JPH04320310A - Manufacture of transformer iron core - Google Patents

Abstract

PURPOSE:To enable a square shape to be formed easily by utilizing a characteristic of an iron core material in a method for manufacturing a transformer iron core in step-lap-cut-type winding with an amorphous magnetic alloy thin band as the iron core material. CONSTITUTION:A shaft 3 and iron core golds 6' and 6'' are mounted on an iron core material 1 which is piled up in specific dimensions, an iron core material 1 is joined one block at a time along a shaft 3, a silicon steel band for protection 2 is mated and fixed finally, and then the iron core golds 6' and 6'' are expanded up and down, thus forming a square 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 lap cut type transformer core using an amorphous magnetic alloy ribbon as the core material.

0002

2. Description of the Related Art A transformer core using an amorphous magnetic alloy ribbon as a low-loss magnetic material must be joined in an inclined or stepped manner in order to improve the flow of magnetic flux at the joint. Furthermore, in order to attach the windings and to minimize the internal dimensions of the transformer, the core must be formed into a rectangular shape.

[0003] Up until now, joining and corner forming operations involve wrapping and joining one block of core material around a rectangular core metal formed to a predetermined size. Alternatively, it has been carried out by cutting a single sheet or multiple sheets to a specified size, wrapping it around a cylindrical or square winding form, and in the case of a cylindrical winding form, removing it from the winding form and driving a square forming core. .

0004

[Problem to be Solved by the Invention] However, since the amorphous magnetic alloy ribbon is very thin and difficult to deform plastically, the former method requires some labor or a complicated mechanism for joining. there were. In addition, the latter requires a large amount of time to cut.

[0005] Therefore, in the present invention, the core material is thin and has no stiffness, so that it can be easily formed into a rectangular shape.

[0006]

[Means for Solving the Problems] In the present invention, a trapezoidal core is formed by laminating a predetermined number of core materials and stacking a predetermined number of blocks shifted in an inclined or stepped manner on a protective silicon steel strip. The center of the trapezoid is clamped by two shafts fixed to the short sides of the trapezoid and a clamp plate placed on the long sides of the trapezoid, and the core metal placed between the two shafts is clamped. Then, one block at a time is joined along the shaft, and after all the blocks are joined, a protective silicon steel strip is joined and fixed, and after the two shafts are removed, the core bar is expanded in the vertical direction.

[0007]

[Operation] Due to the properties of the core material and its alignment with the shaft, the work is simple and each block can be joined with almost no human effort required. Furthermore, the mechanism is simple, with only linear movements such as clamping and expansion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 6 show an example of the process carried out in the present invention. As shown in FIG. 1, the core material 1 is stacked on a protective silicon wire strip 2 in a staggered manner in blocks.
By installing the shaft 3 and the core metal 6 to predetermined dimensions as shown in FIG. Hold it and align it along the shaft 3 as shown in Figure 3.
Sequentially overlay each block in the shape shown in .

After a predetermined number of layers have been overlapped, the protective silicone rope 2 is fixed at a predetermined position to form the shape shown in FIG. Next, by expanding the expansion rods 7 and 8 shown in FIG. Form a step-lap cut iron core of the shape.

0010

Effects of the Invention: By eliminating a large amount of manpower and time and easily forming the core into a square shape, the manufacturing cost of the core can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side view of the iron core material.

FIG. 2 is a perspective view showing the corner forming step of the manufacturing method according to the present invention.

FIG. 3 is a side view showing the process of overlapping blocks.

FIG. 4 is a side view of the core material after joining.

FIG. 5 is a perspective view showing an example of the mechanism used.

FIG. 6 is a side view of the core material after corner forming.

[Explanation of symbols]

1 Iron core material 2 Protective silicon rope belt 3 Shaft 4 Clamp plate 5 Cylinder 6, 6’, 6” core metal 7, 8 Expansion rod 9 Expansion cylinder 10 Side plate

Claims (2)

[Claims] Claim 1: An amorphous magnetic alloy ribbon is used as the iron core material, and the iron core is composed of a plurality of blocks in which a predetermined number of the iron core materials are stacked, and the blocks are shifted in an inclined or stepped manner. , a method for manufacturing a step-lap cut transformer core in which both ends are butt-joined and formed into a square shape, in which a predetermined number of the above-mentioned blocks, which are shifted to a predetermined dimension in an inclined or stepped manner, are placed on a protective silicon steel strip. The process of laminating to form a trapezoidal core, fixing the two-divided rectangular forming core bar and two shafts to the short side of the trapezoidal core, and fixing the two shafts from the long side of the trapezoidal core. The process of pressing the plate against the trapezoid and clamping the center part of the trapezoid, and wrapping the unclamped ends of the trapezoid core from the short side of the trapezoid along the two shafts in each block in order, A process of overlapping both ends, and a process of forming the iron core material into a square shape by overlapping and fixing the protective silicon steel strips and expanding the two upper core metals for square shape forming. A method for manufacturing a transformer core, which is characterized by: 2. The method for manufacturing a transformer core according to claim 1, wherein the protective silicon steel strip is a thin metal, an insulating sheet, or a stop band.