Process for forming curved hollow elements and an apparatus...

Details Process for forming curved hollow elements and an apparatus... Process for forming curved hollow elements and an apparatus...

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B21D 22/00 (2006.01) B21C 37/28 (2006.01) B21D 22/21 (2006.01) B21D 24/00 (2006.01) B21D 26/00 (2006.01) B21D 37/00 (2006.01) B21D 51/16 (2006.01)

Patent

CA 1081547

INVENTOR: PAUL-EMILE LAGASSE TITLE : PROCESS FOR FORMING CURVED HOLLOW ELEMENTS AND AN APPARATUS FOR CARRYING OUT THIS PROCESS ABSTRACT OF THE DISCLOSURE In a process for forming curved hollow elements such as elbow joints for pneumatic or hydraulic piping, a blank placed over an inlet opening of a die is shaped by means of a punch having the form of a section of an annulus and driven in a reci- procatory motion about the centre of the annulus. An apparatus for forming the hollow elements comprises a die, a blank retainer arranged to retain a blank over the inlet opening of the die and a punch in the form of a section of an annulus mounted for reci- procatory displacement on an axis of rotation located at the centre of the annulus. - 1 -

305055

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