Abstract: To improve the productivity of the cold rolling facility by providing the cold rolling facility with a strip wiper free of dust and foreign matters suitable for high-speed rolling. The wiping ability was greatly improved by floating and supporting the wiper roll by the static pressure bearing of air of two-pocket type, and by variably adjusting the load range of the floating force in response to the plate width. At high-speed rolling exceeding 700 m/min which was incapable with the conventional roll wiper or tube wiper, the productivity of the cold rolling facility and the surface quality of the strip were greatly improved by applying to the cold rolling facility the wiping device whose wiping ability is equal to or better than the tube wiper at low speeds, and its effect is very large.

Abstract: To preferably roll a hard material or an ultra thin material by more reliably supporting small diameter work rolls even under a transient condition such as when starting a rolling operation or when finishing a rolling operation, undriven both ends support rolls 9, 10, 11 and 12 are provided on outer sides of a width along which a maximum sheet width of strip passes on a barrel portion of the work roll 3, to be opposed to each other at an entry side and a delivery side of respective end portions to thereby press and support the work roll. Further, hydrostatic bearings 21 and 23 are installed at central portions of both side barrels of the work roll 3, and fluid such as oil is supplied from fluid pressure supply ports 25 and 26 to the bearing portions to thereby float up the work rolls 3 by forming gaps between the hydrostatic bearings 21 and 23 and the work roll 3 and support the work roll 3 in horizontal direction in noncontact.

Abstract: There are provided a rolling machine and a rolling method in which the strip crown and shape control capability for a narrow-width strip is improved, so that the adequate strip crown and shape control capability for strips of various widths from a narrow width to a larger width can be secured. In the rolling machine, a pair of upper and lower working rolls are supported respectively by a pair of upper and lower intermediate rolls, and the intermediate rolls are supported respectively by a pair of upper and lower reinforcing rolls. The reinforcing rolls have an effective barrel length which is smaller than an effective barrel length of the working rolls and the intermediate rolls, and is larger than a width of a minimum-width strip to be rolled. The intermediate rolls are arranged in such a manner that their axes, disposed respectively in substantially horizontal planes, cross each other, and are crossed relative to the working rolls and the reinforcing rolls.