Method for controlling roll gap of pinch roll

Abstract

The invention discloses a method for controlling a roll gap of a pinch roll. The method includes the steps of (1) grading strip steel thicknesses and material silicon content; (2) collecting strip steel material characteristic data; (3) respectively building low-grade, medium-grade and high-grade material silicon content data statistical tables, and obtaining historical actual performance values and historical set values, corresponding to the strip steel thickness grades and the material silicon content grades, of the roll gap between an upper clamping roll body and a lower clamping roll body; (4) enabling strip steel to enter a unit, and determining the strip steel thickness set value T according to the strip steel thickness grades; (5) determining a gap control coefficient K of the strip steel according to the material silicon content grade data statistical tables; (6) calculating the finial set value G of the roll gap between the upper clamping roll body and the lower clamping roll body, wherein the G is the product of the T and the K and is the finial set value of the roll gap of the clamping roll, and the T is the strip steel thickness set value. The method is accurate in accuracy control and high in expansibility and adaptability, a steel strip head can be normally clamped and conveyed and can normally penetrate through the clamping roll, defects are avoided, 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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