MANUFACTURE OF WELDED STEEL PIPE BY HIGH ENERGY BEAM

PROBLEM TO BE SOLVED: To obtain a weld zone free of welding defects and also superior in mechanical characteristics by controlling the relation between the irradiation position and the welding speed of a high energy beam. SOLUTION: In the welded steel pipe manufacture in which, in a squeezing stand...

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Bibliographische Detailangaben
1. Verfasser:	OISHI KUNIYASU
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 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a weld zone free of welding defects and also superior in mechanical characteristics by controlling the relation between the irradiation position and the welding speed of a high energy beam. SOLUTION: In the welded steel pipe manufacture in which, in a squeezing stand equipped with squeezing rolls 5 for continuously forming a steel belt into a cylindrical open pipe 6 by a series of roll groups, the butt end of the open pipe 6 is irradiated with a high energy beam 7 and continuously welded; the beam 7 is emitted to the butt part at the entrance of the squeezing rolls 5; and the time until the irradiation part of the beam 7 passes the center line of the squeezing rolls 5 is limited within the range of 0.15 to 0.30 sec.