EP 0908245 B1 20020515 - Method and apparatus for producing tubes by cold pilgrim rolling
Title (en)
Method and apparatus for producing tubes by cold pilgrim rolling
Title (de)
Verfahren und Vorrichtung zur Herstellung von Rohren nach dem Kaltpilgerschrittverfahren
Title (fr)
Méthode et dispositif pour fabriquer les tubes par laminage à pas de pélerin froid
Publication
Application
Priority
- DE 19745603 A 19971008
- DE 19750787 A 19971106
Abstract (en)
[origin: US5916320A] Disclosed are a method and apparatus for manufacturing tubes, preferably tubes composed of high-tensile steels or special alloys, using the cold pilger rolling method with two rolling stands which can be moved backward and forward, at least in opposite directions at times and in the rolling direction by means of crank drives. The rolling stands have rollers which are calibrated in a tapering manner and which, driven by toothed racks via cogs, roll over the material to be rolled, with an alternating rotation direction. The majority of the forming work takes place on the first rolling stand and a relatively small portion of the forming work takes place on the second rolling stand and additional smoothing work is carried out. Reduction rolling takes place in both rolling stands via a mandrel which is matched to the roller caliber, and the backward and forward movements of the two rolling stands are matched to one another in such a manner that the angular offset between the crank drives is chosen such that the forming zone of the first stand does not occur at the same time as the forming zone of the second stand.
IPC 1-7
IPC 8 full level
B21B 21/00 (2006.01)
CPC (source: EP US)
B21B 21/005 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
US 5916320 A 19990629; AT E217550 T1 20020615; CA 2234218 A1 19990408; CA 2234218 C 20060530; EP 0908245 A1 19990414; EP 0908245 B1 20020515; ES 2173546 T3 20021016; RU 2205075 C2 20030527
DOCDB simple family (application)
US 3264998 A 19980227; AT 98250040 T 19980202; CA 2234218 A 19980406; EP 98250040 A 19980202; ES 98250040 T 19980202; RU 98103155 A 19980205