Gear manufacturing method and gear manufactured thereby
OwnerKwang Hui Leeinventor
Life of this patent
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Abstract
A gear manufacturing method includes a step of preparing a gear blank; a step (teeth cutting step) of cutting the gear blank to form a half-finished gear having a plurality of gear teeth; a step (heat treatment step) of heat-treating the half-finished gear having the gear teeth; and a step (form rolling step) of rolling the half-finished gear which is subjected to the heat treatment, in which the gear teeth of the half-finished gear which is subjected to the teeth cutting step is formed with protuberances on both sides in a circumferential direction, and at the form rolling step, the protuberances are pressed by a rolling die, so that the half-finished gear becomes a gear.
Claims5
A gear manufacturing method consisting of:
- a step of preparing a gear blank;
- a step of teeth cutting by cutting the gear blank to form a half-finished gear (20) having a plurality of gear teeth (21);
- a step of heat treatment by heat-treating the half-finished gear having the plurality of gear teeth;
- and
- a step of form rolling by rolling the half-finished gear after the heat treatment,
- wherein, in the teeth cutting step, protuberances (28) are formed on both sides of each of the plurality of gear teeth in a circumferential direction,
- wherein, in the form rolling step, the protuberances (28) are pressed by a rolling die so that the half-finished gear becomes a gear,
- wherein each of the protuberances (28) has a maximum thickness at a portion corresponding to a pitch circle, and the thickness is gradually decreased toward an addendum circle and a dedendum circle,
- wherein the maximum thickness of each protuberance at the pitch circle ranges from 100 to 200 μm.
Dependencies are inferred from the claim text.