Global patent index - EP 1048375 A2

EP 1048375 A2 2000-11-02 - Method for forming a copper blank by cold extrusion

Title (en)

Method for forming a copper blank by cold extrusion

Title (de)

Verfahren zur Umformung eines Kupfer-Rohlings durch Kaltfliesspressen

Title (fr)

Procédé de formage d'une ebauche en cuivre par extrusion à froid

Publication

EP 1048375 A2 (DE)

Application

EP 00108684 A

Priority

DE 19920040 A

Abstract (en)

The cold forming method has a Cu workpiece with a volume corresponding to that of the required end electrode separated from wire with a diameter of 4.5 mm and clamped between a stationary forming matrix (10,11) and a relatively displaced forming stamp (30), moved in the direction of the matrix via a 2-stage forming process. An Independent claim for a cold forming tool is also included.

Abstract (de)

Um bei der Herstellung von Endelektroden aus Kupfer für gasgefüllte Überspannungsableiter mittels einer einstufigen Doppeldruckpresse von einem Rohling ausgehen zu können, der volumengleich zum Fertigteil ist, ist die Einzugseinrichtung des Schneidwerkzeuges auf eine Einzugslänge einstellbar, die kleiner als der Drahtdurchmesser ist, ist die Vorstauchnadel (22) des Preßwerkzeuges auf eine bestimmte Eindringtiefe in die Matrize (10) eingestellt und ist die Matrize (10) des Preßwerkzeuges mit einer speziell dimensionierten Einsatzbüchse (14) versehen.

IPC 1-7 (main, further and additional classification)

B21K 1/14; B21C 23/20; B21J 5/02

IPC 8 full level (invention and additional information)

B21C 23/20 (2006.01); B21J 5/02 (2006.01); B21K 1/14 (2006.01)

CPC (invention and additional information)

B21K 23/04 (2013.01); B21C 23/20 (2013.01); B21J 5/02 (2013.01); B21K 1/14 (2013.01); H01T 21/00 (2013.01)

Designated contracting state (EPC)

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

EPO simple patent family

EP 1048375 A2 20001102; EP 1048375 A3 20081022; DE 19920040 A1 20001102; DE 19964418 B4 20060608; EP 2161085 A2 20100310

INPADOC legal status

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