PIERCING MACHINE, AND METHOD FOR PRODUCING SEAMLESS METAL PIPE USING THE SAME

A piercing machine includes a plurality of skewed rolls, a plug, a mandrel bar and an outer surface cooling mechanism. The outer surface cooling mechanism is disposed around the mandrel bar at a position that is rearward of the plug, and with respect to an outer surface of a hollow shell advancing t...

Ausführliche Beschreibung

Bibliographische Detailangaben

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