JPH0417313A - Manufacture of iron core for stationary induction apparatus - Google Patents

Abstract

PURPOSE:To eliminate a need for a high-cost automatic cutting apparatus, to reduce the effort of an iron assembly operation and to prevent an iron core from being damaged by a method wherein an iron-core material formed by circularly winding a magnetic material continuously is deformed to be an ellipse shape, it is wound on a rectangular mandrel and pressed from four sides to constitute a one-winding portion for the iron core and this operation is repeated a required number of times. CONSTITUTION:At an iron core 17 for stationary induction apparatus use, 5 to 1000 turns of an iron-core material for one winding turn of the iron core 17 of a lap-cut type are wound continuously by using an amorphous magnetic material or a thin-belt magnetic material having a thickness of 100mum or lower. When the iron core is manufactured, the following processed are executed: a process to wind said magnetic material circularly and to form the iron-core material 11; a process to deform the iron-core material 11 to an ellipse shape in such a way that inner circumferential faces of the iron-core material 11 form parallel faces at an interval of 10 to 20mm and to wind the iron-core material 11 on a rectangular mandrel 13; and a process to press the wound iron-core material 11 from four sides. In addition, said three processes are repeated a required number of times on the wound iron-core material 11. After that, the following are executed: a process to apply a backplate 6 to the outer circumferential face of the iron core 17 and to pressurize and hold it to be rectangular in shape by fastening a band or the like; a process to anneal the iron core 17 while it is pressurized and held to be the rectangular shape; and the like.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of manufacturing an iron core for a static inductor such as a transformer using an amorphous magnetic material or a thin magnetic material having a thickness of 100 (μm) or less. It is.

"Conventional technology" An example of a conventional manufacturing method for a lap-cut wound core is shown in the second example.
This will be explained based on the diagram. ■First, after cutting the magnetic material 1 one by one to the specified dimensions for one winding, ■rolling the magnetic material one by one with the cut surfaces shifted one by one, ■pressing the iron core 2 into a rectangular shape, and forming a rectangular core metal. 3 into the iron core. Next, the iron core 2 and the core metal 3 are bound together with a band 4 via a backing plate 6 and annealed. ■After completion of annealing, core metal 3. Band 4. Remove the backing plate 6.

It is done in this process.

``Problem to be Solved by the Invention'' The lap-cut wound core requires cutting thin, hard magnetic material one sheet at a time to the specified dimensions for one turn. In addition, since the cut surfaces are shifted one by one and rolled up in a circle, cutting and shifting a large number of thin magnetic materials requires a great deal of labor and expensive automatic cutting equipment. In addition, when a thin and brittle material such as an amorphous magnetic material is used, the core is often damaged or the magnetic properties are deteriorated when the core metal is inserted into the core.

"Means for Solving the Problem" In the present invention, the magnetic material is continuously wound 5 to 1000 turns without cutting the magnetic material one by one, so that the inner peripheral surfaces of the circularly wound iron core material are connected to each other. Interval 10mm~20m
It is deformed into an ellipse so that it has parallel planes of m, and is wound around a rectangular metal core and pressed from all sides to form one turn of the iron core. By repeating this a required number of times, the iron core of the stationary inductor is formed.

"Function" According to the present invention, by continuously winding the magnetic material,
It becomes possible to manufacture iron cores, eliminates the need for expensive automatic cutting equipment, and reduces the labor required for manufacturing, improving productivity.

"Example" An embodiment of the present invention will be described based on FIG.

An amorphous magnetic material or a thin magnetic material with a thickness of 100 (μm) or less is continuously wound for 5 to 1000 turns, and the circularly wound iron core material 11 is wound into two pieces with a diameter of 10 to 20 mm. The inner peripheral surfaces of the iron core material 11, which is hooked onto a pin 12 and wound round by spreading the pin 12 left and right, have an interval of 10 to 2.
The iron core material 11 is deformed into an ellipse so as to have parallel surfaces of 0 mm, and in that state, the center part of one outer peripheral surface of the iron core material 11 is attached to a rectangular core metal 1.
3, and press it from the other outer peripheral surface of the iron core material 11 using a press machine 14. Next, the pin 12 is moved to wrap the iron core material 11 around the core metal 13, and the press machine 15 presses it. Next, a press machine 16 is used to press the iron core material 11 to the extent that the pin 12 can be removed, and the pin 12 is removed. Next, the core material 11 wound around the core metal 13 is pressed using a press machine 16 so that the inner circumferential surfaces of both ends of the core material 11 are in contact with each other.

The above is the process for one winding of the iron core 17. This process is repeated a required number of times on the iron core 11 wound around the metal core 13, so that the iron core has a specified size.

In this case, it goes without saying that the length of the core material after the second turn is gradually made longer than the circumference of the core material for one turn.

Next, the rolled-up iron core 17 is bound together with the metal core 13 via the patch plate 6 with the band 4, and annealed. Then band 4. The production is completed by removing the backing plate 6 and core bar 13.

"Effects of the Invention" As explained above, according to the present invention, it is not necessary to cut a large number of thin, hard magnetic materials, thereby eliminating the need for expensive automatic cutting equipment, and by winding thin magnetic materials to create a thick Since the iron core can be made using recycled iron core material, the labor for assembling the iron core can be reduced.

Furthermore, since there is no need to insert the metal core into the iron core, the iron core will not be damaged.

[Brief explanation of the drawing]

FIGS. 1 and 2 are manufacturing process diagrams of a lap-cut wound core, respectively. FIG. 1 shows one embodiment of the present invention, and FIG.
The figure shows a conventional example. In the figure, 1 is a magnetic material cut one by one, 2 and 17 are iron cores, 3 and 13 are core metals, 4 is a band, 5, 14, 15, and 1
6 is a press machine, 6 is a backing plate, 11 is an iron core material, 12 is a pin, and 7 and 18 are lap parts. Figure 2

Claims (1)

[Claims] It is a wrap cut type wound core, and the core material per turn of the core is an amorphous magnetic material or 100 (μm)
5 to 10 times continuously using a thin magnetic material with a thickness of less than
In a method for manufacturing a core for a stationary inductor wound with 00 turns, (1) the step of winding the magnetic material into a core material, and (2) the step of forming a core material with an interval between the inner circumferential surfaces of the core material. The number of man-hours required to deform the core material into an ellipse so that it has parallel surfaces of 10 to 20 mm, and to wrap the core material around a rectangular core metal.
(3) The process of pressing the wrapped core material from all sides and the steps of (1) to (3) above are repeated the required number of times on top of the wrapped core material, and then a patch plate is applied to the outer circumferential surface of the core and the band is pressed. A method for producing an iron core for a stationary inductor, which comprises the steps of: pressurizing and holding the core in a rectangular shape by tightening, annealing the iron core while pressurizing and holding it in a rectangular shape, and removing a core, a cover plate, and a band.