JP2006303334A - Manufacturing method of wound core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a wound core made of an amorphous magnetic thin strip to include a simple scattering prevention means for preventing a fragment of the thin strip from scattering to the outside. <P>SOLUTION: A manufacturing method of the wound core includes a step of circularly winding the amorphous magnetic thin strip by a predetermined number of times by a one-cut-turn method to form an element of the wound core, a step of forming the element of the wound core into a rectangular shape by a molding tool, a step of annealing the element formed in a rectangle in a magnetic field, a step of applying adhesive to a magnetic leg of the annealed rectangular wound core and a wound end surface of a magnetic yoke that does not contain joints, a step of pasting an insulation pasting member to the wound end surface with the adhesive applied; a step of extending the magnetic yoke having the joint of the wound core and covering the yoke having the wound core opened into a U shape with a cover cloth; a step of assembling the wound core opened into the U shape into winding, uncovering the cover cloth from the magnetic yoke having the joint, and rejoining the yoke having the joint; and a step of re-covering the rejoined yoke of the magnetic yoke with the uncovered cloth. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in a method for manufacturing a one-turn cut type wound iron core made of an amorphous magnetic alloy ribbon.

Conventionally, a one-turn cut type wound iron core using an amorphous magnetic alloy ribbon (hereinafter referred to as a magnetic ribbon) has, for example, a plurality of unit cores obtained by cutting a magnetic ribbon every turn cut (several numbers) The unit laminated iron core is provided in a unit of 10 sheets, and the unit laminated iron core is further laminated into a plurality of layers to form a unit laminated block (hereinafter simply referred to as a laminated block). butt while shifting the ends of the unit laminated core wound sequentially stepwise in a circular shape, or, joined by overlapping, followed, the laminated block, further, a predetermined laminated by a predetermined number of layers wound-layered A thick one-turn cut wound core was formed.

  The one-turn cut type wound core wound and laminated as described above is subjected to magnetic field annealing after being formed into a rectangular shape with the joint portion positioned on one of the yoke portions. After annealing, the wound iron core opens the joint of the yoke part for each laminated block and opens it in a U shape, and inserts each laminated block into the core insertion hole of the winding sequentially for each laminated block. The wound core was assembled by rejoining the joint every time.

  However, when manufacturing the one-turn cut type wound core, there are the following problems. First, since the magnetic thin body has poor rigidity and is very weakened by annealing, as described above, when the core is assembled by sequentially dividing each laminated block and inserting it into the winding, When the laminated block collides with the winding, the corners and the winding end face of the wound iron core are lost or peeled off, resulting in fragments. Since this fragment is conductive, if it remains in the core insertion hole of the winding or the winding end face, it will penetrate into the layers of the winding, for example, during the operation of the transformer, causing an interlayer short circuit accident. There was a problem.

  Secondly, since the magnetic ribbon is poor in rigidity, when the laminated blocks are individually divided and assembled, the shape at the time of rectangular molding is temporarily broken, and each laminated block is greatly expanded at its joint and inserted into the winding. Since the rear joint was rejoined, the wound core may be deformed by its own weight, or internal distortion may occur, adversely affecting the magnetic properties. Therefore, the assembly work of the wound core must be performed with great care. There was a problem that assembly work could not be performed efficiently.

  Thirdly, the magnetic ribbon is manufactured to be extremely thin, and it is extremely weakened by annealing. Therefore, if each layer block is layered into the winding in order and incorporated, it will be in a crushed state. For this reason, since the laminated block of the wound core inserted into the winding was made to stand on its own with a special jig until the next laminated block was inserted, the assembly work efficiency of the wound core was very poor. It was a major factor that hindered the mass productivity of the seed winding core.

  In order to solve the above problem, for example, Japanese Patent Application Laid-Open No. 7-161559 discloses a countermeasure against debris in a wound iron core formed by winding a magnetic ribbon. A method for manufacturing a wound iron core with a countermeasure against debris disclosed in Japanese Patent Laid-Open No. 7-161559 will be described with reference to FIGS.

  In FIG. 7, the wound core body 14 is wound on a winding machine (not shown) by a cutting device (not shown) every time it is wound on a winding machine (not shown). A wound core element body 14 is formed which is the original shape of a cut transformer core. The wound core body 14 is removed from the winder after winding, and a silicon steel plate thicker than the magnetic ribbon is wound on the outer circumference for one turn, and the free end is temporarily fixed with an adhesive tape or the like. A reinforcing frame 16 is provided. Also, on the inner peripheral surface of the wound iron core body 14, a ring-shaped inner reinforcing frame 17 is formed within a range where one turn is not formed using a silicon steel plate, and the outer reinforcing frame is inserted into the wound iron core body 14. 16 and the circular state of the wound core body 14 are maintained.

  Next, the wound core body 14 is linearly pressed from the front, rear, left, and right directions by a pressing means such as a press with plate-shaped molded plates 19 and 20 (see FIG. 8) to form an oval shape. While deforming and maintaining this state, a pair of molding dies 21 and 22 are inserted facing each other at a position corresponding to the yoke portion 12 in the wound core body 14 window. When the plate-shaped mold 24 (see FIG. 8) is press-fitted between the molding dies 21 and 22 (see FIG. 8) by a press, the wound core element body 14 deformed into an oval shape is formed into a molded plate. Combined with the pressing effect of 19 and 20, as shown in FIG. 8, it is molded into a rectangular shape.

  After forming the wound core element body 14 into a rectangular shape, the molding plates 19 and 20 are fixed by fastening bolts (not shown), and the pressing force applied to the molding plates 19 and 20 by pressing or the like is released. As shown in FIG. 8, the wound core body 14 is formed by holding the molding plates 19 and 20 so as not to be disassembled by fastening bolts and the pressing force of the mold plate 24 press-fitted between the molding dies 21 and 22. The rectangular state can be maintained satisfactorily.

  As described above, after forming the wound core body 14 into a rectangular shape, the wound core body 14 is put into an annealing furnace and subjected to magnetic field annealing. After the magnetic field annealing, in FIG. 8, the clamping of the molding plates 19 and 20 is released and removed from the wound core body 14, and the mold 24 is extracted from between the molding dies 21 and 22. By removing 22 from the wound core body 14, a one-turn cut wound core 27 shown in FIG. 9 is formed. In addition, the wound core 27 after annealing can maintain a favorable rectangular state by the inner and outer reinforcing frames 16 and 17 provided inside and outside thereof.

  Next, in FIG. 9, the rectangularly shaped wound iron core 27 has a second molding die 28, 29 arranged on the yoke part e, f side in the window, and a plate between the molding dies 28, 29. The shaped stencil plate 30 is press-fitted to prevent the wound iron core 27 from receiving an external force and causing the rectangular state to collapse. After the treatment to prevent the shape collapse, as shown in FIG. 9, a room temperature curable adhesive is fixed in the length direction of the leg portion d on both sides of the winding end surface of the leg portion d of the wound core 27. The adhesive part 31 is formed by applying a plurality of positions while maintaining the interval.

  Thereafter, before the adhesive is cured, a thin insulating paper is wound several times around the entire circumference of the leg portion d, and the final winding end face is adhered with an adhesive to form the insulation reinforcing portion 32. After the insulation reinforcing portion 32 is formed, the second molded fittings 28 and 29 and the template 30 are removed from the wound iron core 27 (see FIG. 10).

  As described above, since the insulation reinforcing portion 32 is formed on the leg iron portion d of the wound iron core 27, it is possible to prevent the corner portion of the winding end surface of the leg iron portion d from being peeled off and the wound iron core 27. The inner and outer reinforcing frames 16 and 17 disposed on the inner and outer peripheral surfaces of the inner and outer peripheral surfaces of the wound iron core 27 can improve the rigidity of the leg portions d and the yoke portions f.

  Subsequently, the wound core 27 is released from the adhesive tape that temporarily fixes the free end of the outer reinforcing frame 16 wound around the outer periphery thereof, and the free end is substantially the same as the leg iron portion d of the wound core 27. Expand to a position on the line. Since the outer reinforcement frame 16 is thicker than the magnetic ribbon and the annealing temperature is higher than that of the magnetic ribbon, the elasticity remains as compared with the magnetic ribbon, so that the free end can be easily opened. .

  When the outer reinforcing portion 16 is opened, the joint portion b (see FIG. 10) of the wound iron core 27 is subsequently expanded, and the yoke portion e reaches a position substantially collinear with the leg iron portion d as shown in FIG. Open up to. That is, the wound iron core 27 is opened so that the planar shape is U-shaped as shown in FIG. The yoke part e is opened by the presence of the insulation reinforcement part 32 formed in the leg part d and the inner / outer reinforcement frames 16 and 17, so that the wound iron core 27 is sufficiently rigid. The portion e can be opened and held smoothly in a U shape without undergoing its own weight deformation or deformation.

  Subsequently, as shown in FIG. 11, a cap-shaped insertion having a sharp tip formed by using a metal plate at the tip of the pair of yoke portions e of the wound iron core 27 expanded in the U-shape. Each of the protective caps 38 is covered to prevent the tip end of the yoke portion e from coming into contact with the axial end surface of the winding and being damaged when the wound core 27 is inserted into the winding. When the insertion protection cap 38 is put on the yoke portion e, the tubular insulation member 39a formed of a nonwoven fabric is inserted over the expanded yoke portion e in a state where the length dimension is reduced in the length direction. 12 is passed through from the outside of the protective cap 38, and then the contracted insulating member 39a is connected to the yoke portion f side while wrapping the insulating reinforcing portion 32 provided in the leg portion d in FIG. In such a manner, the insulation reinforcing portion 32 of the leg portion d extends over the yoke portion f so as to be expanded (stretched) sequentially.

  Then, the insulating member 39a is covered from the leg portion d to the yoke portion f, and the overlapping portion of the insulating member 39a that is polymerized in the yoke portion f is fastened with an adhesive tape or the like, so that the insulating members 39a are separated from each other. By preventing the covering position from shifting, the first covering portion 39 is formed (see FIG. 13).

  When the first covering portion 39 is formed, the second covering portion 40 is subsequently formed. As shown in FIG. 14, the second covering portion 40 is inserted through the yoke portion e at a position corresponding to the yoke portion e in a state in which two end portions of the wide covering cloth 40 a are overlapped 40 b. A window hole 41 is provided, and a flange edge 42 is formed on the periphery of the window hole 41 to be adhered to the leg portion d. Then, as shown in FIG. 15, the covering cloth 40a passes through the yoke portion e through the window hole 41 through the insertion protective cap 38, and opens the window at the base portion of the first covering portion 39 covered with the leg iron portion d. The flange 42 provided on the periphery of the hole 41 is superposed and adhered.

  That is, by winding the adhesive tape 43 across the flange 42 of the covering cloth 40a and the first covering cloth 39, as shown in FIG. Attach to. As shown in FIG. 16, the covering cloth 40 a is insulated on the leg portion d of the first covering portion 39 including the flange 42, after the heel edge 42 is attached to the first covering portion 39. The second insulation reinforcing portion 32a is formed by winding paper, and in this state, the covering cloth 40a is folded toward the yoke portion e so as to cover the yoke portion e, as shown in FIG. Then, the second covering portion 40 is formed by temporarily wrapping the entire yoke portion e while leaving the pointed portion of the insertion protection cap 38. In FIG. 17, 44 is a rubber band which stops the free end of the temporarily wrapped covering cloth 40a.

  As described above, when the first and second covering portions 39 and 40 are formed on the wound core 27, the wound core 27 expanded in a U shape in the core insertion hole (not shown) of the winding 48 is The leg portion d is fitted into the winding 48 by inserting from the yoke portion e. When the winding core 27 is inserted into the winding 48, the winding core 27 itself is formed with the first and second covering portions 39, 40. Therefore, the winding core 27 is deformed by its own weight or has a magnetic ribbon. It can be quickly and easily inserted into the core insertion hole of the winding 48 without peeling off.

  When the winding core 27 is inserted into the winding 48, the temporary wrapping by the covering cloth 40a of the second covering portion 40 that temporarily wraps the yoke portion e protruding from the winding 48 is unwound and expanded to the original state. 48 is placed on the winding end face side (see FIG. 18). Subsequently, the insertion protective cap 38 inserted in the yoke portion e is removed, and as shown in FIG. 18, the state before the expansion from the innermost layer portion of the yoke portion e of the wound core 27, that is, the joint portion. As shown in FIG. 18, the end edge h is bent inwardly to rejoin the joint b of the wound core 27.

  As described above, the expanded yoke portion e is sequentially rejoined, and the free ends of the outer reinforcing frame 16 are overlapped and fixed by welding or the like (see FIG. 19). Thereafter, the covering cloth 40a of the second covering portion 40 covered on the end face side of the winding 48 is returned to the rejoined yoke portion e side, folded so as to wrap the yoke portion e, and the overlapping thereof. As shown in FIG. 20, the second covering portion 40 is re-formed by fixing the portion with the adhesive tape or the like on the outer peripheral surface of the yoke portion e and completely covering the yoke portion e of the wound core 27. To do.

  Then, after re-forming the second covering portion 40, as shown in FIG. 20, the insulating paper 54 is wound around the outer peripheral surface of the wound core 27, so that the first and second covering portions 39, 40 are fixed. By preventing the part from peeling off, the assembly of the wound core 27 is completed (see Patent Document 1).

Japanese Patent Laid-Open No. 7-161559

  In the above-described wound iron core manufacturing method, when a wound iron core that has become brittle due to magnetic field annealing is incorporated into a winding, the leg iron portion of the wound iron core has a cylindrical shape extending from the leg iron portion to the yoke portion having no joint. The first covering portion is formed by covering through the insulating member, and the yoke portion having the joint portion is covered with a metal insertion protective cap, and the yoke portion having the joint portion and the yoke portion A wound iron core made of a magnetic thin ribbon is manufactured by covering a part of the leg iron part adjacent to the wire with a covering cloth made of a non-woven fabric to form a second covering portion and incorporating it into the winding. Because the method is adopted, when the wound iron core is incorporated into the winding, the wound iron core itself includes the insulation reinforcing portion and the first and second coverings, even though the wound iron core is opened in a U shape. It is completely covered with the part and is not exposed to the outside Therefore, even if it receives external force, the fragments of the magnetic ribbon do not scatter to the outside, so the assembly work can be performed smoothly, but the wound iron core is completely covered with insulating paper or nonwoven fabric, Covering work requires labor and time, and a large amount of covering members are used, which increases the manufacturing cost of the wound core as well as the manufacturing process, and the manufacturing cost of the transformer using this wound core. Inevitably raised the problem.

  Moreover, since the wound core itself is completely covered with the insulator as described above, when the transformer is assembled using the wound core, the entire wound core is covered with the insulator. When installed, it cannot be grounded. For this reason, until now, since the ground terminal was inserted into the wound core side from the outside of the insulator and brought into direct contact with the wound core, the installation of the ground terminal was very troublesome. In addition, since the ground terminal was in contact with the wound iron core through the insulator, the hole of the insulator that was generated by inserting the ground terminal was closed by using an adhesive or the like later. In addition to requiring a grounding terminal for grounding the transformer, it took time and effort to install the grounding terminal, which inevitably increased the manufacturing cost of the transformer.

  In view of the above-described various problems, the present invention provides a wound core that can be manufactured quickly, easily, and economically by applying a simple countermeasure against the broken core of a transformer using a magnetic ribbon. It aims at providing the manufacturing method of.

  According to the first aspect of the present invention, a step of forming a wound core body by winding an amorphous magnetic ribbon into a circular shape a predetermined number of times by a one-turn cut method, and a wound core body wound in the step A step of forming a rectangular shape using a forming jig, a step of subjecting the rectangular core body to a magnetic field to magnetic field annealing, and a yoke having no legs and joints of the rectangular wound core subjected to the magnetic field annealing. The step of applying an adhesive to the winding end surface of the part, the step of attaching an insulating adhesive member to the winding end surface applied with the adhesive, and the side of the yoke having the joint of the wound core A step of covering the yoke part with the U-shaped open iron core covered with a covering cloth, and after incorporating the U-shaped coiled iron core into the winding, A step of unbonding the coated cloth and rejoining the yoke portion having the joint portion; and after rejoining the yoke portion, Characterized by comprising the step of re-covered with solved coating coated fabric.

  According to a second aspect of the present invention, there is provided a wound iron core manufacturing method according to the first aspect, wherein the winding end surface of the yoke portion coated with the adhesive and the yoke portion having no joint portion has a U-shape. The insulation sticking member formed in the shape is stuck and the winding end surface and inner peripheral surface of the said leg iron part and a yoke part were coat | covered, It is characterized by the above-mentioned.

  According to a third aspect of the present invention, in the method of manufacturing a wound core according to the first aspect, the adhesive iron is applied to the wound end surface of the yoke part having no joints and the leg part of the wound core coated with the adhesive. The members are individually attached to cover the leg portion and the yoke portion.

  In the invention of claim 1, as in the prior art, the yoke part having no legs and joints without covering the wound iron core subjected to magnetic field annealing with two or three layers of insulators, At the yoke part of the wound iron core with the insulation sticking member attached to the winding end face and having the joint part, the wound iron core is incorporated into the winding in a state where the covering cloth is temporarily wound after the expansion, and then joined. The joint part having a part is rejoined by unwinding the temporary winding with the covering cloth, and after the rejoining of the yoke part, the yoke part having the joining part is wrapped in the covering cloth to form a wound core. As a result, the wound core is convenient because it can minimize the use of insulating members as a countermeasure against debris, and the use of insulating members can be greatly suppressed, making the process of assembling the wound core easier. Can be reduced. In addition, since there is no insulating member on the outer peripheral surface of the wound core as in the prior art, by using this outer peripheral surface, the transformer core can directly use the wound core itself. Because there is no need to attach a ground terminal to the wound core for grounding the transformer, this kind of wound core can be easily assembled in a short time with a small number of parts. Has an effect.

  In invention of Claim 2, the U-shaped insulation sticking member is stuck on the winding end surface of the yoke part which does not have a leg iron part and junction part of a wound iron core, and the said leg iron part and a yoke part Since the winding end face and the inner peripheral surface are covered, the sticking work of the insulating sticking member can be stuck in almost one operation as compared with the case of winding the insulating member as in the prior art. Convenient. In addition, since there is no insulating adhesive member on the outer peripheral surface of the wound core, there is an advantage that the wound core can be easily grounded.

  According to the invention of claim 3, since the insulating adhesive member is individually attached to the winding end surface of the wound iron core, the insulating adhesive member is wound around the wound iron core as compared with the conventional case where the insulating member is wound. It is possible to adhere well to the wound iron core at the location where it is attached, and to adhere closely, so that the insulating member wound around the wound iron core bulges as in the case of winding the insulating member. This is an obstacle to inserting the wound core into the winding, and it takes time to insert the wound core into the winding, or the winding core itself is inside the insulating member and the corner is impacted when inserted into the winding. Therefore, the assembly work of the wound core should be performed easily and quickly without damaging the wound core by using a small number of insulating members. It also has the excellent effect of being able to.

  Embodiments of the present invention will be described below with reference to FIGS. In the present invention, the same reference numerals as those described in the prior art indicate the same parts. Moreover, in the manufacturing method of the wound core described as the prior art, a manufacturing method in which a part of the manufacturing method can be applied also in the present invention will be described with reference to the drawings used in the description of the prior art. .

  In the present invention, a predetermined number of amorphous magnetic alloy ribbons (hereinafter referred to as “magnetic ribbons”) are stacked on a winding frame and cut by a cutting device every time it is wound around a winding frame. A step of forming the wound core element body 14 of the cut type (see FIG. 7), a pair of molding dies 21, 22 and a plate-like shape interposed in the window of the wound core element body 14 wound in a circle A step of forming the wound core body 14 into a rectangular shape by using the frame 24 and a pair of molding plates 19 and 20 that press the outer side of the wound core body 14 in the center direction from the front, rear, left, and right directions (see FIG. 8) and the description of the step of magnetically annealing the rectangular shaped wound core body 14 are the same as those already described in the description of the prior art, and will be omitted.

  Next, a case will be described in which the wound core element body 14 that has been subjected to the magnetic field annealing is provided with a countermeasure against a fragment of a magnetic ribbon that is generated during assembly into the winding. In FIG. 8, the wound core body 14 after the magnetic field annealing is formed into a rectangular shape by performing the magnetic field annealing, so that the molding plates 19 and 20 and the molding dies 21 and 22 before the annealing are performed. Even if the mold 24 is removed, the rectangular shape is maintained by the magnetic field annealing and the presence of the inner and outer reinforcing frames 16 and 17. As a result, the wound core body 14 is shown in FIG. A one-turn cut type wound core 27A is obtained.

  As described above, after forming the wound core element body 14 into a rectangular shape and magnetic field annealing, as shown in FIG. 1, the second molding dies 28 and 29 are placed on the yoke portions e and f side in the window of the wound core 27 </ b> A. And the shape plate 30 is press-fitted between the molding dies 28 and 29 using the concave grooves provided in the molding dies 28 and 29, and the wound iron core 27A is deformed by receiving external force. Or the inner and outer reinforcing frames 16 and 17 are prevented, and the rectangular shape of the wound core 27A is maintained.

  After the second molding dies 28 and 29 and the template 30 are attached, room temperature curing is performed on the winding end surfaces on both sides of the pair of leg portions d excluding the yoke portion e having the joint b of the wound core 27A. The adhesive part 31A is provided by applying the adhesive with a brush. When applying the adhesive, as shown in FIG. 1, the wound iron core 27A can be easily seated by causing the wound iron core 27A to be seated with the outer peripheral surface of the yoke portion f having no joint b as the base end (base). It becomes possible to apply to. In addition, the adhesive may be sprayed instead of being applied, or may be applied to the inner peripheral surface and both winding end surfaces of the leg portion d.

When the adhesive is applied to the wound end surfaces on both sides of the pair of leg portions d of the wound iron core 27A, the adhesive portion 31A to which the adhesive has been applied is covered with insulating paper. Specifically, for example, with respect to the leg portion d, the insulating paper cut into the length of the leg portion d is preliminarily made into the thickness and width dimensions of the leg portion d as shown in FIG. Insulation adhesive member 3a formed by bending the insulating paper into a U-shape accordingly, after applying the adhesive to the leg portion d, immediately bent into the U-shape on the inner peripheral surface of the leg portion d The abutting portion 3a ₁ of the insulating pasting member 3a is brought into contact, and thereafter, the bent pieces 3a ₂ at both ends of the bridging portion 3a ₁ are adhered to the wound end surfaces of the leg portions d, respectively. Thus, the insulation reinforcement part 32A is formed. In addition, when affixing the insulation sticking member 3a, you may make it apply and apply | coat an adhesive agent to the inner surface of the insulation sticking member 3a in advance.

  As described above, the insulating reinforcing member 3a bent in a U-shape is attached to the pair of leg portions d of the wound core 27A to form the insulating reinforcing portion 32A, and then the wound core 27A is held in a rectangular shape in the window. For this purpose, the second molding dies 28 and 29 and the template 30 incorporated are removed from the window. In this case, even when the molding dies 28 and 29 and the template 30 are removed, the wound iron core 27A has a good rectangular state due to the inner and outer reinforcing frames 16 and 17 and the insulating reinforcing portions 32A provided on the leg portions d. Maintained.

Subsequently, a second insulating sticking member 3b formed by bending an insulating paper in a U-shape is attached to the inner peripheral surface of the yoke portion f that does not have the joint portion b and both winding end surfaces. In this case, as shown in FIG. 1, the second insulating adhesive member 3b includes a bridging portion 3b ₁ that is in contact with the inner peripheral surface of the yoke portion f and bent pieces on both sides of the bridging portion 3b _1. 3b ₂ is formed with a different length. That is, as shown in FIG. 1, the bent piece 3b ₂ is longer than the bridging portion 3b ₁ because the winding end surface at the corner portion of the wound iron core 27A where the yoke portion f and the leg portion d are in contact with each other. It is for covering reliably.

And when attaching the 2nd insulation sticking member 3b to the yoke part f, the case where the insulation sticking member 3a is stuck to the leg part d is based on the said yoke part f, similarly to the case where the insulation sticking member 3a is stuck. After the adhesive is applied to the winding end faces on both sides of the yoke part f, the bridging part 3b ₁ of the second insulating adhesive member 3b is brought into contact with the inner peripheral surface of the yoke part f, and then folded. By attaching the curved portion 3b ₂ to both sides of the winding end surface including the corner portion, an insulation reinforcing portion 32A is formed in the yoke portion f as shown in FIG.

When forming the insulation reinforcing portion 32A in the leg iron portion d and the yoke portion f of the wound iron core 27A, for example, using a rolling device (not shown) for the wound iron core 27A held in a laid down state after the magnetic field annealing. Insulating adhesive members 3a and 3b are adhered to the required parts, or an adhesive is applied to one winding end face (leg portion d, yoke portion f) of the wound core 27A, in this state, the insulating joining member 3a, after attaching a bent piece 3a _2, 3b ₂ one of 3b, inverted by turning device (not shown) wound cores 27A (the attached was bent pieces 3a _2, 3b ₂ In this state, an adhesive is applied to the other (upper) winding end surface of the leg portion d and the yoke portion f, and the bridging portions 3a ₁ and 3b of the insulating sticking members 3a and 3b, and simultaneously abut 3b ₁ leg of section d, the inner peripheral surface of the yoke portion f, the other folding the winding end face By sticking the pieces 3a _2, 3b _2, it may be formed an insulating reinforcing portion 32A shown in FIG.

Although the insulation sticking member 3b stuck on the yoke part f side is formed with different lengths of the bridging part 3b ₁ and the bent piece 3b ₂ , the bent piece 3b ₂ is easily manufactured. At the time, when using what is formed in the same length dimension as the bridging portion 3b ₁ , when using this insulating adhesive member 3b, the winding end surface existing at the boundary between the leg portion d and the yoke portion f Since a triangular gap (a portion where the insulating adhesive member is not attached) will be exposed at the corner of this corner, separate insulating paper that only covers the exposed part is prepared for this triangular gap. By adhering to each other, it is possible to satisfactorily fill the exposure of the iron core portion existing in the gap between the corner portions to the outside.

  Further, without forming the insulating paper in a U-shape, an insulating adhesive member for individually attaching to the winding end surface of the leg portion d and the yoke portion f is provided separately, and the leg portion d and the connection portion are provided on the winding end surface. A plate-like insulating sticking member that covers the iron part f integrally or individually is attached (that is, an insulating paper provided in accordance with the shape of the part to be attached is attached to the attaching location). Thus, the insulation reinforcing portion 32A may be formed. In this case as well, it is a matter of course that an adhesive may be applied and adhered to the wound core and the insulating paper. As described above, in the present invention, only the required part has to be attached without winding the insulating paper around the wound iron core 27A, and therefore, the insulation reinforcing portion 32A uses a minimum of insulating paper. It can be formed quickly and easily. In addition, although the insulation sticking members 3a and 3b demonstrated in the example using the insulating paper, you may make it form using not only this but a press board thicker than an insulating paper, for example.

  As described above, the insulation reinforcing portion 32A having a simple structure in which the countermeasures against the magnetic strip are taken in the state where only the outer peripheral surfaces of the leg iron portion d and the yoke portion f of the wound iron core 27A are exposed to the outside. When formed, the wound iron core 27A releases the adhesive tape (not shown) that temporarily fixes the outer reinforcing frame 16 in order to open the joint b of the yoke portion e, and the free end of the outer reinforcing frame 16 is removed. Open and expand so as to be parallel to the leg portion b.

  As the outer reinforcement frame 16 is opened, the yoke portion e having the joint portion b of the wound core 27A is unbonded. Therefore, the yoke portion e having the joint portion b is bent in an arc shape. As shown in FIG. 3, it spreads out linearly so as to be parallel to the leg portion d. In this case, the wound iron core 27A can be easily expanded by utilizing the remaining elastic force, although the elastic force of the magnetic ribbon 27A is considerably reduced by the magnetic field annealing. As shown in FIG.

  The case where the covering portion 40A is formed on the yoke portion e having the joint portion b expanded in the U shape will be described. As shown in FIG. 14, the covering portion 40A is the same as the case where the second covering portion 40 described in the prior art is formed. That is, in FIG. 3, a metal insertion protective cap 38 shown in FIG. 11 is put on the yoke portion e of the wound core 27A expanded in a U-shape. By fitting the insertion protection cap 38 into the yoke portion e, the outer reinforcing frame 16 can be prevented from being detached from the wound core 27A (since the outer peripheral surface of the wound core 27A is not covered with an insulator). .

  Thereafter, the covering portion 40A is formed on the yoke portion e, and since the specific description thereof has already been described, it will be omitted, but basically, as shown in FIGS. A covering portion 40A is formed by completely covering each yoke portion e by using two covering cloths 40a from the outside of the insertion protection cap 38 that covers the iron portion e. In this case, the base end of the covering cloth 40a is adhered to the end portion of the insulation reinforcing portion 32A located in the yoke portion e with an adhesive tape or the like.

  When the covering portion 40A is formed, the wound iron core 27A is erected on the basis of the yoke portion f that does not have the joint portion b (the direction in which the yoke portion e that has the joint portion b faces upward). In this state, the winding 48 (see FIG. 19) is inserted into one leg portion d using the iron core insertion hole from one of the expanded yoke portions e, and then the other yoke portion e. From e, the other winding 48 is inserted into the other leg portion d connected to the yoke portion e. When the windings 48 are respectively inserted into the leg portions d, the wrapping of the respective covering cloths 40a forming the covering part 40A is dissociated, and the respective covering cloths 40a are wound around the winding end surfaces above the windings 48 as shown in FIG. The yoke part e that has been expanded and expanded is exposed.

  When the yoke portion e is unwrapped by the covering cloth 40a, the winding core 27A is reassembled by sequentially rejoining from the yoke portion e on the inner peripheral surface side again. As shown in FIG. 5, when the reassembly of the wound core 27 </ b> A is completed, the covering cloths 40 a and 40 a expanded to the side of the winding 48 are folded toward the outside of the rejoined yoke portion e, so that FIG. As shown in FIG. 5, the reassembly of the wound core 27A is completed by covering the outside of the yoke part e.

  In the present invention, as described above, the end portion d of the wound iron core 27A made of a magnetic ribbon and the winding end surface of the yoke portion f having no joint portion and the inner peripheral surface thereof are covered with the insulating adhesive members 3a and 3b. (Only the outer peripheral surface of the wound core is not covered) to form the insulation reinforcing portion 32A, and the yoke portion e having the joint portion b is expanded in a U shape by covering the wound core 27A with a covering cloth 40a. After forming the covering portion 40A, the winding core 27A is inserted into the winding 48 via the yoke portion e, and the leg portion d is inserted into the winding 48. The iron part e is rejoined to form the wound iron core 27A. When manufacturing the wound iron core 27A, as a countermeasure against the fragmentation of the magnetic ribbon, the insulating paper is wound around the leg iron part d as in the past. After forming the insulation reinforcing portion 32, the first covering portion 39 and the second covering portion 39a are further covered with an insulating member 39a. After forming the insulation reinforcing portion 32a or assembling the wound core 27A, it is possible to take measures against debris without winding the insulating paper 54 around the outer periphery. As a result, the wound core 27A made of a magnetic ribbon is formed. It is easy and quick to use an insulator with few countermeasures against debris, and the above-mentioned debris countermeasures do not require the insulator to be wound around or inserted into the leg portion d of the wound core 27A. Since the member does not bulge at all, it is possible to smoothly insert and assemble the wound core 27A into the winding 48, and it is also necessary to wind insulating paper around the outer peripheral surface of the wound core 27A after assembling the wound core 27A. Therefore, this kind of wound core 27A can be easily manufactured, and can be easily performed by using the outer peripheral surface of the wound core 27A for grounding. Therefore, a special grounding hand for grounding can be used. Since it is not necessary to provide a countermeasure for debris, this kind of wound core 27A can be manufactured quickly, easily, and economically. Is possible and convenient.

In the wound iron core manufacturing method of this invention, it is explanatory drawing in the case of forming an insulation reinforcement part by the method of this invention in the leg iron part of a wound iron core. It is a top view of the wound iron core which formed the insulation reinforcement part by the method of this invention. It is a top view of the wound iron core expanded in U shape. It is a top view which shows the middle of the reassembly of the wound iron core expanded in U shape. It is a perspective view which shows the state which coat | covers a covering cloth on the yoke part which has a junction part, after assembling a wound iron core to a coil | winding. It is a perspective view which shows the state which assembled the wound iron core manufactured with the manufacturing method of this invention to the coil | winding. It is a top view which shows the state which wound the amorphous magnetic ribbon in a circle | round | yen, and formed the wound iron core body. It is a top view which shows the state which carried out the rectangular shaping | molding of the circular wound core element body. It is a top view of the wound core which shows the middle of forming the insulation reinforcement part by the conventional method in the wound iron core formed in the rectangle. It is a top view of the wound iron core which has the insulation reinforcement part formed with the conventional method. It is a top view which shows the state which open | released the wound iron core which formed the insulation reinforcement part by the conventional method in the U shape. It is a top view which shows the state which forms a 1st coating | coated part in the wound iron core open | released in U shape. It is a top view of the wound iron core which was open | released by the U shape and formed the 1st coating | coated part. It is a perspective view which decomposes | disassembles and shows the state attached to the yoke part of the wound core which was expanded in the case of forming a 2nd coating | coated part. It is a perspective view which shows the state which fixed the covering cloth to the base of the expanded yoke part. It is a top view which shows the state which adhere | attaches the base part of a covering cloth, and a 1st covering part similarly. It is a top view which shows the state wound by the yoke part side which expanded the covering cloth. It is a top view which shows the state which inserts and rejoins the expanded wound iron core in a coil | winding. It is a perspective view of the wound iron core which shows the state which covered the covering cloth on the rejoined yoke part. It is a perspective view which shows the state of the final assembly of the wound iron core manufactured with the conventional manufacturing method.

Explanation of symbols

3a, 3b Insulation pasting member 27, 27A Winding core 32, 32A Insulation covering part 40A Covering part b Joint part d Leg part e, f yoke part

Claims (3)

  A step of forming a wound core body by winding the amorphous magnetic ribbon into a circular shape a predetermined number of times by a one-turn cut method, and forming the wound core body in the above process into a rectangular shape using a forming jig A step of forming, a step of magnetically annealing the rectangular shaped wound core body, and an adhesive on a winding end surface of a yoke portion having no leg and joint portions of a rectangular wound core subjected to magnetic field annealing , A step of sticking an insulating adhesive member to the winding end face to which the adhesive is applied, and a yoke part side having a joint part of the wound core is expanded to make the wound core U-shaped. The step of covering the open yoke part with a covering cloth, and after the winding iron core opened in the U-shape is assembled in the winding, the covering cloth covering the yoke part having the joint is uncovered. And rejoining the yoke part having the joint part, and after rejoining the yoke part, the yoke part is applied to the covering cloth with the covering removed. Method for manufacturing a wound core, characterized in that a step of recoating.   On the winding end surface of the yoke part that does not have a joint part and the leg part of the wound iron core to which the adhesive is applied, an insulating sticking member formed in a U-shape is attached to the leg part and the yoke part. 2. The method of manufacturing a wound core according to claim 1, wherein the winding end surface and the inner peripheral surface of the wound core are covered.   Insulating adhesive members are individually affixed to the leg end of the wound iron core to which the adhesive is applied and the winding end surface of the yoke part that does not have a joint to cover the leg iron part and the yoke part. 2. The method for manufacturing a wound iron core according to claim 1, wherein:

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