HYDRAULIC PUNCH FOR MAKING FLANGED BOTTOMS Russian patent published in 2012 - IPC B21D26/02 B21D22/22 B21D51/08 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to forging of bottom-type parts. Proposed punch consists of base plate, flanging plate bulged section, and four thrusts. Besides, there is a female die and seal for tightening cavity under blank for feeding pressurised forming fluid and compressed air. Hydraulic punch center has openings to feed and drain forming fluid and to feed compressed air. Note here that all parts of hydraulic punch have working surfaces not subjected to machining.

EFFECT: higher quality of finished products, lower costs.

4 cl, 6 dwg