D. (Engineering), Leading Engineer, OSC «Technoap Engineering», Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0001-8854-5723.

Dmitry V. Shvidchenko

Ph.D. (Engineering), Associate Professor, Vice Director, «Technoap Engineering», Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0003-1932-9239.

Sergey S. Krasilnikov

Ph.D. (Engineering), Engineer, OSC «MMK-Informservice», Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0003-3131-7193

1. Davilbekov N.Kh., Klementev V.A., Kurpanov G.G. Increasing durability of run-out table rollers on sheet mills. Stal [Steel], 2003, no. 10, pp. 44-47. (In Russian)

2. Polyakov B.A., Varshavsky E.A., Karetny Z.P. Experience with increasing efficiency of the run-out table on the continuous hot strip mill. Stal [Steel], 1987, no.9, pp. 64-67. (In Russian)

3. Alimbetov A., Kaliyev Y., Zhauyt A., Yestemessova G., Yussupova S., Nurbakyt M. Calculation of the stress-strain state of the deflector rollers. Vibroengineering PROCEDIA. 2018. Vol. 18. Pp. 183-188. doi: 10.21595/vp.2018.19861.

4. Yoshikazu M., Toshio S., Takayuki T. Method for controlling speed of roller table of rolling mill 1995, JPH091219A.

5. Yoshiyuki K. Control method for roller table driving of rolling mill 1995, JPS61262416.

6. Antonov V.M., Abiev A.G., Kavygin V.V., Belyanskiy A.D., Kotlyuba G.N. Sposob regulirovaniya skorosti vrashcheniya rolikov otvodyashchego rol'ganga shirokopolosnogo stana goryachey prokatki [Method for controlling rotational speed of run-out table rolls of a wide strip hot rolling mill]. Patent RF, no. 1045763, 1983.

7. Yajun W. Designing of hot strip rolling mill control system. World Journal of Engineering and Technology. 2016. No. 4. Pp. 413-417.

8. Titov A.V., Lukyanov S.I., Shvidchenko N.V., Shvidchenko D.V., Mushtaev A.N., Bochkovskij N.I. Sposob upravleniya skorostnym rezhimom otvodyashchego rolganga shirokopolosnogo stana [Control method of velocity mode of outgoing roller table of wide-strip rolling mill]. Patent RF, no. 2373006, 2009.

9. Lukyanov S.I., Pishnograev R.S., Shvidchenko N.V., Muhin A.P., Lazarenko A.S., Yudina A.A., Astaf'ev E.V. A diagnosis system of a run-out roller table drive on hot rolling mill 2000. Vestnik MGTU im. G.I. Nosova [Bulletin of Nosov Magnitogorsk State Technical University], 2005, No. 4(12), pp. 51-53. (In Russian)

10. Klyuchev V.I. Teoriya elektroprivoda [Theory of Electric Drive]. Moscow, Energoatomizdat, 2001, 704 p. (In Russian)

11. Polyakov B.A., Zubkov Yu.S., Varshavsky E.A., Volodin V.V. Pulling force of a run-out roller table of the hot strip mill. Izvestiya vuzov. Chernaya metallurgiya [Izvestiya. Ferrous Metallurgy], 1986, no. 10, pp. 64-67. (In Russian)

12. Lukyanov S.I., Shvidchenko N.V., Pishnograev R.S. Run-out roller table drive control system on the hot strip mill. Vestnik IGEU [Vestnik IGEU], 2012, iss. 6, pp. 95-99. (In Russian)

13. Honda T., Nakagawa S., Tachibana H., Uematsu C., Buei Y., Sakagami K. Temperature measurement technology in water cooling process and high accuracy cooling control technology for high tensile hot rolled strip. Nippon Steel & Sumitomo Metal Technical Report. 2016. No. 111. Pp. 18-23.

14. Diez D.M., Barr C.D. Cetinkaya-Rundel M., Dorazio L. Advanced High School Statistic. OpenIntro Inc., First Edition, 2014. 402 p.

Details
Hits: 686