Ultrasonic bolt tensioner

Details Ultrasonic bolt tensioner Ultrasonic bolt tensioner

1983-05-04

1985-07-23

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

With testing or indicating

B23Q 1700

Patent

active

045301433

ABSTRACT:
In one form of the present invention, an apparatus for tightening a bolt stores information relating to an allowable relationship between change in bolt length and torque. A wrench applies a time changing torque to the bolt, the change in bolt length is measured by timing a traveling acoustic pulse in the bolt, and comparison means ascertains whether the torque-length behavior of the bolt exhibits the allowable relationship.

REFERENCES:
patent: 4142266 (1979-03-01), Dahl
patent: 4179786 (1979-12-01), Eshghy
patent: 4208775 (1980-06-01), McCombs et al.
patent: 4333220 (1982-06-01), Aspers
patent: 4344216 (1982-08-01), Finkelston
patent: 4375122 (1983-03-01), Sigmund

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