Apparatus for testing performance of clamp screw in elastic and

Details Apparatus for testing performance of clamp screw in elastic and Apparatus for testing performance of clamp screw in elastic and

1986-08-14

1988-01-19

Myracle, Jerry W.

Measuring and testing

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

By loading of specimen

73761, G01N 300

Patent

active

047198044

ABSTRACT:
An apparatus for testing performances of a screw consisting of a bolt and a nut in the plastic region under loading of an external force as well as in the elastic region. The apparatus comprises a load cell adapted for detecting thread torque, bearing torque, clamping torque and axial tension, nut tightening apparatus, apparatus for generating external force to be applied to the sample screw and an extensometer adapted for detecting twist angle and elongation of the bolt and revolution angle of the nut.

REFERENCES:
patent: 3354705 (1967-11-01), Dyer, Jr.
patent: 4554838 (1985-11-01), Paus

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