JP2002205252A - Working method for sphere and jig therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To polish a spherical work with high sphericity using a general-purpose surface polishing machine without introducing a V polishing machine. SOLUTION: A fixture 31, which is mounted with a V-abrasive disk 33, having V-grooves 34 formed on its circumference, attached on the bottom surface of a guide ring 32, is mounted on an abrasive disk 11 of a general-purpose surface polishing machine, with its movement regulated in the circumference direction. A peripheral speed difference acting upon by rotating the abrasive disk 11 rotates the V-abrasive disk 33. A plurality of works 16 are disposed at the V-grooves 34 on the V-abrasive disk 33, and an upper abrasive disk 15 is mounted on the tops of the workpieces 16. The workpieces 16 are supported at three points, thereby conducting polishing with high sphericity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for performing spherical polishing of a spherical workpiece and a jig used in the method.

[0002]

2. Description of the Related Art For example, in polishing a single crystal sphere made of a ferrimagnetic material such as a YIG (yttrium iron garnet) sphere used in a magnetic resonator, the material is hard and brittle so that processing strain does not remain. Therefore, a method of performing spherical polishing using a polishing machine has been adopted. FIG. 3 shows a configuration using a plane polisher as a conventional example of polishing such a spherical workpiece.

A guide ring 12 mounted on the periphery of a polishing machine (lower polishing machine) 11 has a cylindrical shape, and its outer peripheral surface is supported by a support arm 13. The support arm 13 includes an arm portion 13a extending from a housing (not shown), an arc-shaped support portion 13b attached to a tip of the arm portion 13a, and bearings 13 attached to both ends of the support portion 13b.
c, and both bearings 13c are
And the outer peripheral surface is contacted. Guide ring 1
2 is rotatable (rotatable) on the polishing plate 11 by being supported by such a support arm 13.
Further, with the rotation of the polishing board 11, the circumferential movement of the polishing board 11 is restricted so as not to move in the rotating direction.

[0004] A disc-shaped carrier 14 and an upper polishing machine (loading machine) 15 are accommodated in the guide ring 12. On the periphery of the carrier 14, for example, six accommodation holes 14a
Are formed at equiangular intervals, and workpieces 16 to be polished are movably arranged in the accommodation holes 14a. The upper polishing machine 15 is mounted on these workpieces 16, and a required load is applied to each workpiece 16 by the upper polishing machine 15. In the planar polishing machine having the above-described configuration, when the polishing disk 11 is rotated, the carrier 14 holding the guide ring 12 and the workpiece 16 is rotated on the polishing disk 11 (rotation) by the difference in peripheral speed acting on the polishing disk. And
Since the workpiece 16 moves while rolling while being sandwiched between the polishing board 11 and the upper polishing board 15, the surface thereof is polished. At this time, the support arm 13 is indicated by an arrow 17.
Reciprocating motion is performed as shown in FIG. In the figure, reference numeral 18 denotes a rotating shaft for rotating the polishing machine 11.

[0005]

By the way, in the polishing process using the above-mentioned plane polishing machine, the spherical workpiece 16 is supported at two points by the polishing disk 11 and the upper polishing disk 15. Therefore, there is a problem that the workpiece 16 tends to have a so-called triangular shape with the progress of the polishing process, and a sphere having good sphericity cannot be obtained. On the other hand, as a method of obtaining a sphere having good sphericity in the polishing process, there is a method of using a V polishing machine having a configuration as shown in FIG.

In this V polishing machine, an upper polishing disk 21 and a lower polishing disk 22 called a so-called V polishing disk are arranged to face each other. Groove 23
Are formed. The upper polishing plate 21 and the lower polishing plate 22 are mounted and supported on rotating shafts 24 and 25, respectively. The upper polishing plate 21 and the rotating shaft 24 are movable, for example, in the vertical direction, and apply a required load. It has a structure that can be added. In this V polishing machine, a required number of workpieces 16 are arranged in V grooves 23, and
6 and the upper polishing plate 21 is brought into contact with a load,
By rotating the upper polishing plate 21 and the lower polishing plate 22 in, for example, opposite directions, the workpiece 16 moves while rolling on the V-groove 23, whereby the workpiece 16 is polished. At this time, since the workpiece 16 has a structure supported at three points, a sphere having good sphericity can be obtained.

[0007] If a V grinder is used as described above, a ball with good sphericity can be obtained. However, for that purpose, a new V grinder must be introduced, and the introduction cost and burden are increased. It was big. In view of this problem, an object of the present invention is to introduce a new V polishing machine without introducing a new V polishing machine.
It is an object of the present invention to provide a ball processing method that can obtain a sphere having good sphericity by using a general-purpose surface polishing machine, and to provide a jig used for the method.

[0008]

According to the first aspect of the present invention, a plurality of spherical workpieces are arranged in a V-groove of a V-grinding machine having a V-groove formed on a circumference thereof. In the processing method of performing the spherical polishing of the workpiece by mounting the upper polishing machine on the upper polishing machine and rotating the V polishing machine relatively to the upper polishing machine, the V polishing machine is mounted on the bottom surface of the cylindrical guide ring. The guide ring is mounted on the periphery of the polishing machine of the plane polishing machine with its movement in the circumferential direction regulated. By rotating the polishing machine, the peripheral speed acting on the V polishing machine is fixed. By the difference, the rotation of the V polishing machine for performing the spherical polishing is obtained.

According to the second aspect of the present invention, the movement of the polishing machine in the circumferential direction is regulated by the supporting arm on the periphery of the rotating polishing machine of the plane polishing machine, and the support is rotatably supported and mounted. A jig having a structure rotating on a polishing machine by a peripheral speed difference caused by rotation is composed of a cylindrical guide ring and a V polishing machine attached and fixed to the bottom surface of the guide ring. The inner surface is provided with a V-groove formed on the circumference.

[0010]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view showing a configuration of an embodiment of a ball processing jig according to the present invention. In this example, the jig 31 is a cylindrical guide ring 3.
2 and a V polishing machine 33 attached and fixed to the guide ring 32. The V polishing machine 33 has a V groove 34 formed on the circumference.
The inner surface of the guide ring 32 is formed on the bottom surface of the guide ring 32 so as to cover the opening.

The jig 31 configured as described above is shown in FIG.
As in the case of the guide ring 12, the support arm restricts the movement in the circumferential direction and is supported rotatably (rotatably) on the periphery of the polishing plate of the plane polishing machine. FIG. 2A shows a state in which this jig 31 is mounted on the periphery of a polishing plate of a flat surface polishing machine,
Parts corresponding to those in FIG. 3 are denoted by the same reference numerals. When the polishing machine 11 is rotated, the jig 31 supported by the support arm 13 rotates on the polishing machine 11 due to a difference in peripheral speed acting on the V polishing machine 33. Therefore, the required number of spherical workpieces 16 to be polished are arranged in the V-grooves 34 as shown in FIG. 2B, and the upper polishing plate 15 is loaded on the workpieces 16 and a required load is applied. Then, the workpiece 16 is subjected to spherical polishing.

Since the workpiece 16 is supported at three points by the V-groove 34 and the upper polishing plate 15, a sphere having good sphericity can be obtained. That is, by adopting such a processing method, Spherical workpiece 16
Can be polished. 2A, reference numeral 35 denotes a polishing liquid supply pipe fixed to the support arm 13,
The polishing liquid is supplied into the jig 31 through the polishing liquid supply pipe 35. Note that the V polishing machine 33 rotates relatively favorably with respect to the upper polishing machine 15 and
It is preferable that the upper polishing plate 15 be fixed so that the upper polishing plate 15 can be satisfactorily rolled on the V groove 34, that is, the upper polishing plate 15 does not rotate in conjunction with the rotation of the V polishing plate 33. Although not shown in the drawing, the fixing can be performed by using the support arm 13.

[0013]

As described above, according to the ball machining method according to the present invention, a spherical work piece can be obtained with good sphericity using a general-purpose plane grinder without newly introducing a V grinder. Spherical polishing can be performed. Further, according to the ball processing jig according to the present invention, it is possible to easily perform the spherical polishing using the above-mentioned plane polishing machine.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a ball processing jig according to the present invention.

FIG. 2 is a diagram for explaining a ball machining method according to the present invention.

FIG. 3 is a view for explaining a conventional ball processing method using a plane polishing machine.

FIG. 4 is a view for explaining a conventional ball processing method using a V polishing machine.

Claims (2)

[Claims] 1. The V of a V polishing machine having a V groove formed on the circumference.
A plurality of spherical workpieces are arranged in the grooves, an upper polishing machine is mounted on the workpieces, and the V polishing machine is rotated relative to the upper polishing machine to thereby obtain a spherical surface of the workpiece. A polishing method in which the V polishing machine is attached to and fixed to the bottom surface of a cylindrical guide ring, and the guide ring is placed on the periphery of the polishing machine of a flat-surface polishing machine while regulating the movement in the circumferential direction. A ball processing method comprising: mounting and rotating the polishing machine to obtain the rotation of the V polishing machine for performing the spherical polishing by a peripheral speed difference acting on the V polishing machine. 2. On the periphery of a rotating polishing machine of a plane polishing machine,
A jig having a structure in which its movement in the circumferential direction is regulated by a support arm, and is rotatably supported and mounted, and is configured to rotate on the polishing board by a difference in peripheral speed acting by rotation of the polishing board; A V-shaped polishing ring attached to and fixed to the bottom surface of the guide ring, wherein the V-shaped polishing disk is provided with a V-shaped groove formed on the inner surface of the V-shaped polishing ring. Jig for ball processing.