EP 2399688 A1 20111228 - Process and device for bending tubes, wires or strips of metal into a helical coil or spring comprising a plurality of turns
Title (en)
Process and device for bending tubes, wires or strips of metal into a helical coil or spring comprising a plurality of turns
Title (de)
Verfahren und Vorrichtung zum Aufwickeln von Rohr, Draht oder Band aus Metal zu einem Helixform oder Spiralfeder
Title (fr)
Procédé et dispositif d'enroulement de tube, fil ou bande métallique en un élément ou un ressort hélicoidal à plusieurs spires
Publication
Application
Priority
- IT MI20101124 A 20100622
- IT MI20111077 A 20110615
Abstract (en)
The present invention concerns a procedure and a machine for bending filiform material such as a tube, a wire, a bar, a strip of metal into coil or spring, preferably helicoidal, comprising continuously bending a single filiform material (3) into a coil or a spring so that the filiform material (3) assumes a helical course comprising a plurality of turns (S). The procedure comprises the steps of measuring the radius of curvature (R) of a first bent portion (3c) comparing it with a pre-defined ideal radius of curvature (R I ), applying a correction if necessary. The procedure also comprises measuring the diameter (D) of a turn (S I ) during the bending and comparing it with a pre-defined ideal diameter (D I ). On the basis of this comparison, the ideal radius of curvature (R I ) is modified to correct the course of the curvature. The machine employs a sensor (8) and a CPU.
IPC 8 full level
B21D 7/024 (2006.01); B21D 7/14 (2006.01); B21D 11/00 (2006.01); B21D 11/06 (2006.01); B21D 11/10 (2006.01); B21F 3/06 (2006.01)
CPC (source: EP)
B21D 7/024 (2013.01); B21D 7/14 (2013.01); B21D 11/06 (2013.01); B21D 11/10 (2013.01); B21F 3/06 (2013.01)
Citation (search report)
- [XA] EP 0767016 A2 19970409 - ADELHOF ALOIS [DE]
- [A] WO 2009101649 A2 20090820 - CML INT SPA [IT], et al
- [A] WO 2005005071 A1 20050120 - ORTIC AB [SE], et al
- [T] EP 2248611 A1 20101110 - CML INT SPA [IT]
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2399688 A1 20111228; IT 1400500 B1 20130611; IT MI20101124 A1 20111223; IT MI20111077 A1 20111223
DOCDB simple family (application)
EP 11005022 A 20110621; IT MI20101124 A 20100622; IT MI20111077 A 20110615