JPS6249648B2 - - Google Patents
Info
- Publication number
- JPS6249648B2 JPS6249648B2 JP52146826A JP14682677A JPS6249648B2 JP S6249648 B2 JPS6249648 B2 JP S6249648B2 JP 52146826 A JP52146826 A JP 52146826A JP 14682677 A JP14682677 A JP 14682677A JP S6249648 B2 JPS6249648 B2 JP S6249648B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- back core
- head
- composite
- side plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002131 composite material Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 229910000889 permalloy Inorganic materials 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910000702 sendust Inorganic materials 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
この発明は、センダストなどの耐摩耗材で作ら
れたヘツドチツプと、パーマロイなどの透磁率の
高い材料で積層して作られたバツクコアとを接合
して構成する磁気ヘツド用複合コアの製造方法に
関するもので、その目的とするところは、ヘツド
チツプとバツクコアとの接合強度の向上と、接合
ずれの防止、および磁気特性の向上などをはかる
ことにある。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a composite head for magnetic heads which is constructed by joining a head chip made of a wear-resistant material such as sendust and a back core made of a laminated layer of a material with high magnetic permeability such as permalloy. This relates to a method for manufacturing a core, and its purpose is to improve the bonding strength between the head chip and the back core, prevent bonding displacement, and improve magnetic properties.
従来のこの種の磁気ヘツド用複合コア（以下単
に「複合コア」とも記載する）の製造方法は、第
１図に示すように、あらかじめパーマロイなどの
透磁率の高い材料でバツクコア形状に形成した金
属片ａ（複合型コアの数10個分）を多数枚積層し
て図のように配置し、さらに、このバツクコアと
なる多数枚の金属片ａの一端に、センダストなど
の耐摩耗材で作られたヘツドチツプとなるチツプ
材ｂを接合部ｃで接合し、その後、所要のコア幅
Ｗになるように切断し、第２図に示すような先端
にヘツドチツプb′を有し、後方にバツクコアa′を
有する、いわゆる複合コアを得るようにしていた
ものである。 The conventional manufacturing method for this type of composite core for magnetic heads (hereinafter also simply referred to as "composite core") is as shown in Figure 1, in which a metal core is formed in advance into a back core shape using a material with high magnetic permeability such as permalloy. A large number of pieces A (equivalent to 10 composite cores) are stacked and arranged as shown in the figure, and a layer made of a wear-resistant material such as Sendust is attached to one end of the many metal pieces A that will become the back core. Chip material b, which will become the head chip, is joined at the joint c, and then cut to the required core width W, with a head chip b' at the tip and a back core a' at the rear, as shown in Figure 2. The aim was to obtain a so-called composite core with
しかし、このような製造方法によると、上記の
所要コア幅Ｗに切断する際に機械的歪などによ
り、バツクコアa′の両側面の磁気特性の劣化を来
たし、バツクコアa′の切削性が悪いため、所要コ
ア幅Ｗのバラツキが大きい欠点があり、さらに、
単にバツクコアa′にヘツドチツプb′を接合したの
みであるから接合強度も弱いなどの欠点があつ
た。 However, according to this manufacturing method, the magnetic properties of both sides of the back core a' deteriorate due to mechanical strain when cutting to the above-mentioned required core width W, and the machinability of the back core a' is poor. , there is a drawback that the required core width W varies widely, and furthermore,
Since the head chip b' was simply joined to the back core a', there were drawbacks such as weak joint strength.
この発明になる複合コアの製造方法は、以上の
従来の諸欠点を全て除去したものであり、以下、
第３図〜第６図に示す実施例により説明する。 The method for manufacturing a composite core according to the present invention eliminates all of the above-mentioned conventional drawbacks, and is as follows:
This will be explained using the embodiments shown in FIGS. 3 to 6.
第３図に示すように、まず、バツクコアとなる
べきものとして、パーマロイなどの薄い金属板を
プレスなどによつて打抜いて複数個の互いに連結
したバツクコア部２を形成した金属板を図示のよ
うな所要のコア幅Ｗの厚さに積層した積層金属板
１を用意する。 As shown in Fig. 3, first, as a back core, a thin metal plate such as permalloy is punched out using a press or the like to form a plurality of interconnected back core parts 2, as shown in the figure. A laminated metal plate 1 is prepared, which is laminated to a thickness of a required core width W.
ここで、３，３′は上記打抜きの際に残される
連結部で、これにより、バツクコア部２間や積層
金属板１との連結を保つようにしてある。４はバ
ツクコア部２の端部、すなわち、後述のヘツドチ
ツプなどとの接合部であり、この接合部は上記打
抜きの際に複数個のバツクコア部毎に独立して形
成される。 Here, reference numerals 3 and 3' denote connecting portions left during the punching process, which maintain the connection between the back core portions 2 and the laminated metal plate 1. Reference numeral 4 denotes an end portion of the back core portion 2, that is, a joint portion with a head chip, which will be described later, and this joint portion is formed independently for each of a plurality of back core portions during the punching process.
次に、同図に示されているように、センダスト
などの耐摩耗材で作られた棒状のヘツドチツプ材
５および非磁性導電体で作られた板状のいわゆる
サイドプレート６を用意し、このヘツドチツプ材
５を、第４図に示すように、バツクコア部２の接
合部４の端面に接合し、かつ、上記サイドプレー
ト６をバツクコア部２とヘツドチツプ材５とを連
継するよう側面に介在させると共に該バツクコア
部とヘツドチツプとの接合面に対して略垂直に接
合する。 Next, as shown in the figure, a rod-shaped head tip material 5 made of a wear-resistant material such as sendust and a plate-shaped so-called side plate 6 made of a non-magnetic conductor are prepared, and this head tip material is 5 is joined to the end face of the joint part 4 of the back core part 2, and the side plate 6 is interposed on the side surface so as to connect the back core part 2 and the head tip material 5 continuously, as shown in FIG. The back core portion and the head chip are bonded approximately perpendicularly to the bonding surface.
このように組合わされた後に、次に第５図に示
すような最後の複合コアを得るため、第４図に示
すコア寸法ｌに切断し、かつ、前記の連結部３，
３′をも同時に切断除去して、複数個（図では３
個）の複合コアを得るようにしたものである。 After being assembled in this way, in order to obtain the final composite core as shown in FIG. 5, the core is cut to the core dimension l shown in FIG. 4, and the connecting portion 3,
3' is also cut and removed at the same time, resulting in multiple pieces (3 in the figure).
) composite cores are obtained.
ここで接合面積等を比較してみるに、従来の製
造方法により作られた複合コアにおけるヘツドチ
ツプ材b′とバツクコア部a′の接合部ｃの面積Ｓc
は第２図から明らかなように、Ｓc＝Ｗ×ｈであ
る。一方、本発明の製造方法により作られた複合
コアにおけるヘツドチツプ材５とバツクコア部２
との接合面積は、このＳcの他に、第５図からも
明らかなようにサイドプレート６の面積S6も加算
される。この面積S6（〓ｌ×ｙ）はＳcの約２倍
に形成されるので、結局トータルの接合面積は、
従来製法による複合コアの接合面積Ｓcの約３倍
となる。また、サイドプレート６の厚さ及び硬度
を勘案すると、接合面積の増加により、第２図及
び第５図の矢印Ａ又は矢印Ｂ方向からの加圧に対
する接合強度は、従来に比べて約2.5倍以上とな
つた。 Comparing the joint areas etc. here, we find that the area of the joint c between the head tip material b' and the back core part a' in the composite core made by the conventional manufacturing method is S c
As is clear from FIG. 2, S c =W×h. On the other hand, the head tip material 5 and the back core portion 2 in the composite core made by the manufacturing method of the present invention
In addition to this S c , the area S 6 of the side plate 6 is also added to the area of contact with the side plate 6 , as is clear from FIG. This area S 6 (〓l×y) is approximately twice as large as S c , so the total bonding area is
This is approximately three times the bonding area S c of the composite core produced by the conventional manufacturing method. Furthermore, considering the thickness and hardness of the side plate 6, due to the increased bonding area, the bonding strength against pressure applied from the direction of arrow A or arrow B in FIGS. 2 and 5 is approximately 2.5 times that of the conventional method. That's all.
第６図は、この複合コアを用いて組立てた磁気
ヘツドの外観図である。 FIG. 6 is an external view of a magnetic head assembled using this composite core.
この発明になる磁気ヘツド用複合コアの製造方
法は、以上説明したような製造方法内容なので、
従来方法のような前述のバツクコア部の切断を要
しないため、バツクコア両側面の磁気特性の劣化
を来たすこともなく、磁気特性の向上がはかれ、
また、ヘツドチツプはサイドプレートを介してバ
ツクコアに接合しているため、ヘツドチツプを第
５図に示すような形状及び大きさに形成すると従
来のものに比して接合面積が約３倍となり、従つ
て、接合強度が約2.5倍向上することになり、さ
らに、ヘツドチツプはサイドプレートを介して接
合しているため、このサイドプレートが基準板の
役目を果すので、ヘツドチツプとバツクコアとの
トラツク幅方向の接合ずれがなくなり、しかも、
複数コア分の同時接着（ヘツドチツプ材やサイド
プレートとバツクコア部との接着）が行なえ、生
産性が向上する等の種々の特長がある。 The manufacturing method of the composite core for a magnetic head according to the present invention is as described above.
Since it is not necessary to cut the back core part as described above as in the conventional method, the magnetic properties of both sides of the back core are not deteriorated, and the magnetic properties are improved.
Furthermore, since the head chip is connected to the back core via the side plate, if the head chip is formed into the shape and size shown in Fig. 5, the joint area will be approximately three times that of the conventional one. , the joint strength will be improved by about 2.5 times.Furthermore, since the head chips are joined through the side plates, this side plate will serve as a reference plate, so the joint strength in the track width direction between the head chips and the back core will be improved. There is no misalignment, and
It has various features such as simultaneous bonding of multiple cores (bonding of head tip material, side plate, and back core portion), which improves productivity.
第１図は従来の複合コアの製造方法を説明する
ための切断前の複合コア部の斜視図、第２図はそ
の切断後の複合コアの斜視図、第３図はこの発明
になる複合コアの製造方法を説明するための主要
構成部を表わす斜視図、第４図はその製造工程の
途中の状態を示す斜視図、第５図はこの発明によ
つて得た複合コアの斜視図、第６図はその複合コ
アを用いて作られた磁気ヘツドの斜視図である。
１…積層金属板、２…バツクコア部、３，３′
…連結部、４…接合部、５…ヘツドチツプ材、６
…サイドプレート、Ｗ…コア幅、ｌ…コア寸法。
FIG. 1 is a perspective view of a composite core before cutting to explain a conventional method for manufacturing a composite core, FIG. 2 is a perspective view of the composite core after cutting, and FIG. 3 is a composite core according to the present invention. FIG. 4 is a perspective view showing the main components for explaining the manufacturing method of the same. FIG. 4 is a perspective view showing a state in the middle of the manufacturing process. FIG. FIG. 6 is a perspective view of a magnetic head made using the composite core. 1... Laminated metal plate, 2... Back core part, 3, 3'
...Connection part, 4...Joint part, 5...Head tip material, 6
...side plate, W...core width, l...core dimension.
Claims (1)
チツプと、パーマロイなどの透磁率の高い材料で
積層して作られたバツクコアとを接合して構成さ
れる磁気ヘツド用複合コアにおいて、上記バツク
コアとなるべきパーマロイなどの薄い金属板をプ
レスなどにより打抜いてバツクコア部が複数個連
結するように形成した積層金属板を所要のコア幅
の厚さに積層し、その後上記ヘツドチツプをバツ
クコア部の接合部の端面に接合し、かつ非磁性導
電体よりなるサイドプレートを該バツクコア部と
ヘツドチツプとを連継するよう側面に介在させる
と共に該バツクコア部とヘツドチツプとの接合面
に対して略垂直に接合した後、これらヘツドチツ
プおよびサイドプレートと共に上記の連結した複
数個のバツクコア部を切断して切り離して複合コ
アを得ることを特徴とする磁気ヘツド用複合コア
の製造方法。1. In a composite core for a magnetic head that is constructed by joining a head chip made of a wear-resistant material such as sendust and a back core made of a laminated layer of a material with high magnetic permeability such as permalloy, the permalloy that is to be the back core is The laminated metal plates are formed by punching out thin metal plates such as by a press or the like so that multiple back core parts are connected, and are laminated to a thickness of the required core width, and then the head chips are attached to the end faces of the joints of the back core parts. A side plate made of a non-magnetic conductive material is interposed on the side surface so as to connect the back core part and the head chip, and the back core part and the head chip are joined substantially perpendicularly to the joint surface. and a method for manufacturing a composite core for a magnetic head, which comprises cutting and separating the plurality of connected back core parts together with the side plate to obtain a composite core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14682677A JPS5479610A (en) | 1977-12-07 | 1977-12-07 | Production of composite type magnetic head core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14682677A JPS5479610A (en) | 1977-12-07 | 1977-12-07 | Production of composite type magnetic head core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5479610A JPS5479610A (en) | 1979-06-25 |
| JPS6249648B2 true JPS6249648B2 (en) | 1987-10-20 |
Family
ID=15416391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14682677A Granted JPS5479610A (en) | 1977-12-07 | 1977-12-07 | Production of composite type magnetic head core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5479610A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5968812A (en) * | 1982-10-08 | 1984-04-18 | Alps Electric Co Ltd | Manufacture of magnetic head core |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023614A (en) * | 1973-07-02 | 1975-03-13 | ||
| JPS52138914A (en) * | 1976-05-14 | 1977-11-19 | Matsushita Electric Ind Co Ltd | Production of magnetic head |
-
1977
- 1977-12-07 JP JP14682677A patent/JPS5479610A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023614A (en) * | 1973-07-02 | 1975-03-13 | ||
| JPS52138914A (en) * | 1976-05-14 | 1977-11-19 | Matsushita Electric Ind Co Ltd | Production of magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5479610A (en) | 1979-06-25 |
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