JPS6091611A - Manufacture of wound core - Google Patents

Abstract

PURPOSE:To simplify the assembling process and to easily obtain the one-turn cut type wound core consisting of an amorphous magnetic alloy thin strip by a method wherein the wound body on which an amorphous magnetic alloy thin strip is cut into a plurality of laminated block pieces, and each one of these laminated block pieces is made uniform, adhered and assembled. CONSTITUTION:A wound body 2 is formed by winding a long-sized amorphous magnetic alloy thin strop 1 in the prescribed number of turns necessary for a wound core. This wound body 2 is cut along the axial direction by performing a laser processing and the like. On end 1a of the cut-off thin strip 1 is made even with the linear position at right angle with the longitudinal direction, and it is expanded on a plane surface taking advantage of the elastic restoring force of the thin strip 1. Then the prescribed number of sheets of the thin strap 1, 10-20 sheets for example, are laminated and formed into a block, and it is divided into a plurality of laminated blocks of 3-1-3-n. A welding work is performed in the state wherein one end 1a of laminated blocks are made even at the right angle, or they are adhered in one body by soaking into heat-resisting synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a wound core using an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

Etern-cut wound cores are used as cores for transformers and the like. This wound core is made by winding a magnetic metal strip (conventionally a silicon steel strip) cut at each turn with a constant number of turns so that the cut positions differ in the circumferential direction. Since this wound core has a cut Hfr section in the magnetic metal strip whose position is different for each turn, it has a lower magnetic resistance than a C-cut wound core and has excellent magnetic properties, so it is widely used. There is.

However, although the one-turn cut type wound core has excellent magnetic properties, it requires a lot of effort to manufacture because of the above-mentioned configuration. During manufacturing, each turn of a long magnetic metal strip (silicon steel strip) is cut at a predetermined turn length.
A method is adopted in which the cut magnetic metal strips are sequentially wound concentrically from the inner circumferential side of the iron core and assembled.

Recently, however, iron cores using amorphous magnetic alloy ribbons, which have low iron loss and excellent magnetic properties, are being developed as iron core materials in place of conventional silicon steel strips. Therefore, it has been considered to use an amorphous magnetic alloy ribbon also in a single cut-shaped wound core. However, since the amorphous magnetic alloy ribbon is manufactured using an ultra-quenching method, its thickness is 30 to 50 mm.
At 0μ, it is extremely thin compared to silicon steel strips, and its rigidity is /J.
S-sai. For this reason, when manufacturing a sill turn-cut old iron core from amorphous magnetic alloy ribbon, if the scar is formed using the same method as when using conventional silicon steel strip, the ribbon will be very thin. It takes a lot of work to cut a large number of long thin strips for each turn, and then wind the cut strips concentrically to assemble them. It was said that the work was very difficult because it easily fell apart.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and provides a method for easily manufacturing a one-turn cut type wound core using an amorphous magnetic alloy ribbon.

The method for manufacturing a wound core of the present invention involves winding an amorphous magnetic alloy ribbon, cutting a portion of the ribbon into a laminated state, and then rolling the amorphous magnetic alloy ribbon into a plurality of layers. The amorphous magnetic alloy ribbon is divided into 7i1 blocks, one end of each of these laminated blocks is aligned and fixed, and the other end is set as a free end.
Next, each laminated block is rolled into a ring with both ends abutted, and concentrically assembled while sequentially shifting the butt positions to produce a wound core.

[Embodiments of the invention]

An embodiment of the present invention illustrated in the drawings will be described below.

First, as shown in Fig. 1, a long amorphous magnetic alloy ribbon 1
is wound into a circular shape, for example, with a predetermined number of turns required for the wound core to be manufactured, to form the wound body 2. In this case, the circumference of each turn of the wound body 2 is equal to the circumference of each turn of the wound core. 〇Next, the wound body 2, that is, a part of the wound amorphous magnetic alloy ribbon 1, is processed in a straight line along the axial direction from the outer circumferential side to the inner circumferential side by laser machining, electric discharge machining, etc. disconnect.

In this case, the amorphous magnetic alloy ribbon 1 is cut at each turn of the wound body 2 at its respective turn length.

Then, as shown in FIG. 2, the cut amorphous magnetic alloy ribbon J is aligned with one end 1a in a straight line perpendicular to the longitudinal direction of the ribbon, using the elastic restoring force of the ribbon 1. Develop it on a flat surface. As a result, a large number of amorphous magnetic alloy ribbons 1 cut according to the number of turns of the wound body 2 are stacked. Each of the cut amorphous magnetic alloy ribbons 1 has a different length depending on the circumference of each turn of the wound body 2, so one end 1a of each amorphous magnetic alloy ribbon 1 is aligned. and,
The other end 1b is sequentially shifted in position according to the difference in the length, and is in an inclined state. Therefore, the amorphous magnetic alloy ribbon J as a whole has an isosceles trapezoid shape with the -legs forming right angles.

Next, as shown in FIG. 3, a predetermined number of sheets, for example 10 to 20
One block is a stack of cut amorphous magnetic alloy ribbons 1, and the entire amorphous magnetic alloy ribbon J is made up of a plurality of laminated blocks 3-1, 3-2. ...Divide into 3-H. [No], the entire amorphous magnetic alloy ribbon 1 is wrapped around the wound body 2.
It is divided into a plurality of laminated blocks from the inner circumferential side to the outer circumferential side. And each laminated block, 9-1.3-2,...
- In 3-n, one end of each Ja-J.

,? a-2, ... 3a-fi, spot welding is performed by laser welding, ultrasonic welding, or electric resistance welding with one end Ja of each laminated amorphous magnetic alloy 1 aligned at right angles, Alternatively, it can be fixed integrally by impregnating it with heat-resistant synthetic resin. The other end of each laminated block 1, 9
b-1,,? b-2,...? b - n is the other end Jb depending on the difference in length of the amorphous magnetic alloy ribbon l, respectively.
are arranged in a sacro-oblique pattern and left in a free state without applying any fixing means as described above. For this reason, each laminated block 3-J,
J-2, . . . , v −H becomes an unequal trapezoid.

Next, for example, a rectangular winding core (not shown) is prepared, and the entire winding core of the laminated block 3-1 located at the innermost circumferential side of the winding core (the most circumferential side of the winding body 2) is prepared. Wrap it around the periphery in a ring shape, and abut both ends Ja-7 and 3b-1. In this case, the laminated block 3-no is wound along the core with the fixed end 3a-1 as a reference. Next, the laminated block 3 wound around the winding core
- Similarly, the opaque layer block 3-2 is wound in an annular shape around J, and both ends 3a-2 and 3b-2 are abutted against each other.

In this case, both 7J of the laminated block 3-2, ? a-
2, 3b-2 butt positions are at both ends Ja-1, ? of the stacked block 3-1. It is moved to a position shifted by a predetermined distance in the circumferential direction with respect to the butt position b-1. In this way, each laminated block is concentrically wound one after another in an annular manner toward the outer periphery, and the positions of both ends are shifted in the circumferential direction and assembled.

Finally, the laminated block 3-n on the outermost circumferential side of the wound core
is wound to form a plurality of laminated blocks 3-1. shown in FIG.
．． 9-2. ...Assemble a rectangular wound core 4 made by concentrically winding 3-n.

Note that the laminated block 3-1.3-2. ...? -H
Other HA? Since b-no, 3b-2, -3b-n are in a free state, the whole is aligned in a straight line when it is wound (see Fig. 5). If the abutment position of both ends of each layer block shifts in the circumferential direction at a certain stage, return it to the initial position and shift it in the circumferential direction again (see Figure 4).

After that, the wound iron core 4 is wrapped around the wrapped flattened blocks 3-7, 3-
2. ..., the whole of v-H is fixed by a benefit band.

Furthermore, the wound core 4 is annealed in a magnetic field, and then the wound core 4 is annealed in a magnetic field.
The coil 5 is wound around. To wind the coil 5, the annealed wound core 4 is once disassembled and each laminated block 3-1, 3-2. ．．
? This is done by incorporating -n into the j-order coil 5.

Note that a long amorphous magnetic alloy ribbon 1 is wound to form a wound body 2.
In this case, as shown in Fig. 6, a laminated block, ? −
1.3-2. ..., q nVc By inserting a thin piece 6 of metal or the like at each location of a predetermined number of turns to be divided, it is easy to divide the laminated blocks 9-1, 3-2, . . . 3-n. Also, due to the presence of the thin piece 6, the circumference of the turn located on the outside becomes longer, so that the wound body 2
The shortness of the turn circumference due to cutting can be corrected.

Although FIG. 6 shows a wound body 2 in which the amorphous magnetic alloy ribbon 1 is wound into a rectangular shape, it may be circular. Further, the cross-sectional shape of the wound core 4 may be square or pseudo-circular.

In this way, the entirety of the large number of amorphous diamonds (magnetic association thinnings) constituting each turn of the wound core can be cut at once with the circumference of each turn, which simplifies the cutting process. A large number of amorphous magnetic alloy ribbons obtained by cutting the wound body are divided into a plurality of ut k blocks and fixed together, and these laminated blocks are wound concentrically to assemble the wound core.
It is possible to prevent the amorphous magnetic alloy ribbon from coming apart during the core assembly process, thereby greatly simplifying the core assembly process.

〔Effect of the invention〕

As explained above, in the present invention, the wound body of the amorphous magnetic alloy ribbon is cut at one time, and it is divided into a plurality of laminated block pieces and assembled by aligning one end of each piece and fixing them, thereby reducing the number of assembly steps. 1 consisting of amorphous magnetic alloy ribbons with a large 175-total structure.
A turn-cut shaped wound core can be easily manufactured.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the manufacturing method of the present invention. Figure 1 is a front view of the wound body, and Figure 2 shows the rolled body of the amorphous magnetic alloy ribbon. Fig. 3 is a front view showing a state in which the rolled body is divided into a plurality of laminated blocks;
Fig. 4 is a sectional view showing a wound core type transformer, Fig. 5 is an enlarged view of the main part showing part A in Fig. 4, and Fig. 6 is a perspective view showing another example of the wound body. be. 1...Amorphous magnetic alloy WI band, 2...Wound body, 3-
j, 3-2. ...3-H...Laminated block, 4...
・Wound core, 5...coil. Applicant's agent Patent attorney Takehiko Suzue 1st WJ Figure 2 Figure 3 Figure 4 Figure 5m 6H

Claims (1)

[Claims] An amorphous magnetic alloy ribbon is wound to form a wound body, a part of this wound body is cut and the amorphous magnetic alloy TI4''W is developed in a laminated state, and then these amorphous magnetic alloys are The amorphous magnetic alloy ribbon is divided into a plurality of laminated blocks each laminated with a plurality of layers, one end of each of these laminated blocks is aligned and fixed, and the other end is set as a free end. A method for manufacturing a wound core, characterized in that each of the laminated blocks is wound in an annular shape with both end portions abutted, and the wound core is formed by concentrically assembling the laminated blocks while shifting the position of the abutting portions in the circumferential direction.