METHOD OF CONTROLLING TIGHTENING QUALITY IN ASSEMBLING THREADED JOINTS BY IMPACT NUT RUNNER, AND DEVICE TO THIS END Russian patent published in 2009 - IPC B25B21/02 B25B23/14 

Abstract RU 2360786 C2

FIELD: mechanics.

SUBSTANCE: in compliance with this invention, the minimum and maximum tolerable number of impact-rotary pulses forming the strikes tolerance margin that provides for a high-quality tightening of threaded joints. The aforesaid margin is compared with the total number of the impact-rotary pulses made by the nut runner in tightening till preset torque of the nut runner spindle whereat the nut runner is switched off. Previously mentioned total number of the said pulses, fitting in or out of the said margin, indicates either high-quality or poor tightening.

EFFECT: higher quality of control.

2 cl, 1 dwg

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RU 2 360 786 C2

Authors

Ustinov Vitalij Valentinovich

Dates

2009-07-10Published

2007-09-12Filed