JP5451262B2 - Bevel processing method - Google Patents

Description

  The present invention relates to a bevel processing method for performing bevel processing on a crystal piece.

Conventionally, a metal cylindrical container such as iron has been used when bevel processing is performed on a quartz crystal piece that is a piezoelectric material. This metal container, i.e., the beveling cylinder, is composed of a cylindrical body with a bottom and one opening and a lid that closes the opening. Is this cylinder and the lid integral with each other? The lid is fixed to the cylindrical body with bolts or the like (see, for example, Patent Document 1 and Patent Document 2).
When beveling a crystal piece, the lid is fixed to the cylinder with the abrasive and the crystal piece placed in the cylinder, and the piezoelectric piece is beveled by rotating around the central axis of the cylinder. Was.

In such a conventional bevel processing, when the center axis of the cylindrical body is rotated about the rotation axis, the internal abrasive is caused to flow along the inner surface of the cylindrical body, and the cylindrical body is formed at a predetermined height. It has come to fall down away from the inner surface of the.
As a result, the crystal piece sealed together with the abrasive is polished with the surface of the cylinder and the abrasive while repeating inversion inside and outside the cylinder.

  Here, in order to improve the accuracy of bevel processing of a crystal piece and shorten the processing time, a beveling cylinder in which diamond abrasive grains are provided on the inner surface of a cylindrical body has been proposed (for example, see Patent Document 3). In the bevel processing using this beveling cylinder, abrasive material is enclosed in the beveling cylinder together with the crystal piece, and the beveling cylinder is rotated to slide the internal crystal piece on the inner surface of the beveling cylinder. Done. As a result, the abrasive is sandwiched between the edge portion of the crystal piece and the inner surface of the beveling cylinder, and the edge portion of the crystal piece is scraped. The quartz crystal piece falls while being reversed when the quartz piece moves to a predetermined height on the inner surface by the rotation of the beveling cylinder, and the opposite surface is beveled. By repeating this, bevel processing is performed on both sides of the crystal piece.

JP 2001-285000 A (paragraphs 0002 to 0005, FIG. 6) JP 2008-166971 A JP 20022244943 A

  However, in the conventional bevel processing method, clogging occurs due to the scraped pieces of the crystal pieces sandwiched in the gaps between the diamond abrasive grains provided on the inner surface of the beveling cylinder, and the crystal pieces can be uniformly beveled. could not.

  Therefore, an object of the present invention is to solve the above-described problems and provide a bevel processing method for performing uniform bevel processing on a crystal piece.

In order to solve the above-mentioned problems, the present invention is a bevel processing method for performing bevel processing on a crystal piece, a cylindrical body having a diamond opening on the inner surface and having one end open, and an open end of the cylindrical body Only a plurality of crystal pieces and water in an amount of 80% by volume to 90% by volume with respect to the volume of the beveling cylinder are put in a beveling cylinder including a lid and a lid that is closely fixed. The quartz piece is beveled by rotating the cylindrical body about a central axis passing through the center of a circle of the cylindrical body as a rotation axis.

According to such a bevel processing method, since liquid material enters the gaps between the diamond abrasive grains, it becomes difficult for particles and abrasives such as crystal chips shavings to remain and prevent clogging in the gaps between the diamond abrasive grains. be able to.
Further, by using water for the liquid material, the liquid material becomes a single liquid, and clogging of the gaps between the diamond abrasive grains can be further prevented.

It is a conceptual diagram which shows an example of the cylinder for beveling which concerns on embodiment of this invention. It is a conceptual diagram which shows an example of the usage example of the cylinder for beveling which concerns on embodiment of this invention.

  Next, the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the drawings as appropriate. Note that each component is exaggerated for easy understanding of the state.

  FIG. 1 is a conceptual diagram showing an example of a beveling cylinder according to an embodiment of the present invention. FIG. 2 is a conceptual diagram showing an example of a usage example of the beveling cylinder according to the embodiment of the present invention.

  As shown in FIG. 1, a beveling cylinder 10 used in a bevel processing method according to an embodiment of the present invention includes a cylindrical body 11 having a bottom and one opening, and a lid 12 fixed to the opening end. It consists of and.

  The beveling cylinder 10 encloses a liquid material M and a crystal piece B, which is a piezoelectric piece, and rotates the center axis C1 of the beveling cylinder 10 as a rotation axis to bevel the crystal piece B. It is designed to be processed. The central axis C1 of the beveling cylinder 10 refers to a straight line connecting the center of the circular opening and the center of the circular bottom in the beveling cylinder 10. In other words, the central axis C1 of the beveling cylinder 10 refers to a straight line that passes through the center of the beveling cylinder 10 in parallel with the longitudinal direction of the beveling cylinder 10.

The cylindrical body 11 is made of, for example, iron. The cylindrical body 11 has a cylindrical shape in which one end is closed and becomes a bottom, and the other end is opened with a predetermined diameter.
On the inner peripheral surface of the cylindrical body 11, diamond abrasive grains D are fixed by, for example, metal bonds.

Here, the diamond abrasive grains D having a particle size of 1000 to 3000 are used. For example, if diamond abrasive grains having a particle size larger than 1000 are used, the crystal piece B is severely damaged due to the large particle size, and the beveled crystal piece B cannot be used as a product. Further, for example, when diamond abrasive grains having a particle size smaller than 3000 are used, it takes much time to complete the bevel processing to make the crystal piece B due to the small particle size, resulting in poor productivity.
Accordingly, the diamond abrasive grain D having a particle size of 1000 to 3000 can be beveled on the crystal piece B in an optimum state where the productivity is good and the crystal piece B is not damaged.

As shown in FIG. 2, the lid 12 is made of a metal such as iron and has the same diameter as the cylindrical body 11.
When the lid 12 is formed in a cylindrical shape, diamond abrasive grains D are provided on the inner surface.
Thereby, the crystal piece B located on the lid 12 side is also beveled, and variation in beveling due to a difference in position can be prevented.

Next, a bevel processing method according to an embodiment of the present invention will be described.
First, as shown in FIG. 1, a predetermined amount of water M as a liquid material and a plurality of crystal pieces B formed in a predetermined size are prepared.
Here, the amount of water M as a liquid material is 80% by volume to 90% by volume with respect to the internal volume of the beveling cylinder 10.

By setting the amount of water M as the liquid material to 80% by volume to 90% by volume, the crystal piece B can slide on the inner surface of the beveling cylinder 10.
That is, when the amount of water M as a liquid is less than 80% by volume, when the crystal piece B comes into contact with air, it may stick to the inner surface of the beveling cylinder 10 and beveling may not be temporarily performed. . In this case, variations occur in the degree of the entire bevel processing of the crystal piece B placed in the beveling cylinder 10.
Further, when the amount of water M as a liquid material is larger than 90% by volume, the crystal piece B cannot slide on the inner surface of the beveling cylinder 10 and beveling cannot be performed.
Therefore, the amount of water M as a liquid material is set to 80 vol% to 90 vol% with respect to the internal volume of the beveling cylinder 10, so that the crystal piece B can slide on the internal surface of the beveling cylinder 10. To do.

(Material sealing process)
The material enclosing step is a step in which the prepared water M and the plurality of crystal pieces B are placed in the cylindrical body 11 and the open end of the cylindrical body 11 is closed with the lid body 12.
The lid body 12 can be fixed to the opening side end of the cylindrical body 11 by a screwing type or a bolt.

(Rotation process)
The rotation step is a step of rotating the beveling cylinder 10 containing the water M and the crystal piece B around the central axis C1 of the beveling cylinder 10 as a rotation axis.
By this rotation process, the quartz piece B is polished by the diamond abrasive grains provided on the inner surface of the cylindrical body 10 while being contained in the water M, and the bevel processing proceeds. At this time, the beveling cylinder 10 is rotated using the cylinder rotating roller device 60 in a state where the central axis C1 is horizontal. Thereby, the quartz piece B contacts the diamond abrasive grain D while sliding on the inner peripheral surface of the cylindrical body, and bevel processing is performed.

The cylindrical rotating roller device 60 includes at least two pairs of rollers 61 provided horizontally, a first pulley 62 provided on a rotation shaft of the rollers 61, and a driving device 63 that rotates at a predetermined rotation speed. The second pulley 64 provided on the rotation shaft of the driving device 63 and the belt 65 hung on the first pulley 62 and the second pulley 64 are configured.
The cylindrical rotating roller device 60 configured in this way rotates the second pulley 64 provided on the rotation shaft of the driving device 63 by the driving device 63 and rotates the first pulley 62 via the belt 65. Then, the roller 61 is rotated.
As a result, the beveling cylinder 10 placed on the roller 61 is rotated with the central axis C1 being horizontal.

Thus, since the beveling cylinder 10 of the present invention is provided with the diamond abrasive grains D on the inner surface of the cylinder 11, the beveling of the crystal piece B can be performed without using an abrasive. Thereby, since the water M which is a liquid substance enters into the gaps between the diamond abrasive grains D, particles such as shavings of the crystal piece B are less likely to stay, and clogging of the diamond abrasive grains D into the gaps can be prevented. .
Moreover, since the bevel processing of the crystal piece B is performed with diamond abrasive grains, the work becomes easier than the bevel processing using an abrasive.

(Modification)
The beveling cylinder according to the embodiment of the present invention is provided by fixing diamond abrasive grains D provided on the inner surface of the cylinder 11 with a resin bond.
Thus, even if the diamond abrasive grain D is fixed by a resin bond, the same effects as those of the above-described embodiment are obtained.
Moreover, you may provide the diamond abrasive grain D by electrodeposition. Even if comprised in this way, there exists an effect similar to the said embodiment.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the cross section of the cylindrical body 11, the outer peripheral cross-sectional shape may be circular and the inner peripheral cross-sectional shape may be polygonal. Such a shape can be formed by firing a ceramic. In addition, when using ceramic for the cylindrical body 11, it is good to provide a diamond abrasive grain in the inner surface of the cylindrical body 11 by a metal bond or a resin bond.

10 Cylinder for beveling 11 Cylinder 12 Cover body B Crystal piece D Diamond abrasive grain M Liquid material (water)

Claims (1)

A bevel processing method for beveling a crystal piece,
The beveling accommodating cylinder comprising a lid one by being with a bottom provided diamond abrasive grains is closely fixed with the open end of the cylindrical body and the cylindrical body which is open to the inner surface, a plurality of crystal piece, the beveling Put only water in an amount of 80% to 90% by volume with respect to the volume of the cylinder for use ,
A bevel processing method, wherein the quartz piece is beveled by rotating the cylindrical body about a central axis passing through the center of a circle of the cylindrical body as a rotation axis.

Images