EP 2734314 B1 20170419 - METHOD FOR BENDING A BAND OF SHEET METAL TO GIVE THE BAND A HELICAL SHAPE AND APPARATUS THEREFOR
Title (en)
METHOD FOR BENDING A BAND OF SHEET METAL TO GIVE THE BAND A HELICAL SHAPE AND APPARATUS THEREFOR
Title (de)
VERFAHREN ZUM BIEGEN EINES BANDES AUS BLECH IN EINE HELIXFORM UND VORRICHTUNG DAFÜR
Title (fr)
PROCÉDÉ DE PLIAGE D'UNE BANDE DE TÔLE POUR DONNER À LA BANDE UNE FORME HÉLICOÏDALE ET APPAREIL ASSOCIÉ
Publication
Application
Priority
- IT BO20110435 A 20110721
- IB 2012053161 W 20120622
Abstract (en)
[origin: WO2013011394A1] A method is disclosed for bending a band (4) of sheet metal to give the band (4) a helical shape, and an apparatus (10) is also disclosed for actuating the method. The method comprises steps of: supplying a band (4) of sheet metal shaped as an open ring; abutting a first portion (3) of the band (4) with a first abutting surface (2); exerting a pressure on a radial second portion (19) of the band (4), such that a part of the band (4) comprised between the first portion (3) and the radial second portion (19) assumes a shape alike to a portion of helix. The step of abutting the first portion (3) of the band (4) comprises blocking the band (4). The pressure exerted on the radial second portion (19) is obtained: by contacting the radial second portion (19) of the band (4) by means of a second abutting surface (6), and thereafter rotating the second abutting surface (6) by a first angle and in a predetermined first direction (D1 ) such that the part of the band (4) comprised between the first portion (3) and the radial second portion (19) assumes a shape alike to a portion of helix.
IPC 8 full level
B21D 11/06 (2006.01)
CPC (source: EP)
B21D 11/06 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013011394 A1 20130124; EP 2734314 A1 20140528; EP 2734314 B1 20170419; IT BO20110435 A1 20130122
DOCDB simple family (application)
IB 2012053161 W 20120622; EP 12740689 A 20120622; IT BO20110435 A 20110721