JP3035087B2 - Drum core winding method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum core winding method and apparatus for winding a wire such as an insulated wire around a fine drum core such as ferrite.

[0002]

2. Description of the Related Art Conventionally, as a winding device of this kind, there is a device disclosed in Japanese Patent Publication No. 59-47767 proposed by the present applicant. This device has a mechanism for winding a wire around a drum core sandwiched by the winding chuck mechanism by rotating the winding chuck mechanism. Also, the cutting of the wire at the beginning and end of winding has been performed using the edge of the flange of the drum core.

[0003]

However, when the wire at the beginning and end of winding is cut using the edge of the flange of the drum core, there is a problem that a defect that the wire protrudes from the outer diameter of the flange of the drum core tends to occur. was there.

SUMMARY OF THE INVENTION In view of the above points, the present invention makes it possible to reliably cut the wire at the beginning and end of winding inside the outer diameter of the flange of the drum core, thereby causing a defect that the wire projects from the outer diameter of the drum core flange. It is an object of the present invention to provide a method and an apparatus for winding a drum core, which can prevent the occurrence of the problem and smoothly perform a winding operation on the drum core.

[0005]

In order to achieve the above object, a method of winding a drum core according to the present invention is a method of winding a wire around a drum core held by a rotatable winding chuck mechanism. After passing the wire through the split groove between the opening and closing claws of the chuck mechanism, the drum core is
While holding one flange, the first pressing pin in the winding chuck mechanism and the first sleeve around the pressing pin press the wire against one end face of the drum core, and the movable cutter member wherein said wire one
The wire is cut by the edge of the first sleeve located inside the outer diameter of the flange, and the wire is wound around the winding groove of the drum core by rotating the winding chuck mechanism thereafter.

[0006] Further, the drum core winding device of the present invention comprises:
Drum core with an even number of split grooves through which wires can pass
A holding member formed with an opening / closing claw for holding one of the flanges ; an opening / closing clamp member fitted to the outside of the opening / closing claw to open / close the opening / closing claw; and the drum core disposed at a central portion of the opening / closing claw. one of the first pressing pin that is biased in a direction to press the end face, located around the presser pins and said
Rotatably <br/> Bei give a winding chuck mechanism having a first wire cutting edge with sleeve diameter smaller than the one flange, the wire with the first wire cutting edge
Press down on one end face of the drum core with a sleeve
The first wire inside the outside diameter of the one flange
Specially designed for cutting with the edge of a sleeve with a cutting edge
It is a sign.

[0007]

According to the present invention, a sleeve with a first edge for cutting a wire is arranged around a first holding pin for holding the wire against the end face of the drum core, and the wire is moved by a movable cutter member. It can be cut with a wire cutting edge of a sleeve with a cutting edge.
Therefore, by setting the outer diameter of the sleeve smaller than the outer diameter of the flange of the drum core, the wire can be reliably cut inside the outer diameter of the flange of the drum core, and the occurrence of a defect that the wire protrudes beyond the outer diameter of the drum core can be prevented. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method and an apparatus for winding a drum core according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a winding chuck mechanism used in an embodiment of a method and an apparatus for winding a drum core according to the present invention, and FIG. 2 is a schematic perspective view of the entire configuration of the embodiment. The winding unit 10 in FIG. 2 has a plurality of winding chuck mechanisms 20 for holding a drum core on the front surface, and is movable back and forth as indicated by an arrow Y with respect to an apparatus base (not shown). .
The wire guide ring 12 and the wire chuck 13 of the wire guide bar 11 are provided above and below, respectively, corresponding to the respective winding chuck mechanisms 20. Each guide ring 12 is inserted with a wire 5 from a tension unit capable of feeding out the wire so that the wire is not loosened, and a wire end is held by a wire chuck 13. Normally, the guide ring 12 and the wire chuck 13 have a predetermined positional relationship with respect to the corresponding winding chuck mechanism 20. However, at the time of automatic wire replacement, the wire guide bar 11 and the wire chuck 13 are movable in the horizontal direction as shown by the arrow X in conjunction with the retracting of the winding unit 10. A binding bar 15 commonly used for each winding chuck mechanism 20 is fixed to an arm 14 swingably attached to a side surface of the winding unit 10. Further, a fixed traverse guide bar 16 is fixedly supported on the apparatus base side in common to each winding chuck 20 (however, the fixed guide bar 16 and the winding chuck mechanism 20 are moved when the winding unit 10 moves back and forth). Can be changed.)

[0010] As shown in FIG.
Is connected to the winding unit 10 via the bearing 21 and the mounting part 46.
Outer cylinder 23 rotatably supported by front frame 22
And a holding body 24 inserted in the inside thereof, and the holding body 24
A front-rear shaft 25 disposed inside the rear cylindrical portion, a sleeve 26 having a cutting edge fixed to the front-rear shaft 25, and attached to the front-rear shaft 25 through the inside of the sleeve 26, and a compression spring 27. And a holding pin 28 urged forward. Here, a timing pulley 35 for receiving a rotational driving force from the outside via a timing belt is fixed to the outer cylinder 23 with a nut 35A, and the holding body 24 is fixed to the outer cylinder 23 with a bolt 36. Are rotated integrally (however, the outer cylindrical body 23 and the holding body 24 do not move back and forth with respect to the bearing 21). A long slit groove 37 is formed in the rear cylindrical portion of the holding body 24 in the front-rear direction, and a pin 38 fixed to the front-rear shaft 25 is engaged with the slit groove 37. As a result, the front-rear shaft 25 can rotate integrally with the holding body 24 and can move back and forth by the length of the slit groove 37. The front part of the holding body 24 has four opening / closing claws 30 formed by four split grooves 29 which are orthogonal to each other, and the opening / closing claw 30 is always given an opening force by its own elasticity.
(However, if the split grooves 29 are arranged in a straight line so that the wire can pass in the direction crossing the front part of the holding body 24, the number of split grooves may be an even number.) A return compression spring 40 for urging the front-rear shaft 25 in the backward direction is provided at a rear portion of the front-rear shaft 25.
The sleeve 26 with the cutting edge is fixed to the front-rear shaft 25 by the screw component 41 and the pin 42. As a result, the front-rear shaft 25 and the sleeve 26 move integrally. The holding pin 28 is slidably fitted inside the sleeve 26, has a tip protruding from the sleeve 26, and can move back and forth with respect to the sleeve 26. Outer cylinder 23
An opening / closing clamp member 43 is slidably fitted back and forth at the front of the front part, and is urged forward by a compression spring 44.
It hits the slope of the opening / closing claw 30 and gives a force to close it.
A non-magnetic hard metal tip 45 is fixedly integrated with the drum core holding surface of the opening / closing claw 30.

As shown in FIGS. 3 and 4, the magnetic drum core 1 made of ferrite or the like has a winding groove 3 formed between flanges 2 at both ends. , Is performed by the supply chuck 50 grasped by a spring force. The supply chuck 50 has a pair of opening / closing levers 51 that sandwich the drum core 1 between the winding grooves 3, and a surface of the opening / closing lever 51 that is in contact with the inner surface of the flange is a flat surface 52. The supply operation of the drum core 1 is performed in a state in which the opening / closing claw 20 of the drum 20 is in contact with the distal end surface.

As shown in FIGS. 5, 6, 10 to 13, etc., a tying bar 15 and a tying guide 60 are provided for tying the wire 5 wound around the drum core 1. . 11 is fixed to the tip of an arm 61 pivotally supported by the front frame of the winding unit 10. The tangling guide 60 is a spring force at the time of tangling operation, and the outer peripheral surface of the flange of the drum core 1 is spring-loaded. To be pressed against.

As shown in FIGS. 6 and 7, a movable cutter member 62 is attached to the winding unit side for cutting the winding start portion of the wire 5. Movable cutter member 6
Reference numeral 2 denotes a shape that can move inside the split groove 29 of the holding body 24.
Similarly, as shown in FIGS. 13 and 14, the movable cutter member 62 is used for cutting the end portion of the wire 5.
(The cutter member 62 is movable to cut the winding start and end portions).

As shown in FIG. 9, a traverse fixing guide bar 16 is fixed and supported on the device base side for traversing the wire 5 when it is wound, and the winding unit 10 is moved back and forth with respect to the base. The movement causes the winding chuck mechanism 20 to move back and forth (in the axial direction of the drum core 1) so that the wire 5 is sequentially wound around the entire width of the winding groove 3 of the drum core 1. As described above, the traverse of the winding is performed by the drum core 1.
Supply, winding operation after winding operation, take-out of the drum core 1, wire replacement required for the wire replacement, and the like, so as to simplify the structure. .

As shown in FIGS. 17 to 20, a discharge suction nozzle 70 is used to discharge the wound drum core 1. The suction nozzle 70 has a V-groove 72 at the tip end surface, and the V-groove 72 has an air suction hole 7 connected to a negative pressure source.
1 is formed.

Next, the operation of the above embodiment will be described. First,
The drum core 1 is supplied to each winding chuck mechanism 20 included in the winding unit 10 as shown in FIG. That is, the supply groove 50 clamps the winding groove portion of the drum core 1 with a bubbling force, and in a state where the opening / closing claw 30 in FIG. 1 is opened (a state in which the opening / closing clamp member 43 in FIG. 1 is set to the retracted position). The flange 2 is inserted between the opening and closing claws (between the carbide metal chips). At this time, the flat surface 5 of the supply chuck 50
Numeral 2 is in contact with the tip surface (flat surface) of the opening / closing claw, that is, the tip surface of the holding body 24. Thereafter, the holding pin 28 in the retracted state moves forward as shown by the arrow P and pushes the end surface of the drum core 1 on the winding start side (due to the spring force of the compression spring 27 in FIG. 1). In this state, the open / close claws 30 of the holding body 24 are closed to hold the drum core 1. As a result, the drum core 1 is supplied to the winding chuck mechanism 20 on the basis of the inner surface of the flange 2, and the leading end surface of the holding body 24 is
Is flush with the inner surface.

Since the wire 5 pulled out from the tension unit prior to the supply of the drum core 1 is vertically passed through the split groove 29 between the opening and closing claws of the winding chuck mechanism 20 shown in FIG. 5, the sleeve 26
When the holding pin 28 advances, the wire 5 whose end is held by the wire chuck 13 is pressed against the end face of the drum core 1.

Next, as shown in FIGS. 6 and 7, the movable cutter member 62 moves in the direction of arrow Q, and cuts the wire 5 with the cutting edge E of the sleeve 26. Since the outer diameter of the sleeve 26 is set smaller than the outer diameter of the flange 2, the wire 5 is surely cut at the position inside the outer diameter of the flange. As shown in FIG. 7, a metal layer 4 for fixing the wire 5 by soldering is formed on both end surfaces of the drum core 1 in advance.

After cutting the wire at the winding start portion (see FIG. 6), the winding chuck mechanism 20 is driven to rotate, and the winding operation of the wire 5 around the winding groove 3 of the drum core 1 is started.
At this time, the tapered surface T of the holding body 24 on the winding chuck mechanism side guides the wire 5 to the winding groove 3. After the wire 5 is fitted into the winding groove 3, the winding operation of the wire 5 around the winding groove 3 is performed a plurality of times in the state shown in FIGS. Traverse of the winding is performed by gradually retracting the entire winding chuck mechanism 20 in the direction of arrow R with respect to the traverse fixed guide bar 16. Here, the drum core 1 is held by the winding chuck mechanism 20 so that the front end surface of the holding body 24 and the inner surface of the flange 2 are flush with each other, and the binding guide 60 in FIG. Since the wire 5 is positioned so as to be flush with the inner surface of the flange 2 on the other side, the wire 5 can be aligned and wound over the entire width of the winding groove 3.

After the winding of the wire 5 around the winding groove 3 is completed, as shown in FIG. 10, the binding bar 15 located above the winding chuck mechanism 20 rotates the arm 14 shown in FIG. As a result, the distal end of the binding guide 60 is pressed against the outer peripheral surface of the flange 2 of the drum core 1 as shown in FIG.
The wire 5 hooked on the outer peripheral surface of the flange 2 by being hooked on the flange 5 is guided by the entanglement guide 60, and is drawn downward across the flange 2 in the radial direction.

Next, as shown in FIG. 12, a sleeve 80 with a cutting edge provided outside the winding chuck mechanism 20 so as to face the winding chuck mechanism 20 and penetrates the inside thereof in a protruding direction. Pressed holding pin 81
Presses the wire 5 against the end face of the drum core 1 on the winding end side.

In the state shown in FIGS. 13 and 14, the movable cutter member 62 moves as shown by the arrow S, and cuts the wire 5 with the cutting edge E of the sleeve 80. Sleeve 8
Since the outer diameter of 0 is set smaller than the outer diameter of the flange 2, the winding end portion of the wire 5 is surely cut at the inner position of the outer diameter of the flange as shown in FIG.

In this embodiment, a cement wire previously coated with resin is used as the wire 5, and hot air is applied while the wound drum core 1 is continuously held by the winding chuck mechanism 20 as shown in FIG. Thereby, the winding in which the wire 5 is wound a predetermined number of times can be hardened.

After the winding hardening treatment (cement treatment), FIG.
As shown in FIGS. 17 and 18, the sleeve 80 and the pressing pin 81 are retracted, and instead, as shown in FIGS. 17 and 18, the discharge suction nozzle 70 is moved below the drum core 1 after the winding is hardened. 19 and 20 by releasing the holding of the drum core 1 by the
As described above, the wound drum core 1 is sent out onto the suction nozzle 70 for discharge, and the suction nozzle 70 receiving the drum core 1 holds the drum core 1 at a predetermined location (for example, the wound drum core) while sucking and holding the drum core 1 under negative pressure. 1 is placed on a lead frame.

After the end of the winding of the wire 5 is cut off as shown in FIG. 16, the wire chuck 13 holds the end of the wire with respect to the next drum core 1.

In the case of the above embodiment, the wire 5 is pressed against the end face of the drum core 1 by the holding pins 28 and 81 and the sleeves 26 and 80 around the holding pin, and the wire 5 is 26, 80, the wire 5 can be cut always inside the flange outer diameter by setting the outer diameter of the sleeve smaller than the outer diameter of the flange of the drum core 1. Failure to protrude outside the outer diameter can be prevented.

The wire 5 is inserted into the winding groove 3 of the drum core 1.
The traversing method for winding is performed by fixing the traverse fixed guide bar 16 and moving the winding unit 10, that is, the winding chuck mechanism 20 in the front-rear direction (the axial direction of the held drum core 1). However, by doing so, the following effects can be obtained.

That is, conventionally, the position of the wire drawn from the tension unit with respect to the drum core is changed by the traverse guide so that the wire is aligned and wound around the winding groove of the drum core. As the distance increases, it takes time to transmit the change due to the movement of the traverse guide to the drum core to be wound, and the movement of the traverse guide and the lateral movement of the wire fluctuate, and the wires are aligned and wound. It becomes difficult. On the other hand, in the traverse method of the present embodiment, the drum core 1 which is wound without causing the wire 5 to move in the lateral direction is moved in the axial direction thereof. The distance between the drum core 1 and the traverse is not delayed at all, and the alignment winding can be performed well. In the case of the conventional traverse, in order to solve the problem, the traverse guide is arranged and wound as close as possible to the wound one (that is, the distance d is minimized). As the wire diameter becomes thinner, it is necessary to further reduce the distance d by moving the traverse guide closer. However, there is a limit to downsizing of the chuck and guide, and in the case of a small drum core, it becomes difficult to align and wind. I was Specifically, in the case of a wire diameter of 25 μm, it was difficult to align and wind even when d = 3 mm in the conventional traverse method, but in the traverse method of this embodiment, it was possible to align and wind even when d = 20 mm. .

Now, as shown in FIG. 21, when the wire entanglement position U of the drum core 1 in which the wire 5 is wound around the winding groove 3 becomes lower, the wound drum core 1 as shown in FIG. In the case of mounting on the lead frame 90 and soldering, the lower portion of the wire entanglement position U may be broken at the time of soldering. 1 is performed. That is, as shown in FIG. 23, the angle correction step # 2 is executed after the wire cutting and winding hardening step # 1. In this angle correction step # 2, the winding chuck mechanism 20 is
When the drum core 1 is rotated within 60 degrees and the tangled position of the wire 5 in FIG. 24A is lower than, for example, the tangled position is turned sideways as shown in FIG. Then, the wound drum core removal process # 3 may be performed, and the lead frame mounting process # 4 may be performed.

When replacing the wire 5 to be supplied to each winding chuck mechanism 20 provided in the winding unit 10 of FIG. 2, the winding unit 10 is retracted and the wire guide bar 1 is moved.
The wire 5 can be quickly and automatically replaced by moving the wire chuck 1 and the wire chuck 13 in the lateral direction as indicated by the arrow X.

FIG. 25 shows a modification of the winding chuck mechanism in which the shapes of the sleeve with the cutting edge and the holding pin are changed. In this figure, the tip end surface of the cutting edge-equipped sleeve 26A is a tapered inclined surface except for the portion having the cutting edge E. The sleeve 26A is made up of the front and rear shaft 2 by the screw part 41 and the pin 42.
5 and the presser pin 28A is
6A is slidably penetrated, and is urged by a compression spring 27 so as to protrude forward, as in the case of FIG. 1 described above.

[0032]

As described above, according to the method and apparatus for winding a drum core according to the present invention, the wire at the beginning and end of winding can be cut reliably inside the outer diameter of the flange of the drum core. In this case, it is possible to prevent the wire from protruding from the outer diameter of the flange, and to perform the winding work on the drum core smoothly.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a winding chuck mechanism in a drum core winding method and apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the entire configuration of the embodiment.

FIG. 3 is a schematic side sectional view showing a step of supplying a drum core to a winding chuck mechanism.

FIG. 4 is a front view showing a supply chuck holding a drum core.

FIG. 5 is a schematic side sectional view showing a state where a winding chuck mechanism holds a drum core.

FIG. 6 is a schematic side sectional view illustrating a cutting step of a wire winding start portion.

FIG. 7 is an enlarged sectional view illustrating a cutting step of a wire winding start portion.

FIG. 8 is a schematic side sectional view illustrating a step of winding a wire around a winding groove of a drum core.

FIG. 9 is a schematic sectional side view illustrating a traverse method when a wire is wound around a winding groove of a drum core.

FIG. 10 is a schematic side cross-sectional view illustrating a step of tying a wire to a drum core.

FIG. 11 is a front view illustrating the operation of the binding guide.

FIG. 12 is a schematic side cross-sectional view illustrating a step of pressing a tangled portion of a wire with a holding pin.

FIG. 13 is a schematic side sectional view illustrating a cutting step of a wire winding end portion.

FIG. 14 is an enlarged cross-sectional view illustrating a cutting step of a wire winding end portion.

FIG. 15 is a front view showing a wire cutting portion at a winding end side end surface of the drum core.

FIG. 16 is a schematic cross-sectional side view showing a state of a winding chuck mechanism when a wound drum core is discharged.

FIG. 17 is a schematic sectional side view for explaining a stage before the drum core discharging step.

FIG. 18 is a front view illustrating a stage prior to a drum core discharging step.

FIG. 19 is a schematic side sectional view illustrating a drum core discharging step.

FIG. 20 is a front view illustrating a drum core discharging step.

FIG. 21 is a side sectional view of a wound drum core in which a wire entangled portion is lower.

FIG. 22 is a side cross-sectional view of the case where the wound drum core with the wire entangled portion lowered is mounted on a lead frame and fixed by soldering.

FIG. 23 is a process chart in the case of performing angle correction.

FIG. 24 is an explanatory diagram showing angle correction.

FIG. 25 is a partial sectional view showing a modified example of the winding chuck mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drum core 2 Flange 3 Winding groove 10 Winding unit 11 Wire guide bar 13 Wire chuck 15 Tying bar 16 Fixed guide bar for traverse 20 Winding chuck mechanism 24 Clamping body 26, 26A, 80 Sleeve with cutting edge 28, 28A , 81 Holding pin 29 Split groove 30 Opening / closing claw 50 Supply chuck 60 Tying guide 62 Movable cutter member 70 Discharge suction nozzle

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-55-124216 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 41/06

Claims (8)

(57) [Claims] 1. A method for winding a wire around a drum core held by a rotatable winding chuck mechanism, wherein the wire is passed through a split groove between opening and closing claws of the winding chuck mechanism, and then the wire is opened and closed. The claws hold one flange of the drum core, and the first holding pin in the winding chuck mechanism and the first sleeve around the holding pin attach the wire to one end face of the drum core. the hold-down, the one off the wire at the movable cutter member
Cutting the wire with the edge of the first sleeve positioned inside the outer diameter of the flange, and thereafter winding the wire around the winding groove of the drum core by rotating the winding chuck mechanism. Winding method. 2. After the wire is wound around the winding groove, a binding guide is pressed against the outer peripheral surface of the other flange of the drum core, and the binding wire guide is moved, whereby the wire is connected to the other flange. 2. The method according to claim 1, further comprising pulling out the other end surface of the drum core. 3. A wire traversing the other end face of the drum core by a second pressing pin outside the winding chuck mechanism and a second sleeve around the pressing pin, and the other end face of the drum core. And move the wire inside the outside diameter of the other flange with the movable cutter member.
3. The method according to claim 2, wherein the cutting is performed by an edge of the second sleeve placed . 4. The method according to claim 3, wherein after the wire is cut by an edge of the second sleeve, the winding chuck mechanism performs rotation for angle correction. 5. The drum core according to claim 1, wherein the drum core is sandwiched between the opening / closing claws such that the inner surface of the one flange of the drum core and the tip end surface of the opening / closing claw are located on the same plane. Winding method. 6. The wire traverse guide is fixedly arranged, and the winding chuck mechanism holding the drum core rotates while moving in the axial direction of the drum core to wind the wire around the winding groove. The method for winding a drum core according to claim 1, wherein: 7. A holding body having an opening / closing claw for holding one flange of a drum core with an even number of split grooves through which a wire can be passed, and a fitting member fitted outside the opening / closing claw to open / close the opening / closing claw. An opening / closing clamp member, a first pressing pin disposed at the center of the opening / closing claw, and urged in a direction of pressing against one end surface of the drum core, and a periphery of the pressing pin.
It enabled with rotatably example Bei winding chuck mechanism having a first wire cutting edge with sleeve diameter smaller than the one of the flanges, the first wire cutting the wire
A sleeve with an edge for one end of the drum core
Pressing and inside the outside diameter of the one flange
Cutting with the edge of the sleeve with the first wire cutting edge
A winding device for a drum core. 8. A wire chuck for holding the wire end , a binding wire guide movable from one side to the other side of the wire-wound chuck mechanism, and another part of the drum core.
A guide tying is biased in a direction that presses the flange outer peripheral surface of the square, and a second pressing pin is biased in a direction that presses the other end surface of the drum core, located on the periphery of the presser pins
And a second wire cutting edge with sleeve diameter than the other flange, the wire the first or second
Drum core with sleeve with edge for wire cutting 2
In a state where the wire is pressed against one or the other end surface, the wire is placed inside the one or other flange outer diameter.
Winding apparatus of the drum core according to claim 7, characterized in that it comprises a movable cutter member that cuts edge of the first or second wire cutting edge sleeves.