JP2014078641A - Laminated coil and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a laminated coil without labor and to reduce cost in the laminated coil where a plurality of annular conductive plates formed of conductive metals, in which a part is segmented by a slit, are laminated while sequentially offsetting positions of the slits and the conductive plates adjacent in a lamination direction are bonded on one side and the other side of the slit so that a current carrying route in a laminated state is made spiral.SOLUTION: A plurality of conductive plates 6 formed of composite materials where insulating films 7 softer than a metal material are attached on both faces of the metal material having conductivity are laminated by making the insulating films 7 attached to both faces of the conductive plate 6 face each other. One side of a slit 8 in one conductive plate 6 among the conductive plates 6 adjacent in a lamination direction and the other side of the slit 8 in the other conductive plate 6 are electrically connected and are bonded by a press fitting bonding section 5.

Description

  In the present invention, a plurality of conductive metal conductive plates that are annular and partly divided by slits are stacked while sequentially offsetting the positions of the slits, and the energization path in the stacked state is spiral. The present invention relates to a laminated coil in which the conductive plates adjacent in the laminating direction are joined on one side and the other side of the slit, and a method for manufacturing the laminated coil.

  When manufacturing a highly efficient coil, so-called edge-wise inductor coil, by winding a rectangular wire with a large winding cross-sectional area, the work of winding the rectangular wire one by one in sequence is Since the coil becomes thick, it is difficult to wind it up, requiring a manufacturing time, resulting in an increase in cost, and it is difficult to wind the coil tightly, so that it is difficult to finish the coil into a desired shape. In order to solve such problems, Patent Document 1 and Patent Document 2 show that a multilayer coil is obtained by sequentially joining and laminating a plurality of conductive plates having a desired annular shape. Are known.

JP 2004-363514 A JP 2001-167930 A

  In what is disclosed in Patent Document 1, a plurality of conductive plates having a ring shape and a part of which is divided by a slit at a start end and a terminal end are stacked while sequentially offsetting the positions of the slits. The end and the start of adjacent conductive plates are joined by welding or brazing. For this reason, in the case of welding, there is a possibility that the conductive plate will be deformed by the heat during welding. In the case of laser welding, appropriate air gap management must be performed, so the conductive plates are cured one by one. Thus, it is necessary to repeat the welding process, and it takes time to assemble the laminated coil. In addition, in the case of brazing, in order to prevent poor contact, it takes time to manage the joint surface, solder, and solder conditions, and when the conductive plate is a copper plate, copper may be dissolved in the solder. There are many materials of concern such as a decrease in fixing strength and transmission conductivity, which is troublesome.

  Moreover, in what was disclosed by patent document 2, the conductive plate and insulation material which are formed in C shape, U shape, or L shape are laminated | stacked alternately so that it may become spiral shape, and solder or electroconductivity as an electroconductive part The conductive plates are joined with a conductive adhesive. For this reason, if it is attempted to secure a predetermined thickness of the insulating plate in consideration of the insulation, the amount of solder or conductive adhesive used increases by the thickness of the insulating material, which is troublesome and expensive. Since it is not the structure which determines the position of an insulating material and a conductive plate, assembly will take time.

  SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a laminated coil that can be easily manufactured without taking time and cost reduction, and a laminated coil manufacturing method that can appropriately manufacture the laminated coil The purpose is to provide.

  To achieve the above object, the present invention provides a plurality of conductive metal conductive plates that are annular and partially divided by slits, and are stacked while sequentially offsetting the positions of the slits. In the laminated coil in which the conductive plates adjacent in the laminating direction are joined on one side and the other side of the slit in order to make the energization path in a spiral shape, both sides of the conductive metal material are more than the metal material. A plurality of the conductive plates formed of a composite material formed by depositing a soft insulating film are laminated with the insulating films deposited on both sides of the conductive plate facing each other, and are adjacent in the stacking direction. One side of the slit of one of the conductive plates and the other side of the slit of the other conductive plate are joined at a press-fit joint so as to obtain an electrical connection. Features

  According to the present invention, in addition to the configuration of the first feature, the press-fitting joint portion is formed on one of the conductive plates adjacent in the stacking direction and protrudes to the other conductive plate side and one side of the slit. Formed on the other conductive plate so as to receive the protrusion while peeling the portion covering the side surface of the protrusion of the insulating film and disposed on the other side of the slit The second feature is that it comprises a press-fitting hole.

  The present invention is a method of manufacturing a laminated coil for producing a laminated coil of the second feature, in which insulating films that are softer than the metal material are previously applied to both surfaces of a strip-shaped metal material made of a conductive metal. A protrusion forming step for forming the protrusions individually corresponding to the plurality of conductive plates in the composite material, and a press-fitting hole drilling for punching the press-fitting holes corresponding to the plurality of conductive plates individually in the composite material. A plurality of conductive plates each having an annular shape partly divided by slits and having the protrusions and the press-fitting holes on both sides of the slits, with the insulating film being adhered to both surfaces thereof; A cutting step of cutting out from the material, a stacking step of sequentially stacking the plurality of conductive plates cut out in the cutting step with the protrusions and the press-fitting holes corresponding to each other facing each other, and before the insulating coating A press-fit assembly process for forming a laminated coil by compressing a plurality of the conductive plates in a laminated state while pressing the protrusion into the press-fitting hole so as to peel off a portion covering the side surface of the protrusion, in a stacking direction; The third feature is to execute.

  Furthermore, in addition to the configuration of the third feature of the present invention, in the press-fitting assembly step, a plurality of the insulating films removed from the surface of the protrusion by peeling off by pressing into the press-fitting hole of the protrusion are removed. The fourth feature is to compress and hold between the conductive plates.

  According to the first feature of the present invention, a plurality of conductive plates are formed from a composite material in which an insulating film is deposited on both surfaces of a conductive metal material and the insulating film is still formed on both surfaces. Are laminated while facing the insulating film, and one side of the slit of one conductive plate among the conductive plates adjacent in the stacking direction and the other side of the slit of the other conductive plate are joined at the press-fit joint, Time-consuming work such as welding or soldering is unnecessary, and an inexpensive laminated coil can be obtained.

  Further, according to the second feature of the present invention, the press-fitting joint portion is constituted by a protrusion disposed on one side of the slit and a press-fitting hole disposed on the other side of the slit and press-fitting the protrusion. Since the electrical connection between the conductive plates adjacent in the stacking direction can be easily achieved, and when the protrusion is press-fitted into the press-fitting hole, the portion of the insulating film that covers the side of the protrusion peels off. In addition, in order to obtain electrical connection between a plurality of conductive plates laminated with the insulating film applied on both sides, a laborious work such as peeling off and removing a part of the insulating film is unnecessary. An inexpensive laminated coil can be obtained.

  According to the third feature of the present invention, the protrusion forming step of forming the protrusion on the composite material in which the insulating film is previously applied to both surfaces of the metal material, and the composite material individually correspond to the plurality of conductive plates. A press-fitting hole perforating step for perforating the press-fitting hole, a cutting-out step of cutting out the plurality of conductive plates from the composite material with the insulating coatings on both surfaces thereof, a plurality of the conductive plates corresponding to each other, and A stacking process in which the press-fitting holes are opposed to each other, and a plurality of conductive plates are compressed in the stacking direction while pressing the protrusions into the press-fitting holes so that the portions of the insulating film covering the side surfaces of the protrusions are peeled off. Thus, the press-fit assembly process for forming the laminated coil is executed, so that a dedicated process for removing a part of the insulating film is not required, the manufacturing process can be shortened, and the laminated coil can be manufactured at low cost.

  Furthermore, according to the fourth feature of the present invention, the insulating film peeled off by press-fitting into the press-fitting hole and removed from the surface of the protrusion is compressed and held between the conductive plates, so that the work of removing the peeled insulating film is performed. This is unnecessary and the manufacturing process can be further shortened.

It is a longitudinal cross-sectional view which shows a part of laminated coil. It is a figure which arranges and shows a conductive plate in order of lamination, in order to show the shape of a conductive plate. It is a figure which simplifies and shows the manufacturing apparatus of a laminated coil.

  The embodiment of the present invention will be described below with reference to FIGS. 1 to 3. First, in FIG. 1, the laminated coil is composed of a plurality of conductive plates 6 having a rectangular cross section made of a conductive metal such as copper. Are laminated and joined so that the energization path is spiral, while the insulating coatings 7, 7, 7... Deposited on both surfaces of the conductive plates 6, 6, 6. It is made up of.

  In FIG. 2, the conductive plates 6, 6, 6... Are annular and have a shape that is partly divided by slits 8, 8, 8... A part of the conductive plate 6 formed in the step is divided by the slit 8.

  In addition, each of the conductive plates 6, 6, 6,... Having the insulating films 7, 7, 7,. .. Of the conductive plate 6, 6 adjacent to each other in the stacking direction, and one side of the slit 8 of the conductive plate 6 and the slit 8 of the other conductive plate 6. The other side is joined by press-fit joints 5, 5, 5... So as to obtain electrical connection.

  The press-fitting joint 5 is formed on one of the conductive plates 6 adjacent in the stacking direction and protrudes toward the other conductive plate 6 and is disposed on one side of the slit 8 and the insulation A press-fit hole 10 formed on the other conductive plate 6 and disposed on the other side of the slit 8 so as to receive the protrusion 9 while peeling off a portion of the coating 7 covering the side surface of the protrusion 9. Are arranged on one side of the slits 8, 8, 8... Excluding the conductive plates 6, 6 at both ends in the laminating direction and projecting to one side in the laminating direction. Are provided with projections 9, 9, 9 ... and press-fitting holes 10, 10, 10 ... arranged on the other side of the slits 8, 8, 8 ... so as to receive the projections 9, 9, 9 ... It is done.

  As shown at the left end position in FIG. 2, the conductive plates 6 and 6 at both ends in the stacking direction are provided with connection terminal portions 6a... Extending outward to connect the completed stacked coil to an external circuit. Only one of the protrusion 9 and the press-fitting hole 10 is provided, and neither the protrusion 9 nor the press-fitting hole is provided.

  When manufacturing a laminated coil, a manufacturing apparatus as shown in FIG. 3 is used. This manufacturing apparatus is softer than the metal material 22 on both sides of a strip-shaped metal material 22 made of a conductive metal such as copper. A straightening device 17 for correcting the composite material 11 wound around the roll 16 in a state in which the insulating film 7 made of an enamel resin or the like is applied in advance through a plurality of pairs of rollers 12, 13. And a feeding device 18 that feeds the composite material 11 that has passed through the straightening device 17 between upper and lower rollers 14 and 15 and a partial press process on the composite material 11 that is sent from the feeding device 18. .. To be performed, and after pressing in the progressive press device 19, the conductive plates 6, 6, 6... Are punched into the mold frame with the insulating films 7, 7, 7. After being laminated Are stacked in the stacking direction by press-fitting and assembling a plurality of the conductive plates 6, 6, 6... And a carrying-out device such as a conveyor for carrying out the laminated coils produced by the press-fitting assembly in the laminating apparatus 20. A series of operations of the correction device 17, the feeding device 18, the progressive press device 19, the laminating device 20, and the carry-out device are automatically controlled by the control device 21.

  The progressive press device 19 that performs partial pressing on the composite material 11 performs a protrusion forming step, a press-fitting hole punching step, and a cutting step. The progressive press device 19 executes a step of drilling a positioning hole in the composite material 11 at a portion that becomes waste caused by cutting out the conductive plates 6, 6, 6... From the material 11. The positioning holes are drilled in, for example, four corners around the rectangular conductive plates 6, 6, 6, and the positioning pins provided in the progressive press device 19 are fitted into the positioning holes, The composite material 11 sent from the feeding device 18 is surely positioned and held at the time of press processing by the progressive press device 19. Thereby, the conductive plates 6, 6, 6... With high accuracy are formed, and as a result, the laminated coil is manufactured with high accuracy.

  In the projecting portion forming step, the projecting portions 9, 9, 9,... Individually corresponding to the plurality of conductive plates 6, 6, 6,. It is a step of forming the composite material 11 so as to protrude from one surface as it is.

  In the press-fitting hole drilling step, the composite material 11 and the press-fitting holes 10, 10, 10... Individually corresponding to the plurality of conductive plates 6, 6, 6,. 7 is a step of drilling so as to penetrate 7.

  Thus, the progressive press device 19 forms the protrusions 9 in the protrusion forming step in the composite material 11 where the conductive plate 6 located at one end in the stacking direction of the laminated coil is formed. In the press-fitting hole drilling step, the press-fitting hole 10 is not drilled, and in the portion of the composite material 11 where the conductive plate 6 located at the other end in the stacking direction is formed, the press-fitting hole drilling step is performed. Although the 10 is perforated, the protrusion 9 is not formed in the protrusion forming step.

  The cutting step is an annular part of which is partially divided by slits 8, 8, 8... And the projections 9, 9, 9... And the press-fitting holes 10, 10, 10. Are cut out from the composite material 11 while the insulating coatings 7, 7, 7... Are attached to both sides of the plurality of conductive plates 6, 6, 6.

  Further, the progressive press device 19 includes the composite material with the insulating films 7, 7, 7... Attached to both surfaces of the conductive plates 6, 6 positioned at both ends in the lamination direction in the laminated coil in the cutting process. When cutting out from 11, the conductive plates 6 and 6 are cut out so as to integrally have the connection terminal portions 6a.

  In order to easily convey the conductive plates 6, 6, 6,... From the progressive press device 19 to the laminating device 20, after the cutting process in the progressive press device 19, In order to keep the conductive plates 6, 6, 6 ... still in the composite material 11 even after the approximate inner shape of the conductive plates 6, 6, 6 ... is formed, The conductive plates 6, 6, 6... Remain connected by narrow branches (not shown).

  In the protrusion forming step, since the composite material 11 gathers around the protrusions 9, 9, 9 ... when forming the protrusions 9, 9, 9 ..., the inner shape of the conductive plates 6, 6, 6 ... It is desirable to form the protrusions 9, 9, 9 ... prior to the cutting step of cutting out the outer shape.

  The laminating apparatus 20 executes a laminating process and a press-fitting assembly process after the press working in the progressive press apparatus 19, and the laminating process includes a plurality of sheets cut out in the cut out process in the progressive press apparatus 19. Of the conductive plates 6, 6, 6... Are sequentially laminated with the protrusions 9, 9, 9... And the press-fitting holes 10, 10, 10.

  In the press-fitting assembly process, the protrusions 9, 9, 9 ... are removed from the insulating coatings 7, 7, 7 ... by covering the side faces of the protrusions 9, 9, 9 ... with the press-fitting holes 10, 9, 9 ... Is a process of forming a laminated coil by compressing the plurality of conductive plates 6, 6, 6... In a laminated state in the laminating direction from above or below by hydraulic pressure or the like while being press-fitted into 10, 10. In this press-fit assembly process, one side of one slit 8 of the conductive plates 6 and 6 adjacent in the stacking direction and the other side of the slit 8 of the other conductive plate 6 are electrically connected. Joining is performed at the press-fitting joint 5.

  Moreover, in the press-fitting assembly step, the insulating film 7 is peeled off by press-fitting the protrusions 9, 9, 9 ... into the press-fitting holes 10, 10, 10 ... and removed from the side surfaces of the protrusions 9, 9, 9 ... , 7, 7... Are compressed and held between the plurality of conductive plates 6, 6, 6.

  Next, the operation of this embodiment will be described. The laminated coil has an annular shape and a plurality of conductive plates 6, 6, 6... Having a shape partly divided by slits 8, 8, 8. The slits 8, 8,... Are stacked while being sequentially offset, and one side of the slit 8 of the conductive plate 6 of the conductive plates 6 and 6 adjacent in the stacking direction and the other Since the other side of the slit 8 of the conductive plate 6 is joined by the press-fit joint 5 so as to obtain an electrical connection, laborious work such as welding, adhesion or soldering is unnecessary. In addition, an inexpensive laminated coil can be obtained by easily obtaining an electrical connection in which the energization path is spiral.

  In addition, the conductive plates 6, 6, 6... Are formed from a composite material 11 in which an insulating film 7 that is softer than the metal material 22 is deposited on both surfaces of a conductive metal material 22. It is not necessary to sandwich a separate insulating material between the plates 6, 6, 6.

  In addition, the press-fitting joint 5 is formed on one of the conductive plates 6 and 6 adjacent in the stacking direction, protrudes toward the other conductive plate 6, and is disposed on one side of the slit 8. The press-fitting formed on the other conductive plate 6 and disposed on the other side of the slit 8 so as to receive the protrusion 9 while peeling the portion of the insulating film 7 that covers the side surface of the protrusion 9. Since it is composed of the hole 10, the electrical connection between the conductive plates 6 and 6 adjacent in the stacking direction can be easily achieved, and when the protrusion 9 is press-fitted into the press-fitting hole 10, Since the part which covered the side surface of the protrusion 9 peels, the electrical connection between the plurality of conductive plates 6, 6, 6... Laminated with the insulating films 7, 7. In the process of peeling and removing a part of the insulating film 7, 7, 7 ... Consuming tasks are not required, thereby making it possible to obtain an inexpensive laminated coil.

  Further, in manufacturing a laminated coil, a plurality of the conductive plates 6 are attached to the composite material 11 in which the insulating film 7 softer than the metal material 22 is previously applied to both surfaces of the band-shaped metal material 22 made of a conductive metal. ... the protrusions 9, 9, 9 ... individually corresponding to 6, 6 ..., and the press-fitting individually corresponding to the plurality of conductive plates 6, 6, 6 ... in the composite material 11. A press-fitting hole drilling step for perforating the holes 10, 10, 10..., And an annular part of which is divided by slits 8, 8, 8, and the protrusions 9, 9, 9. , 10... Are formed on the both sides of the slits 8, 8, 8... From the composite material 11 with the insulating films 7, 7. A cutting step for cutting out, and a plurality of the guides cut out in the cutting step. A stacking step of sequentially stacking the plates 6, 6, 6... And the press-fitting holes 10, 10, 10. , 7... Are stacked while the protrusions 9, 9, 9... Are press-fitted into the press-fitting holes 10, 10, 10. Are pressed and assembled to form a laminated coil by compressing a plurality of the conductive plates 6, 6, 6... In the laminating direction, so that a part of the insulating films 7, 7, 7. The manufacturing process can be shortened by eliminating the need for work, and the laminated coil can be manufactured at low cost.

  Further, in the press-fitting assembly process, the insulating film 7 is peeled and removed from the side surfaces of the protrusions 9, 9, 9 ... by being pressed into the press-fitting holes 10, 10, 10 ... of the protrusions 9, 9, 9 ... 7 and 7 are compressed and held between the plurality of conductive plates 6, 6, 6... So that the work of removing the peeled insulating films 7, 7, 7. can do.

  Furthermore, the control device 21 automatically controls a series of operations of the correction device 17, the feeding device 18, the progressive press device 19, the lamination device 20, and the carry-out device for producing the laminated coil, thereby efficiently producing the laminated coil. be able to.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

5 ... Press-fit joint 6 ... Conductive plate 7 ... Insulating film 8 ... Slit 9 ... Projection 10 ... Press-fit hole 11 ... Composite material 22 ... Metal material

Claims (4)

  A plurality of conductive metal conductive plates (6) that are annular and partly divided by slits (8) are stacked while sequentially offsetting the positions of the slits (8), and energization in the stacked state is performed. In the laminated coil in which the conductive plates (6) adjacent in the laminating direction are joined on one side and the other side of the slit (8) so as to make the path spiral, both surfaces of the conductive metal material (22). A plurality of the conductive plates (6) formed of a composite material (11) formed by coating an insulating film (7) softer than the metal material (22) on the conductive plate (6) One side of the slit (8) of one of the conductive plates (6) of the conductive plates (6) adjacent to each other in the stacking direction is laminated while facing the insulating coating (7) deposited on both sides. , The other side of the slit (8) of the other conductive plate (6) Laminated coil, characterized in that it is joined by press-bonding portion so as to obtain electrical connection (5).   The press-fitting joint (5) is formed on one of the conductive plates (6) adjacent in the stacking direction, protrudes to the other conductive plate (6) side, and is disposed on one side of the slit (8). The protruding portion (9) and the other conductive plate (6) so as to receive the protruding portion (9) while peeling the portion of the insulating film (7) covering the side surface of the protruding portion (9). 2. The laminated coil according to claim 1, further comprising a press-fit hole (10) formed on the other side of the slit (8).   A method for manufacturing a laminated coil for producing a laminated coil according to claim 2, wherein the insulating film (7) is softer than the metal material (22) on both surfaces of a strip-shaped metal material (22) made of a conductive metal. ) Forming a protrusion (9) individually corresponding to a plurality of the conductive plates (6) on the composite material (11) previously deposited, and a plurality of the composite material (11) A press-fitting hole drilling step for punching the press-fitting hole (10) individually corresponding to the conductive plate (6), and an annular part of which is divided by a slit (8), and the protrusion (9) and the press-fitting A cutting step of cutting out the plurality of conductive plates (6) having holes (10) on both sides of the slit (8) from the composite material (11) with the insulating film (7) adhered on both sides thereof; The plurality of conductive plates (6) cut out in the cutting step A stacking step of sequentially stacking the protrusions (9) and the press-fitting holes (10) corresponding to each other, and a portion of the insulating film (7) that covers the side surfaces of the protrusions (9). A press-fitting assembly process for forming a laminated coil by compressing the plurality of conductive plates (6) in a laminated state while pressing the protrusion (9) into the press-fitting hole (10) so as to be peeled off. The manufacturing method of the laminated coil characterized by performing these.   In the press-fitting assembly step, the insulating film (7) peeled off by press-fitting the protrusion (9) into the press-fitting hole (10) and removed from the side surface of the protrusion (9) is removed from the plurality of conductive plates ( 6. The method for producing a laminated coil according to claim 3, wherein the compression and holding are performed between 6).

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