JPS6231232Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotating holding device for a disc-shaped workpiece that holds the workpiece during mirror polishing of the disc-shaped workpiece, which facilitates attachment and detachment of the workpiece and improves production efficiency. , it is an object of the present invention to enable the workpiece to be rotated with high precision.

Generally, when mirror-finishing a disc-shaped workpiece such as a magnetic disk used in computer memory, etc., the workpiece is held by a holding device, and at the same time, the workpiece is rotated and a diamond cutting tool is used to polish the workpiece. A high-quality mirror-finished surface with a surface roughness of 0.01 μmRa or less is formed on the workpiece by a method such as cutting or wrapping.

However, in order to ensure a surface roughness of 0.01μmRa or less, the cutting tool and the grinding wheel must be managed to prevent chipping of the tips of the teeth or clogging of the grinding tool, which is extremely troublesome. There is a drawback.

Therefore, mirror finishing is performed using a mirror finishing apparatus as shown in FIG. That is, in the figure, 1 is a donut-shaped disk-shaped workpiece made of aluminum held by a rotating jig 2, 3 is a tool whose tip has a U-shaped cross section, and 4 is the left and right sides of the tip of tool 3. The abrasive material holder 5 is attached to the inner surface of both holders 4 and is a water-permeable flexible abrasive material with abrasive grains attached, and both abrasive materials 5 are arranged symmetrically. ing. 6 is a machining fluid 7 formed by penetrating the tip of the tool 3 and both holders 4, respectively.
The surface tension of processing fluid 7 is 60 dyn/cm.
and has the function of suppressing surface oxidation of aluminum materials.

Then, the workpiece 1 is rotated by the jig 2, and the abrasive material 5 arranged symmetrically on both sides of the workpiece 1 is pressed, and the machining fluid 7 is passed from the supply channel 6 through the abrasive material 5 onto the surface of the workpiece 1. The workpiece 1 is mirror-finished by moving the abrasive 5 together with the tool 3 in one direction or in a reciprocating direction perpendicular to the rotation axis of the jig 2.

Therefore, while surface oxidation of the aluminum material that is the workpiece 1 is suppressed by the machining fluid 7, minute cuts are made by the abrasive grains attached to the abrasive material 5, and the scraped machining debris is made to have water permeability. Since it is discharged through the abrasive material 5, clogging of the abrasive material 5 is suppressed, and since the flexible abrasive material 5 has elasticity, vibrations of the workpiece 1, tool 3, etc. are absorbed, and the workpiece caused by vibrations is The distribution of surface roughness and the amount of processing can be made uniform over the entire surface.

By the way, in order to obtain a high-quality mirror surface with a surface roughness of 0.01 μmRa or less, it is of course important to suppress clogging of the abrasive material 5, and in addition to this, it is important to hold the workpiece 1 with high precision. In the case of the device shown in Fig. 1, the workpiece 1 is
Although the workpiece 1 is held accurately without wobbling during rotation, the workpiece 1 cannot be easily attached or detached, resulting in a low production efficiency.

This invention was made with the above points in mind, and includes a positioning collar that is integrally provided on the outer periphery of a shaft-shaped rotation jig, and a shaft that extends from the end surface of the jig to the surface of the jig. a positioning groove formed on the surface of the jig in communication with the guide groove in a direction substantially perpendicular to the guide groove and having an engagement recess on an end surface side of the jig; a positioning ring that is slidably and rotatably fitted to the jig and clamps a donut-shaped disc-shaped workpiece fitted to the jig between the collar; and a positioning ring that is provided on the inner surface of the ring so as to protrude inward. a protrusion that passes through the guide groove when sliding the ring fitted to the jig and passes through the positioning groove when rotating; The present invention provides a rotation holding device for a disc-shaped workpiece, comprising a spring that positions the ring by engaging the ring with the engagement recess of the positioning groove.

Therefore, according to the holding device for rotation of a disc-shaped workpiece of this invention, the disc-shaped workpiece fitted to the rotation jig is slidably and rotatably fitted to the positioning collar of the jig and the jig. In addition to being able to hold the workpiece between the assembled positioning ring and the protrusion of the ring engaging the engagement recess of the positioning groove, the workpiece can be stably held, allowing highly accurate rotation of the workpiece. In addition, the ring can be slidably and rotatably guided by passing the protrusion of the ring through the guide groove and positioning groove of the jig, making it easy to attach and detach the ring, making the work easier. Objects can be easily attached and detached, and therefore production efficiency can be significantly improved when mirror-finishing a workpiece.

Next, this idea will be described in the second section showing one embodiment of the invention.
This will be explained in detail with reference to the drawings below.

In these drawings, reference numeral 8 indicates a rotation jig in the form of a shaft in the left-right direction, reference numeral 9 indicates a positioning collar integrally provided on the outer periphery of a part of the jig 8, and reference numeral 10 indicates a positioning collar provided on the surface of the jig 8. This is a guide groove formed in the axial direction from the right end surface of
It is formed on the right end side of the jig 8 to a position separated by the sum of the thickness of the disk-shaped workpiece to be described later and 1/2 the width of the positioning ring to be described later. 11 is formed on the surface of the jig 8 in a direction substantially perpendicular to the guide groove 10, that is, in a direction slightly inclined toward the collar 9 from the direction perpendicular to the guide groove 10, so as to communicate with the guide groove 10. The first positioning groove 11 is located at the tip of the guide groove 10, and the second, third, and fourth positioning grooves 11 are located at the first positioning groove 10. They are formed in order from the groove 11 at positions separated by a distance equal to the sum of the thickness of the workpiece and the width of the ring. Reference numeral 12 denotes an engagement recess formed on the right side of the tip of each positioning groove 11 so as to communicate with each other.

Reference numeral 13 denotes a donut-shaped disk-shaped workpiece, such as a magnetic disk, whose both sides are mirror-finished at the same time, and is fitted into the jig 8 from the right end.

Reference numeral 14 denotes a positioning ring that is slidably and rotatably fitted into the jig 8 from its right end, and has flanged clamping edges 15 integrally formed on the outer periphery of both ends.
Reference numeral 16 denotes a sliding hole which is opened at the center of the outer circumference of the ring 14 and is elongated in the axial direction, that is, the width direction of the ring 14; A communicating hole formed by
Reference numeral 8 denotes an attachment/detachment slide button that is loosely fitted into the slide hole 16 so as to be slidable in the longitudinal direction, and 19 is a protrusion that is provided on the inner surface of the ring 14 so as to protrude inward and is integrated into the slide button 18 through the communication hole 17. and the protrusion 19
is slidable together with the slide button 18, and when the ring 14 fitted to the jig 8 slides, the protrusion 19 passes through the guide groove 10 and when rotated, it passes through the positioning groove 11. 20 is installed in the sliding hole 16 and urges the protrusion 19 to the right side, that is, to the right end surface side of the jig 8 via the slide button 18, so that the protrusion 19 is pushed into the engagement recess 1.
2.

When fixing the workpiece 13 to the jig 8 during mirror finishing of the workpiece 13, the workpiece 13 is first fitted from the right end of the jig 8, and one surface of the workpiece 13 is brought into contact with the collar 9. let Next, the ring 14 is fitted into the jig 8, its protrusion 19 is fitted into the guide groove 10, and the ring 14 is slid toward the collar 9 while moving the protrusion 19 along the guide groove 10. The workpiece 13 is held between the collar 9 by coming into contact with the other surface of the workpiece 13. At this time, the protrusion 19 of the ring 14 is positioned to the right of the first positioning groove 11 due to the bias of the spring 20, so the slide button 18 is then moved toward the collar 9 against the spring 20. While rotating the ring 14, the protrusion 19 is passed through the first positioning groove 11, and further, the operation of the slide button 18 is released and the protrusion 19 is engaged with the engagement recess 12 by the bias of the spring 20. . Therefore, the ring 14 is restrained not only from rotating but also from sliding, and the workpiece 13 is firmly held between the collar 9 and the ring 14 by the bias of the spring 20.

Furthermore, when holding the second workpiece 13 on the jig 8, the right side clamping edge 15 of the first ring 14 becomes a collar integrated with the jig 8. 13, the second ring 14 is fitted to the jig 8 in the same way as described above, and its projection 19 is engaged with the engagement recess 12 of the second positioning groove 11. The workpiece 13 is held between the holding edges 15 of the first and second rings 14, and the third and fourth workpieces 13 can be similarly held as shown in FIG.

Next, when the mirror finishing of the workpiece 13 is completed and it is to be removed, first move the slide button 18 of the ring 14 to the collar 9 side against the spring 20,
After the protrusion 19 is disengaged from the engagement recess 12, the ring 14 is rotated in the opposite direction to that described above, and the protrusion 19 is moved through the positioning groove 11 to the guide groove 10. Therefore, when the ring 14 is slid to the right end side of the jig 8 by passing the protrusion 19 through the guide groove 10,
The ring 14 can be removed from the jig 8, and the workpiece 13 can also be removed.

Therefore, according to the embodiment, the ring 14
By attaching and detaching the workpieces 13 to and from the jig 8, it becomes easy to attach and detach the workpieces 13, improving production efficiency.Furthermore, in the above case, since four workpieces 13 can be held at the same time on the jig 8, the workpieces 13 can be easily attached and detached. Mirror finishing of the object 13 can be carried out sequentially while moving the jig 8 in the axial direction or while moving the processing device, and production efficiency can be greatly improved. Furthermore, since the workpiece 13 held by the jig 8 is firmly held between the collar 9 and the ring 14 or between adjacent rings 14, highly accurate rotation of the workpiece 13 can be realized.

[Brief description of the drawings]

Figure 1 shows a general mirror finishing device, Figure a is a front view, Figure b is a side view, Figure 2 and the following drawings show one embodiment of the rotating holding device for a disc-shaped workpiece of this invention. FIG. 2 is a perspective view, FIGS. 3 a and b are a front view and a partial side view of the rotation jig, and FIGS. 4 a and b are a front view and a partial side view of the positioning ring, and FIG. FIG. 5 is a plan view taken along line A-A' in FIG. 4a. 8...Rotation jig, 9...Positioning collar, 10
... Guide groove, 11 ... Positioning groove, 12 ...
Engagement recess, 13... Disc-shaped workpiece, 14... Positioning ring, 19... Protrusion, 20... Spring.

Claims (1)

[Scope of utility model registration request] a positioning collar integrally provided on the outer periphery of a shaft-shaped rotation jig; a guide groove formed on the surface of the jig in the axial direction from the end surface of the jig; a positioning groove that is formed in communication with the guide groove in a direction substantially perpendicular to the guide groove and has an engagement recess on the end face side of the jig; and a positioning groove that is slidably and rotatably fitted into the jig; a positioning ring that holds the donut-shaped disc-shaped workpiece between the collar and the ring; and a positioning ring that is provided on the inner surface of the ring so as to protrude inward and is fitted to the jig, and that guides the ring when the ring is slid. a protrusion that passes through the positioning groove as well as the positioning groove during rotation; the protrusion is urged toward the end face side of the jig, and the protrusion is engaged with the engagement recess of the positioning groove; A holding device for rotating a disc-shaped workpiece, which is equipped with a spring that positions the workpiece.