A kind of control method of pinch roll gap

Abstract

A method for controlling the gap between pinch rolls, comprising: (1) classifying strip thickness grades and material silicon content grades; (2) collecting strip material characteristic data; (3) establishing low grade, medium grade, and high grade respectively. According to the statistical table of silicon content data of brand materials, the historical actual performance value and historical setting value of the gap between the upper and lower pinch rollers corresponding to the strip thickness grade and material silicon content grade are obtained; (4) the strip enters the unit, according to the strip (5) According to the statistical table of material silicon content grade data, determine the control coefficient K of the strip spacing this time; (6) Calculate the final setting of the upper and lower pinch roller gap spacing Fixed value G, G=T*K, G is the final set value of pinch roller gap spacing, T is the set value of strip thickness. According to the invention, the precision control is accurate, and the expandability and adaptability are strong, so that the steel strip head can be normally pinched and threaded, avoiding defects, and the strip steel yield is high.

Description

technical field [0001] The invention relates to a method for controlling the roll gap of pinch rolls, in particular to a method for controlling the roll gap of pinch rolls used in conjunction with disc shears in a finishing unit for producing electrical steel products. Background technique [0002] The disc shears of the finishing unit are important equipment to ensure that the edge of the strip is cut neatly, and the pinch rollers that match it behind the disc shears are one of the key equipment that determines whether the disc shears can start shearing smoothly. [0003] figure 1 is a schematic diagram of the edge of strip sheared by disc shearing. In order to ensure that the disc shears can start to cut the strip smoothly, generally a pinch roller should be placed behind the disc shears to clamp the head of the strip and send it to the coiler or tensioning / braking device smoothly. and build some tension. The force of the pinch rollers to pinch the strip should not be t...

AI Technical Summary

Problems solved by technology

[0008] There are two key defects in the existing control method: First, the accuracy control is not accurate: the main performance is that the setting of the pinch roller gap is irregular and can be checked, which is an empirical value, and the operator often manually adjusts the pinch roller gap set value

The second is that the expansion is not strong and the adaptability is poor: the main performance is that the setting value of the pinch roller gap is determined according to the thickness specification of the strip. When the material properties of the strip change, especially for electrical steel products, the silicon content from 0.10% to 3.5% fluctuation, the strength and surface properties of materials with different silicon content are very different. If you still use the pinch roller gap setting value corresponding to the thickness of the specification, it will cause the belt head to fail to pinch and wear normally. There are many defects in the strip head, and the strip yield is low

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