JPH06188134A - Manufacture of iron core of transformer - Google Patents

Abstract

PURPOSE:To form a laminated core with a cross section of a uniform thickness a manufacturing method for a transformer core wound in a step-lap-cut shape and made of amorphous magnetic alloy sheets. CONSTITUTION:An iron core wound and cut in given dimensions is separated into blocks 2 and put between a pair of holding plates 3. Then, one or several blocks 2 turned 180 degrees in a cross sectional direction around an axle 1 and then shifted in a sloped or stepped shape and one or several blocks 2 only shifted in a sloped or stepped shape and not turned on the vertical plane are laminated alternately so that a transformer core is formed in an angular shape.

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-wrap cut type transformer core using an amorphous magnetic alloy ribbon as a core material.

[0002]

Amorphous magnetic alloy ribbons are used as magnetic materials having low iron loss. However, this amorphous magnetic alloy ribbon has a plate thickness deviation as shown in FIG. 8, and depending on the material, it has a plate thickness deviation value of several micrometers. When a predetermined number of these amorphous magnetic alloy ribbons are laminated in a transformer, a portion larger than a predetermined lamination dimension can be formed as shown in FIG. 9, and the dimensions of each component of the transformer have an unnecessarily large margin. Is required, and the transformer itself becomes large.

Heretofore, when the iron core material wound in a hoop shape is wound, at the time when the iron core material is wound a predetermined number of times, the iron core material or the winding side is inverted once or several times, so that the influence of the plate thickness deviation is affected. Has been reduced.

[0004]

However, in the above method, it is necessary to stop the winding once or several times when performing the reversal, cut the core material each time and perform the reversal, and then restart the spliced winding. There is. At that time, since the one wound in the shape of a hoop is large and has a large mass, it takes time and labor, and the operation rate is lowered, and it takes a lot of time to manufacture the iron core.

In view of this, the present invention provides greater flexibility in handling the iron core material, and allows the iron core material to be easily inverted during winding without splicing.

[0006]

[Means for Solving the Problems] A hoop-shaped iron core material made of an amorphous magnetic alloy ribbon is wound and cut by a necessary amount and separated into blocks of a predetermined number or a predetermined thickness. Next, the separated block is 180 ° in the thickness direction.
After rotating it and shifting it in a slope or step,
Or, it may be slanted or stepped and then rotated 180 ° in its thickness direction, and 180 ° in its thickness direction.
° What is slanted or stepped without rotating,
Alternate one block or several blocks, then
Both ends of the laminated block are butted and joined to each other to form a square shape.

[0007]

After the block is formed in this manner, the block is rotated 180 ° in the thickness direction and then shifted in the inclined or stepwise manner, or the block is rotated in the inclined direction or stepwise and then 180 ° in the thickness direction. One that is rotated by ° and the other that is rotated in 180 degrees in the thickness direction without being rotated by 180 degrees in a slanted or stepped manner are alternately laminated, and then both ends of the laminated blocks are butted. By joining them together and forming them into a square shape, it is possible to manufacture an iron core with a uniform stack thickness.

[0008]

1 to 8 show an embodiment according to the present invention. First, a necessary amount of an iron core material having a plate thickness deviation, which is wound into a hoop shape, is wound. Next, the wound one is cut into a laminated body 4 of iron core material as shown in FIG. Next, the laminated body 4 of the iron core material is separated into a predetermined number or a predetermined thickness as shown in a block 2 in FIG.

Next, the block 2 is shown in FIG.
Installed in between and rotated 180 ° in the direction of arrow A, that is, in the thickness direction with respect to the rotation axis 1, and then shifted in a slanted or stepwise manner as shown in FIG. 4 (A) or (B). The blocks 5a and the blocks 5b in which the blocks 2 are not rotated by 180 ° in the thickness direction but are shifted in a slanted or stepwise manner are alternately laminated one by one as shown in FIG. 5, and both ends thereof are butted and joined. By molding into a rectangular shape as shown in FIG. 6, a uniform transformer core whose cross section along the line ZZ is shown in FIG. 7 is obtained.

[0010]

As described above, an iron core having a uniform laminated thickness can be easily manufactured by using a relatively simple device.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a rotation method in a thickness direction in a manufacturing method of the present invention.

FIG. 2 is a side view showing how an amorphous magnetic alloy ribbon wound in a hoop shape is unwound.

FIG. 3 is a side view showing blocks laminated in a predetermined number or a predetermined thickness.

FIG. 4 is a side view showing a block that has been shifted.

FIG. 5 is a side view showing a stack of blocks that have been shifted.

FIG. 6 is a perspective view of the iron core after corner forming.

FIG. 7 is an enlarged cross-sectional view taken along line ZZ of FIG.

FIG. 8 is an enlarged sectional view of an amorphous magnetic alloy ribbon.

FIG. 9 is an enlarged cross-sectional view similar to FIG. 7 when the blocks are sequentially stacked without rotating 180 ° in the thickness direction.

[Explanation of Codes] 1 Rotation axis 2 Block 3 Scissors plate 4 Laminated body of iron core material 5a Block after being rotated by 180 ° and shifted 5b Block after being rotated without being rotated by 180 °

Claims (1)

[Claims] 1. A hoop-shaped iron core material made of an amorphous magnetic alloy ribbon is wound by a necessary amount and cut, and divided into blocks of a predetermined number or a predetermined thickness. Separate the block in the thickness direction 180
One rotated in the thickness direction after being rotated by 180 ° in the thickness direction, or one rotated in the thickness direction after being rotated in the inclination direction or the step shape after being rotated by 180 °
Transformers that are not rotated by 80 ° but are shifted in a slanted or stepped manner are alternately laminated one block or several blocks, and then the both ends of the laminated blocks are butted and joined to form a rectangular shape. Iron core manufacturing method.