A PROCESS FOR THE MANUFACTURE OF METAL TUBES

A seamless metal tube (11) is made by elongating an assembly of a tube blank (1) and a metal core (2) by mechanical working, and then stretching the core (12) plastically so that it diminishes in diameter sufficiently to permit its removal from the tube (11). The core metal is preferably a shape mem...

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Bibliographische Detailangaben
Hauptverfasser:	DICELLO, JOHN, A, SIMPSON, JEFFREY, W, CORNELIUS, RAJENDRA, S, HARRISON, JOHN, D, MINHAS, BHUPINDER, S
Format:	Patent
Sprache:	eng ; fre
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:	A seamless metal tube (11) is made by elongating an assembly of a tube blank (1) and a metal core (2) by mechanical working, and then stretching the core (12) plastically so that it diminishes in diameter sufficiently to permit its removal from the tube (11). The core metal is preferably a shape memory alloy. On fabrique un tube (11) en métal sans soudure en allongeant par travail mécanique un ensemble formé d'une ébauche (1) de tube et d'une âme (2) en métal, puis en étirant plastiquement l'âme (12) de manière à ce que son diamètre diminue suffisamment pour qu'on puisse la sortir du tube (11). Le métal dans lequel est réalisée l'âme et de préférence un alliage à mémoire de forme.