Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1984-08-13
1986-09-16
Husar, Francis S.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72358, 7245301, B21D 2200
Patent
active
046114823
ABSTRACT:
A closed die forging apparatus has a fixed bottom die, and a top die at the bottom end of a piston rod depending from a top die carrier rigidly mounted to the underside of a ram. The top die carrier has defined therein a hollow in which a piston is received for up and down motion relative to the top die carrier, with the piston having the piston rod extending downwardly therefrom. A fluid chamber over the piston communicates with a parallel connection of low pressure and high pressure accumulator systems for successively storing the energy of the fluid in the fluid chamber which is pressurized as the ram decends further after moving the top die into contact with the bottom die. The apparatus may further comprise at least one side punch which is forced into and out of the die cavity by an actuating lever acted upon by another fluid cushioned piston built into the top die carrier. A second fluid chamber over this second piston also communicates with an accumulator which stores the fluid pressure developed as the ram descends further after the side punch has been forced fully into the closed die cavity for forging the metal confined therein.
REFERENCES:
patent: 3290919 (1966-12-01), Malinak et al.
patent: 3523445 (1970-08-01), Pennington
patent: 4470287 (1984-09-01), Antonov et al.
Husar Francis S.
Kabushiki Kaisha Komatsu Seisakusho
Kearns Jerry
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