JPH0453662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is capable of automatically and properly rounding the edge corner of the top surface of a head for a flexible disk head (information storage medium). The present invention relates to a method and apparatus for R-chamfering a flexible disk head.

[Problems to be solved by conventional techniques and ideas]

During read/write, the head slides into contact with a flexible disk head similar to the phono sheet of a record, but if the edge corners of the head surface are sharp, it will damage or break the flexible disk head, so there are no sharp edges at all. Must be chamfered into a smooth curved surface.

This chamfering process has traditionally been done manually, but the problem is that the head is shaped like an extremely thin piece of plate.
Currently, it is extremely difficult due to the problems of mass-produced products, and for this reason, there is a strong demand for complete automation.

Furthermore, it is required not only to chamfer the head with high efficiency, but also to chamfer the head with good precision and accuracy.

However, when artificially chamfering is done, the chamfering tends to vary in position, and moreover, the chamfering tends to be uneven in some parts, which causes the further inconvenience of affecting the quality inspection process in the subsequent process. was.

The present invention focuses on the various drawbacks of the conventional methods as described above, and provides an automatic R-chamfer polishing method for a flexible disk head and an apparatus therefor, which can chamfer the head at high speed, reliably, and accurately. This is what I am trying to do.

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

The abrasive tape 3 is stretched over the head surface 1a of the head 1 for a predetermined length almost parallel to the head surface 1a and brought close to it, and the abrasive tape 3 is continuously stretched approximately parallel to the head surface 1a by the winding and transferring device 4. in a direction substantially parallel to this head surface 1a,
The head 1 is rotated in the back and forth direction of the abrasive tape transport direction P, with the abrasive tape transport orthogonal axis Y, which is orthogonal to the abrasive tape transport direction P, as a rotational movement axis, and is perpendicular to the abrasive tape transport direction P. The axis of rotation is a head surface center normal axis X in a direction perpendicular to the abrasive tape transport orthogonal axis Y,
This invention relates to an automatic R-chamfer polishing method for a flexible disk head, characterized in that the head 1 is rotated continuously or intermittently to perform R-chamfering on all edge corners 1b of the head surface 1a.

A head support base 2 for supporting the head 1, an abrasive tape 3 stretched over the head surface 1a of the head 1 for a predetermined length approximately parallel to the head surface 1a, and brought close to the head surface 1a; A winding and transporting device 4 that winds upward and continuously transports the tape in parallel; an abrasive tape transport orthogonal axis Y that is substantially parallel to the head surface 1a and orthogonal to the abrasive tape transport direction P is used as a rotating and oscillating axis; A head rotation movement mechanism part A that rotates the head support base 2 in the front and back direction of the abrasive tape transport direction P, and a head rotation movement mechanism part A that rotates the head support base 2 in a direction perpendicular to the abrasive tape transport direction P and perpendicular to the abrasive tape transport orthogonal axis Y. a head rotation mechanism part B that rotates the head support base 2 continuously or intermittently about the head surface center normal axis X in the direction as a rotation axis;
This invention relates to an automatic R-chamfer polishing device for a flexible disk head, which is characterized by comprising:

[Function and Examples]

The abrasive tape 3 is wound around a winding and transporting device 4 (supply reel 4), and this winding and transporting device 4 is connected to a machine base 5.
A vertical slide plate 6 that moves up and down by a front upper cylinder (not shown) is rotatably mounted on the left side of the vertical slide plate 6, and a guide cylinder 7 is vertically installed in the center of the vertical slide plate 6. There is a screw mechanism 8 inside.
The adjustment rod 9 is inserted through it so that it can be slightly adjusted up and down,
Guide rollers 1 are provided on both left and right sides of the lower end of this adjustment rod 9.
0 is suspended horizontally, and a regulating plate 11 having a cushioning action in the upward and circumferential directions is attached to the center of the lower end, and furthermore, on the right side of the vertical sliding plate 6, there are two upper and lower stages of pull-out rollers 12a, 12b is attached in a pressed state by a pressure contact spring 13, and the abrasive tape 3 pulled out from the supply reel 4 bypasses the left and right guide rollers 10 to be parallel to the head surface 1a, and then is inserted between the pull-out rollers 12a and 12b. The abrasive tape 3 is continuously transported at a relatively constant speed by the rotation of the pull-out roller 12a, and the vertical slide plate 6 is moved by a cylinder during non-chamfering processing.
, the abrasive tape 3, supply reel 4, etc. are moved upward, and conversely, during chamfering, the vertical slide plate 6 is lowered, and the abrasive tape 3 is moved to an opposing position at a close position slightly away from the head surface 1a. do.

The head rotation mechanism section A in this figure will be explained.

A support stand 14 is installed horizontally in the front and back direction in the middle of the machine stand 5, and the swing cylinder 1 is mounted on this support stand 14 by a bearing 15.
6 is hung horizontally so that it can swing and rotate freely, a connecting cylindrical plate 17 is attached to the front part of this oscillating cylinder 16, and a head 1 is supported on the upper surface of a mounting base 18 in front of this connecting cylindrical plate 17. 2 is removably attached with the head surface 1a and the axis of the swing cylinder 16 aligned, and a crank board 19 is fixed to the rear of the swing cylinder 16 with a key 20, and the board surface of the crank board 19 is fixed to a predetermined position. The upper end of the connecting rod 21 is pivotally connected at a radial position by a pin 22, and a belt 27 is suspended between this intermediate portion 23 and a pulley 26 of a continuously rotating oscillating motor 25. Therefore, the crank disk 19 is rotated and oscillated by a predetermined angle, and the head 1 is polished in the left and right direction perpendicular to the polishing tape transport direction P via the swing cylinder 16, the connecting cylinder disk 17, the mounting base 18, and the head support base 2. The abrasive tape is rotated and oscillated in the front and back direction of the abrasive tape transport direction P using the tape transport orthogonal axis Y as the rotational and oscillating axis.

The head rotation mechanism section B in this figure will be explained.

A bearing 2 for a rotating shaft 28 is disposed within the swing cylinder 16.
A main bevel gear 30 is fixed to the front end of the rotating shaft 28, and an intermediate shaft 31 is rotatably installed vertically in front of the main bevel gear 30 with a bearing 32. The secondary bevel gear 33 that meshes with the bevel gear 30 is fixed, and the main bevel gear 30 is also fixed, and the mounting base 1
A mounting shaft 35 is rotatably installed vertically on the mounting shaft 35, a slave gear 36 that meshes with the main gear 34 is fixed to the mounting shaft 35, and the head support base 2 is removably engaged with the mounting shaft 35. A rotary pulley 38 is fixed to the rear end of the rotary shaft 28 with a key 37, and a belt 41 is suspended between the rotary pulley 38 and a rotary pulley 40 of a rotary motor 39 capable of continuous rotation and intermittent indexing. In addition, a mounting arm 43 is provided protrudingly on the outer circumferential surface of the boss portion of the rotary pulley 38, and the lower end of an engaging protrusion 44 that is moved to protrude and retract into the mounting arm 43 by air is a V-shaped notch groove 4.
2, and when the head 1 is rotated 90 degrees, the engaging protrusion 4
4 is removed by the V-shaped notch groove 42, the rotation motor 39 is rotated 90 degrees, and the head 1 is removed via the rotating shaft 28, main bevel gear 30, subordinate bevel gear 33, main gear 36, subordinate gear 36, and head support base 2. It is sufficient to rotate the head 1 by 90 degrees, and then plunge the engagement rod 44 into engagement with the V-shaped notch groove 42 to fix the position.If the head 1 is to be rotated continuously, the engagement rod 44 can be rotated 90 degrees. If the head 1 is separated by the V-shaped notch groove 42 and the rotation motor 39 is continuously rotated, the head 1 will be continuously rotated.

In addition, in this figure, the head 1 is in the form of a very thin plate (3 mm long x
6 mm in width x 2 mm in thickness, making it unsuitable for attachment and detachment. Therefore, the head 1 is attached to the head support base 2 in advance so that it can be attached and detached together with the head support base 2. A head attachment/detachment mechanism section C allows the head support base 2 to be attached/detached.

Although not shown in detail, this head attachment/detachment mechanism C has a cylinder 45.
When the detachable pin 47 in the mounting shaft 35 is pushed up by the pushing up action of the cylinder rod 46, the head support 2 becomes free and can be removed.
The head support 2 is fixed in position only when the cylinder rod 46 is lowered and separated by the attachment/detachment pin 47.

In addition, although the rotational movement angle θ of the head 1 in this figure is 11 degrees on the left and right, for a total of 22 degrees, it is sufficient to select the best angle experimentally depending on the size of the head 1. The transport speed and roughness of the abrasive tape 3, the rotational speed of the head 1, the vibration speed of the head 1, etc. are also experimentally determined to be optimal.

Next, the operation of the apparatus with the above configuration will be explained.

The head 1 is attached to the head support base 2 in advance, and with the head attachment/detachment mechanism C activated, the operator places the head support base 2 on the mounting shaft 35, and then attaches the cylinder rod of the cylinder 45 of the head attachment/detachment mechanism C. 46 is lowered to fix the head support base 2 in position. The vertical slide plate 6 is lowered to position the abrasive tape 3 close to the head surface 1a, and the abrasive tape 3 is pulled out from the pull-out rollers 12a and 12b.
The polishing tape 3 is continuously transported at a predetermined speed.

As an example, a rough machining process and a finishing process will be explained separately.

Rough machining process The shaking motor 25 is continuously rotated to shake the crank plate 19 evenly left and right by the crank mechanism via the connecting rod 21, and the head support base 2 is shaken via the swing cylinder 16. Then, the head 1 is rotated and oscillated in the front and back direction of the abrasive tape transport direction P, with the abrasive tape transport orthogonal axis Y in the left-right direction perpendicular to the abrasive tape transport direction P as the rotation and oscillation axis.

Due to this rotational movement, one opposing edge corner 1b of the rectangular head surface 1a comes into sliding contact with the abrasive tape 3, and this sliding contact causes one opposing edge corner 1b
b is roughly chamfered.

After chamfering the opposing edges 1b, the engagement rod 44 is removed from the V-shaped notch groove 42, the rotation motor 39 is rotated 90 degrees, and the head 1 is rotated 90 degrees.
The engaging protrusion 44 is recessed into the V-shaped notch groove 42, and the head position is fixed at that position, and the crank disk 19 and the rotary pulley 38 are connected.

This causes the rotary pulley 38 to swing and rotate so that the head 1 is forcibly rotated during swinging due to the engagement between the main bevel gear 30 and the subordinate bevel gear 33.
This is also to prevent this by rotating the main bevel gear 30.

Then, the oscillating motor 25 is continuously rotated again to cause the head 1 to rotate and oscillate.

Through this rotational movement, the other opposing edge corners 1b are brought into sliding contact with the abrasive tape 3, and the other opposing edges 1b are roughly chamfered, and the rough machining is completed as shown in FIG. .

Finishing process The polishing tape 3 is transferred, the shaking motor 25 is rotated, and the rotation motor 39 is continuously rotated.

As shown in FIG. 7, the rotation of the swing motor 25 swings the swing cylinder 16 that covers the head rotation mechanism B without transmitting driving force to the head rotation mechanism B such as the slave bevel gear 33. The head 1 rotates around the abrasive tape transport orthogonal axis Y, which is approximately parallel to the head surface 1a and perpendicular to the abrasive tape transport direction P, and rotates the head 1 in the abrasive tape transport direction P. The head surface center normal axis It will rotate continuously as the rotation axis.

By this continuous rotation of the head 1, the roughly chamfered edge corner 1b is also chamfered from an oblique direction, and furthermore, one edge corner 1b and the other edge corner 1
The four corners where b intersects are also chamfered, and as shown in FIG. 2, the remaining flat surfaces are chamfered to form an oval oval shape, and the finishing process is completed.

After going through these rough machining processes and finishing machining processes,
All edge corners 1b of the head surface 1a of the head 1 are chamfered, and the head 1 is taken out together with the support base 2.
The head support base 2 with the new head 1 is installed, and the above-described operations are repeated again.

Note that the invention is not limited to this embodiment; for example, the rotation motor 39 for indexing or continuous rotation of the head 1 may be directly connected to the rear end of the rotating shaft 28 without using a belt or the like. The rotary shaft 28 may be directly rotated and indexed, or the head 1 may be indexed and rotated by rotating the rotation motor 39 in forward and reverse directions.

Furthermore, if the head support 2 of the head 1 has a specific mounting direction, the head support 2 must be returned to its original position; in that case, two V-shaped notch grooves 42 may be used. be.

Further, the abrasive tape 3 may be subjected to rotary oscillating motion and linear reciprocating motion at the same time.

〔Effect of the invention〕

As described above, in the present invention, an abrasive tape is stretched over a head surface of a head for a predetermined length approximately parallel to the head surface and brought close to the head, and the abrasive tape is rolled approximately parallel to the head surface by a winding and transporting device. The head is rotated back and forth in the abrasive tape transport direction using an abrasive tape transport orthogonal axis that is substantially parallel to the head surface and orthogonal to the abrasive tape transport direction as a rotation and swing axis. , and the head is rotated continuously or intermittently about an axis normal to the center of the head surface in a direction perpendicular to the abrasive tape transport direction and orthogonal to the orthogonal abrasive tape transport axis, so that all sides of the head surface are rotated continuously or intermittently. R the edge corner
Since chamfering is performed, if a head is supplied manually or automatically, the four edge corners can be chamfered completely at high speed and continuously as shown in Fig. 1.
Only one operator is required and the head can be chamfered extremely efficiently.

Furthermore, chamfering is performed by transporting the abrasive tape, rotating the head, and rotating the head.
Due to the complex cooperative action, the chamfered surface becomes an extremely smooth surface, and the opposing edge corners have the same chamfered shape, resulting in a more uniform chamfered surface and improved surface accuracy. It also means that machining can be done.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. 2 is a product drawing, FIG. 3 is a partial rear view, FIG. 4 is a partial front view, and FIG. 5 is an explanation. figure,
FIG. 6 is an explanatory diagram of the roughing process, and FIG. 7 is an explanatory diagram of the finishing process. A... Head rotation and swing mechanism section, B... Head rotation mechanism section, P... Abrasive tape transfer direction, X... Head surface center normal axis, Y... Axis perpendicular to the abrasive tape transfer direction, 1... Head, 1a...Head surface, 1b...
. . . edge corner, 2 . . . head support, 3 . . . abrasive tape, 4 . . . winding transfer device.

Claims (1)

[Claims] 1. An abrasive tape is stretched over a head surface of the head for a predetermined length approximately parallel to the head surface and brought close to the head,
This abrasive tape is continuously transported approximately parallel to the head surface by a winding and transporting device, and the abrasive tape transport orthogonal axis, which is approximately parallel to the head surface and orthogonal to the abrasive tape transport direction, is used as the rotation axis. The head is rotated back and forth in the abrasive tape transport direction, and the axis normal to the center of the head surface, which is orthogonal to the abrasive tape transport direction and orthogonal to the orthogonal abrasive tape transport axis, is the rotation axis. As a result, the head is rotated continuously or intermittently,
An automatic R-chamfer polishing method for a flexible disk head, characterized in that all edge corners of the head surface are R-chamfered. 2. A head support base that supports the head, an abrasive tape that is stretched over a predetermined length almost parallel to the head surface of the head and brought close to it, and the abrasive tape is wound around the head surface and continuously transported in parallel. The head support is rotated in the front-rear direction of the abrasive tape transport direction, with the abrasive tape transport orthogonal axis, which is substantially parallel to the head surface and orthogonal to the abrasive tape transport direction, as the rotating and oscillating axis. a head rotation movement mechanism for rotating the abrasive head; and a head support base with the head surface center normal axis in a direction perpendicular to the abrasive tape transport direction and orthogonal to the abrasive tape transport axis as the rotation axis. An automatic R-chamfer polishing device for a flexible disk head, comprising a head rotation mechanism that rotates continuously or intermittently.