Process for producing propellers

Details Process for producing propellers Process for producing propellers

1983-12-22

1985-12-03

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291568B, 291568P, 29557, 29DIG18, 29DIG26, 29DIG48, 228165, 416213R, 440 49, B21K 300, B23P 1500

Patent

active

045558353

ABSTRACT:
A method is provided for the fabrication of a steel propeller which is designed to have a final shape and size consistent with a conventional propeller design. The resultant formed propeller includes n individual blades, each having boss segments. When the boss segments of the individual blades are joined together they form a propeller having a center boss portion. A center aperture may thereupon be drilled or bored in the boss for mounting the propeller on the shaft of a marine engine. The propeller is formed, in accordance with the method of the present invention, by individually press-forging n steel blanks into individual blade portions which include boss segments. The press-forged blades are then ground with their lateral surfaces beveled to permit them to be welded together into a whole propeller. The center aperture is then formed and the propeller finally heat treated and finally ground.

REFERENCES:
patent: 1882164 (1932-10-01), Ross
patent: 2065154 (1936-12-01), Rayniak
patent: 2450493 (1948-10-01), Strub
patent: 4058880 (1977-11-01), Hughey

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