The Calibration for Mass Torsion Machine and Investigation of Designing Torsion WrenchesZOU Guang-ping, QU Jia, WU Guo-hui College of Civil Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, ChinaAbstract:
The measuring components are usually shaped in the form of cylinder in former torsion wrenches. The calibration of torsion torque is determined by the measurement of shearing stress in the cylinder. However, the torsion stiffness is relatively low in cylinder materials. Thus, the measurement range for the contortion is somewhat narrow and is unfit for the measurement of mass torsion torque. With cantilever beam model, based on three different methods, namely, leverage theory, electronic strain measurement and flexibility measurement, a special design has been obtained for the case of torsion wrenches. Moreover, a simple device has been made for the purpose of calibration on torsion testing machine. The results obtained by the experiments are in high precision.[著者文摘]
Key words:
Metrology ; Torsion machine; Torsion wrenches; Calibration