JPH038573A - Method and equipment for electric arc welding - Google Patents

Abstract

PURPOSE:To perform sure welding without melting and dispersing insulating coating by giving heat energy of an electric arc from the side of a metallic conductor in a state with an insulating coating metallic fine wire and the metallic conductor superposed on each other along the longitudinal direction thereof. CONSTITUTION:The insulating coating metallic fine wire 1a having a small diameter is located at the lower side of a V-shaped groove 2d of a side wall part 2b of a work receiving base 2 and the metallic conductor 3 having a diameter larger than the metallic fine wire 1 is superposed thereon in the longitudinal direction thereof and clamped by a clamping member 4. A plasma arc device is then started to operate and the plasma arc is formed between a plasma arc torch 8 and the metallic conductor 3. The metallic conductor 3 is molten by the heat energy of this arc and its part is cut and the tip molten part is rounded by surface tension. The insulating coating of the tip of the insulating coating fine wire 1a is then dispersed completely by heat of the molten part of the metallic conductor 3 and satisfactory electrical connection is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a welding method and apparatus for welding an insulating coated fully bent wire and a metal conductor using an electric arc.

[Conventional technology]

Fine metal wires and stranded wires coated with insulating materials such as enamelled wires or vinyl coated wires or! In the past, when it was desired to connect conductor wires consisting of 11 wires, soldering was overwhelmingly done automatically or manually.

In such cases, whether automatically or manually, the insulation coating of thin metal wires coated with insulating materials must be chemically removed using chemicals.
Alternatively, the gold g and fine wire of the part of the zero-order insulated thin metal wire from which the insulation coating was removed, which required a process of mechanically removing it with a blade, etc., was wound around the conductive wire, and then the second half of the gold wire was attached to the conductive wire.

[Problem that the invention seeks to solve]

However, conventional methods not only require a step to remove the insulation coating, which is completely separate from the soldering process, but also cause corrosion of the connections if the chemicals used to remove the insulation coating are not removed completely. However, if the chemicals corrode an unnecessary part, there is a problem that dielectric breakdown occurs in that part and the product becomes defective.

In other words, in the conventional method, the process is complicated and there are also problems in terms of processing quality.

[Means for solving problems]

In this invention, in order to eliminate the drawbacks of the conventional method as described above, an insulated thin metal wire and a metal ring are placed in a stacked state along their lengths, and an electric arc is applied from the side of the metal ring. It is characterized by providing thermal energy of .

[Effect]

The thermal energy of the electric arc melts the metal ring, and the melted total flexure covers the insulation-coated thin metal wire underneath, dissipating the insulation coating material, so that both the electrical connection and the mechanical bond are It's easy to do.

〔Example〕

An example M of the present invention will be explained with reference to FIGS. 1 and 2. FIG.

This embodiment shows a case where an enamel-coated thin metal wire of a coil and a thicker copper wire are connected by plasma arc welding.

One workpiece 1, which is a coil, is placed on the bottom 2 of the workpiece pedestal 2.
A $1 is placed between the pair of side walls 2b and 2c. The upper end of the side wall portion 2b is formed with a curved shape R2d as shown in FIG.
It is a figure which shows a part of cross section at -x'.

In the V-shaped groove 2d of the side wall portion 2b, a thin insulated metal wire 1 with a small diameter is located on the lower side, and on top of the thin insulated metal wire 1 is a metal conducting wire 3 that is thicker than the thin insulated metal wire 1! I'm being lied to. The thin insulated metal wire I and the full voltage conductor 3 are clamped in the V-shaped groove 2d by the clamp member 4. The clamp member 4 is preferably provided with a protrusion i'1l14a made of an elastic material such as hard rubber, at least at a location corresponding to the single-shaped groove 2d of the side wall portion 2b of the workpiece pedestal 2. At the time of clamping, the protrusion 4a enters into the 7-shaped groove 2d and clamps the metal conductor wire 3 and the insulated thin metal wire 1.

On the other hand, the other side wall 2c of the workpiece pedestal l is also provided with a groove similar to the side wall 2b, and the metal conductor 3 passes through this groove to the one-shaped groove 2d of the 0I11 wall 2b, and then to the one-shaped groove 2d of the 0I11 wall 2b. Extends to the tip.

A chuck member 6 supported by a support mechanism 5 can be moved along the length of the workpieces, which are the thin insulated metal wire 1a and the metal conductive wire 3, by a drive member 7 such as a cylinder. When the driving member 7 is a cylinder, the chuck member 6 is fixed to the loft tip of the cylinder, and the chuck member 6 also moves forward and backward as the cylinder loft reciprocates. This chuck part 6 is a normal one,
The tips of the thin insulated metal wire 1a and the metal conducting wire 3, or only the insulated metal wire 1a, can be grasped and FIned.

V-shaped yt2d and cha of the side wall portion 2b of the workpiece pedestal 1,
Plasma arc torch 8 is located slightly above the straight line connecting to member 6. The position of plasma arc torch 8 is adjustable.

Next, the operation of this device will be explained.

First, a coil, which is a workpiece 1, is automatically or manually placed on a workpiece pedestal 2, and at this time, its insulation coating RFL, thin wire 1
The tip of a is located in the v-shaped groove 2 of the side wall 2b of the workpiece pedestal 2.
d, but its tip is placed in such a state that it protrudes from the side edge of the single-shaped groove 2d to the extent that the chuck member 6 can grip it. Next, the other workpiece, the metal conducting wire 3, is the thin wire 1a.
Place the workpiece pedestal 2 so that it is above the r! It is fed from the left to the right in the drawing through the groove of the four-wall portion 2c and the single-shaped groove 2d of the side wall portion 2b, and is stopped at a position where its tip is almost aligned with the tip of the insulated thin safe wire 1a.

After that, the clamp member 4 located above the side walls 2b, 2c of the workpiece pedestal 2 descends, and its protrusion 4a enters the V-shaped groove 2d and presses the workpieces 1a, 3 as described above. do. This pressing force is preferably relatively small and strong enough to allow the thin insulated safe wire 1a and the metal conductive wire 3 to move easily due to external tensile force.

Next, the drive member 7 operates to move the chuck member 6 to the left in the drawing. Chuck member 6 is insulated safe thin wire 1a
When the tip of the metal ring body 3 is grasped, the drive member 7 moves the chuck member 6 to the right in the drawing.

At this time, the insulated safe thin wire 1a is straightened by external tensile force, so the insulated safe thin wire 1a and the metal conducting wire 3 are in contact with each other at the welded location.

Next, the plasma arc device starts operating, and a plasma arc is formed between the plasma arc torch 8 and the metal conducting wire 3. The metal conductor wire 3 is melted by the thermal energy of this plasma arc, the part is cut, and the melted part of the tip is curled due to surface tension. Dissipates cleanly and provides good electrical connection.

After plasma arc welding is performed in this manner, the clamp member 4 is raised and the workpieces 1 and 3 are taken out from the workpiece pedestal 2. On the other hand, the chuck member 6 releases the tip portions of the thin insulated safe wire 1a and the metal conductive wire 3 that it grips. In this way, one cycle of the workpiece welding operation is completed.

Next, an embodiment of an automatic welding device will be described with reference to FIG. 3. A plurality of workpiece pedestals 2 are sequentially and intermittently transferred on a pair of guide rails 10 by a drive device (not shown). The workpiece pedestal 2 and the clamp member 4 have a structure as shown in FIGS. 1 and 2, and the ml'
One workpiece 1 and the other workpiece 3, such as a file, are both supported by a workpiece pedestal l and are sequentially transferred. In this case, the insulated safe thin wire 1a of the workpiece 1 and the metal conductor wire 3 are clamped by the clamp member 4 in the V-shaped groove of the side wall ff1t2b of the workpiece pedestal 2, as shown in FIG. extends outwardly from the V-shaped groove. The operation of the workpiece pedestal 2 is adjusted so that these tips temporarily stop directly in front of the chuck member 6, and when the workpiece pedestal 2 stops at its normal position, the chuck member 6 moves to the driving device 7.
move forward to grasp the thin insulated safe wire 1a and the tip of the metal conductor wire 3. Thereafter, the plasma torch 8 is operated to generate a plasma arc to weld these conductors. In this way, welding of the insulated thin metal wire 1a and the metal conductive wire 3 is automatically performed one after another.

Although the above embodiments have been described assuming that the metal conductor wire 3 is not coated with an insulating material, if the metal conductor wire 3 is also coated with an insulating material, an ff-contact plasma arc cannot be formed.

For this purpose, the plasma torch first generates a plasma jet and uses the thermal energy and jet airflow to remove a certain length of the insulation coating on the surface of the metal conductor 3, and then chucks the portion of the metal conductor from which the insulation coating has been removed. Hold it on member 6. As a result, the metal conducting wire 3 is connected to the ground potential via the chuck member 6 and the like, and a plasma arc can be formed between the plasma torch 8 and the metal conducting wire 3.

Furthermore, it is of course possible to remove the insulating coating of the metal conductive wire 3 at a portion located within the V-shaped groove in advance and connect it to the ground potential via the clamp member 4 or the like.

Further, the workpiece pedestal may be of a turntable structure, or the workpiece to be welded may be in a fixed position and the plasma torch may be moved.

Also, depending on the thickness and material of the insulating coating of the fully bent wire, there are cases where it is desirable to remove the insulating coating with plasma jet before welding.

〔Effect of the invention〕

As described above, in the present invention, an electric arc is applied from the side of the insulating coated metal thin wire and the metal conductor having a diameter or width substantially larger than the insulating coated metal conductor when the metal conductor is overlapped along the length direction. Because it provides heat energy of 1,000 yen, there is no need to take a separate step to remove the insulation coating of the fully bent wire and metal conductor before welding, and the fully bent wire does not melt and disappear. Can be welded. Furthermore, such welding can be performed using a device with a relatively simple structure.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining the welding method and device according to the present invention, Fig. 2 is a partial cross-sectional view for explaining the ■-shaped groove portion of the side wall of the workpiece pedestal, and Fig. 3 is a diagram for explaining the welding method and device according to the present invention. 1 is a diagram showing an embodiment of a welding device according to the invention. 1a... Insulated thin metal wire of workpiece ■ 2... Workpiece pedestal 3... Metal conductor wire 4... Clamp member 6.
...Chuck member 8...Plasma torch

Claims (4)

[Claims] (1) In a method of welding an insulating coated thin metal wire and a metal conductor having a substantially larger diameter or width using energy from an electric arc, the insulating coated metal thin wire and the metal conductor are welded together by their lengths. An electric arc welding method characterized in that thermal energy of an electric arc is applied from the side of the metal conductor while the metal conductors are overlapped along the direction. (2) The electric arc welding method according to claim 1, wherein the insulation coating of the insulation-coated thin metal wire is removed by thermal energy of an electric jet before the insulation-coated thin metal wire and the metal conductor are overlapped. . (3) An electric arc welding device for welding an insulating coated fine metal wire and a metal conductor having a substantially larger diameter or width, comprising: a work table having a V-shaped groove; and the insulating coat in the V-shaped groove. a clamping member capable of clamping the fine metal wire in a stacked state with the metal wire on the lower side and the metal conductor on the upper side; An electric arc comprising: a chuck member capable of holding a thin wire and a metal conductor together; and an arc torch disposed above the metal conductor to form an electric arc between the metal conductor and the metal conductor. Welding equipment. (4) The electric arc welding apparatus according to claim 3, wherein the chuck member moves to pull out the insulated thin metal wire and the metal conductor while gripping the thin metal wire and the metal conductor.