| 摘要 |
A roller assembly for use as a back-up roller for work rolls. The roller assembly comprises an axle, a roller rotatably mounted on the axle, a plurality of bearing elements rotatably positioned between the axle and roller, at least one bushing which is eccentric relative to the axle and which is fixedly mounted on the axle by a dowel which passes through holes in the axle and eccentric bushing, and a housing for the bushing. The eccentric bushing is rotatable for translating the roller in a radial direction thereof. In order to rotate the bushing in one of opposite circumferential directions, force is applied to a respective one of a pair of terminal ends of grooving, preferably a single groove, which extends circumferentially in a radially outer surface of the eccentric bushing and which is adapted to allow unimpeded movement of adjustment screws in apertures in the housing to adjustably engage the grooving terminal ends thereby to maximize roller translation effected by the apertures and screws and positions of the terminal ends. The eccentric bushing passages (and/or the axle passages) through which the dowel passes are oblong to allow each bushing to independently move circumferentially relative to the other bushing within the limits of the oblong passages, to enable compensation for slight misalignment between the work roll and the back-up roller for the purpose of achieving near perfect contact.
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