JPS581826A - Automatic tape lapping device - Google Patents

Abstract

PURPOSE:To increase the quality of a magnetic head, by forming a spherical writing/reading surface for a magnetic head and then running a lapping tape loaded with certain tension over the spherical surface in the backward direction with a certain time interval. CONSTITUTION:A lapping tape is taken up to a draw-out roller 21, and a pinch roller 25 gives certin tension to the tape 22 by means of a spring 24 set at an end of a lever 23. The tape 22 passes through the guide rollers 27, 28 and 29 and turns its direction to round half a rotor 30. Then the tape 22 passes through the guide rollers 30 and 31 to be taken up to a take-up reel 32. The reel 32 is driven by a variable speed motor, and a magnetic head 7 to be lapped is attached to the rotor 30. The head 7 has the forward or backward revolution along with the rotor 30 toward an arrow mark with a certain time interval and regardless of the tape 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing apparatus for a rotary spherical magnetic head for oblique scanning in a large capacity storage device.

mass storage system
(abbreviated as M8S), a coil containing a large number of magnetic tapes (usually 69ffIffI) is housed in a honeycomb-shaped cartridge storage cell, which is automatically pulled out in response to a call, and then magnetically scanned by a diagonal scanning method. This is a device that reads and writes signals via a tape storage medium.

1m is a perspective view of the cartridge storage cell.

The storage cell 1 has a hexagonal shape and is composed of several hundred to one thousand cells. This storage cell 1 has a magnetic tape 2 wound around a coil.
A cartridge 3 containing one is stored therein, and is automatically pulled out in the direction of the arrow in response to a call.

2nd wJ is a perspective view of the diagonal scanning rotary head, in which the magnetic tape 2 runs on the mandrel 4 in a helical pattern, and during this time the diagonal scanning head 5 rotates at about 7000 revolutions per minute to rotate the magnetic tape 2 diagonally. Zero rotation wheel 6 that reads and writes while scanning
A large number of small holes 6 are arranged in the 0 rotation shaft to blow out clean air and provide an air gap between the read head 7 and the write head 8 while the magnetic tape is running, reducing frictional resistance and maintaining an appropriate gap. Sends and receives magnetic signals.

FIG. 3 is an enlarged perspective view of the head (reading head 7 as a representative). The head section 7 is composed of a three-layer ceramic plate 9, and a magnetic pole 10 is embedded in the center of the central layer. Two grooves 11 are provided above and below the magnetic pole and serve as passages for air supply. The distal end surface 12 of the magnetic head has a spherical shape of approximately 19R, and is mirror-polished.

The above-mentioned theory - During scanning, the throat magnetic tape 3 is floated by the forced air flow of the rotary wheel that rotates at high speed and is in a non-contact state with the head 7, but this gap is as small as about 0.5 m. ,
This variation in air gap greatly affects the transmission and reception of signals. For this reason, mirror polishing is applied to the tip end surface of the head in order to eliminate the viscous resistance between the air and the viscous surface, but this alone does not provide a constant and stable flying height.

For this reason, in the past, a wrapping tape was used to manually run the spherical surface 12 at the tip of the magnetic head, and an optical interference lens was used to
, 54 m or less to give drying deformation, and the process was carried out based on the skillful judgment of the operator to change the conditions of surface air flow.

Therefore, processing required many man-hours, production volume was limited by the ability of the workers, and quality remained unstable.

The present invention converts the skilled work into a simple mechanical work by means of an automatic tape wrapping machine.

In other words, a magnetic head with a spherical writing/reading surface is fitted, and a wrapping tape runs under constant tension over a four-wheel and ## rotor that repeats forward and reverse rotation at regular intervals. However, the above-mentioned defects can be removed by an automatic tape wrapping machine fK, which is characterized in that it is fitted onto a scissors rotor that is a wrinkled magnetic head to form the shape.

Specific examples of the present invention will be described in detail below. Sho 1
The same reference numerals in Figures 111 to 5 indicate the same items.

FIG. 4 is a schematic plan view of the main parts of the automatic tape wrapping device according to the present invention. Approximately 18 on of wrapping tape 22 is rolled up on the feeder 21. Since the spring 24 is attached to one end of the lever 23, the lever 23
A pinch roller 25 attached to the other end applies a constant tension to the wrapping tape 22. The wrapping tape 22 has guide rollers 27, 28, 29. The guide roller 30 goes around the half circumference of the rotor 30, and then passes through the guide roller 30.
．． 31, changes direction and is wound up by a winding reel 32. The rotation of this take-up reel is driven by a variable speed motor (not shown). The magnetic head 7 to be wrapped is attached to a rotor 30, and can rotate forward or reverse together with the rotor 30 at fixed time intervals as indicated by the arrow, regardless of the wrapping tape, and the rotational speed is variable.

In the example, 200 rotations for about 1 minute are used.

This device uses a polycrethane-based wrapping tape 22 with a thickness of about 50 #m, and measures the tape tension, rotor rotational speed, forward/reverse time interval, and winding for the magnetic head 7 attached to the rotor 3-OK.

Optimum conditions are selected depending on the material and finish of the magnetic helad 7, with the motor rotation speed and the repetitive work time as changing conditions.

FIG. 5 is a cross-sectional view of the tip of the magnetic head, and shows the magnetic tape 2.
According to the automatic tape wrapping device of the present invention, the wrapping tape 22 is attached to the magnetic head 7Kl1, and
Peripheral ridge 101 of magnetic pole 10 and Cerac ridge 9
1 is polished by a very small amount. (Figure 5 is exaggerated for explanation purposes.) When the magnetic head that has undergone this processing is put into practical use, the magnetic tape 2 floats almost parallel to the magnetic pole surface as shown by the two-dot chain line during scanning. The posture becomes extremely stable. The reason for this is presumed to be that turbulent flow separation occurs due to local disturbance of the supply air flow by the magnetic pole ridge, and the automatic tape wrapping device of the present invention always provides constant characteristics with good reproducibility.

As described above, according to the IJIIK of this invention, the non-contact oblique scanning between the magnetic tape and the head, which is essential for M2S, can be well reproduced and stable characteristics can be obtained, and manufacturing can be carried out economically and there is no restriction on production volume. . Furthermore, by improving the performance, the recording density can be sufficiently increased, recording of 50MB from 14I20fflK can be performed with good reproducibility, and the rotary head technology can be completely put into practical use.

The origin of the processing in this example and the logical analysis of the behavior of the magnetic tape have not yet been obtained.The structure is easy to understand, and the wrapping tape running and tension adjustment mechanisms are not widely used. However, it is also possible to use other means.

Further, in this embodiment, the mechanism is arranged in the 411th nodoku senryo arrangement, and the roller is housed in a spinning container to enable wet lapping, but there is no particular restriction on the selection of hot or dry wrapping.

[Brief explanation of drawings]

1ml is a perspective view of a cartridge storage cell, FIG. 2 is a perspective view of an oblique scanning rotary head, 3g is a perspective view of a magnetic head, and FIG. FIG. 5 is a sectional view of the tip of the magnetic head. In the figure, 1 is a cartridge storage cell, 2 is a magnetic tape, 5 is a diagonal scanning 1-transfer head, 6 is 1 roller, 7 is a reading head, 8 is a writing head, 10 is a magnetic pole 11 is a groove, and 12 is the tip of the magnetic head. A spherical surface, 22 a cupping tag, and 30 a single star. Figure 3 (Fig. 55) - Engraved

Claims (1)

[Claims] A four-turn device, in which a magnetic head whose writing/reading surface is structured as a coccus is fitted, and repeats forward and reverse rotation at regular intervals.
and an automatic tape wok machine, comprising: a tweezing tag that is stretched and travels on the p-tar with a constant tension; the magnetic head is fitted onto the p-tar to form the shape;