JPH11156537A - Coil terminal sealing method by arc spot welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve welding strength and welding finish quality by generating an airflow in a territory sealed with an inert gas at a time of welding, and supplying an oxygen portion of an open air to a metal melting portion to make a coil coating burnt completely and having a pickup at a sealing portion removed. SOLUTION: When a coil terminal and a wire is sealed, an air spraying nozzle 10, or an air sucking nozzle 15 or furthermore both of them are installed together at the periphery of a mother material coil 4 terminal, and a welding is carried out by generating an arc between an electrode 19 and the mother material 4 while flowing an air, to melt the terminal of the mother material coil 4. An application of an arc spot welding reduces thermal effects to other than the coil terminal and enables to avoid a lead air pollution at the time of a solder welding and, furthermore, promotes burning of an electric wire coating of the coil terminal by flowing an air at the periphery of the welding potion, and a removal of a fume pickup and the like is made possible. Furthermore, since a surface tension of an arc ball to be formed at the welding time is made stable, an appearance after the welding becomes beautiful.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method which is effective for improving quality when joining a terminal of a coil terminal and a wire by an arc spot welding machine.

[0002]

2. Description of the Related Art A terminal of a coil terminal and a wire are joined together.
Because of low cost and easy operation, joining by soldering is generally used. In addition, as represented by TIG welding, the arc spot welding machine completely shields the electrode and the base material with an inert gas so that gases and impurities such as oxygen and nitrogen in the atmosphere do not enter the molten portion. It is widely used for precise joining of thin parts such as small parts, especially electronic parts and electric parts, because the heat effect on parts other than the welded parts is small.

[0003]

However, in the conventional solder bonding, in order for the solder to completely fuse the terminal of the coil terminal and the wire, the heat temperature rise at the time of heat input is slow and the solder melting temperature is low. Is a low temperature of 350 to 450 degrees, so that a heating time of 2 seconds or more is required. For this reason,
During the heat input, heat reaches the coil bobbin resin via the coil terminal, and accidents due to thermal effects, such as melting of the coil bobbin resin and bending of the coil terminal, have often occurred.

In addition, since the lead component contained in the solder has an adverse effect on the environment and the human body, a joining method other than the solder joining has been demanded from the coil manufacturing industry.

As a well-known technique for solving the above-mentioned problems, in arc spot welding, since a base material and an electrode are joined with an inert gas shielded from the atmosphere, it is very difficult to join thin metal plates. However, in the joining of coil ends, the wire coating causes incomplete combustion between the shielded areas due to the inert gas, and also generates a large amount of hyume during welding. It adheres to the periphery of the part, causing dirt.

In addition, the quality of joining is not stable, for example, the arc sphere formed by melting cannot obtain a sufficient surface tension due to insufficient heat.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems. An object of the present invention is to locally short-circuit a coil terminal by using arc spot welding instead of soldering. By inputting a high temperature in time, it is possible to reduce the thermal effect on places other than the coil end, and it is possible to prevent environmental pollution due to lead damage and adverse effects on the human body. . In addition, by flowing air to the shielded area by inert gas, incomplete combustion of the wire coating is eliminated, dirt at the joint is removed, and the surface tension of the arc ball is sufficiently promoted. Another object of the present invention is to provide a construction method capable of improving the quality of arc spot welding.

[0008]

In order to achieve the above object, in the arc spot welding method for a coil terminal according to the present invention, only an electrode portion is shielded with an inert gas in order to prevent oxidation of the electrode. The flow of the air is generated only at the joint at the tip of the coil end, and the flow of the air is generated near the joint after adjusting the flow rate of the air compressed by the air compressor with the decompression regulator. Air is generated by blowing air through a nozzle provided, or air is suctioned by a vacuum device through a nozzle provided near a joint to generate a flow. The air may be blown, and the suction of the air may be simultaneously performed at a position opposite to the blowing direction.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of construction using arc spot welding according to the present invention. In FIG. 1, a welding control device 1 of an arc spot welding machine includes a gas hose 3 leading to a gas cylinder 2 filled with an inert gas, a coil 4 serving as a base material, output cables 6 and 7 of a torch 5, and a torch 5. A communicating gas hose 8 is connected. An air blowing nozzle 10 and an air compressor 11 are connected to the decompression controller 9 through air tubes 12 and 13. Further, an air suction nozzle 15 and a vacuum device 16 are connected to the air filter 14. They are connected through tubes 17 and 18.

At the time of welding operation, as shown in FIG. 2, an inert gas is discharged from a nozzle 20 around the electrode 19 provided on the torch 5 to prevent the electrode 19 from being oxidized. The air blowing nozzle 10 or the air suction nozzle 15, and furthermore, the air blowing nozzle 10 and the air suction nozzle 15 are used in combination to generate the air flow and
An arc is generated between the base material coil 4 and the base material coil 4.
Is melted and welded.

The air blowing from the air blowing nozzle 10 is performed by adjusting the air flow rate of the air compressed by the air compressor 11 by the decompression controller 9, and the air suction from the air suction nozzle 15 is performed by the air filter. At 14, fumes generated during welding and impurities in the atmosphere are removed, and suction is performed by the vacuum device 16.

[0012]

As described above, in order to join the terminal of the coil terminal and the wire according to the present invention, an arc spot welding machine is used, so that there is little thermal influence on parts other than the coil terminal, and further, lead damage is prevented. Can be.

In addition, only the electrodes are shielded with an inert gas to prevent oxidation, and a flow of the air is generated around the welded portion on the base side to promote the burning of the wire coating on the coil end. It can remove fumes, dirt, etc. and stabilizes the surface tension of the arc sphere formed at the time of welding, so that it is possible to weld high quality coil terminals with clean finish while maintaining sufficient welding strength. is there.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of an arc spot welding machine.

FIG. 2 is a diagram showing a structure around a torch.

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B23K 9/167 B23K 9/167 A H01R 43/02 H01R 43/02 B H02G 1/14 H02G 1/14 A // B23K 101: 38

Claims (1)

[Claims] 1. A pulsed arc welding control current generates an arc between an electrode and a base material in an atmosphere of an inert gas, and generates a flow of air on a molten portion,
A coil end joining method using an arc spot welding machine that completely burns a wire coating of a coil by supplying oxygen in the atmosphere to a melting portion, thereby increasing welding strength and improving welding finish.