JPS6133663B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention improves the precision of lens-like objects and similar objects that require precision on both sides, such as small-diameter crystal oscillation elements, etc., and reproduces these products with high precision. The purpose of the present invention is to obtain a manufacturing method that allows the raw material to be held in one attachment/detachment device, and in that state, processes one side of the raw material around the reference central axis, and then attaches a flexible material to the processed surface. A chip is attached, a tapered surface or a spherical surface whose center is on the machining center line is machined on this machinable piece, and then the machine is attached to the other attachment/detachment device with the machining center line aligned with the reference center axis. The present invention relates to a method for producing lens-like objects and similar products, characterized in that the raw material is delivered while holding the chips, and then the other side of the raw material is processed around the reference central axis.

The accuracy of conventional lenses, crystal oscillation elements, etc. is not only difficult to obtain because errors accumulate as the diameter becomes smaller, but also have poor reproducibility, making it difficult to mass-produce lenses with uniform accuracy. The present invention is a highly accurate and reproducible manufacturing method, which involves spherical machining of a machinable piece attached to the machined surface of a raw material. Since it is possible to align the lines (center lines of curvature) without going out of order, it is sufficient to hold the machinable piece when processing the other side of the raw material around the center line. Not only can the diameter of the machined surface be made infinitely small, but also because the two center lines coincide, a high degree of double-sided machining precision can be obtained and that precision can be reproduced.

In other words, when polishing without attaching a machinable piece, the dimensions of the device must first be extremely small. In particular, the error with respect to the axis of the attachment/detachment device increases in inverse proportion to the dimensions, making it difficult to perform high-precision machining. It becomes difficult. By attaching machinable pieces with large dimensions, it is possible to process small dimensions without reducing the size of the equipment, and even if the workpiece becomes smaller, the accuracy with respect to the axis can be maintained. , remains exactly the same as when machining workpieces with large dimensions. To explain this with reference to the drawings, the precision with respect to the axis of the workpiece having a diameter d in FIG. 8 is the same as the precision with respect to the axis having a diameter x produced by machining a machinable piece.

To explain the embodiment of the present invention shown in the drawings, a cylindrical core is obtained by grinding a crystal with a hollow rotary grinder in a direction perpendicular to its oscillation surface 1, and a core 2 is formed. The diameter of the lead 2 can be about the size of a pencil lead depending on the size of the hollow rotary grinder. A synthetic resin (mixed with a solvent and a curing agent) is applied to the outer peripheral surface of the core 2 thus collected, and the outer peripheral surface is surrounded by a machinable material 3 formed by curing the synthetic resin layer to form a solid cylinder. do. In this enclosing step, the outer circumferential surface 3' of the solid tube and the outer circumferential surface 2' of the core 2 are formed parallel to each other, and the crystal vibrating element raw material 4 is manufactured. The raw material 4 may be shaped like a short pencil as shown in FIGS. 1 and 2, or it may be cut along a slicing line 5 at right angles to the direction of the core 2 to form a plate.

The raw material 4 thus formed is held by one of the attachment/detachment devices 6, and the grinding machine 7 and the polishing machine 8 can mirror-polish the machinable material 3 and the core 2 into the same processed spherical surface 9. Next, on this mirror-polished surface, a synthetic resin as described above is applied and hardened, or a machinable piece 11 is fixed with an adhesive 10, and a sixth
As shown in the figure, the spherical surface 11' is polished by the polishing disk 8.
The same spherical surface 11' is attached to the other suction attachment/detachment device 1.
2, the machinable piece 11 is held by suction as shown in FIG. Of course, the curvature and center of machining curvature of both mirror-polished surfaces 9', 9' of core 2 coincide with symmetrical positions, and the center of machining curvature coincides with the reference center line common to the front and back surfaces. Thereafter, the front and back mirror-polished cores (crystal vibrating elements) 13 attached to the machinable piece 11 having both mirror-polished surfaces are separated from the machinable piece 11 using a solvent to produce a product.

Since the present invention is based on the above-described method, the center of curvature of the spherical surface 11' formed on the machinable piece 11 coincides with the reference central axis, that is, the central axis of the machined surface 9, so that the raw material 4 and the machinable piece 11 are The spherical surface 1 of the cuttable piece 11 is transferred from the attachment/detachment device 6 to the other attachment/detachment device 12
1' is supported by the same device 12, and the processing center of the processed surface 9 of the delivered raw material 4 and the spherical surface 11' of the machinable piece 11 can be easily aligned with the reference center axis without error.
Not only can the symmetrical accuracy between both sides of 3 and around the reference center line be significantly improved, but also the size of the product 13 can be miniaturized because it is processed through the machinable piece 11, and uniform high-precision reproduction and mass production can be achieved. There is a potential effect.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the raw material manufactured by the manufacturing method of the present invention, FIG. 2 is a right side view of the raw material, FIG. 3 is a plan view of the raw material before grinding, and FIG. 4 is a plan view of the raw material in the polished state. Figure 5 is a plan view of the bonded part of the machinable piece before grinding.
FIG. 6 is a plan view of the machinable piece in the polished state, FIG. 7 is a plan view of the state before the raw material with the machinable piece is transferred to the suction attachment/detachment device and ground, and FIG. 8 is an enlarged plan view of the polished state. FIG. 9 is a longitudinal cross-sectional view of the machinable piece after polishing the crystal vibrating element. 6, 12...Attachment/detaching device, 4...Raw material, 9...
Machining surface, 11'...spherical surface.

Claims (1)

[Claims] 1. Hold the raw material in one attachment/detachment device, and in that state process one side of the raw material around the reference center axis, then attach a machinable piece to the machined surface, and make the machinable piece have a center on the machining center line. The spherical surface is machined, and the machining center line is aligned with the reference center axis, and the other attachment/detachment device holds the machinable piece and the raw material is delivered, and then the other side of the raw material is aligned with the reference center axis. A method for manufacturing a lens-like object and its analogues, characterized by processing mainly.