FORMATION FOR THICK-WALLED ELECTRIC WELDED TUBE

PURPOSE:To prevent reduction of plate thickness near the end of the plate and slackness of outer surface in roller forming of a thick-walled electric welded tube, by forming a specified part from the end of the plate to an ellipse approximately without bending. CONSTITUTION:In roller forming of a th...

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Bibliographische Detailangaben
Hauptverfasser:	ADAKA MATSUO, NAGAO TAKENAO, HOTSUTA TAKASHI, AOKI ITARU
Format:	Patent
Sprache:	eng
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 WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent reduction of plate thickness near the end of the plate and slackness of outer surface in roller forming of a thick-walled electric welded tube, by forming a specified part from the end of the plate to an ellipse approximately without bending. CONSTITUTION:In roller forming of a thick-walled electric welded tube (plate thickness t/ outer diameter of the tube D/>=0.10), a part l (0.5t