EP 1276573 A1 20030122 - BENDING DEVICE FOR THIN-WALLED METAL PIPES
Title (en)
BENDING DEVICE FOR THIN-WALLED METAL PIPES
Title (de)
BIEGEVORRICHTUNG FÜR DÜNNWANDIGE METALLROHRE
Title (fr)
DISPOSITIF DE CINTRAGE DE TUBES METALLIQUES A PAROIS MINCES
Publication
Application
Priority
- DE 10020725 A 20000427
- EP 0101479 W 20010210
Abstract (en)
[origin: WO0183130A1] The invention relates to a bending device for thin-walled metal pipes (R), comprising a straight pipe guiding device (1), and a contiguous core template (2) that can be swiveled with respect to the pipe guiding device (1) and that comprises a clamp bar (3). The bending device is further provided with a mandrel with a mandrel tip (4) that is flexible in the zone of the core template (2), and a mandrel shank (5) contiguous to and firmly linked with said mandrel tip (4), said mandrel shank being axially fixed in the pipe guiding device (1). The aim of the invention is to provide a bending device that allows to completely support the inside of the metal pipe (R) to be bent in the respective area of bending during the bending process. To this end, the flexible mandrel tip (4) that consists of a radially incompressible solid elastomer cylinder extends only across the initial section of the bending arc where the process of bending takes place. In order to pull the metal pipe (R) to be bent over said mandrel tip (4), it is clamped over a short length by means of a spherical grip holder (7) that can be inserted in the metal pipe (R) in the zone of the core template (2). Said grip holder (7) is free to move in the swivel zone of the core template (2) with respect to the mandrel tip (4) and is connected to a tensioning device (6) that is configured as a return element.
IPC 1-7
IPC 8 full level
B21D 9/03 (2006.01); B21D 7/025 (2006.01); B21D 9/01 (2006.01); B21D 9/07 (2006.01)
CPC (source: EP US)
B21D 9/01 (2013.01 - EP US); B21D 9/073 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0183130 A1 20011108; AT E257751 T1 20040115; AU 5615201 A 20011112; BR 0110320 A 20031230; CA 2405681 A1 20011108; CA 2405681 C 20060815; CZ 20023541 A3 20031112; CZ 296545 B6 20060412; DE 10020725 A1 20011108; DE 10020725 B4 20050630; DE 50101331 D1 20040219; EP 1276573 A1 20030122; EP 1276573 B1 20040114; ES 2213694 T3 20040901; JP 2003531725 A 20031028; JP 3636444 B2 20050406; US 2003154756 A1 20030821; US 6941787 B2 20050913
DOCDB simple family (application)
EP 0101479 W 20010210; AT 01929341 T 20010210; AU 5615201 A 20010210; BR 0110320 A 20010210; CA 2405681 A 20010210; CZ 20023541 A 20010210; DE 10020725 A 20000427; DE 50101331 T 20010210; EP 01929341 A 20010210; ES 01929341 T 20010210; JP 2001580000 A 20010210; US 25810003 A 20030317