Process for producing rocker arm for internal combustion engine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0354024
(1994-12-06)
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발명자
/ 주소 |
- Fujiwara Akira (Wako JPX) Yamada Noriyuki (Wako JPX) Yakubo Kazushige (Wako JPX)
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출원인 / 주소 |
- Honda Giken Kogyo Kabushiki Kaisha (Tokyo JPX 03)
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인용정보 |
피인용 횟수 :
2 인용 특허 :
5 |
초록
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In producing a rocker arm, following steps are used: fabricating a rocker arm blank which includes: a rocker arm body having an aperture therein adapted to be converted to a hole for the insertion of a shaft, and which blank is made of a nitrided steel comprising specified amounts of C, Mn, Cr, Al,
In producing a rocker arm, following steps are used: fabricating a rocker arm blank which includes: a rocker arm body having an aperture therein adapted to be converted to a hole for the insertion of a shaft, and which blank is made of a nitrided steel comprising specified amounts of C, Mn, Cr, Al, Si, P, S, Cu, Ni, one of Pb and Bi, and optionally Mo, and, as the balance substantially, Fe; and a slipper surface forming piece; subjecting the rocker arm blank to a refining treatment to adjust its hardness; subjecting the apertures to reaming to form the shaft insertion holes; and subjecting the rocker arm blank with the shaft insertion holes formed therein to a nitriding treatment. Thus, it is possible to mass-produce rocker arms for an internal combustion engine, each of which has excellent mechanical properties.
대표청구항
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A process for producing a rocker arm for an internal combustion engine comprising the steps of: fabricating a rocker arm blank which has an aperture adapted to be converted into a shaft insertion hole which is made of steel comprising: 0.3% (inclusive) to 0.5% (inclusive) by weight of carbon (C), 0.
A process for producing a rocker arm for an internal combustion engine comprising the steps of: fabricating a rocker arm blank which has an aperture adapted to be converted into a shaft insertion hole which is made of steel comprising: 0.3% (inclusive) to 0.5% (inclusive) by weight of carbon (C), 0.3% (inclusive) to 1.5% (inclusive) by weight of manganese (Mn), 0.9% (inclusive) to 1.5% (inclusive) by weight of chromium (Cr), 0.7% (inclusive) to 1.5% (inclusive) by weight of aluminum (Al), 0.35% by weight or less of silicon (Si), 0.03% by weight or less of phosphorus (P), 0.03% by weight or less of sulfur (S), 0.3% by weight or less of copper (Cu), 0.25% by weight or less of nickel (Ni), at least one member of the group consisting of 0.04% (inclusive) to 0.15% (inclusive) by weight of lead (Pb), and 0.03% (inclusive) to 0.1% (inclusive) by weight of bismuth (Bi), and the balance substantially of iron, with the normal impurities; refining said rocker arm blank by: hardening at a treating temperature (T1) of 850°(inclusive) to 950°C. (inclusive) for a treating time (t1) of 0.5 (inclusive) to 2 (inclusive) hours; reaming said aperture an amount sufficient to form said shaft insertion hole; and nitriding said reamed rocker arm blank at a treating temperature (T3) of 550°(inclusive) to 610°C.(inclusive) for a treating time (t3) of 5 (inclusive) to 8 (inclusive) hours.
이 특허에 인용된 특허 (5)
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Mills Jesse V. (Toledo OH), Low-friction, boat-type rocker arm.
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Sato Masakazu (Tochigi JPX) Koike Seiichi (Saitama JPX) Oikawa Toshihiro (Tochigi JPX) Ban Keisuke (Tochigi JPX), Method for producing a rocker arm for use in an internal combustion engine.
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Anderson Anthony T. (Romulus MI) Field Nathaniel L. (Northville MI), Method of making low friction finger follower rocker arms.
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Wherry Joseph L. (Perrysburg OH) Patel Ramanlal L. (Maumee OH), Rocker arm and method of making same.
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Mills Jesse V. (Toledo OH), Rocker arm of the cam-follower type with ribs.
이 특허를 인용한 특허 (2)
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Horrie Gerald A. ; Myers John E., Engine injector structure and hard thread milling method and apparatus for forming same.
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Mori Akiyoshi,JPX ; Kanzaki Tatsuo,JPX, Method of manufacturing a tappet.
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