Metal treatment – Process of modifying or maintaining internal physical... – Carburizing or nitriding using externally supplied carbon or...
Patent
1996-07-25
1998-02-17
Echols, P. W.
Metal treatment
Process of modifying or maintaining internal physical...
Carburizing or nitriding using externally supplied carbon or...
148226, 72364, 2989334, 2989336, C23C 820, C23C 830, B21D 3100
Patent
active
057187746
ABSTRACT:
A method of producing a bevel gear is provided. The method comprises the steps of forging, from a case hardened and heated blank, a rough shaped bevel gear intermediate product having a toothed portion, outer burrs at a larger diameter end thereof and between adjacent teeth of the toothed portion, and a ring-shaped inner burr in a center hole thereof, setting the rough shaped bevel gear intermediate product in a trimming die during the time the rough shaped bevel gear intermediate product remains in an elevated temperature condition due to heat left therein after the step of forging, and trimming the outer burrs, and moving, after the step of trimming, the rough shaped bevel gear intermediate product from the trimming die to a sizing die in the vicinity of the trimming die and warm sizing the toothed portion in succession to the step of trimming.
REFERENCES:
patent: 3398444 (1968-08-01), Nemy
Fushimi Shinji
Kojima Mitugu
Matsumoto Takashi
Okawachi Kiyosi
Tukamoto Tetuo
Echols P. W.
Nissan Motor Co,. Ltd.
Nittan Valve Co., Ltd.
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