JPH0757847A - Method and device for welding wire - Google Patents

Abstract

PURPOSE:To accumulate a heated molten material in a basin, and utilize the molten metal when cooled to prevent the generation of an indentation or cavity. CONSTITUTION:End parts 13a of aluminium wires 13 having molten metal stopping metal fittings 14 are inserted from both sides of a housing part 1, and brought into contact with an aluminium welding material 12. The ignition tool 7 of the housing part 1 filled with a heating agent 9 is operated, and the heat of oxidation reduction reaction of the agent 9 is added to the material 12 through a bulkhead member 3 to melt it. The molten material 12 is passed through a communicating part 17 and accumulated in a basin part 15. The outflow of the molten aluminium to the outside is arrested by the member 3 and the stopping tool 14 in the position of the molten metal stopping tool 14. When the heating is finished, the fused part starts coagulating and contracting. The molten material stored in the basin part 15 flows into a recessed part or cavity part in the contracted part of the fused part, so that the generation of an indentation or cavity can be prevented.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

Further, in Japanese Patent Application Laid-Open No. 48-34049, a method of arranging an electric wire and a welding material having electrically good characteristics at the end portion of the electric wire and indirectly heating and melting the same to weld them Is disclosed.

However, in the former method, the metal melt generated by the thermite reaction may remain in the welded part of the electric wire and may be mixed in the welded part of the electric wire. Therefore, there is a problem in that the electric resistance deviates from the standard (Japan Cable Industry Association standard JCS 251).

In the latter method, the molten welding material may flow between the external heating portion and the electric wire. For this reason, welding material becomes insufficient due to the flow-out of the welding material, and the electrical resistance becomes a standard (Japan Cable Industry Association standard JCS
There was a problem that it was out of 251).

Therefore, the present inventor first applied for a method for welding electric wires and an apparatus therefor (Japanese Patent Application No. 5-49543) in order to solve such problems. This electric wire welding method and apparatus will be described with reference to FIG.

In the figure, reference numeral 31 represents a housing portion. The accommodating portion 31 includes, for example, a medicine package outer tube 32 made of cardboard, a partition member 33 made of a half-cylindrical iron plate, a donut-shaped end plate 34, a heating agent 35, and an igniter 36.

The accommodating portion 31 has a cylindrical body previously formed by the medicine outer casing 32, the partition member 33, and one end plate 34, and is filled with a heating agent 35 and attached with an igniter 36. , And finally formed by attaching the remaining end plates 34.

The medicine package outer cylinder 32 made of cardboard has a thickness of 3 mm to 5 mm.
The cardboard is formed into a cylindrical shape. The doughnut-shaped end plate 34 is also formed of cardboard similarly to the medicine package outer tube 32.

The partition member 33 made of a half-cylindrical iron plate is made of, for example, an iron plate having a thickness of about 1.5 mm. The partition member 33 made of a half-cylindrical iron plate does not melt up to about 1500 ° C. and can retain its shape.

The heating agent 35 is an application of a redox reaction between a metal oxide represented by a Thermite reaction and a metal or a metal alloy. Here, the composition ratio of the heating agent 35 is as follows: aluminum 25% by weight, iron-aluminum alloy 10% by weight, silicon iron 20% by weight, copper oxide 10% by weight, ferric tetroxide 20% by weight, ferric oxide. 10 wt% and 5 wt% manganese dioxide.

The heating agent 35 only emits heat and does not flow during heat generation. The igniter 36 is for connecting to a power source (not shown) to ignite the ignition charge to operate the heating agent 35.

In the accommodating portion 31, the aluminum welding material 3
7 are arranged. This aluminum welding material 37 is
An aluminum material which is electrically the same as or good in quality as the aluminum electric wires 38, 38 is used.

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. Further, the size thereof is large enough to weld the two aluminum electric wires 38, 38.

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

Further, after the heat-resistant ceramic fiber is 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 upper portion is stopped with cellophane tape or the like. The water stopper 39 is formed by wearing.

The heat-resistant ceramic fibers forming the hot water stoppers 39, 39 have a raised surface, for example, felt. For this reason, the partition wall member 33 made of a half-cylindrical iron plate is easily adapted to the irregularities on the surface of the electric wire.
It is possible to prevent the molten material of the aluminum welding material 37 from flowing out by closing the gap between the aluminum electric wire 38 and the aluminum electric wire 38.

Next, the operation of the apparatus thus constructed will be described. First, a cylindrical body is formed by the medicine package outer cylinder 32, the partition member 33, and one end plate 34, and then the heating agent 35 is filled therein. Then, the igniter 36 is attached to the portion filled with the heating agent 35. Then, finally, the remaining end plate 34 is attached to form the accommodation portion 31.

Next, the aluminum welding material 37 is placed in the accommodating portion 31. On the other hand, the two aluminum electric wires 38, 38 to be connected have their respective end portions 38a, 38
A heat-resistant ceramic fiber is wound around a for a length to fit in the accommodating portion 31, and is fastened with cellophane tape or the like to fix the water stopper 3
9 and 39 are formed.

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

In this state, the igniter 36 of the container 31 filled with the heating agent 35 which causes the redox 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 through the partition wall member 33 of the accommodating portion 31 to heat and melt. The molten aluminum is the end portion 3 of both aluminum electric wires 38, 38.
It flows out along the surface of the electric wire from the portions 8a and 38a.

When the molten aluminum reaches the position of the hot water stoppers 39, 39, the partition wall 33 and the hot water stoppers 39, 39 prevent the molten aluminum from flowing out. After that, when the aluminum is cooled and solidified, the containing portion 3
After destroying 1, the partition wall member 33 of half is disassembled, and the hot water stopper 39 is removed.
Ends 38a, 38a of the two aluminum electric wires 38, 38
It is possible to obtain the aluminum electric wire 40 welded with the molten material of the aluminum welding material 37.

During the redox reaction of the heating agent 35,
The cardboard does not burn at a stretch, and the unburned heating agent 35 does not spill out of the medicine package outer casing 32 during the time from ignition of the redox reaction to 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 causes the partition member 33 of the accommodating portion 31 and the water stoppers 39, 3 to be welded.
9 prevents outflow to the outside.

Further, since the welded portion is closed by the water stoppers 39, 39, it is possible to use the container 31 in a slanted or vertical position, for example, without holding the container 31 in a horizontal position during welding.

As described above, the method and apparatus for welding an electric wire by the present inventor can eliminate the drawbacks of the conventional method and apparatus described above, prevent impurities from being mixed in at the time of heat welding, and weld material. Can be prevented from flowing out.

[0027]

However, in the above method and apparatus for welding electric wires by the present inventor,
The molten material of the heated wires 38 and 38 and the welding material 37 contracts due to the change in volume when the molten state changes to the solidified state, and a generally-known porosity occurs, and at the same time, as shown in FIG. Sometimes the melt welds the electric wire 38,
A recess 42 is formed in the fusion product by flowing through the gap between the end faces of 38.

Therefore, the welded portion (fused portion) 41 of the electric wire
However, there is a problem in that the electrical resistance is out of the standard (Japan Cable Industrial Standard JCS 251). The present invention has been made to solve such conventional problems, and an object thereof is to provide an electric wire welding method and an apparatus for the electric wire, which can prevent porosity and dents in the welded portion of the electric wire. It is in.

[0029]

According to a first aspect of the present invention, the ends of two electric wires to be connected are inserted into a welder with a welding material sandwiched therebetween.
In the welding method of the electric wire in which the welding material is heated and melted by the heat of oxidation-reduction reaction to weld the ends of both electric wires, the molten material of the welding material generated at the time of heating and melting is accumulated in the molten metal pool portion provided in the welder, The outflow of the melt of the welding material at the time of heating and melting is discharged to the ends of the two electric wires while discharging simultaneously generated gas, such as steam, to the outside through a gas exhaust passage provided in the welder. Preventing with the attached water stopper, when the temperature is lowered and the temperature of the molten material is reduced, and the molten material begins to shrink and shrink, the molten material stored in the molten metal pool is poured into this shrinking part and mixed. It was done.

According to a second aspect of the present invention, in the method for welding an electric wire according to the first aspect, a welding material is placed in a molten metal pool portion provided in a welder. According to a third aspect of the present invention, there is provided a medicine package outer tube, a heating agent filled in the medicine package outer tube, which causes an oxidation-reduction reaction, a cylindrical partition wall member with a flange arranged inside the medicine package outer tube, and the partition wall member. Of the tubular partition wall member, and a welding member inserted into the tubular partition member. The flange of the tubular partition member has a welding material at substantially the center thereof. A communicating portion communicating with the communicating portion, a hot water pool portion communicating with the communicating portion, and a gas exhaust passage that connects the hot water pool portion and the end portion side of the flange are formed. The gas exhaust passage and the partition member The flange and the stop member form an exhaust passage.

A fourth aspect of the present invention is the electric wire welding apparatus according to the third aspect, wherein the medicine package outer cylinder is made of a ceramic material. According to a fifth aspect of the present invention, in the electric wire welding apparatus according to the third aspect, the stopper member is made of a ceramic material.

[0032]

In the first and third aspects, first, the stopper member is attached to the flange of the cylindrical partition member. Next, after forming a cylindrical body by the medicine package outer cylinder and one end plate of the partition member, the inside is filled with a heating agent that causes an oxidation-reduction reaction.
Then, the other end plate of the partition member is attached to form the accommodation portion.

Next, the welding material is placed in the accommodating portion. After that, the two electric wires to be connected, each of which has a water stopper attached to each end, are inserted from both ends of the partition member, and the movement of the electric wires is stopped when the tips of the partition members come into contact with the welding material.

Next, the two electric wires are pressed against each other by a holding jig by a normal spring force and joined. In this state, an igniter is attached to the housing, and the igniter is ignited to cause the heating agent to react. The heat of redox reaction by the heating agent heats and melts the welding material via the partition wall member of the accommodating portion.

At this time, a part of the melted welding material passes through the communicating portion of the flange and collects in the molten metal pool. At the same time, gas,
A gas such as water vapor is generated, and this gas is exhausted to the outside from an exhaust passage formed by the flange of the partition wall member and the stopper member through a gas exhaust passage communicating with the hot water pool.

The molten welding material flows out from the end portions of both electric wires along the surface of the electric wires. When the molten welding material reaches the position of the hot water stopper, the partition member and the hot water stopper prevent the molten material from flowing out, and at the position of the hot water stopper, it is cooled and solidified.

After that, when the heating is completed and the temperature is lowered by heat radiation and the fused portion begins to solidify, it simultaneously begins to contract. At this time, the molten material of the welding material stored in the molten metal pool flows into the recessed portion or the porosity portion of the shrinkage portion of the fusion-bonded portion,
Prevents the formation of dents and porosity in the fusion zone.

In the second aspect, first, the welding material is arranged in the molten metal pool formed on the flange of the tubular partition member, and then the stopper member is attached to the flange. Next, after forming a cylindrical body by the medicine package outer cylinder and one end plate of the partition member, the inside is filled with a heating agent that causes an oxidation-reduction reaction. Then, the other end plate of the partition member is attached to form the accommodation portion.

Next, the welding material is placed in the accommodating portion. After that, the two electric wires to be connected, each of which has a water stopper attached to each end, are inserted from both ends of the partition member, and the movement of the electric wires is stopped when the tips of the partition members come into contact with the welding material.

Next, the two electric wires are pressed against each other by a holding jig with a normal spring force to join them. In this state, an igniter is attached to the housing, and the igniter is ignited to cause the heating agent to react. The heat of redox reaction by the heating agent heats and melts the welding material via the partition wall member of the accommodating portion.

At this time, a part of the molten welding material passes through the communicating portion of the flange and collects in the molten metal pool. In addition, the welding material placed in the pool is also heated and melted.

At the same time, gases such as gas and water vapor are generated. This gas passes through a gas exhaust passage communicating with the hot water pool, and then from an exhaust passage formed by the flange of the partition member and the stopper member. Exhausted to the outside.

The molten welding material flows out from the end portions of both electric wires along the surface of the electric wires. When the molten welding material reaches the position of the hot water stopper, the partition member and the hot water stopper prevent the molten material from flowing out, and at the position of the hot water stopper, it is cooled and solidified.

After that, when the heating ends and the temperature drops due to heat radiation, and the fused portion begins to solidify, it simultaneously begins to contract. At this time, the molten material of the welding material stored in the molten metal pool flows into the recessed portion or the porosity portion of the shrinkage portion of the fusion-bonded portion,
Prevents the formation of dents and porosity in the fusion zone.

In the fourth aspect, the trace amount of gas generated during combustion is discharged to the outside from the wall surface of the air-permeable ceramic medicine package outer cylinder. After burning, the generated heating agent slug is held and kept warm by the ceramic medicine envelope until the welding of the electric wire is completed.

In the present invention, the heating agent slug generated after the combustion is held and kept warm by the ceramic stopper member until the welding of the electric wire is completed.

[0047]

Embodiments of the present invention will be described below in detail 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 3 are applied to welding of an aluminum electric wire.

In the figure, reference numeral 1 represents a housing portion. The container 1 includes, for example, a medicine package outer cylinder 2 made of cardboard, a partition member 3 made of a half-cylindrical iron plate, two stop members 4, a donut-shaped end plate 8, a heating agent 9, and an igniter 7. Consists of.

The container 1 has a tubular body previously formed by the medicine package outer cylinder 2, the partition wall member 3 and one end plate 8, and is filled with a heating agent 9 inside, while the remaining end plate 8 is formed. Attach. Finally, it is formed by attaching the igniter 7.

The medicine package outer cylinder 2 made of cardboard is a cylinder of cardboard having a thickness of 3 mm to 5 mm. Donut-shaped end plate 8
Like the medicine package outer cylinder 2, it is also formed of thick paper. The partition member 3 made of a half-cylindrical iron plate has flanges 3a and 3b at both ends.
Have. The one flange 3a is longer than the other flange 3b.

As shown in FIG. 3, a concave portion 3c for forming the pool 15 and a concave portion 3d for forming the communicating portion 17 are formed substantially in the center of one of the elongated flanges 3a.
And a groove 3e for forming the gas exhaust passage 16 is provided.

This partition member 3 made of a half-cylindrical iron plate is
For example, it is made of an iron plate having a thickness of about 1.2 mm. The partition member 3 made of the half-cylindrical iron plate does not melt up to about 1500 ° C. and can retain its shape.

This partition member 3 made of a half-cylindrical iron plate is
The flanges 3a, 3b are fitted with a metallic stopper member 4 having a substantially U-shaped cross section to form a tubular body. The stopper member 4 is, for example, an arc portion 4a having a diameter of 2.4 mm.
Are processed so that

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

The heating agent 9 is an application of a redox reaction between a metal oxide and a metal or metal alloy represented by the Thermite reaction. In the present embodiment, the composition ratio of the heating agent 9 is as follows: aluminum 25% by weight, iron-aluminum alloy 10% by weight, silicon iron 20% by weight, copper oxide 10% by weight, ferric tetroxide 20% by weight, oxidized iron oxide. Diiron was 10% by weight and manganese dioxide was 5% by weight.

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

In the accommodating portion 1, the aluminum welding material 12
Are arranged. This aluminum welding material 12 is made of an aluminum material which is electrically the same as or good in quality to the aluminum electric wires 13, 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. Further, the size thereof is large enough to weld the two aluminum electric wires 13, 13.

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

After the heat-resistant ceramic fiber is wound around the end portions 13a, 13a of the aluminum electric wires 13, 13 for the length to be fitted into the accommodating portion 1, cellophane tape, glass fiber or the like is placed thereon. The hot water stopper 14 is formed by fastening with a tape or the like.

The heat-resistant ceramic fibers forming the hot water stoppers 14 and 14 have a raised surface, for example, like felt. For this reason, the surface of the electric wire can be easily conformed to the irregularities, the space between the partition member 3 made of the half-cylindrical iron plate and the aluminum electric wire 13 can be closed, and the molten material of the aluminum welding material 12 can be prevented from flowing out.

Next, the operation of this embodiment thus constructed will be described. First, the flanges 3a and 3b of the partition wall member 3 divided into two are overlapped, and then the stopper member 10 is fitted. Then, after forming a tubular body by the medicine package outer cylinder 2, the partition member 3, and the one end plate 8, a heating agent 9 is filled into the inside thereof. Then, the remaining end plates 8 are attached. Finally, the accommodating portion 1 is formed by attaching the igniter 7 to the portion filled with the heating agent 9.

Next, the aluminum welding material 12 is placed in the housing portion 1. On the other hand, the two aluminum electric wires 13 and 13 to be connected have their respective end portions 13a and 13a in advance.
The heat-resistant ceramic fiber is wound over the length to be fitted into the housing portion 1 and is fastened with cellophane tape, glass fiber tape, or the like, so that the water stoppers 14, 14, Is formed.

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

In this state, the igniter 7 of the container 1 filled with the heating agent 9 which causes the redox reaction is operated to operate the heating agent 9
React. The heat of redox reaction by the heating agent 9 is
Aluminum welding material 12 through the partition wall member 3 of the housing portion 1
Is added to and melted by heating.

At this time, the molten aluminum welding material 12
Passes through the communicating portion 17 formed by the recesses 3d, 3d of the flanges 3a, 3a, and the recesses 3c, 3c of the flanges 3a, 3a.
It collects in the hot water pool 15 formed in.

At the same time, gas such as gas and water vapor is generated, and this gas is communicated with the hot water pool 15 by the flange 3
a, 3a through the gas exhaust passage 16 formed by the concave grooves 3e, 3e, to the outside from the passage 11 between the upper side of the flanges 3a, 3a of the partition wall member 3 and the circular arc portion 4a of the stopper member 4. Is discharged.

The molten welding material is used for both electric wires 13, 1.
It flows out from the terminal part of 3 along the surface of the electric wire. Also,
The molten aluminum is used for both aluminum electric wires 13, 1.
3 flows out from the end portions 13a, 13a of the wire 3 along the surface of the electric wire.

When the molten aluminum reaches the positions of the hot water stoppers 14, 14, the partition member 3 and the hot water stoppers 14, 14 prevent the molten aluminum from flowing out. After that, when the heating is finished and the temperature is lowered by preheating, and the fused portion begins to solidify, it simultaneously begins to contract.

At this time, the molten material of the welding material stored in the molten metal pool portion 15 flows into the recessed portion or the porosity portion of the shrinkage portion of the fusion-bonded portion, and the formation of the depression or the porosity of the fusion-bonded portion occurs. To prevent. After that, when the aluminum is cooled and solidified, the containing portion 1
After breaking the wall, disassemble the partition member 3 in half, and
By removing 4, the aluminum electric wire welded with the molten material of the aluminum welding material can be obtained similarly to the welded electric wire 40 shown in FIG.

During the redox 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 ignition of the redox reaction to completion of combustion.
Does not spill from the medicine package outer cylinder 2.

As described above, in the present embodiment, when the aluminum welding material 12 is heated and melted by the reaction heat of the heating agent 9, a part of the melted material passes through the communicating portion 17 and the basin 15
At the same time that the gas and water vapor generated during heating and melting do not stop in the partition member 3,
Since the exhaust gas is exhausted through the passage 11 communicating to the outside through the passage 16 formed by the recessed grooves 3e, 3e provided in the flange 3a, the melt that is about to flow out due to the volume expansion of the aluminum welding material 12 cannot be forced. Instead, it can flow into the hot water pool 15.

When the temperature of the melted material is reduced by heating and melting, and the melted material begins to shrink and contract, the melted material accumulated in the hot water pool portion 15 at this contracted portion becomes
Since the welding portions 3 and 13 are configured to flow and mix with each other, it is possible to prevent the dents and the cavities by covering the dents due to the bubbles and the cavities due to the contraction as shown in FIG. 7.

Further, as shown in FIG. 2, since the hot water pool portion 15 is arranged at a position close to the center of the housing portion 1, even if heating by the heating agent 9 is finished, it is heated by its preheating. Therefore, the molten material of the aluminum welding agent 12 stored inside is not cooled rapidly.

Therefore, the molten aluminum welding material 12 can be surely supplied when cooling at the welded portion starts. Further, the welded portion of the molten aluminum welding material 12 is the partition wall member 3 of the housing portion 1 and the water stopper 1.
The outflow to the outside is blocked by 4, 14.

Further, since the welded portion is closed by the water stoppers 14, 14, it is possible to use, for example, diagonally or vertically without holding the container 1 in a horizontal posture during welding.

In the above embodiment, the case where the heat-melted aluminum is temporarily stored in the hot water pool portion 15 has been described. However, as described in claim 2, the aluminum welding material 12 is previously stored in the hot water pool portion 15. You may arrange and place the welding material of the same quality as.

In this case, since the melt to be replenished separately from the aluminum welding material 12 abutting on the both electric wires 13 and 13 is secured in the molten metal pool portion 15, dents and cavities during cooling are formed. Can be reliably prevented.

In the above embodiment, the case where the water stopper 14 is formed by fixing the heat-resistant ceramic fiber to the ends 13a, 13a of the aluminum electric wires 13, 13 has been described. Flat 5-49543
Similar to the No. 1, the water stopper may be formed by fixing the heat-resistant ceramic fiber to the end of the aluminum electric wire and then attaching a half-divided member made of iron, stainless steel, or an aluminum alloy to the rear thereof. .

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

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

Since this paste-like sealing material is a clay-like material, the aluminum electric wire 13 and the partition member 3 of the accommodating portion 1 are used.
Can be in close contact with. Moreover, since the paste-like sealing material can be easily broken even after drying, the removal work becomes easy.

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

In this case, the tubular body is not halved but is broken after welding. This simplifies the removal work. Further, by using a tubular body, there is no need to worry about leakage from the mating portion as in the case of half, and the effect of stopping hot water is improved.

Moreover, these are harmless and can be easily disposed of. Further, in the case of this hot water stopper, if the shape is matched with the surface shape of the aluminum electric wire 13, the space between the aluminum electric wire 13 and the partition wall member 3 of the accommodating portion 1 can be tightly closed, and the molten aluminum welding material. The outflow of 12 can be prevented.

Further, since this 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. Moreover, since it is a tubular body, there is no need to worry about leakage from the mating portion as in the case of half-division, and the effect of preventing hot water is improved.

Further, in the present invention, the partition member 3 and the hot water stopper 14 are made longer than the medicine package outer cylinder 2, and fins are provided on the hot water stopper 14 so that the molten material of the molten aluminum welding material 12 is effective. It may be cooled.

Although the medicine package outer cylinder 2 is made of cardboard in the above embodiment, the medicine package outer cylinder 2 made of cardboard is carbonized at a high temperature when the exothermic composition contained in the medicine package outer cylinder 2 is burned. In addition, since the heat generated by the heat generating agent may burn and the cardboard may peel off, the heat retaining effect of the heat generating agent may vary.

Therefore, in order to solve this problem, as described in claim 4, the medicine package outer cylinder 2 made of a ceramic material containing silica, alumina and a binder as main components.
Can be used.

Here, the ceramic material is obtained by impregnating a cylindrical ceramic fiber with an organic binder such as an acrylic copolymer or an inorganic binder such as colloidal silica, and subjecting the surface to a surface hardening treatment by coating or the like. It is a thing.

The ceramic medicine package outer cylinder 2 has a cylindrical shape or a partially unevenly cylindrical shape, but it is not limited to the cylindrical shape, and may be a rectangular tube shape. This ceramic medicine package 2
When using, the end plate 8 is also replaced with ceramic.

In this way, when the ceramic medicine envelope 2 is used, the trace amount of gas generated by the redox reaction by the heating agent 9 and the water contained in the heating agent 9 become steam, and during combustion, the ceramic Made medicine package outer cylinder 2, end plates 8, 8
More released to the outside.

At this time, the molten material of the welding material stored in the molten metal pool portion 15 is kept warm by the ceramic medicine package outer cylinder 2 which keeps its original shape even after the heating agent 9 is burned. It prevents the occurrence of dents and porosity in the fusion-bonded part by flowing into the dents and porosity in the shrinking part.

Further, in the above embodiment, the case where the metal stopper member 4 having a substantially U-shaped cross section is used has been described. However, as described in claim 5, it is the same as the ceramic medicine package outer cylinder 2. In addition, it can be made of ceramic.

In order to prevent the exothermic agent and the combustion residue from adhering to the material to be welded, for example, Japanese Patent Publication No. 48-40473 discloses the use of asbestos, glass fibers, metal plates, and the like. It discloses the use of asbestos, glass fibers, metal plates, etc. having an exhaust hole for keeping heat to effectively utilize combustion heat.

However, asbestos is a carcinogen and its use is limited. Also, with glass fiber,
Heat resistance is difficult, and in the metal thin-plate pharmaceutical outer casing, the gas generated at the time of combustion of the exothermic agent is sealed inside the medicine package, and an air trap is generated at the welded portion, resulting in lack of welding reliability.

On the other hand, as described above, the use of the ceramic medicine outer casing has the advantage that the temperature of the combustion slag of the heating agent can be kept constant and the combustion gas can be released.

The case where the medicine package outer cylinder 2 and the end plates 8 and 8 are used and the case where the ceramic stopper member 4 is used have been described. It is expected that better effects can be expected by making all of 8, 8 and the stopper member 4 made of ceramic.

In each of the above embodiments, the welding of the aluminum electric wire 13 has been described, but 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 electric wire, and Cu of 99.90% by weight or more is used. The melting point is 1084 ° C. Further, in the present invention, the electric wire is
It may be a single wire or a twisted wire, and is not particularly limited.
When connecting the two, welding is possible even if one wire is a single wire and the other wire is a stranded wire.

[0101]

As described above, according to the first and third aspects, the molten material of the welding material generated at the time of heating and melting is temporarily stored in the molten metal pool, and the generated gas, gas such as steam, etc. Are exhausted through a passage formed by the gas exhaust passage provided on the flange of the partition wall member and the flange of the partition wall member and the stopper member, and a dent formed during cooling of the molten material stored in the hot water pool portion during cooling. And the porosity are surely prevented.

Further, since the partition plate is provided between the heating agent and the electric wire, impurities from the heating agent will not be mixed into the welded portion of the electric wire. Further, since the hot water stopper is arranged between the welding material, the electric wire and the partition plate, it becomes possible to prevent the welding material melted by the heating agent from flowing through the gap between the electric wires and flowing out. Be certain.

According to the second aspect of the present invention, since the welding material of the same quality as the welding material is arranged and placed in advance in the molten metal pool portion, the molten metal pool portion is replenished separately from the welding material abutting both wires. Since the melted material is secured, it is possible to reliably prevent dents and porosity during cooling.

Further, according to the fourth aspect, since the medicine outer casing is made of a ceramic material having good air permeability, a trace amount of gas generated during combustion from the heating agent, water vapor in the heating agent, etc. The gas is released from the medicine outer casing made of ceramic.

Further, even after the heating agent is burned, due to the heat retention hardening of the ceramic medicine package outer cylinder, it flows into the recessed portion or the porosity of the shrinkage portion of the fusion-bonded portion, and the formation of the recessed portion or the porosity of the fusion-bonded portion occurs. To prevent. Further, according to claim 5, even after the heating agent is burned, due to the heat retention hardening of the medicine outer casing made of ceramic, it flows into the concavity of the shrinkage part of the fusion-bonded part or the porosity, and the recessed part of the fusion-bonded part or the casting. Prevent the generation of nests.

[Brief description of drawings]

1 is a method for welding an electric wire according to claim 1 and claim 3
It is sectional drawing which shows one Example which applied the welding apparatus of the electric wire which concerns on it to the welding of the aluminum electric wire.

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

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

FIG. 4 is a perspective view of the partition member of FIG.

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

FIG. 6 is a cross-sectional view showing an aluminum electric wire welded according to FIG.

7 is a cross-sectional view showing an aluminum electric wire welded according to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage part 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 15 Hot water reservoir 16 Gas exhaust passage 17 Communication part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koharu Sato Fukushima Prefecture Nishishirakawa-gun Saigo-mura Osamu Nagasaka letter 2 of 1 Niko Koki Co., Ltd. (72) Inventor Yoshimitsu Sato Nishishirakawa-gun Saigo-mura Osaka Nagasaka character Dou No. 2 No. 1 in Nippon Koki Co., Ltd. (72) Inventor Hideaki Kikuchi 1-8-1 Hisamoto, Takatsu-ku, Kawasaki-shi, Kanagawa Asahi Electric Co., Ltd. (72) Eiji Nishida 1 Hisamoto, Takatsu-ku, Kawasaki-shi, Kanagawa No. 8-1 Asahi Electric Co., Ltd. (72) Inventor Norio Ueno 1812 Yamada, Imaizumi, Nagai City, Yamagata Prefecture Asahi Electric Co., Ltd.

Claims (5)

[Claims] 1. An electric wire in which the ends of two electric wires to be connected are inserted into a welder with a welding material sandwiched therebetween, and the welding material is heated and melted by the heat of oxidation-reduction reaction to weld the ends of both electric wires. In the welding method, the melt of the welding material generated during heating and melting,
A molten material of the welding material during heating and melting, while the gas such as gas and steam generated at the same time is stored outside in the pool of the welder and is discharged to the outside through the gas exhaust passage provided in the welder. The outflow of water is prevented by a water stopper attached to the ends of the two electric wires, and when heating and melting end and the temperature drops and the melt solidifies and begins to shrink, the shrinkage part A method for welding an electric wire, characterized in that the molten material that has been accumulated is made to flow and mix. 2. The method for welding an electric wire according to claim 1, wherein a welding material is arranged and placed in a molten metal pool portion provided in a welder. 3. A medicine package outer tube, a heating agent filled in the medicine package outer tube, which causes an oxidation-reduction reaction, a cylindrical partition wall member with a flange disposed inside the medicine package outer cylinder, and the partition wall member. Of the tubular partition wall member, and a welding member inserted into the tubular partition member. The flange of the tubular partition member has a welding material at substantially the center thereof. A communicating portion communicating with the communicating portion, a hot water pool portion communicating with the communicating portion, and a gas exhaust passage that connects the hot water pool portion and the end portion side of the flange are formed. The gas exhaust passage and the partition member An electric wire welding device, characterized in that an exhaust passage is formed by the flange and the stop member. 4. The electric wire welding apparatus according to claim 3, wherein the medicine package outer cylinder is formed of a ceramic material. 5. The electric wire welding apparatus according to claim 3, wherein the stopper member is made of a ceramic material.