EP 0614712 B1 19990602 - Method for producing smooth bore guns
Title (en)
Method for producing smooth bore guns
Title (de)
Verfahren zur Herstellung von Flintenläufen
Title (fr)
Procédé pour la fabrication des fusils non rayés
Publication
Application
Priority
DE 4307775 A 19930312
Abstract (en)
[origin: EP0614712A1] The invention relates to a method and a device for producing high strength tubes (1), in particular barrels of shotguns and rifles. In order to reduce the number of work steps during manufacture it is proposed that a circular tube (1) as a blank is processed by means of a pressure roller method which is known per se, such that a) a mandrel (2) of a pressure roller tool (3) is inserted into the circular tube (1), the external diameter of the mandrel (2) corresponding to the internal diameter of the desired finished tube, b) the circular tube (1) is compressed with known pressure rollers (4) with a special geometry, the thickness of the wall is reduced, the length increased and, at the same time, the outer contour of the tube (1) is produced, c) after pressure rolling, the outside diameter of the finished tube (1) is partially turned and the finished tube is cut to size. <IMAGE>
IPC 1-7
IPC 8 full level
B21C 37/15 (2006.01); B21H 7/18 (2006.01)
CPC (source: EP)
B21C 37/153 (2013.01); B21H 7/187 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
EP 0614712 A1 19940914; EP 0614712 B1 19990602; DE 4307775 A1 19940915; DE 59408320 D1 19990708
DOCDB simple family (application)
EP 94103457 A 19940308; DE 4307775 A 19930312; DE 59408320 T 19940308