PIERCING MACHINE AND METHOD FOR MANUFACTURING SEAMLESS METALLIC TUBE USING SAME

A piercing machine is provided that can suppress a temperature difference between a fore end portion and a rear end portion of a hollow shell after piercing-rolling or after elongation rolling. A piercing machine (10) includes a plurality of skewed rolls (1), a plug (2), a mandrel bar (3) and an out...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SAKAMOTO, Akihiro, OBE, Haruka, DAIMON, Yasuhiko
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING
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