A device and method for changing rolls of a reversible rolling mill stand

Abstract

The invention relates to a replacement device for a reversible rolling mill stand roller. The replacement device comprises guide rails, a roller replacement trolley, a roller replacement platform anda novel device, wherein the roll replacement trolley is located on the guide rails, the roll replacement platform is fixed on the roll replacement trolley, the novel device is arranged on the roll replacement platform, the novel device is composed of a lifting table, a moving table and a driving device, wherein the lifting table is connected with a hydraulic cylinder a arranged on a frame type platform to control the lifting movement of the hydraulic cylinder a; the movable table is connected with the hydraulic cylinder b to form a movable structure, a telescopic device is arranged on the movable table, the telescopic device comprises a basic arm, a telescopic inner arm and a carrier roller device; symmetrical sliding guide rails and a hydraulic cylinder c are arranged on the inner side of the basic arm, and the telescopic inner arm is connected with the hydraulic cylinder c. According to the invention, safe, rapid and labor-saving overhaul operation is ensured, the problems of complicated process and unsafe hidden danger existing in the conventional replacement of the stand roller are solved, the operation time can be shortened, and the maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of steel rolling equipment, and relates to a device and method for replacing rolls of a reversible rolling mill stand. Background technique [0002] At present, the two-high reversible rolling mills of large iron and steel production enterprises, including the rough rolling mill of the bar and the plate rolling mill, are equipped with a rack roll device. The main purpose of the rack roll is to transport and output the rolled billet to the rolling mill. And support, its position is distributed on both sides of the main roll, and it is connected and fixed with the two archways of the rolling mill. The position is very limited, and there are many related auxiliary equipment. In addition, they also bear the high temperature of the rolled piece, impact load, and frequent positive and negative rotations. Therefore, the rolling mill rack rolls must be replaced and maintained regularly to maintain the normal operati...

AI Technical Summary

Problems solved by technology

[0002] At present, the two-high reversible rolling mills of large iron and steel production enterprises, including the rough rolling mill of the bar and the plate rolling mill, are equipped with a rack roll device. The main purpose of the rack roll is to transport and output the rolled billet to the rolling mill. And support, its position is distributed on both sides of the main roll, and it is connected and fixed with the two archways of the rolling mill. The position is very limited, and there are many related auxiliary equipment. In addition, it also bears the high temperature of the rolled piece, the impact load, and the frequent positive and negative working conditions. Therefore, the rolls of the rolling mill stand must be replaced and maintained regularly to maintain the normal operation of the entire rolling mill equipment.

[0003] Since the rack rolls are located in the archway of the rolling mill, the rack rolls cannot be taken out directly by driving. Under the existing technical conditions, the maintenance personnel have to remove other obstructive auxiliary equipment to expand the space when working on the actual site, and then use The gourd lifts the frame rollers slowly, moves them out of the archway little by little, and finally lifts them away with the crane, and repeats the above operation sequence when reinstalling the frame rollers. The process is very cumbersome, and replacing a set of frame rollers requires Several shifts consume a lot of manpower, the work intensity is high, and it is easy to cause safety accidents during the operation process. This replacement method can no longer meet the needs of high-paced production and maintenance costs.

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