Method of making a one-piece piston for an internal-combustion e

Details Method of making a one-piece piston for an internal-combustion e Method of making a one-piece piston for an internal-combustion e

1986-01-24

1987-05-05

Rosenbaum, Mark

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29DIG18, 29DIG25, 72334, 72335, 72356, 92172, 92208, 123193P, B23P 1510, B21D 2800

Patent

active

046620478

ABSTRACT:
A one-piece piston is produced by die pressing in a single step, a previously forged blank to bend an annular cylindrical collar thereon and at the same time form a fire rib between two lugs which are pierced in the die-pressing tool so that eyes are formed in the lugs and the latter are calibrated by the piercing operation.

REFERENCES:
patent: 2465792 (1949-03-01), Davis
patent: 2539903 (1951-01-01), Gruetjen
patent: 2756876 (1956-07-01), Watson et al.
patent: 2795467 (1957-06-01), Colwell
patent: 3237532 (1966-03-01), Clark
patent: 3264717 (1966-08-01), Class et al.
patent: 3305918 (1967-02-01), Christen et al.
patent: 4532686 (1985-08-01), Berchem

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