JPH0611013B2 - Winding method of winding iron core - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a winding method of a one-turn cut type winding core using an amorphous magnetic ribbon.

[Technical background of the invention]

Conventionally, directional silicon steel strips have been used as the core material of wound core transformers, but recently, an amorphous magnetic thin strip completely different from this core material has been applied as the core material of wound core transformers. It has started to be done. This amorphous magnetic ribbon has excellent magnetic characteristics with significantly smaller iron loss and exciting current than conventional silicon steel strips, and is very suitable as a core material for wound cores.

[Problems of background technology]

However, the amorphous magnetic ribbon cannot be manufactured with a thickness equal to that of a conventional silicon steel strip because of its manufacturing method, and its thickness is about 1/10 of that of a silicon steel strip. Extremely thin,
Very brittle. For this reason, when a wound iron core is wound using an amorphous magnetic ribbon, generally, a non-cut type wound iron core in which an amorphous magnetic ribbon is continuously wound and does not have a so-called joint is often adopted. . However, since the amorphous magnetic ribbon is a very thin foil, when winding the silicon steel strip, even if the wound iron core of the amorphous magnetic strip is wound while applying the same tension, It was difficult to wind smoothly because it was often broken on the way. Therefore, when winding the amorphous magnetic ribbon, it is necessary to wind at a relatively slow winding speed while suppressing the tension at the time of winding so that the ribbon itself is not broken. However, since the amorphous magnetic ribbon is a very thin foil as described above, it has a drawback that it takes a considerable time to wind it to a predetermined winding thickness.

Furthermore, in the uncut winding core, the winding must be wound directly, so the workability of the winding is poor, and
In order to improve the occupancy rate of the iron core in the winding, it is necessary to make the iron core cross section into a stepped structure close to a circular shape, which complicates the process of manufacturing a wound iron core having a multi-stage structure. In addition, for winding work, two split bobbins were fitted on the iron core leg and the electric wire was wound by rotating this with a removable ring gear and drive gear, so ring gear and drive gear are specially required for winding. In addition, there is a drawback that the height of the iron core window must be increased.

For this reason, a so-called 1-turn cut type winding core has been proposed in which a unit iron core for each turn is inserted into a winding to assemble the iron core instead of the uncut type. When winding a wound iron core of this system, a conventional amorphous silicon ribbon is cut in the same manner as the conventional silicon steel strip is cut into pieces one by one in an equal dimension and the layers are wound and laminated in the order of dimension. For example, since the inner circumference of the iron core is used as a reference and the length is sequentially lengthened by a dimension corresponding to 2πt, the pieces are cut one by one and wound and laminated, so that workability is very poor. Therefore, by stacking a plurality of amorphous magnetic ribbons (for example, 3 to 5 sheets), cutting them into a set with a predetermined equal difference size for each turn, and sequentially winding them on a reel. , I try to reduce the winding time. However, the winding time can be shortened by overlapping and winding a plurality of amorphous magnetic ribbons of thin foil, but the amorphous magnetic ribbon is very thin, and the surface has a smoothness. Since it is highly slippery, when a plurality of amorphous ribbons are superposed and cut, some of them are misaligned, or the plurality of amorphous magnetic ribbons of the same length are wound. When performing, as in the case of cutting, there is a possibility that a part of the magnetic ribbon will be wound in a shifted state. As a result, undesired voids are formed in the joints of the one-turn cut type winding core, the joints overlap each other, and the end layers of the winding layers of the winding core become uneven, resulting in increased iron loss. Or
There are various problems in winding the winding iron core of the transformer using the amorphous magnetic ribbon, such as the iron core pieces in the uneven portion vibrating and becoming a noise source during the operation of the transformer. .

[Object of the Invention]

The present invention eliminates the above-mentioned drawbacks and has excellent magnetic properties. However, by using an amorphous magnetic ribbon, which is a cumbersome material to be used as an iron core material, a one-turn cut type wound iron core is damaged. Provided is a winding method of a wound iron core, which can be manufactured rationally and economically without any effort.

[Outline of Invention]

The present invention, when winding a one-turn cut type winding core,
In advance, a plurality of amorphous magnetic ribbons are superposed and bonded and fixed by an adhesive, and then the plurality of bonded and fixed amorphous magnetic ribbons are set to a reference circumference of 2πt every one turn.
It is characterized in that the core is obtained by sequentially lengthening and cutting it by a length corresponding to the above, and winding the cut core plate to obtain a wound core.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic configuration diagram showing an embodiment of a winding device for carrying out the winding iron core winding method of the present invention. In FIG. 1, reference numeral 1 denotes a drum on which an amorphous magnetic ribbon (hereinafter simply referred to as a ribbon 2) is wound as a hoop material. In this embodiment, the ribbon 2 is an example in which five layers are stacked. For the sake of explanation, five drums 1 are used, and a braking device (not shown) is attached to each drum 1. A winding roller 3 rewinds the ribbon 2 from each drum 1, and a feed roller for feeding the unwound ribbons 2 in five layers to a reel driving device, which is driven by an electric motor 3a. A ribbon joining device 5 for joining and fixing five ribbons 2 to form one iron core ribbon 4 is installed between each drum 1 and the feed roller 3. This device 5, as shown in FIG. 1, guides the thin strips 2 unwound from the drum 1 so as not to swing in the width direction thereof. ), And a coating roller 8 that applies, for example, a cyanoacrylate-based instant adhesive (hereinafter simply referred to as instant adhesive 7) that cures at room temperature to the lower surface of the ribbon 2. (Because this roller 8 does not apply the bottom ribbon 2) , 4 in this example),
The thin strips 2 coated with the instant adhesive 7 are polymer-bonded to each other and 1
It is constituted by a pair of superposing rollers 9 which form the iron core strip 4. Further, as shown in FIG. 3, the roller 8 for applying the instant adhesive 7 to the thin strip 2 is provided with a scraping device which is attached to the upper end surface of the adhesive container 10 when a large amount of the instant adhesive 7 is attached. It is provided so that the instant adhesive 7 is scraped off by the plate 11 to prevent the instant adhesive 7 from adhering to the thin strip 2 more than necessary amount, and the thin strips 2 are bonded to each other with the minimum necessary instant adhesive 7. . The iron core strip 4 formed by joining and fixing a plurality of the thin strips 2 is formed by the feed roller 3 as shown in FIG.
The loop L is loosened once and sent to the reel driving device side. The length of the loop L is set, for example, by a light emitter and a light receiver (not shown), and the end of the loop L reaches a predetermined set position. Then, means for generating a signal from the light receiver is provided so that the light from the light emitter is blocked, whereby the motor of the feed roller 3 is driven by a signal sent from the control device S so that the length of the loop L is always less than or equal to the set value. Drive control of 3a. A feeding device 12 feeds the iron core strip 4 slackened in a loop shape to a winding position of a winding frame drive device 13 described later in a fixed amount, which is driven by a pressing roller 12b vertically moved by a cylinder 12a and an electric motor 12c. The cutting cutter 14 is composed of a roller 12d, and 14 is a cutting cutter for cutting the iron core strip 4 at a required length. The cutting cutter 14, the cylinder 12a, and the electric motor 12c are driven and controlled by a command signal from the controller S. To be done. Then, the reel driving device 13 winds the iron core blank 4a, which is cut into a predetermined size, one after another, a motor 17 that rotates the reel 15 through the conductive belt 16, and the reel 15 A plurality of rollers 18 arranged in a predetermined position so as to surround the roller 18 and an endless shape which is rotatably mounted on the rollers 18 and rotates by being driven by the rotation of the core plate 4a wound on the winding frame 15. The winding belt 19 and the cylinder 20 that constantly applies a constant tension to the winding belt 19 are arranged around the winding frame 15 while pressing the core ribbon 4 fed from the feeding roller 12d from the outside. Get involved.

In the figure, 21 is a guide roller, and 22 is a U-shaped guide, for example, which prevents the iron core strip 4 fed by the feeding device 12 toward the reel driving device 13 from rolling.

Next, the winding procedure of the ribbon 2 according to the method of the present invention will be described.

In this embodiment, the thin strips 2 are wound in five layers so that each thin strip 2 unwound from the drum 1 by the feed roller 3 is prevented from swinging in the width direction by the guide metal fittings 6. Then, the instant adhesive 7 is applied to the lower surface of each ribbon 2 by the application roller 8 to which the instant adhesive 7 is attached. It should be noted that only the lowermost thin ribbon 2 is not applied because it is not related to bonding. After applying the instant adhesive 7, each thin ribbon 2 is individually guided to the superimposing roller 9 side, and is sandwiched between the pair of superimposing rollers 9 one after another so as to be superposed and adhered to each other to form five superposed thin strips 2. To form one iron core strip 4. At this time, although the instant adhesive agent 7 begins to cure when it is applied to the ribbon 2, it does not so much while being exposed to air,
When the ribbons 2 come into contact with each other and the contact with the air is cut off, the ribbons 2 are cured almost instantaneously and the ribbons 2 of 5 layers are integrally bonded. Since each coating roller 8 is provided by the scraping plate 11 so that only the minimum necessary amount of the instantaneous adhesive 7 is attached, the thin adhesive strip 7 is applied with the minimum amount of the instantaneous adhesive 7 as a result. When the two are bonded to each other, the instantaneous adhesive 7 does not exude from the layers of the core ribbon 4 and does not adversely affect the core ribbon 4 itself and the winding thereof. The iron core strip 4 is fed to the feeding device 12 side by the feed roller 3 and the guide roller 21 provided with a loop L having a certain size. The iron core strip 4 thus fed has a pressing roller 12b and a feeding roller 1
The feeding roller 12d, which is held between 2d and electrically driven,
Thus, the fixed amount is fed to the reel driving device 13 side. On this occasion,
The cutting cutter 14 has not started cutting yet and is open. The iron core strip 4 sent to the reel driving device 13 has its tip attached to the reel 15 and the winding belt 19 to form the reel 15.
When the winding is started, the electric motor 12c for driving the feeding roller 12d is stopped by the command signal from the control device S,
Further, the cylinder 12a once releases the pressing of the pressing roller 12b. That is, when the core ribbon 4 is wound by the winding belt 19 of the reel driving device 13, the feeding device 12 is once released, and the core ribbon 4 is wound by the winding force of the winding belt 19. It is drawn in toward the side of 13 and is wound around the winding frame 15 while being pressed by the winding belt 19. When the length corresponding to one winding is reached during the winding of the core strip 4, the cutting cutter 14 is instructed by the command signal from the control device S.
Operates to cut the iron core strip 4. Immediately after the cutting of the iron core strip 4, the electric motor 12c and the cylinder 12a start to be driven by the command signal from the control device S, and the pressing roller 12
b, the iron core strip 4 to be wound next by the feeding roller 12d
Is fed to the winding position of the reel driving device 13. Then, when the winding belt 19 is started to wind on the outside of the iron core element plate 4a of the previous layer wound on the winding frame 15 and the length corresponding to one winding is reached, Similarly to the above, the cutting cutter 14 operates by the command signal from the control device S to perform the cutting. This cutting time is based on, for example, the circumference of the innermost core core plate 4a wound on the bobbin 15 and thereafter is 2π.
A cutting command is given from the control device S to the cutting cutter 14 for each predetermined size that changes sequentially by a size corresponding to t, and cutting is performed. The above operation is repeated a predetermined number of times, and the operation shown in FIG.
A wound iron core 23 of a turn cut type is wound.

The winding iron core 23 wound as described above is removed from the winding frame 15 of the winding frame driving device 13, rectangular shaped, and then subjected to DC magnetic field annealing to form a one-turn-cut system made of an amorphous magnetic ribbon. It manufactures a wound iron core.

Although the present invention has been described with reference to an example in which the amorphous magnetic ribbons 2 are stacked in five layers, the present invention is not limited to this,
The wound iron core may be wound by overlapping and adhering in the range of about 0 sheets, and the application roller 8 does not apply the instantaneous adhesive 7 to the entire surface of the amorphous magnetic ribbon 2 and the width dimension. The present invention can be realized even if the amount of the instant adhesive 7 used is saved by coating the amorphous magnetic ribbon 2 by applying only about half of the above.

Further, in the present invention, instead of applying the instant adhesive agent 7 to the ribbon 2 by the application roller 8, the instant adhesive agent 7 may be applied to the ribbon 2 by spraying.

〔The invention's effect〕

The present invention has the following effects because the amorphous magnetic ribbon is wound by the method described above to form the wound iron core.

According to the present invention, a plurality of amorphous magnetic ribbons are polymer-bonded to each other by using an instant adhesive to form an iron core strip, and the iron core strip is fed to a winding frame driving device and wound. Each time one winding is performed on the frame, the reference circumferential length is sequentially changed by a dimension corresponding to 2πt and the winding is performed while cutting, so that the one-turn cut type winding core is formed. When winding the wound iron core, the iron core strip is formed by superimposing a plurality of amorphous magnetic thin strips into a single sheet with an instant adhesive, so that the thickness is 1/10 of that of the silicon steel strip. Since the winding and cutting of the amorphous magnetic ribbon, which is only possible, can be performed with the same rigidity as that of the silicon steel strip, the winding work of the wound iron core can be performed smoothly without the iron core strip being displaced.・ You can do well.

In addition, when winding the winding iron core, as described above,
Since the core of the core is made to have a strong rigidity, there is no possibility that the joint of the one-turn cut type winding core will be displaced or that the end face of the winding layer will be uneven. The winding work of the wound iron core using can be performed quickly, reliably, and smoothly without deteriorating the magnetic characteristics.

As mentioned above, the amorphous magnetic ribbon is composed of a plurality of sheets.
It is polymerized and adhered to a piece of iron core strip, and is fed to the reel driving device side by a feeding device to be wound around the reel. Every time the fed iron core strip is wound, In addition, since the wound iron core is wound by sequentially cutting the wound iron core at a position corresponding to the length, the winding of the one-turn cut type wound iron core is not particularly troublesome, and the usual silicon steel is wound. Since it can be performed in the same manner as the winding of the strip, the amorphous magnetic thin strip can be wound tightly without being relaxed,
The winding of the transformer iron core using the amorphous magnetic ribbon is performed smoothly and satisfactorily and economically by the one-turn cut method without damaging the characteristics of the amorphous magnetic ribbon. It is convenient because it can be turned.

Furthermore, in the present invention, since a plurality of amorphous magnetic ribbons are polymerized with an instant adhesive to form one iron core ribbon, the core ribbon is used. Using an instant adhesive, there is no need to heat the iron core steel strip to solidify the adhesive, and a plurality of amorphous magnetic ribbons forming the iron core ribbon at room temperature are used as one iron core ribbon. Since it can be used as, as a result of completely eliminating the means for solidifying the adhesive, not only the winding process of the winding iron core can be shortened, but also the winding equipment itself can be reduced, so the adoption of the winding method of the present invention Thus, the winding work and the winding equipment can be reduced.

In the present invention, a plurality of amorphous magnetic ribbons are combined into one by using an instant adhesive to form a core ribbon.
At the time of winding the iron core strip, the iron core strip is wound in a one-turn cut method while being cut into lengths corresponding to one winding to obtain a wound core. When the amorphous magnetic ribbon is used for the transformer, the laminated end faces become uneven and iron loss increases, and the core pieces in the uneven parts vibrate during the operation of the transformer to generate noise. Various problems caused by winding the wound iron core can be reliably solved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a wound iron core manufacturing apparatus for carrying out the winding method of the present invention, FIG. 2 is a plan view of a wound iron core wound according to the present invention, and FIG. 3 is an amorphous magnetic ribbon. It is an explanatory view for explaining a use state of an application roller that applies an instant adhesive to the. 2 ... Amorphous magnetic ribbon, 4 ... Iron core ribbon 7 ... Instant adhesive, 8 ... Coating roller 12 ... Feeding device, 13 ... Reel driving device 14 ... Cutting cutter, 15 ... Reel

Claims (1)

[Claims] 1. An amorphous magnetic ribbon is cut into a required length each time it is wound to wind a wound iron core. The amorphous magnetic ribbon is wound from each drum. Along with returning, a step of individually applying an instant adhesive to these amorphous magnetic ribbons, and a plurality of amorphous magnetic ribbons coated with the instant adhesive are polymer-bonded by a polymerization roller to form a strip-shaped iron core element. The step of forming a band and the band-shaped iron core element band are sandwiched by a feeding device composed of a pressing roller and a feeding roller which is driven / stopped by a drive / stop command from a control device to form a reel drive device. A step of feeding a fixed length and a reel while the core strip fed to the reel driving device by the feeding device is unpinched by the feeding device and pressed from the outside by a winding belt. In addition to the winding of the iron core strip, Each time a length corresponding to the number of windings is fed, the step of winding the winding core while cutting the core strip by a cutting command from the control device to the cutting cutter is provided. How to wind a winding iron core.