Method of tightening threaded member

Details Method of tightening threaded member Method of tightening threaded member

B - Operations, Transporting

25

B

B25B 21/00 (2006.01) B25B 23/14 (2006.01) B25B 23/147 (2006.01) B25B 28/00 (2006.01)

Patent

CA 2125082

ABSTRACT OF THE DISCLOSURE A reference range of tightening torques is predetermined relative to the rotation angle of a threaded member as tightened up normally. In tighten- ing up a nut on an externally threaded member, the tightening torque is detected by a torque sensor every time the nut is rotated through a specified angle, and whether the tightening torque relative to the rotation angle is within the reference range is judged by a microcomputer. The result of judgment is indicated by a light-emitting diode and a buzzer.

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