JPS62282859A - Magnetic head polishing method and device - Google Patents

Abstract

PURPOSE:To polish a magnetic head in an efficient manner, by feeding an abrasive tape along the longitudinal direction, holding it at two spots, where the feed paths are separated from each other, so as to cause the abrasive tape to be bent in a cross-sectional form, and rotating a magnetic head so as to cross this abrasive tape and to rub against the inner side. CONSTITUTION:An abrasive tape 2 comes into contact with concave surfaces 41a and 42a of holding members 41 and 42, and that it is attracted to these concave surfaces 41a and 42a because these concave surfaces are attracted by suction holes 43 and 44. Moreover, since the abrasive tape is pulled up at slow speed, a cross section of this abrasive tape 2 is bent into a circular form and thereby tensile force is produced between these holding members 41 and 42. Under this state, if a rotor 60 is advanced forward between these holding members 41 and 42 while rotating it, a magnetic head 3 held by the rotor 60 gors across the abrasive tape 2 by rotation, and its tip rubs against a surface of the inside of the abrasive tape 2 and thus polished. Since the tip of the magnetic head 3 runs along the bent inner surface of the abrasive tape 2, at each rotation, they thoroughly rub against each other along a width direction of the abrasive tape 2, thus efficient polishing is performable.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method and apparatus for polishing a magnetic head with a polishing tape.

(Prior Art) Conventionally, the magnetic heald 3 has been polished as shown in FIGS. 8 and 9.

In the method shown in FIG. 8, the abrasive tape 2 is passed around the outer peripheral surface of the abrasive cylinder 100 that holds the magnetic head 3 in a detachable manner, and in this state, the shaft 7) 101 is rotated while feeding the abrasive tape 2 at a slow speed. By doing so, the tip surface of the magnetic spatula l'3 is rubbed against the abrasive tape 2 to perform polishing.

In the method shown in FIG. 9, a large number of support plates 103 are fixed to a shaft 7) 102 that intersects the feeding direction of the polishing tape 2, and the magnetic head 3 is detachably held on the support plates 103.

By reciprocating the shaft 102, the tip end surface of the magnetic head 3 is rubbed against the polishing tape 2 to perform polishing.

(Problems to be Solved by the Invention) In the method shown in FIG. 8, the abrasive tape 2 is applied to the outer circumferential surface of the abrasive cylinder 100 and rubbed, so the cylinder 100 is worn out and the abrasive tape 2 is wasted. There was a drawback that it was consumed. Moreover, since the polishing tape 2 rubs against the Schilling-100 before reaching the magnetic head 3, efficient polishing cannot be performed.

In addition, the magnetic head 3 is rubbed along the longitudinal direction of the abrasive tape 2, and in order to effectively utilize almost the entire area of the abrasive tape 2, it is necessary to not only rotate the shaft 7) 101. Although it is necessary to reciprocate, when the cylinder 100 reciprocates, the polishing tape 2 shakes and stable polishing cannot be performed.

In the method shown in FIG. 9, since the magnetic head 3 rubs against the flat polishing tape, the amount of polishing per reciprocating rotation is small and efficient polishing cannot be performed. Also, in this method, the magnetic head 3 is rubbed along the longitudinal direction of the abrasive tape 2, and in order to effectively utilize almost the entire area of the abrasive tape 2, a large number of magnetic heads 3 are arranged in parallel. Therefore, the work of attaching and removing the magnetic spatula I'3 to a large number of support plates 103 fixed to the shaft 102 at narrow intervals was time consuming. Furthermore, the area between the magnetic heads 3 on the polishing tape 2 is not polished, resulting in waste.

(Means for Solving the Problems) The method of the present invention has been made to solve the above problems, and its gist is that in a method of polishing a magnetic head with an abrasive tape, the abrasive tape is The abrasive tape is held so that its cross-sectional shape is curved at two points separated from each other on this feed locus, and the magnetic head is moved across the abrasive tape so as to rub against the inner surface of the abrasive tape. A method for polishing a magnetic head, which comprises rotating a magnetic head.

Furthermore, the key points of the device of the present invention are that, in the device for polishing a magnetic head with an abrasive tape, (a) a feeding mechanism for feeding the abrasive tape, and (b) a pair of abrasive tapes arranged at intervals along the feeding locus of the abrasive tape. (c) a holding mechanism having a holding member, a curved concave surface in contact with the abrasive tape, and a vacuum suction hole formed in the concave surface;
a movable table movable toward and away from the holding mechanism; A magnetic head polishing apparatus comprising: a rotating body that is rotatably supported and allows the magnetic head to face the polishing tape between the pair of holding members as the movable table moves.

(For A) The magnetic head rotates across the abrasive tape, which has a curved cross-sectional shape, and rubs against the inner surface of the abrasive tape, allowing for efficient and stable polishing, and economical use of the abrasive tape without wasting it. .

With the apparatus of the present invention, the curved shape of the abrasive tape can be reliably maintained by vacuum and suction.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 1 to FIG. 7.

1 in Figures 4 and 5 is a frame, and this frame 1
The system includes a feeding mechanism 10 for feeding the abrasive tape 2, a guide mechanism 2° for guiding the abrasive tape 2, and a holding mechanism 40 arranged near the feed locus of the abrasive tape 2 and holding the abrasive tape 2 in a predetermined shape. and a rotating body 6 that holds the magnetic head 3.
0 etc. is provided.

The feeding mechanism 10 includes a pair of glue rules 11 arranged above and below.
．． It has 12. An unused abrasive tape 2 is wound around the upper reel 11, from which the abrasive tape 2 is gradually drawn out. Further, the lower reel 12 is rotated at a very low speed by a motor (not shown) to wind up the used abrasive tape 2.

The guide mechanism 20 includes idle rollers 21 and 22, which are respectively disposed at the ends of the upper and lower reels 11 and 12. These idle rollers 21 and 22 are rotatably supported by lees receivers 23 and 24 fixed to the frame 1, respectively. The idle rollers 21, 22 have curved concave surfaces 21a, 22a that are formed when the arc is rotated at a position away from the rotation axis. These guide rollers 2
1゜22, each has a rubber idle roller 25゜2.
6 is pressed. The guide rollers 25 and 26 have curved convex surfaces 25a and 26a that are formed when the arc is rotated at a position I-8 from the rotation axis. The convex surfaces 25a, 26a and the concave surfaces 21a, 22a of the guide rollers 21, 22 are curved with approximately the same curvature, and the abrasive tape 2 is sandwiched between these surfaces.

Rubber idle rollers 25 and 26 are each mounted on a bearing 27.
It is rotatably supported by 28.

The upper bearing 27 has a rod 29 having threaded portions at both ends.
or is slidably penetrated. The proximal end of the rod 29 is fixed to the bearing 23, and a stopper 30 is attached to the distal end. A spring 31 is wound around the outer periphery of the rod 29 between the stopper 30 and the bearing 27, and this spring 31 biases the idle roller 25.

The lower bearing 28 is supported by the upper end of the link 32. This link 32 is rotatably supported by the frame 1 at the middle part, and the lower end is pulled by a spring 33, so that a rotational force is applied in the clockwise direction in FIG. 2, and as a result, the guide The roller 26 is biased in the direction of the guide roller 22.

The abrasive tape 2 is attached to a pair of upper guide rollers 21.25.
A pair of lower rollers are sandwiched between the idle rollers 22.
．． 26 and is guided in a state in which it is held in place by 26, and is sent vertically downward.

One end of a link 35 is rotatably supported on the frame 1 between the upper reel 11 and the guide roller 21, and the other end of the link 35 is provided with a roller 37 and pulled upward by a spring 36. . The abrasive tape 2 is wrapped around the roller 37 to prevent it from loosening. The upper reel 11 is operated by a braking member 13 which is interlocked with the link 35 and urged by a spring 36.
Free rotation is prevented with a light force.

A roller 39 is rotatably supported on the frame 1 between the lower reel 12 and the guide roller 22.
The abrasive tape 2 is wrapped around this roller 39.

The holding mechanism 40 has a pair of upper and lower holding members 41 and 42. As shown in FIGS. 1 to 3, the holding members 41 and 42 have concave surfaces 41a and 41, which constitute a part of the cylindrical surface.
2a, and a large number of small vacuum suction holes 43, 44 are formed in the concave surfaces 41a, 42a.

A suction chamber 45.46 is formed in the holding element 41.42, which suction chamber 45.46 is connected via a tube 47.48 to a vacuum device (not shown).

The holding members 41 and 42 are supported so as to be slidable in the vertical direction relative to the frame 1, and their positions are adjusted by an adjustment mechanism 50.

In detail, the holding members 41.42 include brackets 51.42.
52 is fixed. The lower bracket 52 has a splash hole 52a formed therein (1), and the upper bracket 51 has an insertion hole 51a formed therein.

The lower part of the screw rod 53 is screwed into the screw hole 52a and locked with a lock nut 54, and the insertion hole 52a is locked with a lock nut 54.
The upper part of the pulling rod 53 is slidably inserted into 1a. A support nut 55 is screwed into this tightening rod 53. Ikegata, Frame 1 has brackets facing up and down.
r 56, 57 are fixed, and these brackets)
Microscrews 58 and 59 are screwed into 56 and 57.

In the adjustment mechanism 50, first, the microscrew racket)
56. Protrude from 57. In this state, the holding member 4
The lower surface of the bracket 52 is in contact with the tip of the microscrew 59, and the holding member 42 is thereby positioned. Next, the holding member 41 is positioned by turning the support nut 55 and pushing up the bracket 51 so that its top surface touches the tip of the microscrew 58. In this way, the holding members 41° 42
The interval between the two is adjusted.

The rotating body 60 removably holds two magnetic heads 3 on its upper surface. In this holding state, the tip of the magnetic head 3, that is, the head chip protrudes from the periphery of the upper surface of the rotating body 60. There is. The attachment means for the magnetic head 3 may be screws 61 as shown in the figure, or may be a chuck mechanism or the like that is easy to attach and remove. The rotating body 60 is rotatably supported by a movable table 63 by a shaft 62 extending vertically (parallel to the polishing tape 2), and a boot 176 fixed to the lower end of the shaft 62.
4 to a motor (not shown).

The movable table 63 moves horizontally along a rail (not shown) formed on the frame 1, and is moved toward or away from the holding mechanism 40 by a motor (not shown). The movement stroke of the moving table 63 can be adjusted. Incidentally, as shown in FIG. 5, a long hole 1a is formed in the frame 1 in correspondence with the movement stroke of the moving table 63.

In the above configuration, the polishing tape 2 is guided by the guide mechanism 20 so that the guide roller 21.25 and the idle roller 22.26 are perpendicular to each other, and the concave surface 41a of the holding member 41.42.

42a. Since suction is applied to the concave surfaces 41a, 42a by the vacuum suction holes 43, 44, the polishing tape 2 is attracted to the concave surfaces 41a, 42a. The lower reel 12 forcibly pulls the abrasive tape 2 at a slow speed against the adsorption force on the concave surfaces 41a and 42a. Therefore, tension is generated in the abrasive tape 2 between the holding members 41 and 42.

The polishing tape 2 is attached to the concave surface 21a of the idle roller 21.22.
, 22a, and the convex surfaces 2Sa, 2 of the idle rollers 25.26
The abrasive tape 2 tends to have a concave surface 41a, which is sandwiched between the concave surface 41a,
42a, the cross section therebetween is reliably curved into an arc shape.

In the above state, when the moving table 63 is moved toward the holding mechanism 40 while rotating the rotating body 60, the magnetic head 3 held by the rotating body 60 faces the center between the holding members 41 and 42, and due to the rotation, It traverses the abrasive tape 2 and its tip rubs against the inner surface of the abrasive tape 2 to perform polishing. Since the tip of the magnetic head 3 runs along the curved inner surface of the abrasive tape 2, the tips of the magnetic head 3 almost completely rub against each other along the width direction of the abrasive tape 2 every rotation, resulting in , efficient polishing can be performed.

In addition, since the feeding direction of the abrasive tape 2 is perpendicular to this rubbing direction, the abrasive tape 2 is applied to almost the entire area.
,, Lr Q MWml-744-J-! ) t,
aI<ku! / There is no waste.

Note that the radius of curvature of the rotation locus of the tip of the magnetic head 3 may be made equal to the radius of curvature of the concave surfaces 41a and 42a of the holding member 41.42, that is, the radius of curvature of the detected shape of the polishing tape 2. As shown in FIG. 2, it may be made slightly smaller so that the tip of the magnetic helad 3 can easily enter from the end of the polishing tape 2.

The rotation locus of the tip of the magnetic helad 3 is the same as that of the holding members 41 and 42.
The magnetic head 3 protrudes slightly to the right in FIG. 2 from the imaginary extended surfaces of the concave surfaces 41a and 42a, so that the magnetic head 3 pushes the abrasive tape 2 against the attraction force on the concave surfaces 41a and 42a. The above polishing is performed by applying frictional force to the contact surface between the magnetic head 3 and the polishing tape 2.

The smoothness of the polished surface at the tip of the magnetic head 3 can be adjusted by changing the suction force at the vacuum suction holes 43 and 44. That is, as the suction force increases, the resistance to the winding of the lower pulley 12 increases, and the tension of the abrasive tape 2 + + - ht ÷ vibration / n1λ
1. , the frictional force between the V-rire swamp hemp 4-p 2 increases, resulting in relatively rough polishing. On the other hand, when the suction force is reduced, polishing becomes relatively precise.

Furthermore, the shape of the polished surface at the tip of the magnetic head 3 can be selected from a wide range. That is, abrasive tape 2
Because it is pushed into the magnetic head 3, it bends at the point of contact with the magnetic head 3, forming a dogleg shape between the holding members 41 and 42 (actually, it is bent by a small angle that cannot be seen with the naked eye). ). The more the stroke of the moving table 63 is changed to increase the amount of protrusion of the magnetic head 3, and the more the adjustment mechanism 50 narrows the gap between the holding members 41 and 42.
As the above-mentioned bevel angle increases, the amount of polishing of the top and bottom surfaces of the tip of the magnetic head 3 by the polishing tape 2 increases, and as a result, the contour line of the polished surface of the tip of the magnetic head 3 as shown in FIG. Flattened vertically.

Also, contrary to the above, if the amount of protrusion is reduced or the distance between the holding members 41 and 42 is widened, the amount of polishing of the upper and lower parts of the tip of the magnetic spatula (3) by the abrasive tape 2 will be reduced. As shown by the contour lines in the figure, the polished surface at the tip of the magnetic head 3 becomes less flat.

The wide selection of abrasive surface shapes described above is achieved by the magnetic head 3 traversing the abrasive tape 2 and the abrasive tape 2 being bent longitudinally. Therefore, when the magnetic head 3 rubs along the longitudinal direction of the polishing tape 2 as in the conventional method shown in FIGS. 8 and 9, it is difficult to select the shape of the polishing surface. Incidentally, in the conventional method described above, the polished surface often takes the shape shown by the contour lines in FIG.

The present invention is not limited to the above embodiments, and various embodiments are possible. For example, in the method of the present invention, relative tape feeding may be performed by moving a rotating body that holds the magnetic spatula Y along the longitudinal direction of the abrasive tape.

Further, in the method of the present invention, the abrasive tape may be held by means other than vacuum suction.

Furthermore, the rotating body may be a cylinder actually used in a VTRR device or the like. In this case, as in the case of the above embodiment, the magnetization is applied after polishing is completed.

This saves the trouble of removing the card from the rotating body and transferring it to the shilling.

Mainly, the magnetic head Y may rotate back and forth over a predetermined angle.

(Effects of the Invention) As explained above, in the method of the present invention, polishing can be performed efficiently and stably, and the polishing tape can be used economically without significant waste.

Further, in the apparatus of the present invention, the curved shape of the abrasive tape can be reliably maintained by vacuum suction.

[Brief explanation of drawings]

The drawings mainly shown in FIGS. 1 to 7 show one embodiment of the present invention, and FIG. 1 is a perspective view showing the main parts of the device of the present invention;
2 is a side view of the same, FIG. 3 is a plan view of the same, FIG. 4 is a side view of the entire device of the present invention, FIG. 5 is a plan view of the same, and FIGS. 6 and 7 are polished by the method of the present invention. Figures 8 and 9 respectively show the shape of the polished surface at the tip of the magnetic head with contour lines.
0... Feeding mechanism, 40... Holding mechanism, 41.42.
...Holding member, 41a, 42a...Curved concave surface, 4
3.44... Vacuum suction hole, 60... Rotating body,
63...Moving table.

Claims (2)

[Claims] (1) In a method of polishing a magnetic head with an abrasive tape, the abrasive tape is fed relative to the magnetic head along its longitudinal direction, and the cross-sectional shape of the abrasive tape is A magnetic head polishing method comprising: holding the magnetic head in a curved manner and rotating the magnetic head so as to cross the polishing tape and rub against the inner surface of the tape. (2) An apparatus for polishing a magnetic head with an abrasive tape, which includes (a) a feeding mechanism for feeding the abrasive tape, and (b) a pair of holding members arranged at intervals along the feeding locus of the abrasive tape. (c) a holding mechanism in which a curved concave surface in contact with the abrasive tape is formed on this holding member, and a vacuum suction hole is formed in this concave surface; a moving table; (d) holding the magnetic head, rotatably supported by the moving table with a rotation axis parallel to the feeding direction of the abrasive tape, and moving the magnetic head as the moving table moves; A magnetic head polishing device comprising: a rotating body that faces the polishing tape between the pair of holding members.