JPH02199614A - Production of core slider of magnetic head - Google Patents

Abstract

PURPOSE:To make mass production of core sliders having uniform quality by polishing the core sliders by means of a polishing tape which is held pressed by a predetermined pressure via a cushion material. CONSTITUTION:The plural core sliders 4 are disposed at determined intervals on a working table 7 and while the table 7 is oscillated and moved, the polishing tape 3 kept pressed by the predetermined pressure via the cushion material 6 is pressed to the core sliders 4, by which the core sliders are polished and the peripheral ends of the core sliders 4 are chamfered. Namely, the chamfering to the ideal edge curvature of the sliders is possible by adequately selecting the spring constant of the cushion material 6, the tension and lap pressure of the polishing tape 3 and the distance up to the adjacent core slider rails; in addition, the simultaneous working of the many core sliders is possible. The core sliders having the uniform quality are mass-produced in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a core slider of a magnetic head used in a magnetic disk device, etc., and particularly relates to a method for manufacturing a core slider of a magnetic head used in a magnetic disk device, etc. The present invention relates to a core slider manufacturing method suitable for micro-chamfering (hereinafter referred to as a chamfer) the air inflow/outflow ends.

[Conventional technology]

As a conventional method for manufacturing a core slider of a magnetic head, for example, the method disclosed in Japanese Patent Application Laid-Open No. 197359/1983 is known. According to the above publication, in the core slider shown in FIG. 4, first the rail 1a of the core slider is chamfered, then the inner rail 1b of the core slider is chamfered, and then the air inflow/outflow end 1c is chamfered. Was. These chamfer processes are shown in FIGS. 5(a) and (b).

As shown in (c), using jigs for outer rail carving guide 2a, inner rail carving guide 2b, and air inlet/outlet end carving guide 2c, polishing is performed between these jigs 2a, 2b, 2c and the core slider. This was done with tape 3 interposed.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the outer dimensions of the core slider are several millimeters square, and it is necessary to attach the core slider to a holding jig, and it is necessary to process each core slider individually. Therefore, there was a problem in that it required a lot of effort and time, and productivity was poor.

Furthermore, in the above-mentioned conventional technology, each core slider is attached to a holding jig and processed, so there is a problem that chamfer processing becomes uneven due to difficulty in adjusting the positional relationship. In particular, if the chamfer is excessively removed (the chamfer is large), there is a problem in that it adversely affects the flying characteristics of the magnetic head.

The present invention has been made in view of the problems of the prior art described above, and makes it possible to mass produce a core slider of uniform quality that makes the flying characteristics of the magnetic head suitable. An object of the present invention is to provide a method for manufacturing a slider.

[Means for Solving the Problems] A method for manufacturing a core slider for a magnetic head of the present invention includes arranging a plurality of core sliders at predetermined intervals on a processing table provided on an XY plane, and placing the processing table on the processing table. By making a rocking motion (so-called tracing motion) about the X-axis and Y-axis, and polishing by bringing the polishing tape pressed with a predetermined pressure through the cushioning material into contact with the plurality of core sliders. , is characterized in that the peripheral end of the core slider is chamfered.

[Function] In the configuration of the present invention described above, the spring constant of the cushioning material is K (N/m'), the tape tension of the polishing tape is T (N/distance), the lap pressure is P (N/Peng 1),
If the distance to the adjacent core slider rail is d(-), then the angle of deformation of the cushioning material with respect to the air bearing surface of the core slider (i.e., the polishing angle of the core slider edge)
θ is approximately expressed by the following equation (1).

Therefore, according to the present invention, the above-mentioned K.

By appropriately selecting T, P, and d, it is possible to process the ideal core slider edge curvature, ← chamfering. Furthermore, since a large number of core sliders can be processed simultaneously, productivity is greatly improved.

[Example] The present invention will be described in more detail below with reference to Examples shown in the attached drawings. FIG. 1 is an explanatory diagram showing an embodiment of the present invention. As shown in FIG. 1, a plurality of core sliders 48-4n are fixed on the jig 7 with wax, each core slider 4a-4n has an inner rail pitch d, and each core slider 4a'-4n are arranged with a pitch d. moreover.

The jig 7 on which the core sliders 48 to 4n are mounted is
Due to the action of the tape guide 5 pressurized by the pressure P, it is in contact with the polishing tape 3 via the cushioning material 6. The opposing surfaces of the bush of the tape guide 5 and the extension member 6 are formed of flat surfaces. And the tape guide 5 is
It performs a so-called tracing movement, which is a rocking movement about the axis and the Y-circle direction.

As a result, each core slider's outer rail, inner rail,
The air inflow/outflow ends are each chamfered.

In FIG. 1, for example, the chamfer angle 0 of the core slider 4a can be set to an optimal shape for the flying characteristics of the head. The same applies to the other core sliders 4b to 4n, and according to this embodiment, it is possible to simultaneously chamfer a large number of ideal core slider rails.

FIGS. 2 and 3 are explanatory diagrams showing a chamfer processing apparatus that chamfers a core slider by performing the above-described tracing motion. As shown in FIGS. 2 and 3, the workpiece holding mechanism 8 equipped with the jig 7 has an
1 on the X axis.

They are each configured to swing about the Y-axis by means of contour bearings 9,10. A plurality of core sliders 48 to 4n are mounted on the jig 7. Further, above the jig 7, an abrasive tape 3 to which tension is applied by a tape tension 13 is placed in contact with a cushion material 6 provided on a tape guide 5. The pressing portion consisting of the tape guide 5, the cushion material 6, and the polishing tape 3 is formed to be movable in the vertical direction shown by the arrow 12. As a result, the core sliders 48 to 4n are pressurized and chamfered by the above-described tracing movement. Here, in order to apply ideal lap pressure to each of the contour bearings 9 and 10 and the pressing mechanism, it is desirable to use shafts with low friction, such as air bearings.

FIG. 4 shows the chamfer depth ci around the air bearing surface of the core slider formed by the method of the present invention.
As shown in Figure 1, which is a graph in which p is plotted on the vertical axis and chamfer width l is plotted on the horizontal axis, it can be seen that an ideal chamfer shape with dρ/1 of 50 to 25 has been obtained.

[Effects of the Invention] According to the present invention, a large number of core sliders can be chamfered at the same time, so the productivity of core sliders can be greatly improved.

Further, since a large number of core sliders can be uniformly and properly chamfered, high-quality core sliders can be produced in large quantities. Also.

Since the entire surface of the abrasive tape is chamfered, the life of the abrasive tape is greatly extended. moreover,
Since the core slider is processed through the cushioning material, it is possible to chamfer the core slider into a shape that matches the flying characteristics of the magnetic head, depending on the stress relationship.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of this invention, FIGS. 2 and 3 are explanatory diagrams showing an example of a chamfer processing apparatus for carrying out this invention, and FIG. Diagrams showing the experimental results of a core slider where the vertical axis is the chamfer depth ctp around the air bearing surface and the horizontal axis is the chamfer width l. Figure 5 is a perspective view showing an example of the core slider. Figures (a), (b), (c)
FIG. 2 is an explanatory diagram showing an example of chamfer processing of a conventional core slider. 3... Polishing tape, 48~4n... Core slider,
5...Tape guide, 6...Cushion material, 7...
·jig. 8... Work holding mechanism, 9, 10... Profile bearing, 13... Tape tension. Figure 2. Figure] C Figure (a)

Claims (1)

[Claims] 1. A plurality of core sliders are arranged at predetermined intervals on a processing table provided on the XY plane, and the processing table is oscillated about the A method for manufacturing a core slider of a magnetic head, characterized in that a peripheral end of the core slider is chamfered by polishing the plurality of core sliders by bringing the polishing tape pressed with a pressure at the core slider into contact with the polishing tape.