JPH0697496B2 - Processing device for inflow slope of magnetic head - Google Patents

Description

The present invention relates to an apparatus for processing an inflow slope of a core slider of a floating magnetic head, and an apparatus for automatically processing an inflow slope of a core slider of a magnetic head, in which the inflow slope is evenly balanced. well,
Moreover, with the aim of realizing a device that can perform high-precision machining, it has a lapping plate that reciprocates in a linear direction and a slider that reciprocates in a linear direction that intersects the linear movement direction of the lapping plate. A lap block for fixing an adhesive block to which a core slide block is adhered is placed on a surface plate, and a rod of a rod end bearing whose height can be finely adjusted is supported with respect to the slider. The lap block is provided with a taper surface at the lower end of the pressing shaft supported by the arm portion of the slider so as to be vertically movable, and is inserted into the recess formed in the upper surface of the wrap block. It is configured so that a pressure load is applied.

[Industrial application field]

Information is recorded on a magnetic recording disk in a magnetic disk device.
The magnetic head for reproducing is recorded / reproduced in a state of being levitated by the wind force when the magnetic recording disk rotates at high speed. The present invention relates to a device for processing an inflow slope of a core slider of such a floating magnetic bed.

[Inflow slope of magnetic head]

FIG. 4 is a side view showing a state where information is recorded / reproduced by the magnetic head. Reference numeral H denotes a magnetic head, and the core 3 around which the coil 2 is wound is mounted on the rear end of the core slider 1. Then, information is recorded / reproduced on / from the magnetic recording disk 4 in the gap G between the core 3 and the core slider 1.

The core slider 1 is attached to and supported by a spring arm 6 via a thin leaf spring 5 called a gimbal, and the spring arm 6 is attached to a drive shaft 8 via a drive arm 7.

Since the magnetic recording disk 4 rotates at high speed, the core slider 1 floats by the wind force in the direction of the arrow a ₁ generated at that time. Therefore, in the gap G at the rear end, recording / reproducing is performed with a minute floating gap between the magnetic recording disc 4 and the rear end.

As described above, in order to levitate the core slider 1 by wind force, the air inflow slope 9 is formed at a position facing the magnetic recording disk 4 at the tip of the core slider 1, so that the core slider 1 is easily levitated. is doing. Therefore, the levitation characteristics are affected by the inflow slope 9 of the levitation air, and therefore the formation of the inflow slope 9 requires very high accuracy.

FIG. 5A is a perspective view of the core slider 1. The surface (slider surface) of the core slider 1 facing the magnetic recording disk 4 has two rails 10 and 11. The inflow slope 9 is formed at the tips of the air bearing rails 10 and 11. As shown in FIG. 6B, the inflow slope 9 has a depth of 2 to 7 μm in the floating direction and a length of 300 to 600 μm in the rail direction. As a result, the inclination angle θ is 20 ′ to 20 ′.
40 '.

[Conventional technology]

FIG. 6 shows a core slider block before forming an inflow slope.
12 is a perspective view of 12, and a region 9a shown by a chain line is polished to form an inflow slope, and then cut from a position shown by a broken line 13 to form about 10 core sliders.

FIG. 7 is a side view showing a conventional manual inflow slope processing method. 14 is a wrap block, and an adhesive block 1
5 and 16 are attached. The core slider block 12 shown in FIG. 6 is bonded to the front end adhesive block 15, and the dummy core slider 17 is bonded to the rear end adhesive block 16. In such a state, the core slider block 12 and the dummy core slider 17 are brought into contact with the surface plate 18 coated with the lapping agent and manually moved back and forth. Since the dummy core slider 17 is thicker than the core slider block 12, the inflow slope of the angle θ is formed while rubbing on the surface plate 18.

[Problems to be Solved by the Invention]

However, in such a manual work, the degree of force application and the method of applying the paste vary depending on the operator, and as a result, the processing amount varies and the processing time also changes. Since the depth of the inflow slope 9 in the floating direction is only about several μm as described above, variations in the polishing amount tend to occur between the left and right sides. Moreover, if there is a difference of 1 μm between the left and right shaving amounts,
It becomes 100 times in the length direction, and it will not be within the dimensional tolerance. Therefore, manual work requires the skill and experience of the operator, and it is difficult to put it within the fixed size.

In order to solve such a problem, it has been proposed to rotate a disk-shaped lapping machine, place an adhesive block to which a core slider block is adhered, and place a weight on the adhesive block. . However, since the lapping machine has a constant rotation direction, the processing amount is uneven, and it is difficult to press the core slider block stably and uniformly on the lapping machine, resulting in variations in the polishing amount.

The technical problem of the present invention is to pay attention to such a problem, and to provide an apparatus for automatically processing an inflow slope of a core slider of a magnetic head, which is capable of processing the inflow slope uniformly and in good balance and with high accuracy. It is to be realized.

[Means for Solving the Problems]

FIG. 1 is a side view for explaining the basic principle of an apparatus for processing an inflow slope of a magnetic head according to the present invention. A lapping plate 19 reciprocates in the direction perpendicular to the paper surface. It has a slider 20 that reciprocates in a linear direction (left-right direction in the drawing) intersecting the linear movement direction of the lap surface plate 19.

A lap block 22 for fixing an adhesive block 21 to which the core slider block 12 is adhered is placed on the lap surface plate 19.

A rod 24 of a rod end bearing 23, which is supported by the slider 20 so that its height can be finely adjusted, is fixed to the lap block 22.

A tape surface 27 at the lower end of a holding shaft 26 supported by the slider arm portion 20a so as to be vertically movable is inserted into a recess 25 formed on the upper surface of the lap block 22, and the pressing load W is applied to the holding shaft 26. Is added.

[Action]

The core slider block 12 placed on the lap surface plate 19 includes an adhesive block 21, a lap block 22 and a pressing shaft.
A load W is applied via 26. Further, by adjusting the height of the rod end bearing 23, the processed surface of the core slider block 12 is inclined by θ with respect to the surface of the lapping platen 19.

In this state, when the lap platen 19 is reciprocated in the direction perpendicular to the paper surface and the slider 20 is reciprocated in the left and right directions,
The core slider block 12 will be reciprocally moved relative to the lapping surface plate 19, mutual contact surfaces are polished,
An inflow slope is formed. Moreover, unlike the case where a conventional rotary lapping machine is used, the machining surface is relatively reciprocated unlike the case where the lapping machine is machined from only one direction.

The speeds of the lap surface plate 19 and the slider 20 can be freely set. For example, while the lap surface plate 19 makes one reciprocation every 1 to 2 minutes, the slider 20 makes one reciprocation once per second. It is better to increase.

When the lap block 22 is viewed in the arrow a ₁ direction, that is, from the rod end bearing 23 side, it is as shown in FIG. That is, the recess 25 is formed right above the axial center of the rod 24 of the rod end bearing 23, and the pressing shaft 26 is inserted therein. Since the lower end of the pressing shaft 26 has the tapered surface 27, the wrap block 22 makes a line contact with the pressing shaft 26, and the wrap block 22 can easily move. Further, the rods 24 of the rod end bearing 23 are located right above the center position of the adhesive block 21 in the longitudinal direction, and are orthogonal to each other. Moreover, since the lower end of the rod 24 and the inner surface of the rod end bearing 23 are in line contact with each other, the horizontal balance is good. Therefore, the adhesive block 21
The rod 24 can be smoothly rotated in the directions of arrows a ₂ and a ₃ around the rod 24, and the load W is uniformly applied to all the processed surfaces.

Further, when adjusting the height of the rod end bearing 23 in order to obtain the angle of the inflow slope, the lap block 22 is
Although it moves up and down about the tapered surface 27, the tapered surface 27 and the recess 25 are in line contact with each other at this time as well, so that the smooth adjustment can be performed.

In this way, since the lap block 22 moves smoothly and absorbs the inclination of the lap surface plate 19 and the inclination of the core slider block 12, the core slider block 12 always hits evenly on the lap surface plate 19 for high-precision machining. Is possible.

〔Example〕

Next, practical examples of how the apparatus for processing the inflow slope of the magnetic head according to the present invention is embodied will be described. FIG. 3 is a perspective view illustrating an apparatus for processing an inflow slope of a magnetic head according to the present invention. The same parts as those of the apparatus in FIGS. 1 and 2 are designated by the same reference numerals. Lap surface plate 19
Is connected to a pin 30 of a wheel 29 via a crank 28 so that the core slider block 12 can reciprocate in the longitudinal direction. Therefore, by continuously rotating the wheel 29 at a low speed of about 1 rotation for 1 to 2 minutes, the lap platen 19 reciprocates once for 1 to 2 minutes.

Further, the slider 20 is connected to a pin 33 of a wheel 32 via a crank 31 so that the slider 20 can reciprocate in a direction perpendicular to the longitudinal direction of the core slider block 12. for that reason,
As the wheel 32 continuously rotates at a relatively high speed of about 1 revolution per second, the slider 20 reciprocates once per second.

The lap platen 19 and the slider 20 are supported by a table or a frame (not shown) so that the lap platen 19 and the slider 20 can be stably reciprocated in the linear direction.

A rod end bearing 23 is supported on the slider 20 so as to be vertically movable. By rotating a nut 34, the height of the rod end bearing 23 can be adjusted. The rod 24 of the lap block 22 to which the adhesive block 21 is fixed is inserted into and supported by the rod end bearing 23. The rod end bearing 23 may be simply mounted on the slider 20 via the nut 34, but a vertical shaft 35 supporting the rod end bearing 23 may be inserted and fixed to the slider 20.

The lap block 22 has a recess as shown in FIGS. 1 and 2 just above the center position of the core slider block 12 in the longitudinal direction. Then, in this recess, the pressing shaft 26
The taper surface 27 of is inserted, but this pressing shaft 26 is
Arm 20 extending from slider 20 onto lap block 22
It is inserted in the vertical hole of a. On the holding shaft 26,
With a method such as placing a weight or pressing with a spring,
A load W is applied.

In this device, by rotating the nut 34, the height of the rod end bearing 23 is adjusted and the inflow slope angle of the core slider block 12 is set, and then the lap surface plate 19 and the slider 20 are reciprocated in a linear direction for a predetermined time. By moving it, an inflow slope is formed. In addition, the lapping agent is a lapping plate
It is applied or dropped on the surface of 19. However, this work may be automatic or manual.

In order to process the inflow slope, it is preferable to use, as the lapping plate 19, a ceramic lapping plate for roughing and a hardened SUS (stainless steel) material for finishing. At this time, after the lap surface plate for rough processing has been processed for a predetermined time, the lap surface plate is withdrawn, and then the lap surface plate for finishing is advanced to finish the product for a predetermined time. By adopting a structure in which two lapping plates are automatically replaced, rough machining to finishing of the inflow slope can be performed automatically.

〔The invention's effect〕

As described above, according to the present invention, while the core slider block 12 is placed on the lap surface plate 19, the lap surface plate 19 is reciprocated in the linear direction and the slider 20 is moved in the intersecting direction.
Since the core slider block 12 is reciprocally moved in the linear direction by the above method, the entire surface of the core slider block 12 can be evenly and well-balanced as compared with the conventional device using a rotating lapping machine.

In addition, since the core slider block 12 has a supporting structure that can smoothly move in all directions, the inclination angle of the inflow slope can be easily set, and high-precision machining can be performed.

[Brief description of drawings]

FIG. 1 is a side view for explaining the basic principle of an apparatus for processing an inflow slope of a magnetic head according to the present invention, FIG. 2 is a rear view as seen from a rod end bearing of the apparatus, and FIG. 3 is an embodiment of the apparatus of the present invention. 4 is a side view showing a state where information is recorded / reproduced by a magnetic head, FIG. 5 is a perspective view of a core slider and a side view of an inflow slope portion, and FIG. FIG. 7 is a perspective view of the core slider block before forming, and FIG. 7 is a side view showing a conventional manual working method. In the figure, 1 is a core slider, 4 is a magnetic recording disk, and 9 is a magnetic recording disk.
Is an inflow slope, θ is an incline slope angle, 10 and 11 are air bearing rails, 12 is a core slider block, 13 is a separation position, 19 is a lapping plate, 20 is a slider, 20a is an arm part, and 21 is an adhesive block. , 22 is a lap block, 23 is a rod end bearing, 24 is a rod, 25 is a recess, 26 is a holding shaft, W is a load, 27 is a tapered surface, and 34 is an adjusting nut.

Claims (1)

[Claims] 1. A lap surface plate (19) which reciprocates in a linear direction.
And a slider (20) that reciprocates in a linear direction intersecting the linear movement direction of the lap surface plate (19), and the core slider block (12) is bonded to the lap surface plate (19). A wrap block (22) for fixing the adhesive block (21) is placed, and a rod (24) of a rod end bearing (23), which is supported so that its height can be finely adjusted, is mounted on the slider (20). ,
Provided on the lap block (22), and a recess (25) formed on the upper surface of the lap block (22)
At the lower end, a tapered surface (27) of a holding shaft (26) supported by the arm portion (20a) of the slider so as to be vertically movable is inserted, and the pressing load (W) is applied to the holding shaft (26). An apparatus for processing an inflow slope of a magnetic head, characterized in that