Apparatus for re-using wires used once for mash seam welding

Details Apparatus for re-using wires used once for mash seam welding Apparatus for re-using wires used once for mash seam welding

B - Operations, Transporting

23

K

B23K 9/12 (2006.01) B23K 11/30 (2006.01)

Patent

CA 2072281

?stract The present invention relates to an apparatus for re-using copper wire which was once used for mash seam welding in a mash seam welder for welding a lap formed by overlapping opposite side edges of a metal sheet between upper and lower roller electrodes via copper wires. The apparatus is provided in a portion of the mash seam welder for taking up the copper wire having been used once for welding. This wire is known as taken-up wire. The apparatus feeds this taken-up wire as rewound wire to the mash welder to be used once again for welding. The apparatus is comprised of a wire shape detection unit which is provided between a taken-up wire feed roller for feeding the taken-up wire and a taken-up wire take-up drum for taking up the taken-up wire fed from the feed roller. The wire shape detection unit detects the shape of the rewound wire and provides a command to stop the feed of the metal sheet from the mash seam welder upon the detection of a defect in the wire shape. A wire braking unit is provided between the wire shape detection unit and a delivery roller for delivering the rewound wire to the welder. The wire braking unit includes a clutch unit for providing a brake force to the rewound wire in the direction opposite to the running direction and is capable of rotation only in the direction of feed of the rewound wire.

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