Steel coil head-tail lap-joint and coil-separating method for re-coiling unit

Abstract

The invention provides a steel coil head-tail lap-joint and coil-separating method for a re-coiling unit. The steel coil head-tail lap-joint and coil-separating method comprises the following steps: coiling a tape tail of the last steel coil into a coiling machine according to normal operation standards, and keeping a belt of a coiling assisting machine tight; when the coiling machine stops rotation, putting the tape tail of last steel coil to a position from 12 o 'clock to 2 o 'clock of a clock dial plate; inserting a tape head of a next steel coil into a position between the tape tail and a coil body of the last steel coil, keeping the belt of the coiling assisting machine tight, and starting operating; after the defect part of the tape head of the next steel coil is completely coiled into the last steel coil, carrying out shearing, coil-separating and coil-unloading by the unit. According to the steel coil head-tail lap-joint and coil-separating method, one coil-unloading operation process can be reduced, coil-separating time can be shortened, and operation efficiency of the re-coiling unit is improved; and moreover, head-tail cut-off amount of steel coils can be reduced, and shearing loss is reduced by 1 / 3, so that the yield of cold-rolled sheets is greatly increased, and economic benefits of enterprises are improved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling technology, and in particular relates to a head-to-tail lapping and splitting method for steel coils of a cold rolling recoiling unit. Background technique [0002] The recoiling unit is an important process in the cold rolling production line, and its main functions include trimming, oiling, quality inspection and coil splitting. For each steel coil, there will be more or less serious defects at the head and tail, and these defects need to be completely removed in the recoiling unit. Therefore, strictly controlling the removal amount is an important task of the recoiling unit. [0003] Because in the production process of the recoiling unit, it is necessary to cut off the defective parts at the head and tail of the steel coil. At present, most domestic cold-rolling factories adopt the method of separately dividing the head and tail of each steel coil. Due to the consideration of loose coil...

AI Technical Summary

Problems solved by technology

At present, most domestic cold rolling mills adopt the method of separately dividing the head and tail of each steel coil. Due to the consideration of loose coils, the head and tail need to be rolled at least 8 times respectively. The total length of the head and the tail is 30 meters. Not only reduces the operating rate of the unit, but also increases the amount of head and tail removal, which directly reduces the yield