Roller outer diameter measuring system based on eddy current displacement sensor

Abstract

The invention discloses a roller outer diameter measuring system based on an eddy current displacement sensor and relates to the field of equipment utilizing the eddy current displacement sensor to measure roller outer diameter. The measuring system comprises a measuring head mounting base, a guide rail pair and the eddy current displacement sensor. The measuring head mounting base is mounted on a base of a roller. The guide rail pair is mounted on the measuring head mounting base. The eddy current displacement sensor is mounted on a moving part of the guide rail pair and perpendicular to a measuring face of the roller. The eddy current displacement sensor is used for non-contact measurement for the surface of the roller, so that the outer diameter of the roller can be measured in real time during seamless steel pipe rolling with the roller, dismounting of the roller is not needed, workload is relieved greatly, and precision loss during remounting of the roller can be avoided. In addition, preferably, the guide rail pair, a rack and a gear are used for realizing auto-positioning of the eddy current displacement sensor, trouble for manual positioning is saved, measuring precision is improved, and workload is relieved.

Description

technical field [0001] The invention relates to the field of equipment for measuring the outer diameter of a roll by an eddy current displacement sensor, in particular to a roll outer diameter measuring system based on an eddy current displacement sensor. Background technique [0002] With the continuous increase in the use of seamless steel pipes in petroleum, chemical, military, etc., the precision requirements for seamless steel pipe rolling are also getting higher and higher. Studies have shown that the main defects of seamless steel pipes include transverse damage, longitudinal damage and uneven thickness, etc. These defects are mainly caused by the decline in the accuracy of the roll surface with the increase in wear and deformation during the rolling process. Therefore, it is particularly important to monitor the rolling precision in the process of rolling and piercing in real time, and the detection of rolling precision is mainly done by measuring the outer diameter ...

AI Technical Summary

Problems solved by technology

[0005] However, the above five measurement methods have the following defects: method 1 is difficult to ensure the geometric conditions required for measurement, and cannot ensure that the measurement direction is strictly parallel to the axis line during multiple axial measurements, and cannot achieve dynamic measurement; method 2 Although it is possible to select a suitable saddle-type roll shape measuring instrument according to the size of the roll, the resulting problem is that the number of saddles required is large, and the operator needs to have high skills; the third method is mainly used to measure the roll The convexity, concavity, taper, ellipticity and other parameters of the roll shape, but the accuracy problems caused by manual operation and other reasons have not been effectively solved; although method 4 and method 5 are in the measurement accuracy of the outer diameter of the roll There has been great improvement, but the selection of sensors and the positioning of measuring instruments still cannot meet the requirements of high-precision measurement

Due to the large volume and mass of the roll, there are many problems in offline measurement: 1. It is inconvenient to disassemble, and the process of disassembly and reinstallation takes a lot of time; 2. The accuracy of reinstallation after measurement cannot be controlled; 3. Offline The measurement also needs to be placed in a special measuring frame, which will also affect the measurement accuracy; 4. Since the surface of the roll is easily stained with iron filings and other impurities during the rolling process, the contact measurement is easy to wear or damage the contact probe

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