EP 1063027 A1 20001227 - METHOD OF PRODUCING PIPES OF RADIAL CROSS-SECTION
Title (en)
METHOD OF PRODUCING PIPES OF RADIAL CROSS-SECTION
Title (de)
VERFAHREN ZUM HERSTELLEN VON ROHREN MIT RADIALEM DURCHSCHNITT
Title (fr)
PROCEDE PERMETTANT DE PRODUIRE DES TUBES A COUPE RADIALE
Publication
Application
Priority
- JP 9907190 W 19991221
- JP 36362798 A 19981222
Abstract (en)
In a method of manufacturing a radial cross section pipe, in order to easily form a fold portion along a desired range in a direction of a pipe axis so that a level difference between a crest portion and a root portion is great, the same number of first pressing sheets (8) and second pressing sheets (9) are alternately arranged by positioning a pipe material (1) along a fold portion forming area in an axial direction at an outer periphery of the pipe material (1). A radial fold portion (12) is formed by deeply pressing the first pressing sheets (8) in a centripetal direction and shallowly pressing the second pressing sheets (9) in the centripetal direction. <IMAGE>
IPC 1-7
IPC 8 full level
B21C 37/16 (2006.01); B21C 37/20 (2006.01); B21D 15/02 (2006.01); B21D 53/06 (2006.01); F16L 11/00 (2006.01); F28F 1/06 (2006.01)
CPC (source: EP)
B21C 37/16 (2013.01); B21C 37/202 (2013.01); B21D 15/02 (2013.01)
Citation (search report)
See references of WO 0037192A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0037192 A1 20000629; EP 1063027 A1 20001227; JP 2000190029 A 20000711; JP 3066366 B2 20000717
DOCDB simple family (application)
JP 9907190 W 19991221; EP 99959950 A 19991221; JP 36362798 A 19981222