Precise rolling work roll fracture handling method

Abstract

The invention relates to a precise rolling work roll fracture handling method. Corresponding handling methods of opening a sufficient distance between an upper work roll and a lower work roll through AGC fast opening and step pad zero setting, using a padded steel pipe for limiting the fracture roll deviation, adopting steel ropes for hanging lifting and the like are utilized for respectively handling thee kinds of roll fracture accidents such as the upper work roll fracture, the lower work roll fracture and the fracture of both the upper work roll and the lower work roll. The fracture roll can be taken out only through one hour, the time is saved by more than five hours through being compared with an ordinary handling method, the accident handling efficiency and the band steel yield can be improved, in addition, the secondary damage and scratch collision problems of the equipment can be avoided, and the work safety can be improved. The method is simple and practical, can be easily mastered, and has simple operation and wide popularization and application values.

Description

technical field [0001] The invention belongs to the field of steel rolling technology, and in particular relates to a method for dealing with broken work rolls in the finish rolling of a hot strip mill. Background technique [0002] In steel rolling production, especially hot-rolled strip production, roll breakage accidents are unavoidable, especially the breakage of finish rolling work rolls is particularly prominent. Therefore, how to safely and quickly take out the broken roll is a decisive issue to avoid the expansion of the accident, reduce the time for handling the accident, and reduce various losses. Since the characteristics of the equipment in each factory are not the same, the processing methods they adopt are also different. For large-scale hot-rolled strip steel production plants, after a roll-breaking accident occurs, the common method is to bind the broken pieces with steel ropes, and then pull the broken rolls out of the frame one by one by means of a crane a...

AI Technical Summary

Problems solved by technology

[0003] 1. The work efficiency is low. It usually takes more than 7-8 hours to process a pair of work rolls, which seriously affects the smooth progress of production;

[0004] 2. It is easy to cause secondary damage to the equipment, such as scratches on the surface of the backing roll, damage to the water cutting board and guides, or scratches on the string roll cylinder and distributor, etc.;

[0005]3. There are potential safety hazards. Operators need to enter the frame to work when binding broken parts, but the situation in the rolling mill in the state of broken rolls is more complicated and unpredictable happens often

In addition, the shape of the broken parts is irregular, and the steel rope is not tightly bound, which will cause accidents such as the steel rope popping up and hurting people or the broken parts falling off.

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