Rack roller overhauling fixture for rough mill

Abstract

The invention discloses a rack roller overhauling fixture for a rough mill. The rack roller overhauling fixture comprises a trolley, a roller replacement hook, a roller replacement rail mechanism, a translational trolley, a lifting device and the like. When the fixture is used for overhauling, a rack roller is wholly disassembled and lifted; a rail of the roller replacement rail mechanism is erected below a rack roller mounting position; the translational trolley is pushed to a position right under the rack roller; the rack roller is lowered onto the translational trolley, is pulled out to a position above the translational trolley along the roller replacement rail mechanism, and then rotates a certain angle after being lifted by the lifting device; and the trolley can be pulled out of a mill house by a roller replacement trolley of the rough mill for overhauling and replacement. The rack roller of the rough mill can be disassembled and listed, and the disassembly and lifting processes are convenient and fast; and the rack roller is disassembled and conveyed to the outside for overhauling, so that overhauling speed is increased, and labor intensity is reduced. Therefore, by the fixture, the continuity, high efficiency, stability and direct motion of hot rolling production can be ensured; the high efficiency, sequence and high quality of the overhauling are ensured; and the online overhauling time of the rack roller is shortened.

Description

technical field [0001] The invention relates to a rough rolling mill stand roll, in particular to a rough rolling mill stand roll maintenance tool. Background technique [0002] In the rolling mill, the roughing mill is the equipment used to roll the continuous cast slab to the required thickness of the intermediate slab. The stand rolls of the roughing mill are installed at the entrance and exit of the roughing mill, one for each to assist the work of the rolling mill. When working, together with the front and rear working roller tables of the rolling mill, the steel billet is sent into the gap between the upper and lower working rolls that rotate relatively for rolling. Due to the harsh working environment of the rack rolls, long-term work in the environment of high temperature of about 1100°C and high-pressure dephosphorization water of 16MPa, the high temperature and water vapor erosion can easily lead to damage to the rack rolls, especially the bearings. At the same t...

AI Technical Summary

Problems solved by technology

The rack rolls are assembled in the rough rolling mill archway, and the on-site inspection space is relatively narrow, and the largest inspection space is only about 680mm

Therefore, on-site maintenance is inconvenient, which will lead to a long maintenance shutdown time and affect production

At the same time, the irregular shape of the guide mechanism also causes the hoisting device (referring to the guide on the roughing mill) to only lift the dismantled rack rolls together with the guide mechanism to a short height, and cannot be directly lifted away from the site for maintenance; Therefore, the method of replacing first and then overhauling cannot be adopted.

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