DIRECT OR INDIRECT METAL PIPE EXTRUSION PROCESS, METAL PIPE EXTRUSION PRESS AND EXTRUDED METAL PIPE

DIRECT OR INDIRECT METAL PIPE EXTRUSION PROCESS, METAL PIPE EXTRUSION PRESS AND EXTRUDED METAL PIPE

If a mandrel for extruding metal pipes, having two axially offset pressing surfaces with different radial characteristics and having a transition region between these two pressing surfaces has a support surface in the transition region then the negative effect of narrowing, which arises owing to the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROTT, Anna, MUSCHALIK, Uwe, VAN PUTTEN, Koos, MAGENHEIMER, Jens
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
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Beschreibung
Zusammenfassung:If a mandrel for extruding metal pipes, having two axially offset pressing surfaces with different radial characteristics and having a transition region between these two pressing surfaces has a support surface in the transition region then the negative effect of narrowing, which arises owing to the mandrel shifting from a first pressing position, in which the first of the two pressing surfaces interacts with a die, to a second pressing position, in which the second pressing surface interacts with the die, can be minimized.