Designing Bearing Supports for Roller Assemblies of Three-Roll Helical Rolling Mills

For successful deformation of a wide range of materials, modern helical rolling mills must be highly reliable and have an increased load capacity that would guarantee high surface quality and geometrical accuracy of the rolled stock. This article discusses the problem of designing bearing supports for the roller units of three-roll mills for screw and radial-shear rolling with a high load capacity. The application of design methods that take into consideration turning angles of the rolls when feeding and rolling off the stock, make it possible to increase the space available for a bearing with a higher load capacity. The results of studies of a wide range of feed and rolling angles used in modern roll mills of this type are presented. The most significant features for determining the space for a bearing in the support, nearest to the axis of rolling, are described. The authors propose a method that provides an increase in the diameter of the bearing support by displacing the roller relative to its classical position in the drum or holder of the mill stand.

References

[1] Galkin S. P., Fadeev V.A., Gusak A.Iu. Sopostavlenie analiza geometrii mini-stanov radial’no-sdvigovoi (vintovoi) prokatki [Comparative analysis of geometry of mini-mills of radial-shearing (screw) rolling]. Proizvodstvo prokata [Rolled Products Manufacturing]. 2015, no. 12, pp. 19–25.

[2] Galkin S.P., Romantsev B.A., Kharitonov E.A. Realizatsiia innovatsionnogo potentsiala universal’nogo sposoba radial’no-sdvigovoi prokatki [Realization of innovation potential universal method of radial-shear rolling]. Chernye metally [Ferrous metals]. 2015, no. 1, pp. 23–28.

[3] Sigalov Iu.M., Bakhtinov Iu.B., Komarov V.M. Kozlov A.N. Sovershenstvovanie prokatki prutkov iz titanovogo splava VT16 s ustraneniem peregruzki stana posredstvom optimizatsii kalibrovki valkov [Improvement of the rolling rods of titanium alloy ВТ16 with the elimination of overloading of the mill through optimization of the calibration of the rolls]. Tekhnologiia legkikh splavov [Technology of light alloys]. 2011, no. 4, pp. 86–89.

[4] Nikulin A.N. Vintovaia prokatka. Napriazheniia i deformatsii [Screw rolling. Stress and strain]. Moscow, Metallurgizdat publ., 2015. 380 p.

[5] Zimin V.Ia., Pakhomov V.P., Onuchin A.B., Romantsev B.A., Goncharuk A.V., Davydova E.A. Opyt prokatki trub na kalibrovochnom stane vintovoi prokatki TPA 70-270 OAO «Vyksunskii metallurgicheskii zavod» i sovershenstvovanie kalibrovki rabochikh valkov [Experience in rolling the tubes in the sizing 20-270 tube mill for screw rolling and improvement in work roll grooving at Vyksunskij Metallurgicheskij Zavod open-end joint stock company]. Proizvodstvo prokata [Rolled Products Manufacturing]. 2011, no. 2, pp. 11–14.

[6] Potapov I.N., Polukhin P.I. Tekhnologiia vintovoi prokatki [Technology helical rolling]. Moscow, Metallurgiia publ., 1990. 344 p.

[7] Schlapp M. Selection of rolling bearings for the rolling mill technology (Wälzlagerauswahl für die Walzwerkstechnik). Konstruktion, 2012, is. 5, pp. 27–33.

[8] Kharitonov E.A., Burov I.A., Romanenko V.P., Vol’shonok I.Z. Sovershenstvovanie metodiki rascheta geometrii ochaga deformatsii i kalibrovok valkov stanov radial’no-sdvigovoi prokatki pri bol’shikh uglakh podachi [The methodology used for calculating the geometry of the deformation and calibration of the rolls of the mill of radial-shear rolling at high angles of flow]. Izvestiia vuzov. Chernaia metallurgiia [Izvestia. Ferrous Metallurgy]. 2010, no. 3, pp. 29–31.

[9] Shevakin Iu.F., Kolikov A.P., Raikov Iu.N. Proizvodstvo trub [The production of pipes]. Moscow, Intermet Inzhiniring publ., 2005. 568 p.

[10] Kolikov A.P., Romantsev B.A. Teoriia obrabotki metallov davleniem [The theory of processing of metals pressure]. Moscow, MISiS publ., 2015. 451 p.

[11] Poliakov R.N. Uvelichenie resursa tiazhelonagruzhennykh opor valkov prokatnykh stanov za schet sovmeshcheniia podshipnikov kacheniia i skol’zheniia [Reliability improvement of rotor supports by combining rolling-elements bearings and fluid-film bearings]. Fundamental’nye i prikladnye problemy tekhniki i tekhnologii [Fundamental and applied problems of technics and technology]. 2012, no. 5, pp. 59–66.

[12] Trojahn W. Walzlager aus hoher legirten Stahlen. HTM – Journal of Heat Treatment and Materials, 2010, vol. 65, pp. 225–229.

[13] Yoshitaka Inoue, Choji Hatsugai. Roll mill with automatic control of roll-to-roll distance and inter-roll pressure. Patent US, no. 8172166 B2, 2011.

[14] Shevakin Iu.F., Kolikov A.P., Raikov Iu.N. Mashiny i agregaty dlia proizvodstva stal’nykh trub [Machines and units for production of steel pipes]. Moscow, Intermet Inzhiniring publ., 2007. 388 p.