A coil splitting method for steel coil head and tail overlap in recoiling unit

Abstract

The invention provides a method for lapping and splitting the head and tail of a steel coil in a recoiling unit. According to the normal operation standard, the tail of the previous steel coil is rolled into the coiler, and the belt of the coiler is kept in a tight state; when the coiler stops When rotating, put the tail of the previous steel coil on the position from 12 o'clock to 2 o'clock on the clock dial; insert the head of the next steel coil between the tail of the previous steel coil and the coil body, to help roll The conveyor belt is kept in a tight state and starts to run; when the defective part of the lead of the next steel coil is completely involved in the previous steel coil, the unit will cut, divide and unload the coil. The invention can not only reduce one coil unloading operation process, shorten the time of coil splitting, and improve the operation rate of the recoiling unit; but also can reduce the cutting amount of the head and tail of the steel coil, and reduce the shear loss by 1 / 3, thereby greatly improving the yield of the cold-rolled plate rate and increase the economic benefits of the enterprise.

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 amount of removal 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 mills adopt the method of separately dividing the head and tail of each steel coil. Due to the consideration of loose coils...

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