JPH0839264A - Welding method of insulation covered electric wire - Google Patents

Abstract

PURPOSE:To secure initial energizing in spite of insulation covered electric wire, to deform a terminal plate to be welded while softening, further, to utilize the heat generation resulting from deforming for welding of insulation covered electric wire. CONSTITUTION:The insulation covered electric wire 1 is abutted on one-side of a terminal plate 2 to be welded and two points of a forked shape two point contact type electrode 3 stradling the insulation covered electric wire 1 are abutted on one-side of the terminal plate 2 to be welded, one point contact type electrode 4 is abutted at the position symmetrical with the insulation covered wire 1 on one-side of other side of the terminal plate 2 to be welded. Under this state, power is supplied between a pair of electrodes 3, 4 through the terminal plate 2 to be welded and the terminal plate 2 to be welded is deformed as similar to forked shape. Further, the insulation wire 1 is pressed/ deformed with the trough part 30 in the forked two points contact electrode 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding an insulating film electric wire which is in contact with a terminal plate to be welded by pressurizing and energizing a pair of electrodes.

[0002]

[Prior art]

In the conventional method, in order to melt the film of the insulating film electric wire, the shape of the terminal plate to be welded for connecting the wire is complicated to form the heat generating portion, or a route different from the route of the welding main current by the electrode is formed. An auxiliary branch current is formed, thereby melting the film.

In the former conventional method, the terminal to be welded has a complicated and expensive shape, which increases the cost. The latter conventional method increases the cost of welding equipment. An object of the present invention is to devise an electrode shape so that an insulating film electric wire can be easily and inexpensively welded to a terminal to be welded.

[0004]

In the present invention, a bifurcated two-point contact type electrode and a one-point contact type electrode that straddle an insulating film electric wire are used. Insulation film electric wire abuts on one side of the terminal plate to be welded, two points of the two-point contact type electrode straddling the insulation film electric wire abuts on one side of the terminal plate to be welded, and insulation film on the other side of the terminal plate to be welded A single-point contact type electrode is brought into contact with a position symmetrical to the electric wire. Electric current is applied between the pair of electrodes through the terminal plate to be welded, and the terminal plate to be welded is deformed by the pair of electrodes so as to approximate the forked shape. Further, the insulated wire is deformed under pressure at the valley portion of the bifurcated two-point contact type electrode.

[0005]

[Function] A two-point contact type electrode that crosses over an insulating film electric wire secures energization. The generated heat is concentrated on the contact portion of the one-point contact type electrode, and facilitates the deformation of the terminal plate to be welded from there. The terminal plate to be welded is deformed by the pressure applied to the pair of electrodes. This is a modification similar to a bifurcated shape of a two-point contact electrode. In the present invention, the heat generated by this deformation is used as a part of the heat required for welding.

[0006]

Embodiments The illustrated embodiments will be described. The insulating film electric wire 1 is brought into contact with one surface (the upper surface in the drawing) of the terminal plate 2 to be welded. Two points 5 and 5'of a bifurcated two-point contact type electrode 3 straddling the insulating film electric wire 1 are brought into contact with one surface (the upper surface in the drawing) of the terminal plate 2 to be welded. One side of the other side of the terminal plate 2 to be welded (upper surface shown)
The one-point contact type electrode 4 is brought into contact with a position symmetrical with the insulating film electric wire 1 in FIG. Under the above-mentioned circumstances, electricity is applied between the pair of electrodes 3 and 4 via the terminal plate 2 to be welded. In addition, a pair of electrodes 3
At 4, the terminal plate 2 to be welded is deformed so as to approximate the bifurcated shape. At the stage of this deformation, the insulated wire 1 is pressure-deformed in the valley portion 30 of the bifurcated two-point contact type electrode 3. The initial energization path is as shown in 6 of FIG. FIG.
Although the welding current 6 of 2 cannot pass through the insulating film electric wire 1, the two points 5 and 5 ′ of the two-point contact type electrode 3 come into contact with the terminal plate 2 to be welded to secure the conduction. The welding current 6 is concentrated on the contact 5 "of the one-point contact type electrode 4 and heat is generated there. One of the effects is to soften the terminal plate 2 to be welded and make it easily bent. The pair of electrodes 3 and 4 The terminal plate 2 to be welded is deformed so as to resemble the shape of the forked shape with the pressurization by one.One of the deformation effects is that the deformation heat effectively participates in the energization heat. The insulated coating electric wire 1 is pressed and deformed at the valley portion 30 of the two-point contact type electrode 3. The bifurcated two-point contact type electrode 3 regulates the displacement of the insulating coating wire 1 at this stage. At this stage, the insulation film of the insulation film electric wire 1 breaks and acts as a bare electric wire, so that the welding current 6 of the path including the electric wire 1 shown in Fig. 2 flows. With a terminal board formed near the brim of the That. Insulating coating wire 1 corresponds to the winding start end or winding end of the coil wire (magnet wire).

[0007]

According to the present invention, the initial energization is ensured even though it is an insulating film electric wire, and the terminal to be welded is deformed while being softened. Therefore, this deformation is also easy, and the heat generated by the deformation is generated. Since it can be used, welding is generally cheap and easy.

[Brief description of drawings]

FIG. 1 is a sectional view showing an initial stage of a welding process.

FIG. 2 is a sectional view showing an end stage of a welding process.

[Explanation of symbols]

2: Welded terminal plate, 1: Insulated film electric wire, 3: Two-point contact type electrode, 4: One-point contact type electrode, 5.5 '/ 5': Contact point,
6: welding current, 30: valley

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[Procedure amendment]

[Submission date] April 13, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

Claims (1)

[Claims] 1. An insulating film electric wire is brought into contact with one surface of a terminal plate to be welded, and two points of a bifurcated two-point contact type electrode straddling the insulating film electric wire are brought into contact with one surface of the terminal plate to be welded, A single-point contact type electrode is brought into contact with a position symmetrical to the insulating film electric wire on the other surface of the terminal plate to be welded, and current is supplied between the pair of electrodes via the terminal plate to be welded,
Further, the pair of electrodes deforms the terminal plate to be welded so as to approximate the forked shape, and the insulated wire is pressed and deformed at a valley portion in the forked two-point contact type electrode. Welding method for insulating film electric wires.