JPH04214211A - Production of ceramic parts for magnetic head - Google Patents

Abstract

PURPOSE:To produce the ceramic parts for magnetic heads having high accuracy at a high yield and good productivity by decreasing the man-hours for operations which are heretofore laborious and a many of which are needed in the process for producing the ceramic parts for the magnetic heads to be used for various electronic computers, etc. CONSTITUTION:A ceramic sintered body 12 which is previously worked to the shape of a secondary product and is calcined is used. A grinding wheel 15 for cutting and an H-shaped base which is disposed with a recessed part 14 in such a manner that this part parallels with the above-mentioned grinding wheel 15 for cutting are used. The cutting part of the ceramic sintered body 12 mentioned above is stuck into the recessed part 14 so as to intersect orthogonally with the grinding wheel 15 for cutting and thereafter, the ceramic sintered body 12 is cut by the grinding wheel 15 for cutting. The ceramic parts for the magnetic heads having the high accuracy are thus produce.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing ceramic parts essential for various magnetic heads such as floppy disk heads and hard disk heads, in which flatness and surface roughness are important.

0002

2. Description of the Related Art Conventionally, magnetic heads have been manufactured by bonding various ceramic components for magnetic heads with adhesive resin or bonding glass. Therefore, the bonding surfaces of various ceramic components for magnetic heads are required to have highly accurate flatness and surface roughness.

A conventional method of manufacturing ceramic components for magnetic heads will be explained below. 6 is a perspective view of a conventional ceramic component for a magnetic head such as a slider, and FIG. 7 is a manufacturing process diagram showing a conventional method of manufacturing a ceramic component for a magnetic head. 1 is a ceramic component for a magnetic head such as a slider made of calcium-based titania having a protrusion on the top; 2a, 2b, 2c, and 2d are bases; 3 is a rectangular ceramic material; 4 is a rotating ceramic component material 3 is a cutting whetstone for cutting, 5 is a grinding whetstone for grinding a flat surface and performing secondary processing, and 6 is a lapping whetstone for adjusting the surface roughness etc. of the final product shape and finishing it to a mirror finish.

[0004] The manufacturing method will be explained below according to process diagrams. After placing the rectangular ceramic material 3 on the base 2a and fixing it with adhesive etc., cut a predetermined number of materials with a cutting wheel 4 to take out the material (Step I). After fixing the material 3 to another base 2b and grinding its outer shape with a polishing machine (step II), it is fixed to another base 2c, and is shaped into a predetermined part, such as forming protrusions, using a rotary grindstone 5. After shape-grinding as shown (Step III), this was further transferred to another base 2d, pasted and fixed, sliced with a cutting wheel 4 (Step IV), and then mirror-finished by lapping (Step V). , which manufactured ceramic parts.

[0005]

[Problems to be Solved by the Invention] However, the conventional structure described above has the problem that the ceramic material is pasted and fixed to each base in each step, which makes the work complicated and the productivity extremely low.

In particular, ceramic parts for magnetic heads are several meters long.
Most of them are small (m-square), and since there are various shapes, the number of man-hours required for wrapping increases due to pasting, which reduces work efficiency. .

The present invention solves the above-mentioned conventional problems, and aims to provide a method for manufacturing ceramic parts for magnetic heads which is excellent in workability and has high productivity.

[0008]

[Means for Solving the Problems] In order to achieve this object, the method of manufacturing a ceramic component for a magnetic head of the present invention is as follows:
A ceramic sintered body that has been processed and fired into the shape of a secondary product is placed in the recess using a cutting whetstone and an H-shaped base arranged so that the cutting whetstone and the recess are parallel. The cutting part of the body is attached perpendicularly to a cutting whetstone, and then the ceramic sintered body is cut by the cutting whetstone.

[0009]

[Operation] With this configuration, when cutting ceramic materials,
Since the ceramic material is held on the side wall of the H-shaped base, deterioration of flatness due to whirling of the grinding wheel can be prevented, and ceramic parts for magnetic heads with good flatness and surface roughness can be manufactured without lapping. can do. Furthermore, since an H-shaped base is used, both sides of the base can be used, unnecessary bases can be eliminated, and work can be done with fewer bases.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a manufacturing process diagram of a ceramic component for a magnetic head according to the present invention, and FIG. 2 is a perspective view of an H-shaped base. In step I, a secondary product molded product 11 is made by molding ceramic powder raw materials such as calcium-based titania into a shape that can be made into multiple pieces as a final product of ceramic parts with protrusions etc. using a press, and in step II. , the molded product 11 is fired to produce a rod-shaped ceramic sintered body 12. Next, in step III, the ceramic sintered body 12 is placed on the H-shaped base 13.
The ceramic sintered body 12 is pasted across both side walls of the recess 14 so as to be perpendicular to the traveling direction of the cutting whetstone 15 without any gaps, and then the cutting whetstone 15 rotates while extruding the ceramic sintered body 12 to the thickness of the final product. The ceramic component 1 for a magnetic head is obtained by cutting.

Since the H-shaped base 13 has two recesses 14 on the upper and lower surfaces, each surface can be used as a base.
One H-type base can serve as two bases. Note that the recess 14 may have the same width on the upper and lower surfaces of the H-shaped base 13, but may be changed so that it can be used for manufacturing other ceramic parts. Further, instead of moving the cutting whetstone 15 as in this embodiment, the H-shaped base 13 may be moved toward the cutting whetstone 15.

(Comparative Example) The flat base 16 shown in FIG.
A ceramic component for a magnetic head was produced in the same manner as in Example except that Example 3 was used in place of Example 3. A process diagram is shown in Figure 4.

FIG. 5 shows a perspective view of a ceramic component for a magnetic head, such as a slider, manufactured by the manufacturing methods of the example and the comparative example. Regarding surface roughness, good results were obtained in both the manufacturing methods according to the present example and comparative example, but different results were obtained in flatness, that is, surface shape, which requires high precision of 1 μm or less. In the method of the comparative example using a flat plate base, the shape of the ceramic part obtained from the ceramic sintered body located farthest in the direction of movement of the grinding wheel is such that the wall thickness at one end is the design value, as shown by the shaded area 17. However, as shown by the solid line 18, the shape of the ceramic part obtained by the method of this example was obtained with the thickness as designed, and it was considered to be an unsuitable product. There was no.

[0015] In order to obtain high-precision ceramic parts with a flatness of 1 μm or less by cutting, it is necessary to suppress minute wobbling in the direction perpendicular to the rotational direction of the grinding wheel, and the flatness may deteriorate due to this grinding wheel wobbling. These results revealed that the H-type base of the present invention is extremely effective in preventing this.

In addition, in terms of work man-hours, compared to the conventional manufacturing method shown in FIG. 7, the manufacturing method of the present invention is 1/4 to 1/5 of the conventional manufacturing method due to a significant reduction in the number of man-hours for pasting and changing the base.
It was found that high-precision ceramic parts for magnetic heads can be manufactured with an extremely small number of man-hours.

[0017]

[Effects of the Invention] As described above, the present invention requires only an extremely small amount of work to be done, which involves holding a ceramic sintered body that has been pre-processed into a secondary product shape and firing it on an H-shaped base and cutting it into a predetermined thickness of the ceramic part. The present invention makes it possible to manufacture excellent ceramic parts for magnetic heads that can produce highly accurate ceramic parts for magnetic heads with high yield and high productivity in fewer man-hours.

[Brief explanation of the drawing]

[Fig. 1] Manufacturing process diagram of ceramic parts for magnetic heads of the present invention

[Fig. 2] Perspective view of the H-shaped base of the present invention

[Figure 3] Perspective view of a flat plate base of a comparative example

[Figure 4] Manufacturing process diagram of comparative example

[Fig. 5] Perspective view of ceramic parts for magnetic heads manufactured in this example and comparative example.

[Fig. 6] A perspective view of a conventional ceramic component for a magnetic head.

[Figure 7] Manufacturing process diagram of conventional ceramic parts for magnetic heads

[Explanation of symbols]

1 Ceramic parts for magnetic heads 2a, 2b, 2c, 2d base 3 Ceramic material 4 Cutting whetstone 5 Rotating whetstone 6　Wrapping board 11 Molded products 12 Ceramic sintered body 13 H type base 14 Recess 15 Cutting whetstone 16 Flat base

Claims (1)

[Claims] 1. A method of manufacturing a ceramic component for a magnetic head from a ceramic sintered body, the ceramic sintered body being previously processed into a secondary product shape and fired, using a cutting whetstone, and the cutting whetstone and a recessed part Using an H-shaped base arranged parallel to each other, the cutting part of the ceramic sintered body is stuck to the recessed part perpendicularly to the cutting wheel, and then the ceramic sintered body is cut with the cutting wheel. A method of manufacturing a ceramic component for a magnetic head, characterized in that: