JP2740385B2 - Brazing method for insulated conductor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention provides wax insulation coated conductor
Relates with the method, particularly, the insulating coating between conductors such as insulated coated wire, or a separate conductor such as a metal substrate, wax
The present invention relates to a method of electrically and mechanically joining by attaching .

[0002]

2. Description of the Related Art Conventionally, in order to braze an insulated wire and a metal substrate, an insulative thin film material such as a polyurethane resin which is sufficiently melted at a brazing material melting temperature is used as an insulated coating of the insulated wire. Is used. However, in recent years, with the progress of hybridization, high-density mounting, and the like, insulation-coated wires have been required to have sufficient reliability even at higher temperatures. Specifically, considering use in such high temperatures, conventional polyurethane resins and the like are no longer the limit, and high heat-resistant thin film materials such as polyimide resins that can withstand higher temperatures have come to be used. .

[0003] In the case of using such an insulating coating having high heat resistance, there is a method of joining while applying pressure by resistance welding.
In the above method, the wire may be deformed and broken by pressure
There is. Further, since the insulating coating is a brazing material melting temperature is not sufficiently melted, the brazing between conductors after peeling off the insulation coating
Must be attached . That is, a three-step process of removing the insulating coating layer, arranging the exposed conductor at the metal base joint, and brazing the conductors is performed. In the case where the insulating coated wire is a very fine wire, if the insulating peeling layer is peeled off by a mechanical method, there is a concern that the wire may be broken. Therefore, there has been proposed a method of removing only the insulating coating layer using ultraviolet light or laser light. FIG. 16 illustrates a case where a coil element wire is used as an insulated wire. When winding the coil wire c coated with insulation on the coil bobbin b, a stripping section of the insulation coating is provided in the feeding path of the coil wire c, and the insulating coating of the coil wire is irradiated with ultraviolet light r or the like. Then, the insulating coating is removed so that the stripped portion of the insulating coating comes to a predetermined position of the coil wire c wound around the coil bobbin b. This peeling of the insulating coating, the conductor of the coil wire c, the coil terminal t consisting of provided metal conductor portion of the coil bobbin b, becomes Rukoto extinguish brazing.

[0004]

However, in the conventional method of brazing an insulated conductor as described above, the exposed portion of the conductor from which the insulative coating has been peeled is accurately aligned with a predetermined position of the metal substrate to be joined. After that, it is necessary to perform brazing , so that the operation is troublesome, and there is also a problem that the conductor in the insulation-peeled portion is disconnected during the operation.

[0005] Specifically, if the insulating coating peeling range is narrow, the exposed portion of the conductor is also narrowed. Therefore, if the exposed portion of the conductor is not accurately aligned with a predetermined position of the metal base material, the bonding area is reduced. Failure to do so will result in poor electrical and mechanical bonding. In addition, it is technically difficult and time-consuming to accurately dispose the minute exposed portion of the conductor at a predetermined position on the metal base, which impairs productivity. If the range of the insulation coating is widened, the alignment becomes easier, but the strength of the linear conductor, that is, the conductor, is very weak. As a result, there arises a problem that the conducting wire is broken at the exposed portion.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional method, and to easily and surely carry out the work, and to provide a method of brazing an insulated conductor which does not cause disconnection of the conductor. To provide.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, among the brazing methods of an insulated conductor according to the present invention, the method of claim 1 comprises brazing an insulated conductor to another conductor. A conductor supplying step of facing both conductors to be brazed, a coating peeling step of irradiating the insulating coated conductor with light for peeling with the two conductors facing each other, and a step of facing the two conductors. brazing to that brazing the two conductors while being
And the step of receiving the information .

[0008] The insulated conductor is made of copper, aluminum, or other conductive material, and has a linear or other relatively small conductor portion.
It is covered with a high heat resistant material such as a polyimide resin or other insulating materials. Another conductor is a conductor part on the other side that electrically and mechanically joins the insulated conductor.When it is made of the same insulated conductor, it has a different structure from the insulated conductor, such as a metal plate. It may be formed of a conductive material. If the reflectivity of the surface of the other conductor facing the insulated conductor is high, the insulative coating can be removed and removed by reflected light, which will be described later. For this purpose, a highly reflective material may be used as the conductor material, or the surface may be mirror-finished.

The peeling light is light having a high energy, such as ultraviolet light, which is used to modify, decompose, or melt the material of the insulating coating to peel off the insulating coating. If laser light is used as the peeling light,
Higher energy light can be intensively applied only to the necessary area. Specifically, it is preferable to use an excimer laser, a YAG laser, a CO ₂ laser, or the like.

In the conductor supplying step, the insulated conductor and another conductor are opposed to each other in a state where they are joined to each other or in a state close to the state. Although the insulated conductor and another conductor may be in contact with each other, it is easier to remove the insulated coating on the facing portion of the insulated conductor if the insulated conductor is faced at a certain interval. In the stripping step, the insulating coating conductor may be irradiated with light for stripping to remove the insulating coating only in a range necessary for bonding with another conductor, but in a range slightly larger than the bonding range. Then, the insulating coating may be peeled off.
Also, the wider the peeling range, that is, the bonding range, the better the electrical and mechanical bonding.

In the brazing step, the exposed conductor of the insulated conductor and another conductor are electrically and mechanically joined by brazing. The type of brazing material and the processing method may be the same as those of ordinary conductor bonding. For example, as a heating method at the time of brazing, a heat heater, warm air, laser light, or the like can be applied. As another conductor for brazing the insulated conductor, a conductor having a reflective member formed on the surface is used.

The reflecting member is arranged in such a position and shape as to reflect the peeling light and irradiate the reflected light to the insulated conductor. As the reflecting member, a material made of metal or any other material can be used as long as the material can reflect the light for separation. Another conductor brazing the insulation coated conductor, using those forms a substantially U-shaped section, in the conductor feeding process, by surrounding the insulating coated conductor with a conductor of substantially U-shaped section, to face both conductors . In other words, the state is such that the insulated conductor is inserted and arranged at the center of the conductor having a substantially U-shaped cross section.
Is surrounded by another conductor.

[0013] As reflection member, using one made of brazing material, in the brazing step, the two conductors by the reflecting member made of a brazing material can be brazed. As brazing material,
As long as it has a surface property that reflects light for peeling well and a bonding function for bonding the two conductors, a normal brazing material used in conventional brazing can be used.

[0014] In the covering stripping step, the stripping light, in reflection and direct illumination by the reflecting member, and irradiates the insulation coated conductor, in the brazing step, a reflecting member made of a brazing material is heated and melted both conductors Can be brazed
I can . In conductors feed stage can be an insulating coated conductor with another conductor arranged in pairs, wherein in coated release phase, is irradiated simultaneously peeling light to a plurality of insulating coated conductor.

Simultaneous irradiation with peeling light refers to irradiation of a wide range covering a plurality of insulated conductors at the same time, and a narrow range covering only one or a small number of insulated conductors. By irradiating the light for use and quickly moving the irradiation range of the light for peeling, all the insulation-coated conductors may be irradiated with the light for peeling. That is, it is only necessary that a single continuous light irradiation can irradiate a plurality of insulating-coated conductors with light for separation.

In the above method, the brazing of a plurality of pairs of conductors in the brazing step may be performed for each individual pair of conductors, or the plurality of pairs of conductors may be joined together. In addition,
In the present invention, the brazing material is used in a broad sense as a material having solubility and bonding properties that can be electrically and mechanically bonded by melting by means such as heating, and has a relatively high melting temperature. It includes both a low, so-called solder material and a brazing material in a narrow sense having a higher melting temperature than the solder material. Also, the term brazing is used in a broad sense as well, and includes both so-called soldering and brazing in a narrow sense .

[0017]

According to the method of the present invention, the insulating coating removing step
Can brazing process in the same position, or move the conductor is stripped of insulation, since no excessive stress due to an external force or the like exposed portion of the conductor or cause, the brazing process from the insulating coating stripping step This eliminates the trouble of moving the wire, improves productivity, prevents damage to the conductor, and reduces the risk of disconnection.

As another conductor for joining the insulated conductor,
If a material with good surface reflectivity or a material with a reflective member formed on the surface is used, it is possible to irradiate the reflected light to parts where light does not reach by direct irradiation of peeling light only. In addition, it is possible to irradiate the peeling light over a wider range than in the case of direct irradiation alone. As a result, the insulating coating can be stripped by the stripping light in a desired range where the insulating coating needs to be stripped and a wider range of the insulating coated conductor. By changing the shape and arrangement of the conductor or reflecting member that reflects the peeling light, the irradiation range of the peeling light, that is, the insulating coating peeling range can be used without changing the arrangement of the peeling light irradiation device and the insulating coating conductor. Can be easily changed. If the range of peeling of the insulating coating is widened by the action of the reflected light, the bonding area when brazing to another conductor is increased, so that the bonding reliability between the conductors is improved.

When a conductor having a substantially U-shaped cross section surrounds the insulated conductor, the facing area between the conductors increases, so that the joint area can be increased as described above. If the reflecting member is made of a brazing material, the means for reflecting the light for peeling and the joining means for joining the conductors can also be used, so that the material can be saved and the operation can be simplified. it can. Further, the presence of the reflection member does not hinder brazing .

By arranging a plurality of pairs of insulated conductors and other conductors, and by simultaneously irradiating a plurality of insulated conductors with a single irradiation of the exfoliation light, the exfoliation light can be efficiently emitted. It can be used and work efficiency or production efficiency is improved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Example 1 As shown on the left side of FIG. 2, a coil element wire 20, which is an insulating coated conductor, was wound around a coil body 10, and the end of the coil element wire 20 was provided at one end of the coil body 10. after winding the coil terminal 30 is another conductor, as shown on the right side of FIG. 2, according to the brazing material 50, brazing
In, bonding the conductor of the coil wire 20 to the coil terminals 30. At this time, it is necessary to remove the insulating coating from the coil wires 20 facing the coil terminals 30. Therefore, the portion where the coil terminal 30 and the coil element wire 20 face each other is irradiated with laser light 40 or the like serving as peeling light to peel off the insulating coating. The coil wire 20 is cut outside the coil wire 20 joined to the coil terminal 30.

FIG. 1 shows the brazing method of the coil wire 20 in more detail. The coil element wire 2 faces the metal base of the coil terminal 30 made of Al or Cu alloy or the like.
0 was placed. The coil terminal 30 is formed of a highly reflective material having good light reflectivity. Therefore, in this case, the conductor itself becomes the reflecting member. The coil wire 20 is made of Cu
The entire circumference of the conductive wire 22 is covered with an insulating coating 24 such as a polyimide resin. The coil wire 20 was arranged so as to face the coil terminal 30 at a slight distance from the surface of the coil terminal 30.

When the surface of the coil terminal 30 is irradiated with the laser beam 40 from above the coil wire 20, the coil wire 20
Was directly irradiated with the laser beam 40, and the light reflected on the surface of the coil terminal 30 was irradiated on the insulating coating 24 of the coil wire 20, and the insulating coating 24 was peeled off. At this time, the irradiation energy of the laser beam 40 is
Is set to such an extent that the metal material of the coil terminal 30 is not melted and satisfactorily removed. Specifically, about 0.1 to 1.5 J / cm ² is preferable. In addition,
The coil element wire 20 may be at least stripped and removed of at least the insulating coating 24 in the area facing the coil terminal 30, but the laser beam 40 is directly irradiated on the surface on the opposite side of the coil element wire 20. If the insulating coating 24 at this portion is also peeled off, the conductive wire 22 of the coil wire 20 and the coil terminal 3
The bonding area with zero increases. Furthermore, only the direct irradiation of the laser beam 40 may be performed, and the insulating coating 24 on the upper surface side of the coil wire 20 may be simply removed without using the reflected light on the surface of the coil terminal 30.

After a predetermined range of the insulating coating 24 has been peeled off, a brazing material 50 is supplied between the exposed portion of the conductive wire 22 of the coil wire 20 and the surface of the coil terminal 30, and the back surface of the coil terminal 30 is supplied. The conductive wire 22 of the coil element wire 20 and the coil terminal 30 were electrically and mechanically joined by brazing, for example, by heating with a heater 60. The specific procedure and processing conditions for brazing were the same as those for normal conductor bonding.

Thus, the joining of the coil wire 20 to the coil terminal 30 is completed. As the material of the coil terminal 30, various metal materials can be used, but those having good reflectivity as much as possible and excellent in conductor performance are preferable. Specifically, for example, the reflectivity of silver is 28.0% and that of gold is 27.5%, whereas that of copper is 40.4% and that of aluminum is 91.5%. In this respect, copper and aluminum are preferred.

Embodiment 2 In the embodiment shown in FIG. 3, the surface of the coil terminal 30 is made of Al.
Alternatively, a Cu thin film 32 has been formed. This thin film 32
Has good surface reflectivity and serves as a reflective member. Other procedures were performed in the same manner as in Example 1, and good results were obtained. As the material of the thin film 32, the above-described metal material having good reflectivity is used. In this embodiment, the energy of the reflected light is increased by forming the thin film 32 having excellent reflectivity on the surface of the coil terminal 30 without using a material having good reflectivity as the material of the coil terminal 30 itself. Then, the peeling and removal of the insulating coating 24 by the reflected light is efficiently performed, and the peeling area increases. As a result, the bonding area between the conductive wire 22 and the coil terminal 30 also increases, and brazing can be performed satisfactorily, thereby improving the bonding reliability.

The thickness of the thin film 32 is sufficient as long as a metal layer is formed such that light for separation such as the laser light 40 can be reflected well. Specifically, when an excimer laser that emits ultraviolet light is used as the peeling light, 1 μm is used.
m or less. -Example 3-In the example shown in Fig. 4, the surface of the conductor, that is, the surface of the coil terminal 30 is finished to a mirror surface, so that the reflectivity of the surface is enhanced. As the means for mirror finishing, ordinary polishing or the like can be employed.

If the surface has irregularities, as shown in FIG. 4B, secondary reflection and tertiary reflection of the laser light 40 occur, so that the energy of the reflected light is reduced. On the other hand, as shown in FIG. 4A, when the surface is a mirror surface, the higher-order reflection as described above is reduced, and the overall reflectance is improved. For example, incident energy E, reflectance R (R <
In the case of 1), the energy of the reflected light becomes ER in the mirror finish. However, the secondary reflection, if there is a third order reflections and n-th order reflection, energy of the final reflected light from the ER ^n, is the energy of the reflected light becomes extremely small.

In this embodiment, as in the above embodiments,
The peeling effect of the insulating coating 24 due to the reflected light is increased, and the bonding reliability is improved. -Example 4 In the example shown in Fig. 5, a coil terminal 30 as another conductor is formed in a substantially U-shaped cross section, and the coil terminal 30 is surrounded so as to surround the coil element wire 20 as an insulated conductor. Have been placed. The laser light 40 reflected by the U-shaped inner surface of the coil terminal 30 is emitted from around the coil wire 30.
In the brazing step, the brazing material 50 that has been heated and melted is used.
Is set in the U-shaped groove so that the coil element wire 20
Of the conductor 22. The coil wire 20 is
The laser light 40 reflected at the inner surface of the coil terminal 30 is disposed at the center or the focal position of the inner surface curve of the coil terminal 30.
Are collected efficiently. The opening angle of the coil terminal 30 can be freely set in consideration of workability, workability, and the like.

As shown in FIG. 6A, the coil terminals 30
U near the V-shape where the left and right opposing sides of the
In the case of a letter shape, laser light 4
0 is reflected on the inner surface of the coil terminal 30 and the coil wire 20
And the energy efficiency of the peeling light is increased. The insulating coating 24 of the coil wire 20 is irradiated with the laser beam 40 not only from the lower side in the figure but also from the side, so that the insulating coating 24 in a wide range can be peeled off.

The embodiment shown in FIG.
The reflection surface of the coil terminal 30 is configured so that the direct light and the reflected light irradiated to 0 have the same energy. The coil terminal 30 has a U-shape in which left and right opposing sides are parallel. The laser light 40 is emitted between opposing sides of the coil terminal 30. The interval between the opposite sides of the coil terminal 30 is
Becomes the width W ₁ of the coil wire 20 and that the combined sides of the gap 2 × W _2. Therefore, the laser beam 4 having a width of _{W 1}
0 is applied to the coil element wire 20 as direct light. Next, assuming that the reflectance of the surface of the coil terminal 30 is r, the reflected light is 2 × r × W ₂ . Therefore, W ₁ = 2 × r
If the distance between the opposing sides of the coil terminal 30 is set so as to be × W ₂ , light energy can be uniformly applied over substantially the entire circumference of the coil wire 20. In the case of this embodiment, the joining of the coil element wire 20 to the coil terminal 30 by brazing may be performed by pouring a brazing material or a solder material into the coil terminal 30.

Embodiment 6 FIG. 7 shows the structure of an optical system for irradiating a laser beam 40. In FIG. 7A, a laser beam 40 such as an ultraviolet ray is divided into right and left by a mirror 72 having a triangular cross section, each light is reflected by left and right mirrors 73, and condensed by a lens 74, and is converged from two directions. The coil element wire 20 is irradiated. The opening angle and the length of the opposing side of the coil terminal 30 are set so that the laser light 40 from the left and right can be taken in.

In this embodiment, light can be applied to a wide area around the circumference of the coil wire 20, and as a result, the insulating coating 24 in a wide area can be reliably peeled off. Also in FIG. 7B, the laser beam 40 is divided into two directions and irradiated onto the coil element wire 20. However, unlike the embodiment of FIG. 7A, the laser beam 40 is first collected by the lens 74. After being illuminated, the light is split right and left by a mirror 72, and irradiated to the coil element wire 20 by the left and right mirrors 73.

In each of the above embodiments, the laser beam 40 is divided into two directions. However, the laser beam 40 can be divided into three or more directions. In addition, the laser beam 4 having a high energy density
When 0 is reflected by the mirror 72 or the like, it is preferable to use a durable material so that the mirror 72 is not damaged. Example 7 FIG. 8 shows an effect when the laser beam 40 is condensed by the lens 75 and irradiated on the coil element wire 20. As shown in the figure, when a lens 75 having a relatively short focal length is used, the condensing angle の of the laser light 40 becomes large, and even if only direct light is used,
The peeling light can be applied to a wide range from the front surface to the side surface and the back surface of the coil element wire 20.

FIG. 9 shows the focal point of the lens 75 and the coil wire 2.
The difference of the irradiation state by the positional relationship of 0 is shown. FIG.
9A, the focal point f of the lens 75 is located at the position of the coil wire 20, and in FIG. 9B, the focal point f of the lens 75 is
It is slightly before the coil wire 20. The peeled state of the insulating coating 24 is shown below each figure. FIG.
8A, as shown in FIG.
, The insulating coating 24 is peeled and removed over a wide range from the front side to the back side of the coil element wire 20. In FIG. 9B, since the light spreading from the focal point f is irradiated on the coil wire 20, the conductor 2 of the coil wire 20
The insulating coating 24 on the back side, which is shadowed by 2, remains without being removed. However, also in this case, if the reflected light from the coil terminal 30 is used, the insulating coating 24 on the back side can be peeled off.

Thus, the lens 75 and the coil wire 20
By changing the position setting and changing the focal length of the lens 75, it is possible to change the irradiation state of the peeling light to the coil element wire 20, and to adjust the peeling performance of the insulating coating 24. -Example 8-This example is a case where a brazing material is used as a reflection member.

As shown in FIG. 10A, the coil terminals 3
A reflective member layer 34 made of a brazing material such as an Al braze or a Cu braze is formed on a metal substrate of No. 0. Therefore, the laser light 40 is reflected on the surface of the brazing material layer 34 and is irradiated on the coil element wire 20 to peel off and remove the insulating coating 24. Thereafter, when the brazing material layer 34 is heated and melted, the coil terminals 30 and the conductive wires 22 of the coil wires 20 are joined.

In this embodiment, since it is not necessary to supply the brazing material in the brazing step, after the coil wire 20 is supplied and arranged at the predetermined position of the coil terminal 30, the insulating coating 24 is peeled off by the laser beam 40. from, up to about only brazing engineering, it can be carried out efficiently. In FIG. 10B, the thin layer 32 of the metal having good reflectivity described in the second embodiment is formed on the brazing material layer 34. In this case, a material having good reflectivity may not be used as the brazing material layer 34. Further, the thin metal layer 32 is a brazing step, if heated and melted together with the brazing material, not a brazing failure.

Embodiment 9 Next, a more specific embodiment will be described. FIG.
As shown in FIG. 2A, a polyimide wire (15 to 200 μmφ) in which a conductive wire 22 made of copper or the like is covered with an insulating coating 24 made of a polyimide resin is used as the coil wire 20. As shown in FIG. 11B, a coil terminal 30 projecting in a plate shape is provided on the flange 12 at the end of the coil body 10.
Is provided. A coil wire 20 is wound around the coil body 10, and an end of the coil wire 20 is joined to the coil terminal 30. The coil terminal 30 is formed of stainless steel. As shown in FIG. 11C, the coil terminal 30 has a substantially U-shaped cross section. More specifically, the left and right opposed sides are slightly open, and the length of the left and right opposed sides is different to have a cross-sectional shape close to a J-shape.
A brazing material layer 3 made of silver brazing is provided on the inner surface of the coil terminal 30.
4 are formed. The coil wire 20 is shown in FIG.
As shown in (2), after winding several times around the coil terminal 30, the end is inserted and arranged inside the coil terminal 30.

When an ultraviolet laser beam 40 is irradiated from above the coil terminal 30 to peel off and remove the insulating coating 24 of the coil wire 20, and then the brazing material layer 34 is heated and melted by a heat heater or the like. The conductive wire 22 and the coil terminal 30 are joined so that the molten brazing material surrounds the conductive wire 22 of the coil wire 20 at the bottom of the U-shaped coil terminal 30.

-Embodiment 10- This embodiment relates to a case where the coil wires 20 are simultaneously joined to a plurality of coil terminals 30 provided in the coil body 10. As shown in FIGS. 12 (a) to 12 (c),
On one flange 12 of the coil body 10, a pair of coil terminals 30 for joining both ends of the coil wire 20 are provided side by side.

With such a structure, as shown in FIG. 15A, when the cross-sectional shape of the coil terminal 30 is such that the opposing sides are parallel and the gap is relatively narrow, a pair of coil terminals arranged in a straight line In order to peel off and remove the insulating coating 24 of each coil element wire 20 by a single irradiation of the laser beam 40 with respect to the lower coil terminal 30, in particular,
The laser light 40 becomes difficult to reach. Specifically, the dimension of the coil terminal 30 is such that one of the opposing sides has a length of 0.6 mm, the other has a length of 0.3 mm, and the distance between the opposing sides is 0.08 mm. The arrangement interval of 30 is 2.9.
If a mm, the irradiation angle range theta ₁ of the laser beam 40 capable of irradiating the underside of the coil terminals 30 are about 5.7
° very narrow range. Naturally, it is also difficult to irradiate the upper and lower coil terminals 30, 30 simultaneously.

Therefore, a coil terminal 30 as shown in FIGS. 13A and 13B is used. The coil terminal 30 includes a main body 36 having a large area and a bent portion 38 formed by bending the lower end of the center of the main body 36. Near the both ends of the main body 36, a constricted portion 3 around which the coil element wire 20 is wound.
7, 37 are provided. Then, as shown in FIG. 13B, the bent portion 38 is about 45 ° with respect to the main body portion 36.
Are set to form an angle.

When irradiating the laser light 40 to the coil terminal 30 having such a structure, as shown in FIG.
0, 30 alignment direction, ie, flange 1 of coil body
Position 2 is tilted slightly. With this configuration, when the lower coil terminal 30 is irradiated with the laser beam 40, the upper coil terminal 30 does not become an obstacle,
Both of the coil terminals 30, 30 can be satisfactorily irradiated with light for peeling. Apart from this method, as shown in FIG.
Even if the irradiation direction of the laser light 40 is inclined by a certain angle with respect to the coil terminals 30, 30, that is, the flange 12,
An effect similar to the above is achieved.

Further, as shown in FIG. 15B, when the coil terminals 30 having a large opening angle are used, the irradiation angle range θ of the laser beam 40 can be obtained even under the same conditions as in FIG. ₂ becomes approximately 38 °. Therefore, even if the directions of the coil terminals 30 and 30 and the laser beam 40 are inclined to some extent, the irradiation of the coil strand 20 with the peeling light can be performed without any problem.

According to the above-described embodiment, it is possible to simultaneously irradiate a plurality of pairs of coil wires 20, ie, the insulated conductors, and the coil terminals 30, 30, ie, another conductor, with light for peeling. wax insulation coated conductor in
Attachment can be performed reliably and efficiently.

[0047]

According to the method for brazing an insulated conductor according to the present invention described above, the insulating layer peeling step and the brazing step of the insulated wire can be performed at the same position, and the stripped portion of the insulated coating can be removed. Electrical and mechanical joining can be performed easily and reliably by brazing the conductors without moving the insulated wire for alignment of the joining portion.

If a reflecting member is used or another conductor having a substantially U-shaped cross section is used, the insulating coating can be efficiently stripped over a wide range of the insulating coated wire without moving the insulating coated wire. Removal can be performed, and the bonding area between the conductors can be increased, thereby further improving the bonding reliability and improving the work efficiency and productivity.

In the present invention, the conductors are brazed to each other.
Because it is joined by a mechanical
It does not give any mental stress. Conductor is composed of thin wire
In conventional crimping, the conductor is pushed
In some cases, it was crushed or broken.
In the method of the present invention, even if a very fine wire is used for the conductor, it is completely damaged.
Don't worry.

[Brief description of the drawings]

FIG. 1 is a schematic process drawing showing an embodiment of the present invention.

FIG. 2 is a schematic process diagram when brazing a coil wire.

FIG. 3 is a schematic process drawing showing another embodiment.

FIG. 4 is a schematic explanatory view illustrating an effect due to a difference in surface texture.

FIG. 5 is a schematic process drawing showing another embodiment.

FIG. 6 is a schematic structural view of a coil terminal showing another embodiment.

FIG. 7 is a schematic structural view of an optical system showing a laser beam irradiation method.

FIG. 8 is an explanatory diagram showing an effect by a focal length of a lens.

FIG. 9 is an explanatory diagram showing a difference in effect depending on a focal position of a lens.

FIG. 10 is a schematic structural view showing another embodiment.

FIG. 11 is a schematic structural view showing another embodiment.

FIG. 12 is a schematic structural view showing another embodiment.

FIG. 13 is a structural diagram of a coil terminal.

FIG. 14 is an explanatory diagram showing a laser beam irradiation method.

FIG. 15 is an explanatory diagram showing a difference in effect depending on the structure of the coil terminal.

FIG. 16 is a schematic explanatory view showing a conventional technique.

[Explanation of symbols]

 Reference Signs List 20 Coil strand (insulated conductor) 22 Conductor 24 Insulation coating 30 Coil terminal (different conductor) 40 Laser light (light for peeling)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Kuwata 1048, Kadoma, Kadoma, Osaka Pref.Matsushita Electric Works, Ltd. References JP-A-3-210783 (JP, A) JP-A-57-153419 (JP, A) JP-B-58-41942 (JP, B2)

Claims (4)

(57) [Claims] 1. A method of brazing an insulated conductor to another conductor, wherein said another member has a reflective member formed on a surface thereof and has a substantially U-shaped cross section.
A conductor, a conductor supplying step of facing both conductors by surrounding the insulated covered conductor, and a covering peeling step of irradiating the insulated covered conductor with peeling light in a state where the two conductors face each other; Brazing the two conductors in a face-to-face state. 2. The method according to claim 1 , wherein a brazing material is used as the reflecting member, and in the brazing step, both conductors are brazed with the reflecting member made of the brazing material. . 3. A according to claim 2 method, in the coating peeling step, the peeling light, in reflection and direct illumination by the reflecting member, and irradiates the insulation coated conductor, in the brazing step, consisting of a brazing material A method of brazing an insulated conductor by heating and melting a reflecting member to braze both conductors. 4. A method according to any one of claims 1 to 3, in the conductor feeding process, the insulation coated conductor with another conductor arranged in pairs, with the coating peeling step, a plurality of pairs of insulation coating A method of brazing an insulated conductor by simultaneously irradiating the conductor with light for peeling.