JPS6199912A - Preparation of magnetic head - Google Patents

Abstract

PURPOSE:To curtail remarkably a man-hour for working, and to stabilize a magnetic characteristic by working a winding window by an energy beam to a magnetic head on which a magnetic core having a worked small window and an auxiliary material have been laminated. CONSTITUTION:A core half 7a consisting of a magnetic material, and a core half 7b to which a groove 4 for determining a gap depth has been formed by butting are butted through a nonmagnetic gap spacer 6, and formed as one body, by which a magnetic core is made. Subsequently, a magnetic head block 9 is made by sticking a reinforcing plate 8 to both sides of the magnetic core 7 and forming them as one body, and to this head block 9, a winding window working is executed by an energy beam. In this way, a work man-hour for forming a winding window can be curtailed, also a magnetic characteristic can be determined exactly, and also a magnetic head which exerts no bad influence on the winding can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method of manufacturing a magnetic head, and particularly to a step of forming a winding window during the manufacturing process.

<Description of Prior Art> Conventionally, when processing a winding window in a magnetic head having a reinforcing material, the following method has been used. That is, as shown in FIG. 1(A), the groove 1 is
a (1b) is first formed by grinding and molding. A pair of blocks 1O are prepared, and these are butted and brought into close contact with the gap portion with a non-magnetic gap spacer 11 interposed therebetween.
By cutting the welded wire along broken line C as shown in FIG. 1(B), a single magnetic core having a winding window as shown in FIG. 1(C) is formed.

On the other hand, a reinforcing plate 3 made of a non-magnetic material as shown in FIG. 1(D)
A (3b) is also pre-processed with a winding window, and by aligning and pasting such a reinforcing plate 3m (3b) and the magnetic core alone, a structure as shown in Fig. 1(E) is obtained. A magnetic head having a winding window is obtained.

However, when considering this manufacturing method, it was found that in order to form one winding window, it was necessary to process all of the pair of magnetic core halves and the pair of reinforcing plates, which increased the number of man-hours. .

In addition, as shown in FIG. 1(F), magnetic cores 2a, 2b and reinforcing plates 3a, 3b are
This has the disadvantage that a step is created between the wires and the windings, which may cause the windings to break.

(Objective of the Invention) The present invention has been made in view of the above-mentioned drawbacks, and it is possible to significantly reduce the number of man-hours required for processing the winding window, and to stabilize the magnetic properties without adversely affecting the single winding. The purpose of the present invention is to present a method for manufacturing a magnetic head that can maintain the following characteristics.

<Explanation based on examples) Hereinafter, the present invention will be explained based on examples.

FIGS. 2A to 2D are diagrams showing each step of a method for manufacturing a magnetic head as an embodiment of the present invention. Figure 2 (A
) shows a magnetic core 7 formed by integrating a core half 7a made of a magnetic material and a core half 7b provided with jII44 for determining the gap depth by butting them together via a non-magnetic gap spacer 6. There is. Further, FIG. 2(B) shows a core reinforcing plate 8 made of a non-magnetic material.

Next, reinforcing plates 8 are attached to both sides of the magnetic core 7 and integrated to obtain a magnetic head block 9 as shown in FIG. 2(C). And this head block 9 is hit by an energy beam lol
Winding window processing is performed as shown in Figure 42 (D).
This step will be explained in more detail below.

FIG. 3 is a diagram showing a winding window processing process using an energy beam. In FIG. 3, 9 is a magnetic head block;
2 is a laser oscillator, 13 is a beam bender, 14 is a focusing optical system, 15 is a jig, and 16 is an XY table.

In the above-described configuration, the magnetic head block 9 in which non-magnetic reinforcing plates 8 without winding windows are attached to both sides of the magnetic helad core 7 is set on the jig 15, and the energy beam is focused using the XY table 16. The light point is core block 9
Position it so that it is on the reference point. Then, at the same time as the energy beam is emitted, the XY table 16 is continuously moved along a locus that is offset inward by the condensing radius of the energy beam with respect to the desired winding window shape to form a winding window. .

In this way, winding windows are processed by cutting or drilling holes in a laminated magnetic core block made of a laminate of a magnetic core and a reinforcing plate using an energy beam. Winding window processing, which was previously done separately, can now be combined into one process, making it possible to significantly reduce the number of man-hours required. Also, to apply winding window processing in the laminated state.

There is no misalignment of the winding window between the magnetic core and the reinforcing plate, and there is no step on the side of the winding window, so there will be no negative effects such as disconnection of the first winding. Since a small window is formed to determine the magnetic field, a magnetic head with extremely stable magnetic properties can be obtained.

In the above embodiment, the energy beam is continuously generated and the XY table is continuously moved to cut the laminated magnetic core block to obtain the winding window shape. It is also possible to determine the winding window shape by drilling holes in the core block and overlapping several holes. In particular, it is desirable to form the wire winding window by this method when the shape of the wire winding window is not so large compared to the condensing diameter of the energy beam or when the material is made of a material that tends to cause thermal brittleness.

<Description of Effects> As explained above using the examples, according to the method for manufacturing a 51-wire head of the present invention, the number of man-hours for forming a single winding window can be reduced, and the magnetic properties can be accurately determined. It is possible to obtain a magnetic head that can be determined without any adverse effect on the windings.

[Brief explanation of the drawing]

Figures 1 (A) to (F) are diagrams showing each step of a conventional magnetic head manufacturing method, and Figures 2 (A) to (D) are diagrams showing a magnetic head manufacturing method as an embodiment of the present invention. A diagram showing each process. FIG. 3 is a diagram showing a winding window processing process using an energy beam. 5 is a winding window, and 6 is a small window for setting the gap depth. 7 is a magnetic core, 8 is a reinforcing material, 9 is a magnetic head block,
12 is a laser oscillator, 13 is a beam bender, 14 is a focusing optical system, 15 is a jig, and 16 is an XY table. Figure 1 (C) (D) (E)

Claims (1)

[Claims] A method for manufacturing a magnetic head, which comprises processing a winding window using an energy beam on a magnetic head in which a reinforcing material and a magnetic core with a small window processed therein for determining a gap depth are laminated.