| 摘要 |
In order to provide a two-part housing assembly for a cluster mill which has substantially the same size, form and structure as a monobloc housing, but which is divided into two parts for ease of use and maintenance, the housing assembly is divided along a horizontal plane located at or close to the centre line into upper and lower mill housings (11 and 12) each provided with a roll cavity (110, 111) and roll cluster therein. The gap between the work rolls of the roll clusters is adjusted by symmetrical, equal and opposite movement of the upper and lower mill housings (11 and 12) achieved by four identical screws (15) one located in each corner of the mill housing assembly. Each screw (13) has two threaded portions (14 and 15) of opposite hand, one threaded portion engaging a threaded nut (17) of opposite hand non-rotatably mounted in a recess (46) in the upper mill housing (11) and the other threaded screw portion (14) engaging a threaded nut (16) of appropriate hand non-rotatably mounted in a recess (47) in the lower mill housing (12). Each screw (13) supports the upper and lower mill housings (11 and 12). A jack (31) is provided in the mill base to support and rotate the screw (13). The upper and lower mill housings (11 and 12) are adjustably prestressed together, at a spacing determined by the screws, by a pair of tie rods (23) affixed to the piston (25) by a hydraulic cylinder located at each corner of the upper mill housing. <MATH> |
