APPARATUS FOR SHAPING RADIALLY-CORRUGATED BELLOWS TYPE TUBES Russian patent published in 2007 - IPC B21D15/10 B21D26/02 B21D22/10 

FIELD: plastic working of metals, possibly manufacture of radially corrugated bellows type tubes.

SUBSTANCE: apparatus for shaping bellows type tubes includes lower die detachable along its axis and punch. On inner surface of die there are dents and indentations corresponding to profile of bellows. Punch is mounted stationary and it has annular grooves on lateral surface for placing elastic shaping members. Punch also has radial ducts whose number is equal to number of shaping members and axial ducts. Apparatus is provided with distributing unit. Each radial duct is communicated with pressure source through its own axial duct and distributing unit.

EFFECT: enlarged manufacturing possibilities, enhanced efficiency, simplified design of apparatus.

3 dwg