Design of calibration device for electric and pneumatic torque wrench with dual bearing
In view of the shortcomings of the existing electric and pneumatic torque wrench calibration devices,such as low measurement accuracy and easy to produce side force influence,a calibration de-vice for electric and pneumatic torque wrench with dual bearing structure is designed.The device includes the hardware part of the dual bearing support structure and the digital visualization operation software part.Based on the simplified model of simulated bolt,the double bearing structure is designed to offset the influence of lateral force.To ensure the strength requirements of the key components of the whole de-vice,the measurement accuracy can reach 0.01 Nm,and the maximum allowable error is±1％.Through the test of common electric torque wrench,it is verified that the calibrating device has good practicability and reliability,and its metrological performance and function meet the requirements of cali-bration work.It is of great significance for the traceability of dynamic torque.
dynamic torquemechanical metrologycalibration deviceelectric and pneumatic torque wrenchdual bearing
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