Method for allowing hot rolled strip steel to pass through fault rolling mill without being rolled

Abstract

The invention provides a method for allowing hot rolled strip steel to pass through a fault rolling mill without being rolled. The method comprises the following steps of: assembling two waste working rolls and a bearing base to form a fault machine frame, and arranging the fault machine frame in the fault rolling mill according to a normal roll replacing process, wherein transmission sides of the two waste working rolls are not provided with flat heads, and torsion holes are drilled on roll heads on working sides of the two waste working rolls; after an upper working roll is lifted by 60 to 70 millimeters, closing a water sealing plate is closed, starting to roll and adding cooling water of the rolling mill; and allowing the strip steel to pass through the fault rolling mill without being rolled for a period of time, and rotating a lower working roll by utilizing a special torsion rod to change a contact position with the strip steel. By the method, any rolling mill can produce the strip steel while performing fault processing under the condition of faults on a strip steel production line, so that the actual rolling stop time due to the faults of a main transmission system is shortened effectively, and the quality of products is ensured while the operating rate and yield of the rolling mill are improved substantially.

Description

technical field [0001] The invention belongs to the technical field of steel rolling technology, and in particular relates to a method for strip steel passing through a faulty rolling mill based on fault maintenance of a single-stand rolling mill of a hot-rolled strip steel production line. Background technique [0002] The composition of the main drive system of the hot-rolled strip finishing mill is that the electric motor transmits the rolling torque through the main coupling, the primary cylindrical gear reducer, the intermediate gear reducer, the gear stand or herringbone gear, and the transmission shaft. to the work roll. If any part of the above-mentioned main drive system fails, it will be very time-consuming and laborious to replace, and will seriously affect the normal production of hot-rolled strip. Moreover, each finishing mill is driven by a high-power AC motor, and each motor has many control units, which requires high working environment. Due to the high pri...

AI Technical Summary

Problems solved by technology

When the rolling mill is empty, because the roll itself does not rotate, the wear of the roll is very severe under the friction of the high-speed running strip steel, and a large amount of iron filings and oxides stick to the surface of the roll. Steel surface, pressed into the strip surface during subsequent rolling, affecting surface quality

Coupled with the baking effect of hot strip steel, cracks appear on the surface of the roll, causing huge damage to the roll, which directly affects the continued use of the roll

Images