GB1421629A - Apparatus for dismantling and assembling roll assemblies of a rolling mill - Google Patents

Abstract

1421629 Rolling mills WEAN UNITED Inc 13 March 1973 [24 April 1972] 11959/73 Heading B3M Apparatus for dismantling a bearing chock mounted on the journal of a rolling mill roll includes saddles for supporting the body of the roll, and a support assembly which can engage the chock and is movable horizontally to, remove the chock axially from the roll. A roll assembly 16, Fig. 2, includes a roll body 16b supported on saddles 13, bearing chocks 16d on the roll journals, and further end chocks 16e which are used for controlled bending of the roll when located in a mill stand. A work roll, having driving couplings instead of the end chocks, may replace the backing roll shown. Extractor cars 11 and 12 are axially aligned with the roll and are movable along rails 35 and 35a. Each car has an elevator 47 which is used for removing a bearing chock 16d, and a sled 61 for removing an end chock 16e The roll is supported on a wheeled carriage 10 which is movable normal to the rails 35 and 35a. The carriage 10, Fig. 3, has a further pair of saddles 15 for supporting a replacement roll 17. When the chocks have been removed from the roll 16, the carriage is movable such that the roll 17 is in alignment with the cars 11 and 12, and the chocks can be re-located on the replacement roll. The roll 16 is initially lifted on to the carriage 10 by a crane, lugs 16g on the bearing chocks being used to support the roll during lifting. The cars 11 and 12 are moved towards the roll ends, and the sleds 61, Fig. 4, are raised into engagement with the end chocks 16e. Withdrawal of each sled by a ram 64 slides the chock from the roll journal. Each elevator 47, which includes a V-shaped frame 44 for embracing a bearing chock 16d, is raised until the chock is supported, and the cars are then retracted to remove the chocks. The frame 44 is so shaped that it can accommodate the chock from either a working or back-up roll. Similarly, the sled is so arranged that it can be used for removing a drive coupling or an end chock from a roll. If the chocks and/or drive couplings are to be fitted to a replacement roll, the new roll is aligned with the cars 11 and 12 and the procedure reversed.