An Advanced Method for Determining Wrap Angle of Shape Roll in Cold Rolling Mill

Abstract

The invention relates to an advanced method for determining the wrap angle of a flat roll in a cold rolling mill, which is to calculate the front angle of the flat roll by using parameters such as the horizontal / vertical distance between the rolling mill and the flat roll and the actual pressing (or pressing) amount of the rolling mill. Wrap angle value, use the incremental encoder of the plate shape roller and the coiler to calculate the coiling diameter value of the coiling machine, average and linearize the calculated coiling diameter value, and pass the coiling machine and the plate shape The parameters such as the horizontal / vertical distance of the roll and the coiling diameter of the coiler are used to calculate the back wrap angle value of the shape roll. The method of the invention realizes the real-time calculation of the wrapping angle of the flat rolls by using less electrical equipment, improves the calculation accuracy of the wrapping angles of the strip steel and the flat rolls, and solves the problems caused by excessive calculation errors of the flat roll wrapping angles in the production process. Detect distortion problems, and ultimately achieve the purpose of improving the quality of shape control.

Description

technical field [0001] The invention relates to the field of electric control, in particular to a method for determining the wrap angle of a flat roll of a cold rolling mill. Background technique [0002] At present, advanced cold rolling mills are generally equipped with flatness detection equipment for on-line measurement of flatness in order to improve the flatness control effect of strip products. The contact type shape meter is the most widely used shape testing equipment in the cold rolling production line at present. It consists of a shape roller equipped with several pressure sensor devices and a shape control system. The flat roll is installed under the strip at the exit of the cold rolling mill, and is tightly wrapped by the strip during production. The radial pressure of the strip on different parts of the sensor is detected in real time. According to the internal tensile stress of the strip and the strip against the flat roll The physical relationship between th...

AI Technical Summary

Problems solved by technology

This patent only considers the effect of the change of the coiling diameter of the coiler on the wrap angle of the flat roll, but ignores the influence of the change of the rolling line of the rolling mill on the wrap angle of the flat roll. Using this patent to calculate the accuracy of the wrap angle of the flat roll Difficult to guarantee; the calculation of the coil diameter of this patented technology depends on the laser speedometer, and with the development of rolling mill control technology, coupled with the consideration of reducing investment costs, more and more cold rolling mills do not The laser velocimeter is then configured, so this patented technology cannot be implemented for these rolling mill production lines; this patented technology periodically calculates the coiling diameter, and the calculated value will show intermittent jumps, and the change of the wrap angle of the flat roll calculated by using this value is also will be discontinuous, which will eventually lead to a reduction in the accuracy of the flatness measurement

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