DIAGNOSTICS OF ROLLING MILLS IN TRANSIENT OPERATING MODES

Authors:

V.V. Verenyov
Iron and Steel Institute of Z.I. Nekrasov of the  NAS of Ukraine, Dnipro, Ukraine.
https://orсid.org/0000-0002-2561-5365

Reviewers:

V. Bilodidenko,
Doctor of Technical Sciences, Professor of Ukrainskyi State University of Science and Technology. Dnipro.

Yu. Prykhodko,
Dr. Sci. (Engin), Senior Research Scientist, Iron and Steel Institute of Z.I. Nekrasov of the  NAS of Ukraine, Dnipro.

I. Sokol,
doctor of technical sciences, professor of Dnipro National University University named after Olesya Honchara. Dnipro.

Affiliation:

Project: Scientific book

Year: 2024

Publisher: PH "Naukova Dumka"

Pages: 112

DOI:

https://doi.org/10.15407/978-966-00-1930-0

ISBN: 978-966-00-1930-0

Language: Ukrainian

How to Cite:

Abstract:

The variety of vibrodynamic processes in the main drive lines of cage rolls of sheet rolling mills 1680, 1700, 2000, 2500 (Zaporizhia, Mariupol, etc.) during strip capture by rolls and interaction of cages across the strip is presented. Different types of transient processes are presented on the moment of elastic forces on the spindles and on the shaft between the reducer and the motor in cages of continuous hot rolling conditions. On the basis of experimental and industrial measurements of moment and vibration, new methods and methods of diagnosis, which use parameters of transient processes, have been developed and substantiated. These include, for the first time, the delay time of the reaction of the sections of the drive line to the shock load and the speed of propagation of the shock wave from the rolls to the engine. The greater the wear, clearances and their opening in the spindle connection, the longer the response time of the sections and the lower the speed of propagation of the elastic torsional wave along the drive line. For the first time, the existence of a statistical dependence in the form of correlation fields of the maximum dynamic moment during the gripping of the strip by rolls, the moment in the steady state of rolling, and the method of using the fields for diagnostic purposes is shown. The combined use of the coefficients of variation of the maximum dynamic moment, the coefficient of dynamism and the static moment is proposed. The combination and comparison of pairs of their numerical values has diagnostic properties. The use of features of rolling technology is shown, for example, rolling in two adjacent cages, four-thread rolling, constructions, etc. Examples of the use of new methods of diagnosis are given, which prove their efficiency.

For engineering and technical workers of metallurgical plants, design bureaus, research and educational institutes, it can be useful for graduate students, students of relevant specialties.

Keywords:

rolling mill, rolls, cage, drive line, equipment, moment, vibration, transient processes, delay  time, wave speed, correlation field, technical condition, diagnostics

References:

1. Technical diagnostics of mechanical equipment. / V.A.Sidorov, V.M. Kravchenko, V.Ya. Sedush and others. Donetsk. 2003. – 125 p.
2. Diagnosis of mechanical equipment of metallurgical enterprises. / Sedush V.Ya., Kravchenko V.M., Sidorov V.A. ta in. Monograph. Donetsk 2004. 98 p.
3. Kiyanovsky N.V. New sections in the theory and practice of machine reliability. – Krivoy Rog. – Mineral. 1998. – 270 p.
4. Diagnostics and dynamics of rolling mills / Verenev V.V., Bolshakov V.I., Putnoki A.Yu. and others. Monograph. Dnepropetrovsk: IMA-PRES. – 2007. – 144 p.
5. Kadilnikova T.M., Provolotsky A.E. Monitoring systems for assessing the technical condition of machines. Dnepropetrovsk: “Thresholds”. 2005. – 172 p.
6. Bіlodidenko S.V., Bіlichenko G.I., Ganush V.I. Technical diagnostics of metallurgical installation. Part 1. Theory of technical maintenance and diagnosis of mechanical systems / Dnipropetrovsk: NMetAU. 2012. – 81 p.
7. Bіlodidenko S.V., Bіlichenko G.I., Ganush V.I. Technical diagnostics of metallurgical installation. Part 2. The theory of maintenance with safety control of mechanical systems and the practice of their diagnosis in metallurgy. /Dnipropetrovsk: NMetAU. 2013. – 87 p.
8. Belodedenko S.V., Ibragimov M.S. Issues of frequency of monitoring the technical condition of mechanical systems in metallurgy. Monograph. – Dnepr. LizunovPress. 2017. – 80 p.
9. Technical diagnostics. Control and forecasting // A.Ya. Zhuk, G.P. Malyshev, N.K. Zhelyabin, O.M. Klevtsov. – Zaporozhye: Publishing House of the Zaporozhye State Engineering Academy. – 500 s.
10. Ulyanitsky V.N. Technical diagnostics of metallurgical equipment. Tutorial. – Alchevsk. DSMI. 2004.–186 p.
11. Partsevsky A.B., Tarasova L.K. Diagnostics of metallurgical equipment at Japanese factories. // Bull. Ferrous metallurgy. – 1984. – No. 7. – M. 26-34.
12. Goer T., Lyul G. Observation of units in ferrous metallurgy. // Black metals. July 2001. – pp. 36-40.
13. Pekels J., Mitten K., Schlesser A. et al. Diagnostics of the state of highly loaded finishing blocks of a wire mill // Chernye Metally, No. 6, 1992. – P. 36-41.
14. Geigemueller G., Klapport U., Leitritz U. Diagnostics of units in rolling shops // Ferrous metals. – 1996. – No. 12. – P. 48-50.
15. Schwartz M., Weissburch F. Analysis of the operation of equipment on the wire mill of the Walzdrat Hochfeld company // Ferrous metals. January. 1996. – P.30-37.
16. Arens M. RoCoCo-modular system for monitoring the operation of rolling mills // Ferrous metals. March. 1999.-P.18-23.
17. Meckel J., Geropp W., A. Asch. Application of computerized monitoring and diagnostic systems at rolling mills. // Black metals. – 1999. – No. 12. – P. 53-60.
18. Böttner D., Ungerer W.. Possibilities of quality assurance by monitoring technology and equipment condition in cold rolling mills. // Black metals. 1997. – No. 12. – P. 20-26.
19. Schaefer H.-Yu.. The state of diagnostics of machines in ferrous metallurgy // Ferrous metals. June. 2001. – pp. 28-31.
20. Diagnostic and monitoring systems in ferrous metallurgy / Aigner X., Helekal G., Hochreiter V. et al. // Ferrous metals. June. 2001. – P. 41-45.
21. Zaytsek H., Aigner H., Helekal G. / Extensive monitoring of the sheet-rolling plant VoestalpineStahl/METEC Congress-2003, Dusseldorf, 16-20 June, 2003. – P. 419-422.
22. Complex of automatic vibration diagnostics of rolling mill equipment. A.V. Baiglay, A.M. Guzeev, M.M. Kipin, S.V. Filipov // “Technical diagnostics and non-invasive control.” Kyiv. 2020. – No. 3. – P. 30-35.
23. Vibration diagnostic system for rolling production equipment. A.V. Baglay, V.V. Vorobyov, A.N. Guzeev, M.M. Kipin // “Ferrous metals”. 2020. No. 2. – P. 50-69.
24. Baglay A.V., Kipin M.M., Dubina M.O. Vibration diagnostics of the gearbox of the wide-smooth mill 1680. “Technical diagnostics and non-failure control.” Kiev, 2019. – No. 1. – P. 53-57.
25. Verenev V.V. Diagnostics of the technical condition of equipment based on data from vibration-dynamic processes in transient operating modes of rolling mills. / Proceedings of the 4th Congress of distributors. M.: JSC “Chermetinformatsiya”. 2002. – P.273–276.
26. Verenev V.V. Dynamic processes in cold strip mills. Monograph. – D.: LIRA, 2015. – 112 p.
27. Verenev V.V. Dynamic processes in wide-band hot rolling mills. Monograph. – D.: Lithographer. 2018. – 158 p.
28. Verenev V.V. Dynamics of continuous rolling of strips with welded seams. Monograph. Dnipro: LLC “Dominanta Print”. 2020. – 54 p.
29. Verenev V.V., Putnoki A.Yu., Podobedov N.I. Transient processes during continuous rolling. Monograph. -D.: Litograf, 2017. – 116 p.
30. Dynamic processes in the stands of a broadband mill 1680. Verenev V.V., Bolshakov V.I., Putnoki A.Yu. and others. Monograph. – Dnepropetrovsk: IMAPRESS. – 2011. – 184 p.

31 31. Verenev V.V., Podobedov N.I. Statistical modeling of dynamic loads in broadband mills. Monograph. – Dnepr: LIRA. 2021. – 74 p.

32. Dynamics of rolling processes / Kotsar S.L., Tretyakov V.A., Tsuprov A.N., Polyakov B.A. // M.: Metallurgy. 1997.- 255 p.
33. Non-destructive testing of metals and products. Handbook ed. G.S. Samoilovich. M.: Mechanical Engineering, 1976. – 450 p.
34. Konovalov L.V. Load, fatigue, reliability of metallurgical machine parts / L.V. Konovalov // Metallurgy, 1981.–280 p.
35. Polyakov B.N. Comparative analysis of statistical characteristics of rolling mill equipment load / B.N. Polyakov // Steel. – No. 10. – P. 86-87.
36. Grebenik V.M., Tsapko V.K. Reliability of metallurgical equipment (assessment of operational reliability and durability): Handbook. – M.: Metallurgy, 1989. – 592 p.
37. Verenev V.V., Reduction of dynamic loads and diagnostics of wide-band mills in transient modes. Monograph. Nikopol: SPD Feldman O.O., 2014. – 203 p.
38. Patent of Ukraine No. 70137A. Method of designing a technical mill for installing the torsion system of the head drive line of a rolling mill / Verenyov V.V., Yunakov O.M., Dalichuk A.P. ta in.. Application 12/26/2003. Overhead 09/15/2004. Bull. No. 19.
39. Patent No. 87827 Ukraine, IPC (2009) G01М7/00, G01М 15/00. Method of significant change of the technical mill for articulating the work roll – spindle line of the head drive of the rolling mill / V.V. Verenyov, M.I. Podobedov, O.Yu. Putnoki i in. (Ukraine). – a 2006 07272; appl. 06/30/2006; publ. 08/25/2009, Bulletin. No. 16.
40. Patent 86640 Ukraine MPK (2009) G01М7/00, G01М13/00. Method of designing a technical mill for gearing of a gearbox of a line drive of a rolling mill / V.V.Verenov, A.P. Dalichuk, V.V. Root [ta insh.] (Ukraine); applicant and patent holder Institute of Ferrous Metallurgy im. Z.I. Nekrasov NAS of Ukraine. – No. a200702387; appl. 03/05/07; publ. 05/12/09. Bull. No. 9.
41. Patent 87575 Ukraine MPK (2009) G01М7/00, G01М13/00. A method for calculating the technical mill of the cutting line of the head drive of the first stand with continuous rolling of the workpiece in two adjacent stands / V.V. Verenyov, V.V. Korenny, S.V. Matsko [ta insh.] (Ukraine); applicant and patent holder Institute of Ferrous Metallurgy im. Z.I. Nekrasov NAS of Ukraine. – No. a 2007 12228; appl. 05.11.06; publ. 07/27/2009. Bull. No. 14.