Control Method for Eliminating Pinch Roller of Hot Rolled Thin Strip Winding Coiler

Abstract

The invention discloses a control method for eliminating an accident of winding of hot-rolled thin strip steel to a pinch roll of a winding machine, and solves the problem that existing hot-rolled thin strip steel is easily wound on a pinch roll. The invention adopts the technical scheme as follows: the control method comprises the following steps: when conveying the strip steel with the thickness of not more than 2.0 mm to a winding drum through the pinch roll, controlling the temperature of the head of the strip steel passing through the pinch roll and setting the length of the head of the strip steel according to different tensile strength of the strip steel. Equipment do not need to be transformed in an implementation process of the method; by the method, the accident of winding of the hot-rolled thin strip steel to the pinch roll can be eliminated; the method has the advantages of simplicity, convenience and feasibility, simplicity for implementation, good safety and high practicality.

Description

technical field [0001] The invention relates to a strip steel production process, in particular to a control method for eliminating pinch rolls of a hot-rolled thin strip winding coiler. Background technique [0002] Normal production process: After the steel strip is rolled out from the rolling mill, it is cooled by laminar flow, and then it is clamped by the upper and lower pinch rollers and sent to the drum for transportation. Unloaded, transported by the transport chain to the steel coil storage area for stacking. Strip wound pinch rolls, see figure 1 , refers to a vicious production accident in which the strip is directly wound on the pinch roller after entering the pinch roller, and is not wound on the reel of the coiler. According to statistics, the number of incidents of strip winding pinch roll accidents in the CSP branch of Wuhan Iron and Steel Co., Ltd. is about 25 times a year. It is easy to be adsorbed on the surface of the pinch roll, and it will stick to th...

AI Technical Summary

Problems solved by technology

According to statistics, the number of incidents of strip winding pinch roll accidents in the CSP branch of Wuhan Iron and Steel Co., Ltd. is about 25 times a year. It is easy to be adsorbed on the surface of the pinch roll, and it will stick to the pinch roll, which will cause a vicious production accident on the pinch roll when the strip is wound.

[0003] At present, the method of controlling the thin strip in the hot rolling production line is to increase the relative distance (mutual offset) between the upper and lower pinch rolls. Accidents with pinch rollers

[0004] After studying the strip steel wound around the pinch roll, it was found that there are two problems: Problem 1: When producing thin strip steel, in order to ensure that the head of the thin strip steel runs smoothly on the roller table and prevent the head from turning over the scrap steel, the strip The 1-3m of the steel head is not cooled, which causes the temperature of the head to be too high. The strip steel at the high temperature part is soft, and it is easy to stick to the pinch roll surface during the process of being clamped by the pinch roll.

Problem 2: The thickness of the strip steel wrapped around the pinch roller is generally h≤2.0mm, and the strip steel is relatively thin. In addition, there is a water film formed by cooling water on the surface of the pinch roller. The water film and the strip steel are prone to adhesion, resulting in the strip steel winding and pinching roll

[0005] Therefore, in the case that the strip steel and the pinch rolls are prone to sticking, simply adjusting the offset of the upper and lower pinch rolls cannot effectively eliminate the occurrence of the strip steel winding around the pinch rolls. Therefore, the solution to the above technical problems is Those skilled in the art need to actively study the direction

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