JPH06141432A - Device for eliminating insulation covering of conductor - Google Patents

Abstract

PURPOSE:To obtain a device for removing the insulation covering of a conductor which can be easily applied to a minute part and also cope with the insulation covering with high heat resistance by fusing the insulation covering covering the conductor with carbon dioxide gas laser beams for removing it. CONSTITUTION:Coil parts 5 are fixed using a tool 8 so that a conductor 6 for removing an insulation covering can be positioned at an irradiation spot position where carbon dioxide gas laser is focused by an optical system part 3 while the discharge of a carbon dioxide gas laser oscillator 1 is stopped. Then, an electromagnetic valve 12 is operated for starting spraying assist gas to the application spot of the carbon dioxide gas laser from a nozzle 9, a signal is fed to the power supply of the carbon gas laser oscillator 1 and a control part 2 for oscillating the oscillator 1 for a certain period of time to remove the insulation covering of the conductor 6, and the spray of assist gas is stopped after the application of carbon gas laser ends. The carbon gas laser beam can easily be absorbed by a carbon compound used for the insulation covering and cannot be absorbed by a metal easily, thus easily removing the covering only.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating film removing device for a conductive wire used for removing an insulating film coated on a conductive wire used in electronic parts and the like.

[0002]

2. Description of the Related Art Inductors, voice coils for speakers,
When manufacturing a coil component such as a motor, it is necessary to connect the end of the coil conductive wire to a terminal by soldering or welding in order to establish electrical continuity between the coil portion and the outside. However, the conductive wire used for the coil is usually covered with an insulating coating so as not to be conductively short-circuited with the adjacent conductive wire in the coil, and soldering cannot be performed without removing the insulating coating.

For this reason, conventionally, a method of removing the insulating coating by utilizing heat at the time of soldering, a method of mechanically performing by sandblasting, or a chemical of swelling or melting the insulating coating by using a chemical or the like is used. Have been used.

[0004]

However, the above-mentioned conventional method utilizing heat during soldering has a problem that a material having high heat resistance cannot be used for the insulating coating.
In addition, the mechanical and chemical methods require an insulating coating when the coil parts are downsized.Since the insulating coating on the coil is damaged, it cannot be used and a cleaning process is required. Therefore, there is a problem that the production equipment becomes large.

The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide an insulating film removing device for a conductive wire, which is simple and can be applied to a minute portion and can cope with an insulating film having high heat resistance. It is a thing.

[0006]

In order to solve the above-mentioned problems, a device for removing an insulating film from a conductor according to the present invention is a carbon dioxide gas laser oscillator connected to a power source and a control unit for controlling the power source, and radiated from this carbon dioxide gas laser oscillator. An optical system portion for condensing the carbon dioxide laser light to be generated, a nozzle coupled to the optical system portion, and a table portion for positioning and fixing a conductive wire with an insulating coating or an electronic component using the conductive wire under the nozzle. In this configuration, the insulating film coated on the conductor is removed.

[0007]

With this configuration, the lead wire or the electronic component using the lead wire which is positioned and fixed at the position where the carbon dioxide laser light is focused is easily absorbed by the carbon compound used for the insulating coating, and the carbon dioxide laser light is easily absorbed by the metal. Due to the property of being hard to be absorbed, the temperature of the insulating coating coated on the conductor wire rises and is melted / vaporized, and only the required portion of the insulating coating can be removed very easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An insulating film removing apparatus for a conductor according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a structure of a conductor insulation film removing device according to the present invention, and FIG.

In FIGS. 1 and 2, 1 is a carbon dioxide gas laser oscillator, 2 is a power source and control device for the carbon dioxide gas laser oscillator 1, and 3 is a carbon dioxide gas laser oscillator for guiding and condensing the carbon dioxide laser light generated from the carbon dioxide laser oscillator 1. 1 is an optical system part, 4 is a condenser lens incorporated in the optical system part 3, 5 is a coil component using a conductor wire 6 coated with an insulating film, and 7 is a conductor wire 6 of this coil component 5 is soldered Terminals to be attached, 8 is a jig for fixing the coil component 5, 9 is a nozzle for blowing gas to a position where the carbon dioxide laser light is focused, 10 is a gas tank for supplying the gas, and 11 is the gas. A pipe for guiding 12 is a solenoid valve for controlling the flow of the gas.

In the above embodiment, the distance between the condenser lens 4 and the terminal 7 of the coil component 5 is set longer than the focal length,
The spherical aberration of the condenser lens 4 is utilized to make the energy distribution within the condensed spot diameter nearly uniform.

Further, in the present embodiment, nitrogen gas is used as an assist gas to supplement the removal of the insulating coating film on the conducting wire 6 by the carbon dioxide laser beam, but the assist gas is not limited to nitrogen gas. In addition, it is fully functional without the use of assist gas.

In the conductor insulating film removing apparatus of the present invention having the above-described structure, the optical system unit 3 first insulates the irradiation spot position where the carbon dioxide laser is focused while the oscillation of the carbon dioxide laser oscillator 1 is stopped. The coil component 5 is fixed by the jig 8 so that the conducting wire 6 whose coating is to be removed is positioned. In this state, the solenoid valve 12 is operated to start spraying the assist gas from the nozzle 9 onto the irradiation spot of the carbon dioxide gas laser, and a signal is sent to the power source of the carbon dioxide laser oscillator 1 and the control unit 2 to oscillate the carbon dioxide laser oscillator 1 for a certain period of time. Then, the insulating coating on the conducting wire 6 is removed, and after the irradiation of the carbon dioxide gas laser is completed, the blowing of the assist gas is stopped. If the coil component 5 for removing the insulating coating can be positioned continuously in a short time, the apparatus may be operated without blowing the assist gas.

Further, in the conductor insulating film removing apparatus according to the present embodiment, the temperature of the metal of the conductor wire 6 is increased by spraying the assist gas from the nozzle 9 simultaneously with the carbon dioxide laser light onto the position where the carbon dioxide laser light is focused. In addition, it is possible to suppress oxidation and to easily remove the melted and evaporated insulating coating from the portion of the terminal 7 to which the conductive wire 6 is soldered, and the effect of such assist gas spraying is shown in FIG. This will be explained with reference to b).

FIG. 3A is a sectional view of the conductor 6 and the terminal 7 when the assist gas is not sprayed, and FIG. 3B is a sectional view of the conductor 6 and the terminal 7 when the assist gas is sprayed. As shown in FIG. 3A, in the case of the insulating coating 13 made of polyurethane or the like, it may adhere to and remain as a thin film on the surface of the terminal 7 such as an electronic component without being evaporated after being melted by carbon dioxide laser irradiation. In this case, terminal 7
When the soldering of the conductor wire 6 is attempted, the insulating film 13 adhering to the surface of the terminal 7 repels the solder, so the wettability of the solder to the terminal 7 is poor, and the effect of removing the insulating film of the conductor wire 6 is I can't get it.

In order to avoid this, it is necessary to extend the laser irradiation time to evaporate the insulating coating 13 completely or to increase the output of carbonic acid laser light. In either case, the conductor 6 and the terminal 7 are heated. There are problems such as physical damage, deterioration of productivity, and enlargement of the carbon dioxide laser oscillator 1. In order to prevent this, an assist gas is blown from the nozzle 9 in the vicinity where the carbon dioxide laser light is focused so that the insulating coating 13 of the lead wire 6 is blown off from the terminal 7 as shown in FIG. Terminal 7
The temperature rise can be suppressed and oxidation can be prevented.

Further, in the insulating film removing device for a conductive wire according to the present embodiment, the effect is further enhanced if the energy distribution of the focused carbon dioxide gas laser light has a nearly uniform distribution within the focused spot. Yes, the effect of making the energy distribution uniform will be described with reference to FIGS. 4 (a) and 4 (b).
Also, description will be made with reference to FIGS. Figure 4
5A and 5B show the case where the energy distribution in the spot is not uniform, and FIGS. 5A and 5B show the case where the energy distribution in the spot is almost uniform. 4A and 4B, FIG. 4A is a cross-sectional view showing the relationship between the radius and energy distribution in the focused spot, and FIG.

Normally, the energy distribution of the focused carbon dioxide laser light has a shape close to a normal distribution in which the central portion of the focused spot is high as shown in FIG. 4 (a). However, the position of the conducting wire 6 for removing the insulating coating varies to some extent, and due to the product structure of the electronic component, the conducting wire 6 is always brought to the central portion where the energy distribution of the focused spot is high and the insulating coating is removed. It is not always possible. When the conductive wire 6 for removing the insulating film is not located in the central portion where the energy distribution is high, it is necessary to increase the energy of the entire spot in order to give the insulating film the energy required for removing the insulating film. At this time, the terminal 7 near the center of the focused spot
Further, as shown by 14 in FIG. 4B, higher energy is applied to the conductive wire 6 and the conductive wire 6 is easily melted and oxidized.

In order to prevent this phenomenon, the energy distribution in the focused spot of the carbon dioxide laser beam is made to be nearly uniform as shown in FIG. 5 (a), so that the insulating film 13 is formed as shown in FIG. 5 (b). Energy to be applied to portions other than the conductor wire 6 to be removed can be reduced, and the temperature of the terminal 7 of the electronic component and the conductor wire 6 can be prevented from rising and melting / oxidizing.

As a method of making the energy distribution within the spot diameter nearly uniform, a method of oscillating the carbon dioxide gas laser oscillator 1 in multimode, a method of using an SI type optical fiber for carbon dioxide laser, and a condenser lens 4 are used. Method of using spherical aberration, a slit for passing only the central portion inside the optical system portion 3 is cut, and a peripheral portion having a low energy distribution is cut, and a special filter having a low transmittance only in the central portion is provided in the optical system. There is a method of inserting the inside of the portion 3 to lower the output of the central portion.

In addition, in the insulating film removing apparatus for the conductor according to the present embodiment, while applying the energy required for removing the insulating film,
By continuously irradiating carbon dioxide laser light with a substantially constant output, it is possible to obtain a better effect. While applying the energy necessary for removing the insulating film,
The effect of continuously irradiating carbon dioxide laser light with a substantially constant output will be described with reference to FIGS. 6 (a) and 6 (b). Figure 6
(A) is a relationship between the time of carbon dioxide gas laser irradiation and the output of the carbon dioxide gas laser, and (b) is a cross-sectional view of the conductor 6 and the terminal 7 after the insulating film is removed.

As shown in FIG. 6 (a), while the energy necessary for removing the insulating film is applied, the carbon dioxide laser beam is continuously irradiated with a substantially constant output. It is possible to raise the temperatures of 6 and the terminal 7 and remove not only the carbon dioxide laser light irradiation surface but also the insulating coating 13 on the back side of the terminal 7 between the conductor 6 and the terminal 7 which are not directly irradiated with the carbon dioxide laser light. it can.

Further, in the conductor insulating film removing apparatus according to the present embodiment, the carbon dioxide laser oscillator 1 performs pulse oscillation with a high output peak value and a short oscillation time to remove the insulating film of the conductor 6. This can be performed by sublimation instead of the usual process of melting and evaporation, and the effect obtained when the carbon dioxide gas laser oscillator 1 performs pulse oscillation with a high output peak value and a short oscillation time is obtained. This will be described with reference to FIGS. 7 (a) and 7 (b). FIG. 7 (a) is a relationship between the time of carbon dioxide gas laser irradiation and the output of the carbon dioxide laser, and FIG. 7 (b) is a cross-sectional view of the lead wire 6 and the terminal 7 after the insulating film is removed.

A laser pulse is irradiated once or a large number of times by a laser oscillator 1 which performs pulse oscillation with a high output peak value and a short oscillation time as shown in FIG. 7A. As a result, the insulating coating 13 of the conducting wire 6 sublimes.
By removing the insulating coating 13 of the conductive wire 6 by sublimation, the temperature rise of the conductive wire 6 and the terminal 7 is suppressed, and the insulating coating 13 is removed.
The insulating coating 13 can be removed even if there is a resin or the like that is weak against high temperature in the vicinity of the removal.

However, as shown by 13 in FIG. 7 (b), this process can remove only the insulating coating 13 on the side of the conducting wire 6 which is irradiated with the carbon dioxide laser light.

[0025]

As described above, the apparatus for removing an insulating film from a conductor according to the present invention includes a carbon dioxide gas laser oscillator, an optical system portion for guiding and condensing the carbon dioxide gas laser light emitted by the carbon dioxide gas laser oscillator, and a carbon dioxide gas. A carbon dioxide laser beam is focused on a conducting wire for removing an insulating film, or an electronic component using the conducting wire, which is provided with a nozzle configured to blow gas to a position where the gas laser beam is focused. By locating it in a position, the temperature of the insulation coating coated on the conductor wire can be raised and melted to remove the insulation coating. It is possible to realize an insulating film removing device for a conductive wire which can cope with a high insulating film.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of a device for removing an insulating film from a conductor according to an embodiment of the present invention.

2 is a cross-sectional view of the main part of FIG.

FIG. 3 (a) is a cross-sectional view of the vicinity of a conductor portion when the assist gas is not sprayed, showing the effect of the embodiment with and without assist gas spraying. (B) A cross-sectional view of the vicinity of the conductor wire when the assist gas is sprayed.

FIG. 4 (a) is a distribution diagram showing the relationship between the radius and the energy distribution in the focused spot when the energy distribution in the focused spot of carbon dioxide laser light of the same embodiment is not uniform. Sectional view near the conductor

FIG. 5 (a) is a distribution diagram showing the relationship between the radius and energy distribution in the focused spot when the energy distribution in the focused laser spot of the embodiment is nearly uniform. (B) Conductor wire after removal of the insulating coating Sectional view near the section

FIG. 6 (a) is a characteristic diagram showing a relationship between laser irradiation time and output when carbon dioxide laser light is continuously irradiated with a substantially constant output while applying energy required for removing the insulating film. Cross-sectional view near the conductor after removing the insulating coating

FIG. 7 (a) is a characteristic diagram showing the relationship between laser irradiation time and output when the carbon dioxide laser light has a high output peak value and performs pulse oscillation with a short oscillation time. Cross-sectional view near the conductor after removing the coating

[Explanation of symbols]

 1 Carbon dioxide laser oscillator 2 Laser power supply and control unit 3 Optical system unit 4 Condenser lens 5 Coil component 6 Conductor wire 7 Terminal 8 Jig 9 Nozzle 10 Gas tank 11 Piping 12 Solenoid valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Taoka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Toshinori Kintaka, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A carbon dioxide gas laser oscillator connected to a power source and a control unit for controlling the power source, an optical system unit for condensing carbon dioxide gas laser light emitted from the carbon dioxide gas laser oscillator, and the optical system unit coupled to the optical system unit. It consists of a nozzle and a table part that positions and fixes a conductive wire with an insulating coating or an electronic component using the conductive wire under the nozzle. The insulating coating coated on the conductive wire is melted and removed by carbon dioxide laser light. Insulating film removing device for conducting wire. 2. A conductor wire insulating film removing apparatus according to claim 1, wherein the nozzle is provided with a gas inlet, and the gas is blown from the gas inlet to a position where the carbon dioxide laser light is condensed. 3. The insulating film removing device for a conductor according to claim 1, wherein the carbon dioxide laser oscillator has an energy distribution of the focused carbon dioxide laser light substantially uniform. 4. The insulating film removal of a conductor according to claim 1 or 2, wherein the carbon dioxide laser oscillator continuously emits carbon dioxide laser light with a substantially constant output while providing energy required for removing the insulating film. apparatus. 5. The apparatus for removing an insulating coating of a conductor according to claim 1 or 2, wherein the carbon dioxide gas laser oscillator performs pulse oscillation with a high output peak value and a short oscillation time.