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US 4,920,703 AGranted
Method and apparatus for finishing a tooth surface of a gear
AssigneeKoganei Seiki Seisakusho
InventorNorio Hosoya
Life of this patent
Estimating the term…
Abstract
A workpiece and master gears are engaged each other and at least one of the workpiece and master gears is relatively rocked in a manner such that the relative rock movement of the master gear does not interfere substantially beyond an involute line of the gear tooth surface of the workpiece gear.
Claims23
A method of finishing an involute gear tooth surface of a workpiece gear, comprising the steps of:
- engaging said workpiece gear with a master gear having involute gear tooth surfaces in a meshing fashion for cooperatively rotating said workpiece gear with said master gear so that contacting involute gear tooth surfaces of said workpiece and master gears contact through at least one contact point, said contact point shifting along said contacting involute gear tooth surfaces as said workpiece and master gears rotate;
- and
- simultaneously causing at least one of said gears to rock with respect to the other along a tooth profile direction extending between a tooth root and a tooth top of a contacting gear tooth of said workpiece gear in a manner such that the relative rocking motion between said contacting involute gear surfaces at any position of said shifting contact point is along said tooth profile direction and is always substantially tangent with respect to said involute gear tooth surface of said workpiece at said shifting contact point and said shifting contact point does not interfere, at any position thereof, substantially beyond an involute curve, and into the body, of said contacting involute gear tooth surface of said workpiece gear.
An apparatus for finishing an involute gear tooth surface of a workpiece gear, comprising:
- a rotatable workpiece gear having involute gear tooth surfaces;
- a first supporting means for supporting said workpiece gear;
- a rotatable master gear having involute gear tooth surfaces and engaging with said rotatable workpiece gear in a meshing fashion through at least one contact point between contacting involute gear tooth surfaces of said workpiece and master gears, said contact point shifting along said contacting involute gear tooth surfaces as said workpiece and master gear rotate;
- a second support means for supporting said master gear;
- a driving means for rotating at least one of said workpiece and master gears;
- a rotation control means for controlling the rotation of at least one of said workpiece and master gears;
- and
- a rocking motion generating means for relatively rocking said workpiece and master gears substantially along a tooth profile direction extending between a tooth root and a tooth top of a contacting gear tooth of said workpiece gear in a manner such that said relative rocking motion between said contacting involute gear tooth surfaces at any position of said shifting contact point is along said tooth profile direction and is always substantially tangent with respect to said contacting involute tooth surface of said workpiece at said shifting contact point and said shifting contact point does not interfere, at any position thereof, substantially beyond an involute curve, and into the body, of said contacting involute gear tooth surface of said workpiece gear.
5 more elements
Dependencies are inferred from the claim text.