JP2988560B2 - Electric wire welding method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for joining ends of electric wires by welding.

[0002]

2. Description of the Related Art Conventionally, as a method of welding an electric wire, for example, as disclosed in Japanese Patent Application Laid-Open No. 50-53886, a high-temperature metal melt generated by a thermite reaction is poured into an end portion of the electric wire. It is known that the ends of the electric wires are melted by the heat of the melt, and the ends of the electric wires are pressed against each other and welded.

Japanese Patent Application Laid-Open No. 48-34049 discloses a method in which a welding material having good electrical characteristics with an electric wire is arranged at the terminal portion of the electric wire, and this is indirectly heated and melted from outside to weld. Is disclosed.

[0004] However, in the former method, there is a possibility that a molten metal produced by the thermite reaction remains in the welded portion of the electric wire and enters the welded portion of the electric wire. Therefore, there has been a problem that the electric resistance is out of the standard (Japan Cable Industry Association Standard JCS 251).

In the latter method, the molten welding material may flow from between the externally heated portion and the electric wire. As a result, the welding becomes insufficient due to the flow of the welding material, and the electric resistance is standardized (JCS Standard JCS).
251).

In order to solve such a problem, the present inventor has previously filed an application for an electric wire welding method and apparatus (Japanese Patent Application No. 5-49543). The method and apparatus for welding the electric wire will be described with reference to FIG.

In FIG. 1, reference numeral 31 denotes a housing. The housing portion 31 includes, for example, a medicine package outer cylinder 32 made of cardboard, a half-walled partition wall member 33 made of a tubular iron plate, a donut-shaped end plate 34, a heating agent 35, and an igniter 36.

The housing portion 31 is formed in advance by forming a cylindrical body with the medicine package outer cylinder 32, the partition member 33, and one end plate 34, and thereafter, the inside thereof is filled with the heating agent 35 and the igniter 36 is attached. , And finally by attaching the remaining end plates 34.

The cardboard envelope 32 made of cardboard has a thickness of 3 mm to 5 mm.
Is formed in a tubular shape. The donut-shaped end plate 34 is also made of cardboard similarly to the medicine package outer cylinder 32.

The partition member 33 made of a half-tubular iron plate is made of, for example, an iron plate having a thickness of about 1.5 mm. The half-walled partition wall member 33 made of a tubular iron plate can maintain its shape without melting up to about 1500 ° C.

The heating agent 35 is obtained by applying a redox reaction between a metal oxide and a metal or a metal alloy represented by a thermite reaction. Here, the composition ratio of the heating agent 35 is aluminum 25% by weight, iron-aluminum alloy 10% by weight, silicon iron 20% by weight, copper oxide 10% by weight, triiron tetroxide 20% by weight, ferric oxide It was 10% by weight and 5% by weight of manganese dioxide.

The heating agent 35 generates only heat and does not flow during heat generation. The igniter 36 communicates with a power source (not shown) to ignite the ignition charge and activate the heating agent 35.

An aluminum welding material 3 is accommodated in the accommodation portion 31.
7 are arranged. This aluminum welding material 37
The same or better quality aluminum material is used as the aluminum wires 38.

Here, as the aluminum welding material 37, an aluminum material having a purity of 99.9% or more is used. The melting point is 660 ° C. The size is set to be large enough to weld the two aluminum wires 38.

On both sides of the aluminum welding material 37, ends 38 of two aluminum electric wires 38, 38 to be connected are provided.
a, 38a are in contact. Aluminum wire 38,
38 is made of JIS H-2110 (aluminum metal for electrical use). The composition is Al 99.65% by weight or more, Si 0.10% by weight or less, Fe 0.25% by weight or less, Cu 0.005% by weight or less, Mn 0.005% by weight.
% By weight, and Ti + V is 0.005% by weight or less. The melting point is 660 ° C.

After the heat-resistant ceramic fibers are wound around the ends 38a, 38a of the aluminum electric wires 38, 38 for the length to be fitted into the accommodating portion 31, the ends are stopped with cellophane tape or the like. By attaching it, the hot water stopper 39 is formed.

The heat-resistant ceramic fibers forming the water stoppers 39, 39 have a raised surface, for example, like a felt. For this reason, it is easy to adapt to the unevenness of the electric wire surface, and the partition member 33 made of a half-tubular iron plate is used.
And the aluminum electric wire 38 can be closed to prevent the molten material of the aluminum welding material 37 from flowing out.

Next, the operation of the above-configured device will be described. First, after a cylindrical body is formed by the medicine package outer cylinder 32, the partition member 33, and one end plate 34, a heating agent 35 is filled therein. Next, the igniter 36 is attached to a place where the heating agent 35 is filled. Then, the accommodation portion 31 is formed by attaching the remaining end plate 34 at last.

Next, the aluminum welding material 37 is disposed in the housing 31. On the other hand, the two aluminum electric wires 38, 38 to be connected have their ends 38a, 38
a, a heat-resistant ceramic fiber is wound over a length that fits into the housing portion 31 and is fastened thereon with a cellophane tape or the like.
9, 39 are formed in advance.

The aluminum electric wires 38, 38 provided with the hot water stoppers 39, 39 are connected to the ends 3 of the two aluminum electric wires 38, 38 to be connected from both ends of the housing portion 31.
8a and 38a are inserted, and when their respective ends come into contact with the aluminum welding material 37, the movement is stopped.

In this state, the igniter 36 of the container 31 filled with the heating agent 35 that causes an oxidation-reduction reaction is operated to cause the heating agent 35 to react. The heat of oxidation-reduction reaction by the heating agent 35 is added to the aluminum welding material 37 via the partition member 33 of the housing portion 31 and is heated and melted. The molten aluminum is supplied to the end portions 3 of both aluminum electric wires 38, 38.
It flows along the surface of the electric wire from the portions 8a and 38a.

Then, when the molten aluminum reaches the position of the metal stoppers 39, 39, the aluminum is prevented from flowing out to the outside by the partition wall member 33 and the metal stoppers 39, 39. After that, when the aluminum is cooled and solidified,
After destruction of 1, half of the partition wall member 33 is disassembled and the hot water stopper 39 is removed, whereby 2
Ends 38a, 38a of book aluminum electric wires 38, 38
Can be obtained by welding the aluminum electric wire 40 with the molten aluminum welding material 37.

At the time of the oxidation-reduction reaction of the heating agent 35,
The cardboard does not burn at a stroke, and the unburned heating agent 35 does not spill out of the medicine envelope 32 during the time from the ignition of the oxidation-reduction reaction to the completion of combustion.

As described above, in this example, the welded portion 41 of the aluminum welding material 37 melted by the reaction heat of the heating agent 35 is used to separate the partition member 33 of the accommodating portion 31 and the metal stoppers 39 and 3.
9 prevents outflow to the outside.

Further, since the welded portion is closed by the hot water stoppers 39, 39, the holding portion 31 can be used, for example, obliquely or vertically without holding the housing portion 31 in a horizontal posture at the time of welding.

As described above, the wire welding method and apparatus by the present inventor can eliminate all the disadvantages of the above-described conventional method and apparatus, prevent impurities from being mixed during heat welding, and provide a welding material. Can be prevented from flowing out.

[0027]

However, in the above-described method and apparatus for welding electric wires by the present inventors,
As shown in FIG. 7, bubbles 42 remain in the melt of the heated electric wires 38 and 38 and the welding material 37, deteriorating the bonding performance of the welded portion (fused portion) 41 of the electric wire, and the electric resistance is reduced to a standard (Japanese). There is a problem that the electric wire industry standard JCS 251) is deviated.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a method for welding an electric wire capable of reliably removing gases such as gas and water vapor generated during heat welding. And to provide the device.

[0029]

A first aspect of the present invention is to insert the ends of two electric wires to be connected into a welder with a welding material interposed therebetween.
In an electric wire welding method in which a welding material is heated and melted by oxidation-reduction reaction heat to weld both ends of an electric wire, a partition member provided with a gas discharge passage is arranged in the welder, and the heat generated during heating and melting. Gauging tool attached to the ends of the two electric wires while the gas such as steam, steam, or the like is discharged to the outside through a gas discharge passage provided in the welder. Is to prevent it.

A second aspect of the present invention comprises a medicine package outer cylinder, a heating agent for causing an oxidation-reduction reaction filled in the medicine package outer cylinder, and a flange provided with a gas discharge passage. An accommodating portion composed of a cylindrical partition member disposed inside, a stopper member for fitting the flange of the partition member, and a bail stop attached to the end of the electric wire and inserted into the cylindrical partition member A gas exhaust passage provided on a flange of a partition member and a gas exhaust passage provided on a flange of the partition member, and a gas, water vapor, etc. generated by welding and melting the welding material by heat of oxidation-reduction reaction to weld both ends of the electric wire; It is configured to exhaust air through a passage formed by the stop member and the stop member.

[0031]

According to the first and second aspects, first, a welding material is disposed in a cylindrical partition wall member. Next, a stopper member is attached to the flange of the partition wall member. Then, a water stopper is attached to each end of the two electric wires to be connected. Then, the ends of the two electric wires to be connected are inserted from both ends of the partition wall member of the housing portion, and when the respective ends come into contact with the welding material, the movement is stopped.

In this state, the welding machine is operated, and the heat of oxidation-reduction reaction is added to the welding material via the cylindrical partition member to be heated and melted. Gases such as gas and water vapor generated by the heating and melting are discharged to the outside via a gas exhaust passage provided in the flange of the partition member and a passage formed by the flange of the partition member and the stopper member.

Further, the molten welding material flows out from the terminal portions of both wires along the surfaces of the wires. Then, when the molten welding material reaches the position of the stopper, it is prevented from flowing out to the outside by the cylindrical partition member and the stopper, and is cooled and solidified at the position of the stopper.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment in which the electric wire welding method according to claim 1 and the electric wire welding apparatus according to claim 2 are applied to the welding of aluminum electric wires.

In the drawing, reference numeral 1 denotes a housing. The storage section 1 includes, for example, a medicine package outer cylinder 2 made of cardboard, a half-walled cylindrical iron plate-made partition member 3, two stop members 4, a donut-shaped end plate 8, a heating agent 9, an ignition device 7, and the like. Consists of

The housing portion 1 is formed in advance by forming a tubular body with the medicine envelope 2, the partition member 3 and one end plate 8, and then filling the inside thereof with the heating agent 9 and mounting the igniter 7. , And finally by attaching the remaining end plates 8.

The medicine package outer cylinder 2 made of cardboard is formed by forming a cardboard having a thickness of 3 mm to 5 mm into a cylindrical shape. Donut-shaped end plate 8
Similarly, the medicine envelope 2 is made of cardboard. The partition member 3 made of a half-tubular tubular iron plate has flanges 3a, 3b at both ends.
Having. And, at the center of one flange 3a,
A concave groove 3d for forming a gas exhaust passage 3c is formed.

The partition member 3 made of a half-sectioned tubular iron plate is
For example, it is constituted by an iron plate having a thickness of about 1.2 mm. The partition wall member 3 made of a half-tubular iron plate can maintain its shape without melting up to about 1500 ° C.

The half-walled partition wall member 3 made of a tubular iron plate is
The flanges 3a and 3b are fitted with a metal stopper member 4 having a substantially U-shaped cross section to form a cylindrical body. The stop member 4 is, for example, an arc portion 4a having a diameter of 2.4 mm.
Is formed so as to be formed.

As a result, as shown in FIG. 3, when the flanges 3a, 3b of the partition wall member 3 made of a half-cylindrical iron plate are fitted, the exhaust space is provided between the flanges 3a, 3a and the arc portion 4a. A passage 11 is formed.

The heating agent 9 is obtained by applying an oxidation-reduction reaction between a metal oxide and a metal or a metal alloy represented by a thermite reaction. In this embodiment, the composition ratio of the heating agent 9 is 25% by weight of aluminum, 10% by weight of an iron-aluminum alloy, 20% by weight of silicon iron, 10% by weight of copper oxide, 20% by weight of ferric oxide, and Ferrous iron was 10% by weight and manganese dioxide was 5% by weight.

The heating agent 9 generates only heat and does not flow during heat generation. The igniter 7 communicates with a power source (not shown) to ignite the ignition charge and activate the heating agent 9.

An aluminum welding material 12 is accommodated in the housing 1.
Is arranged. The aluminum welding material 12 is made of the same or better quality aluminum material as the aluminum electric wires 13.

In this embodiment, as the aluminum welding material 12, an aluminum material having a purity of 99.9% or more is used. The melting point is 660 ° C. In addition, the size is set to be large enough to weld the two aluminum electric wires 13.

On both sides of the aluminum welding material 12, ends 13 of two aluminum electric wires 13, 13 to be connected are provided.
a, 13a are in contact. Aluminum wire 13,
Reference numeral 13 is made of JIS H-2110 (aluminum metal for electrical use). The composition is Al 99.65% by weight or more, Si 0.10% by weight or less, Fe 0.25% by weight or less, Cu 0.005% by weight or less, Mn 0.005% by weight.
% By weight, and Ti + V is 0.005% by weight or less. The melting point is 660 ° C.

The ends 13a, 13a of the aluminum electric wires 13, 13 are wound with heat-resistant ceramic fibers over the length to be fitted into the accommodating portion 1, and then stopped with cellophane tape or the like. By wearing
A water stopper 14 is formed.

The heat-resistant ceramic fibers forming the water stoppers 14 have a raised surface, for example, like a felt. For this reason, it is easy to adapt to the irregularities on the surface of the electric wire, and the space between the partition wall member 3 made of a half-tubular iron plate and the aluminum electric wire 13 can be closed, so that the melt of the aluminum welding material 12 can be prevented from flowing out.

Next, the operation of the embodiment constructed as described above will be described. First, after the flanges 3a and 3b of the partition member 3 are overlapped, the stopper member 10 is fitted. Next, after a cylindrical body is formed by the medicine package outer cylinder 2, the partition member 3 and one end plate 8, a heating agent 9 is filled therein. Next, the igniter 7 is attached to a place where the heating agent 9 is filled. Finally, the remaining end plate 8 is attached to form the housing portion 1.

Next, the aluminum welding material 12 is disposed in the housing 1. On the other hand, the two aluminum electric wires 13, 13 to be connected have their respective ends 13a, 13a in advance.
Heat-resistant ceramic fibers are wound over a length that fits into the accommodating portion 1 and are fastened with cellophane tape, tape using glass fiber, etc. It is formed.

The aluminum wires 13, 13 provided with the hot water stoppers 14, 14 are connected to the ends 13 of the two aluminum wires 13, 13 to be connected from both ends of the housing 1.
a and 13a are inserted, and when their respective ends come into contact with the aluminum welding material 12, the movement is stopped.

In this state, the igniter 7 of the container 1 filled with the heating agent 9 causing an oxidation-reduction reaction is operated, and the heating agent 9
Is reacted. The heat of oxidation-reduction reaction by the heating agent 9 is
Aluminum welding material 12 via partition member 3 of accommodation portion 1
And melted by heating.

At this time, gas such as gas and water vapor is generated, and this gas flows through the passage 3c formed in the overlapping portion between the flanges 3a of the partition member 3, and the flange 3 of the partition member 3
a between the upper side of a and the arc portion 4a of the stop member 4
Is discharged to the outside.

The molten aluminum flows out from the ends 13a, 13a of the aluminum wires 13, 13 along the surface of the wires. Then, when the molten aluminum reaches the position of the metal stoppers 14, 14, the outflow to the outside is prevented by the partition wall member 3 and the metal stoppers 14, 14.

After that, when the aluminum is cooled and solidified, the accommodating portion 1 is destroyed, the half partition member 3 is disassembled, and the stopper 14 is removed. An aluminum electric wire welded with a melt of a welding material can be obtained.

During the oxidation-reduction reaction of the heating agent 9, the cardboard does not burn at a stretch, and the unburned heating agent 9 is not burned during the time from the ignition of the oxidation-reduction reaction to the completion of combustion.
Is not spilled from the medicine package outer cylinder 2.

As described above, in the present embodiment, the gas, water vapor and the like generated when the aluminum welding material 12 is heated and melted by the reaction heat of the heating agent 9 are provided on the flange 3 a without stopping in the partition member 3. The gas is exhausted through the passage 11 communicating to the outside through the passage 3c formed by the recessed grooves 3d, 3d, so that a dent due to bubbles as shown in FIG.

Further, the welded portion of the molten aluminum welding material 12 is prevented from flowing out to the outside by the partition wall member 3 of the accommodating portion 1 and the metal stoppers 14. In addition, since the welding portion is closed by the metal stoppers 14, the container 1 can be used, for example, obliquely or vertically without holding the housing 1 in a horizontal posture during welding.

In the above embodiment, the case where the hot water stopper 14 is formed by fixing heat-resistant ceramic fibers to the ends 13a of the aluminum electric wires 13, 13 has been described. Hei 5-49543
As in the case of the above, the heat stopper may be formed by fixing a heat-resistant ceramic fiber to the end of the aluminum electric wire, and then attaching a half-split member made of iron, stainless steel or an aluminum alloy to the rear. .

In this case, heat generated by the heating agent is transmitted to half of the members, thereby heating the aluminum electric wires and preventing heat loss during welding. Although not shown, the hot water stopper may be formed of a half-split member made of iron, stainless steel, or an aluminum alloy.

Further, in the embodiment shown in FIG. 1, the hot water stopper 14 is formed by fixing a heat-resistant ceramic fiber, but instead of this, silica or / and alumina or a compound thereof is mainly used. A paste-like sealing material made of an inorganic compound as a component may be provided.

Since the paste-like sealing material is a clay-like material, the aluminum electric wire 13 and the partition member 3
Can be in close contact. In addition, since the paste-like sealing material can be easily broken even after drying, the removal operation becomes easy.

Further, in the embodiment shown in FIG. 1, the heat stopper 1 is fixed by fixing a heat-resistant ceramic fiber.
In this embodiment, a molded body made of silicon oxide, aluminum oxide, or a compound of silicon oxide and aluminum oxide may be used.

In this case, the tube is not divided in half, but is formed into a tubular body and broken after welding. This simplifies the removal operation. Further, by using a tubular body, there is no need to worry about leakage from the mating portion as in the case of a half-split, and the effect of retaining the water is improved.

Moreover, they are harmless and easy to dispose of. Further, in the case of this water stopper, if the shape matches the surface shape of the aluminum electric wire 13, the space between the aluminum electric wire 13 and the partition member 3 of the housing portion 1 can be closed tightly, and the molten aluminum welding material 12 can be prevented from flowing out.

Since the hot water stopper is a material having high heat resistance, it does not deteriorate due to the heat of the molten aluminum welding material 12 or the heating agent 9. In addition, since it is a tubular body, there is no need to worry about leakage from the mating portion as in the case of a half, and the pouring effect is improved.

Further, according to the present invention, the partition member 3 and the metal stopper 14 are made longer than the medicine package outer cylinder 2, and the metal stopper 14 is provided with fins so that the molten aluminum welding material 12 can be effectively melted. It may be cooled.

Although the welding of the aluminum electric wire 13 has been described in each of the above embodiments, the present invention is not limited to this. For example, it can be applied to welding of copper electric wires. The copper electric wire is specified in JIS H-2123 (Tough pitch type copper is used as a material). The melting point is 1084 ° C.

The copper welding material is of the same quality as the copper wire and has a Cu content of 99.90% by weight or more. The melting point is 1084 ° C. Further, in the present invention, the electric wire is
It may be a single wire or a stranded wire, and is not particularly limited.
In connection between the two, welding is possible even if one is a single wire and the other is a stranded wire.

[0069]

As described above, according to the first and second aspects, the gas such as gas and water vapor generated at the time of heating and melting is supplied to the gas exhaust passage provided in the flange of the partition member and the flange of the partition member. Since the gas is exhausted through the passage formed by the stopper member and the stopper member, the generation of the concave portion due to the bubbles at the welding portion is reliably prevented.

Further, since the partition plate is provided between the heating agent and the electric wire, impurities from the heating agent do not enter the welded portion of the electric wire. In addition, since the water stopper is disposed between the welding material, the electric wire and the partition plate, it is possible to prevent the welding material melted by the heating agent from flowing through the gap between the electric wires and to be welded. Be certain.

[Brief description of the drawings]

FIG. 1 is an electric wire welding method according to claim 1, and FIG.
1 is a cross-sectional view showing an embodiment in which the electric wire welding apparatus according to the present invention is applied to welding of an aluminum electric wire.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged sectional view of a main part of FIG.

FIG. 4 is a perspective view of a partition member of FIG. 1;

FIG. 5 is a cross-sectional view showing an embodiment in which the electric wire welding method and the electric wire welding apparatus according to Japanese Patent Application No. 5-49543 are applied to aluminum electric wire welding.

FIG. 6 is a sectional view showing the aluminum electric wire welded according to FIG. 5;

FIG. 7 is a sectional view showing the aluminum electric wire welded according to FIG. 5;

[Explanation of Signs] 1 accommodation section 2 medicine package outer cylinder 3 partition member 3c, 11 passage 4 stopping member 9 heating agent 12 aluminum welding material 13 aluminum electric wire 13a end of aluminum electric wire 13 14 hot water stopper

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshimitsu Sato Nishisaka-mura, Nishishira-mura, Fukushima Pref. (1) Inside the Shirakawa Research Laboratories of Nippon Koki Co., Ltd. (72) Inventor Hideaki Kikuchi 1-8-1, Hisamoto, Takatsu-ku, Kawasaki City, Kanagawa Prefecture Inside Asahi Electric Co., Ltd. Imaizumi Yamada 1812 Asahi Electric Corporation Nagai Laboratory (56) References JP-A-48-34049 (JP, A) JP-A-50-53886 (JP, A) JP-A-6-267633 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/02 H01R 43/02 H02G 1/14 H02G 15/08

Claims (2)

(57) [Claims] 1. An end of two wires to be connected, which is inserted into a welder with a welding material interposed therebetween, and the welding material is heated and melted by heat of oxidation-reduction reaction to weld the ends of the two wires. In the welding method, the outflow of the welding material during heating and melting is performed while discharging gases such as gas and water vapor generated during heating and melting to the outside through a gas discharge passage provided in the welding machine. A method for welding electric wires, characterized in that the electric wire is prevented by a hot stop attached to an end. 2. A medicine package outer cylinder, a heating agent that causes an oxidation-reduction reaction to be filled in the medicine package outer cylinder, and a flange provided with a gas discharge passage, which is disposed inside the medicine package outer cylinder. A housing member comprising a cylindrical partition member to be formed, a stopper member for fitting the flange of the partition member, and a hot-water stopper attached to the end of the electric wire and inserted into the cylindrical partition member. The welding material is heated and melted by the heat of the oxidation-reduction reaction to weld the ends of the two electric wires, and a gas exhaust passage provided in the flange of the partition member for gas, water vapor, and the like generated, the flange of the partition member, and the stopper member The electric wire welding apparatus is configured to exhaust air through a passage formed by the above.