JPS58148419A - Manufacture of amorphous core - Google Patents

Abstract

PURPOSE:To obtain the cut core having no magnetic loss at the joining part by a method wherein the cut face formed according to cutting processing is made as the joining face with the other core to form a closed magnetic circuit, and it is finished smoothly. CONSTITUTION:A core material body 3 obtained by laminating core plates 2 formed by performing punching processing of rectangular windows 6 to an amorphous thin belt 1 is cut in order from the edge on one side along the lines 7a meeting at right angles with the centers in the longitudinal direction of the respective windows 6, and the lines 7b to cross the centers between the two windows 6 forming a line in the longitudinal direction, and the E-type cut cores A of a large number are formed. The cut core A thereof is to constitute the closed magnetic circuit by joining the section 4 along the line 7a crossing the window 6 to the other core, and even when a crack is generated at the circumferential edge of the window 6 when punching processing of the amorphous thin belt 1 is performed, no crack is generated at the section 4, and because the section 4 forms the smooth face being cut by a GC cutter or a diamond cutter, the section 4 thereof can be made to come in contact closely with the other core.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an amorphous core, and more particularly, to a method for producing a cut core by cutting a core material obtained by laminating a plurality of amorphous thin plates. It is something.

Iron-based amorphous ribbons, which are generally used as magnetic materials, have excellent magnetic properties such as low core loss and high magnetic permeability, similar to silicon steel strips, and are therefore widely used as core materials. However, as shown in the table below, typical iron-based amorphous ribbons have significantly higher hardness and tensile strength than silicon steel, which is crystalline steel.

Composition Hardness Hv) DPII Tensile strength / -F,,P, 700 -F
@16 B-1080350 F@, Z,,. 640 2
20F,,oP,,C,76031G '6n B1゜S;tt 9 10
．． 140F, , MO, C1, 970390 Fe, , Cy, , ] to C,, 900330F, Cr
t,MO,,C,,,113040G silicon
Steel 120 35 By the way, amorphous ribbon is a ductile material that undergoes significant plastic deformation when combined with inorganic glass, so it can be punched. , amorphous metals undergo extreme non-uniform deformation at room temperature, so as shown in Figure 1, an amorphous thin plate (1
) When punching out the core plate (2), cracks occurred along the punch line and the edges could not be aligned in a straight line.As a result, as shown in Figure 2, the core plate (2) In the core material (3) obtained by laminating 2), abutting surface (4) with another core (4) K unevenness (6) appears,
When forming a closed magnetic path by butting the iron cores of this butting surface +4+Km, the magnetic resistance at the butting part increases,
The accompanying increase in excitation current causes losses such as iron loss to increase. was there.

The present invention has been made in view of the above points, and its main purpose is to smooth the abutting surface with another core used to form a closed magnetic circuit, and to The objective is to create a cut core with no magnetic loss.

The present invention will be described in detail below based on embodiments shown in the figures. The method for manufacturing an amorphous core according to the present invention includes forming a window (6) in an amorphous ribbon f1+ by punching, and forming a core plate (2
), and then attach multiple core plates (2) to each other's windows (
6) are matched and laminated to form a core material (3), and then the core material (3) is cut by cutting along a line that crosses the window (6), and this cut surface (4) is This method is characterized by obtaining a cut core that serves as a butting surface with another core. As shown in FIG. 3 and subsequent figures, this embodiment shows an example in which an E-shaped cut core (4) is formed. As shown in Figure 3, the core plate (2) is made by punching two rows of iron-based amorphous ribbons (1) and a large number of rectangular windows (6). A core like the one shown in FIG. Obtain bulk material (3). In this case, each core plate (21) is coated with resin and then laminated, or after lamination, resin is attached to the surface of the core material (3) and each core plate (2) is bonded with the resin. The core material (3) is kept in a predetermined shape.The core material (3) created in this way is then successively molded from one end to the other, as shown by each imaginary line in FIG. @ f
1 (7a) perpendicular to the center of the longitudinal direction of i+ and a line (7b) that crosses the center of the two windows (6) arranged in the longitudinal direction, such as a G-G cutter or a Tie 'p C seat cutter. A large number of E-shaped cut cores are produced by cutting as shown in FIG. 4 using a cutting tool (8).

This force/Sitcore prisoner is the line (7) that crosses the window (6) above.
The cut surface (4) along a) is butted against another core (not shown) to form a closed magnetic circuit, and a window (6) is formed during punching of the amorphous ribbon (1). Even if a crack occurs at the periphery, this crack will not appear on the above-mentioned cut surface (4), and the cut surface (4) will be a smooth surface cut by a GE cutter or a tire cutter. Therefore,
This cut surface (4) can be brought into close contact with other iron cores over the entire surface. In this example, an E-shaped cut core was formed by cutting the core material, which is a laminate of core plates (2) in which two rectangular windows (6) are arranged in the width direction of the amorphous ribbon. Although an example has been shown, the present invention is not necessarily limited to this, and by changing the shape or arrangement of the windows (6), a T-shaped or L-shaped cut core can be created. Even in cases where windows are punched into simple shapes such as rectangles or squares, E-type,
This eliminates the occurrence of large racks at the corners that occur when punching core pullets of complex shapes such as L-shapes and T-shapes.

In the present invention, as described above, one amorphous ribbon Km is formed by punching to create a corer, and a plurality of core plates are stacked with their windows aligned to form a core material. Then, the core material is cut along a line that crosses the window to obtain a cut core with this cut surface serving as the butting surface with another core, so the peripheral edge of the window is cut by punching. Even if a crack occurs in the cut core, this crack will not appear on the cut surface of the cut core, and the cut surface can be finished into a flat surface by cutting. As a result, it is possible to perform punching and cutting of simple shapes. In addition to being able to create cut cores of multiple shapes when used in combination, other iron cores used to form a closed magnetic circuit can be brought close to this cut surface over the entire surface, such as when the cut surface is uneven. This has the advantage that it can prevent an increase in magnetic resistance and provide a cut core with less loss such as iron loss.

[Brief explanation of the drawing]

Fig. wJ1 is a plan view showing problems in conventional punching of an E-shaped core plate directly from an amorphous ribbon, Fig. 2 is a schematic perspective view showing a core material made by laminating the same core plates, and Fig. Figure 3 is a plan view showing a core plate obtained by punching windows into an amorphous ribbon according to the present invention, Figure ¥J4 is a perspective view showing the cutting process of a core material which is a laminate of the same core plates; FIG. 5 is a perspective view showing a cut core obtained by the present invention, in which (ri is an amorphous ribbon, (2) is a core plate, (3) is a core material, (4) is a cut surface, (6) is a window. Agent Patent attorney Stone 1) Long 7gR4 figure 5 figure Δ

Claims (1)

[Claims] (1) Create a core plate by forming windows in an amorphous ribbon by punching, stack multiple core plates with their windows matching each other to form a core material, and then cross the windows. A method for manufacturing an amorphous core, which comprises cutting a core material along a line by cutting to obtain a cut core in which the cut surface serves as a butting surface with another iron core.