METHOD AND DEVICE FOR CAN BODY FORMING Russian patent published in 2016 - IPC B21D21/00 B21D51/26 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for drawing of the can body. Claimed device comprises the piercing and drawing dies, top retainer composed by outer and inner pressure bushes and arranged around the die central piston. All said dies are provided with pistons. Air chamber is connected via air damping channels with the outer pressure bush piston. Note here that said outer pressure bush receives air at the pressure the air chamber receives said air at, or under a lower pressure. The die central puncher incorporates the plug-in cutter to initiate the cylinder drawing. Note here that the inner pressure bush and the die central puncher feature the shaped surfaces. The latter are coupled with opposite surfaces at the die circular core to form and to lock the body inclined wall at the die down stroke. Panel puncher has peripheral surfaces to form the panel wall and body chamfer at the die up stroke.

EFFECT: ruled out thinning of sheet metal.

7 cl, 11 dwg