Metal deforming – By extruding through orifice – Utilizing internal forming means
Patent
1980-03-14
1982-01-26
Parker, Roscoe V.
Metal deforming
By extruding through orifice
Utilizing internal forming means
72345, 72 43, 72270, B21C 2320, B21C 2332
Patent
active
043122108
ABSTRACT:
A method for warm forging a cup-shaped piece is disclosed. In warm forging a blank is heated between 400.degree. and 800.degree. C. and is inserted within a die having a cross sectional area substantially larger than that of the blank. The ends of the blank are clamped between a recess in the die and a recess in an upsetting punch and the upsetting punch compresses the blank until its sides become sufficiently bulged to almost touch, or touch, the sides of the die. The upsetting punch is then removed and a backward extruding punch is press fitted into the bulged blank and the blank is extruded to form a cup. The extrusion punch is lubricated and cooled by lubricant and coolant applicators at a position remote from the die so that the blank is not prematurely cooled by the coolant.
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Hasegawa Toyofumi
Minami Toshihiro
Nakahara Takeshi
Nishizawa Masatoshi
Kobe Steel Limited
Nippon Koshuha Steel Co. Ltd.
Parker Roscoe V.
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