JPH11332050A - Method and device for treating lead terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively and efficiently eliminate an insulating coating from the entire surface of the core of a lead terminal part by melting and liberating the insulating coating of the lead terminal part through the heat generation of a conductive core due to induction heating, and by quickly cooling the insulating coating with a cooling agent for setting to a fragile state for brushing. SOLUTION: A lead terminal treating device is provided with a work set rest 4, where for example, a motor 2 that has a plurality of leads 3 in which the surface of a core 3a is covered with an insulating coating 3b is set, and a heating coil 5 is arranged near the work set rest 4. In such a treating device 1, the terminal part of the lead 3 is subjected to induction heating, an eddy current is induced in the core 3a, and an insulating coating 3b of the surface is subjected to liberation by melting, is quickly cooled by the jet of nitrogen gas, is hardened, set to a fragile state, and further brushed by rotary brushes 11 and 12 for breaking down and removing, thus simultaneously eliminating the insulating coating 3b at the terminal part of a plurality of leads 3 and hence improving the efficiency of removal work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a terminal of a lead made of a component such as a motor, various coils and a transformer, and a lead composed of electric wires.

[0002]

2. Description of the Related Art Conventionally, for example, in a motor such as a multi-pole stepping motor, a winding covered with a polyester insulating film (hereinafter simply referred to as an insulating film) is wound around a core.
This winding is drawn out to a predetermined length as a lead outside the motor case, and its terminal portion is used, for example, by being soldered to a terminal or the like.

Since the lead terminal is also covered with an insulating film, it is necessary to remove the insulating film when using (mounting) the motor. For example, a method of manually brushing the terminal unit using a metal brush,
Alternatively, a method is used in which the solder used is set at a high temperature and the insulating film is melted and removed by heat during soldering.

[0004]

However, in these treatment methods, the work efficiency of the work of removing the insulating film is inferior, and it is difficult to reliably remove the insulating film on the entire outer peripheral surface of the lead terminal portion. There was a problem that it is.

That is, the method of removing the insulating film by manual brushing is generally performed by pressing a thin lead end portion by hand and rubbing a metal brush from above onto the upper surface of the brush stand. However, in the case of a motor in which a large number of leads are pulled out, the brushing work is very troublesome and the work efficiency is inferior.In addition, the entire outer peripheral surface of each terminal portion of the large number of leads cannot be uniformly brushed, and the insulation is insulated. Reliable removal of the film becomes difficult.

In the method of removing the insulating film by heat at the time of soldering, a soldering iron is applied to each of the leads for a predetermined period of time (time during which the insulating film is melted). In addition, the work efficiency is inferior, and the insulation film may partially remain on the outer peripheral surface of the terminal part only by the heat of the solder, and the insulating film on the entire outer peripheral surface must be completely removed. Becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the work efficiency of an operation of removing an insulating film from a lead terminal portion and to improve the outer periphery of the terminal portion. An object of the present invention is to provide a lead terminal processing method capable of reliably removing an insulating film over the entire surface. Another object of the present invention is to provide a lead terminal processing apparatus capable of improving the work efficiency of the work of removing the insulating film of the lead terminal portion and reliably removing the insulating film on the entire outer peripheral surface of the terminal portion. To provide. It is another object of the present invention to provide a lead terminal processing apparatus capable of reliably supplying a coolant to a lead terminal unit, in addition to the object of the present invention.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a processing method for removing an insulating film at a lead terminal portion in which a surface of a core material is covered with an insulating film. The induction heating of the lead terminal portion over a predetermined length, the induction heating portion is cooled with a cooling medium to make it embrittled, and then the induction heating portion is brushed with a brush to insulate the lead terminal portion. It is characterized in that the film is removed.

[0009] With this configuration, the lead end portion whose surface is covered with the insulating film is heated by the induction heating, where an eddy current is induced in the conductive core material of the end portion and heat is generated. The insulating film on the surface is melted by heat generated from the inside of the material and is released (peeled) from the core material. The insulating film in the melted and released state is solidified by being rapidly cooled by a cooling medium and becomes embrittled, and the emulsified insulating film becomes a collapsed state by brushing with a brush from the outer peripheral surface of the core material. Removed reliably.

[0010] The invention according to claim 2 is a processing apparatus for removing an insulating film of a lead end portion in which a surface of a core material is covered with an insulating film, wherein a work setting means for fixing the lead; Induction heating means for supplying high-frequency current to a heating coil disposed around the lead terminal set on the work setting means for induction heating the terminal, and supplying coolant to the induction-heated lead terminal. And a cooling means for cooling the lead terminal with a brush, and a control means for controlling each of these means.

[0011] With this configuration, the core of the lead fixedly set in the work setting means is subjected to induction heating of the core material by the induction heating means via the heating coil.
The insulating film on the surface of the core material is melted and becomes free. Then, the insulating film in the loose state becomes a solidified and embrittled state by rapid cooling by the supply of the coolant from the cooling medium supply means, and the insulating film in the embrittled state is mechanically removed by brushing of the brushing means. . Then, by controlling these operations by the control means, the insulating film of the lead terminal portion is reliably and automatically removed.

Further, the invention according to claim 3 is characterized in that the coolant supply means has a shower nozzle which is provided integrally with a heating coil and injects coolant to an induction heating portion of the lead terminal portion. I do. With this configuration, the induction-heated lead terminal portion is cooled by the coolant injected from the shower nozzle provided integrally with the heating coil, so that the coolant is sprayed over the entire induction heating portion. And the melted insulating film can be surely brought into the embrittled state, and the removal of the insulating film becomes more reliable.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show one embodiment of a lead terminal processing apparatus according to the present invention, FIG. 1 is a schematic configuration diagram thereof, FIG. 2 is a schematic sectional view of a heating coil portion, and FIG.
Is a process diagram showing an example of the operation, and FIGS. 4 and 5 are explanatory diagrams of the operation.

In FIG. 1 and FIG. 2, a lead terminal processing device 1 (hereinafter simply referred to as a processing device 1) has a plurality of leads 3 in which the surface of a core material 3a is covered with an insulating film 3b. Is set, and a heating coil 5 is arranged near the work set table 4.

The heating coil 5 is formed, for example, by spirally winding a circular copper pipe 6 whose outer peripheral surface is covered with an insulating paint (not shown) as shown in FIG.
It is configured such that the outer peripheral surfaces of the plurality of leads 3 of the motor 2 can be surrounded by a predetermined gap. Further, a spirally formed shower nozzle 7 substantially in the same manner as the heating coil 5 is adhered and fixed to the inner surface side of the heating coil 5 by, for example, a metal such as stainless steel or a heat-resistant resin. Have been. A large number (eight in the figure) of injection holes 7a are formed in the shower nozzle 7 inward, and nitrogen gas, argon gas or liquid nitrogen Is injected.

Further, as shown in FIG. 1, the heating coil 5 is arranged so as to be movable by a coil moving device 8 as shown by an arrow B. The heating coil 5 is connected to a transistor inverter 9 to supply a high-frequency current of a predetermined frequency from the transistor inverter 9, and a cooling water supply device provided integrally (or separately) with the transistor inverter 9. (Not shown), cooling water is circulated and supplied into the copper pipe 6 of the heating coil 5.
The shower nozzle 7 integrated with the heating coil 5
Is connected to the coolant supply device 10.

In the vicinity of the heating coil 5, a pair of upper and lower rotating brushes 11 and 12 are provided. The rotary brushes 11 and 12 are provided with a large number of thin metal rods 11b and 12b protruding radially on the rotary shafts 11a and 12a, so that the outer shape is formed in a circular cross section. While rotating like arrow C of
It is configured so that it can move with respect to the lead 3 as indicated by an arrow d.

The work set table 4 holds, for example, four case holding members 1 for fixedly holding the case 2a of the motor 2.
4 and a clamp member 15 provided at an end on the side of the heating coil 5.
6 is connected. Then, when the clamp operating device 16 is operated, the clamp member 15 is closed to clamp the terminal 3A side of the lead 3.

An exhaust duct 18 connected to a fan device 17 is provided above the heating coil 5. The fan device 17, the coil moving device 8, the transistor inverter 9, and the coolant supply device are provided. 10, a brush operating device 13, a clamp operating device 16, etc.
It is connected to the. The control device 19 has, for example, a sequencer (not shown) and controls each device and the like as described later.

Next, an example of the operation of the processing apparatus 1 will be described with reference to the process diagram of FIG. 3 and the operation explanatory diagrams of FIG. 4 and FIG. Note that the respective steps shown in FIG.
The sequence is controlled by

First, the case 2a of the motor 2 (work) is set in the case holding member 14, and is set on the clamp member 15 in which the terminal 3A side of the lead 3 is open (S1).
01), the clamp operating device 16 is operated, the clamp member 15 is closed, and the terminal 3A side of the lead 3 is clamped (S102). At this time, the terminal portions 3A of the plurality of leads 3 are set in a substantially bundled state as shown in FIG.

When the lead 3 is clamped, the coil moving device 8 operates to move the heating coil 5 from the position shown in FIG.
And set to the position shown in FIG.
103). By setting the heating coil 5, the shower nozzle 7 integrated with the heating coil 5 is also set with a predetermined gap outside the terminal portion 3A of the lead 3.

Then, in the state shown in FIG. 4B, the transistor inverter 9 operates to supply a high-frequency current to the heating coil 5 (S104), and circulate cooling water in the copper pipe 6 of the heating coil 5. Supplied. By supplying the high-frequency current to the heating coil 5, an eddy current is induced in the conductive core material 3a (see FIG. 5) of the terminal portion 3A, and the core material 3a generates heat. By supplying the high-frequency current to the heating coil 5 for a predetermined time, the insulating film 3b coated on the surface of the core material 3a is melted and released by the heat generated by the core material 3a.

In this state, the coolant supply device 10 operates, and, for example, nitrogen gas is injected from the injection hole 7a of the shower nozzle 7 toward the terminal 3A of the lead 3 (S105). By this nitrogen gas injection, the terminal 3 of the lead 3
A is rapidly cooled, and the insulating coating 3b in the melted and released state is solidified to be in an embrittled state. Then, when the nitrogen gas is injected for a predetermined time, the coil moving device 8 is operated to move the heating coil 5 from the position shown in FIG. 4B and leave the terminal unit 3A (S106). Almost simultaneously with the movement of the heating coil 5, the brush actuating device 13 is operated to move the pair of rotary brushes 11, 12 from the position shown in FIG. , And at this position, the upper and lower rotating brushes 11 and 12 are rotated in directions indicated by arrows C (S107).

When the rotating brushes 11 and 12 rotate, the operation of the brush operating device 13 causes the rotating brushes 11 and 12 to rotate.
Is moved in the longitudinal direction of the terminal portion 3A, or is moved as needed in a direction in which the terminal portion comes into contact with or separates from the terminal portion 3A. Thereby, the thin rod 11 of the rotating brushes 11 and 12
As shown in FIG. 5 (b), the distal ends of the b and 12b enter between the terminal portions 3A of the lead 3 and the core material 3a of the terminal portion 3A.
The insulating film 3b which is in an embrittled state on the surface is removed.

When brushing is performed by the rotating brushes 11 and 12 for a predetermined time, the brush operating device 13 is operated to stop the rotation of the rotating brushes 11 and 12,
It is moved from the position in FIG. 4C to the original position (S108). Then, the clamp operating device 16 is operated to open the clamp member 15 as shown in FIG. 4D, and the motor 2 is brought into the unclamped state (S109).

In this state, the terminal 2 of the lead 3 is terminated by removing the case 2a of the motor 2 from the case holding member 14 as shown by an arrow E in FIG. 4D (S110). As shown, a terminal portion 3A made of the core material 3a from which the insulating film 3b has been removed is obtained. The fan device 17 of the exhaust duct 18 is constantly driven during the operation,
Gas and the like generated by the induction heating are discharged to the outside or into a predetermined processing apparatus (not shown) to prevent the working environment from deteriorating.

As described above, in the processing apparatus 1 of the above embodiment, the terminal portion 3A of the lead 3 is induction-heated, and the core member 3a is heated.
Eddy currents are induced to melt and release the insulating film 3b on the surface, which is rapidly cooled and solidified by injection of nitrogen gas to make it brittle, and this is further turned into a rotating brush 1
In order to brush and break away by 1, 12
The insulating film 3b of the terminal portion 3A of the plurality of leads 3 can be removed at the same time, and the work efficiency of the removing operation can be greatly improved.

Also, from inside the terminal 3A of the lead 3,
That is, since the core material 3a of the terminal portion 3A is heated by induction heating, the entire surface of the core material 3a is uniformly heated, and the insulating film 3b covering the entire surface can be melted and released. Insulating coating 3b
However, the insulating film 3b can be surely and efficiently removed because it is once embrittled by rapid cooling of the nitrogen gas and removed by brushing. As a result, for example, the soldering of the lead 3 to the terminal of the terminal portion 3A, a printed board (not shown), or the like is performed well, and a highly reliable connection state (soldering state) can be obtained. .

Further, since the rotating brushes 11 and 12 are provided so as to be movable with respect to the terminal portion 3A of the lead 3, the outer peripheral surface of the terminal portion 3A can be fixed regardless of the outer diameter of the terminal portion 3A. Brushing can be performed reliably, and the insulating film 3b
Can be more reliably removed. Furthermore, by appropriately setting the positions of the rotating brushes 11 and 12, the brushing force can be adjusted according to the outer diameter of the lead 3 and the like, and the lead 3 having various outer diameters can be easily handled. As a result, a highly versatile processing apparatus 1 can be obtained.

Further, the motor 2 is connected to the work set table 4
By simply setting the motor 2 in sequence, the control device 19 controls the sequence of each device, and induction heating, cooling and brushing are automatically performed. It is possible to greatly reduce the labor of the 3Aa processing operation.

Further, since the shower nozzle 7 is integrated with the heating coil 5, the shower nozzle 7 does not hinder the movement of the heating coil 5 and can easily follow and move so that the induction heating portion can be reliably formed. Can be cooled. In addition, safe nitrogen gas can be used as a coolant, and since the exhaust duct 18 is provided, it is possible to safely and cleanly remove the insulating film 3b without deteriorating the working environment. .

In the above embodiment, the shower nozzle 7 is integrally provided by directly fixing the inside of the spiral heating coil 5, but as shown in FIG. The shower nozzle 7 may be integrated at a predetermined interval by being connected to the inner surface of the copper pipe 6 via the connecting member 20. Also, the shower nozzle 7
And the number and position of the injection holes 7a can be appropriately changed and set in accordance with the number of leads 3 and the outer diameter.

In the above-described embodiment, a pair of upper and lower rotating brushes 11 and 12 are provided as brushing means. For example, upper and lower rotating brushes 11 and 12 and left and right rotating brushes (not shown) are provided. Brushing may be performed while appropriately controlling the left and right rotating brushes. With this configuration, the terminal 3 of the lead 3
A can be more reliably brushed over the entire outer peripheral surface of A, and the insulating film 3b can be more reliably removed. Further, the brushing means in the present invention is not limited to brushing with the rotating brushes 11 and 12, for example, a rod-shaped or plate-shaped brush may be used and moved in the longitudinal direction or the outer peripheral direction of the lead 3 for brushing. Is also good.

Further, in the above embodiment, the work set table 4 is fixedly disposed, and the heating coil 5 and the rotating brushes 11 and 12 are configured to be movable with respect to the terminal 3A of the lead 3. The rotating brushes 11 and 12 are fixedly arranged at predetermined positions, and the work set table 4 is configured to be moved with respect to the rotating brushes 11 and 12 or the heating coil 5 is fixedly arranged. The work set table 4 may be configured to move with respect to the heating coil 5.

Further, in the above embodiment, the lead 3 of the motor 2 is described as an example of the work, but the present invention is not limited to the lead 3 of the motor 2 but may be an inductor made of various coils, a transformer, or the like. The present invention can be applied to terminal treatment of any component having a winding (lead) or various electric wires having a lead. In the above embodiment, the number of terminals 3A of the leads 3, the form of the motor 2, the structure of the work set table 4, the driving method of the rotating brushes 11, 12, the positional relationship between the heating coil 5 and the rotating brushes 11, 12 and the like are as follows. This is merely an example, and it goes without saying that various changes can be made without departing from the spirit of each invention.

[0037]

As described above in detail, according to the first aspect of the present invention, the insulating film of the lead terminal portion is melted and released by the heat generation of the conductive core material by the induction heating, and this is changed to the coolant. As a result, the insulating film can be surely and efficiently removed from the entire surface of the core material of the lead terminal portion because of the rapid cooling and the brushing in an embrittled state.

According to the second aspect of the present invention, the insulating film of the lead terminal portion is caused to heat the conductive core material by induction heating by the induction heating means to be in a molten and released state, and this is supplied to the coolant supply means. Cooling is rapidly performed by the supply of coolant from the core to make it embrittled, and the insulating film in the embrittled state is brushed by brushing means, so that the insulating film can be reliably and efficiently removed from the entire surface of the core material of the lead terminal part. Can be removed.

According to the third aspect of the invention, in addition to the effect of the second aspect, the induction-heated lead terminal portion is cooled by a cooling nozzle jetted from a shower nozzle provided integrally with the heating coil. Because it is rapidly cooled by the agent, the coolant can be reliably injected over the entire induction heating part,
The melted insulating film can be reliably brought into an embrittled state, and the effect of removing the insulating film more reliably can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a lead terminal processing device according to the present invention.

FIG. 2 is a schematic sectional view of the heating coil portion.

FIG. 3 is a process chart showing an example of the operation.

FIG. 4 is an explanatory diagram of the operation thereof.

FIG. 5 is an explanatory diagram of the operation.

FIG. 6 is a schematic sectional view showing another embodiment of the heating coil portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead terminal processing apparatus 2 Motor (work) 3 Lead 3A Terminal part 3a Core material 3b Insulating film 4 Work set table 5 Heating coil 7 Shower nozzle 7a Injection hole 8 Coil moving device 9 Transistor inverter 10 Coolant supply device 11, 12 Rotation Brush 13 Brush actuator 16 Clamp actuator 19 Controller

Claims (3)

[Claims] 1. A method for removing an insulating film of a lead terminal part whose surface is covered with an insulating film, wherein said lead terminal part is induction-heated over a predetermined length, and said induction heating part is heated. A method of treating a lead terminal, comprising cooling the medium with a cooling medium to make the embrittled state, and then brushing the induction heating portion with a brush to remove an insulating film of the lead terminal portion. 2. A processing apparatus for removing an insulating film at a terminal portion of a lead in which a surface of a core material is covered with an insulating film, comprising: a work setting means for fixing the lead; and a lead set to the work setting means. Induction heating means for supplying a high-frequency current to a heating coil arranged around the terminal to induction-heat the terminal, and coolant supply means for supplying a coolant to the induction-heated lead terminal for cooling. A brushing means for brushing the cooled lead terminal with a brush, and control means for controlling each of these means. 3. The lead terminal according to claim 2, wherein said coolant supply means has a shower nozzle which is provided integrally with a heating coil and injects a coolant into an induction heating portion of said lead terminal portion. Processing equipment.