Measuring method of rolling pressure in rolling mill

Abstract

The invention discloses a method for measuring the rolling pressure of a rolling mill, comprising: setting a rolling force measuring device of the rolling mill, including an upper pressure equalizing plate for lower pressure measurement, a lower pressure sensor, and a lower equalizing plate for lower pressure measurement sequentially arranged under the lower support roll, and The pressure measuring head, hydraulic cylinder, upper pressure measuring and lower pressure equalizing plate, upper pressure sensor and upper pressure measuring and upper pressure equalizing plate are sequentially arranged above the upper support roller; the pressure measured by the upper pressure sensor is the working side pressure F w1 , transmission side pressure F d1 , the working side hydraulic cylinder pressure is M w , the transmission side hydraulic cylinder pressure is M d , the pressure measured by the pressure sensor at the position of the lower support roller is the working side pressure F w2 , transmission side pressure F d2 . Through the present invention, the rolling force of the rolling mill can be calibrated to obtain a more realistic rolling force, which can be used as a basis for plate thickness adjustment, has a beneficial effect on effectively improving the functional accuracy of the rolling mill, and has popularization and application value.

Description

technical field [0001] The invention relates to a pressure measuring method, in particular to a rolling mill rolling pressure measuring method, and belongs to the technical field of hot rolling mill pressure measurement. Background technique [0002] For rolling mills, especially hot rolling mills, the rolling pressure is the key factor to control the thickness of the rolling mill. In the actual production process, the rolling pressure is provided by the hydraulic cylinder on the top of the rolling mill. Pressure measurement generally adopts the method that the oil pressure of the hydraulic cylinder is equal to the pressing pressure of the rolling mill. However, the oil pressure of the hydraulic cylinder of the rolling mill is not equal to the rolling force of the rolling mill. The main reasons are the internal leakage of the hydraulic oil, the variable stiffness characteristics of the hydraulic cylinder, and the gap and friction between the vertical interfaces of the rollin...

AI Technical Summary

Problems solved by technology

However, the oil pressure of the hydraulic cylinder of the rolling mill is not equal to the rolling force of the rolling mill. The main reasons are the internal leakage of the hydraulic oil, the variable stiffness characteristics of the hydraulic cylinder, and the gap and friction between the vertical interfaces of the rolling mill roll system. The accuracy of the rolling force measurement Directly affects the control accuracy of the rolled plate thickness

Therefore, during use, the oil pressure of the hydraulic cylinder is generally different from the actual rolling pressure, and the deviation value does not have a quantitative index

[0003] In addition, the pressure difference in the same direction is usually used to determine whether the pressure measurement is accurate, that is, a pressure sensor (pressure measuring head) is installed at the lower part of the work roll under the rolling mill. During the production process, the pressure obtained at the two places is measured at the same time. If the value is large, it is judged that the actual measurement accuracy is not good, and the equipment needs to be repaired

However, there is a problem of insufficient precision in this judgment method.

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