Rolling mill rolling pressure measuring method

Abstract

The invention discloses a rolling mill rolling pressure measuring method. The method comprises the following steps that a rolling mill rolling force measuring device is arranged, the device comprises a lower pressure measuring upper pressure equalizing plate, a lower pressure sensor and a lower pressure measuring lower pressure equalizing plate which are sequentially arranged below a lower support roller, and the device further comprises a pressure measuring pressure head, a hydraulic cylinder, an upper pressure measuring lower pressure equalizing plate, an upper pressure sensor and an upper pressure measuring upper pressure equalizing plate which are sequentially arranged above an upper support roller; and pressure measured by the upper pressure sensor is working side pressure Fw1, transmission side pressure Fd1, working side hydraulic cylinder pressure Mw, transmission side hydraulic cylinder pressure Md, and pressure measured by the pressure sensor at the position of the lower support roller is working side pressure Fw2 and transmission side pressure Fd2. By means of the method, the rolling mill rolling force can be corrected, the real rolling force is obtained and serves as a basis for plate thickness adjustment, the beneficial effect is achieved for effectively improving the functional precision of a rolling mill, and application and popularization value is achieved.

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.

Images