JPS6140017A - Manufacture of stationary induction electric apparatus - Google Patents

Abstract

PURPOSE:To obtain a stationary induction electric apparatus with excellent working efficiency by a method wherein a laminated body is formed by cutting a part of the wound body of an amorphous magnetic alloy thin plate, a U-form body is formed by applying a reinforcement plate on the upper and the lower surface of the laminated body, an annealing is performed thereon, and after a winding is incorporated on both legs, standing-up parts are bent toward inside and they are butted together. CONSTITUTION:A part of the wound bodies of a magnetic thin plates is cut and expanded, and they are shifted at the prescribed pitch in the longitudinal direction. Non- magnetic plates 12 and 13 are applied to laminated layers 7A and 7C, they are tightened using plates 14 and 15 and a bolt 16, and they are press-molded in a U-shaped form. The inside distorsion of the above material is removed by performing an annealing, a winding 11 is inserted, the protruded part is bent toward inside by performing a press work on the protruded part, and the end parts 6 are butted together, and the wound core 8 is completed. According to this constitution, only one bending work is performed on laminated layer groups 7A-7C after the winding is inserted, and the deterioration of magnetic characteristics of the amorphous magnetic alloy thin plates can be prevented, these plates have excelent rigidity, and a staionary induction electric apparatus of excellent workability in assembling can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing a stationary induction appliance having an L-turn cut wound core using an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

In recent years, consideration has been given to the use of amorphous magnetic alloy ribbon as the core material for wound cores for transformers and accelerators. Amorphous magnetic alloy ribbon wire, gold handle original purple (Fe, C
(O, Ni, etc.) and metalloid elements (B, C, S, P, etc.) t-
It is manufactured by a melt quenching method, and exhibits excellent magnetic properties with significantly lower iron loss and excitation current than conventional grain-oriented silicon steel sheets, making it suitable as an iron core material.

However, the amorphous magnetic alloy ribbon is produced by ultra-quenching method (10″C, 7°C).
sec) Because the plate is manufactured by
4D at about 50μm, thickness of silicon steel plate 300-350
Extremely thin, about 1/10 compared to μm. Furthermore, since it has the disadvantage of being brittle, it is difficult to cut it one by one when producing a one-turn iron core. For example, when manufacturing a transformer using a wound core of amorphous magnetic alloy ribbon, an uncut type wound core without a joint where the ribbon is continuously wound around a rectangular winding part is often used. It has been adopted. However, the no-cut method not only has poor winding work efficiency because the winding must be wound around the first-turn core, but also steps the cross section into a nearly circular shape in order to improve the core occupation rate in the first-turn cylinder. However, the process for manufacturing the multi-stage wound core is complicated. In addition, winding work is done by rotating the winding cylinder, which requires a cylinder drive gear above or below the cylinder.

There are drawbacks such as the need to increase the height of the iron core window.

Therefore, a method of manufacturing a transformer using an l-turn cut type wound core has been proposed, in which a unit core is inserted every one turn into one winding. This manufacturing method will be explained with reference to FIGS. 6 to 12. As shown in FIG. 6, an amorphous magnetic alloy ribbon 1 is continuously wound in a predetermined length onto a circular winding form 2.
shall be. Then #! As shown in Fig. 7, the winding form 2 is removed from the winding body 3, a part of the winding body 3 is fastened and fixed to the flang plate 4 by the tightening bolt 5, and in this state, the p-winding is done by the cutting plate. Rotary body 3
Then, the 2-ply plate 4 is cut along the cutting section 6. One of the two divided pump plates 4 is removed from the roll 3, and the roll 3 is unfolded as shown in FIG. At this point, a large number of amorphous magnetic alloy ribbons 1 whose lengths increase successively are stacked. Then, as shown in FIG. 9, a plurality of amorphous magnetic alloy ribbons 1 are sequentially shifted by a predetermined length in the length direction. This forms a laminated block 7t in which a large number of amorphous magnetic alloy ribbons l are laminated and both ends are step-shaped.

This laminated block 1 constitutes a plurality of layers in which the core to be formed is divided into a plurality of layers in the radial direction at each predetermined thickness, and each layer of the core has a length corresponding to its circumference and thickness. A plurality of sets of laminated blocks 7A, 7B, and 7C are used. Then, as shown in Fig. 1O, the laminated blocks FA, 7B, and FC are laminated inside and out in the same shape of a rectangular mold 9, and the laminated blocks are laminated by applying pressure by blowing a shiveless mold from all sides. Blocks 7A to 7C# are formed into a rectangular shape. The laminated blocks 7A to 7C formed into a rectangular shape are grouped together and subjected to strain relief annealing in an annealing furnace. After this M~Block 7A~F C11
11-Disassemble, and as shown in FIG. 11, individually assemble each of the laminated blocks 7A to 7C in the winding kii in order from the inner one, cutting them and butting them together to assemble the winding core 8. It is a perspective view which shows the shape m which incorporated the winding core 8 into the 12th expanded winding 1h, and formed it into a transformer t-aia.

However, in the conventional manufacturing method as described above, there is a first-order difference. Amorphous magnetic alloy ribbons have the property of becoming extremely brittle*1 after annealing, and have the disadvantage of easily breaking when external force is applied to them. For this purpose, the laminated block 7A
After forming the 7C group into a rectangular shape and performing strain relief annealing.

When performing the step of incorporating the laminated blocks 7A to 7C into the winding 11, the laminated blocks 7A to 7C are inserted into the winding 11 while stretching a part of the corner, and then part of the corner is inserted again. Since it is necessary to restore the original state, it is necessary to stack the layers! Stress is applied to the amorphous magnetic alloy ribbon JKt that makes up locks 7A to 7C again, and the end face of the amorphous magnetic alloy ribbon l cracks and ruptures due to annealing. Sometimes. Furthermore, the stress sensitivity of the amorphous magnetic ribbon is higher than that of conventional silicon steel strips, and when stress is applied, the magnetic properties deteriorate. For this reason, in the conventional method, when inserting the laminated blocks 7A to 7C, stress is applied again to a part of the corner, and this stress causes deterioration of the magnetic properties of the amorphous magnetic alloy ribbon l. was.

In addition, when forming the laminated blocks 7A to 7C into a U shape by machining, the inner peripheral part of the laminated block 7C and the outer peripheral part of the laminated block 7A crack due to friction with the gold ff19 and the brace m1o. There are deaths that occur.

Furthermore, since the thickness of amorphous magnetic alloy thin ribbon is very thin, when a rectangular L-turn cut core is constructed, the core itself lacks rigidity and cannot maintain its upright state. In terms of workability, it was also very difficult to handle.

[Purpose of the invention]

The present invention was devised to eliminate the above-mentioned drawbacks, and uses an L-turn cut type wound core that does not reduce the magnetic properties of the amorphous magnetic alloy ribbon, has excellent rigidity, and is easy to assemble. The purpose of the present invention is to provide a method for manufacturing a stationary induction electric appliance.

[Summary of the invention] - According to the method of manufacturing a stationary induction device of the present invention, an amorphous magnetic alloy ribbon is wound to form one roll, and a part of this winding is cut and rolled out. A process of forming a laminated block made by laminating amorphous magnetic alloy ribbons, stacking multiple sets of laminated blocks formed in this process, and placing the upper silicate iron part of the single-turn iron core on the upper and lower sides of the laminated block group. A step of forming the reinforcing plates and the laminated block group into a U shape by overlapping each of the reinforcing plates with the removed iron core circumference and identifying the tightening at the central part in the length direction, and a process of forming the U-shaped laminated block group into a U-shape. This method is characterized by comprising an annealing step, a step of assembling the winding into the stacked block group, and a step of bending the upper portions of the stacked block group inward and abutting them. That is, when the winding k is assembled after the laminated block group has been annealed, the chance of stress being applied to the amorphous magnetic alloy ribbon is reduced to prevent damage and deterioration of magnetic properties, and the reinforcing plate is used to prevent This prevents the amorphous magnetic alloy ribbon from being damaged due to friction with the mold, and further improves assembly work efficiency by providing rigidity to the wound core with the reinforcing plate.

[Embodiment of the invention] 5' Hereinafter, an embodiment shown in the drawings will be described.

First, as in the conventional method, as shown in FIGS. 6 to 9, an amorphous magnetic alloy ribbon 1 is continuously wound to form a wound body 3, and a part of the wound body 3 is cut. This is expanded to form a stack of a large number of amorphous magnetic alloy ribbons.

Next, the laminated block 7 is formed by dividing the amorphous magnetic alloy ribbon 1 into a plurality of pieces and shifting them by a predetermined pitch in the length direction. The laminated block 7 formed by this method is 1
A plurality of layers are formed and laminated, each corresponding to a plurality of layers in which the wound core is divided in the radial direction. That is, as shown in Figure 1, 2
Long laminated block IA located on the outer periphery of the wound core
The stacked blocks 7A to IC are stacked vertically such that the stacked blocks 7A to IC are located at the bottom and the short stacked blocks 7C located on the inner circumferential side are located at the top. Laminated again! Reinforcement plate 12 that contacts the outer peripheral surface of the wound core on the lower side of the lock 7A
are superimposed, and the reinforcing plate 13 that contacts the inner peripheral surface of the wound core is superimposed on the upper side of the laminated block 7C, and then laminated! Lock 7A~7
0 group and reinforcing plate 12. Place the center part of the IJI on the flang plate 1.
4.15 and the tightening bolt 16 are integrally tightened and fixed.

In this case, the reinforcing plate IJm13a is made of a non-magnetic material, such as a stainless steel plate. The width of the reinforcing plates 12 and 13 is the same as that of the amorphous magnetic alloy ribbon 1, and the width is slightly narrower.

As will be described later, the length is such that when the laminated blocks 7A to 7C are formed together into a U-shape, the upright part is the height of the upper part of the window part of the winding core, that is, the upper silicate part of the winding core is excluded. Iron core circumference).

A 15m protrusion will be installed.

, then the press song is processed as shown in Figure 2)#
Layer blocks 7A to 70 groups and reinforcing plate, IB, 14f:
Form into a U shape. In this case, the laminated blocks 7A~, 7
0 group and the reinforcing plate 74° 151d, and the positioning pin 15 of the flang plate 15, apply pressure to the central tightening part from above with the combined pre-delta 17, and press the non-tightening parts on both sides with a press lug (not shown). The entire sheet is formed into a T-U shape by standing it upright, pressing it against both sides of the press mold 170, and bending it so as to bend it. Then, to the U-shaped laminated block 7, form the lower silicate iron part of the bottom-shaped wound core of group 70 and the leg part and half of the upper silicate iron part of both small parts of the lower silicate iron core. become.

Note that the lower edges on both sides of the upper clamp plate 15 are arcuate surfaces to facilitate the bending of the laminated block group.

On the other hand, the above-mentioned press curve is made by processing the reinforcing plate 12.13.
It can also be bent into a U-shape together with the stacked blocks 7A to 7C. Reinforcement plate 72. JJ is U-shaped laminated block 7A
It is located along the bottom (lower silica part of the wound core) and both upright parts (legs of the wound core) on the outer peripheral surface and inner peripheral surface of the ~70th group. For this reason, even if the clamping plates 14, 15 and the bolts 16 of each of the laminated blocks 7A to 7C are removed, they are held by the reinforcing plates JJ, JJ so as to be independent.

Next, a U-shaped laminated block IA->7Ci
FP is strain-removed and annealed in an annealing furnace to produce an amorphous magnetic alloy ribbon.
remove internal distortion.

Next, clamp plates 14,
15 and the tightening gel 16t are removed, and then, as shown in FIG. position. In this case, reinforcing plate 14.
15 serves as a guide when fitting the winding kll, and the amorphous magnetic alloy ribbon 1 of the laminated blocks 7A to 7C groups serves as a guide when the winding kll is fitted.
It also has the role of a protective plate to prevent damage due to contact with 1.

Next, as shown in FIG. 4, the winding nozzles at both upright portions of the stacked blocks 78 to 70 are connected.

The upper part that protrudes upward from 11, that is, the part that forms the upper silicate part of the wound core, is bent inward at right angles by press bending process.
6 are butted against each other and joined to form a wound core 8.

FIG. 5 shows the butt portion of this cut surface 6. In this way, the laminated blocks 7A to 7C only need to be bent and processed once after the winding wire 71°1'1 is assembled, so that the stacked blocks 7A to 7C can be bent and processed only once after the winding wire 71゜1'1 is assembled. , compared to the case where the laminated blocks 7A to 7Cg are folded, separated and then folded again □, the laminated blocks 7A to 2C are made of amorphous magnetic alloy ribbon l. There is a very small chance that stress will be applied to the amorphous magnetic alloy ribbon 1' of the laminated blocks 7A to 7C group.
Although it has become brittle due to strain relief annealing, it is unlikely that excessive stress will be applied to it, so it will not break due to stress.
It is possible to suppress deterioration of magnetic properties due to the action of stress.

In addition, in press bending of the laminated blocks 7A to 7C groups, the press die contacts the reinforcing plates 12 and 13, but does not contact the laminated blocks 78 to 7 (JP). Laminated block 2 for protection
The amorphous magnetic alloy ribbon 1 of groups 8 to 7C will not be damaged due to friction with the press die. □Furthermore, the laminated blocks 2A to 70 groups are reinforced with reinforcing plates 12 and 13 after the press bends are processed.

Because it is held in an upright U-shape.

Winding wire 1'1, Zl is attached to the upright part of the stacked block 7A-70 group.
t-Easy to assemble.

Although the above embodiment describes the case of manufacturing a transformer, the present invention can be similarly applied to the case of manufacturing other stationary conductor devices such as the beam axle type. = ・□ [Invention [Effects] □ ``As explained above, the method for manufacturing a static conductor according to the present invention improves assembly workability without degrading the magnetic properties of the amorphous magnetic alloy ribbon.'' You can also do it.

[Brief explanation of drawings]

Figures 1 to 5 show a working example of the manufacturing method of the present invention, in which Figure 1 is a side view showing a group of laminated blocks, and Figure 2 is a press working of a group of laminated blocks. A front view showing the state, a perspective view showing the state in which the winding is assembled into the third winding core, a perspective view showing the state in which the upper silicon part of the m41iii3h winding core is formed □ and the transformation gain is assembled. A cross-sectional view showing an enlarged cross-sectional view of the abutting portion of the cut surfaces of the upper silicate part, No.
6 to 12 show the conventional manufacturing method, and FIG. 6 is an explanatory diagram showing the manufacturing process of the wound body. Fig. 7 is an explanatory diagram showing the state in which the rolled body is fixed and cut, Fig. 8 is an explanatory diagram showing the state in which the cut rolled body is unfolded, and Fig. 9 (-) is a perspective view showing the laminated block. Figure 9 (
btu, an explanatory view showing an enlarged end of the laminated block, Figure 1: A plan view showing the laminated block tube formed into a rectangular shape, Figure 11: A perspective view showing the state where the laminated block is assembled into the winding wire, Figure 12 The figure is a perspective view showing a state in which the wound core is assembled into the winding wire. l... Amorphous magnetic alloy ribbon, 2... Winding form, 3...
Winding body, 4...flang plate, 5...tightening? Ruto, 6
... Cutting part, 7.7A to 7C ... Laminated block, 8
..., wound core, 9... mold, io... press mold, 11... winding wire, 12.12... reinforcing plate, 14.
15...flang board! 6...Tightening Ile), 17.
...Press type. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] An amorphous magnetic alloy ribbon is wound to form a wound body, and a part of this wound body is cut and expanded to form a laminated block formed by laminating a plurality of amorphous magnetic alloy ribbons. step, stacking multiple sets of laminated blocks formed in this step, and reinforcing plates having a core circumference excluding one of the silicate iron parts of the wound core to be formed on the uppermost and lowermost surfaces of the laminated block group. a step of forming the laminated block group together with the reinforcing plate into a U shape by arranging the respective reinforcing plates and fixing the central part in the longitudinal direction of the laminated block group with the reinforcing plate; a step of annealing, a step of assembling a winding into each upright portion corresponding to both legs of the wound core of the U-shaped laminated block group, and a step of incorporating a winding into each upright portion of the U-shaped laminated block group; 1. A method for manufacturing a stationary induction appliance, comprising the steps of bending it inward at right angles and butting it together.