Cambering of Four High Cold Mill with the View of Reducing Roller Ends Contact and Preventing Complex Waves

Zhenhua Bai, Hongxin Si, Xiaodong Shi, Qingtian Zhou

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DOI: 10.4236/eng.2011.34040                

Abstract

Based on lots of field experiments and theoretical research, fully thinking the equipment and production craft characters of four high cold mill, a new cambering scheme for four high cold mill is advanced in this paper. This scheme considered the need of production of multi-specification products, as well as the control of roller ends contact. The most homogeneous transverse distribution of front tension is the control target and the homogeneous pressure distribution between rollers is the constraint condition. In this technology, working roll curve adapt the combination of cosine curve and high order curve, backup roll adapt the combination of cosine curve, straight line and high order curve. The cosine subentry of working roll and the high order curve subentry are used to control edge wave, the high order curve subentry of working roll is used to control the roll contact, the cosine subentry of backup roll is used to reduce the center wave. That’s the features of this technology. On-site testing shows that the new cambering and combination can not only manage the complex waves of normal four high cold mill effectively, but also will reduce the contact between roller ends and minish roll consumption. This technology has created economic benefits for enterprises.

Keywords

Complex Waves, Strip Shape, Roll Contour, Roll Contact, Roll Consumption

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Z. H. Bai, X. Z. Feng and Y. F. Jiang, “Research on Reform Program of Roll Shape in Skin Rolling Process of Super Thin Strip,” China Mechanical Engineering, Vol. 18, No. 23, 2007, pp. 2887-2890.
[2]	Z. H. Bai, “A Method for Roll Configura-tion Curve in the Temper Rolling Process of Thin and Narrow Strip,” Patent for an Invention, China, Patent Number: CN2006100 12600.5
[3]	T. Q. Gu, Z. H. Bai and Y. S. Zhao, “A Method for Roll Configuration Curve in Hot Dip Galvaniz-ing Temper Mill,” Patent for an Invention, China, Patent Number: CN200510029216.1.
[4]	Z. H. Bai, T. Q. Gu, A. M. Wu and J. C. Lian, Research on Technology about Roll Shape of 1800 3# CGL Hot Galvanizing Temper Mill in Baosteel. China Mechanical Engineering, Vol. 17, No. 1, 2006, pp. 33-35.
[5]	Z. H. Bai, J. C. Lian, F. Liu and J. Q. Wang, “Re-search of the Roll Crown Optimization on Skin Pass Mill in Baosteel 2050 Hot Rolling Plant,” Steel, Vol. 37, No. 9, 2002, pp. 35-38.
[6]	Z. H. Bai, “Research of Theory and Engineering Use about Roll Crown of 1450 Hot Rolling Temper Mill,” Metallurgical Equipment, Vol. 23, No. 2, 2006, pp. 4-6.
[7]	C. Q. Huang and J. C. Lian, “A Back-Up Roll Con-figuration Curve Which Cooperate with the Working Roll Con-figuration Curve of Continuous Variable Crown Mill,” Patent for an Invention, China, Patent Number: CN 200510024680.1
[8]	J. C. Lian and X. D. Qi, “A Back-Up Roll Configuration Curve Which is Fit for the Working Roll with Axial Movement Device to Change Roll Gap Crown,” Patent for an Invention, China, Patent Number: CN200410008 195.0
[9]	J. C. Lian, “A Variable Gap’s Roll Shape Which is Fit for the Working Roll with Axial Movement Device to Change Roll Gap Crown,” Patent for an Invention, China, Patent Number: CN95117449.5
[10]	H. D. Huang, X. L. Chen and A. R. He, “A Working Roll Configuration Curve Which Takes Account of Both Shape Control and Schedule Free Rolling,” Patent for an Invention, China, Patent Number: CN200510046113.6.