JP2006093245A - Method for connecting winding of drum core and winding connecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten an operation cycle time by cutting a wire to be wound around a drum core and thermally crimp it to an electrode on a drum core side only through one cycle. <P>SOLUTION: A wire 5 is primarily treated for connection to electrodes on the outer circumference surface of one flange of a drum core 1 held by a winding chuck mechanism 20, the winding core 3 of the drum core 1 is wound by the wire 5, and the wire 5 is secondarily treated for connection to electrodes on the outer circumference surface of the other flange. In this case, an edge as a cutter blade is formed at the end position of the thermal crimping surface 44 of a thermal crimping head 40, and both cutting operation of the wire by the edge and fixation operation of the wire 5 onto the electrodes of the outer circumference surface on thee thermal crimping surface 44 are completed by one cycle operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a winding connection method and apparatus for a drum core used for inductor products in electronic components (coil products in which a conducting wire is wound around a core), and in particular, insulation coated conductors and the like for drum cores such as ferrite. In a winding machine for winding a wire, a winding connection of a drum core capable of performing a cutting operation of a winding wire wound around the drum core and a thermocompression bonding operation to the electrode on the outer peripheral surface of the drum core in one cycle. The present invention relates to a wire method and a winding connection device.

  Conventionally, at the time of this type of winding connection, as in Patent Document 1 below, the winding wire is brought into contact with the end face of the chucked drum core with a pusher, and the end of the pusher shaft is cut by the cutter blade on the outer periphery side of the drum core. And cut along the axial center direction. In Patent Document 1, there is no specific description about the welding and fixing of the winding wire to the drum core end face.

JP-A-6-132152

  By the way, when fixing the winding wire to both end surfaces of the drum core, it is necessary to fix the winding wire to one end surface, and then to the other end surface at another station, so the pusher for one end surface and the pusher for the other end surface (one end surface) When the wire cutting operation and thermocompression bonding operation are performed in one cycle using the pusher itself as a heater, two heaters are necessary and the number of parts increases. was there.

  The first object of the present invention is to wind a drum core that can perform the cutting operation of the wire wound around the drum core and the thermocompression bonding operation to the drum core side electrode in one cycle, and can shorten the operation cycle time. An object of the present invention is to provide a wire connection method and a winding connection device.

  The second object of the present invention is to perform the wire connecting process to the outer peripheral surface of the drum core flange at one end and the outer peripheral surface of the drum core flange at the other end at the same station using the same thermocompression bonding head. It is an object of the present invention to provide a winding connection method and a winding connection device for a drum core that can reduce the size and cost of the device.

  Other objects and novel features of the present invention will be clarified in embodiments described later.

  In order to achieve the above-described object, the winding connection method of the drum core of the present invention performs the primary connection processing of the wire on the electrode on the outer peripheral surface of one flange portion of the drum core held by the winding chuck mechanism, When a wire is wound around the core part of the drum core and the wire is subjected to secondary connection processing to the electrode on the other outer peripheral surface of the drum core, an edge as a cutter blade is provided at the end position of the crimping surface of the thermocompression bonding head. The wire cutting operation by the edge and the operation of fixing the wire to the electrode on the outer peripheral surface of the flange portion by thermocompression bonding are performed in one operation.

  In the winding connection method, edges as cutter blades are formed at both ends of the crimping surface of the thermocompression bonding head, and the thermocompression bonding head is moved to move the primary connection processing and the secondary. The connecting process may be performed at the same station using the same thermocompression bonding head.

  The winding connecting device used in the winding connecting method includes a winding chuck mechanism for holding a drum core provided with electrodes on both outer peripheral surfaces of the flanges, and an edge as a cutter blade at the end position of the crimping surface. The wire is cut by an edge of the thermocompression bonding head, and the wire is fixed to the electrode on the outer peripheral surface of the flange by thermocompression bonding.

  In the winding connecting device, edges as cutter blades are formed at both end positions of the crimping surface of the thermocompression bonding head, and the thermocompression bonding head has a wire 1 with respect to an electrode on one outer peripheral surface of the flange. It is good also as a structure provided so that the movement means can move freely from the position which performs a next connection process to the position which performs the secondary connection process of a wire with respect to the electrode of the other collar outer peripheral surface.

  In the winding connection device, the thermocompression bonding head may be constituted by a ceramic heater.

  According to the winding connection method and the winding connection device according to the present invention, since the edge as the cutter blade is formed at the end position of the crimping surface of the thermocompression bonding head, the cutting operation of the wire wound around the drum core In addition, the thermocompression bonding operation to the drum core side electrode can be performed in one cycle, and the operation cycle time can be shortened.

  Further, if edges as cutter blades are formed at both end positions of the crimping surface of the thermocompression bonding head, the wire is primary-joined to the electrode on one outer peripheral surface of the collar by moving the thermocompression bonding head; It is possible to perform the secondary connection process of the wire to the electrode on the outer peripheral surface of the other flange at the same station using the same thermocompression bonding head, and the apparatus can be reduced in size and cost can be reduced.

  BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a winding connection method and a winding connection device for a drum core will be described below with reference to the drawings as the best mode for carrying out the present invention.

  FIG. 6 is a schematic perspective view of the overall configuration of the winding connecting device used in the embodiment. The winding unit 10 of FIG. 6 has a plurality of winding chuck mechanisms 20 that hold 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 respectively provided up and down corresponding to each winding chuck mechanism 20. Each guide ring 12 is inserted with a winding wire (insulating conductive wire or the like) 5 from a tension unit that can draw out the winding wire so as not to loosen, and the end of the wire is clamped by a wire chuck 13. It is like that. The guide ring 12 and the wire chuck 13 are normally in a predetermined positional relationship with respect to the corresponding winding chuck mechanism 20. However, at the time of automatic wire exchange, the wire guide bar 11 and the wire chuck 13 are movable in the horizontal direction as indicated by an 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 that is swingably attached to a side surface of the winding unit 10. Further, the traverse fixed guide bar 16 is fixedly supported on the apparatus base side in common with each winding chuck 20 (however, when the winding unit 10 moves back and forth, between the fixed guide bar 16 and the winding chuck mechanism 20). The relative positional relationship of can be changed.)

  As shown in FIGS. 1, 2, 7, and 8, the winding chuck mechanism 20 includes a pair of open / close claws 30 and a pusher 6 that can be moved up and down and that can be positioned between the front-facing surfaces of the open / close claws 30. For example, it can be rotated in a horizontal plane.

  As shown in FIG. 7, the magnetic drum core 1 such as ferrite has a core portion 3 formed between flanges (flanges) 2 at both ends, and the supply of the drum core 1 to the winding chuck mechanism 20 is a spring force. This is performed by the supply chuck 50 grasped by the above. The supply chuck 50 has a pair of opening / closing levers 51 for sandwiching the drum core 1 between the cores 3, and the surface of the opening / closing lever 51 that contacts the inner surface of the flange is a flat surface 52, and the flat surface 52 is a winding chuck. The supply operation of the drum core 1 is executed in a state where the tip end surface of the opening / closing claw 30 of the mechanism 20 is in contact. Note that the end surface of the drum core 1 is positioned in contact with the front surface 6a of the pusher 6 located between the pair of opening and closing claws 30.

  As shown in FIG. 8, the traverse fixing guide bar 16 is fixed and supported on the apparatus base side for traversing when the wire 5 is wound, and the winding unit 10 moves back and forth with respect to the base. The winding chuck mechanism 20 is moved 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 core portion 3 of the drum core 1. Thus, the traversing of the winding is performed by using the moving function of the winding unit 10 necessary for supplying the drum core 1, connecting processing before and after the winding operation, taking out the drum core 1, replacing the wire, and the like. The configuration is intended to simplify the configuration.

  FIG. 1 is a schematic enlarged view of the chuck mechanism 20 during the primary connecting process of the wire 5 to the electrode 2a on the outer peripheral surface of one flange portion of the drum core 1. FIG. The chuck mechanism 20 has a pair of opening / closing claws 30 and a pusher 6 that can be positioned between the opposing surfaces of both opening / closing claws 30, and a fixing pin 31 is provided on the upper surface of the opening / closing claw 30 on one side. . This fixing pin 31 is used to bind the winding start side end of the wire 5.

  The pusher 6 between the opposed surfaces of the pair of opening / closing claws 30 is movable up and down. The wire 5 is sandwiched between the pusher 6 and a thermocompression bonding head 40 described later with reference to FIGS. Blade) 44a. As shown in FIG. 1A, end electrodes 2a and 2b for fixing the wire 5 by thermocompression bonding are formed in advance on the outer peripheral surface of the flange portion of the drum core 1. When the wire material of the wire 5 is Cu wire, the end electrode is a metal film of Cu, Ni or the like by vapor deposition, plating, or the like. The end electrodes 2a and 2b are provided on at least one of the outer peripheral surfaces of the collar portion (may be provided over the entire outer peripheral surface).

  FIG. 2 is a schematic enlarged view of the chuck mechanism 20 during the secondary connecting process of the wire 5 to the electrode 2b on the outer peripheral surface of the other flange portion of the drum core 1. FIG. A support member 7 that can be raised and lowered supports the lower surface of the flange portion of the drum core 1 (the one that is not held by the opening / closing claw 30), and the wire 5 is sandwiched between the pusher 8 that can be raised and lowered and the thermocompression bonding head 40. Cutting is performed with an edge (cutter blade) 44b.

  3 and 4 are schematic views of the thermocompression bonding head moving mechanism. This thermocompression bonding head moving mechanism is arranged on the upper part of the winding unit 10 in FIG. 6 (the thermocompression bonding head moving mechanism is not shown in FIG. 6). One end of the drive motor 45 and the feed screw 46 are connected via a joint 47, and the other end of the feed screw 46 is rotatably supported by a bearing 48. The feed screw 46 is parallel to the rotation center axis of the chuck mechanism 20, and if the rotation center axis of the chuck mechanism 20 is horizontal, the feed screw 46 is also supported horizontally. The slider 42 can be moved in the horizontal direction by rotating the drive motor 45. A vertical drive actuator 43 is fixed to the lower end of the slider 42. A thermocompression bonding head 40 is attached to the movable end of the vertical drive actuator 43. The thermocompression bonding head 40 can be moved up and down by driving the vertical drive actuator 43. The thermocompression bonding head 40 is a ceramic heater, and the exterior member of the ceramic heater is made of a ceramic material having good thermal conductivity such as silicon nitride. Further, sharp edges 44a and 44b as cutter blades are formed at both ends of the crimping surface 44 made of the ceramic material of the thermocompression bonding head 40, respectively.

  In the primary connection processing of the wire 5 to the electrode 2 a on the outer peripheral surface of one flange portion of the drum core 1 shown in FIG. 3, the pressure bonding surface 44 and the pusher of the thermocompression bonding head 40 lowered to the upper surface of the flange portion of the drum core 1. 6, the wire 5 is sandwiched by the pusher 6 along the end surface of the drum core 1 and cut by the sharp edge 44a. At the same time, the wire 5 is heated and pressurized by the pressure-bonding surface 44 (pulsed at 600 to 700 ° C.). A terminal of the wire 5 on the winding start side is thermocompression bonded to the electrode 2a. At this time, even if the wire 5 is an insulation coated conductor, the insulation coating is scattered at a high temperature, and the Cu core wire is welded and joined to the electrode 2a.

  In the secondary connection process of the wire 5 to the electrode 2b on the outer peripheral surface of the other flange portion of the drum core 1 shown in FIG. 4, the lower surface of the flange portion of the drum core 1 (held by the opening / closing claw 30) is supported by the liftable support member 7. The wire 5 is sandwiched between the crimping surface 44 and the pusher 8 of the thermocompression bonding head 40 lowered to the upper surface of the flange portion of the drum core 1, and a sharp edge (cutter blade) 44 b is moved by the raising operation of the pusher 8. At the same time, the wire 5 is heated and pressurized by the pressure-bonding surface 44, and is thermocompression-bonded to the electrode 2b.

  Next, the overall operation of the above embodiment will be described. First, the drum core 1 is supplied to each winding chuck mechanism 20 provided in the winding unit 10 as shown in FIG. That is, the portion of the core portion 3 of the drum core 1 is held by the supply chuck 50 with a squeezing force, and one flange portion 2 of the drum core 1 is inserted between the opening and closing claws 30 in a state where the pair of opening and closing claws 30 in FIG. To do. At that time, the flat surface 52 of the supply chuck 50 is brought into contact with the distal end surface (flat surface) of the opening / closing claw. Thereafter, the pair of opening / closing claws 30 are closed to sandwich the drum core 1. As a result, the drum core 1 is supplied to the winding chuck mechanism 20 with reference to the inner surface of the flange 2.

  Next, after the supply chuck 50 returns to the ascending position, the primary connection processing of the wire 5 is performed on the electrode 2a on the outer peripheral surface of one flange portion of the drum core 1 (connection processing on the right side of the drum core in FIG. 5). That is, when the winding chuck mechanism 20 is stopped as shown in FIG. 1A, the fixing pin 31 is entangled with the winding start side of the wire 5, and the wire 5 is placed on the outer peripheral surface of the collar as shown in FIG. It is set so that it can be drawn into the core part 3 along. Then, as shown in FIGS. 1B and 1C, the thermocompression bonding head 40 descends in the direction of arrow j to press the wire 5 against the upper surface of the buttock and the pusher 6 rises in the direction of arrow i. The wire 5 is cut by a sharp edge 44a as a cutter blade formed at the end position of the crimping surface 44 of the thermocompression bonding head 40. Along with the cutting operation, the wire 5 is thermocompression bonded (welded and fixed) to the end electrode 2a. The downward movement of the thermocompression bonding head 40 in the direction of arrow j is performed by driving the vertical drive actuator 43 shown in FIG.

  After cutting the wire at the winding start portion, the thermocompression bonding head 40 returns to the raised position, and the winding chuck mechanism 20 is driven to rotate to wind the wire 5 around the core portion 3 of the drum core 1. The traverse method when winding the wire 5 around the core portion 3 of the drum core 1 is such that the traverse fixing guide bar 16 is fixed as shown in FIG. 8, and the winding unit 10, that is, the winding chuck mechanism 20, is moved back and forth. This is done by moving in the direction (axial direction of the held drum core 1).

  After the winding of the wire 5 around the winding core portion 3 is finished, the wire is secondarily connected to the electrode 2b on the outer peripheral surface of the other flange portion of the drum core 1 (the connecting processing on the left side of the drum core in FIG. 5). That is, as shown in FIG. 2A, one flange portion 2 of the drum core 1 is sandwiched between a pair of opening and closing claws 30, and the support member 7 is lifted when the winding chuck mechanism 20 is stopped, and the drum core 1. The lower surface of the other collar portion is supported. Further, the thermocompression bonding head 40 is moved in the horizontal direction from the position of FIG. 3 where the primary connection processing is performed to the position of FIG. 4 where the secondary connection processing is performed. This horizontal movement is performed by moving the slider 42 in the horizontal direction by rotating the drive motor 45 shown in FIGS. Further, as shown in FIG. 2B, the winding end side of the wire 5 is drawn out in a substantially horizontal direction along the outer peripheral surface of the flange portion.

  After that, as shown in FIGS. 2B and 2C, the thermocompression bonding head 40 descends in the direction of arrow j to press the wire 5 against the upper surface of the buttock, and the pusher 8 rises in the direction of arrow k. Is cut by a sharp edge 44b as a cutter blade formed at the end position of the pressure bonding surface 44 of the thermocompression bonding head 40. Along with this cutting operation, the wire 5 is thermocompression bonded (welded and fixed) to the end electrode 2b. That is, as shown in FIG. 5, it is thermocompression bonded to the same surface as the surface on which the primary connection process has been performed.

  After the completion of the secondary connection process, an inductance element in which the winding wire 5 is wound around the drum core 1 as shown in FIG. 5 is completed.

  According to this embodiment, the following effects can be obtained.

(1) Since sharp edges 44a and 44b as cutter blades are formed at both end positions of the crimping surface 44 of the thermocompression bonding head 40, the cutting operation of the wire 5 wound around the drum core 1 and the drum core side electrodes 2a and 2b. The thermocompression bonding operation can be performed in one cycle, and the operation cycle time can be shortened.

(2) Further, the drive motor 45 is rotated and the slider 42 is moved in the horizontal direction, whereby the thermocompression bonding head 40 is subjected to the primary wire connecting process to the electrode 2a on the outer peripheral surface of one of the drum cores 1. Can be moved in a horizontal direction to a position where the wire is secondarily connected to the electrode 2b on the outer peripheral surface of the other flange portion of the drum core 1, the primary connection processing and the secondary connection processing are the same. It can be performed at the same station using a thermocompression bonding head, and the apparatus can be reduced in size and cost.

(3) The thermocompression bonding head 40 is a ceramic heater, and since the crimping surface 44 of the thermocompression bonding head 40 and the sharp edges 44a and 44b as the cutter blades at both ends thereof are made of a ceramic material, the quality is stable and the life is long. .

  In the above embodiment, the winding chuck mechanism 20 rotates to wind the wire 5 around the drum core 1, but the winding chuck mechanism does not rotate but winds the wire around the drum core. However, the present invention is applicable.

  Although the embodiments of the present invention have been described above, it will be obvious to those skilled in the art that the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS It is embodiment of the winding connection method and winding connection apparatus of a drum core which concern on this invention, Comprising: (A) is a principal part top view at the time of a primary connection, (B) is the principal part side surface before a cutting | disconnection. FIG. 4C is a side view of the main part at the time of cutting and thermocompression bonding. BRIEF DESCRIPTION OF THE DRAWINGS It is embodiment, (A) is a principal part top view at the time of a secondary connection, (B) is a principal part side view before a cutting | disconnection, (C) is a principal part side view at the time of a cutting | disconnection and thermocompression bonding. . In embodiment, it is a schematic side view of the thermocompression-bonding head moving mechanism at the time of primary connection. It is a schematic side view of the thermocompression bonding head moving mechanism at the time of secondary connection. It is a top view of the inductance element obtained by embodiment. It is a schematic perspective view of the whole structure of the winding connection apparatus used by embodiment. It is a schematic side view at the time of supply of the drum core to the winding chuck mechanism in an embodiment. It is a schematic side view at the time of winding operation to the drum core of the wire in an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum core 2 Edge part 2a, 2b End electrode 3 Core part 5 Winding wire 6,8 Pusher 7 Support member 10 Winding unit 20 Winding chuck mechanism 30 Opening / closing claw 31 Fixing pin 40 Thermocompression-bonding head 44a, 44b Sharp edge 45 Drive motor 46 Feed screw 50 Supply chuck

Claims (5)

The wire on the outer peripheral surface of one collar of the drum core held by the winding chuck mechanism is subjected to primary wire processing, the wire is wound around the core of the drum core, and the electrode on the outer peripheral surface of the other collar A winding connection method of the drum core for performing the secondary connection processing of the wire,
An edge as a cutter blade is formed at the end position of the crimping surface of the thermocompression bonding head, and the wire is cut by the edge, and the wire is fixed to the electrode on the outer peripheral surface of the collar by thermocompression bonding. A method for winding a drum core, wherein the winding is performed in one operation.   Edges as cutter blades are formed at both ends of the crimping surface of the thermocompression bonding head, and the thermocompression bonding head is moved so that the primary joining process and the secondary joining process are the same heat. The method of winding a drum core according to claim 1, wherein the winding is performed at the same station using a crimping head. A winding chuck mechanism for holding a drum core having electrodes provided on both outer peripheral surfaces of the flanges, and a thermocompression bonding head in which an edge as a cutter blade is formed at an end position of the crimping surface;
A wire connecting device for a drum core, wherein the wire is cut by an edge of the thermocompression bonding head, and the wire is fixed to the electrode on the outer peripheral surface of the flange by thermocompression bonding at the crimping surface.   Edges as cutter blades are formed at both end positions of the crimping surface of the thermocompression bonding head, and the thermocompression bonding head is positioned from the position where the wire is subjected to primary connection processing to the electrode on one outer peripheral surface of the flange. 4. The winding connection device for a drum core according to claim 3, wherein the winding connection device for the drum core is provided so as to be movable by a moving means at a position where the wire on the other outer peripheral surface of the flange is subjected to the secondary wire processing.   The winding connection device for a drum core according to claim 3 or 4, wherein the thermocompression bonding head comprises a ceramic heater.

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