APPARATUS FOR CORRUGATING TUBES Russian patent published in 2001 - IPC

FIELD: equipment for making annular corrugations on tubular blanks. SUBSTANCE: apparatus includes mechanism for successively feeding tubular blank, shaped detachable die, power cylinder of shaping unit having elastic punch mounted on its rod. Novelty is smooth detachable die, mechanism for its axial motion, mechanism for drawing together portions of detachable dies. Apparatus also includes mounted on rod: supporting sleeve, spring-loaded one to another pressure sleeve and end nut with sealing members placed with possibility of forming between them annular chamber of batch volume. Apparatus is provided with vessel for forced automatic supply of lubricating fluid to said annular chamber and through annular turning of rod - to set of holes of pressure sleeve. It provides injection of lubricating fluid to deformed zone of blank at each cycle of corrugating. EFFECT: enhanced operational reliability of apparatus. 2 cl, 4 dwg