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1. WO1996003249 - METHOD OF MANUFACTURING LASER WELDED PIPES AND APPARATUS FOR MANUFACTURING THE SAME

Publication Number WO/1996/003249
Publication Date 08.02.1996
International Application No. PCT/JP1995/001464
International Filing Date 21.07.1995
IPC
B21C 37/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
08Making tubes with welded or soldered seams
B21C 37/083 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
08Making tubes with welded or soldered seams
083Supply, or operations combined with supply, of strip material
B23K 13/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
13Welding by high-frequency current heating
B23K 13/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
13Welding by high-frequency current heating
01by induction heating
02Seam welding
B23K 26/26 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
20Bonding
21by welding
24Seam welding
26of rectilinear seams
B23K 26/42 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
42Preliminary treatment; Auxiliary operations or equipment
CPC
B21C 37/0811
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
08Making tubes with welded or soldered seams
0807Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
0811removing or treating the weld bead
B21C 37/083
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
08Making tubes with welded or soldered seams
083Supply, or operations combined with supply, of strip material
B23K 13/00
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
13Welding by high-frequency current heating
B23K 13/025
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
13Welding by high-frequency current heating
01by induction heating
02Seam welding
025for tubes
B23K 26/262
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
20Bonding
21by welding
24Seam welding
26of rectilinear seams
262of longitudinal seams of tubes
B23K 26/60
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
60Preliminary treatment
Applicants
  • SUMITOMO METAL INDUSTRIES LIMITED [JP]/[JP] (AllExceptUS)
  • HAYASHI, Tomotaka [JP]/[JP] (UsOnly)
  • INABA, Youji [JP]/[JP] (UsOnly)
Inventors
  • HAYASHI, Tomotaka
  • INABA, Youji
Agents
  • KOHNO, Takao
Priority Data
6/17502127.07.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF MANUFACTURING LASER WELDED PIPES AND APPARATUS FOR MANUFACTURING THE SAME
(FR) PROCEDE ET APPAREIL DE FABRICATION DE CONDUITS SOUDES AU LASER
Abstract
(EN)
During the production of a welded pipe from a metal strip by utilizing laser welding techniques, the end portions of a metal strip are preheated so that the temperature of these portions of the metal strip to be laser welded attains a level not lower than a predetermined level, and the preheated end portions are laser welded to produce a pipe, a weld bead on an outer surface and/or an inner surface of the resultant welded pipe being removed by cutting. This predetermined temperature is set in accordance with the thickness of the metal strip and the length of time between the starting of the laser welding and the ending of the removing of the weld bead. In order that the weld bead of a welded pipe obtained can be cut off, the end portions of the metal strip to be welded are preheated before the starting of a welding operation, whereby the hardening of the weld bead, which is ascribed to the rapid temperature drop in a weld zone after the completion of a laser welding operation, is prevented.
(FR)
Pendant la fabrication d'un conduit soudé à partir d'une bande de métal au moyen de techniques de soudure au laser, on préchauffe les parties d'extrémité de la bande de métal, de manière que la température desdites parties atteigne un niveau non inférieur à un niveau prédéterminé, et on soude lesdites parties au laser afin d'obtenir un conduit, puis on coupe la perle de soudure des surfaces intérieure et/ou extérieure du conduit obtenu, afin de la supprimer. La température prédéterminée est réglée en fonction de l'épaisseur de la bande de métal et de la durée s'écoulant entre le départ du processus de soudure au laser et la fin de la suppression de la perle de soudure. Afin de pouvoir couper la perle de soudure du conduit obtenu, on préchauffe les parties d'extrémité de la bande de métal avant de commencer l'opération de soudure, ce qui permet d'empêcher le durcissement de la perle de soudure provoqué par une chute de température rapide dans une zone de soudure après la fin de l'opération de soudure au laser.
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