MANUFACTURING METHOD OF ELECTRIC RESISTANCE WELDED TUBE

• Main Author: NAKAMURA KATSUAKI
• Format: Patent
• Language: English
• Published: 17.09.2009
• Subjects: 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; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PUNCHING METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a manufacturing method of an electric resistance welded tube by which an end of a workpiece can be prevented from being fused. SOLUTION: In the manufacturing method of an electric resistance welded tube 11, the workpiece 2 is formed which is machined by bending a planar steel plate 1 into a tubular shape, and then both edges 4, 5 are welded to each other from the outside in the axial direction and joined. Shield members 6, 7 having deposition resistance are joined flush with both edges 4, 5 of the ends 2a, 2b of the workpiece 2, so that the welding is performed in a manner straddling over the shield members 6, 7 and both edges 4, 5. COPYRIGHT: (C)2009,JPO&INPIT