METHOD OF MEASURING TORQUE THREADED JOINT TIGHTENING AND DYNAMOMETRIC KEY FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G01L5/24 

FIELD: measuring equipment.

SUBSTANCE: method consists in applying torque to the tightened threaded connection, transferring the threaded connection from a resting state to a driving state, turning the specified angle not exceeding 2÷4°, and measuring the torque, when the rotation angle of the set value is reached, an additional rotation by the predetermined angle with the torque measurement, when the set value angle is reached and the tightening torque is determined. The additional rotation angle may differ from the original rotation angle, and the tightening torque is determined by the relationship of the torque, the moment at the original angle rotation, the moment at the additional angle rotation, the initial rotation angle and the additional rotation angle. The device includes a torque sensor connected to the input of the amplifier, an output connected to the input of the analog-to-digital converter, the first and the second memory registers, a rotation angle sensor, a pulse counter, a calculation unit, a digital indicator. It is also equipped with the first and the second digital comparators, the third and the fourth memory registers and two NO elements.

EFFECT: expanding the manufacturing capabilities.

2 cl, 3 dwg