Hot-rolled coiler pinch roll controlling method

Abstract

The invention relates to a hot-rolled coiler pinch roll controlling method. A pinch roll adopts position control or pressure control. The hot-rolled coiler pinch roll controlling method comprises the following steps that: step 1: before strip steel is gripped, the pinch roll adopts the position control; step 2: at the moment when a head part of the strip steel is gripped, the pinch roll adopts the pressure control; step 3: after the strip steel is wound on a wound roll and tension is formed, the pinch roll adopts the position control or the pressure control; and step 4: after the strip steel is tailed-out by a finishing front stander, the pinch roll adopts the pressure control. Due to adoption of the method, on the premise of the present precision control of roll-gap deviation at two sides of the pinch roll, the coiling quality of the tail part of a thin sheet can be improved, coiling flaws such as creasing, edge damage and surplus edge on the tail part of a steel coil can be reduced, damage on the surface of the pinch roll caused by the rolling cracking of the tail part of the strip steel can also be effectively reduced, the indentation flaw of the pinch roll can be reduced, and the high-strength steel wave-shaped flaw caused by the abrasion of the pinch roll can be improved.

Description

technical field

[0001] The invention relates to a control method, in particular to a control method of a pinch roll, especially a control method of a pinch roll applied to a coiler for hot rolling. Background technique

[0002] Coilers are used in many industries. Coilers are mechanical devices that roll products into rolls. In terms of complexity, coilers for steel plates in the metallurgical industry are typical. Coiler drive is from electricity, fluid, etc. The coiler generally consists of the core equipment reel (reel), auxiliary coiling equipment (auxiliary forming equipment) and so on. In the product coiling process, the product is mainly formed on the reel, and the reel is generally driven by a motor, and the auxiliary coiling equipment is generally driven by fluid to help roll smoothly.

[0003] Coilers are mainly used for coiling long rolled products into coils or coils. In a modern cold-rolled strip workshop, the coiler is also widely used in shearing, pickling...

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