Measuring and testing – Surface and cutting edge testing – Roughness
Patent
1995-06-06
1996-10-15
Williams, Hezron E.
Measuring and testing
Surface and cutting edge testing
Roughness
73 7, G01N 1908, G01N 356, B23Q 1720
Patent
active
055656234
ABSTRACT:
A computerized gauge for efficiently measuring surface profiles of tracks of constant velocity joints in order to detect defects in the surfaces when rebuilding CV joints. The race is mounted on a support adapted for movement along a translation axis, and a follower is biased into contact with the race along a deflection axis generally orthogonal to the translation axis. An interface ball on the follower, of a size compatible with the track when used in a CV joint, is caused to traverse the track from one end to another while a sequence of data points are recorded indicating the position of the center of the interface ball as it traverses the track. A regressive curve-fitting technique determines a best-fit curve to the set of data points, and a comparison between the data points and a best-fit curve identifies defects in the tested track.
REFERENCES:
patent: 3095730 (1963-07-01), Matheson
"Effect of Dimensional Factors on the Life of Rzeppa Universal Joint", SAE Transactions, Sec. 2, SAE Paper No. 850355, 1985, pp. 25-32.
Pankow Dale R.
Philpott Michael L.
Vandenberg Douglas
Welcher Brian P.
Aircraft Gear Corporation
Larkin Daniel S.
The Board of Trustees of the University of Illinois
Williams Hezron E.
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