JPS59178714A - Manufacture of laminated iron core - Google Patents

Abstract

PURPOSE:To easily obtain a laminated iron core using amorphous magnetic alloy thin plate by forming a frame like a picture frame by bending at a right angle the areas corresponding to the corners of iron core of a belt shaped amorphous magnetic alloy thin plate and continuously laminating such frames. CONSTITUTION:The iron core blocks 11-14 are formed by continuously bending the four corners of amorphous magnetic alloy thin plate 15 with a press. Next, distortion is eliminated by executing annealing process to the blocks 11-14. Since the iron core as a whole can be divided into the blocks 11-14 in the laminating direction and can be annealed, distribution of temperature of iron core as a whole can be uniformed during the annealing process. The blocks 11- 14 are impregnated with resin such as epoxy resin and are integrated. Moreover, the blocks 11-14 are combined and tightened by tightening bolts. Thereby, it is no longer necessary to cut the hard and brittle thin plates 15 with a cutter and the iron core blocks can be formed easily and continuously during the bending process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a laminated iron core using amorphous magnetic alloy thin plates.

[Technical background of the invention and its problems]

Conventionally, a laminated core used in a transformer of, for example, 1000 KVA has been composed of a core leg portion and a yoke portion formed by laminating silicon steel plates. The silicon steel plate constituting this +1 layer core has a thickness of 03 to 0.35 mm, but it is easy to cut with a cutter, and
Since the steel plates themselves have rigidity, the shape does not collapse even when stacked and assembled, making it easy to assemble.

Recently, in response to the demand for energy saving, amorphous magnetic alloy thin plates have been developed, and the use of these as materials for laminated iron cores is being considered. Amorphous magnetic alloy thin plates are alloyed with all 1-aryl elements such as iron, cobalt, and nickel, and semimetallic elements such as boron, carbon, silicon, and phosphorous.
It is a thin plate having a thickness of 100μ and a width of 50 to 100M, which is manufactured by rapidly cooling this alloy body at an ultra-high speed. Amorphous magnetic alloy thin plates have significantly smaller core loss and excitation current than silicon steel plates, and have excellent magnetic properties, so they are suitable as core materials.

However, since the amorphous magnetic alloy thin plate is thin, hard, and brittle, it is difficult to manufacture a layered core having a conventional core structure using this thin sheet metal. That is, since the amorphous magnetic alloy thin plate is hard and brittle, it is very easily damaged when cut with a cutter. Moreover, it is very troublesome to cut it without damaging it, and it is necessary to use a cutter made of an expensive material. In addition, since the thin plates are very thin and lack rigidity, the shape of the stacked iron cores tends to collapse during stacking and assembly, and very troublesome work is required to prevent them from collapsing. Furthermore, since there is a limit to the width of the thin plate, there is also the problem that it is difficult to obtain a core shape and cross-sectional shape of a desired size.

[Purpose of the invention]

The object of the present invention has been made in view of the above circumstances, and is to provide a method for manufacturing a @layer iron core that can be easily manufactured using an amorphous magnetic alloy thin plate.

[Summary of the invention]

The method for manufacturing a laminated core of the present invention involves bending a strip-shaped amorphous magnetic alloy thin plate at right angles at locations corresponding to the corners of the core to form a frame-like body, and then folding this frame-like body into a It is characterized by being formed continuously so as to

[Embodiments of the invention]

An embodiment of a J-core obtained by the manufacturing method of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a front view showing the laminated core, and FIGS. 2 and 3 are cross-sectional views of the core legs and yoke. This laminated core is made of strip-shaped amorphous magnetic alloy thin plate I as shown in Figure 4.
5 and four sets of iron core blocks 11 of different sizes.
．． 12°13.14 are combined in the core thickness direction or core width direction. These iron core blocks 11 to 14 are constructed by laminating a plurality of frame-shaped bodies continuously formed from band-shaped amorphous magnetic alloy thin plates 15. That is, as shown in FIG. 5, a strip-shaped amorphous magnetic alloy thin plate 5 is bent at an angle of 90 degrees at each of the four corners of the iron core to form a frame-shaped body, and then as shown in FIG. It is made by stacking frame-like bodies by continuously forming them one on top of the other. The corners of the frame-like body are non-!
Since the 111 quality magnetic alloy thin plate 15 is bent in a right angle direction, its outer edge is inclined at an angle of 45°. Further, the height and width of the core blocks 11 to 14 and the width of the amorphous magnetic alloy thin plate 15 differ depending on the position of the core. For example, the height of the core block is the largest in the core block 12, and decreases in the order of core blocks 14, 11, and 13, and the width of the core block is the largest in the core block 12, followed by core block 14, core block 11, and so on. .13. The plate width dimensions of the amorphous magnetic alloy thin plate 15 are iron core block II, and those of 12 are iron core blocks 13 and 14.
It's thicker than the one. Furthermore, these iron core blocks 11~
14 are each fixed integrally by impregnating and solidifying with resin. Further, if necessary, a glass tape or the like may be wound around each core block 11 to 14 to fix it. The iron core blocks 11 to 14 having such a configuration are arranged and assembled at predetermined positions in the animal center. That is, the animal core block 12 is arranged on the outer periphery of the central part of the core, the animal core blocks 1-1 are arranged side by side along the width direction of the core on the inner periphery thereof, and the animal core blocks 1-1 are arranged on both sides of the core block 120. The core blocks 14 are arranged along the thickness direction, and the core blocks I are arranged along the core thickness direction on both sides of the core block 1 (that is, on the inner peripheral side of the core block 14).
3 are arranged respectively.

The iron core blocks 11 to 14 are assembled around the central axis of the iron core. Tightening bolts (not shown) are inserted into holes 16 having a triangular cross section formed along the core thickness direction between the four corners of the frame-shaped bodies in each of the combined iron core blocks 11 to 14, and the tightening bolts The assembled iron core blocks 1 to 14 are integrally tightened and fixed.

In addition, 17 in the figure is a winding wound around the core leg portion of the core. Since the winding 17I'i is wound around the core leg, the section W1 of the core leg is made to have a configuration as close to a circle as possible. For this reason, the core blocks 13.14 are arranged on both sides of the core blocks 11.12, and the cross section of the core legs is shaped to be nearly circular.

When manufacturing the laminated core configured as described above, first, each of the core blocks 11 to 14 is manufactured by continuously bending the amorphous magnetic alloy thin plate 15 at the four corners using a press machine. In this case, if necessary, the corners of the frame-shaped body in the iron core block are pressed to form the amorphous magnetic alloy thin plate 1.
It is also possible to break the bent portion of 5. In this case, the amorphous magnetic alloy thin plate 15 is thin, hard, and brittle, and is easily broken. Next, the iron core blocks 11 to 14 are annealed to remove strain. An iron core made of laminated amorphous magnetic alloy thin plates cannot obtain good magnetic properties unless the temperature distribution is made uniform during annealing. The iron core block 11~z4tfjtt
Since it can be annealed by dividing it in one direction, the warm distribution of the entire core can be made uniform during annealing. Next, the iron core block 11
~ No. 4 is impregnated with resin such as epoxy resin to integrate. Furthermore, the iron core blocks 11 to 14f are combined and tightened and fixed using a tightening port. In this case, the holes 16 between the corners of each core block 11 to 140 serve as a guide for assembly.

If the laminated core is manufactured in this way, there is no need to cut the hard and brittle amorphous magnetic alloy thin plate 15 with a cutter, so the troublesome effort of cutting the thin plate 15 without damaging it can be eliminated, and the thin plate 15 can be cut by cutting. 15 can be avoided, and there is no need to use an expensive cutter.

Since the iron core blocks 11 to 14 can be formed continuously while bending the amorphous magnetic alloy thin plate 15, they can be manufactured easily and in a short time. Since the iron core blocks 11 to 14 are laminated with a plurality of frame-shaped bodies continuously formed from amorphous magnetic alloy thin plates 15, their rigidity is excellent. Increases rigidity. In addition, by arbitrarily dividing and configuring the core blocks and combining them, it is possible to easily obtain a spear-shaped core having a desired core shape and cross-sectional shape.

In addition, in the above-mentioned embodiment, a case was described in which the core blocks were combined in both the core width direction and the core thickness direction.
The invention is not limited to this, and either one of the core blocks may be combined, and the laminated core can also be constructed by using only one set of core blocks.

Although the above-mentioned embodiments are intended for single-phase laminated cores, they are not limited to this, and can also be applied to three-phase outer iron type laminated cores shown in FIG. 7, three-phase inner iron type laminated iron cores shown in FIG. 8, etc. can also be applied.

In addition, as shown in FIG. 9, in the core block, strip-shaped amorphous magnetic alloy thin plates 18 are provided at locations other than the corners of the frame-shaped body.
By inserting this, it is possible to equalize the laminated thickness between the corners of the frame-like body and other parts.

〔Effect of the invention〕

As explained above, the method for manufacturing the laminated core of the present invention involves stacking a plurality of frame-shaped bodies formed continuously from strip-shaped amorphous magnetic alloy thin plates, so that the amorphous magnetic alloy A laminated iron core can be easily manufactured without cutting thin plates with a cutting machine.

[Brief explanation of drawings]

1 to 6 each show an embodiment of a laminated core obtained by the method of the present invention, FIG. 1 is a front view showing the laminated core, and FIG. 2 is taken along the line X-X in FIG. 1. Cross section, 3rd
The figure is a cross-sectional view taken along the Y-Y line in Figure 1, and Figure 4 (a).
(b), (c), and (d) are perspective views showing the iron core block, respectively. Fig. 5 (a) and (b) are explanatory views showing the formation state of the frame-like body, respectively. Fig. 6 is the laminated state of the frame-like body. A side view showing the
7 and 8 are front views showing the product 1 core in other different embodiments, respectively, and FIG. 9 fa) (b) is a front view of the core block showing other different embodiments, FIG.゛2゛ 1-14... Iron core block, I5... Amorphous magnetic alloy thin plate, 17... Winding wire. Figure 1 Y (a) Figure 2 Figure 3 1 Figure 4 (b) Figure 5 Figure 6 ] Figure 8 5 Figure 9

Claims (1)

[Claims] A laminated iron core is produced by bending a strip-shaped amorphous magnetic alloy thin plate at right angles at each corner of the core to form a frame-like body, and continuously forming thin wire-like bodies in a laminated manner. Production method.