JPS62222615A - Manufacture of stationary induction electric apparatus - Google Patents

Abstract

PURPOSE:To obtain a one-turn cut type wound core consisting of a thin strip of amorphous magnetic alloy by abutting both end planes of laminar blocks after applying a smooth surface forming material to one of the end planes of each laminar block of square shape and opening the laminar blocks to incorporate a winding. CONSTITUTION:An amorphous magnetic alloy thin strip 1 is wound to form a wound body and thin wound body is cut and developed to form a plurality of groups of laminar blocks 7a-7c composed of a number of thin strips 1 laminated and having both end planes forming inclined planes. The blocks 7a-7c are laminated and are shaped into a square. A smooth surface forming material 21 is applied to one of the end plane of the shaped blocks 7a-7c. The blocks 7a-7c provided with the material 21 are opened and a winding 12 is incorporated. The both end planes of the developed blocks 7a-7c are abutted to form a wound core. Thus, a one-turn cut type wound core consisting of the thin strip 1 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 a one-piece/cut-shaped wound iron core made of an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

Recently, wound cores used in stationary induction appliances, such as transformers, have
The use of amorphous magnetic alloy ribbon as the core material is being considered. This amorphous magnetic alloy ribbon is manufactured by quenching a magnetic alloy over a melt, and has excellent magnetic properties with very low core loss.

However, the amorphous magnetic alloy ribbon a has disadvantages in that it is very thin due to manufacturing reasons and is also brittle.

Therefore, when using a wound iron core made of amorphous magnetic alloy ribbon to make a transformer made of metal, for example, the joint part where the ribbon is continuously wound! Uncut wound cores without il are often used. However, the no-cut method not only has poor winding work efficiency because the winding must be directly wound around the winding core, but also makes the vjr surface circular in order to improve the core occupation rate in the winding 7 cylinder. There are disadvantages such as the need for a closely stepped structure and the complicated process for manufacturing the wound core of the multi-layer structure.

Therefore, a method of manufacturing a transformer using a one-turn cut-type winding core is used, in which a unit core is inserted into the winding every one turn. 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 around a circular winding form 2, making nine turns.
shall be. Next, as shown in FIG.
f: Pull it out and fasten it to the -gt-clap plate 4 of the winding body 3 with the tightening melt 5. In this state, cut the winding body 3 and the flange plate 4 along the cutting part 6 using a cutting machine. disconnect.

One of the two halves of the clamp plate 4 is removed from the gold winding body 3, and the winding body 3 is unfolded as shown in FIG. Here, a large number of amorphous magnetic alloy strips 1 whose lengths gradually increase are stacked. Then, as shown in Fig. 9, the amorphous magnetic alloy thin strip 1 is divided into multiple sets, and each sheet is shifted by a predetermined dimension in the length direction °r0. The strips 1 are stacked and have stepped edges at both ends to form a laminated block 7. This laminated block 7 is composed of a plurality of layers divided into a plurality of layers in the VC radial direction for each predetermined thickness of the entire wound core to be formed, and each layer has a plurality of sets having lengths corresponding to the circumferential length and thickness of each layer of the wound core. Laminated block 7
A, 7B, and 7C are used. Then, as shown in FIG.
7B and 7Cf are superimposed on the inside and outside of the valley laminated block 7 via the troughs, and the laminated blocks 7A to 7C are formed into an entire rectangular shape by applying pressure with an f-less mold 11 from all sides, for example. The stacked blocks 7A to 70 formed into a rectangular shape are bundled and subjected to strain relief annealing in an annealing furnace. Thereafter, each of the laminated blocks 7A to 7C is formed into a mouth shape with both end joints fully open. Next, as shown in FIG. 11, each of the laminated blocks 2A to 7Ci having a mouth shape is assembled into the windings 12 and 12, and then both ends g7a and 7b of each of the laminated blocks 78 to 7C are assembled.
A rectangular wound core 8 is assembled by bending the core 8 inward and abutting the two end faces forming the inclined surfaces. Then, the tightening band 13 is wound around the outer periphery of the wound core 8 (the outer periphery of the laminated block 7C), and the entire wound core 8 is tightened and fixed. Note that the inner core frame 9 is divided into two parts. Figure 12 shows the wound core 8.
The figure shows a state in which a built-in transformer is constructed by incorporating windings 12 and 12.

However, this conventional manufacturing method has the following problems. When assembling the wound core 80, when both ends 7a and 7bi of each laminated block 7A to 7C are bent at right angles inward and the end faces are butted, as shown in FIG. The end surfaces of the end portions 2b are often faced directly in front of each other and are not matched in length, but are butted against each other at positions shifted in the direction of the end surfaces. V
)-(FIP, ?-W-N-1-Iδzz±=l”JL
When IA-rF"r deviation δ occurs, the laminated blocks 7A~
The effective contact area between the abutted end faces of 7C decreases, leading to localized loss at the end face abutting portions and degrading the magnetic properties of the wound core 8. In this case, as described above, the outer periphery of the wound core 8 is tightened with the tightening band 13, and force is applied to the laminated blocks 7A to 7C in the circumferential direction of the wound core, so that the abutted end surfaces are aligned along the inclination direction. If it slides, the deviation δ between the end faces will decrease. However, the laminated blocks 7A~
7C is made by laminating amorphous magnetic alloy thin strips 1 one by one at different positions in the length direction, so the end face has a step equal to the thickness of each thin strip 1. The slope is stepped and has poor slip properties. For this reason, the amorphous magnetic alloy ribbon 1 at the end 7b may be bent, or a part of the amorphous magnetic alloy ribbon 1 at the end 7b may be wedged into the end 7a. A problem arises in that it is difficult to eliminate the shear between the abutted end faces of the laminated blocks 7A to 7C.

In addition, the amorphous magnetic alloy ribbon is thin and brittle, and it has the property of becoming extremely brittle especially after annealing. When assembling the wound core 8, if the above-mentioned phenomenon due to misalignment occurs on the abutting end faces of the laminated blocks 7A to 7C, an external force is applied to the amorphous alloy 4 band 1, causing the ribbon 1 to The core is easily damaged, the core assembling workability is poor, and the quality of the wound core is completely degraded.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and uses a one-tar/cut-shaped wound core made of amorphous magnetic alloy ribbon that has good magnetic properties, excellent quality, and ease of assembly. The purpose of this invention is to provide a method for manufacturing induction electric appliances.

[Summary of the invention]

The method for manufacturing a stationary induction electric appliance of the present invention involves laminating a large number of amorphous magnetic alloy ribbons and forming multiple sets of laminated blocks, each of which has an inclined surface on both ends, into a rectangular shape by stacking them upside down. Then, adhesive or adhesive tape is applied as a smooth surface forming material to at least one end face of each formed laminated block to make the end face a smooth surface.Then, the laminated block is fully opened and assembled into a winding wire, and then the laminated block is It is characterized by forming a j-iron core by butting both end faces of the j-iron core.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to drawings.

First, as in the conventional method, as shown in FIGS. 6 and 7, the amorphous magnetic alloy ribbon 1 is completely continuously wound to form a wound body 3, and a part of the wound body 3 is completely cut. Then, as shown in FIG. 8, it is developed to form a state in which a large number of amorphous magnetic alloys #f1 are laminated.

Next, as shown in FIG. 9, the laminated blocks 7A to 7C are formed by dividing the laminated blocks into a plurality of sets and shifting the amorphous magnetic alloy thin strips 1t, for example, one piece at a predetermined pitch in the longitudinal direction.

Next, the stacked stacked laminated blocks 7A to 7C are assembled with an inner core frame 9 metal, for example, as shown in FIG. 10, the blank blocks 7A to 7C are formed into a rectangular shape by press working.

Thereafter, strain relief annealing is performed on the laminated blocks 2A to 7C.

Laminated blocks 7A to 7 formed into rectangular shapes using the above-mentioned process
In C, the end surfaces of the respective end portions 7m and 7b are butted against each other. Therefore, as shown in FIG.
Adhesive 21 is applied to each end face of the end portion 7a of C and hardened. As the adhesive 21 to be applied, a room temperature curing type or rapid curing epoxy resin is used. When applying the adhesive, as shown in FIG.
At the end portion 2a, the adhesive 21 is applied as smooth as possible to the surface of the end face formed in a stepped shape by a large number of laminated amorphous magnetic alloy thin strips 1, and the layer of adhesive 21 forms the stepped surface. The shaped end face is formed into a smooth inclined surface. In addition, one end of each amorphous magnetic alloy ribbon 1 laminated in each laminated block 78 to 7C is coated with an adhesive 2 applied to the end surface.
1 and fixed together.

Next, as shown in FIG. 3, each laminated block 7A to 7C
Both ends 7m and 7bt are widened at right angles and all of the winding blocks 7A to 7C are formed into a shape, and the laminated blocks 7A to 7C are passed through the windings 12 and 12 and assembled.

Thereafter, as shown in FIG. 4, both ends 7m and 7b of each of the mouth-shaped laminated blocks 7A to 7C are bent inward at right angles so that the end face of one end 7& and the end face of the other end 7b are Butt-shaped, rectangular 1-tar/cut-shaped wound core 8
form.

Finally, a tightening band 13 is wound around the outer periphery of the wound core 8, and each of the laminated blocks 7A to 7Cf', with p attached, is fixed.

In this way, even if the outer point of the end surface of the other end 7B is shifted from the outer point of the end surface of one end 7a of the laminated blocks 78 to 7C, the tightening band 13 can be tightened by the force. The end face of the end part 7b moves smoothly in the direction of inclination of the end face along the adhesive 21 applied to the end face of the end part 7a, so that the end face of the end part 7a and the end face of the end part 7b are vertically opposed to each other. W can be matched well. Therefore, by tightening the tightening node 13, each laminated block? All the deviations between the end faces of A to 7C can be easily eliminated.

Moreover, the end portion 7a of each laminated block 7A to 7C is coated with adhesive 2.
1, the crystalline magnetic alloy #band 1 will not be dispersed, making it easy to handle the laminated blocks 7A to 7C.
The work of assembling A12, 12 and the assembly of the wound core 8 can be easily carried out, and the ends of the amorphous magnetic alloy ribbon 1 will not be damaged.

In the above-mentioned embodiment, the adhesive 21 was applied to make the end faces of the laminated blocks 7A to 7C smooth and sloped. However, the present invention is not limited to this, and as shown in FIG. The adhesive tape 22 may be completely adhered to the end face of the base plate to form a smooth inclined surface. Laminated! In addition to applying adhesive or adhesive to the end face of one end of locks 7A to 7C to make a smooth surface, also apply adhesive or adhesive to the end face of the other end to make it smooth. It is also possible to form a surface. The present invention is not limited to the case where an adhesive or adhesive tape is attached after annealing the wound core as in the above-described embodiment, but a heat-resistant adhesive or adhesive tape may be attached before annealing the core.

〔Effect of the invention〕

As explained above, according to the method for manufacturing a stationary induction electric appliance of the present invention, both end faces of the wound core and the laminated block constituting the stacked blocks are accurately butted together without shifting, thereby preventing the occurrence of local loss at this butting portion. It has excellent magnetic properties, has good workability during assembly work, and can prevent damage to the amorphous magnetic alloy ribbon.

[Brief explanation of drawings]

Figures 1 to 4 show an example of the manufacturing method of the present invention. Figure 1 is an explanatory diagram showing the process of fully applying the adhesive to the end face of the laminated block, and Figure 2 is an explanatory diagram showing the process of applying the adhesive to the end face of the laminated block. An explanatory diagram showing a fully enlarged end face of a laminated block, Figure 3 is laminated!
FIG. 4 is an explanatory diagram showing the process of assembling the wound core. FIG. 5 is an explanatory diagram showing an enlarged end face of a laminated block in another embodiment. FIG. 1 to 13 are explanatory diagrams showing a conventional manufacturing method. DESCRIPTION OF SYMBOLS 1...Amorphous magnetic alloy ribbon, 7A-7C...Laminated block, 7a*7b...End part, 12...Winding wire, 21.22...Smooth surface forming material. Applicant's Representative Patent Attorney Takehiko Suzue Figure 5 Figure 9 Figure 10 Figure 11

Claims (3)

[Claims] (1) Winding an amorphous magnetic alloy ribbon to form a wound body,
A step of cutting and rolling out this wound body to form multiple sets of laminated blocks having a large number of amorphous magnetic alloy thin strips each having sloped end surfaces; The process of stacking the laminated blocks and forming them into a square shape,
A step of attaching a smooth surface forming material to at least one end surface of each of the molded laminated blocks, a step of opening each of the laminated blocks and incorporating a winding wire, and abutting both end surfaces of each of the opened laminated blocks. 1. A method for manufacturing a stationary induction electric appliance, comprising the step of: forming a wound iron core using the same method. (2) The method for manufacturing a stationary induction electric appliance according to claim 1, wherein the smooth surface forming member is an adhesive. (3) The method for manufacturing a stationary induction appliance according to claim 1, wherein the smooth surface forming member is an adhesive tape.