Method of producing nozzle for solenoid valve

Details Method of producing nozzle for solenoid valve Method of producing nozzle for solenoid valve

1991-11-25

1993-08-31

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29890122, 29890142, 2491141, B21K 120, B23P 1300

Patent

active

052397513

ABSTRACT:
A method of producing a cylindrical nozzle incorporated in a fuel injection valve for an internal combustion engine including the steps of: setting a cylindrical nozzle blank on a second die so that a lower bottom face of the cylindrical nozzle blank rests on the second die; pressing a punch into the cylindrical nozzle blank while being guided along the inner wall face of the cylindrical nozzle blank; pressing the punch onto a bottom of the cylindrical nozzle blank to induce plastic flow, thereby transfer forming a seat portion at a center on the upper bottom face of the cylindrical nozzle blank; removing a projection formed on the lower bottom face of the cylindrical nozzle blank due to the plastic flow; boring a nozzle injection hole at the center of the transfer formed seat portion of the projection removed cylindrical nozzle blank; and hardening the bored cylindrical nozzle blank.

REFERENCES:
patent: 2029508 (1936-02-01), Scrimgeour
patent: 2618989 (1952-11-01), Cupler, II
patent: 3141358 (1964-07-01), Burke, Jr. et al.
patent: 4425777 (1984-01-01), Jaglinski
patent: 4479505 (1984-10-01), Kasprik et al.
patent: 4574445 (1986-03-01), Bentin et al.
patent: 5092558 (1992-03-01), Katsura
patent: 5109823 (1992-05-01), Yokoyama et al.
patent: 5127156 (1992-07-01), Yokoyama et al.

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