JPH03224209A - Manufacture of case for compound magnetic head - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of the title case in satisfactory precision.dimension by a method wherein a butting surface making a gap is provided on one surface of a rectangular cylindrical case member in the shape.dimension capable of inserting multiple magnetic heads while the butting surface is junctioned by an electrical means meeting the head containing requirements. CONSTITUTION:An almost rectangular cylindrical case member B1 in the shape.dimension capable of inserting multiple magnetic heads having a butting surface 5 making a gap on one surface 4 out of peripheral surfaces comprising pipe material, plate type material, etc., is manufactured and then the butting surface 5 is closed by arc-welding, resistance heat welding process, etc., to manufacture a case C1 in the shape.dimension meeting the head containing requirements. Through these procedures, a raw material in the commercial standard.dimension can be used to facilitate the manufacture of the case C1 capable of satisfactorily coping with the modified specification, model change, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a case for a composite magnetic head.

[Prior art] As a magnetic head for magnetic recording and reproduction,
In many cases, a composite magnetic head is used, which is a combination of multiple magnetic heads with different characteristics.

FIG. 5 is a perspective view showing a conventional composite magnetic head. Magnetic heads 1 and 2 having different characteristics are housed in a substantially rectangular cylindrical composite magnetic head case 3 (hereinafter referred to as case) and integrated to form a composite magnetic head a.

The case 3 was manufactured by a method in which a cylindrical metal pipe material or the like was formed into a required square shape, and then cut into required dimensions and subjected to finishing processing.

[Problem to be solved by the invention]

However, in the above-mentioned conventional manufacturing method of case 3, the cylindrical metal pipe material is made into the required substantially rectangular shape, which corresponds to the strict positional relationship required for multiple magnetic heads and the fitting conditions between the magnetic heads and the case. It is not easy to form the shape and dimensions to the required precision by drawing, etc., and requires advanced processing technology and product management.In addition, it is necessary to change the preparation of jigs and tools in order to respond to specification changes and model changes. It requires a lot of numbers and costs. Additionally, it requires metal vibrator materials with special dimensions that are not commercially available, which poses the problem of making it a costly product.

This invention solves the above-mentioned problems of the prior art, and makes it possible to easily manufacture a case that can assemble and manufacture a composite magnetic head with the necessary precision, and also allows for easy specification changes and model changes. It is an object of the present invention to provide a method for manufacturing a case for a composite magnetic head that is compatible with the present invention.

-1] For this reason, the method for manufacturing a composite magnetic head case according to the present invention has a shape that has an abutting portion with a gap on one surface and into which a plurality of magnetic heads can be inserted.・After forming a case member for a composite magnetic head having a substantially rectangular cylindrical size, the gap between the abutting portions is joined by electrical means to form the shape and dimensions necessary for accommodating the plurality of magnetic heads. It is an object of the present invention to achieve the above object by a manufacturing method characterized in that it is formed.

Furthermore, the above object is achieved by a manufacturing method characterized in that the range where the gap between the abutting parts is joined by electrical means is a part of the abutting parts.

[For production]

With the above configuration, the case member for a composite magnetic head (hereinafter referred to as the case member) is a substantially rectangular cylinder with a shape and size that allows multiple magnetic heads to be inserted, and has an abutment part with a gap on one surface. It can be easily formed by selecting from commercially available materials with standard dimensions.

Then, by making the case member meet the conditions for accommodating a predetermined plurality of magnetic heads and joining the gap between the abutting portions by electrical means, a case with sufficient shape and dimensional accuracy can be easily manufactured. can be formed into

Furthermore, when the area where the gap between the abutting parts is electrically joined is a part of the abutting part, the joining work becomes simple and the work can be further streamlined. Also, there is less heat influence on the case during work.

(Example) The case for a composite magnetic head according to the present invention (hereinafter referred to as
The manufacturing method of the case will be explained using examples.

FIG. 1 is a perspective view showing a case member in the process of being manufactured according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a composite magnetic head using a case manufactured according to the same embodiment.

First, from a vibrator material, a plate-like material, or a molded material, an abutment part 5 with a gap is formed on one surface 4 of the surrounding surfaces by 1T, and the abutment part 5 has a shape and dimensions into which a plurality of predetermined magnetic heads can be inserted. The case member Bl is formed by processing into a rectangular cylinder shape.

Next, by selecting electrical means such as various types of arc welding and various types of resistance heat welding, the butt portions 5 of the case member B1 are joined, and the case member B1 is brought under the conditions for accommodating the plurality of magnetic heads. Case CI is processed to match the shape and dimensions
Form and manufacture.

In addition, in the composite magnetic head A shown in FIG. 2 in which a predetermined plurality of magnetic heads 1.2 are inserted into the case C1 manufactured according to this embodiment, the reference numeral 6 shown on one side of the case CI indicates the mating portion 5. This is the joint part where the two are joined.

According to the manufacturing method of the embodiment described above, materials can be selected from commercially available standard size materials and can be easily processed. In addition, the case C1 can be easily manufactured with shape and dimensional accuracy that allows assembly and manufacture of a composite magnetic head with the required accuracy, and it is also possible to easily respond to specification changes and model changes.

(Other Embodiments) In the above embodiments, the joint portion 6 extends over the entire length of the abutting portion 5, but the range where the gap between the abutting portions 5 is electrically joined is only a part of the abutting portion 5. A common example is the joining portion 6, as shown in FIG.
is a portion of the approximately central portion of the abutting portion 5.

Further, as shown in FIG. 4, the joining portions 6 may be provided at a plurality of locations in the abutting portion 5, and the remaining abutting portions 5 may be formed into window-like openings 7.

In this way, when the area to be joined is a part of the abutting portion 5, in addition to the effect described in Ir1f, the joining work can be further simplified and the work can be streamlined. And the heat effect on the case during work can be further reduced.

(Effects of the Invention) As described above, according to the present invention, first, a case member for a composite magnetic head is formed which has an abutment portion with a gap on one surface, so that a plurality of magnetic heads can be inserted. It is easy to process into a substantially rectangular cylinder shape and size, and there are fewer restrictions on material dimensions.

Then, by electrically joining the gap between these abutting parts, it is possible to easily create a case for a composite magnetic head that has the shape and dimensional granularity needed to assemble and manufacture a composite magnetic head with the required stacking capacity. Since it can be formed easily, it has the effect of streamlining work, reducing manufacturing costs, and improving quality.

In addition, it can easily accommodate changes in specifications and model changes.

Furthermore, when the area to be joined is a part of the abutting portion, in addition to the above-mentioned effects, the joining operation becomes much simpler and the work can be further streamlined. And the heat effect during work can be further reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a case member in the process of being manufactured according to an embodiment of the present invention, FIG. 2 is a perspective view showing a composite magnetic head using a case manufactured according to the same embodiment, and FIG.
4 and 4 are case members according to other embodiments, and FIG. 5 is a perspective view showing a conventional composite magnetic head. a, A is a composite magnetic head, B1 is a case member, C1,
C2 and C3 are composite magnetic head cases according to embodiments;
1.2 is a magnetic head, 3 is a case for a conventional composite magnetic head, 4 is one surface, 5 is a butt portion, and 6 is a joint portion.

Claims (2)

[Claims] (1) After forming a substantially rectangular cylindrical case member for a composite magnetic head with a shape and size that allows insertion of a plurality of magnetic heads, having an abutting part with a gap on one surface, the abutting part with a gap is formed. A method of manufacturing a case for a composite magnetic head, characterized in that the gap is joined by electrical means to form the case into a shape and size necessary to accommodate the plurality of magnetic heads. (2) The method of manufacturing a case for a composite magnetic head according to claim 1, wherein the area where the gap between the abutting portions is joined by electrical means is a part of the abutting portions.