HIGH-SPEED NON-GRINDING WELDING METHOD FOR TIN-FREE STEEL PLATE

• Main Authors: YOMURA YOSHINORI, ICHIBA MIKIYUKI
• Format: Patent
• Language: English
• Published: 07.07.1998
• Edition: 6
• Subjects: APPARATUS THEREFOR; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; MACHINE TOOLS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; PUNCHING METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PROBLEM TO BE SOLVED: To perform the appropriate and stable high-speed welding of a non- ground tin-free steel plate without generating any problems such as generation of dust in manufacturing a can body by the wire seam welding. SOLUTION: In a method to manufacture a can body by performing the wire seam welding of a non-ground tin-free steel plate having a film consisting of a metallic chromium layer of the prescribed chromium adhesion and a chromium hydroxide layer thereon on a surface of the steel plate at the wire feeding speed of >=15 m/min, wires 1, 2 of each electrode to be used on the outer and inner surface side of the can body is 0.5-3.0 mm in sectional area, a straight part 3 whose contour in the width direction of a weld part of a part to be in contact with the steel plate is of the length 1.0-4.0 times the thickness of the steel plate is provided, the inequalities of L<=W<L+1.5 are satisfied where W is the lap width of the steel plates at weld parts, and L is the length of the straight part 3 of the wires of each electrode, the pressure between the electrodes is 30-150 kgf, and the nugget pitch of the weld part is 0.6-1.8 mm.