Method of Speed Mode Correction of Rolling Pipes in the Reduction Mill

Abstract:

The article develops one of the main directions of improving the technology of pipe rolling on a reduction-stretching mill, in order to reduce the end crop. The article describes a speed adjustment technique of the reduction mill, when rolling the front end and back end of pipes, the length of which corresponds to the length of the thickness of ends of the finished pipe. A distinctive feature of the technique is the calculation of volume of the thickness end, which must be reduced by an adjusted value, when rolling the end area in the head stands. The sequence of technological calculations and the results of industrial testing of pipe reduction by standard rolling modes, and modes calculated by the proposed technique, are given. An analysis of the results of industrial testing showed the possibility of reducing the mass of the thickness ends by no less than 7%.

• Periodical: Solid State Phenomena (Volume 299)
• Pages: 594-599
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.299.594
• Online since: January 2020
• Authors: Grigory A. Orlov, E.A. Kungurov*
• Keywords: End Wall Thickness Deviation, Hot-Rolled Pipes, Reduction-Stretching Mill, Thickness Ends

References

[1] V.N. Danchenko, A.V. Chus, Longitudinal rolling of pipes, Metallurgy, Moscow, (1984).

[2] G.I. Gulyaev, The technology of continuous tubeless rolling of pipes, Metallurgy, Moscow, (1975).

[3] L.S. Zeldovich, V.A. Ivobotenko, V.F. Klestov, etc, Thinning of pipe ends on a continuous mill, Steel, 6 (1979) 437-441.

[4] E.N. Panyushkin, V.N. Danchenko, S.V. Kondratyev et al., Development of methods for calculating the technological parameters and modes of operation of the system of preliminary thinning of the end sections of the black-out, pipes in a continuous TPA 30–102 mill, Modern Problems of metallurgy, Dnepropetrovsk, 11 (2008) 155-162.

[5] G.A. Orlov, S.E. Ashkanov, A.G. Orlov, Analysis of the end difference wall pipe after the reduction mill, Proceedings of universities. Ferrous metallurgy, 3 (2017) 250-251.

DOI: 10.17073/0368-0797-2017-3-250-251

[6] G.A. Orlov, S.V. Lipnyagov, V.L. Ustyantsev, A.I. Pugin, S.E. Ashkanov, Simulation of formation of thickened tube ends during rolling in a reduction mill, Steel, 9 (2016) 40-44.

[7] G.A. Orlov, V.A. Gagarinov, A.Yu. Bodrov, V.L. Ustyantsev, S.E. Ashkanov, Investigation of the pipe end difference after pipe rolling unit with a continuous mill, Steel, 8 (2016) 55-57.

[8] A.V. Vydrin, E.V. Khramkov, M.V. Bunyashin, The energy balance of the process of rolling oil pipe assortment on the reduction mill, Metallurg, 1 (2016) 21-25.

[9] Fu-jie Wang, Yu-an-hua Shuang, Jian-hua Hu, Qing-hua Wang, Explorative study of tandem skew rolling process for producing seamless steel tubes, Journal of Materials Processing Technology, 214 (2014) 1597-1604.

DOI: 10.1016/j.jmatprotec.2014.03.002

[10] Pehle Hans Joachim. Method for minimizing thickened ends during the rolling of pipes in a stretch reducing mill, Pat. US6526792 (B1). Classification: B21B17/14; B21B37/18; B21B37/78 (2003).

[11] B.Y. Sun, S.J. Yuan, Computer Simulation System of Stretch Re-ducing Mill, Acta Metallyrgica Sinica (English Letters), 20(6) (2007) 457-462.

DOI: 10.1016/s1006-7191(08)60010-1

[12] H. Neumann, E. Stef-fen, P. Tiven, Increasing the degree of use of the reduction-stretching tube rolling mill by optimizing the use of rolls, Black metals, 8 (2013).

[13] V.V. Shirokov, A.V. Vydrin, A.V. Nikitin, V.V. Ananyan, A.V. Niklyaev, Improving the method of calculating the speed of continuous rolling of pipes, Ferrous metals, 8 (2016).

[14] G.A. Orlov, A.G. Orlov, Qualimetry Rating of Hot-Rolled Pipes, Solid State Phenomena, 284 (2018) 1349-1354.

DOI: 10.4028/www.scientific.net/ssp.284.1349

[15] G.А. Orlov, Yu.N. Loginov, A.G. Orlov, Comprehensive quality assessment of hot rolled steel pipes, Black metals, 4 (2018) 41-45.

[16] Pele Hans Joachim Method of operating a reduction-stretching rolling mill and a reduction-stretching rolling mill, Pat. 2300433 (Russia). MKI B21B 17/14, B21B 37/78 (2007).

[17] V.S. Zarudny, V.V. Larikov, I.I. Kazakevich, et al., Method of tube rolling on a reduction-stretching mill, Pat. 2532610 (Russia). MKI B 21 V 17/00 (2014).

[18] G.I. Gulyaev, I.N. Erokhin, Yu.G. Gulyaev, O.I. Lev, Method of multistand rolling, A.S. 1338909 USSR. MKI V21V 17/14 (1987).

[19] A.V. Vydrin, V.I. Kuznetsov, E.V. Khramkov, M.V. Bunyashin, The method of continuous rolling and continuous multistand mill for its implementation, Patent 2614974 Russia. MKI B21B 17/14 (2017).

[20] A.I. Kozlovsky, Yu.G. Gulyaev, E.I. Shifrin, et al. Method of pipe rolling in a multi-meter reduction mill, Pat. UA 77136 (Ukraine). MKI B 21 V 17/00 (2006).