Title:
STAMPING METHOD BY MEANS OF LIQUID FEMALE TOOL AND ITS DEVICE
Document Type and Number:
Japanese Patent JPS5581025
Kind Code:
A
Abstract:
The present invention provides an improved method for hydro-mechanical stamping wherein hollow products are formed from flat blanks by the cooperation of a punch and a liquid female tool. The present method particularly provides for submerging in the liquid the blank which is to be stamped, the level of the liquid being also maintained above the usual stamping ring. The invention further provides apparatus which acts to center the blank relative to the stamping ring, the present apparatus comprising an additional ring rigidly connected to the stamping ring and having radial apertures therein which form portions of circuitous liquid paths through which liquid flows on stamping, the paths acting to prevent localized rupture during stamping. The present method and apparatus find particular application to the high-speed manufacture of hollow, thin-walled articles of non-cylindrical shape.
Inventors:
BARIRU JIYATSUKU
GABORIOO JIYANNIBU
GABORIOO JIYANNIBU
Application Number:
JP16020879A
Publication Date:
June 18, 1980
Filing Date:
December 10, 1979
Export Citation:
Assignee:
PECHINEY ALUMINIUM
International Classes:
B21D22/20; (IPC1-7): B21D22/22
Domestic Patent References:
| JP46019909A | ||||
| JP46013431A | ||||
| JP46013824A |