Device and method for measuring thickness of lubricating oil film on high-speed rolling interface

Abstract

The invention discloses a device and method for measuring the thickness of a lubricating oil film on a high-speed rolling interface. The measuring device comprises a dynamic roll center distance measuring device, a sheet thickness measuring device, a data processing module and a display device. The dynamic roll center distance measuring device can accurately measure the distance between the roll center of an upper working roll and the roll center of a lower working roll, and the sheet thickness measuring device can measure the variations in horizontal thickness and vertical thickness of a sheet. After being obtained, the distance between the roll center of the upper working roll and the roll center of the lower working roll and the thickness of the sheet are processed by the data processing module, and then the variations in thickness of the lubricating oil film on the rolling interface are obtained. The measuring device can measure the thickness of the lubricating oil film on the high-speed rolling interface, is simple in structure and convenient to maintain, and eliminates the influences of vertical vibration of a rolling mill on the measurement result, furthermore, the elastic flattening of the working roll and the thickness difference of cross sections of the sheet are also taken into consideration, so that the result is more accurate.

Description

technical field [0001] The invention belongs to the technical field of rolling testing, and relates to a device and method for measuring the thickness of a lubricating oil film on a high-speed rolling interface. Background technique [0002] In order to reduce the rolling load and the temperature of the rolled piece, lubricated rolling is generally used in production, and the lubricated condition is an important factor affecting the vibration of the rolling mill. Because vibration caused by poor lubrication between the roll and the strip is very common in iron and steel enterprises, the research on the lubrication characteristics of the rolling interface is a current research hotspot. [0003] Oil film thickness is a main indicator of lubrication conditions. Oil film thickness determines the friction and lubrication state between the roll and the rolled piece. Poor lubrication will make the friction between the roll and the strip in an unstable state, resulting in tension fl...

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Problems solved by technology

At present, the technical methods for measuring oil film thickness at home and abroad mainly include: resistance method, capacitance method, optical interference method, eddy current method, X-ray method, laser diffraction method, optical displacement sensor method, ultrasonic resonance method, etc., but most of these methods only It is suitable for the measurement of the bearing or static oil film thickness, but not suitable for the measurement of the oil film thickness of the rolling interface under high-speed working conditions, and the thickness of the lubricating oil film at the rolling interface is greatly affected by the vertical vibration of the rolling mill. Thickness measurement has not been well resolved

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