JPH11135349A - Amorphous iron-core transformer and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the rigidity of a leg iron part and prevent the leakage of metallic pieces by attaching an adhering member, formed of insulation member to the leg iron part of winding iron core formed of an amorphous iron core. SOLUTION: In leg iron parts b and b of a winding iron core 11 formed of amorphous magnetic alloy thin band, an adhesive is applied plurally to one of laminated end surface with a specified interval in distance so as to form an adhering part, and a U-shaped adhering member 18 is adhered to the adhering part to cover the upper half of the leg iron parts b and b, and then an adhesive is applied plurally to a U-shaped adhering member 19 so as to form an adhesive layer, and the adhering member 19 is adhered to the other of the laminated end surface of the leg iron parts b and b, so as to cover the lower half of the leg iron parts b and b. Further, the free ends on the inner and outer circumferential surfaces of the leg iron parts b and b of the adhering parts 18 and 19 are fixed and the rigidity of the leg iron parts b and b in the winding iron core 11 is enhanced by the upper and lower paired adhering members 18 and 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amorphous core transformer using a one-turn cut core made of an amorphous magnetic alloy ribbon and a method of manufacturing the same. An object of the present invention is to provide an amorphous core transformer in which rigidity of a leg portion of an iron core is enhanced and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, for example, a transformer core using an amorphous magnetic alloy ribbon (hereinafter, referred to as an amorphous core) as a core material for a distribution transformer has been developed and put into practical use. The amorphous core used as the transformer core is manufactured by ultra-quenching a melt of a magnetic alloy, and has excellent magnetic properties with very small iron loss.
When a wound iron core is manufactured using this amorphous iron core, for example, a so-called one-turn cut type winding provided with a joint such as a butt joint or a lap joint in one of the pair of yoke parts is used. Many iron cores are manufactured today.

The one-turn cut type wound core is, for example, a plurality of unit cores (20 pieces) obtained by cutting a strip-shaped amorphous core at a predetermined length for each turn.
To 30 pieces), a unit core element body is provided, and the unit core element bodies are further laminated in a plurality of layers to form a unit core block (hereinafter simply referred to as a laminated block). The laminated block is wound in a circle, butted or overlapped while shifting both ends of the unit core element sequentially in a stepwise manner, and the laminated block is further wound and laminated in the same manner as described above in a predetermined number. To form a one-turn-cut circularly wound core having a layer thickness of.

[0004] The one-turn cut wound core laminated as described above is formed into a rectangular shape with its joint such as butt positioned on one side of the yoke, and then subjected to magnetic field annealing. The joint portion of the yoke portion is opened for each laminated block of the wound core, and the U-shaped laminated block having the opened joint portion is sequentially inserted into the core insertion hole of the winding, followed by the winding. By sequentially rejoining the joining portions of the laminated blocks inserted into each of the laminated blocks, the linkage of the magnetic circuit and the conductive circuit is completed, and the winding core is assembled.

[0005]

However, when manufacturing a one-turn cut wound core as described above, there are the following problems. (1) Since the amorphous iron core has low rigidity and is considerably weakened by annealing, when the laminated blocks are sequentially inserted into the windings to perform the core assembly, the laminated blocks are not inserted into the windings when the laminated blocks are inserted into the windings. When colliding with other laminated blocks, the corners and laminated end faces of the amorphous core are easily broken or peeled off, resulting in metal fragments of the amorphous core.
For example, there is a problem that the debris strays due to the convection of the insulating oil during the operation of the transformer and penetrates between the layers of the winding to deteriorate the insulation of the winding.

(2) Further, since the amorphous iron core has poor rigidity, when the laminated core is assembled by dividing the laminated block into individual pieces, each laminated block loses its shape at the time of rectangular molding, and each of the laminated blocks is broken. Since the core was assembled by opening it in a U shape using the joint of the yoke part,
Deformation of its own weight is likely to occur, which may cause internal distortion or the like in the iron core itself, which may adversely affect its magnetic properties. As a result, it is necessary to take great care in assembling the wound core, and to assemble this kind of wound core smoothly and
There was also a problem that it could not be performed efficiently.

(3) Further, since the amorphous iron core is manufactured to be extremely thin and considerably weakened by annealing, when each laminated block is sequentially incorporated into a winding, it is extremely poor in autonomy. In many cases, you will end up in a cramped state. For this reason, each laminated block is self-standing using a special jig or the like until the next laminated block is inserted each time it is inserted into the winding, so that the assembling efficiency of the wound core using the amorphous core is Was very bad, and was a major factor in hindering productivity improvement of this kind of core.

SUMMARY OF THE INVENTION In view of the above problems, the present invention enhances the rigidity of an amorphous iron core at the time of assembling the iron core, so that the work of assembling the wound iron core into the winding can be performed quickly and smoothly without deteriorating the magnetic characteristics. Accordingly, it is an object of the present invention to provide an amorphous core transformer and a method for manufacturing the same, which can improve the productivity of a wound core transformer made of an amorphous core.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a rectangular wound iron core having an amorphous magnetic alloy ribbon wound and cut at least one place and provided with a joint such as a butt. In an amorphous core transformer comprising a winding inserted into a leg portion of an iron core, an adhesive is applied to one of the laminated end surfaces of the leg portion of the wound core at a plurality of locations while maintaining a predetermined interval. Then, an adhesive portion is provided, and a U-shaped attaching member is attached to the adhesive portion to cover the upper half of the iron leg portion, and the other laminated end surface of the iron leg portion is formed in a U shape. A plurality of adhesives are applied to the adhered members, and the adhesive member provided with an adhesive layer is adhered to cover the lower half of the iron leg portion, and the inner and outer peripheral surfaces of the iron leg portions of the respective adhesive members At the free ends respectively, and the leg iron portion of the wound core is covered with a pair of upper and lower attaching members so as to form a wound core. It is characterized in.

Further, in the present invention, the pair of upper and lower affixing members which are covered with the leg portions of the wound iron core are formed by a metal shaping frame for setting the stacked thickness of the leg portions formed in a U-shaped cross section. It is characterized in that the shaping frame is removed and adhered to the leg iron portion of the wound core so that the shaping frame is removed when the wound core is assembled.

[0011] The present invention further provides a rectangular wound iron core provided with a joining portion such as a butt by cutting an amorphous magnetic alloy ribbon and cutting at least one portion thereof, and a leg iron of the wound iron core. A step of covering the iron leg portion of the wound iron core with a pair of upper and lower attaching members, and holding the pair of attaching members between the iron leg portions for a certain period of time. Causing the attaching member to adhere and hold to the leg iron portion,
A step of opening the yoke portion having the joining portion and expanding the wound core into a U-shape after releasing the holding of the attaching member, and inserting the U-shaped expanded wound core into the winding, and Rejoining the expanded yoke portion.

According to the present invention, a pair of upper and lower affixing members are attached to the leg iron portion of the wound iron core, so that the rigidity of the iron leg portion is strengthened and the amorphous core weakened by annealing is subjected to an impact force generated at the time of assembling the wound iron core. Good control of chipping, which facilitates the work of assembling the winding core to the winding.
It was possible to perform well. Further, since the attaching member is divided into a pair of upper and lower parts, the attaching operation can be easily performed, and the fastening means is formed by an adhesive appropriately applied to one of the leg irons and one of the attaching members. Since the sticking member was stuck to the iron leg portion so as to sandwich it, the pair of sticking members stuck was held for a certain period of time while maintaining the stacked thickness of the leg iron portion by the shaping frame. The wound iron core has a simple structure to increase the rigidity of the leg iron.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes an amorphous magnetic alloy ribbon (hereinafter, simply referred to as an amorphous iron core) cut into a predetermined length, which is cut and wound to form a wound iron core. Shows the device,
The cutting and winding device 1 is a state in which a plurality of (five in this embodiment) drums 3 around which an amorphous core 2 is wound and a plurality of amorphous cores 2 unwound from the respective drums 3 are superposed. Feed roller 5 for feeding to cutting device 4
A cutting device 4 for cutting the amorphous core 2 fed from the feed roller 5, and a belt 7 for winding the amorphous core 2 cut by the cutting device 4 onto a winding shaft 6.
And an iron core winding machine 8 wound sequentially in a circular shape through the core.

Next, a case in which the cutting / winding device 1 winds a one-turn cut type wound core will be described. First, the amorphous iron cores 2 rewound from the plurality of drums 3 are superimposed and stacked, respectively, and are sequentially fed to a cutting device 4 by a feed roller 5 in a predetermined length dimension to be cut. Subsequently, the core blanks 9 cut at the predetermined length are laminated in a plurality of layers in a stepwise manner on, for example, an alignment table 9a to form a core blank 10 and the core blank 10 is removed. Winding shaft 6 of core winding machine 8
Next, a circular core (not shown) is sequentially wound in a circular shape via a winding belt 7.

When the annular core is wound, it is removed from the winding shaft 6 and formed into a rectangular shape by a forming jig (not shown), and is subjected to magnetic field annealing to form a rectangular shape as shown in FIG. The wound core 11 is formed. In FIG. 2, reference numeral 13 denotes an inner reinforcing frame disposed inside the wound iron core 11, and reference numeral 14 denotes an outer reinforcing frame similarly disposed outside the wound iron core 11, each of which is formed by a silicon steel strip. Reference numeral 12 shown in FIG. 1 is a controller for automatically controlling the drive / stop of the cutting device 4, the feed roller 5, the iron core winding machine 8, and the like.

As shown in FIG. 2, the wound iron core 11 formed in a rectangular shape and subjected to magnetic field annealing can be satisfactorily formed by the presence of the inner and outer reinforcing frames 13 and 14 even when a forming jig (not shown) is removed. State is maintained.

[0017] Next yoke portion h of the winding core 11, and insert the pair of molding dies 15,15a as shown in FIG. 3 between h _1, followed by the molding die 15,15a groove a, A plate-shaped template 15b is press-fitted between a and the rectangular state of the wound core 11 is maintained, and in this state, one of the laminated end faces of the pair of leg portions b, b of the wound core 11 (see FIG. 3). For example, an adhesive made of a cold-setting epoxy resin or the like is applied at regular intervals to form an adhesive portion 16 as shown in FIG. Insulate the paper with the legs b,
b.

That is, as shown in FIG. 2, after the magnetic field annealing is completed, the wound iron core 11 is closed as shown in FIG.
The rectangular state of the wound iron core 11 is maintained using the mold plates 5 and 15a and the template 15b. Thereafter, it is suspended by lifting means (an electric hoist, an electric lift or the like) not shown, and the wound iron core 11 is moved to the position shown in FIG.
As shown by, it is mounted on a pair of footrests 17,17. Thereafter, even if the molding dies 15, 15a and the mold plate 15b are removed, the wound iron core 11 is retained by the inner and outer reinforcing frames 13, 14.
The rectangular state is favorably maintained without losing shape.

When the wound iron core 11 is mounted on the footrests 17, 17, as shown in FIG. 4, one of the laminated end faces (FIG.
On the upper side of the
A plurality of adhesive portions 16 are formed by coating at a constant interval. These bonding portions 16 include, for example, JIS C231
7. A polyester film processed for electric use (composed of a polyethylene terephthalate film and an insulating paper bonded to provide a buffering effect on the film, hereinafter simply referred to as an insulating processed paper) specified in 7 above, b. Cover the upper half.

That is, as shown in FIG. 5, the insulated paper is bent in a U-shape in the width dimension on the lamination end face side of the leg iron parts b, b to provide a bridging part c. The bent portion d connected to the entangled portion c is bent at a half length of the width of the peripheral surface of the leg iron portions b, b, so that the U-shaped attaching members 18, 1 are bent.
8 is formed. And these pasting members 18, 18
By bonding the bridging portion of the insulating paper (back surface) portion to the bonding portion 16 provided on the lamination end surface side of the wound iron core 11 with the film side as the surface, the upper side surfaces of the leg iron portions b, b (shown in FIG. As shown in FIG. 6, the upper half portion is covered with the attaching members 18 and 18 so as to be wrapped.

Next, the case where the lower half of the leg portions b of the wound iron core 11 is covered will be described. In this case as well, the point of using the pasting member bent in a U-shape is the same as above,
U-shaped sticking member 1 that covers the lower half of leg irons b, b
The 9 and 19 as shown in Figure 5, the bridge c ₁ of insulating paper portion serving as pre inner surface (back surface), applying an adhesive consisting of a room temperature curing epoxy resin or the like with a predetermined distance Thereby, a plurality of adhesive portions 19a are formed.

As shown in FIG. 5, when the attaching members 19, 19 are attached, the upper attaching members 18, 18 are attached to the laminated end faces located below the leg portions b, b of the wound iron core 11. and by attaching a bridge portion c ₁ abuts similarly coated as wrap leg of section b, the lower of b side (the lower half) in the adhering member 19, 19. As a result, as shown in FIG. 6, the leg iron parts b, b are stacked at the bridging parts c, c ₁ and the bent parts d, d _{1 of the} pair of upper and lower sticking members 18, 19, and the laminated end faces and the inner and inner parts.
The outer peripheral surface can be completely covered.

When the attachment of the attaching members 18 and 19 is completed,
Subsequently, the thickness dimension of the leg portions b, b is maintained. (Since the amorphous iron core is formed much thinner than the silicon steel strip, if the fusion of the laminated end face is loosened after annealing, the wound core 11
Since the whole tends to swell, it is necessary to stabilize the stacking dimension of the lamination end face and to keep it constant.)
In order to ensure the adhesiveness between the core 19 and the wound core 11, FIG.
As shown in the figure, a shaping frame 2 having a U-shaped section
By sandwiching 0 and 21, the thickness of the wound core 11 is kept uniform.

As shown in FIG. 8, the shaping frames 20 and 21 for maintaining uniformity of the stacking dimensions are, for example, formed by bending a metal steel plate into a U-shape according to the stacking dimensions of the wound core 11. And
A pair of bent pieces e described above bent to form a curved portion e ₀ the end of the bent piece e outwardly curved (inclined) to the one of e _1.
Then, the shaping frames 20, 21 are connected to the leg irons b,
b, the bridge portion f of the shaping frames 20, 21
A cushion material 22 made of rubber, sponge, or the like having an appropriate thickness is attached to the inside in advance.

Then, the U-shaped shaping frames 20 and 21 are respectively attached to the pair of bent pieces e and e from outside of the attaching members 18 and 19 made of insulating processed paper attached to the iron legs b and b.
₁ is brought into contact with the inner and outer peripheral surfaces of the leg portions b, b. In this state, when the bridging portion f of the shaping frames 20, 21 is pushed toward the laminated end surface side of the leg portions b, b, the shaping is performed. frame 20 and 21, bent piece e by using the curved portion e ₀ provided on the bending piece e side, the e ₁ leg of part b, in diverging state by b, as shown in FIG. 7 It is clamped between the leg iron parts b, b.

As described above, the shaping frames 20 and 21 are attached to the legs b and b of the wound iron core 11 as shown in FIGS.
On the stack end face, from below, a pair of bent pieces e, by Komu Hasame utilizing a curved portion e ₀ which is formed on one of e _1, shaping frame 20 and 21 enable the elasticity of itself Use
Further, the film surfaces on the surfaces of the attaching members 18 and 19 can be slid and easily clamped to the leg irons b.

Adhering members 18 and 19 adhered to the leg portions b and b of the wound iron core 11 by sandwiching the shaping frames 20 and 21.
, The bridge c, c ₁ is pressed by the elastic force of the cushion member 22 leg of section b, and the laminated end faces of b, the adhesive portion 16 is bonded to the flat through the adhesive portion 19a. Further, since the shaping frames 20 and 21 are formed in a U-shape in vertical section by a metal steel plate, when the shaping frames 20 and 21 are sandwiched between the leg irons b, b, an elastic force acts thereon, so that the leg irons b, b are good. And the thickness of the leg portions b, b can be kept constant.

After the attaching members 18 and 19 and the shaping frames 20 and 21 have been attached to the leg portions b and b of the wound iron core 11 as described above, the bent portions d and d
_As shown in FIG. 10, adhesive tapes are applied between the ₁ (free ends) and the bent portions d, d ₁ (free ends) and the iron legs b, b on the inner and outer peripheral surfaces of the iron legs b, b. 23 (the bent portions d, d by an adhesive instead of the adhesive tape 23).
₁ may be temporarily fixed to the legs b, b). As a result, the attachment members 18 and 19 are attached to the leg iron portions b and b of the wound iron core 11 with the bridge portions c and c ₁ and the bent portions d and d ₁ adhered. As shown in FIG. 10, b and b are held in a state of being covered with the attaching members 18 and 19. Thereafter, when the adhesive portion 16 and the adhesive portion 19a are hardened, the shaping frames 20, 21 are removed from the leg portions b, b.

Therefore, in the present invention, as shown in FIG. 10, the iron legs b, b of the wound iron core 11 are attached to the affixing members 18, 19 made of insulated paper so that the amorphous iron core becomes brittle by annealing. 2 can be satisfactorily prevented from being broken or peeled off.
1 itself can be prevented from being deformed, and its rigidity can be enhanced to increase its independence. This is because a relatively strong insulating member combining a film and insulating paper is used for the attaching members 18 and 19, so that the use of the film and the use of a plurality of kraft papers are used. It may be.

After the affixing members 18 and 19 are attached to the wound core 11, the wound core 11 is mounted on, for example, a roller conveyor 24 via a sliding plate 24a by a lifting means or the like (not shown). The yoke portion h where the joint portion g of the wound core 11 is located is released outward by using the joint portion g by releasing the fixing of the outer reinforcing frame 14. That is, the wound iron core 11 is moved from the rectangular state to FIG.
As shown by 1, the plane is expanded so that the plane shape becomes U-shaped. At the time of opening the wound iron core 11, since the leg iron parts b, b are sufficiently maintained in rigidity by the sticking members 18, 19, respectively, when the yoke part h having the joint g is opened. In this case, the wound iron core 11 is not deformed under its own weight or deformed at all, and can be smoothly and satisfactorily opened in a U-shape.

As described above, the yoke portion h is replaced with the joint portion g.
11, an insertion protective cap 25 made of brass or the like formed by bending the tip into a tapered shape is abutted from the point of the yoke part h to the leg iron parts b, b as shown in FIG. . In the insertion protective cap 25, the leading end of the open yoke portion h of the wound core 11 abuts against the entrance of the core insertion hole 28 (see FIG. Or tilting inward or outward to make the insertion work into the winding 27 difficult.

On the other hand, the winding 2 into which the winding core 11 is inserted
As shown in FIG. 11, 7 is mounted and fixed in parallel on a pair of winding fixing devices 29 provided in the middle of the roller conveyor 24. In this winding fixing device 29, the windings 27, 27
In order to prevent rocking when the assembly 1 is assembled, a pair of windings 27 mounted on the mounting table 30 are clamped and fixed by a locking plate 31 (only one is shown in the figure). As shown in FIG. 11, the locking plate 31 is mounted and fixed on the mounting table 30 while holding the windings 27, 27 therebetween. Further, the mounting table 30 is configured to be moved up and down by a certain dimension with reference to the top of the roller portion 32 of the roller conveyor 24 by a lifting means (not shown). Place the winding 27 on the mounting table 3
After being fixed to zero, the mounting table 30 is operated to adjust the top of the roller portion 32 and the lower surface of the core insertion hole 28 of the winding 27 to be at the same height.

A pair of windings 27, 27 are connected to a winding fixing device 29.
Then, the core 11 is opened in a U-shape.
Means roller conveyor 2 in advance by lifting means (not shown) or the like.
4 on a slide plate 24a, and
The open yoke part h side is located on the winding 27 side as shown in FIG. At the time of insertion into the windings 27, 27, the guide cover 33 is put on the outside of the insertion protective cap 25 of the opened yoke part h, and in this state, the sliding core 24 is slid on the roller conveyor 24 by the sliding plate 24a. The winding 2
7, and the leg irons b, b of the wound core 11 are inserted into the core insertion holes 28, 28 of the windings 27, 27 in one operation (see FIG. 12). The leg members b, b of the wound iron core 11 are provided with affixing members 18, each having a film with low frictional resistance on the surface.
Since 19 is attached, the wound core 11 can be smoothly inserted into the winding 27 without receiving a large frictional resistance.

At this time, since the leg portions b, b of the wound iron core 11 are strengthened by the sticking members 18, 19, the wound iron core 11 is deformed by its own weight or the amorphous iron core 2 is damaged. Quick and easy winding 2
7, 27 can be inserted. The core 11
The yoke portion h ₁ side having no joint portion g of, as shown in FIG. 10, since the rigidity strengthening using special reinforcements such as not being grave, the bending force of the yoke portion h ₁ By effectively utilizing, when assembling the winding core 11 into the winding 27, the yoke portions h, h with the joint g side opened and the core insertion holes 28,
28, and can be quickly and reliably inserted into the winding 27 without damaging the wound core 11.

When the insertion of the leg portions b, b of the wound core 11 into the windings 27, 27 is completed, the yoke portion of the wound core 11 protruding from the windings 27, 27 as shown in FIG. h,
The guide cover 33 (removed in FIG. 12) and the insertion protective cap 25 which are put on the h are removed as shown in FIG. 13 by pulling out from the insertion direction of the wound core 11 or the opposite side thereof. Thereafter, as shown in FIG. 14, the joint portion g is sequentially bent from the innermost layer side of the opened yoke portion h of the wound core 11 to the state before opening (inside), and the joined portion g is rejoined as shown in FIG. 15. Then, the reassembly of the wound iron core 11 is completed by fixing the portion where the outer reinforcing frame 14 is overlapped by spot welding.

As described above, when the wound iron core 11 is opened in a U-shape and inserted into the windings 27, 27, or when the opened yoke portion h is rejoined after the insertion, the wound iron core 11 is removed. Although the constituting amorphous core 2 is very brittle by annealing, the leg iron portions b, b are covered with the attaching members 18, 19, so that when the wound iron core 11 is inserted into the winding 27, the amorphous core 2 2 is hard to generate metal fragments due to the impact at the time of insertion, and combined with the fact that the leg portions b, b themselves are strengthened rigidly, as a result, the metal fragments remain in the iron core insertion hole 28 of the wound iron core 11. I will not do it.
Therefore, it is possible to reliably prevent the problem that the metal fragments leak into the insulating oil from the iron core insertion hole 28 of the winding 27 during the operation of the transformer and deteriorate the insulation of the winding 27.

[0037] As described above, After completing the reassembly of the winding core 11, as shown in FIGS. 14 and 15, yoke portion h of the axial end face and the wound core 11 of the winding 27, between the h ₁ The windings 27, 27 and the winding core 11 are fixed by inserting the insulating spacer 34. Thereafter, the yoke portion h of the wound core 11, a h _1, respectively clamp member (not shown), and fastened through the winding holding between the end faces of the winding 27, the state In core 1
1 is housed and fixed in a case (not shown), and the case is filled with insulating oil in a fixed amount to complete the manufacture of the amorphous iron core transformer.

[0038]

As described above, according to the present invention, a pair of upper and lower sticking members are attached to the legs of the wound iron core made of an amorphous iron core to enhance the rigidity of the legs and prevent leakage of metal fragments. As a result, the winding core can be assembled into the winding in a single operation, and the assembly work can be performed quickly and easily, and the leakage of metal fragments can be suppressed. Can be satisfactorily avoided.

When attaching the sticking members, the pair of sticking members are attached to the iron leg portions by an adhesive applied to one of the laminated end surfaces of the leg portions and one of the pair of sticking members. The sticking member was attached to the iron leg portion for a certain period of time with a clip-shaped shaping frame, so that the sticking member was efficiently attached with a small amount of adhesive. Can be easily and economically strengthened.

In addition, since the attaching member is attached only to the leg portion of the wound core, when the wound core is expanded in a U-shape and inserted into the winding at the time of assembling the wound core, the spread core is expanded. Alignment of the yoke and the core insertion hole of the winding can be easily performed by effectively utilizing the bending force of the other yoke, and moreover, the friction between the surface of the sticking member of the leg and the iron. Coupled with the use of the insulating member having low resistance, the work of assembling the winding core into the winding can be performed quickly, easily, and efficiently, which is convenient.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an apparatus for cutting and winding an amorphous magnetic alloy ribbon.

FIG. 2 is a plan view showing a state in which a wound core is formed into a rectangular shape by performing an annealing process in the present invention.

FIG. 3 is a plan view showing a state before the attaching member is attached to the leg iron part.

FIG. 4 is a perspective view showing a state in which a wound core is mounted on a footrest and before an attaching member is attached.

FIG. 5 is a perspective view showing the wound core and the attaching member separately.

FIG. 6 is a perspective view showing a state in which an attaching member is attached to a wound core.

FIG. 7 is a perspective view of the wound iron core showing a state in which the attaching member is sandwiched between shaping frames.

FIG. 8 is a perspective view of a shaping frame.

FIG. 9 is a cross-sectional view showing a leg iron portion of the wound core in a longitudinal section.

FIG. 10 is a perspective view of a wound core to which an attaching member is attached.

FIG. 11 is a perspective view showing a state before a winding core is inserted into a winding.

FIG. 12 is a perspective view showing a state where a winding core is incorporated in a winding;

FIG. 13 is a plan view showing a state where a winding core is inserted into a winding.

FIG. 14 is a plan view showing a state where the wound core inserted into the winding is rejoined.

FIG. 15 is a perspective view showing a state where assembly of the wound core is completed.

[Explanation of symbols]

2 Amorphous iron core 11 Rolled iron core 16 Adhesive part 18, 19 Adhering member 20, 21 Shaping frame b, b Leg iron part g Joint part h, h ₁ Yoke part

Claims (3)

[Claims] An amorphous magnetic alloy ribbon is wound, and at least one portion is cut and fitted into a rectangular core having a joint such as a butt, and a leg iron portion of the core. In the amorphous iron core transformer comprising the windings, the iron leg portion of the winding core is provided with an adhesive by applying an adhesive to one of the laminated end surfaces at a predetermined interval at a predetermined interval. A U-shaped attaching member is attached to the adhesive portion to cover the upper half of the iron leg portion, and the other laminated end surface of the iron leg portion is provided with a plurality of adhesives on the U-shaped attaching member. The lower part of the leg iron part is covered by applying the adhesive member provided with an adhesive layer by applying a location,
A free end located on the outer peripheral surface of each of the leg portions of each of the attaching members is fastened, and the leg portions of the core are covered with a pair of upper and lower attaching members to form a core. Amorphous iron core transformer. 2. A pair of upper and lower affixing members which are covered with the leg portions of the wound core are formed by a metal shaping frame for setting the thickness of the leg portions formed in a U-shaped cross section. 2. A method according to claim 1, wherein said leg iron portion is bonded and held.
Amorphous iron core transformer as described. 3. A rectangular wound iron core wound with an amorphous magnetic alloy ribbon and cut at least one place and provided with a joint such as a butt, and inserted into a leg iron portion of the wound iron core. And a step of covering the iron leg portion of the wound iron core with a pair of upper and lower attaching members, and attaching the pair of attaching members to the iron leg portion for a predetermined time. A step of bonding and holding the core to the leg iron part, a step of releasing the sandwiching of the attaching member, and expanding the wound core in a U-shape by opening the yoke portion having the joint, and the step of expanding the wound iron core into the U-shape. Inserting the opened wound core into the windings and rejoining the expanded yoke portion.