Metal working – Method of mechanical manufacture – Impeller making
Patent
1989-12-26
1991-05-14
Schwartz, Larry I.
Metal working
Method of mechanical manufacture
Impeller making
409131, 409199, 83 53, 219 6917, 2041291, B21K 304
Patent
active
050144219
ABSTRACT:
A blade having a concavely shaped leading edge is cut. The blade has first and second side faces, a tip profile and a root profile. Each profile has a first and second profile side corresponding with the first and second side faces. The cutter is positioned between the first root profile side and the first tip profile side. The tip profile and root profile are followed with two cutter portions of the cutter along the first root and tip profile sides toward the leading edge to cut the first side face. One of the cutter portions is translated around to the second profile side before the other cutter portion is translated to the second profile side, causing the formation of the concave leading edge. The tip and root profile is followed with the cutter, along the second profile side away from the leading edge to cut the second side face.
REFERENCES:
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patent: 2633776 (1953-04-01), Schenk
patent: 3295190 (1967-01-01), Parsons
patent: 4467166 (1984-08-01), Gamo et al.
patent: 4518842 (1985-05-01), Obara
patent: 4644124 (1987-02-01), Hori et al.
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patent: 4852232 (1989-08-01), Wells
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NASA Tech. Briefs, p. 71, Nov. 1989.
NREC Newsletter, Fall 1989, vol. 3, Issue No. 2.
NREC Newsletter, Winter 1990, vol. 4, Issue No. 1.
Manufacturing Engineering Article, Frank Hines, pp. 88 and 89, May 1989.
Griffith John M.
Jansen W.
Swarden M. C.
Foster Glenn B.
Ingersoll-Rand Company
Schultz R.
Schwartz Larry I.
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