APPLIANCE FOR THE ELECTRIC RESISTANCE WELDING OF LONGITUDINAL SEAMS USING SEAM SQUEEZING

• Main Authors: PANKNIN, WALTER, DR, NOCKHER, GERHARD, RUHL, ROLF
• Format: Patent
• Language: English; German
• Published: 28.10.1987
• Edition: 4
• 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

PCT No. PCT/DE83/00187 Sec. 371 Date Jul. 9, 1984 Sec. 102(e) Date Jul. 9, 1984 PCT Filed Nov. 12, 1983 PCT Pub. No. WO84/01914 PCT Pub. Date May 24, 1984.Device for the semiautomatic or fully automatic electric longitudinal-seam mash resistance welding of can bodies from overlapping, cut-to-size sheet-metal blanks rolled into sidewalls (20), with a guide arranged in front of the welding site for determining the lap width of the sidewall edges (21, 22) including resilient guide elements (32-34), whereby the sidewall edges (21, 22), when traveling toward the welding site, can be pressed against the bases (29, 30) of the groove of a Z-rail (13), and with a calibrating rim (40) arranged in the zone of the welding site, with such a construction of the guide means that the lap width of the sidewall edges (21, 22) at the welding site is at most six times the thickness of the can wall, and with wire electrodes (11) that can be pulled off a reel and are guided over electrode rollers (7, 9), these electrodes being fashioned as flat-wire electrodes (11) having a width exceeding the lap width of the sidewall edges (21, 22) at the welding site. In this arrangement, the Z-rail (13) and the bearing of the electrode rollers (7, 9) are to be simplified. For this purpose, parallel-extending groove bases (29, 30) of the Z-rail (13) are provided, and the axes of the electrode rollers (7, 9) are made to lie in the plane perpendicular to the welding direction.