Method of making an internal wave generator for strain wave...

B - Operations – Transporting – 23 – P

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B23P 15/14 (2006.01) F16H 49/00 (2006.01)

Patent

CA 1283776

ABSTRACT METHOD OF MAKING AN INTERNAL WAVE GENERATOR FOR STRAIN WAVE GEARING A method of making an elliptoidal internal journal type wave generator for use with a flexspline, the latter having internal spline teeth, an outer diameter (O.D.) designated two times the radius (R), and a radial deflection (d) for spline meshing at minor axis localities with diametrically opposed spline teeth of at least one rigid circular spline, the method comprising: a. providing a circular wave generator ring with a radially inner wall diameter (I.D.) equal to twice R plus three times d, and a ring thickness 1.3 to 1.4 times the inner wall I.D.; b. opening the ring by forming only one gap at least eight times d in circumferential dimension; c. radially reducing the ring portion diametrically opposite to the gap to enhance radial flexibility of the ring while still enabling it to maintain its I.D. dimension; d. compressing the ring along an axis perpendicular to a median through the gap and the reduced portion to circumferentially decrease the gap until permanent deformation occurs establishing a minor axis dimension in the ring corresponding to loose meshing of the spline teeth; and e. further closing the gap to selectively decrease the minor axis dimension to enable the ring to preload the spline teeth.

527695

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