JPH04320313A - Manufacture of transformer iron core - Google Patents

Abstract

PURPOSE:To achieve deviation to specific dimensions easily by utilizing a centrifugal force and vibration in a method for manufacturing a step-lap-cut-type transformer core with an amorphous magnetic alloy thin band as an iron core material. CONSTITUTION:While an iron core material 3 which is wound, cut, and laminated to specific dimensions is vibrated, it is inserted into a sliding mold 4 which is installed at a rotating rotating table 1, the rotating table 1 is rotated, and further vibration is applied to, thus achieving deviation to specified dimensions.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a step lap cut type transformer core using an amorphous magnetic alloy ribbon as the core material.

0002

2. Description of the Related Art The core of a transformer using an amorphous alloy ribbon as a magnetic material with low core loss must be shifted diagonally or in steps in order to improve the flow of magnetic flux at the joint. Up until now, this shifting work has been carried out by the manufacturer pressing or hitting each block with a mold that has a predetermined shape.

0003

[Problems to be Solved by the Invention] However, since the amorphous alloy ribbon is very thin and easily deformed, it is difficult to shift it, and it takes a considerable amount of time to shift it into a predetermined shape. In addition, because the friction between the laminated layers is small, it was necessary to perform the work carefully, such as how to apply subtle force when pressing, how to lightly press in the laminated direction to avoid unnecessarily shifting, and how to apply force. .

[0004] Therefore, the present invention eliminates manual shifting work and does not require the skill of the operator.

[0005]

[Means for Solving the Problem] In the present invention, after one or more blocks are inserted into a mold, a holding mechanism is provided on the end face in the width direction, and a staggered mold with a predetermined diagonal or stepped shape is provided. Insert it inside and pinch it with appropriate force, place the sliding mold on top of the rotary disk, and turn the rotary disk. Claim 2
Now, a plurality of the above-mentioned shifting molds are placed on a rotary disk, and the rotary disk is rotated. According to a third aspect of the present invention, the rotary disk is made to be able to vibrate, and the rotary disk is rotated while applying vibration.

[0006]

[Operation] Utilizing the characteristic that the amorphous magnetic alloy ribbon has a small coefficient of friction, one or more blocks are inserted in a staggered manner, and the side with the diagonal or stepped joint shape is placed on the outer circumference of the rotating circle. The laminated thin strips can be continuously pressed against the mold by the centrifugal force generated by rotating the rotary disk so that the laminated end faces can be shifted and aligned in a predetermined shape. According to a second aspect of the present invention, by mounting a plurality of the staggered blocks on a rotary disk and rotating the rotary disk, one or more of the plurality of blocks can be shifted and aligned in a predetermined shape at a time by centrifugal force. In claim 3, by applying vibration to the rotary disk according to claim 1 or 2 and rotating it, a beating effect due to centrifugal force and vibration can be achieved.
Furthermore, one or more blocks can be shifted and aligned more efficiently.

[0007]

EXAMPLE FIG. 1 shows the shifting step in the manufacturing method of the present invention. The laminated body 3 of the amorphous magnetic alloy ribbons which are rolled and cut have a trapezoidal shape as shown in FIG. 2, and the laminated body 3 is shown in FIG. The diagonal or step-shaped staggered mold 4 shown in FIG. 4 was inserted into a box made up of the staggered mold 4 and the push plate 5, and a presser 6 was used to prevent the ribbon from shifting or popping out in the width direction. By mounting the object on the rotary disk 1 and rotating it in the direction of arrow A or B in FIG. 1, the shape of the laminate 3' or 3'' shown in FIG. 5 is obtained. As shown in Fig. 1, a plurality of pieces are inserted into a box and applied with a presser 6 on a rotary plate 1.
By attaching it to the body and rotating it in the direction of arrow A or B, the shape of the laminated body 3' or 3'' shown in FIG. The core material is shaped into a laminate 3' or 3'' as shown in FIG.

[0008]

[Effects of the Invention] The manufacturing cost of the iron core can be reduced by making it possible to shift the iron core into a fixed shape without relying on the operator's intuition or skill level, without using any manpower. According to claim 2, a plurality of iron cores can be manufactured at one time. According to the third aspect, the iron core can be manufactured more efficiently and in a shorter time.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a shifting step in the manufacturing method of the present invention.

FIG. 2 is a perspective view showing a laminate of amorphous magnetic alloy ribbons after being rolled and cut in the shifting process.

FIG. 3 is a perspective view showing an example of a shifting type used in the shifting process.

FIG. 4 is a plan view of a staggered type showing another example.

FIG. 5 is a side view showing an example of a laminate after being shifted.

[Explanation of symbols]

1 Turntable 2　Shift type 3, 3′, 3″ laminate 4. Staggered type 5 Presser plate 6 Presser 7 Core metal C Joint part

Claims (3)

[Claims] [Claim 1] An amorphous magnetic alloy ribbon is used as the core material, and each core is composed of a plurality of blocks in which a predetermined number of sheets of the core material are stacked, and each block is staggered to a predetermined dimension in a stepped or inclined manner. In the method for manufacturing a step lap cut type transformer core in which both ends of the blocks are butt-joined and formed into a square shape, one or more of the blocks stacked in a predetermined number are cut diagonally or in a stepped shape. A transformer characterized by shifting the core material into a predetermined shape by placing it in a shifting mold installed on a rotary disk, applying a holding mechanism on the widthwise side, and then rotating the mold together. Iron core manufacturing method. 2. The method of manufacturing a transformer core according to claim 1, wherein the core material of a plurality of cores is shifted at one time by mounting a plurality of said shifting dies on a rotary disk. 3. The method of manufacturing a transformer core according to claim 1, wherein the rotary disk is subjected to vibration to cause rotational movement.