JPS595615A - Jointing method of winding conductor - Google Patents

Abstract

PURPOSE:To facilitate trimming and not to produce cupper powder or so apt to scatter by a method wherein after energizing jointed wires to heat and press them, one electrode is replaced by a burr finishing die and then axial pressure is aplied again to remove those burrs which were caused by pressure jointing. CONSTITUTION:After energizing coductors 1a, 1b to heat and joint them under pressure, clamp cylinders 4a, 4b and a pressing cylinder 6 for pressure jointing are released from pressure. Then, an electrode part 3a mounted to an axially movable retaining clamp 2a is detached therefrom and instead a die 9, which has the end shaped into the sharpened form suitable for removing burrs and slotted in size slightly larger than the conductors having been jointed under pressure, is mounted to the retaining clamp 2a. With the position of burrs flown out due to pressure jointing being located near the die 9 thus mounted, the clamp cylinders 4a, 4b are operated. Upon operation of the pressing cylinder 6 for pressure jointing, the retaining clamp 2a and hence the die 9 move axially to cut burrs 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for joining winding conductors of a transformer, an axle, etc.

[Technical background of the invention and its problems]

In recent years, electric power induction appliances are required to have improved reliability due to the increase in the capacity of power systems. For the work of adding windings during the winding work and for joining wires between coils, more reliable current-current welding methods have begun to be used instead of the conventional brazing method.

This common pressure welding method will be explained below.

As shown in FIG.
, 2b are sandwiched between the two electrode parts 3a+3b.

Each of the presser clamps 2a + 2b is provided with a clamp cylinder 4a14b, and the clamp cylinder 4a14b is actuated;
The electrode portion 3a+3b provided at +2b is connected to the bonded wire 1a+
1 = Works to tighten and fix 1b.

Then, the electrode portions 3 a + 3 b 1 are energized in succession to heat the abutted portions of the wires 1 a I lb to be welded, and at the same time, the press cylinder 6 connected to the presser clamps 2 a and 2 b is heated. Activate the wire to be joined to 1a+
lb is joined by applying pressure in the axial direction.

However, in such a joining method by tortoise pressure welding, as shown in FIG. 2, the abutted and heated portions of the wires 1a+1b to be joined flow out due to axial pressure, forming a barrier. The shape of this barrier is ``magnetic pole part 3a+
There is a close relationship with the shape of the tips 8a and 8b provided at the tip number 3b. Since a strong force is applied to the chips 8a+8b when pressurizing them in the axial direction, their shapes are rounded, and the formation of a barrier is unavoidable, and this barrier was finished with a file. Since this sanding work was carried out near the windings, various types of curing were required to prevent copper powder from getting into the windings, and deburring work after joining was required (two hours required).

OBJECT OF THE INVENTION The object of the present invention is to provide a method for joining wire-wound conductors, which improves the above-mentioned conventional drawbacks, facilitates deburring after applying voltage, and does not generate scattering copper powder, etc. Our goal is to provide the following.

[Summary of the Invention] The method for joining wire-wound conductors of the present invention is to heat and pressurize the wires to be joined, replace one electrode with a Paris-finishing die, and then repressurize in the axial direction. This feature is characterized by the fact that the exposed particles are removed.

[Embodiments of the invention]

The joining method of the present invention will be explained below.

In FIGS. 3 and 4, the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals, and the explanation thereof will be omitted.

After electrically heating and pressing the conductor 1allb, the pressure of the clamp cylinder 4a14b and the pressure cylinder 6 is released, and the electrode part 3a attached to the axially movable presser clamp 2a is removed, and the tip is suitable for deburring. A mold 9, which has a convenient shape and is grooved to a size slightly larger than the size of the pressed conductor, is attached to the holding clamp 2a. When the pressure-welded and flowed-out wire is positioned near the attached mold 9 and the clamp cylinders 4a+4b are operated, the electrode part 3b provided on the presser clamp 2b firmly clamps the joined wire 1b and presses the wire 1b. Since the mold 9 provided on the clamp 2a has two grooves that are slightly thicker than the joined wire 13, the joined wire 1a can slide within the mold 9. Next, when the pressure cylinder 6 is operated, the presser clamp 2a and the mold 9 move in the axial direction 42 to scrape off the barrier. The mold 9 is shaped to provide an appropriate distance between the cutting edge of the mold 9 and the electrode portion 8b so that they do not damage each other after forming a barrier.

〔Effect of the invention〕

As described above, if the wire-wound conductor bonding method of the present invention is used, the chips that occur after joining can be easily removed, and the removed chips are also large and will not scatter, reducing the number of man-hours. Great effects can be obtained in terms of quality.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a device used in a conventional welding method using current-current welding, Fig. 2 is a detailed view of the pressure welding part of the conventional current-current welding, and Fig. 3 shows the deburring after pressure welding according to the present invention. FIG. 4 is a sectional view showing an example of a device for removing deburrs. la, lb... Wire to be joined 2a, 2b... Clamp 3a, 3b... Electrode section 4a14b... Cylinder 5a+5b... Cylinder support b... Pressure welding pressure cylinder 7... Bar IJ ga, 8b・
...Chip 9...Model (7317) Agent: Patent attorney Noriyoshi Chika (and 1 other person) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A method of joining wire-wound conductors by voltage welding (Second, the conductors to be joined are held together through their respective electrode parts, the conductors to be joined are heated by electricity, and the electrode parts that hold the conductors are tightened after being joined by applying pressure in the axial direction. A method for joining wire-wound conductors, characterized in that the biasing force is released, one electrode is replaced with a finishing die, and the finishing die is used to remove the generated sparks from the conductor to be joined.