OUTER CIRCUMFERENTIAL LENGTH MEASURING METHOD OF SPIRAL STEEL PIPE AND ITS DEVICE, AND MANUFACTURING METHOD OF SPIRAL STEEL PIPE AND ITS EQUIPMENT

PROBLEM TO BE SOLVED: To provide an outer circumferential length measuring method of a spiral steel pipe and its device capable of measuring the outer circumferential length of the spiral steel pipe just after welding the outer surface, and a manufacturing method of the spiral steel pipe and its equ...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	YAMADA KATSUHARU, INOUE JUNJI, HANEDA NAOFUMI, MURATA SHIN, UEDA SOICHI, MURAMASU MASATOMO, KIYOTA FUMINORI, IWAMOTO MIKIO
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS PUNCHING METAL SOLDERING OR UNSOLDERING TESTING TRANSPORTING WELDING WORKING BY LASER BEAM
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an outer circumferential length measuring method of a spiral steel pipe and its device capable of measuring the outer circumferential length of the spiral steel pipe just after welding the outer surface, and a manufacturing method of the spiral steel pipe and its equipment capable of correcting successively a molding condition of a strip corresponding to fluctuation of the outer circumferential length of the spiral steel pipe. SOLUTION: A transmitter 19 and a receiver 20 of a surface wave are arranged on the outer surface of the spiral steel pipe 18, and a propagation route of the surface wave is set on a section substantially vertical to the steel pipe axis of the spiral steel pipe 18 across a weld bead part 23 of the spiral steel pipe 18, A propagation time of the surface wave from the transmitter 19 to the receiver 20 is determined, and the route length of the propagation route is calculated by using the propagation speed of the surface wave, and the outer circumferential length of the spiral steel pipe 18 is calculated from the distance between the transmitter 19 and the receiver 20 and the route length. COPYRIGHT: (C)2006,JPO&NCIPI