Tandem mill system and work roll crossing mill

Details Tandem mill system and work roll crossing mill Tandem mill system and work roll crossing mill

1996-09-10

1997-08-19

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72234, 72236, 722414, B21B 122, B21B 2706

Patent

active

056576552

ABSTRACT:
In a tandem mill system, at least one first type rolling mill is arranged in the upstream side and at least one second type rolling mill is arranged in the downstream side. The first type rolling mill is of the so-called work roll crossing mill in which a pair of work rolls are inclined with respect to a pair of back-up rolls supporting the work rolls and simultaneously crossed each other in a horizontal plane to control transverse thickness distribution of a strip. The second type rolling mill is of the so-called HC mill which controls the strip crown and shape by a combination of axial movement of intermediate rolls and work roll bending. Such an arrangement makes it possible to increase a capability of controlling the strip crown and shape, particularly, a capability of correcting the quarter buckle, and eliminate a fear of causing scratches on the strip and roll surfaces, with the result of improved production efficiency. Plural lines of lubricant supply device are also provided to stop supply of a lubricant immediately before biting of the strip into the work roll crossing mill and start the supply again after the biting. A system of lubricating the work roll crossing mill is thereby improved.

REFERENCES:
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Kapnin, Vladimir Victorovich, "Development of Main Technological Parameters of Strip Rolling Process in Crossed Rolls of Four-High Stand", Ministry of Higher and Secondary Education, Moskowsky Ordena Oktaybrskoy Revolutsii i Ordena Trudovogo Krasnogo Znameni Institut Staly i Splavov, pp. 16-21 and translation, 1987.
V.N. Khloponin, V.V. Kapnin, "Investigation Into The Methods For Adjustment of A Strip Lateral Section in A Four-High Mill Stand", Proceedings of Higher Educational Institutions, Ferrous Metallurgy, No. 7, 1986, pp. 82 -85 and translation.
V.V. Kapnin, V.N. Khloponin, "On Determining Contact Pressure inRolling with Crossed Working Rolls", p. 149 and translation, 1986.
European Search Report, The Hague, completed May 6, 1993.
Abstracts of Japan, JP 4,004,916, Method For Supplying Coolant For Lubricating and Cooling in Cold Rolling, (Oct. 04 1992.
Y. Miyai, Iron and Steel Engineer, Modernization and Operation of NKK's Keihin Hot Strip Mill, vol. 68, No. 11, (1991).
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Specification of Pending U.S. Application Serial No. 07/859,945.

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