Process and control method for eliminating winding of thin hot-rolled strip steel on pinch roll of coiling machine

Abstract

The invention discloses a process for eliminating winding of thin hot-rolled strip steel on a pinch roll of a coiling machine. The process comprises the following steps: a, heating a steel billet in a heating furnace; b, primary descaling is conducted, specifically, the heated steel billet enters a descaling procedure I to remove oxide scale formed on the surface of the steel billet; c, the descaled steel billets enter a side press, and the width of the steel belt is preliminarily controlled; d, the steel billets enter a rough rolling unit to be roughly rolled, secondary descaling is conducted, and then the steel billets enter a finishing rolling unit to be rolled; and e, the rolled strip steel is guided by a pinch roll of the coiling machine to enter a mandrel of the coiling machine to be coiled after being subjected to laminar cooling. The invention further provides a control method for eliminating winding of the thin hot-rolled strip steel on the pinch roll of the coiling machine, the temperature of the head of the strip steel passing through the pinch roll is controlled according to different coiling temperatures of the strip steel, and the sticking probability of the strip steel and the pinch roll is reduced by compensating the temperature of the head.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled steel strips, and in particular relates to a process and a control method for eliminating pinch rolls of thin-gauge hot-rolled strip winding coilers. Background technique [0002] In the normal hot rolling production process, after the slab leaves the heating furnace, it is rolled into strip steel by the rough rolling unit and the seven-stand finishing unit. Rolls are transported to the transportation line by the unloading trolley and then enter the finished product warehouse. The strip steel is wound on the pinch roll, which means that the strip steel fails to enter the coiler shaft through the pinch roll guide, but is wound on the pinch roll. After Masteel 1580 hot rolling was put into production, with the substantial increase in low-carbon and thin-gauge output, there were 15 times in 2018 that the strip steel was wound on the pinch roll, and the pinch roll needed to be replaced after the s...

AI Technical Summary

Problems solved by technology

After Masteel 1580 hot rolling was put into production, with the substantial increase in low-carbon and thin-gauge output, there were 15 times in 2018 that the strip steel was wound on the pinch roll, and the pinch roll needed to be replaced after the strip steel was wound on the pinch roll. Caused a vicious accident and seriously affected the production stability

[0003] At present, when the hot-rolled strip is guided by the coiling pinch roll, one is to increase the eccentricity of the upper and lower pinch rolls to improve the turning ability; the other is to increase the pinch roll turning ability by reducing the pre-swing roll gap of the pinch roll , but it is more likely to cause the strip steel to stick to the pinch roll; the third is that hot-rolled thick-head rolling increases the thickness of the strip head and reduces the possibility of strip steel sticking to the pinch roll. Starting from the mechanism of the feeding roller, it cannot completely solve the occurrence of pinch roller winding accidents

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