Development of a Portable Torque Wrench Tester

4th International Conference on Advanced Engineering and Technology

Wang, Y.^1 ; Zhang, Q.^1 ; Gou, C.^1 ; Su, D.^1

Metrology Testing Center, China Academy of Engineering Physics, No.64, Mianshan Road, Mianyang

621900, China^1

关键词: Automatic loading;    Coverage factors;    Hand torque;    On-site calibration;    Torque standards;    Torque wrenches;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/317/1/012031/pdf
DOI  :  10.1088/1757-899X/317/1/012031

来源: IOP

【 摘 要 】

A portable torque wrench tester (PTWT) with calibration range from 0.5 Nm to 60 Nm has been developed and evaluated for periodic or on-site calibration of setting type torque wrenches, indicating type torque wrenches and hand torque screwdrivers. The PTWT is easy to carry with weight about 10 kg, simple and efficient operation and energy saving with an automatic loading and calibrating system. The relative expanded uncertainty of torque realized by the PTWT was estimated to be 0.8%, with the coverage factor k=2. A comparison experiment has been done between the PTWT and a reference torque standard at our laboratory. The consistency between these two devices under the claimed uncertainties was verified.