JPH05114450A - Connection method for conductor coated with insulator and connected body - Google Patents

Abstract

PURPOSE:To improve connection strength by previously applying a connection assisting agent to a groove surface in an open side of a conductor terminal and forming an alloy layer consisting of the conductor and the connection assisting agent by pressure and electricity application in the case a conductor coated with an insulator is inserted in the groove of the U-shaped conductor terminal and joined with the terminal. CONSTITUTION:A U-shaped conductor terminal 5 is inserted between an upper electrode 1 and a lower electrode 4 of a resistance soldering apparatus. Both end parts of an insulator coating-bearing conductor wire 10 formed like a coil are inserted in the U-shaped groove and the conductor 10 and the terminal 5 are connected each other by resistance soldering. In that case, a connection assisting agent 9 is previously applied to the inner face of the groove of the U-shaped groove of the terminal 5. The insulator coating 11 of the conductor 10 is carbonized by a first pressing/electricity application and at the same time the connection assisting agent 9 is melted to form an alloy layer 13 having higher melting point than the connection assisting agent 9 in the groove face of the open end part of the terminal 5. The carbonized insulator coating 11 is eliminated from the gap between the terminal 5 and the conductor 10 by second pressing/electricity application and at the same time the open end of the terminal is joined through the alloy layer 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a joined body for insulating coated conductors, and particularly, for joining both ends of an insulating coated conductor formed in a coil shape and conductor terminals enclosing both ends thereof, The present invention relates to a method of joining an insulating coated conductor and a joined body by removing the insulating coating during joining to obtain a joined portion having excellent conductivity, mechanical strength and corrosion resistance.

[0002]

2. Description of the Related Art Insulated coating conductors formed in a coil shape,
As a method of connecting with a conductor terminal that encloses a part of the insulating coated conductor, a thermocompression bonding method is used as disclosed in Japanese Patent Publication Nos. 50-18940 and 56-28355. In this method, the insulated conductor is covered with an insulating coating so that it cannot be energized. Therefore, there is a U-shape that consists of two parallel side members and a semi-annular member that connects one end of each side member in advance. Insert an insulating coated conductor into the groove of the conductor terminal, sandwich both side members with the upper electrode and the lower electrode, pressurize, and pass a current between the electrodes to heat the U-shaped conductor terminal and insulate with the heat. The coating is carbonized and removed, and the core wire of the insulating coated conductor and the conductor terminal are contacted and connected. In this joining method, a resistance welding machine is used, the energization time is short, the core wire of the insulating coated conductor and the conductor terminal are only in mechanical contact, and are not metallic joints. Therefore, as a means for securing the bonding strength, a connection utilizing crimping by a pressing force is adopted, but it has a drawback that the fatigue strength is low and the electrical characteristics are remarkably deteriorated during long-term use.

As an improved technique, Japanese Patent Application Laid-Open No. 61-199575 discloses a method of arranging a joining conductor between an insulation-coated conductor and a conductor terminal and melting it to connect the insulation-coated conductor and the conductor terminal. Has been done. Cu-50Sn or Cu- as a conductor for joining
Although 45Zn and the like are shown as examples of use, they have a drawback that they have high melting temperatures and are oxidized during heating of the carbonization treatment of the coating, and as a result, reliable connections cannot be obtained.

[0004]

In the above-mentioned prior art, the joint portion between the insulating coated conductor and the conductor terminal is not sufficient from the viewpoint of metallic joining, so that the mechanical connection strength is low, and vibration and heat cycle are involved. Due to the loosening of the terminals due to such loads, there was a problem with the reliability of the electrical characteristics.
That is, the conventional joining method is effective in removing the insulating coating, but has a problem in achieving highly reliable metallic joining.

Therefore, in the present invention, carbonization of the insulating coating of the insulating coated conductor and metallurgical bonding (metallurgical reaction)
Decided to think separately. That is, the U-shaped conductor terminal is structured to have a holding portion for inserting and holding the insulating coated conductor and an opening end portion such that the groove opening of the conductor terminal can be closed by sandwiching the insulating coated conductor. A bonding aid (brazing material) with a relatively low melting point component is previously attached to the inner surface of the open end of the U-shaped conductor terminal, and the insulation-coated conductor wire is inserted into the holding portion of the U-shaped conductor terminal. Is pressurized and electrically heated to carbonize and insulate the insulation coating of the insulation coating wire, and at the same time, the inner surface of the opening end is metal-bonded through the alloy layer composed of the components of the bonding aid and the components of the conductor terminal. By doing so, it has been found that a strong joint can be realized that joins the insulated wire and the conductor terminal.

An object of the present invention is to achieve high joint strength and heat resistance by metallically joining the inner surface of the opening end of the conductor terminal housed so as to wrap the insulating coated conductor through the alloy layer as described above. It is intended to provide a method for joining an insulating coated conductor and a joined body capable of obtaining a joined joint having properties.

[0007]

In order to achieve the above object, a method of joining an insulating coated conductor according to the present invention is such that an insulating coated conductor is formed by integrating two parallel side members and one end of each side member. Of the insulation-coated conductor wire which is inserted into the groove of the substantially U-shaped conductor terminal composed of the semi-circular member connected to and is pressed from the outer surfaces of the two side members and energized to join the insulation-coated conductor wire and the conductor terminal. In the joining method, a joining aid is attached in advance to at least the groove surface on the opening side of the conductor terminal, and the insulating coating of the insulating coated conductor is carbonized and the joining aid is melted by pressing and energizing the conductor terminal. An alloy layer is formed on the groove surface of the opening end part of the conductor terminal and the constituent of the bonding aid, and then the carbonized insulating coating is discharged from the groove of the conductor terminal and the groove surface on the opening side is formed. Metal bonding is possible through the alloy layer. It is characterized in.

In the method of joining the insulation-coated conductor, the insulation coating of the insulation-coated conductor is carbonized and an alloy layer is formed on the groove surface of the opening end of the conductor terminal from the first step of pressurization and energization. Also, the carbonized insulating coating is discharged from the groove of the conductor terminal, and the groove surface on the opening side is metal-bonded via the alloy layer. It is better to use electric current.

It is preferable that the joining aid has a melting point lower than the thermal breakdown temperature of the insulating coating and reacts with the material of the conductor terminal to form an alloy layer having a higher melting point than the joining aid.
Or, if it is composed of Fe-based material, the joining aid is Sn
Alternatively, it is preferable to use Zn, or two or more kinds of Sn, Zn, Au, Ag, Pb, P, Pd, Cu and Bi, which have a melting point of 450 ° C. or lower.

In addition, the insulation coating is Y specified in JIS C 4003.
Insulated wires of any one of A, E, B, F, H, and C types are targeted.

The pressure applied in the second stage is 1 to 5 kg.
/ Mm ² is preferable, and if the pressure is 1 kg / mm ² or less, the joint strength is not sufficient, and if it is 5 kg / mm ² or more, the joint portion is excessively deformed, which is not preferable.

Further, the conductor terminal is not limited to the one having the above U-shaped groove, but may be one having a horizontally long through hole, may be an integral one having a horizontally long through hole, or may be a horizontally long through hole. It may be composed of two side members forming a wire. In the case of a laterally long through hole, a bonding aid is preliminarily attached to at least one end side surface of the laterally long through hole of the conductor terminal to complete the bonding. It may be any as long as the end-side surface of the through hole can be metallically joined so that the core wire of the insulation-coated conductor is sometimes sufficiently fastened by the conductor terminal.

[0013]

It is convenient to use a resistance welding machine capable of performing pressurization and electric heating as the joining device for carrying out the method of joining the insulated coated wire of the present invention. This is because heating and pressing can be done at the same time, and moreover, joining can be done in a short time. In the actual bonding work, the bonding in the atmosphere is convenient for mass production and low-cost bonding. In this case, the shorter the bonding time, the less reaction with oxygen and the better the bonding. In addition, the resistance welding machine preferably employs a two-stage heating / pressurizing method in order to further enhance the reliability of the joint.

That is, in the first-stage pressurization and energization, the insulating coating of the insulating coating wire is carbonized, and at this time, the bonding aid is melted because the melting temperature is lower than that of the insulating coating material, and the conductor terminal is melted. The reaction proceeds with the formation of an alloy layer at the interface between the joining aid and the base material of the conductor terminal. Then, the carbonized insulating coating is discharged to the outside of the joint surface by the second step of pressurization and energization, and at the same time, the terminals are brought into contact with each other by pressure through the alloy layers formed at the terminal interface to join them. ..

The joining aid satisfying these various conditions must be a metal element that easily forms an alloy layer with the base material of the conductor terminal at a melting temperature of 450 ° C. or lower. Here, if the terminal is Cu and a Cu alloy, elements having good reactivity with Cu are Sn, Zn, Au, Ag, P, Pd, etc., but Pb, Bi, etc. are also contained in order to adjust the melting point. It may be. On the contrary, a bonding aid having a low melting point is more convenient because an alloy layer is likely to be formed in the case of heating for a short time.

For example, when Pb-50% Sn is used as a joining aid, its melting temperature is about 200.degree. If the coil is a polyester insulation coating (called PEW), the carbonization temperature is about 550 ° C
Therefore, first of all, at least by heating and pressurizing the first step
Heated above 550 ℃. During that time, Pb-50Sn melts and reacts with the Cu base material of the conductor terminal, forming a Cu-Sn alloy layer at the interface with the conductor terminal and unreacted Pb, Sn in the center between the base materials. There is. Next, the PEW carbide is discharged by second-stage heating and pressurization, and the core wires of the insulation-coated conductor wires from which the coating has been removed and the conductor terminals are electrically connected. On the other hand, in the joining of the openings of the conductor terminals, unreacted Pb and Sn are pushed out of the joining surface, and only the Cu-Sn alloy layer remains in the joining portions. The thickness of the alloy layer was approximately 2 μm.

When this component is analyzed by EPMA, Cu-20-3
It has a melting point of 7% as can be seen from the Cu-Sn binary phase diagram.
The temperature will be over 00 ℃ and the joint strength will be improved to over 10kgf / mm ² . Although low melting point solder is used,
The joint after joining has high strength and high heat resistance. Similar results can be obtained by applying a bonding aid having other components. As the alloy layer to be formed, in the case of Au-Sn, Cu-Au-Sn, Cu-Sn-Ag in the case of Sn-Ag, Cu-Sn-Zn in the case of Sn-Zn, Cu in the case of Zn -Zn can be obtained respectively.

When joining a Fe-based terminal base material, Fe is contained in the alloy layer instead of Cu. The alloy layer thus formed can withstand 150 ° C. or higher, and even if the insulating coating material is damaged, the joint can sufficiently withstand. In addition, in order to obtain such excellent characteristics, 1-5 kgf / mm
It is necessary to apply a pressure of ² .

Any insulating coating material to which the present invention can be applied is applicable as long as it is melted or carbonized by heating. That is, enamel copper wire (EW), formal copper wire (PVF), polyester copper wire (PEW), and amidimide copper wire (AIW) can be applied from low heat resistance to high heat resistance.

[0020]

EXAMPLE An example of the method for joining the insulating coated conductors of the present invention will be described below. FIG. 1 shows that both ends of the insulation-coated conductive wire 9 formed in a coil shape are inserted into the U groove of the U-shaped conductor terminal 5,
It is a figure which shows the basic process of joining these insulation coating conductors 9 and the conductor terminal 5 (henceforth the terminal 5) by resistance welding. FIG. 2 is a chart showing the pressure and the welding current which are the resistance welding conditions.

FIG. 1 (a) is a view showing an arrangement state of members to be joined. In the figure, a substantially U-shaped terminal 5 is provided between an upper electrode 1 and a lower electrode 4 facing each other of a resistance welding machine. Are sandwiched in a laid state, and both ends of the insulating coated conductor wire 10 are inserted in the portion corresponding to the bottom of the U groove of the terminal 5 with their ends oriented in the same direction. The U-shaped terminal 5 used in this embodiment is the lower electrode 4
The lower side member 7 abutting against is straight while the upper electrode 1
The upper side member 6 abutting on is formed in two steps in the direction of closing the opening on the U groove opening side, and the portion corresponding to the bottom connecting the upper side member 6 and the lower side member 7 is a semicircular semi-circular member 8. The upper side member 6 further includes a grip portion 6b that wraps around the insulating coated conductor wire 10.
And an overhanging portion 6a that overhangs the insulating coating conductor 10. Then, the joining aid 9 is previously attached to the inner surface of the U groove of the terminal 5. This bonding aid can be applied in a general manner, such as by clad the terminal, applying powder in paste form, spraying by spraying, wrapping foil, plating, etc. The method of is applicable.

The tip of the upper electrode 1 is formed in two steps in conformity with the shape of the upper side of the terminal 5, and the portion 2 where the insulating coated conductor 10 is joined by abutting the grip portion 6b of the terminal 5 and the terminal 5 projecting. And a portion 3 that joins the open end of the terminal 5 by abutting against the portion, and the tip of the lower electrode 4 is flat according to the shape of the lower side of the terminal 5. The insulation-coated conductor wire 10 is composed of a Cu core material 12 and an insulation coating 11 covering the core material 12. In the state where the members are arranged in this way, the pressing force P and the energizing current I are zero as shown in FIG.

FIG. 2 (b) shows the state of the terminal 5 and the insulation-coated conductor 10 in the first step of heating / pressurizing with electricity.
Terminal 5 is pressed by electrodes 1 and 4 and current is
1, through the terminal 5 and the lower electrode 4, the terminal 5 generates resistance heat. The resistance coating heats the insulating coating 11. The heating temperature is slightly higher than the carbonization of the insulation coating 11, and at that time,
The joining aid 8 also melts, and the component in the terminal and the component of the joining aid react with each other at the interface between the terminal 5 and the joining aid 8 to form the alloy layer 13. Usually, the thickness of this alloy layer is 7 μm or less.

FIG. 1 (c) shows the second step of the energization heating / pressurizing process. As shown in FIG. 2, the applied pressure P and the current I are the same as those in the first step of the energizing heating / pressurizing step. Make each higher. At this time, the carbonized insulating coating 11 is discharged to the outside of the joint surface of the terminal 5 along with the discharge of the melted joining aid 9, and the Cu core materials 12 are electrically connected to each other, and the core material 12 and the conductor terminal 5 are electrically connected. To be done. On the other hand, the reaction of the alloy layer on the inner surface of the terminal 5 further progresses by heating, and by applying a pressing force, the unreacted components of the terminal 5 are discharged by the joining aid 8, and the alloy layers at the open end of the terminal 5 Are metallically joined. The pressing force at this time is 1 to 5 k
g / mm ² is good. If it is 1 kg / mm ² or less, the joint strength is not sufficient, and if it is 5 kg / mm ² or more, the joint is excessively deformed, which is not preferable.

Example 1 A U-shaped terminal 5 made of Cu was used, and an insulating coated conductor 10 was made of an amide-imide copper wire.
(AIW), Sn-3.5% Ag (melting temperature: about 230 ° C) is plated and adhered as a bonding aid 8 formed on the inner surface of the terminal 5, and the insulation coating is applied by the bonding method described in FIG. The lead wire 10 and the terminal 5 were joined. The electrode of the resistance welding machine was composed of Mo, and the pressure applied to the terminal joint surface was 2 kgf / mm ² .

Example 2 A terminal 5 made of Cu is used,
Polyester copper wire (PEW) is used as the insulating coated conductor wire 10, Sn (melting temperature: about 240 ° C.) plating is formed to 10 μm on the joining aid 9, and heating is performed through the Mo electrode by the joining method described in FIG. By applying pressure, the insulating coated conductor 10 and the terminal 5 were joined. The pressure applied to the terminal joint surface at that time was 3 kgf / mm ² .

<Comparative Example 1> In the combination of Example 2, the pressing force applied to the terminal joint surface was not specially applied, and the insulation-coated conductor wire 10 and the terminal 5 were similarly joined by using a resistance welding machine. ..

<Comparative Example 2> As shown in FIG. 3, the terminal 5 has a short side portion and has no portion protruding from the insulating coating conductor wire inserted into the U groove, and is made of Cu. Amidoimide copper wire (AIW) is used as the conductive wire 10, Sn-3.5% Ag (melting temperature: about 230 ° C.) is plated and adhered to the bonding aid 9, and a resistance welding machine by electric heating / pressurization is used. The insulating coated conductor 10 and the terminal 5 were joined. The electrode material was Mo and the applied pressure was 1 kgf / mm ² .

Tensile tests were carried out on the bonded bodies obtained in the above Examples 1 and 2 and Comparative Examples 1 and 2. The tensile test was carried out by cutting the tip portion of the conductive wire 10 protruding from the terminal 5 so that the truest bonding strength could be seen. The reason for cutting the tip of the conductive wire is to remove the effect that if the tip remains as it is, the tip is caught in the terminal during the tensile test and the effect of constriction appears.

The results of the tensile test show that, in the joined bodies obtained in Comparative Examples 1 and 2, the conductor wire 10 was pulled out from the joint portion between the conductor wire 10 and the terminal 5. Also, in the high temperature tensile test at 150 ℃,
The high temperature tensile strength was lower than the room temperature strength.

On the other hand, as in Examples 1 and 2, the joined body in which the joining surface of the opening of the terminal is joined via the alloy layer as in Examples 1 and 2 is broken from the conductor wire itself in any of the Examples. did. Also, the wire was broken in a high temperature tensile test at 150 ° C. That is, the joints were sound with strength higher than that of the base metal, and showed high joint strength and high heat resistance.

When the joining state of the joined portion was observed by a microscopic structure, a black line indicating a poor joining was observed at the joining interface between the terminal and the conducting wire in the joined body of the comparative example, and no metallic joining was observed. ..

On the other hand, in Examples 1 and 2 of the present invention,
Metallic joints were also observed at the joints between the conductors and terminals, and good metallic joints were found at the joints on both sides of the terminals. The alloy layer of Example 1 was Cu-Sn-Ag from the results of EPMA analysis.
Had been formed. Further, the alloy layer of Example 2, Cu-Sn
Had been formed. These alloy layers are 2-4 μm present,
It was observed that the terminals were metallically joined together via the alloy layer.

It was also confirmed that this interface was changed to the melting temperature of 230 ° C. or 240 ° C., which is the melting temperature of the first joining aid, and it was found that the heat resistance was also improved.

In the above-mentioned tensile test, the joined bodies obtained in the respective examples of the present invention have stable strengths because the joining aid reacts with the base material of the conductor terminal to form an alloy layer, A major factor is that the openings of the conductor terminals are closed between the alloy layers and metal bonding (or metallurgical bonding) is sufficiently achieved. It was also found that this state shows a stable numerical value with a very low electrical resistance.

Other bonding aids such as Au-Sn, Zn alone or Zn-Sn, Sn-Pb, Sn-P can be selected and used, and good bonding can be achieved and used for a long time. It will also be stable.

In each of the above-mentioned embodiments, the auxiliary agent was adhered to the entire joint surface of the terminals, but essentially only the portion where the terminals are joined is sufficient. As the terminals, in addition to the modified U-shaped terminals used in Examples 1 and 2, the section shown in FIG. 4 has a race track shape, the section shown in FIG. 5 has a rectangular ring shape, and as shown in FIG. A terminal composed of a pair of concave pieces with flanges each having a concave cross section and having flange portions at both ends, a terminal in which a strip is wound in a racetrack shape as shown in FIG. 7, and both ends thereof are overlapped, or a flange as shown in FIG. It is possible to obtain a joined body which may use a terminal in which the recessed piece and the flat plate are combined.
In addition to those with insulation coating as the conductor to be joined,
A heat-resistant joined body can be similarly obtained by using a conductor and a terminal, which are previously stripped of coating, in combination. Further, by applying ultrasonic vibration instead of the resistance heating, the same peeling of the coating and the joining of the alloy layers of the terminal portion can be achieved.

[0038]

According to the present invention, a method of joining a conductor insulation covered conductor is described in connection with a U-shaped conductor terminal in which a bonding agent having a low melting point is adhered to at least an opening end of a U-shaped groove surface. Insert the end of the insulation-coated conductor into the groove, carbonize the insulation coating of the insulation-coated conductor by pressing / energizing in the first step, and melt the bonding aid to the groove surface of the opening end of the conductor terminal. An alloy layer having a melting point higher than that of the joining aid is formed, and the insulating coating carbonized by the second step pressurization / current application is discharged from between the conductor terminal and the core wire of the insulating coated conductor, and the opening end of the groove of the conductor terminal is alloyed. Since the method of joining is done through layers, the conductor terminals are closed and the core wire of the insulation-coated conductor wire is tightened, and the joining is excellent in joining strength and heat resistance due to the metal joining by the alloy layer, and also shows a low electrical resistance value. A joint is obtained, and this joint is a safe conductor for a long time. To be able to use.

Further, instead of the U-shaped groove, a conductor terminal having a horizontally long hole shape is used, a bonding aid is attached to the end of the horizontally long hole, and the same bonding as described above is carried out, whereby the bonding strength and It is possible to obtain a durable joint having excellent heat resistance, good electrical connection, and durability.

[Brief description of drawings]

[Figure 1]

FIG. 1 is a cross-sectional view showing a connection state of an insulating coated conductor wire and a U-shaped conductor terminal at each stage in one embodiment of the present invention.

FIG. 2 is a diagram schematically showing a pressing force and a conduction current at each stage in one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a bonded joint of a comparative example.

FIG. 4 is a cross-sectional view showing a joined state of conductor terminals forming a horizontally elongated hole.

FIG. 5 is a cross-sectional view showing a joined state of conductor terminals forming a horizontally long hole.

FIG. 6 is a cross-sectional view showing the shape of a conductor terminal that is an application example of the present invention.

FIG. 7 is a cross-sectional view showing the shape of a conductor terminal that is an application example of the present invention.

FIG. 8 is a cross-sectional view showing the shape of a conductor terminal that is an application example of the present invention.

[Explanation of symbols]

 1 Upper electrode 2 Tip of the upper electrode (pressurizes the insulated wire) 3 Tip of the upper electrode (presses the opening of the conductor terminal) 4 Lower electrode 5 Conductor terminals 6a, 6b Side members above the conductor terminal 7 Side member on the lower side of the conductor terminal 8 Semi-annular member of the conductor terminal 9 Joining aid coil 10 Insulation coating conductor wire 11 Insulation coating 12 Cu core material 13 Alloy layer

Claims (10)

[Claims] 1. An insulating coated conductor wire is inserted into a groove of a substantially U-shaped conductor terminal formed of two parallel side members and a semi-ring member integrally connecting one end of each of the side members to each other. In a method of joining an insulating coated conductor in which an insulating coated conductor and a conductor terminal are joined by applying pressure from the outer surface of one side member and energizing, a joining aid is attached in advance to at least the groove surface on the opening side of the conductor terminal. First, by pressing and energizing, the insulating coating of the insulating coating wire is carbonized and the joining aid is melted to form the conductor terminal in the groove surface of the opening end of the conductor terminal and the component contained in the joining aid. Is formed, and then the carbonized insulation coating is discharged from the groove of the conductor terminal and the groove surface on the opening side is metal-bonded via the alloy layer. 2. An insulating coated wire is inserted into a groove of a substantially U-shaped conductor terminal, which is composed of two parallel side members and a semi-ring member that integrally connects one ends of the side members, and 2 In a method of joining an insulating coated conductor in which an insulating coated conductor and a conductor terminal are joined by applying pressure from the outer surface of one side member and energizing, a joining aid is attached in advance to at least the groove surface on the opening side of the conductor terminal. , The insulation coating of the insulation coating wire is carbonized by pressurization and energization in the first step, and the bonding assistant is melted to contain the component forming the conductor terminal and the bonding assistant in the groove surface of the opening end of the conductor terminal. Forming an alloy layer consisting of components,
By the pressurization and energization in the second step, the insulating coating carbonized using the higher pressure and higher current in the first step is discharged from the groove of the conductor terminal and the groove surface on the opening side is inserted through the alloy layer. A method for joining an insulating coated wire, which comprises metal joining. 3. The insulating coated conductor wire, wherein the bonding aid has a melting point lower than the thermal breakdown temperature of the insulating coating and reacts with the material of the conductor terminal to form an alloy layer having a melting point higher than that of the bonding aid. How to join. 4. The conductor terminal is made of Cu, and the joining aid is
3. Sn or Zn, or two or more of Sn, Zn, Au, Ag, Pb, P, Pd, Cu and Bi, and has a melting point of 450 ° C. or lower A method for joining insulated wires. 5. The conductor terminal is made of an Fe-based material, and the joining aid is made of Sn or Zn, or two or more of Sn, Zn, Au, Ag, Pb, P, Pd, Cu and Bi. The method for joining insulating coated wires according to claim 1 or 2, which has a melting point of 450 ° C or less. 6. The insulating coated wire according to claim 4 or 5, wherein the insulating coating is any one of types Y, A, E, B, F, H and C specified in JIS C 4003. How to join. 7. The pressure applied in the second step is 1 to 5 kg / mm ²
The method according to claim 6, wherein the insulating coated conductor is joined. 8. An insulation-coated conductor wire is inserted into the laterally long through hole of a conductor terminal having a laterally long through hole, and pressure is applied from the outer surfaces of the two side members forming the laterally long through hole, and electricity is applied to insulate. A method of joining an insulating coated conductor for joining a coated conductor and a conductor terminal, wherein a joining aid is attached in advance to at least one end side surface of a laterally long through hole of a conductor terminal by pressing and energizing, First, the insulating coating of the insulating coated wire is carbonized, and the joining aid is melted to form an alloy layer on the surface of the one end of the through hole, the alloy layer being composed of the components that form the conductor terminal and the components that the joining aid contains. A method for joining insulating coated conductors, characterized in that the carbonized insulating coating is discharged from the groove of the conductor terminal and the surface on the one end side of the through hole is metal-bonded via the alloy layer. 9. An insulation-coated conductor wire is inserted into the laterally long through hole of a conductor terminal having a laterally long through hole formed by two side members, and is pressed from the outer surface of the two side members and is energized for insulation. A method of joining an insulating coated conductor for joining a coated conductor and a conductor terminal, wherein a joining aid is preliminarily attached to a surface on each end side of at least a laterally long through hole of a conductor terminal,
By pressurizing and energizing, the insulating coating of the insulating coated wire is carbonized and the joining aid is melted to form a conductor terminal on the surface of each end of the through hole and a component contained in the joining aid. A method of joining an insulating coated conductor, comprising forming an alloy layer, discharging the carbonized insulating coating from the groove of the conductor terminal, and metal-joining the surfaces of the through holes at the respective end sides through the alloy layer. 10. A joined body of insulating coated conductors manufactured by the method of joining insulating coated conductors according to claim 1.