Piston shaping

Details Piston shaping Piston shaping

1983-07-08

1985-05-07

Larson, Lowell A.

Metal deforming

Process

Tube making or reshaping

291565R, B23P 1510

Patent

active

045150036

ABSTRACT:
A method of shaping the gudgeon pin bores formed in gudgeon pin bosses of pistons comprises introducing into the bores portions of a pin-shaped tool before the insertion of the gudgeon pin. A load is applied to the pin-shaped tool and the direction of the load and the shape of the pin-shaped tool are chosen so that areas of bore-defining walls of the bosses subjected to high stresses by the gudgeon pin in use, and therefore liable to crack, are radially outwardly deformed to reduce the incidence of cracks.

REFERENCES:
patent: Re26764 (1970-01-01), Packard et al.
patent: 1360558 (1920-11-01), Mattsson
patent: 1722389 (1929-07-01), Opie
patent: 2043103 (1936-06-01), Shoemaker
patent: 2652620 (1953-09-01), Sutowski
patent: 2703264 (1955-03-01), Pitner
patent: 2851319 (1958-09-01), Pitner
patent: 3129966 (1964-04-01), Blank
patent: 3161185 (1964-12-01), Justinien et al.
patent: 4189932 (1980-02-01), Fielder

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