Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1993-03-25
1994-07-05
Kisliuk, Bruce M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51287, 51 56G, 409 38, B23C 305
Patent
active
053256344
ABSTRACT:
The improved hourglass worm gear which has been produced by grinding a blank for the worm gear by rotating a grinding wheel about a grinding wheel shaft A while turning the grinding wheel shaft A about a tool shaft A3 which extends in parallel with a wheel shaft A2 perpendicular to a worm shaft A1 is characterized in that a cross-sectional shape of the grinding wheel taken in a plane inclusive of the grinding wheel shaft A exhibits a circular arc.
Since the cross-sectional shape of the grinding wheel for successively grinding a series of gear tooth surfaces on the hourglass worm gear is contoured in the form of a circular arc, the hourglass worm gear assures that a radius r of the circular arc has an increased degree of freedom and an ideal contact pattern can be obtained by properly adjusting the radius r.
A contour of each gear tooth shape having few variation of gear tooth engagement is determined by correctly adjusting the radius r of the circular arc as well as various conditions associated with correct generation of a series of gear tooth surfaces on the worm gear in order to assure the ideal contact pattern regardless of displacement of shafts as well as displacement of each gear tooth under a large magnitude of load.
REFERENCES:
patent: 2861502 (1958-11-01), Caubet
patent: 4998385 (1991-03-01), Umezono et al.
patent: 5018403 (1991-05-01), Umezono
An Investigation on Seconday Action on Skew Gears Feb. 1975, pp. 25-32.
Gunbara Hiroshi
Kawada Hiroshi
Kobayashi Tohru
Shimachi Shigeyuki
Sonohara Tsunetoshi
Kisliuk Bruce M.
Mitsubishi Jukogyo Kabushiki Kaisha
Morgan Eileen P.
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