JPH08195268A - Method and device for soldering - Google Patents

Abstract

PURPOSE: To provide a method and a device for soldering, which can excellently solder a terminal of an electric or electronic part and a wire. CONSTITUTION: In the soldering method for dipping a terminal 41, which is wound with a wire 42, in the solder bath 30 for soldering, during the time of the movement till the terminal 41 is dipped in the solder bath 30 or at the time of dipping, an insulating film of the wire 42 wound around the terminal 41 is damaged. Peeling auxiliary devices 21, 22, which contact with the wire 42 wound around the terminal 41 so as to damage the insulating film, can be provided near the dipping position, in which the terminal 41 is dipped in the solder bath 30. At the time of soldering, since the insulating film of the wire 41 is damaged, melting decomposition of the insulating film is accelerated so as to shorten the soldering time, and the melting decomposition of the insulating film of the wire 41 near the soldering part or the thermal deformation of a winding frame is prevented, and a coil 40 having the excellent characteristic can be easily obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for soldering terminals and electric wires of electric / electronic parts such as transformers, choke coils, inductors and other coils used in electric / electronic equipment. .

[0002]

2. Description of the Related Art Conventionally, in order to solder an electric wire to a coil terminal, an electric wire 42 wound around a coil 40 is used as shown in FIG.
The conductor 41 is exposed by peeling off the insulating film at the end of the conductor 41, the exposed conductor 43 is wound around the terminal 41, and the terminal portion 45 wound with this conductor is immersed in the solder bath 30 in the solder bath 31. I was going.
However, in recent years, for the purpose of streamlining the manufacturing method, a self-brazing insulated wire coated with an insulating film that melts and decomposes in a solder bath and disappears has been developed. In this self-brazing insulated wire, the insulation film is wrapped around the terminal and immersed in a solder bath, so that the heat of the solder bath melts and decomposes the insulation film, and the wire conductor and the terminal are soldered together. To be done.

[0003]

However, in the above-described soldering method using the self-brazing insulated wire, it is necessary to raise the solder bath temperature and prolong the solder bath dipping time. Therefore, as shown in FIG. As described above, in order to prevent the insulation film of the electric wire 41 near the soldering portion from being melted and decomposed by the heat of the solder bath and lowering the insulation property, it is necessary to cover the portion with the insulation auxiliary tube 50, resulting in high cost. became. Further, when the tube 50 was not covered, the insulating film on the soldered portion remained as the residue 60, and it took time and effort to remove it. In addition to this, the winding frame collar portion 70 near the soldering portion is thermally deformed, which may deteriorate the attachment condition of the coil to the electric / electronic device and deteriorate the characteristics of the device. As described above, the soldering of the self-brazing insulated wire has a problem to be solved in terms of productivity and cost.
An object of the present invention is to provide a method and an apparatus for performing good soldering using a self-brazing insulated wire.

[0004]

According to a first aspect of the present invention, in a soldering method in which a terminal on which an electric wire is wound is immersed in a solder bath for soldering, the terminal is moved until it is immersed in the solder bath. Alternatively, the soldering method is characterized in that the insulating film in the portion wound around the terminal of the electric wire is scratched during immersion.

According to the soldering method of the present invention, the insulating film of the electric wire wound around the terminal is scratched to accelerate the melting and decomposition of the insulating film, and the time required for soldering can be shortened. And by shortening this time, the influence of the heat of the solder bath is reduced,
The purpose of the present invention is to prevent melting and decomposition of the insulating coating of the electric wire in the vicinity of the soldered portion, thermal contraction, or thermal deformation of the winding frame in the vicinity of the soldered portion. The timing of scratching the insulating film is
Examples include the case where the electric wire wound around the terminal is in the solder bath, the case where the electric wire moves between the solder baths, and the case where the electric wire goes in and out of the solder bath. If the insulating film is melted or softened, it can be easily scratched. It is preferable to make deep scratches. Even if the scratch reaches the conductor, there is no problem if it is shallow.

A second aspect of the present invention is an apparatus for performing the soldering method according to the first aspect, which has a structure in the vicinity of the locus of movement of a terminal on which an electric wire is wound or in which the terminal is immersed in solder. In the vicinity of the position, a peeling auxiliary device for contacting the portion of the electric wire wound around the terminal and for scratching the insulating film is provided.

In the present invention, it is most preferable that the wire wound around the terminal is heated by the heat of the solder bath and the peeling auxiliary device comes into contact with the wire to damage the insulating film of the wire. A brush-shaped, file-shaped, spiral-shaped, slit-shaped, or the like is applied to the peeling assisting device in a portion in contact with the electric wire. As the material of the peeling assisting device, a material such as titanium, titanium alloy, cast iron, stainless steel, or ceramics having good weather resistance and heat resistance against solder is used. The peeling assisting device is arranged in the solder bath, or on the solder bath when immersed in the solder bath a plurality of times, or in the vicinity of the locus of movement of the terminal on which the electric wire is wound between the solder baths. When the peeling auxiliary device is arranged outside the solder bath, deterioration of the peeling auxiliary device due to solder is suppressed and the life is extended. Further, as the material of the peeling auxiliary device, a material having relatively low weather resistance and heat resistance to solder can be used.
In order to contact the peeling auxiliary device to the electric wire wound around the terminal, either or both of the wire winding portion and the peeling auxiliary device are moved. If the peeling auxiliary device is rotated or vibrated,
A large number of wide open wounds are attached, and the effect is enhanced.

The device of the present invention will be described below in detail with reference to the drawings. FIGS. 1A and 1B are explanatory views showing aspects of the soldering apparatus of the present invention. Soldering device shown in FIG.
10 is a solder bath 30 in which the peeling auxiliary device 20 is held in a solder bath 31.
It was placed inside. Soldering device 11 shown in FIG.
Is a device in which the peeling assisting device 20 is arranged directly above the solder liquid surface of the solder bath 30.

2A and 2B are perspective views showing a state in which the peeling auxiliary device of the device of the present invention scratches the insulating film of the wire wound around the terminal. In the peeling assisting device shown in FIG. 2A, two fixed brushes 21 are arranged to face each other with a predetermined gap. The coil 40 moves between these two fixed brushes 21. When the coil 40 moves, the fixed brush 21 comes into contact with the electric wire 42 wound around the terminal 41 of the coil 40, and the insulating film is damaged. The two fixed brushes 21 are arranged at intervals such that the insulation film of the electric wire 42 wound around the terminals 41 on both sides of the coil 40 is not deeply scratched and the conductor inside the wire is not deeply scratched. In the peeling assisting device shown in FIG. 2B, two rotating brushes 22 are arranged to face each other with a predetermined gap.
In this peeling auxiliary device, since the brush rotates, many scratches are formed on the insulating film and the scratches also spread, so that the melting and decomposition of the insulating film is accelerated. When the coil moves up and down, the distance between the pair of peeling auxiliary devices is variable according to the vertical movement of the coil, and the peeling auxiliary device contacts only the electric wire wound around the terminal, and Avoid contact.

[0010]

According to the invention of claim 1, in a soldering method of immersing a terminal on which an electric wire is wound in a solder bath for soldering, the terminal of the electric wire is moved during or during the movement until the terminal is immersed in the solder bath. Since the insulating film on the part wound around the terminal is damaged, the melting and decomposition of the insulating film is accelerated, and as a result, the time required for soldering is shortened and the melting and decomposition of the insulating film of the wire near the soldered part Thermal deformation of the reel is prevented. In the invention of claim 2, in the vicinity of the locus of movement of the wound terminal of the electric wire, or in the vicinity of the position where this terminal is immersed in the solder bath, the portion wound on the terminal of the electric wire is brought into contact with the insulating film. Since it is a soldering device with a peeling auxiliary device that scratches,
When the soldering part of the coil is in or out of the solder bath, the insulation coating of the wire heated to a high temperature in the solder bath comes into contact with the peeling auxiliary device, and the insulation coating is scratched and melts. Decomposition is accelerated and the same effect as described above is obtained.

[0011]

EXAMPLES The present invention will be described in detail below with reference to examples. (Example 1) A coil terminal on which an electric wire was wound was soldered by using the soldering apparatus shown in FIG. The fixed brush (made of stainless steel) shown in FIG. 2A was used as the peeling auxiliary device. A self-brazing type polyester electric wire (insulating film thickness: 100 μm, conductor diameter: 0.8 mm) wound around a coil winding frame was pulled out for a predetermined length, and this was wound around a terminal for 3 turns. Next, the wound terminal portion of the electric wire was dipped in a solder bath heated to 420 ° C for soldering. While being immersed in the solder bath, a fixing brush was brought into contact with the electric wire of the terminal portion to scratch the insulating film of the electric wire. The depth of the scratch was such that the conductor had a shallow scratch.

(Embodiment 2) The terminal portion of the coil is soldered by the same method as in Embodiment 1 except that the rotating brush (made of stainless steel) shown in FIG. did.

(Embodiment 3) In Embodiment 1, except that the soldering apparatus shown in FIG.
The terminal portion of the coil was soldered by the same method as in Example 1. The terminal portion was dipped once in a solder bath to soften the insulating film, and then contacted with a fixing brush to scratch it, and then dipped again in the solder bath. The fixed brush was arranged at a position of 0 to 10 mm from the surface of the solder bath.

(Embodiment 4) The terminal portion of the coil is soldered by the same method as in Embodiment 3 except that the rotary brush (made of stainless steel) shown in FIG. did.

(Embodiment 5) In Embodiment 1 or 4, the self-brazing type 1-type polyurethane wire (1.0 mmφ) is used as the electric wire.
The terminal portion of the coil was soldered by the same method as in Example 1 except that

(Prior Art 1) The wire winding part of the coil terminal was soldered by the same method as in Example 1 or Example 3 except that the peeling auxiliary device was not used.

In the above-mentioned examples or conventional examples, the solder bath dipping time or the number of times of solder bath dipping for obtaining good soldering was examined. Further, with respect to the coil after soldering, the generation state of film residue, the quality of the electric wire in the vicinity of the soldered portion, and the thermal deformation state of the winding frame collar portion were examined. The results are shown in Table 1.

[0018]

[Table 1]

As is clear from Table 1, the product of the present invention (N
In o.1 to 6), since the soldering time was short, no melt decomposition or heat shrinkage of the insulating film near the soldered part or thermal deformation of the winding frame was observed. Further, the insulating film dust after soldering adhered to the brush and was hardly present on the coil side. Since the brush is made of stainless steel, it can be used for a long time without being corroded even when immersed in a solder bath. In particular, the one arranged on the solder bath has a long life, and the life is about three times that of the one arranged in the solder bath. Soldering is divided into two parts (No.3,4,6)
Shows that the brush was in contact with the wire wound around the terminal after the first immersion in the solder bath, and the insulation film of the wire was damaged, and the second immersion in the solder bath caused the insulation film to disappear and at the same time good soldering was performed. . The one with the brush rotated (No.2,4,6) had better soldering in a shorter time than the one with the brush fixed (No.1,3,5). This is because a large number of scratches with wide wounds were attached and the insulating film disappeared more completely. Polyurethane (one kind) electric wire (No.5,6) had shorter soldering time than polyester electric wire (No.1,3) because the polyurethane of the insulation film was easily melted and decomposed. On the other hand, since the comparative example product did not use the peeling auxiliary device, it took 12 seconds for soldering in No. 7,
In No. 8, immersion in the solder bath for 3 seconds was repeated 4 times. As a result, both of them are affected by the heat of the solder bath, and the insulation coating of the wire near the soldering part melts and decomposes, or heat shrinks, and an auxiliary tube is used to maintain the insulation of that part. Was needed. In addition, the collar portion of the bobbin was significantly deformed, resulting in a defective product. In addition, a large amount of dust remained on the insulating film, which took time to remove.

Although the case where a fixed brush or a rotating brush is used as the peeling assisting device has been described above, according to the present invention, a peeling assisting device in which the portion in contact with the insulating film is a file, a plate, a spiral, etc. The same effect can be obtained by using it in a fixed, rotating, or vibrating manner.

[0021]

As described above, according to the first aspect of the present invention, since the insulating film of the wire wound around the terminal is damaged during soldering, the melting and decomposition of the insulating film is accelerated and the solder is soldered. The soldering time is shortened, melting and decomposition of the insulating coating of the electric wire in the vicinity of the soldered portion and thermal deformation of the winding frame are prevented, and a coil having excellent characteristics can be easily obtained. According to the invention of claim 2, in the device for carrying out the soldering method, the wire wound around the terminal is provided in the vicinity of the locus of movement of the coil terminal or in the vicinity of the position where the terminal is immersed in the solder bath. Since it is a soldering device that is equipped with a peeling auxiliary device that contacts and scratches the insulation film, when the soldering part of the coil is in or out of the solder bath, it is heated to the high temperature of the wire of the soldering part. The insulating film comes into contact with the peeling auxiliary device, the insulating film is scratched, and the melting and decomposition of the insulating film is accelerated, and good soldering is facilitated.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an aspect of a soldering device of the present invention.

FIG. 2 is a perspective view showing a state in which an insulating film of an electric wire wound around a terminal is scratched by a peeling auxiliary device of the device of the present invention.

FIG. 3 is a perspective view showing a conventional manner of soldering an electric wire wound around a terminal.

FIG. 4 is a perspective view of a soldering portion of a conventional coil.

[Explanation of symbols]

 10,11,12── Soldering device 20───── Peeling auxiliary device 21───── Fixed brush 22───── Rotating brush 30───── Solder bath 31───── Solder Bath 40 ───── Coil 41 ───── Terminal 42 ───── Electric wire 43 ───── Conductor 44 ───── Terminal part where the electric wire is wound 45 ───── Winded terminal part 50 ───── Auxiliary tube 60 ───── Insulation film scrap 70 ─────

Claims (2)

[Claims] 1. In a soldering method of immersing a terminal on which an electric wire is wound in a solder bath for soldering, the terminal of the electric wire is wound during movement or during immersion until the terminal is immersed in the solder bath. A soldering method characterized by scratching the insulating film on the exposed portion. 2. A portion of the electric wire wound around the terminal is in contact with the wound portion of the electric wire in the vicinity of the locus of movement of the wound terminal of the electric wire, or near the position where the terminal is immersed in solder, and the insulating film is scratched. A soldering device comprising a peeling auxiliary device for attaching.