JP2009178743A - Method for connecting square covered wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for connecting a square covered wire, with which deformation of the square covered wire is suppressed and its manufacturing process can be simplified. <P>SOLUTION: In the method, a conductive member and a square covered wire in which a square wire is covered by an insulating film are pressed so that the conductive member is brought into contact with a part of the insulation film, and the current is supplied to the conductive member for heat generation to connect the conductive member to the square wire of the square covered wire. The pressurization condition and the energization condition are set to a condition to sublimate the insulation film. The region of the insulation film in contact with the conductive member is removed by sublimation, and the square wire is connected to the conductive member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for connecting a conductive member and a rectangular covered electric wire.

Conventionally, as shown in Patent Document 1, for example, a method has been proposed in which a conductive member having a substantially U-shaped cross section and an insulated coated electric wire covered with an insulating coating are energized while being energized. . In Patent Document 1, a conductive member is formed by connecting a base and a folded portion facing the base by a bent portion, and the base and the folded portion are sandwiched between the base and the folded portion with an insulation-coated electric wire sandwiched between them. Is pressed by a pair of electrodes. In this pressurized state, a current is passed through the conductive member by the pair of electrodes, thereby causing the conductive member to generate heat, and this heat is transmitted to the insulating coating of the insulated coated electric wire held between the conductive members. Then, the insulating coating softened by the heat and the applied pressure is caused to flow from the contact portion with the conductive member, and the conductive member and the bare electric wire are connected.
Japanese Patent Application Laid-Open No. 11-114674

  By the way, in the case of an insulation coated electric wire (hereinafter referred to as a square covered electric wire) in which an electric wire having a rectangular cross section (hereinafter referred to as a square electric wire) is coated with an insulating coating, Since the contact area between the conductive member and the rectangular covered electric wire is wider than that of the insulating covered electric wire having a circular shape, the pressure acting on the rectangular covered electric wire via the conductive member is reduced. Therefore, a stronger force must be applied to cause the insulating coating to flow. For this reason, there exists a problem that a square-shaped electric wire will deform | transform, the cross-sectional area will reduce, and mechanical strength will fall.

  Therefore, conventionally, a part of the insulating coating on the square covered electric wire is removed in advance by a mechanical or chemical method, and then the portion where the insulating coating is removed and the electric wire is exposed is connected to the conductive member. The method is generally adopted. However, this method increases the number of steps of removing a part of the insulating coating in the square-shaped covered wire in advance. Furthermore, since the square electric wire is partially removed together with the insulating coating, the cross-sectional area of the square electric wire connected to the conductive member is reduced, resulting in a problem that the mechanical strength is lowered.

  Then, in view of the said problem, this invention aims at providing the connection method of the square covering electric wire which can suppress a deformation | transformation of a square electric wire and can simplify a manufacturing process.

  In order to achieve the above-mentioned object, the invention according to claim 1 is configured such that the conductive member and the rectangular covered electric wire in which the rectangular electric wire is covered with the insulating coating are in contact with a part of the insulating coating. Is a method for connecting a rectangular covered electric wire to connect a conductive member and a rectangular electric wire by causing a current to flow through the conductive member and generating heat. Thus, the portion of the insulating film that contacts the conductive member is removed by sublimation, and the square electric wire and the conductive member are connected.

  As described above, according to the present invention, the insulating coating is removed by sublimation by setting the pressurization / energization condition to be a condition for the insulating coating to sublime. That is, it is not necessary to apply a force that allows the insulating coating softened by heat to flow by pressurization. Therefore, the applied force can be reduced as compared with the conventional method, and deformation of the rectangular electric wire due to pressurization can be suppressed. In addition, since the applied force is smaller than in the conventional case, the contact resistance between the electrode through which a current flows through the conductive member and the conductive member is increased, thereby increasing the amount of heat generated. That is, the insulating film can be efficiently sublimated by the heat transmitted from the conductive member. In addition, since it is not necessary to remove a part of the insulating coating in advance, a part of the rectangular electric wire connected to the conductive member is not removed together with the insulating coating, and the mechanical strength of the rectangular electric wire connected to the conductive member is removed. Is secured. This can also suppress the deformation of the rectangular electric wire. Furthermore, since it is not necessary to remove a part of the insulating film in advance, the manufacturing process can be simplified.

  In the first aspect of the present invention, as described in the second aspect, it is preferable that the pressurization / energization condition is a condition in which the temperature of the conductive member is equal to or higher than the sublimation temperature of the insulating coating. It is difficult to measure the temperature of the insulating film that sublimes, but instead, the insulating film is measured by measuring the temperature of the conductive member that is adjacent to the insulating film and is also a heat source for the insulating film. Can be considered (guaranteed) as sublimated.

  In particular, as described in claim 3, when the pressurization / energization condition is such that the temperature of the conductive member is greater than the sublimation temperature of the insulating coating, the conductive member can be reliably maintained at a temperature equal to or higher than the sublimation temperature for a predetermined time. it can. That is, the insulating coating is easily sublimated. Therefore, it is possible to improve the reliability of guarantee for the sublimation of the insulating coating.

  In the invention according to claim 2 or claim 3, as described in claim 4, the pressurization / energization condition is set such that the temperature of the conductive member is less than the melting point of the material constituting the conductive member. It is preferable to do.

  According to this, deformation of the conductive member due to heat can be suppressed. Moreover, since the material which comprises a square electric wire is generally comprised using the material whose melting | fusing point is higher than the material which comprises a electrically-conductive member, the deformation | transformation of the square electric wire by heat can also be suppressed.

  In the invention according to any one of claims 1 to 4, as described in claim 5, the conductive member is formed by connecting a base portion and a folded portion facing the base portion by a bent portion, and the base portion and the folded portion. The conductive member may be in contact with a part of the insulating coating by pressurizing the base portion and the folded portion in a state where the square covered electric wire is sandwiched between the conductive portion and the base portion.

  According to this, since the conductive member has the bent portion, the current concentrates on the bent portion and locally generates heat. Thereby, heat can be efficiently transferred to the insulating coating in contact with the conductive member.

  In the invention according to any one of claims 1 to 5, as described in claim 6, the conductive member and the square covered electric wire may be pressurized by a pair of electrodes for passing a current through the conductive member. . According to this, it is possible to pressurize the conductive member and the rectangular covered electric wire with the pair of electrodes and to pass a current through the conductive member. Therefore, the apparatus configuration for connecting the conductive member and the rectangular electric wire can be simplified.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view showing a connection structure of square covered electric wires obtained by the connection method according to the first embodiment. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in FIGS. 1 and 2, the rectangular covered electric wire 10 is obtained by covering the periphery of an electric wire 11 having a rectangular cross section (hereinafter referred to as a square electric wire 11) with an insulating coating 12. 20 and integrated.

The rectangular electric wire 11 is made of a conductive material, and a part thereof is directly connected (joined) to the conductive member 20. In the present embodiment, the rectangular electric wire 11 is formed using a material having a melting point higher than the sublimation temperature of the material constituting the insulating coating 12 (for example, copper having a melting point of 1083 ° C.). The rectangular electric wire 11 has a cross-sectional rectangular shape with a cross-sectional area of about 0.001 to 0.08 mm ² and an aspect ratio of about 1: 1 to 1: 5 (in this embodiment, a cross-sectional rectangle is illustrated). It is a thin line.

  The insulating coating 12 is made of a synthetic resin and covers a portion of the surface of the rectangular electric wire 11 excluding a connection portion with the conductive member 20. In the present embodiment, the insulating coating 12 uses a material having a sublimation temperature lower than each melting point temperature of the constituent material of the rectangular electric wire 11 and the constituent material of the conductive member 20 (for example, polyamideimide having a sublimation temperature of about 580 ° C.). Is formed. Moreover, the insulating coating 12 has a substantially uniform thickness around the square electric wire 11 and specifically has a thickness of about 5 to 15 μm. Further, in the rectangular electric wire 11, a portion excluding a part of the long surface 11 a including the long side of the rectangular cross section and a part of the back surface 11 b of the long surface 11 a is covered with the insulating coating 12.

  The conductive member 20 is a terminal for electrically connecting the rectangular covered electric wire 10 (square electric wire 11) and another member, and a part of the conductive member 20 is exposed after the insulating coating 12 is removed. It is directly connected (joined) to a part of the rectangular electric wire 11. In the present embodiment, the conductive member 20 is a material having a melting point temperature higher than the sublimation temperature of the material constituting the insulating coating 12 and lower than the melting point temperature of the material constituting the rectangular wire 11 (for example, the melting point temperature). Is formed using 905 ° C. brass). As shown in FIGS. 1 and 2, as the conductive member 20, a conductive member having a substantially U-shaped cross section in which a base portion 21 and a folded portion 22 facing the base portion 21 are connected by a bent portion 23 is employed. is doing. With respect to the conductive member 20 having a substantially U-shaped cross section, the rectangular electric wire 11 has a rectangular shape so that the long surface 11a including the long side of the rectangular cross section faces the base portion 21 and the long surface 11b faces the folded portion 22. The covered electric wire 10 is disposed in the vicinity of the bent portion 23. Then, the rectangular covered electric wire 10 is sandwiched between the base 21 and the folded portion 22, and the longitudinal surface 11 a of the rectangular electric wire 11 is connected (joined) to the base 21 at this sandwiched portion, and the longitudinal surface 11 b is coupled to the folded portion 22. Connected (joined).

  Next, a method for connecting the rectangular covered electric wire 10 to the conductive member 20, which is a feature of the present embodiment, will be described. FIG. 3 is a flowchart for explaining the connection method. 4A and 4B are cross-sectional views for explaining the connection method, in which FIG. 4A is a pressurized state, FIG. 4B is a pressurized / energized state before the insulating coating is sublimated, ) Shows a state where the insulating coating is sublimated in a pressurized and energized state. FIG. 5 is a diagram illustrating a relationship between energization of the conductive member and a temperature change of the conductive member.

  In connecting the rectangular covered electric wire 10 to the conductive member 20, first, the conductive member 20 having a substantially U-shaped cross section is placed on one electrode 30 of the paired electrodes 30, 31, and the outer surface of the base portion 21 is abutting surface Place as. The electrode 30, together with the electrode 31, not only allows a current to flow to the conductive member 20, but also serves as a support base for the conductive member 20. And the square covered electric wire 10 is arrange | positioned so that the longitudinal surface 11a may oppose on the inner surface (surface facing the folding | returning part 22) of the base 21. FIG. At this point, the insulating coating 12 covers the entire square electric wire 11, and there is no portion of the square electric wire 11 that is exposed. The above is the preparation process.

  After completion of the preparation process, pressurization is performed as shown in FIG. 3 (step 10). In this pressurization, as shown in FIG. 4A, the electrode 31 is brought into contact with the outer surface side of the folded portion 22, and the electrode 31 applies a force to the folded portion 22 toward the electrode 30 (FIG. 4A). Add the white arrow). Accordingly, the folded portion 22 approaches (displaces) the base portion 21, and the square covered electric wire 10 is sandwiched between the base portion 21 and the folded portion 22. In the present embodiment, a constant force is applied to the folded portion 22, and the pressure force is weak enough to contact the conductive member 20 and the square covered electric wire 10 (insulating coating 12) (for example, about 3 kgf). And

  And in the pressurized state, as shown in FIG. 3, electricity supply is implemented (step 20). In this energization, a voltage is applied between the pair of electrodes 30 and 31 while maintaining a pressurized state, and a current is passed between the electrodes 30 and 31 via the conductive member 20 as shown in FIG. Shed. Thereby, the conductive member 20 generates heat. In the present embodiment, a current (see a solid arrow in FIG. 4B) flows from the electrode 31 to the electrode 30 through the folded portion 22, the bent portion 23, and the base portion 21 of the conductive member 20. . Therefore, since the current path between the base portion 21 and the folded portion 22 is only the bent portion 23, the bent portion 23 where current is concentrated can be locally heated. Further, as described above, since the applied pressure is weak and the contact resistance between the conductive member 20 and the electrodes 30, 31 is increased, heat is effectively generated at the contact portion between the conductive member 20 and the electrodes 30, 31. be able to. Therefore, as shown in FIG. 5, the temperature of the conductive member 20 rises from the start of energization, and heat is transferred from the conductive member 20 to the insulating coating 12 of the rectangular covered electric wire 10, so the temperature of the insulating coating 12 also rises.

  In the present embodiment, as shown in FIG. 5, a large current is not applied to the conductive member 20 from the beginning, but the current value is gradually increased. This is because if the contact state between the electrodes 30 and 31 and the conductive member 20 is local, the current is concentrated and the conductive member 20 and the like may be damaged.

  In the present embodiment, the temperature of the conductive member 20 is measured in the above-described pressurization / energization state. Then, as shown in FIG. 3, it is determined whether or not the insulating coating 12 has sublimated depending on whether or not the temperature of the conductive member 20 has become equal to or higher than the sublimation temperature of the insulating coating 12 (step 30). In step 30, if the measured temperature is equal to or higher than the sublimation temperature, the energization is terminated as the insulating coating 12 is sublimated (step 40). In this embodiment, as shown in FIG. 5, the energization is terminated when the temperature of the conductive member 20 reaches the sublimation temperature.

  Thus, in this embodiment, pressurization / energization is performed so that the temperature of the conductive member 20 is equal to or higher than the sublimation temperature of the insulating coating 12. As a result, the temperature of the sandwiched portion of the insulating coating 12 adjacent to the conductive member 20 also rises to a temperature at which the insulating coating 12 sublimes due to heat transfer from the conductive member 20. Therefore, a portion of the insulating coating 12 sandwiched between the longitudinal surface 11a and the base portion 21 of the rectangular electric wire 11 and a portion sandwiched between the longitudinal surface 11b and the folded portion 22 are removed by sublimation. The That is, in the rectangular electric wire 11, a portion facing the base portion 21 in the longitudinal surface 11a and a portion facing the folded portion 22 in the longitudinal surface 11b are exposed. Moreover, since the pressurization state by the electrodes 30 and 31 is maintained, the part which became the exposed state in the electrodes 30 and 31 and the square-shaped electric wire 11 contacts. As a result, as shown in FIG. 4C, a current also flows from the electrode 31 to the electrode 30 via the folded portion 22 of the conductive member 20, the rectangular electric wire 11, and the base portion 21. Therefore, the longitudinal surface 11a and the base portion 21, and the longitudinal surface 11b and the folded portion 22 of the rectangular electric wire 11 are connected (diffusion joined) by resistance welding (Joule heat).

  Here, sublimation of the insulating coating 12 starts from a temperature slightly lower than the sublimation temperature. Therefore, even when the energization is terminated when the temperature of the conductive member 20 reaches the sublimation temperature of the insulating coating 12, the insulating coating 12 can be sublimated within a predetermined time range including the time when the temperature reaches the sublimation temperature. it can. Therefore, especially when the rectangular coated electric wire 10 is a thin wire, the rectangular electric wire 11 and the conductive member 20 can be connected with a part of the rectangular electric wire 11 exposed. Thus, in this embodiment, in Step 30, it is determined whether or not the insulating coating 12 has sublimated and the rectangular electric wire 11 and the conductive member 20 are connected.

  As described above, the insulating coating 12 can be sublimated even after the energization is completed. Further, immediately after the sublimation of the insulating coating 12, the rectangular electric wire 11 and the conductive member 20 are joined. Therefore, after the energization is finished in step 40, the pressurization is finished (step 50). As described above, the connection structure between the rectangular covered electric wire 10 and the conductive member 20 shown in FIGS. 1 and 2 can be obtained.

  Thus, according to the connection method of the rectangular covered electric wire 10 according to the present embodiment, the insulating coating 12 is removed by sublimation, so that the force applied is between the conductive member 20 and the rectangular covered electric wire 10 (insulating coating 12). It may be weak enough to make contact. That is, as shown in the conventional connection method, it is not necessary to apply a force (about 10 kgf) enough to cause the conductive member softened by heat to flow by pressurization. Therefore, deformation of the rectangular electric wire 11 due to pressurization can be suppressed. In addition, since a part of the insulating coating 12 does not have to be removed in advance, a part of the rectangular electric wire 11 connected to the conductive member 20 is not removed together with the insulating coating 12 but is a square connected to the conductive member 20. The mechanical strength of the electric wire 11 is ensured. Also by this, the deformation | transformation of the square-shaped electric wire 11 by pressurization can be suppressed. In particular, when the rectangular electric wire 11 is a thin wire having a rectangular cross section as shown in the present embodiment, deformation can be effectively suppressed. In addition, since the force to apply is small compared with the past, the bending of the bending part 23 in the electrically-conductive member 20 can also be suppressed. That is, breakage of the bent portion 23 can be suppressed.

  In addition, since the applied force is smaller than the conventional force, as described above, the contact resistance between the conductive member 20 and the electrodes 30 and 31 can be increased, and the amount of heat generated at the contact portion can be increased. That is, the insulating coating 12 can be efficiently sublimated by the heat transferred from the conductive member 20. Similarly, since the applied force is smaller than in the conventional case, the contact resistance between the rectangular electric wire 11 and the conductive member 20 which are exposed by sublimation of the insulating coating 12 is increased, and the rectangular electric wire 11 and the conductive member 20 are Joule heat at the contact portion can be increased. That is, the time for resistance welding of the rectangular electric wire 11 and the conductive member 20 can be shortened. Moreover, since it is not necessary to remove a part of insulating film 12 previously like the conventional method, a connection process can be simplified.

  Further, in the present embodiment, when the temperature of the conductive member 20 adjacent to the insulating coating 12 reaches the sublimation temperature of the insulating coating 12, the energization to the conductive member 20 is terminated. Thereby, it can suppress that the temperature of the electrically-conductive member 20 rises excessively, and can suppress the deformation | transformation of the electrically-conductive member 20 and the square-shaped electric wire 11 by a heat | fever. Further, even when the energization is terminated when the temperature of the conductive member 20 reaches the sublimation temperature of the insulating coating 12, the rectangular covered electric wire 10 is a thin wire and the insulating coating 12 is thin. Can be sublimated.

  In the present embodiment, brass is adopted as the material constituting the conductive member 20, and polyamideimide is adopted as the material constituting the insulating coating 12. The energization is terminated when the temperature of the conductive member 20 reaches the sublimation temperature of the insulating coating 12. Therefore, since the melting point temperature (905 ° C.) of the conductive member 20 is sufficiently higher than the sublimation temperature of polyamideimide (approximately 580 ° C.), deformation of the conductive member 20 due to heat can be suppressed. In the present embodiment, copper having a melting point higher than that of brass is adopted as a material constituting the rectangular electric wire 11. Thereby, the deformation | transformation of the square-shaped electric wire 11 by heat can also be suppressed.

In the present embodiment, the conductive member 20 has a substantially U-shaped cross section. Therefore, the bent portion 23 where the current concentrates can locally generate heat, and heat can be efficiently transferred to the insulating coating 12 in contact with the conductive member 20.
In the present embodiment, the conductive member 20 is energized while the conductive member 20 and the square covered electric wire 10 are pressurized by the pair of electrodes 30 and 31. Therefore, the apparatus configuration for connecting the conductive member 20 and the rectangular electric wire 11 can be simplified.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the present embodiment, an example is shown in which, when the temperature of the conductive member 20 reaches the sublimation temperature of the insulating coating 12 in step 30 shown in FIG. However, as shown in FIG. 6, the energization may be terminated when the temperature of the conductive member 20 reaches a temperature higher than the sublimation temperature of the insulating coating 12 and lower than the melting point temperature of the conductive member 20. Good. Thereby, the time range in which the insulating coating 12 can be sublimated can be expanded. That is, the insulating coating 12 can be surely sublimated as compared with a method in which energization is terminated when the temperature of the conductive member 20 reaches the sublimation temperature. That is, the connection reliability between the rectangular electric wire 11 and the conductive member 20 can be improved. In addition, before the temperature of the conductive member 20 reaches the melting point temperature of the conductive member 20, the energization to the conductive member 20 is terminated, so that the deformation of the conductive member 20 due to heat is suppressed. FIG. 6 is a diagram illustrating a relationship between energization of the conductive member and a temperature change of the conductive member in a modification of the connection method.

  Moreover, in this embodiment, the example which determines whether the insulating coating 12 was sublimated by measuring the temperature of the electrically-conductive member 20 adjacent to the insulating coating 12 was shown. However, the method for determining whether the insulating coating 12 has sublimated is not limited to the above example. For example, sublimation of the insulating coating 12 may be determined by measuring the temperature of the insulating coating 12 with a radiation thermometer or the like. In addition, the sublimation of the insulating coating 12 may be determined from other conditions.

  Moreover, in this embodiment, the example which is about 3 kgf was shown as the strength of the force which pressurizes the folding | returning part 22 toward the electrode 30 side by the electrode 31. FIG. However, the strength of the pressurizing force is not limited to the above example as long as it is sufficient to maintain the contact between the conductive member 20 and the square covered electric wire 10 (insulating coating 12).

  In the present embodiment, an example in which the number of the rectangular covered electric wires 10 connected to the conductive member 20 is one is shown. However, the number of the rectangular covered electric wires 10 connected to the conductive member 20 may be plural.

  Moreover, in this embodiment, the example which employ | adopts the material whose melting | fusing point temperature is higher than the sublimation temperature of the insulating film 12 as a constituent material of the square wire 11 was shown. However, any material that has conductivity and is directly connected to the conductive member 20 is not limited to the above example, and can be appropriately adopted. However, in order to suppress deformation of the rectangular electric wire 11 due to heat, it is preferable to employ a material having a melting point temperature sufficiently higher than the sublimation temperature of the insulating coating 12 as a constituent material of the rectangular electric wire 11.

Moreover, in this embodiment, as the rectangular electric wire 11, a cross-sectional area is about 0.001 to 0.08 mm ² , and a thin wire having a rectangular cross section with an aspect ratio of about 1: 1 to 1: 5 is adopted. An example is shown. However, the rectangular electric wire 11 is not limited to the above-described example as long as it has a rectangular cross section, and can be appropriately adopted.

  Moreover, in this embodiment, the example which employ | adopts the material whose melting | fusing point temperature is higher than the sublimation temperature of the insulating coating 12, and below the melting point temperature of the square-shaped electric wire 11 as a constituent material of the electrically-conductive member 20 was shown. However, the material is not limited to the above example as long as it is a material that has conductivity and is directly connected to the rectangular electric wire 11, and can be appropriately adopted. However, in order to suppress deformation of the conductive member 20 due to heat, it is preferable to employ a material having a melting point temperature sufficiently higher than the sublimation temperature of the insulating coating 12 as a constituent material of the conductive member 20.

  Moreover, in this embodiment, the example which employ | adopts the thing of a cross-sectional substantially U shape as the electrically-conductive member 20 was shown. However, the shape of the conductive member 20 is not limited to the above example, and for example, a flat plate shape can be adopted.

  Moreover, in this embodiment, the example which employ | adopts the electrodes 30 and 31 which make a pair as a member which pressurizes the electrically-conductive member 20 and the square-shaped covered electric wire 10, and flows an electric current through the electrically-conductive member 20 was shown. However, the member that pressurizes and energizes is not limited to the above example, and the operation of pressurizing and energizing may be performed by different members. However, in this case, the device configuration for connecting the conductive member 20 and the rectangular electric wire 11 is complicated. Therefore, as shown in the above example, it is preferable to pressurize and energize the electrodes 30 and 31 that make a pair.

  Further, in the present embodiment, an example is shown in which current flows from the electrode 31 to the electrode 30 through the folded portion 22, the bent portion 23, and the base portion 21 of the conductive member 20. However, a current may flow from the electrode 30 to the electrode 31 via the base portion 21, the bent portion 23, and the folded portion 22 of the conductive member 20.

It is a perspective view which shows the connection structure of the square covering electric wire obtained by the connection method which concerns on 1st Embodiment. It is sectional drawing which follows the II-II line | wire of FIG. It is a flowchart for demonstrating a connection method. It is sectional drawing for demonstrating the connection method, (a) is the state which pressurized, (b) is a pressurization and electricity supply state, (a) is a state before sublimation of an insulating film, (c) -It shows a state in which the insulating film is sublimated in the energized state. It is a figure which shows the relationship between the electricity supply to a conductive member, and the temperature change of a conductive member. In the modification of a connection method, it is a figure which shows the relationship between the electricity supply to a conductive member, and the temperature change of a conductive member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Square-shaped covered electric wire 11 ... Square-shaped electric wire 12 ... Insulating coating 20 ... Conductive member 23 ... Bending part 30, 31 ... Electrode

Claims (6)

Pressurizing a conductive member and a rectangular covered electric wire covered with a rectangular electric wire with an insulating coating so that the conductive member is in contact with a part of the insulating coating, and causing a current to flow through the conductive member to generate heat. According to the connection method of the rectangular covered electric wire for connecting the conductive member and the rectangular electric wire,
By making the pressurization / energization conditions sublimate the insulating coating, the portion of the insulating coating that contacts the conductive member is removed by sublimation, and the square wire and the conductive member are connected. A method for connecting square-shaped covered electric wires characterized by the above.   2. The method of connecting square-shaped covered electric wires according to claim 1, wherein the pressurization / energization condition is a condition in which a temperature of the conductive member is equal to or higher than a sublimation temperature of the insulating coating.   The method of connecting square-shaped covered electric wires according to claim 2, wherein the pressurizing and energizing conditions are such that the temperature of the conductive member is higher than the sublimation temperature of the insulating coating.   4. The connection of the rectangular covered electric wire according to claim 2, wherein the pressurization / energization condition is a condition in which a temperature of the conductive member is lower than a melting point of a material constituting the conductive member. Method. The conductive member is formed by connecting a base portion and a folded portion facing the base portion by a bent portion,
The conductive member is in contact with a part of the insulating film by pressurizing the base and the folded portion in a state where the rectangular covered electric wire is sandwiched between the base and the folded portion. The connection method of the square-shaped covered electric wire of any one of Claims 1-4.   The square covered electric wire according to any one of claims 1 to 5, wherein the conductive member and the square covered electric wire are pressurized by a pair of electrodes for causing a current to flow through the conductive member. Connection method.

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