A treatment method for broken rolls of finish rolling work rolls

Abstract

The invention relates to a treatment method for broken rolls in finish rolling. Through AGC quick opening and step pad zero adjustment, the upper and lower work rolls can be opened to a sufficient distance, and steel pipes with pads are used to limit the deviation of broken rolls and steel ropes to hang and lift. According to the treatment method, three kinds of broken roll accidents, namely upper work roll breakage, lower work roll breakage and upper work roll breakage, are dealt with respectively. It takes only 1 hour to take out the broken roll, which saves more than 5 hours compared with the ordinary treatment method, improves the accident treatment efficiency and strip steel output, and can prevent secondary damage and scratching problems of equipment, and improve work safety. The method is simple and practical, easy to grasp and operate, and has universal popularization and application value.

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

The main problems with this approach are:

[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 stringer cylinder and distribution device, 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.

Images