Verification and calibration device and method for torque wrench verification instrument

Abstract

The invention discloses a verification and calibration device and method for a torque wrench verification instrument. The device comprises a mechanical structure and a control system. The mechanical structure comprises a combined support, the upper portion of the combined support is provided with a reference platform and an instrument bracket, the reference platform is provided with a lever supporting seat and a leveling mechanism, the lever supporting seat is provided with a verification lever, the two ends of the verification lever are symmetrically provided with weighing hooks used for containing force value weights, and a lever limiting mechanism is arranged below the verification lever. An electric control box and a control box are arranged on the combined support. The control systemcomprises a controller and a power module, the input end of the controller is connected with a key module and a sensor module, and the output end of the controller is connected with an indicator lamp.The device is simple in structure, reasonable in design, capable of being effectively applied to verification and calibration of the torque wrench verification instrument, easy to operate, capable ofeffectively improving the accuracy of verification and calibration in combination with a verification and calibration method, good in use effect and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of measuring instrument calibration, and in particular relates to a calibration device and method for a torque wrench calibrator. Background technique [0002] The promulgation and implementation of the torque wrench tester in my country's metrology verification regulations cancels the torque standard machine verification method, retains the verification lever and force value weight method, and adds the standard torque wrench method. According to the requirements of the new verification regulations, many existing verification and calibration devices for torque wrench verification instruments cannot meet the requirements. Due to the difficulty in manufacturing standard torque wrench, high cost, and high purchase price, and it is suitable for on-site verification and calibration of torque wrench calibrator, most of them use the verification lever and force value weight method as the measurement standard to tes...

AI Technical Summary

Problems solved by technology

[0003]The torque wrench tester includes a torque sensor part and an instrument part. In the existing test lever and force weight method, the test device of the torque wrench tester mostly uses a test lever It is directly connected to the output end of the torque sensor. When loading, due to the action of gravity, the sensor will produce a small bending moment deformation, which will affect the accuracy of the verification result; in addition, the existing device does not have a leveling mechanism, and the force is applied on the hook tray of the verification lever. After the weight is loaded, the verification lever will rotate and offset downwards along the center of the sensor (that is, the center of the verification lever) to the loading direction, so that the verification lever deviates from the horizontal position, resulting in the vertical distance from the center of the sensor to the load direction (that is, the effective force arm ) changes, thus affecting the accuracy of the test results

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