METHOD FOR MEASUREMENT OF TORSION TORQUE OF THREADED JOINT TIGHTENING AND TORQUE SPANNER FOR ITS REALISATION Russian patent published in 2009 - IPC G01L5/24 

FIELD: physics, measurement.

SUBSTANCE: invention is related to measurement equipment and may be used for monitoring of torsion torque of threaded joint tightening. Method consists in application of torsion torque to tightened threaded joint, change over of threaded joint from state of rest to state of motion, rotation by a certain angle, which does not exceed 2÷4° and measurement of torsion torque, when rotation angle reaches specified value. Besides additional turn is carried out by the same angle with measurement of torsion torque, when rotation angle reaches specified value, and torsion torque of tightening is identified as difference of doubled value of torsion torque at initial rotation by specified angle and value of torsion torque in case of additional rotation by specified angle. Device comprises torque metre connected to inlet of amplifier, outlet of which is connected to inlet of analog-digital transducer, the first and second memory register, pulse counter, decoder, calculation unit, digital indicator and element "OR".

EFFECT: higher accuracy of tightening torsion torque monitoring.

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