Brevet : EP1422002 - MACHINE A ROULER

Titre

MACHINE A ROULER

N° et date de publication de la demande

EP1422002 - 26/05/2004

Type de la demande

A1

N° et date de dépôt

EP02702881.0 - 11/03/2002

N° et date de priorité

JP2001235698 - 03/08/2001 ; JP2002026164 - 01/02/2002 ; JP2002047223 - 22/02/2002

Famille de brevets

US2004261483A1 ; WO03013754A1 ; EP1422002A1

Abrégé

This invention provides a bending roll apparatus capable of preventing barrel-like deformation of a pipe occurring during a roll bending work and of manufacturing a small diameter elongated pipe. In an apparatus for manufacturing a pipe by pushing rolls to a core roll, feeding a metal sheet to their contact portions and performing a bending work, the bending roll apparatus comprises a core roll formed of a metal and a plurality of push rolls having a surface portion thereof formed of an elastic material and disposed around the core roll. The invention further provides, in a bending roll apparatus, a core roll formed of a metal, a plurality of push rolls formed of a metal and disposed around the core roll, and holding the core roll when a metal sheet is bent, and a guide belt formed of an elastic material, interposed between the core roll and each of the push rolls, contacting on a core roll surface on a side opposite to an entry side of the metal sheet and driven in synchronism with the core roll.