Method and means for measuring wear in constant velocity joints

Details Method and means for measuring wear in constant velocity joints Method and means for measuring wear in constant velocity joints

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.

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