Gear cutting – milling – or planing – Planing – Process
Patent
1982-03-03
1984-07-17
Briggs, William R.
Gear cutting, milling, or planing
Planing
Process
51 48HE, 51291, 409132, 409168, 409307, 409314, B23D 700
Patent
active
044602979
ABSTRACT:
Cutting apparatus forms helical races in a workpiece defining a toroidal envelope having an axis of symmetry and a circular axis perpendicular to the axis of symmetry and defining a diametric plane through the envelope by rotating the workpiece about the axis of symmetry and continuously rotating a cutting tool about a second axis perpendicular to the axis of symmetry and coincident with the circular axis in synchronism with the workpiece rotation so as to form a series of helical grooves which extend all around the envelope. As the cutting tool is swung from the entrance end of each groove toward the diametric plane, the tool is rotated through a selected angle in one direction about its own longitudinal axis and, as the tool is swung from said diametric plane toward the exit end of each groove, it is rotated through said angle in the opposite direction about its said axis so as to produce a non-varying groove geometry when measured rectilinearly to the tangent of the lead angle of the groove. Provision is also made for increasing the distance between the tool cutting edge and the second axis when the tool is out of contact with the workpiece so as to increase the cut depths of the grooves.
REFERENCES:
patent: 2638136 (1953-05-01), Miller
patent: 3745712 (1973-07-01), Hajsman
patent: 3916569 (1975-11-01), Wydler et al.
patent: 4028992 (1977-06-01), Kuehnle
Briggs William R.
Meier Lawrence
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