JPS589212A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To perfom invariable accurate sizing by coupling each core material with coupling parts at recessed parts made in each core material when punching a ferromagnetic metallic sheet to obtain plural core materials. CONSTITUTION:Recessed parts 11 are formed in the external surfaces 14 and 15 of extension parts 13 extending sideward from both sides of the main body part 12 of a core material 8 and at those recessed part 11, the core material 8 is coupled with coupling parts 10. Each coupling part 10 is made nearly trapezoid in such a way that the part is thick on the side of a supporting part 9 and becomes thinner gradually toward the core material 8. consequently, even if part of the coupling part 10 remains as a burr at the core material when the core material 8 is disconnected from the coupling part 10, the flash is inside of the recessed part 11 and never protrudes from the external surfaces 14 and 15 of the core material 8. Therefore, invariably accurate sizing is performed on the basis of those external surfaces 14 and 15.

Description

[Detailed description of the invention] Honji @□ha, vIs! Each core material is connected to the support part for supporting the core material via the connecting part! ! In this state, these 4I core materials are punched out from the GI magnetic energy saving sheet, and then, after cutting these plurality of core materials from the support part, they are laminated on each other to form a head. The present invention relates to a method of manufacturing such a magnetic head.

Recently, conventional methods such as punching multiple core materials from ferromagnetic metal sheets such as amorphous (7% FASS) ferromagnetic alloys have been developed, for example, as shown in $1111, each core is The material (1B is punched out while being relatively connected to the support part (2), which serves as a frame body, through the connection 1II (3), for example, Q, 15. Next, each material (11) is separated from the supporting part (2) at the joint part (4) with the connecting part (3) and stacked on top of each other. In such conventional methods, a predetermined polishing process is performed to form a head; , for example lli (5)
Each core material 11+ and part Ii 1 (3) were connected to each other in the process.
When it is cut from the core material, there are many cases in which the tin remains on the core material (mu) as a particulate material, resulting in this one drawback.

The present invention has been made in view of these problems, and provides a magnetic head that does not affect the reference plane even if the above-mentioned paris remains and can accurately achieve dimensional accuracy of the head. Hereinafter, the present invention will be explained by way of example with reference to FIGS. 11 and 2 to 6.

As shown in Fig. 2, each core material seal 8) configured in a rectangular shape is connected to a support part (9) similar to the example shown in Fig. 1K1 via a connecting part (11). ◎Such punching can be performed, for example, by pressing, etching, etc. ・Each material (8) has a recess a.
υ is provided.1. ;A member (8) and connection m1 (111) are connected to each other at these recesses aυ.For example, in the example of Fig. 421, ;A member (8) main body portion tta
The outside Iki of the exposed part 0 that aaS to you from both ends of
(141 (15 has a large concave iluυ,
The core material (8) and the connection S4 are connected through these recesses I#c. On the other hand, the connecting part has a trapezoidal shape, and the mist of support 11191 is thick;
) so that it gradually becomes thinner as it approaches −
Ru. From this point, the connecting member is made to be easy to break at a distance close to the core material (8), and in most cases, the thinnest part,
That is, the prayer can be performed at a portion near the joint portion ae with the core material (8).

With such a configuration, when core #(8) is separated from the connecting member, a part of the connecting member becomes a part of the core material 18.
), such a hole is inside the concave fsaυ and does not protrude from the outer surface G414 of the core material (8). Therefore, accurate dimensioning can always be carried out using these outer surfaces 114 and/or 4 as reference surfaces.

In the example of the second Bi11, which body part a of the core material 18
A recess s11 is provided on both 11iI fins of the trout, and the butterfly 1 cap of these recesses is connected to the connecting part qtI.
・Therefore, even in this case, 11m1llI of main body 0
The example in Figure 20 is an example in which the connecting part a is connected to the connecting part a at the end face αSJ4 of both extensions aS and part aj of 8f, and the hollow connecting part aO is connected to the end face φ in the recess aυ provided in usco
It is connected with -. Therefore, even in this example, end 11
(11G11) are not affected by Paris and are solid, so they can be used as reference planes.

Each core material (8) punched out from a ferromagnetic sheet as described above is folded at the connection part (the connection part αe with the IG) and separated from the support part (9). The number of core materials (8) required to form the core materials (8) are laminated and bonded to each other. At that time, for example, as shown in FIG. 211 and the outer side mi4 are used as reference planes, and apply pressure from the direction of the -1 arrow to align the positions of the core materials (8).And,
As shown in Figure 4, you apply pressure to these to harden the adhesive. At this time, in this example, the recess Oυ prevents the influence of particles, so It can be used as a reference surface for accurate positioning.

The core material (8) laminated in this way is, for example,
As shown in Figs. 11I and 116; at this time, the core material (8) is
The outer surface α of the sses and the side surface I of the butterfly of the main body are respectively used as reference planes. Even in this case, in this example, the recess I prevents the influence of paris, so the outer Accurate dimensions can be determined by using the swan as a reference.

The core material (8) that has been polished for dimensioning is polished to form a gap if necessary, and then the left and right sides are joined together via a gap spacer. Inside the specified shield case (inserted and fixed, tape contact ■ is formed by polishing) In addition, as a method to simplify positioning when stacking each core material, The following method can also be considered: In other words, the required number of ferromagnetic sheets (for example, Barmaro, A, Sendust, A4 Jkp 7 As alloy, etc.) are laminated and bonded in advance, and then a predetermined shape is formed. The core material is cut out using wire-cut electrical discharge.In this way, each core material is cut out while being stacked on top of the other, making the production of the head core very simple.
As explained above, in the present invention, when punching out a plurality of core materials from a ferromagnetic metal sheet, each of the core materials and the connecting portion are connected to each other in the recesses provided in each core material. There is. Therefore, when separating each core material from the supporting part, a part of the connecting part remains on the core material; even if it remains on the core material, the core material does not affect the reference plane, allowing accurate positioning and dimensioning at all times. be able to.

[Brief explanation of the drawing]

Figure i11 is a plan view showing a punched state of a core material according to a conventional example, Figure 2A is an enlarged plan view iii showing a state of punched core material according to an embodiment of the present invention, and Figure 2B is a separate diagram. Fig. 1120 is an enlarged plan view similar to Fig. 2A according to an embodiment of the present invention;
Figure 3 is part 1 of the present invention! A schematic 111 side view showing the work Im for laminating and aligning the core materials according to the example, FIG. 4 is a schematic front view showing the same one piece to be bonded as above, and 5th WA is inserting the same core materials into the core holder. Schematic perspective view of acupuncture needles showing the state of
6m is the same as above; This is a vertical cross-sectional view of the A material inserted into the core holder. In the symbols used in the drawing, (8) -... ;A material (9)・・・・・・・・・・・・・・・Support part a
＃－－－－－－－－－・・・・・・Connection part aυ・
・・・・・・・・・・・・・・・・・・It is a recessed part. Agent Katsu II Ueya & Osamu Mura Figure 3 Figure 55! 1 Figure 4 ゛ to 611

Claims (1)

[Claims] A plurality of core materials are punched out from a ferromagnetic metal sheet with each of the core materials connected via a connecting portion to a support portion for supporting the plurality of core materials, and then the plurality of core materials are According to a method of manufacturing a magnetic head in which the head core is formed by laminating each other after cutting from the support part, recesses are formed in each of the above-mentioned materials, and each of the above-mentioned materials is formed in these recesses. ; a method characterized by punching out the plurality of core materials in a state in which the A material and the connecting portion are respectively connected to each other;