JP6547681B2 - Coil parts manufacturing method - Google Patents

Description

  The present invention relates to a coil component manufacturing method and a coil component manufacturing apparatus, and in particular, a coil component manufacturing method capable of preventing disconnection of a lead when peeling an insulation coating of a lead formed by covering a conductor such as a copper wire with an insulation coating. And a coil component manufacturing apparatus.

  Conventionally, as a method of winding the conducting wire of a coil component on a core, there is a method described in JP-A-2009-224599 (Patent Document 1). In this wire winding method, the insulating coating covering the conductor is peeled off while the conductive wire is wound around the core, and the conductor from which the insulating coating is peeled is joined to the electrode portion.

JP, 2009-224599, A

  By the way, when using the method of winding the conducting wire of the said conventional coil components around a core, it discovered that there existed a possibility that a conducting wire might break at the time of peeling an insulating film.

  Then, the subject of this invention is providing the coil components manufacturing method and coil components manufacturing apparatus which can prevent the disconnection of conducting wire, when peeling the insulation coating of conducting wire (wire).

In order to solve the above-mentioned subject, the coil parts manufacturing method of the present invention,
A core, a conducting wire wound around the core and having a conductor covered with an insulating film, a first electrode provided on the core and joined to a leading end of the conducting wire, and provided on the core and joined to a terminating end of the conducting wire A coil component manufacturing method for manufacturing a coil component having a second electrode, comprising:
Winding the wire around the core with the first tension being applied to the wire at least temporarily;
In a state where a second tension smaller than the first tension is applied to the lead, a peeling step of laser irradiation and peeling at least a part of the insulating coating of the lead, and bonding the starting end of the lead to the first electrode And bonding the end of the wire to the second electrode.

  Here, in the “at least temporarily in a state where the first tension is applied to the lead wire”, when the peeling step is performed after all the winding steps are completed, the first in all in the winding step is performed. Adding tension to the wire.

  According to the coil component manufacturing method of the present invention, at least a part of the insulating coating of the lead is laser-irradiated while applying a tension smaller than the tension applied to the lead when winding the lead around the core. Peel off.

  Therefore, when the laser irradiation is performed to peel off the insulating coating, the tension on the lead can be relaxed, so that even if at least a part of the insulating coating is peeled off and the breaking tension of the lead is reduced, breakage of the lead can be prevented. can do.

In one embodiment of the coil component manufacturing method,
In the peeling step,
Before the winding step, the start end peeling step of irradiating the start end of the lead wire bonded to the first electrode with a laser to peel off the insulating coating on the start end of the lead wire;
After the winding process and before the bonding process, the end of the lead wire bonded to the second electrode is irradiated with laser to peel off the insulating coating on the end of the lead wire.

  According to the embodiment, the leading end and the trailing end of the conducting wire are peeled off before the bonding step. Therefore, it is possible to simultaneously join the first electrode of the coil component and the beginning of the lead, and the second electrode of the coil component and the termination of the lead. Therefore, it is possible to further shorten the process operation time (tact time) required to join the lead wire and the electrode.

In one embodiment of the coil component manufacturing method,
The winding step includes completing the winding of the previous turn of the winding of the last turn of the wire to the core,
In the bonding step, after the final turn of the wire is wound on the core, the end of the wire is bonded to the second electrode.

  According to the embodiment, the winding operation is completed by the winding operation of the previous turn of the winding of the final turn of the winding operation to the core. Thereby, even if the wire diameter of the conducting wire is changed, there is room in the winding space. Therefore, even if the wire diameter of the wire is changed, when the wire is wound around the core, the insulating coatings of the wire will not be rubbed against each other and damaged.

  In one embodiment of the coil component manufacturing method, the insulating coating is peeled over the entire circumferential direction of the wire.

  According to the embodiment, since the insulating coating is peeled over the entire circumferential direction of the lead, no residue is generated by the insulating coating when the peeled lead and the electrode are joined. Therefore, it becomes possible to secure the connection reliability between the lead wire and the electrode.

  In one embodiment of the coil component manufacturing method, laser irradiation is performed on the conductive wire connected to each of the first and second electrodes, and after approximately half of the circumferential direction of the conductive wire is peeled, the side from which the insulating coating is peeled The laser irradiation is again performed toward the side on which the insulating coating remains, and the insulating coating is stripped over the entire circumferential direction of the wire by peeling off the remaining insulating coating.

  According to the embodiment, after the laser irradiation is performed toward a part of the lead connected to each of the first and second electrodes and the substantially half of the lead in the circumferential direction is peeled, the side from which the insulating coating is peeled is reversed. Then, the laser irradiation is performed again to the side where the insulating film remains, and the remaining insulating film is peeled off. As a result, since the tension is relaxed even when reversing the wire whose breaking resistance is reduced, disconnection of the wire due to the reversing operation can be prevented. Furthermore, since it is possible to peel all around using one laser irradiation unit, it is possible to further reduce the cost.

  In one embodiment of the coil component manufacturing method, laser irradiation is performed from two directions facing each other across the wire connected to each of the first and second electrodes so that the insulating coating is provided over the entire circumferential direction of the wire. Peel off. Here, the optical axes of the laser beams emitted from the two opposing directions may or may not be coaxial. The optical axes of the laser beams may be parallel and deviated by a predetermined distance. The optical axes of the laser beams may intersect at non-parallel angles (angles other than 180 ° such as 179 °).

  According to the embodiment, the insulating coating is peeled over the entire circumferential direction of the conducting wire by performing laser irradiation from two directions facing each other with a part of the conducting wire connected to each of the first and second electrodes. Therefore, since laser irradiation is performed simultaneously from two directions to peel all around, it is possible to further shorten the process time (tact time) required to peel off the insulating film.

The coil component manufacturing apparatus of the present invention is
A core, a conducting wire wound around the core and having a conductor covered with an insulating film, a first electrode provided on the core and joined to a leading end of the conducting wire, and provided on the core and joined to a terminating end of the conducting wire A coil component manufacturing apparatus for manufacturing a coil component having a second electrode, comprising:
A tensioning mechanism for applying a first tension and a second tension smaller than the first tension to the wire;
A nozzle drive for drawing the wire from the nozzle with the first tension applied to the wire at least temporarily;
And a laser irradiator configured to peel off at least a part of the insulating coating of the lead in a state where the second tension is applied to the lead.

  According to the coil component manufacturing apparatus of the present invention, the tension applying mechanism applies the first tension and the second tension smaller than the first tension to the wire. The nozzle drive draws the wire from the nozzle with the first tension applied to the wire. The laser irradiator laser-irradiates at least a part of the insulating coating of the lead in a state where the second tension is applied to the lead.

  Therefore, at least a part of the insulating coating of the lead is peeled off by laser irradiation with a tension applied to the lead smaller than the tension applied to the lead when the lead is wound around the core. As a result, when the laser irradiation is performed to peel off the insulating coating, the tension on the lead can be relaxed. Therefore, even if at least a part of the insulating coating is peeled off and the breaking tension of the lead is reduced, the lead is broken. It can be prevented.

  In one embodiment of the coil component manufacturing device, the laser irradiation unit peels the insulating coating over the entire circumferential direction of the conducting wire.

  According to the embodiment, since the insulating coating is peeled over the entire circumferential direction of the lead, no residue is generated by the insulating coating when the lead and the electrode from which the insulating coating is peeled are joined. Therefore, it becomes possible to secure the connection reliability between the lead wire and the electrode.

  In one embodiment of the coil component manufacturing apparatus, the laser irradiation unit includes a first laser irradiation unit and a second laser irradiation unit, and the first laser irradiation unit and the second laser irradiation unit are simultaneously a laser. The wires are opposed to each other across the wire so as to peel off the wire all the way around by irradiation. Here, the optical axes of the first laser irradiator and the second laser irradiator which are disposed opposite to each other may or may not be coaxial. The optical axes of the laser beams may be parallel and deviated by a predetermined distance. The optical axes of the laser beams may intersect at non-parallel angles (angles other than 180 ° such as 179 °).

  According to the embodiment, the insulating coating is peeled over the entire circumferential direction of the conducting wire by performing laser irradiation from two directions facing each other with a part of the conducting wire connected to each of the first and second electrodes. Therefore, since laser irradiation is performed simultaneously from two directions to peel all around, it is possible to further shorten the process time (tact time) required to peel off the insulating film.

  According to the coil component manufacturing method and coil component manufacturing apparatus of the present invention, since the tension on the lead can be relaxed when laser irradiation is performed to peel off the insulation coating, wire breakage is caused when the insulation coating is peeled off. It can prevent.

It is a schematic perspective view which shows the state which fixed the 1st, 2nd conducting wires 21 and 22 to clamp 65 of coil parts manufacturing device 1 concerning an embodiment of the present invention. It is a top view of the core 10 of FIG. 1A. It is a block diagram which shows the component of the coil components manufacturing apparatus 1 of FIG. 1A. It is the schematic which shows the structure of the tension provision mechanism 30 of FIG. It is a top view which shows the 1st process of the coil components manufacturing method by the coil components manufacturing apparatus 1 of FIG. 1A. It is a top view which shows the 2nd process of the coil components manufacturing method by the coil components manufacturing apparatus 1 of FIG. 1A. It is a graph explaining the tolerance of the conducting wire wound by the core of coil parts.

  Hereinafter, the present invention will be described in detail by the illustrated embodiments. It is noted that the inventors provide the attached drawings and the following description so that those skilled in the art can fully understand the present disclosure, and intend to limit the claimed subject matter by these. Absent.

(Specific issues found out by the inventors)
Conventionally, when manufacturing a coil component used for mobile products such as mobile phones, for example, when bonding a conductor to an electrode portion, a part of the entire circumference of the insulating coating is peeled off, and the peeled portion is an electrode The parts were joined by thermocompression bonding or laser welding. Here, the insulating coating of the portion not peeled off all around is vaporized by thermocompression bonding or laser welding and does not remain as a residue of the joint.

  In recent years, the need for coil components for vehicles has been increasing. When this coil component is manufactured, the heat-resistant insulating coating covering the conductor is used. Therefore, the insulating coating of the portion not peeled off all around is not vaporized by thermocompression bonding or laser welding and remains as a residue in the joint.

  In order to eliminate such a problem, when the conductor covering the insulating coating for heat resistance is joined to the electrode portion, the insulating coating is exfoliated (entire exfoliation) all around in advance, and the exfoliated portion A technique has been taken to bond the electrode to the electrode part.

  However, the present inventors have newly found that when peeling at least a part of the conducting wire, a new problem that the conducting wire tends to be broken occurs. In particular, when the wire is wound around the core, it is necessary to wind the wire with a certain degree of high tension applied to prevent loosening of the wire. If it is attempted to peel all around, for example, the possibility of breaking at the time of peeling becomes very high. The inventors newly found that in the case of peeling the entire circumference of the wire, the possibility of the wire breaking is increased.

  Furthermore, it can be expected that the above-mentioned problem will become more remarkable with the recent trend of thinning of the conducting wire.

  Focusing on the problems as described above, in the present embodiment, when winding the wire around the core, a strong first tension is applied to the wire to some extent, and when peeling at least a part of the insulating coating of the wire, the first tension is applied. A coil component manufacturing method and a coil component manufacturing apparatus capable of preventing disconnection of a lead by applying to the lead a second tension that is smaller and smaller than the breaking resistance tension of the separated lead (conductor). Hereinafter, a coil component manufacturing method and a coil component manufacturing apparatus according to the present embodiment will be described using FIGS. 1 to 5.

  FIG. 1A is a schematic perspective view showing a state in which first and second conducting wires 21 and 22 are fixed to clamps 65 of coil component manufacturing apparatus 1 according to an embodiment of the present invention, and FIG. 1B is a view of core 10 of FIG. It is a top view. As shown in FIGS. 1A and 1B, the coil component manufacturing apparatus 1 supplies a core support portion 64 for supporting the core 10 of the coil component, and the first and second conductive wires 21 and 22 to the core 10. And a nozzle 18 for winding the Further, two nozzles 18 are provided, and each nozzle 18 has first and second lead wire insertion holes 19 and 20, respectively. The first conducting wire 21 is passed through the first conducting wire insertion hole 19. The second conducting wire 22 is passed through the second conducting wire insertion hole 20.

  The coil component manufacturing apparatus 1 of FIG. 1A rotates the core 2 with the axis of the winding core portion 13 of the drum type core 10 as the rotation axis and turns the first and second conductors 21 and 22 into the winding core portion of the core 10 The coil component of the bifilar structure is manufactured by winding around substantially all of 13. This coil component is, for example, a common mode choke coil.

  The core 10 has a winding core 13, a first ridge 11 provided at one end of the winding core 13, and a second ridge 12 provided at the other end of the winding core 13. As a material of the core 10, for example, materials such as alumina (nonmagnetic material), Ni—Zn ferrite (magnetic material, insulator), resin and the like are used.

  The shape of the winding core 13 is, for example, a rectangular parallelepiped. The shape of the first collar portion 11 and the shape of the second collar portion 12 are, for example, rectangular flat plates. A first electrode 14 and a second electrode 15 are provided on the bottom surface of the first ridge portion 11 and the bottom surface of the second ridge portion 12, respectively. The material of the first and second electrodes 14 and 15 is, for example, Ag or the like. The starting end of the first conducting wire 21 is joined to the first electrode 14 of the first ridge portion 11 of the core 10. The starting end of the second conducting wire 22 is joined to the second electrode 15 of the first ridge portion 11 of the core 10. The end of the first conducting wire 21 is joined to the first electrode 14 of the second ridge 12 of the core 10. The end of the second conducting wire 22 is joined to the second electrode 15 of the second ridge 12 of the core 10. Then, tension is applied to the first and second conducting wires 21 and 22 by a tension applying mechanism 30 described later. The core 10 is installed on the XY plane such that the long axis L direction connecting the first ridge 11 and the second ridge 12 coincides with the Z direction. The first and second electrodes 14 and 15 are respectively joined to electrodes of a mounting substrate (not shown).

  The first and second conducting wires 21 and 22 are wound around the winding core portion 13 in a coil shape, and a copper wire insulated and coated is used. For example, the insulating coating is formed of polyamide imide (AIW), which is a heat resistant material. The first conducting wire 21 is wound around the core 10 to form a primary coil. The second conducting wire 22 is wound around the core 10 to form a secondary coil.

  The core support portion 64 is configured to be able to hold one of the first ridges 11 of the core 10. Further, the core support portion 64 is supported by a rotating device (not shown), and is configured to be rotated as an axis of rotation of the core 13 of the core 10 supported by the core support portion 64. When the first and second conducting wires 21 and 22 are wound around the winding core 13 of the core 10, the core 10 is also rotated in a state supported by the core support 64 and the shaft of the core 10 is also the shaft The core is rotated as a rotation axis, and the first and second conducting wires 21 and 22 respectively drawn out from the nozzle 18 are wound around the winding core portion 13.

  Further, a clamp 65 is provided in the core support portion 64, and the clamp 65 holds one end of the first and second conducting wires 21 and 22 respectively drawn out from the nozzle 18 and holds the one end in the clamp 65. One ends of the first and second conducting wires 21 and 22 are fixed to the core support portion 64. Therefore, when moving the nozzle 18 as described later, since one end of the first and second conducting wires 21 and 22 is fixed, the first and second conducting wires 21 and 22 move with the movement of the nozzle 18. It is drawn out from the nozzle 18 respectively.

  In addition, the coil component manufacturing apparatus 1 is provided with a cutter (not shown) for cutting the first and second conducting wires 21 and 22, and the cutter can move in any direction in three dimensions.

  FIG. 2 is a block diagram showing components of the coil component manufacturing apparatus 1 of FIG. 1A. The coil component manufacturing apparatus 1 of FIG. 1 includes a control unit 100, a tension applying mechanism 30, a core drive unit 70, a laser irradiation unit 80, and a nozzle drive unit 90. The control unit 100 controls the tension applying mechanism 30, the core driving unit 70, the laser irradiating unit 80, and the nozzle driving unit 90 to execute the following operations.

  The tension applying mechanism 30 of FIG. 2 applies a predetermined tension corresponding to each process of manufacturing the coil component to the conductive wire supplied to the core 10 of the coil component in accordance with the signal from the control unit 100. For example, the control unit 100 controls the tension applying mechanism 30 to apply a tension less than the breaking resistance of the conductor to the conductor supplied to the core 10 of the coil component in the step of peeling the insulating coating of the conductor all around. .

  The core drive unit 70 drives a rotation device (not shown) supporting the core support unit 64 according to a signal from the control unit 100 to rotate the core 10 supported by the core support unit 64.

  The laser irradiation unit 80 irradiates the laser to the first and second conducting wires 21 and 22 arranged in the vicinity of the core 10 according to the signal from the control unit 100, and the first and second conducting wires 21 and so on. In the 22 insulating films, the side surfaces joined to the electrodes are peeled all around. That is, the laser irradiation part 80 is a peeling means which irradiates a laser toward a conducting wire and peels an insulating film. Here, the laser irradiation unit 80 can irradiate a range of 300 mm square while scanning the laser, arranges the first and second conducting wires 21 and 22 in the 300 mm square laser irradiation range, and respectively irradiates the laser . In addition, one irradiation time is about several ms, and even if it irradiates several times continuously and performs several peeling, the time concerning the whole will be less than about 1 second. The laser irradiator includes, for example, a laser oscillator and an optical system for guiding the laser light to the irradiation position.

  The two laser irradiation units 80 may be disposed to face each other across the laser processing point, or the laser irradiation units 80 may be, for example, the lower side of the processing point (bottom side of the coil component manufacturing apparatus 1) It may be arranged at one place or the like.

  Here, in the case where the laser irradiation units 80 are arranged in two places across the processing point, each of the laser irradiation units 80 is directed to a part of the first and second conducting wires 21 and 22 arranged at the processing points. At the same time, they are irradiated at the same time to separate the entire circumference. As a result, laser irradiation is performed simultaneously from two directions to peel all around, so it is possible to further shorten the process time (tact time) required to peel off the insulating film.

  Moreover, when the laser irradiation part 80 is arrange | positioned at one place, the laser irradiation part 80 is laser-irradiated toward a part of 1st, 2nd conducting wires 21 and 22, and the 1st, 2nd conducting wires 21, 22 Approximately half in the circumferential direction is peeled off, then the side from which the insulating coating is peeled is reversed so that the side on which the insulating coating is left is opposed to the laser irradiation unit 80 and laser irradiation is performed again to peel off the remaining insulating coating. Peel all around. As a result, since the tension is relaxed even when reversing the wire whose breaking resistance is reduced, disconnection of the wire due to the reversing operation can be prevented. Furthermore, since it is possible to peel all around using one laser irradiation unit, it is possible to further reduce the cost.

  The laser to be irradiated is a second harmonic generation (SHG) laser, and the wavelength of this laser is about 532 nm. Therefore, the absorptivity is good with respect to the insulation film of each 1st, 2nd conducting wire 21 and 22 which consists of a polyamide imide which is a heat resistant material, and only an insulation film is aimed and heated, and an insulation film is removed efficiently. Is possible. It is possible to optimally remove the insulating coating at the interface between the first and second conducting wires 21 and 22.

  The nozzle 18 is supported by the nozzle drive unit 90, and the nozzle drive unit 90 pulls out the first and second conducting wires 21 and 22 from the nozzle 18 in response to a signal from the control unit 100. Further, the nozzle drive unit 90 moves the nozzle 18 in an arbitrary direction in the three-dimensional space according to a signal from the control unit 100.

  FIG. 3 is a schematic view showing the configuration of the tension applying mechanism 30 of FIG. The first and second conductive wires 21 and 22 are drawn out from the bobbin 71, guided to the nozzle 18 through the tension applying mechanism 30 described in detail below, and supplied from the nozzle 18 to the core 10 supported by the core support portion 64. Ru.

  The tension applying mechanism 30 of FIG. 3 includes, for example, a base plate 31, a main pulley 36 attached to a hysteresis brake 35, a tension arm 37 having a guide pulley 38, a potentiometer 40, a tension adjusting bolt 41, and a tension. A spring 45, a tension switching cylinder 51 provided with a movable piece 50, and a stopper 55 are provided. The first and second conducting wires 21 and 22 pulled out from the bobbin 71 are guided by the guide piece 61 and guided to the back side of the base plate 31 and are looped around the main pulley 36 through the guide pulleys 62 and 63 and further a tension arm It reaches the nozzle 18 through the guide pulley 38 provided at the tip of 37. The main pulley 36 is incorporated in the electromagnetic braking portion of the hysteresis brake 35.

  The tension arm 37 is rotatably provided on the base plate 31 with the support shaft 39 as a fulcrum, and a potentiometer 40 is installed on the support shaft 39. The potentiometer 40 detects the tension of the wire 5 based on the rotation angle of the tension arm 37, and controls the operation of the hysteresis brake 35 according to the detection result.

  The tension adjustment bolt 41 is rotatably mounted on the base plate 31 by the brackets 32 and 32 in parallel with the base plate 31. A knob 42 for manual rotation is attached to one end of the tension adjustment bolt 41. A tension switching air cylinder 51 is attached to a nut (not shown) screwed to the bolt 41 via a bracket (not shown), and is positioned directly above the bolt 41. The movable piece 50 is fixed to the end of the piston rod 52 of the air cylinder 51, and a coiled tension spring 45 is stretched between the movable piece 50 and the base end 37a of the tension arm 37. On the other hand, the stopper 55 is installed on the base plate 31 via the bracket 57 and is opposed to the movable piece 50.

  The movable piece 50 is set to the position A when the air cylinder 51 is not in operation. When the air cylinder 51 operates, the piston rod 52 advances to the position B, and the movable piece 50 is set to the position B. That is, the movable piece 50 is set to either of the positions A and B according to the set state of the operation or non-operation of the air cylinder 51, and when it is set to the position A, the tension spring 45 is strongly stretched. When set, the tension of the tension spring 45 is reduced, and the tension acting on the first and second conductors 21 and 22 through the tension arm 37 is changed accordingly. That is, the tension applying mechanism 30 can switch the tension of the first and second conducting wires 21 and 22 in two stages of large and small. For example, in the present embodiment, the tension when the movable piece 50 is set to the position B is 70% or less of the tension when the movable piece 50 is set to the position A and less than the breaking resistance of the conductor. Set to

  In the tension applying mechanism 30 configured as described above, the tension arm 37 is always applied with a turning force in the counterclockwise direction by the spring 45, and is balanced at the angle shown in FIG. When the tension of the first and second wires 21 and 22 increases during the winding operation, the tension arm 37 bends in the clockwise direction and rotates against the spring 45. A slight increase in tension is absorbed by this deflection and rotation. When a further tension acts on the first and second wires 21 and 22, the potentiometer 40 detects this, and the hysteresis brake 35 is activated according to the detection result to release or weaken the braking on the main pulley 36. As a result, the first and second conductors 21 and 22 are fed out, and the increase in tension on the first and second conductors 21 and 22 is eliminated.

  On the other hand, in the winding (winding) process of the core 10 to the winding core portion 13, the air cylinder 51 is controlled so as not to operate, the movable piece 50 is set at the position A, and the tension of the spring 45 is strongly tensioned. The tension acting on the first and second conductors 21 and 22 is increased. On the other hand, in the step of peeling the insulating coating of the first and second conducting wires 21 and 22 all around by laser irradiation, the air cylinder 51 is controlled to operate and the movable piece 50 is set at the position B. The tension acting on the first and second conductors 21 and 22 is reduced. Thus, the tension is automatically switched in accordance with the respective steps of the winding operation, thereby preventing the damage and the disconnection of the first and second conductors 21 and 22.

  In addition, when the first and second conducting wires 21 and 22 are newly set in the coil component manufacturing apparatus 1, the bolts 41 are rotated to change the initial position A of the movable piece 50, thereby the first and second conducting wires 21. , 22 can be adjusted in tension according to the material and wire diameter. Also, for example, in order to change the tension, a solenoid or another drive mechanism capable of switching the movable piece 50 to a plurality of positions can be used instead of the air cylinder 51. Also, the potentiometer 40 can be replaced with other sensors that detect the tension of the first and second conductors 21 and 22.

  Next, a method of manufacturing a coil component will be described. In the coil component manufacturing method, two first and second conducting wires 21 and 22 are simultaneously wound around the core 10 and joined to the first and second electrodes 14 and 15, respectively. This process is described in detail below.

  First, the movable piece 50 is set to the position A in the tension applying mechanism 30, and the first tension is applied to the first and second conducting wires 21 and 22.

  Next, as shown in FIG. 1A, one core portion 11 of the core 10 is gripped and fixed by the core support portion 64. Here, the core 10 can be rotated about the axis of the winding core portion 13 of the core 10 as a rotation axis.

  Next, as shown in FIG. 1A, the first and second conducting wires 21 and 22 are drawn out from the first and second conducting wire insertion holes 19 and 20 of the nozzle 18, and one end of each of the first and second conducting wires 21 and 22 is Are clamped by the clamp 65 and fixed to the core support portion 64.

  Next, the movable piece 50 is set to the position B in the tension applying mechanism 30, and the second tension (<first tension) is applied to the first and second conducting wires 21 and 22. Here, the tension applied to the first and second conductors 21 and 22 temporarily becomes loose. As described above, for example, the second tension is set to 70% or less of the first tension and less than the breaking resistance of the conductor (the same applies hereinafter).

  Next, as shown in FIG. 4, the first and second electrodes 14 and 15 of the first collar portion 11 are maintained while the tension applied to the first and second conducting wires 21 and 22 is kept relaxed. The whole of the insulating coating of the peeling portion 200 to be bonded to each other is peeled. In detail, the peeling part 200 which is a part of 1st, 2nd conducting wire 21 and 22 is moved to a laser irradiation range, laser irradiation is carried out, and the insulating film of the peeling part 200 is peeled in all the circumferences. As described later in detail, the exposed copper wire (conductor) is joined to the first and second electrodes 14 and 15 of the first flange portion 11, respectively.

  Next, the movable piece 50 is set to the position A in the tension applying mechanism 30, and a first tension is applied to the first and second conducting wires 21 and 22.

  Next, the peeling portions 200 of the first and second conducting wires 21 and 22 are disposed in the vicinity of the first and second electrodes 14 and 15 of the first collar portion 11, respectively.

  Next, the first and second conducting wires 21 and 22 are wound around the winding core portion 13 of the core 10 (winding step). Specifically, as shown in FIG. 5, the nozzle 18 is cored while rotating the core 10 and the core supporting portion 64 with the axis of the core 13 of the core 10 supported by the core supporting portion 64 as the rotation axis. The first and second conducting wires 21 and 22 are wound around the entire core 13 by moving the core 10 in the axial direction of the core 13. Then, when the winding operation of the one turn before the final winding operation is completed, the rotation operation by the core support portion 64 is ended, and the winding process is ended. Thereby, even if the wire diameter of the wire used for the 1st, 2nd conducting wires 21 and 22 is changed, there is room in winding space. Therefore, when the first and second conducting wires 21 and 22 are wound, the insulating coatings of the conducting wires are not damaged each other by rubbing.

  Next, the movable piece 50 is set to the position B in the tension applying mechanism 30, and the second tension (<first tension) is applied to the first and second conducting wires 21 and 22. Here, the tension applied to the first and second conductors 21 and 22 temporarily becomes loose.

  Next, as shown in FIG. 5, while maintaining the state in which the tension applied to the first and second conducting wires 21 and 22 is relaxed, each of the first and second electrodes 14 and 15 of the second flange 12 is maintained. The insulation coating of the peeling part 201 joined to each is peeled in all the circumference. Specifically, the peeling portion 201 is moved to a laser irradiation range, and laser irradiation is performed to peel the insulating coating of the peeling portion 201 all around. Therefore, when the laser irradiation is performed to peel off the insulating coating, the tension on the lead can be relaxed, so that even if at least a part of the insulating coating is peeled off and the breaking tension of the lead is reduced, breakage of the lead can be prevented. can do. In addition, since the insulating coating is peeled over the entire circumferential direction of the lead, no residue due to the insulating coating is produced when the peeled lead and the electrode are bonded. Therefore, it becomes possible to secure the connection reliability between the lead wire and the electrode.

  As described later in detail, the exposed copper wire (conductor) is joined to the first and second electrodes 14 and 15 of the second ridge 12 respectively.

  In addition, the laser irradiation is performed to the peeling portion 200 of the first and second conducting wires 21 and 22 used when manufacturing the next coil component continuously after the laser irradiation to the peeling portion 201 and the insulating coating is performed. It may be peeled off. Here, the peeling portion 200 is a region closer to the nozzle than the peeling portion 201 among the first and second conducting wires 21 and 22. This makes it possible to further reduce the process operation time (tact time) required for peeling.

  Next, the starting ends and the ends of the first conductive wires 21 and 22 are joined to the first and second electrodes 14 and 15 by thermocompression bonding or laser welding, respectively. Here, the movable piece 50 is set to the position A in the tension applying mechanism 30, and the first tension is applied to the first and second conducting wires 21 and 22.

  Next, the winding operation of the final turn is performed. That is, the first and second conducting wires 21 and 22 are wound around the winding core portion 13 of the core 10 by one turn.

  Next, the peeling portions 201 of the first and second conducting wires 21 and 22 are disposed in the vicinity of the first and second electrodes 14 and 15 of the second flange 12 respectively.

  Next, the peeling portions 200 and 201 of the first and second conducting wires 21 and 22 and the first and second electrodes 14 and 15 are joined by thermocompression bonding or laser welding, respectively. Here, these junctions may be performed simultaneously or sequentially. When bonding is performed simultaneously, it is possible to further reduce the process time (tact time) required to bond the conducting wire and the electrode.

  Finally, the cutter (not shown) is sequentially moved to the positions near the first and second ridges 11 and 12 of the core 10, and one end (start end) and the other end (end) of each of the first and second conducting wires 21 and 22 Cut each part. Thereby, a coil component is manufactured.

  In the present embodiment, the winding operation on the core in the winding step is performed in a state where a strong tension (first tension) is applied, but the present invention is not limited to this. For example, in winding of the first and second conducting wires 21 and 22 around the core 10, the control unit 100 controls the number of windings around the core 10 while maintaining weak tension (second tension) in the peeling step. It may be controlled to perform winding and then to apply and apply strong tension (first tension).

  In this way, when the first and second conducting wires 21 and 22 are wound around the core 10, it is possible to prevent a break in the peeling portion 200 from which the insulating coating is peeled. That is, as shown in FIG. 6, in the peeled portion 200 where the insulating coating is peeled, the breaking resistance tension is lowered as compared with the conducting wire whose entire circumference is covered with the insulating coating. However, after performing winding 1 to several times in a state in which the second tension is applied, winding of the first and second conductors 21 and 22 to the core 10 is performed in a state in which the first tension is applied. In this case, the first tension is not directly applied to the peeling portion 200 where the breaking resistance tension is reduced, and the breaking of the peeling portion 200 can be prevented.

  Here, FIG. 6 shows an example of the breaking resistance tension of a conducting wire in which an insulating film with a thickness of 0.005 mm is coated on a copper wire with a wire diameter of 0.05 mm, for example. As shown in this example, when the breaking resistance tension of the conducting wire coated with the insulating coating is 100, for example, the breaking resistance tension of the conductor (copper wire) from which the insulating coating is peeled is about It will be 50.

  In addition, although the insulating film of the peeling part 200 of the 1st, 2nd conducting wire 21 and 22 and the insulating film of the peeling part 201 of the 1st, 2nd conducting wire 21 and 22 were separated respectively in another process, the present invention Is not limited to this. For example, these peeling processes may be processed in one step. That is, laser irradiation is performed continuously in one process to separate the insulating coatings. As described above, since it is possible to continuously irradiate the laser in the same step and separate a part of the conducting wire, it is necessary to separate the insulating film in comparison with the separate steps. It is possible to further shorten the process operation time (tact time).

  In addition, the coil component manufacturing apparatus 1 has a configuration in which the first and second conductive wires 21 and 22 are wound around the core portion 13 by rotating the core 2 with the axis of the core portion 13 of the core 10 as the rotation axis. Although described, the present invention is not limited thereto. For example, instead of this configuration, the nozzle 18 may be revolved around the core 10 and the first and second conducting wires 21 and 22 may be wound around the core 13 of the core 10.

  In addition, this invention is not limited to the above-mentioned embodiment, A design change is possible in the range which does not deviate from the summary of this invention.

  In the above embodiment, two conductors are wound around the core, but one or more conductors may be wound around the core.

  In the above embodiment, the nozzle is moved along the longitudinal direction of the core, but the core may be moved relative to the nozzle along the longitudinal direction of the core.

DESCRIPTION OF SYMBOLS 1 Coil component manufacturing apparatus 10 Core 11 1st ridge 12 2nd ridge 13 Winding core 14 1st electrode 15 2nd electrode 18 nozzle 19 1st conductor penetration hole 20 2nd conductor penetration hole 21 1st conductor 22 2nd Lead wire 30 Tensioning mechanism 31 Base plate 32, 57 Bracket 35 Hysteresis brake 36 Main pulley 37 Tension arm 38 Guide pulley 39 Support shaft 40 Potentiometer 41 Tension adjustment bolt 42 Knob 45 Tension spring 50 Movable piece 51 Cylinder for tension switching 52 Piston rod 55 Stopper 61 Guide piece 62, 63 Guide pulley 64 Core support part 65 Clamp 70 Core drive part 80 Laser irradiation part 90 Nozzle drive part 100 Control part L long axis

Claims (4)

A core, a conducting wire wound around the core and having a conductor covered with an insulating film, a first electrode provided on the core and joined to a leading end of the conducting wire, and provided on the core and joined to a terminating end of the conducting wire A coil component manufacturing method for manufacturing a coil component having a second electrode, comprising:
Winding the wire around the core with the first tension being applied to the wire at least temporarily;
In a state where a second tension smaller than the first tension is applied to the lead, a peeling step of laser irradiation and peeling at least a part of the insulating coating of the lead, and bonding the starting end of the lead to the first electrode Bonding the end of the wire to the second electrode;
In the peeling step,
Before the winding step, the leading end peeling step of moving the leading end of the lead wire bonded to the first electrode to a laser irradiation range and irradiating the laser to peel off the insulating coating at the leading end of the lead wire;
After the winding step and before the joining step, the terminal peeling step of moving the terminal end of the lead to be bonded to the second electrode to a laser irradiation range and irradiating the laser to peel the insulating coating of the terminal of the lead viewing including the door,
The winding process is completed with a winding of the previous turn of the winding of the last turn of the wire to the core,
In the bonding step, after the peeling step is performed, a final turn is wound on the core of the conducting wire, and then the end of the conducting wire is joined to the second electrode . The coil component manufacturing method according to claim 1, wherein in the peeling step, the insulating coating is peeled over the entire circumference of the conducting wire in the circumferential direction. In the peeling step, laser irradiation is performed toward the lead wire joined to each of the first and second electrodes, and after approximately half of the circumferential direction of the lead wire is peeled, the side from which the insulation coating is peeled is reversed to form the insulation coating The coil component manufacturing method according to claim 2 , wherein the insulating coating is peeled over the entire circumferential direction of the wire by laser irradiation toward the remaining side of the wire and peeling the remaining insulating coating. In the peeling process, peeling the insulating coating over the entire circumference in the circumferential direction of the conductor by laser irradiation from said respective first, two opposite directions across the wire to be bonded to the second electrode, to claim 2 Coil component manufacturing method as described.

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