Resistive welder for coated wire

Abstract

A resistance welding device for a covered wire is capable of well binding a plurality of covered wires in high efficiency. The resistance welding device has a welding head part and a welding power source. The welding head part is provided with an upper electrode, a lower electrode, and a pressurizing part. AC supply voltage with Commercial frequency from three phase alternating current supply terminals is input to the welding power source and is changed to direct voltage or alternating voltage for welding, and the main current supplied to the conducting channel of the welding head part by a pair of output terminals. Two covered wires which are mutual vertically overlapped are clamped from the upper side and the lower side by the upper electrode and the lower electrode and are brought into pressing contact by the pressure from the pressing part. The upper electrode has the shape of rough U or V, the upper end parts of branch parts forming a pair of right and left are made electrode terminals, and the lower end connecting part of the branch parts is made an electrode front end part to be pressurized and brought into contact with covered wires. The lower electrode has the shape of reversed rough U or V, the lower end parts of branch parts forming a pair of right and left are made electrode terminals, and the upper end connecting part of the branch parts is made an electrode front end part to be pressurized and brought into contact with 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 cove...

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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