Measuring rod calibration device and calibration method for calibrating outside micrometer

Abstract

The invention discloses a measuring rod calibration device and a measuring rod calibration method for calibrating an outside micrometer. The length of the measuring rod for calibration is indirectly computed by computing whole displacement of an electric actuator and displacement of an electric actuator push rod, wherein the displacement of the electric actuator can be measured by using a grating scale, and the displacement of the electric actuator push rod can be directly acquired as an output parameter of the electric actuator. Data processing is achieved by programming on an upper computer according to a verification regulation JJG21-2008. The method is mainly characterized in that the length of the measuring rod for calibrating the outside micrometer is indirectly computed by computing the whole displacement of the electric actuator and the displacement of the electric actuator push rod. The electric actuator can be voluntarily moved to a reasonable measurement range, so that the device can calibrate the measuring rod for measuring micrometers in any size, errors caused by precision fitting of measuring blocks when four equivalent measuring blocks are used for calibration by using a comparison method are avoided, and meanwhile calibration data can be analyzed and a calibration report can be provided in an upper computer.

Description

technical field [0001] The present invention relates to the field of micrometers, in particular to a calibration device for a measuring rod used for calibration of an outer micrometer and a method for calibrating a measuring rod for calibration of an outer micrometer. (Under specified conditions, use a reference standard to assign values ​​to the characteristics of measuring instruments including reference materials, and determine their dimensional deviation and variation). Background technique [0002] Micrometer, also known as screw micrometer, is one of the most frequently and widely used measuring tools in the industrial field. The micrometer is known for its precision measurement and is one of the tools for measuring length. Its measurement accuracy can be as accurate as 0.01mm (it is estimated to read one digit to 0.001mm, so it is called a micrometer). As a precision measurement tool, the micrometer will inevitably affect the measurement results if there is a problem...

AI Technical Summary

Problems solved by technology

The measuring range needs to be considered during the use of the length measuring machine. The length measuring machine is suitable for the length measurement with a range of more than 500mm. For the measurement of small lengths, the length measuring instrument is used instead, and its universality is greatly reduced.

The measurement of the comparison method largely depends on the size of the standard gauge block. When calibrating a large measuring rod, the size of the standard gauge block is not enough to reach the nominal size of the measuring rod, and the gauge block needs to be grinded together, which will Inevitably introduce errors, but also cause a certain loss to the gauge block

[0005] In summary, there are vacancies in the calibration of the measuring rod used for calibration of the outer micrometer within the full range and the improvement of the calibration method

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