Gear-shaping grindstone and method of fabricating the same
AssigneeDenso Corporation
InventorsToshiya Hayashi, Hisatoshi Kojima, Kazuki Kataoka, Toru Nakanoboh
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Abstract
A highly accurate, long-life grindstone for shaping a gear and a method of fabricating the grindstone, without depending on the accuracy of form of a base metal and without using a special grinding machine or a special lapping machine, are disclosed. A super-abrasive layer (29) of a predetermined thickness is fixedly attached on the outer periphery of a body portion (24) of the base metal (23) formed in a cylinder solid. The super-abrasive layer (29) is metal-bonded, and has the outer periphery thereof formed with a toothed portion (31) in the shape of the teeth of an external gear by electric discharge machining.
Claims7
A grindstone for shaping a gear, wherein at least the outer layer portion of the toothed portion is configured of a metal-bonded super-abrasive layer.
A method of fabricating a gear-shaped grindstone for shaping a gear, wherein at least the outer layer portion of the tool portion is configured of a super-abrasive layer, said method comprising the steps of:
- fixedly attaching a metal-bond material making up at least the outer layer portion of said toothed portion to a base metal;
- and
- forming the profile of said outer layer portion by electric discharge machining.
Dependencies are inferred from the claim text.