DOI: https://doi.org/10.15587/2312-8372.2018.151762

### Search for the ways to improve the operational reliability of the rolling mills

Vyacheslav Tarasov, Vladislav Rumyantsev, Yuri Mosejko, Alexander Potapenkov

#### Abstract

The object of research is the hinge unit of the universal spindle of rolling mills. The most common for such conditions are used hinges with anti-friction liners with sliding friction. One of the most problematic parts of the hinge with sliding friction is the uneven distribution of pressure on the contact surface of the segments, which reduces the wear resistance of liners and operational reliability of the spindle. To identify the causes of uneven pressure and determine areas of significant excess of torsion loads, studies are carried out on the developed mathematical model of the hinge.

In the course of the research, a mathematical analysis of the influence of the parameters of liners on the magnitude of pressure on the contact surfaces under the working loads of the roller blades and segments of the hinge liners is used. The parameters of the zones of high pressure in the contact liners typical forms in the form of a continuous segment with flat and cylindrical surfaces. It is established that it is necessary to change the liner section plane along the length and width of the segment.

Analytical dependences of the hinge parameters on the active loads and pressure are obtained. The formulas for determining the geometric dimensions of the hinge segments with regard to its radius and rigidity are derived. The study of the hinge with inserts, in which bevels on a flat surface and slopes to the ends along the length and from the middle to the side faces, indicates the possibility of uniform distribution of pressure along the length and width of the segments of the inserts.

Thus, research on the mathematical model and in the laboratory has shown that it is advisable to use the developed design of the liner with a variable section plane along the length and width of the liner. The uniform distribution of contact loads is confirmed by pressure plots along the length and width of the segments. This makes it possible to increase the wear resistance of the hinge joint of universal spindles of powerful rolling mills. Compared with the known designs of hinges, the operational reliability of the spindles and the period of trouble-free operation of states are significantly increased.

#### Keywords

rolling mill reliability; universal spindle; contact pressure; wear uniformity

#### Full Text:

PDF PDF (Українська)

#### References

Kravchenko, V. M., Sidorov, V. A., Butsukin, V. V. (2012). Iznos lopastey universal'nogo shpindelya prokatnogo stana. Vіsnik PDTU, 24, 262–265.

Sidorov, V. A., Nizhnik, N. V. (2005). Zakonomernost' iznosa vkladyshey universal'nogo shpindelya prokatnykh stanov. Metallurgicheskaya i gornorudnaya promyshlennost', 33, 94–96.

Plakhtin, V. D., Ivochkin, M. Yu., Dmitryuk, S. O. (2011). Issledovanie sharnira sharovogo shpindelya stana 250. SAPR i grafika, 4, 32–35.

Lou, S., Guo, P., Luo, D., Song, Z., Wei, H. (2014). Fracture Failure Analysis of Main Drive Spindle and Working Roll in 1780 Mill R2 Rougher Mill. Jixie Qiandu, 36 (5), 809–812.

Buzyuma, R. V., Kharitonenko, A. A. (2018). Otsenka konstruktivnykh i tekhnologicheskikh parametrov pri modernizatsii shpindel'nogo soedineniya privoda kleti tonkolistovogo stana goryachey prokatki. Povysheniya nadezhnosti metallurgicheskogo proizvodstva. Lipetsk: LiGTU, 134–137.

Ivochkin, M. Yu., Gurevich, Yu. A., Dmitryuk, S. O. (2014). Issledovanie napryazhenno-deformirovannogo sostoyaniya elementov valkov prokatnykh stanov. Izvestiya Moskovskogo politekhnicheskogo universiteta, 5 (4 (22)), 13–16.

Potapenkov, A. P., Kasperovich, E. B., Tkachenko, A. A. (1984). A.C. 1103914 SSSR. Vkladysh sharnira universal'nogo shpindelya. MPK V 21 b 35/14 / No. 3511064/22; declareted: 17.11.80; published: 23.07.84, Bul. No. 27.

Shubin, A. G., Loginov, B. M., Gasiyarov, V. R. (2011). Obosnovanie sposobov ogranicheniya dinamicheskikh nagruzok elektromekhanicheskikh sistem kleti prokatnogo stana. Elektrotekhnicheskie sistemy i kompleksy, 3 (40), 14–25.

Potapenkov, A. P., Pilipenko, S. S., Tarasov, V. K., Serebrennikov, Yu. G., Bayguzin, M. R. (2014). Sovershenstvovanie konstruktsii i metodiki rascheta universal'nykh shpindeley prokatnykh stanov. Naukovі pratsі ZDІA, 1, 158–163.

Proizvodstvenno-inzhiniringovaya kampaniya ENCE GmbH. Available at: http://ence.ch/ru/

#### GOST Style Citations

Kravchenko V. M., Sidorov V. A., Butsukin V. V. Iznos lopastey universal'nogo shpindelya prokatnogo stana // Vіsnik PDTU. 2012. Issue 24. P. 262–265.

Sidorov V. A., Nizhnik N. V. Zakonomernost' iznosa vkladyshey universal'nogo shpindelya prokatnykh stanov // Metallurgicheskaya i gornorudnaya promyshlennost'. 2005. Issue 33. P. 94–96.

Plakhtin V. D., Ivochkin M. Yu., Dmitryuk S. O. Issledovanie sharnira sharovogo shpindelya stana 250 // SAPR i grafika. 2011. Issue 4. P. 32–35.

Fracture Failure Analysis of Main Drive Spindle and Working Roll in 1780 Mill R2 Rougher Mill / Lou S. et. al. // Jixie Qiandu. 2014. Vol. 36, Issue 5. P. 809–812.

Buzyuma R. V., Kharitonenko A. A. Otsenka konstruktivnykh i tekhnologicheskikh parametrov pri modernizatsii shpindel'nogo soedineniya privoda kleti tonkolistovogo stana goryachey prokatki // Povysheniya nadezhnosti metallurgicheskogo proizvodstva. Lipetsk: LiGTU, 2018. P. 134–137.

Ivochkin M. Yu., Gurevich Yu. A., Dmitryuk S. O. Issledovanie napryazhenno-deformirovannogo sostoyaniya elementov valkov prokatnykh stanov // Izvestiya Moskovskogo politekhnicheskogo universiteta. 2014. Vol. 5, Issue 4 (22). P. 13–16.

Vkladysh sharnira universal'nogo shpindelya: A.C. 1103914 SSSR. MPK V 21 b 35/14 / Potapenkov A. P., Kasperovich E. B., Tkachenko A. A. No. 3511064/22; declareted: 17.11.80; published: 23.07.84. Bul. No. 27.

Shubin A. G., Loginov B. M., Gasiyarov V. R. Obosnovanie sposobov ogranicheniya dinamicheskikh nagruzok elektromekhanicheskikh sistem kleti prokatnogo stana // Elektrotekhnicheskie sistemy i kompleksy. 2011. Issue 3 (40). P. 14–25.

Sovershenstvovanie konstruktsii i metodiki rascheta universal'nykh shpindeley prokatnykh stanov / Potapenkov A. P. et. al. // Naukovі pratsі ZDІA. 2014. Issue 1. P. 158–163.

Proizvodstvenno-inzhiniringovaya kampaniya ENCE GmbH. URL: http://ence.ch/ru/