Resistive welder for coated wire

Abstract

A resistance welding device for covered wires, which efficiently and well combines a plurality of covered wires. It is equipped with a welding head and a welding power supply unit. The welding head is equipped with an upper electrode, a lower electrode and a pressurizing part. The welding power supply unit can input the commercial frequency AC power supply voltage from the three-phase AC power supply terminals (R, S, T), convert it into DC or AC voltage for welding, and supply the main current 1w from a pair of output terminals to the conduction of the welding head. circuit. The upper electrode and the lower electrode sandwich the two covered wires that overlap each other from the upper and lower sides, and are pressurized and contacted by the pressurizing force from the pressurizing part. The upper electrode is U-shaped or V-shaped, the upper ends of a pair of left and right limbs are used as electrode terminals, and the lower connecting parts of the limbs are the front ends of the electrodes that are in pressurized contact with the two covered wires. The lower electrode is in an inverted U or V shape, the lower ends of a pair of left and right limbs are used as electrode terminals, and the upper connecting parts of the limbs are the front ends of the electrodes that are in pressure contact with the two covered wires.

Description

technical field [0001] The present invention relates to a resistance welding device for covered wires for joining a plurality of covered wires to each other by resistance welding. Background technique [0002] Covered wire refers to a wire in which the conductor is covered with an insulating film such as polyimide, polyamideimide, polyurethane, coating material, or vinyl. Now, when two covered wires are welded, it is not necessary to do chemical or mechanical pretreatment first, and the resistance welding device for the covered wire that is combined by only energizing, that is, resistance welding, is well known. . In this resistance welding device, an intermediate electrode is added between the upper electrode on the welding head and the workpiece (covered wire). For the lower electrode, the intermediate electrode forms a bypass circuit. [0003] According to this structure, in the initial stage of energization, since the insulating film of the cov...

AI Technical Summary

Problems solved by technology

However, this method requires a very troublesome operation of reversing the upper and lower sides of the two coatings, and requires a lot of processes and time. The productivity is not good, and the problem is not fundamentally solved.

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