JPH0866856A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE: To provide a method for manufacturing magnetic heads, in which a minimum of one equipment stand is required to match the number of products and the number of spare grinding wheels or flanges in stock can be reduced. CONSTITUTION: A method for manufacturing a magnetic head comprises a step for setting the magnetic head in a first position P1 by mounting the magnetic head on a mounting means 40; a step for subjecting time first part 54 of the magnetic head set in the first position P1 to first machining; a step for setting the magnetic head in a second position P2 by inverting the mounting means 40; and a step for subjecting the second part 56 of the magnetic head set in the second position P2 to second machining.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method of manufacturing a magnetic head.

[0002]

2. Description of the Related Art Conventionally, a magnetic head, in particular, a chip of the magnetic head is manufactured by the procedure shown in FIG. A chip 1 of a magnetic head, which is a work, is attached to a jig 2 of equipment. In the chip 1, first, the guide groove 4 is processed by the grindstone 3. Next, the chip 1 is detached from the jig 2 and attached to a jig 12 of another facility, and the chip 1 has a cross section L
The V-shaped recess 5 is processed by another grindstone 6.

Further, the chip 1 is removed from the jig 12 and replaced with a jig 22 of another equipment, and a chamfered portion 7 having an angle of, for example, 37.5 degrees is provided at a corner portion of the surface opposite to the chip 1. It is processed by the whetstone 8. Finally, it is removed from the jig 22 and replaced with a jig 32 of another equipment, and another grindstone 9
The guide groove 10 is processed by using. In this way, the conventional magnetic head has four types of equipment and many grindstones 3, 6, 8, 9
Is used to process the guide grooves 4 and 10 and the recess 5 and the chamfer 7.

[0004]

As described above, in the conventional four steps shown in FIG. 7, it is necessary to replace the chip of the magnetic head, which is a work, with a different jig for each step. Then, one jig equipment is required for each process. Therefore, four units are required for a total of four processes. Moreover, the number of sets of grindstones needs to be 2 to 3 in each process.

Therefore, it is necessary to prepare a grindstone, a flange for mounting the grindstone on a rotary shaft of a machine, a spare of the grindstone and the flange, and to prepare equipment for each process. For example, even if there is a decrease in the number of heads produced, the conventional technique requires at least one unit for each process, and a minimum of four units.

Therefore, the present invention has been made to solve the above-mentioned problems, and requires at least one equipment base according to the number of products to be produced, and yet can reduce the stock of spare grindstones and flanges. An object is to provide a method for manufacturing a head.

[0007]

According to the present invention, the above object is to attach a magnetic head to an attaching means to position the magnetic head in a first state, and to position the magnetic head in the first state. A step of subjecting the first part of the head to the first machining;
And a step of subjecting the second portion of the magnetic head positioned in the second state to the second processing, which is achieved by the method for manufacturing a magnetic head. In the present invention, preferably, the first processing includes groove processing and recess processing on the magnetic head. In the present invention, preferably, the second processing includes chamfering processing and groove processing on the magnetic head.
In the present invention, preferably, the mounting means rotates from the first state to the second state by an angle of 180 degrees. In the present invention, preferably, the groove processing on the magnetic head and the recess processing on the magnetic head are performed by the same tool. In the present invention, the chamfering process on the magnetic head and the groove process on the magnetic head are preferably performed by the same tool.

[0008]

According to the above construction, the magnetic head is mounted on the mounting means and positioned in the first state. For the first portion of the magnetic head positioned in the first state,
First processing is performed. Next, the mounting means is inverted and the second
Position in the state of. The second processing is performed on the second portion of the magnetic head positioned in the second state. As a result, the work of replacing the magnetic head each time it is processed is unnecessary, and a plurality of types of processing can be performed on the magnetic head with one piece of equipment.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The examples described below are
Since it is a preferred specific example of the present invention, various technically preferable limitations are attached, but the scope of the present invention is, unless otherwise stated to limit the present invention, in the following description.
It is not limited to these modes.

FIG. 1 shows a preferred embodiment of a magnetic head manufacturing apparatus for realizing the magnetic head manufacturing method of the present invention. Two grindstones 3 are attached to the tool mounting portion 30.
2, 34 are set to be removable. This tool mounting portion 30 is driven by a driving force (not shown) to drive the grindstone 3
2, 34 can be rotated.

A chip mounting means 40 of the magnetic head is arranged corresponding to the tool mounting portion 30. The magnetic head chip mounting means 40 includes a reversal drive unit 42.
By the driving of, the first state P1 indicated by the alternate long and short dash line can be inverted 180 degrees in the arrow R direction from the second state P2 indicated by the solid line. In addition, the chip mounting means 40 of the magnetic head in the second state P2 is
The first state P1 can be reversed in the direction opposite to the arrow R.

The tip mounting means 40 of the magnetic head is
A presser 44 is provided so that the chip 50 of the magnetic head can be detachably held. First
In state P1, the one side surface 54 of the chip 50 of the magnetic head faces the grindstone 32 used for the first processing. On the other hand, the second state P2
The side 50 of the tip 50 of the magnetic head positioned on the side faces the grindstone 34 used for the second processing.

Next, a method of manufacturing the magnetic head chip manufacturing apparatus of FIG. 1 will be described. Magnetic head chip 50
Is firmly fixed and positioned with respect to the chip mounting means 40 of the magnetic head by the presser 44 of the mounting means 40. As a result, the chip 50 of the magnetic head is
Is positioned in the state P1. And the tool attachment part 3
While rotating 0, the tool mounting portion 30 is moved to the tip mounting means 40 side of the magnetic head to the specified position in the arrow Z direction. Then, the tip attaching means 40 moves in the direction of the arrow X, and the grindstone 32 forms the guide groove 60 on the one side surface 54 of the tip 50 of the magnetic head. The grindstone 32 is one side surface 5 of the chip 50 of the magnetic head.
The guide groove 60 is formed for the groove 4. This guide groove 60
There is a step of winding a wire rod around the chip 50 in a later step for manufacturing the head, but it is a groove for preventing the wire rod from being displaced from the guide of the winding position.

Next, the position of the grindstone 32 is moved relative to the magnetic head in the Y direction, and the same grindstone 32 is used to form an L on another side surface 54 of the chip 50 of the magnetic head. A recess 62 having an L-shaped cross section, which is a V-shaped cut portion, is formed. In this way, the guide groove 60 and the recess 6 having an L-shaped cross section are provided.
Each processing of No. 2 is called the first processing. This first process is shown in more detail in FIG. The processing cut width of the guide groove 60 corresponds to the thickness L of the grindstone 32.
One side 54 of the magnetic head chip 50 is the first portion of the magnetic head.

As described above, the first processing includes a step of processing the guide groove 60 and the recess 62 having an L-shaped cross section on one side surface 54 of the chip 50 of the magnetic head. When the tape is run on the surface of the chip 50, magnetic powder is generated from the tape. Therefore, by forming the L-shaped concave portion 62, the magnetic powder is dropped into the concave portion 62 so as not to adhere to the surface of the chip 50.

Next, the tool mounting portion 30 shown in FIG.
After being separated in the direction opposite to the direction, the reversing drive unit 42 of FIG. 1 is driven to reverse the chip mounting means 40 of the magnetic head from the first state P1 to the second state P2 in the direction of arrow R by 180 degrees. This causes the chip 50 of the magnetic head to move to the second
Positioning is performed in the state P2.

The other side surface 56 of the chip 50 of the magnetic head.
Is subjected to the second processing. This second processing is shown in FIG.
As shown in FIG. 3, the process includes forming the chamfered portion 70 at an angle of, for example, 37.5 degrees and the process of forming the guide groove 72 with the grindstone 34. That is, the tool mounting portion 30 is moved to the tip mounting means 40 side of the magnetic head along the arrow Z direction, and the chamfered portion 70 of 37.5 degrees is formed by the grindstone 34 (shown by a broken line). After that, the tool attaching portion 30 retreats in the direction opposite to the arrow Z direction, the tool attaching portion 30 then moves in the arrow Y direction (leftward direction), and the tool attaching portion 30 again moves along the arrow Z direction to move the magnetic head. It moves with respect to the tip mounting means 40. Thereby, the guide groove 72 is processed on the other side surface 56. After that, the tool attachment part 30 is retracted again in the direction opposite to the arrow Z direction. This second processing is performed by the chamfered portion 70 as shown in FIGS. 1 and 3.
And the processing of the guide groove 72. The chamfered portion 70 and the guide groove 72 are processed by the same grindstone 34. The guide groove 72 has a step of winding a wire rod around the chip 50 in a later step for manufacturing the head, but is a groove for preventing the wire rod from being displaced from the guide at the winding position. The chamfered portion 70 is a chamfered portion for preventing the tape from being scratched by the chip edge on the tape-in side when the tape is run on the chip surface.

Incidentally, the grindstone 34 used for this second processing
4 has a shape having an inclined surface portion 34a for processing the chamfered portion 70 and a surface 34b for processing the guide groove 72 as shown in FIG. By the way, control for moving the tool mounting portion 30 in the arrow Z direction and the opposite direction, and in the arrow Y direction, that is, setting and changing of the machining position for the chip 50 of the magnetic head is not shown in the figure.
It can be set by the program of the C device.

FIG. 5 compares the conventional example with the example of the present invention regarding the process capability index (CP value). The process capability index is the process capability (the capability related to the quality of the process). When the process is standardized sufficiently, the cause of abnormality is removed, and the process is maintained in a stable state, how much quality is This is a method for grasping whether or not it is realized.), And is used to quantify the degree of process capability and judge the presence or absence of process capability. According to FIG. 5, the manufacturing method of the present invention is remarkably improved and the process capability index is improved about twice as much as the conventional method.

FIG. 6 compares an example of the present invention with an example of the prior art regarding the processing man-hours. The processing man-hour shown in FIG.
For example, when 20 blocks (which are magnetic head chips) are processed in a processing time of 20 minutes, the processing time for each block is 20 minutes / 20, which is 1 minute / 1.
It is a book. In the comparison of FIG. 6, the processing man-hours by the manufacturing method of the present invention are about 1/3 smaller than the processing man-hours by the conventional method.

In the above-described embodiment, the equipment required for forming the guide groove, the L-shaped recessed section, the chamfered portion and the other guide groove is provided by preparing at least one manufacturing apparatus shown in FIG. I'm done. On the other hand, conventionally, at least four units are required to realize the four steps. Therefore, the number of man-hours for setting and resetting the magnetic head chip (four times) required in each of the four steps can be completed only once in the embodiment of the present invention.

The stock of the preliminary grindstones and flanges, which used to require 8 to 12 sets in the past, can be reduced to about 2 sets in the embodiment of the present invention. By the way, the present invention is not limited to the above embodiments. Figure 1
The two grindstones are set for the tool attachment means, but the number of grindstones is not limited to this, and three or more grindstones may be set as necessary to process the necessary processing on the chip 50 of the magnetic head. . As a magnetic head, for example, 8 mm
It can be applied to a video head and a VHS head.

[0023]

As described above, according to the present invention, a minimum of one equipment stand is required according to the number of products produced, and the stock of spare grindstones and flanges can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a manufacturing apparatus used in a method for manufacturing a magnetic head of the present invention.

FIG. 2 is a diagram showing a first processing in the manufacturing method of the present invention.

FIG. 3 is a diagram showing a second processing in the method of manufacturing the magnetic head of the present invention.

FIG. 4 is a view showing the shape of a grindstone used for the second processing.

FIG. 5 is a diagram showing a comparison of process capability indexes (CP values) in an example of the present invention and a conventional example.

FIG. 6 is a diagram showing a comparison of processing man-hours in an example of the present invention and a conventional example.

FIG. 7 is a diagram showing a conventional processing method.

[Explanation of symbols]

 30 Tool Mounting Part 32 Grinding Stone Used for First Machining 34 Grinding Stone Used for Second Machining 40 Magnetic Head Chip Attachment Means 50 Magnetic Head Chip 54 One Side (First Part) 56 The Other Side surface (second portion) 60 Guide groove 62 L-shaped recessed section 70 Chamfered portion 72 Guide groove P1 First state P2 Second state

Claims (6)

[Claims] 1. A step of mounting a magnetic head on a mounting means to position the magnetic head in a first state; and a step of performing a first process on a first portion of the magnetic head positioned in the first state. , Inverting the mounting means to position it in a second state, and subjecting the second portion of the magnetic head positioned in the second state to a second process. A method for manufacturing a characteristic magnetic head. 2. The method of manufacturing a magnetic head according to claim 1, wherein the first processing includes groove processing and recess processing on the magnetic head. 3. The method of manufacturing a magnetic head according to claim 1, wherein the second processing includes chamfering processing and groove processing on the magnetic head. 4. The method of manufacturing a magnetic head according to claim 1, wherein the mounting means rotates from the first state to the second state by an angle of 180 degrees. 5. The method for manufacturing a magnetic head according to claim 2, wherein the groove processing on the magnetic head and the recess processing on the magnetic head are performed by the same tool. 6. The method of manufacturing a magnetic head according to claim 3, wherein the chamfering process on the magnetic head and the groove process on the magnetic head are performed by the same tool.