EP 2165779 B1 20141231 - Machine of variable linear structure for the formation of tubes
Title (en)
Machine of variable linear structure for the formation of tubes
Title (de)
Maschine mit variabler linearer Struktur zur Formung von Rohren
Title (fr)
Machine à structure linéaire variable pour la formation de tuyaux
Publication
Application
Priority
IT MI20081662 A 20080918
Abstract (en)
[origin: EP2165779A1] The machine (1) for the formation of tubes (2) comprises at least, in series with each other, forming stations (3, 3') comprising pairs of idle rollers (8, 8') which make rototranslational movements of the same amplitude but in opposite directions, and at least one finishing station (5) comprising four idle rollers (91) having a concave profile with a constant curvature and able to perform rototranslational movements of the same amplitude and direction according to 90° axes. The lower rollers (8') of each forming station (3, 3') have an elliptical profile with a curvature decreasing form the outer edge to the inner edge of said roller (8'). The upper rollers (8) of the first forming station (3) have an elliptical profile with a curvature increasing from the outer edge to the inner edge of said roller (8); the upper rollers (8") of the forming stations (3') subsequent to the first (3) have a circular profile.
IPC 8 full level
CPC (source: EP)
B21C 37/08 (2013.01); B21D 5/12 (2013.01)
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
EP 2165779 A1 20100324; EP 2165779 B1 20141231; BR PI0903482 A2 20100720; CN 101676043 A 20100324; CN 101676043 B 20140716; ES 2533660 T3 20150413; IT 1392055 B1 20120209; IT MI20081662 A1 20100319; RU 2009134904 A 20110327; RU 2498872 C2 20131120
DOCDB simple family (application)
EP 09169379 A 20090903; BR PI0903482 A 20090917; CN 200910174777 A 20090917; ES 09169379 T 20090903; IT MI20081662 A 20080918; RU 2009134904 A 20090917