EP 0338944 A1 19891025 - Method and device for controlling the resilience by bending of an elongated element such as a tube.
Title (en)
Method and device for controlling the resilience by bending of an elongated element such as a tube.
Title (de)
Verfahren und Vorrichtung zur Kontrolle der Rückfederung beim Biegen eines länglichen Teiles wie z. B. eines Rohres.
Title (fr)
Procédé et dispositif pour le contrÔle du retour élastique, lors du cintrage d'un élément allongé tel que tube.
Publication
Application
Priority
FR 8805714 A 19880421
Abstract (en)
The invention relates to the monitoring of the spring-back of a tube (7), or other deformable elongate element, on it being bent by wrapping around a forming component (1), with clamping of the tube (in 5) at a portion (7c) located in front of the bend to be formed. <??>After producing the bend (7a), the portion (7c) of the tube located in front of this bend remains clamped, while its portion (7b) located to the rear of the bend (7a) is released. The extent of the spring- back is determined by a detection means (13) which carries out a measurement or a referencing on the released portion (7b) of the tube located to the rear of the bend (7a). The detection of the spring-back is made on rotation of the tube (7) and of the forming component (1) about the axis (2) of the bend (7a) by detecting the instant when the portion (7b) reaches a predetermined position. <??>This process enables the bending of the tube (7) to be resumed after detecting the spring-back. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 7/024 (2006.01); B21D 7/14 (2006.01)
CPC (source: EP US)
B21D 7/14 (2013.01 - EP US); Y10S 72/702 (2013.01 - EP US)
Citation (search report)
- [X] DD 109331 A1 19741105
- [A] US 3096806 A 19630709 - ROOT CLINTON H
- [A] DE 7222996 U
- [X] PATENT ABSTRACTS OF JAPAN
Designated contracting state (EPC)
AT BE CH DE ES GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0338944 A1 19891025; EP 0338944 B1 19911218; AT E70473 T1 19920115; DE 338944 T1 19900705; DE 68900564 D1 19920130; ES 2028465 T3 19920701; FR 2630358 A1 19891027; FR 2630358 B1 19931210; JP H01306021 A 19891211; US 4979385 A 19901225
DOCDB simple family (application)
EP 89420106 A 19890324; AT 89420106 T 19890324; DE 68900564 T 19890324; DE 89420106 T 19890324; ES 89420106 T 19890324; FR 8805714 A 19880421; JP 9901289 A 19890420; US 34139789 A 19890421