EP 1232808 A3 20040929 - Method for cold rolling seamless copper pipes

Title (en)

Method for cold rolling seamless copper pipes

Title (de)

Verfahren zum Kaltwalzen von nahtlosen Kupferrohren

Title (fr)

Procédé de laminage à froid de tubes en cuivre sans soudure

Publication

EP 1232808 A3 20040929 (DE)

Application

EP 02000996 A 20020117

Priority

DE 10107567 A 20010217

Abstract (en)

[origin: EP1232808A2] Production of seamless non-ferrous, especially copper tubes from a continuously cast or extruded round bar (3) uses a round forging machine with planetary drive. A cooled zone (K) is set up around the forming area (U) by concentrated spraying from all sides with coolant (15). The workpiece is maintained below its recrystallization temperature.

IPC 1-7

B21B 45/02; B21B 19/06

IPC 8 full level

B21B 9/00 (2006.01); B21B 19/06 (2006.01); B21B 45/02 (2006.01); B21B 3/00 (2006.01); B21B 25/04 (2006.01)

CPC (source: EP KR US)

B21B 19/06 (2013.01 - EP KR US); B21B 45/0215 (2013.01 - EP US); B21B 9/00 (2013.01 - EP US); B21B 25/04 (2013.01 - EP US); B21B 2003/005 (2013.01 - EP US); B21B 2045/0227 (2013.01 - EP US)

Citation (search report)

[YA] US 2103574 A 19371228 - WINTERCORN JOHN B
[YA] DE 208746 C
[A] DE 3810261 A1 19881006 - OUTOKUMPU OY [FI] & US 4876870 A 19891031 - RANTANEN MAURI V [FI]
[A] EP 0648855 A1 19950419 - MANNESMANN AG [DE]
[A] EP 0395191 A1 19901031 - MANNESMANN AG [DE]
[A] DE 2929401 A1 19810205 - KABEL METALLWERKE GHH
[A] PATENT ABSTRACTS OF JAPAN vol. 017, no. 607 (M - 1507) 9 November 1993 (1993-11-09)
[A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 550 (M - 1690) 20 October 1994 (1994-10-20)
[A] PATENT ABSTRACTS OF JAPAN vol. 016, no. 422 (M - 1305) 4 September 1992 (1992-09-04)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1232808 A2 20020821; EP 1232808 A3 20040929; CN 1370640 A 20020925; DE 10107567 A1 20020829; JP 2002316201 A 20021029; KR 20020067897 A 20020824; US 2002116971 A1 20020829; US 6651473 B2 20031125

DOCDB simple family (application)

EP 02000996 A 20020117; CN 01133956 A 20010817; DE 10107567 A 20010217; JP 2002038564 A 20020215; KR 20020005789 A 20020201; US 7759702 A 20020215