Method and apparatus for monitoring and controlling tightening o

Details Method and apparatus for monitoring and controlling tightening o Method and apparatus for monitoring and controlling tightening o

1995-06-05

1997-01-07

Williams, Hezron E.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Threaded fastener stress

2940702, F16B 3102

Patent

active

055919197

ABSTRACT:
A fastener tensioning method wherein pre-tensioning fastener tightening history acquired during the tightening of the fastener prior to the point of proportional tensioning of the fastener is utilized to modify the tightening cycle occurring after the point of proportional fastener tensioning to reduce the resultant tension scatter while using a tightening perimeter such as torque as an indicator of fastener tension.

REFERENCES:
patent: 4013895 (1977-03-01), Akiyoshi et al.
patent: 4102182 (1978-07-01), Brown et al.
patent: 4106176 (1978-08-01), Rice et al.
patent: 4179786 (1979-12-01), Eshghy
patent: 4305471 (1981-12-01), Eshghy
patent: 4768388 (1988-09-01), Fader et al.
patent: 5404643 (1995-04-01), Rice

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