| 摘要 |
PURPOSE: An improved finishing block is provided in which roll stands can be selectively dummied to progressively increase product size, with the dummied stands being completely uncoupled from the mill drive, and with the mill drive arranged such that rolling speeds can be increased progressively to increase the tonnage rate of the larger products being rolled. CONSTITUTION: The multi-stand block for a rolling mill comprises a plurality of roll stands(16a to 16h) alternately arranged on opposite sides of a pass line along which a product is to be rolled in a downstream direction from and entry end to an exit end of the block; drive shafts on opposite sides of the pass line, each drive shaft including separate coaxial shaft segments interconnected by couplings; means for connecting each of the roll stands to a respective one of the shaft segments; and a single block drive means connected to the drive shafts at the entry end of the block, the couplings being selectively disconnectable to mechanically isolate any downstream shaft segments and the rolls stands connected thereto from the block drive means, wherein the roll stands(16a to 16h) have work rolls(18) arranged to roll the product in a twist-free manner, the work roll axes of successive roll stands are alternately offset by 90 degrees, the couplings comprise clutchable gear-type couplings(22a to 22h), the roll stands are connected to respective ones of the shaft segments by intermeshed pairs of bevel gears(24a to 24h), one bevel gear of each pair being carried on a shaft segment and the other bevel gear being carried on an intermediate shaft mechanically coupled to the work rolls of the respective roll stand, the block drive means comprises a multi-gear speed increaser(12) powered by a drive motor(14), and the drive motor is positioned to one side of the pass line.
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