BELLOWS SHAPING APPARATUS Russian patent published in 2005 - IPC

FIELD: plastic working of metal.

SUBSTANCE: apparatus includes mandrel, lower die, system for supplying pressure transfer fluid and system for air discharge. Die is made of two die halves mounted on mandrel. Outer die half includes two mutually coupled segments having on their inner cylindrical surface annular grooves in the form of bellows corrugations. Inner die half includes four segments having on outer cylindrical surface annular grooves in the form of bellows corrugations. Depth of annular grooves of outer and inner die halves is equal to half of height of corrugations of bellows. System for supplying pressure transfer fluid and system for discharging air are in the form of ducts for supplying high-pressure gas and for air discharge. Said ducts are arranged inside die halves.

EFFECT: enlarged manufacturing possibilities of apparatus due to enlarged assortment of high-quality bellows.

2 dwg