JPH02256451A - Convex polishing processing device - Google Patents

Abstract

PURPOSE:To automate convex processing by abutting a jig to which a a work-piece to be polished is stuck, to the top end of a shaft made movable in radial direction along a spherical surface as rotating an R-bowl made in a spherical surface on its inside peripheral wall with the spherical center acting as the rotational axis, and rotating the work-piece as bringing it in sliding contact with the R-bowl. CONSTITUTION:An R-bowl whose inside spherical wall is formed in spherical surface is turned around the spherical center by a drive shaft 11. An advance/retreat mechanism is provided on the spherical surface side of the R-bowl 1. A bed 12b swingable upward and downward and turnable in relation to a frame 12a is provided on the advance/retreat mechanism, and a slide head 12c making face advance/retreat by a cylinder 12d is provided on the bed 12b. Also, an arm 12e is provided on the head 12c, and together with a rotary shaft 12g provided on the top end part the center depressed part of a jig 13 to which a work-piece is stuck is abutted to the top end of the shaft 12g. Therefore, the work-piece is brought in sliding contact with the inside peripheral face of the R-bowl with suitable pressing force, together therewith being put in reciprocating motion. Accordingly convex polishing process can be automatically carried out in high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a convex polishing apparatus for polishing a polished workpiece such as a crystal piece into a convex lens shape.

(Technical background of the invention and its problems) For example, in a thickness vibration type crystal resonator, after cutting a raw stone at a predetermined angle with respect to the crystal axis, processing scratches and processing distortions on the surface layer are removed, and the desired Polishing to a predetermined thickness to obtain the resonant frequency, bevel processing to cut the edges into straight lines to roughly confine vibrations to the center of the plate surface, and process the plate surface into a lens-like curved surface. I try to apply convex processing.

However, when performing convex processing, for example, the third
As shown in the figure, while rotating the R plate l having a spherical inner wall, press the polished crystal piece 2 with your fingers, or attach it to the jig 3 with paraffin or the like.
Machining is performed by reciprocating in the radial direction between the periphery of 11 and the center. In this case, the abrasive material is mixed with an appropriate amount of water to give an appropriate amount.

However, in such a device, the crystal blanks 2 are processed one by one, resulting in low productivity, uneven quality, and increased costs.

(Object of the Invention) The present invention was made in view of the above circumstances, and an object of the present invention is to provide a convex polishing device that can automatically perform convex machining, has high productivity, and has less unevenness in quality. be.

(Summary of the Invention) The present invention rotates and drives the radius plate by extending a drive shaft from the outer wall in the direction of extension from the center of the spherical surface of the radius plate whose inner circumferential wall is formed into a spherical surface. A reciprocating mechanism is provided that moves forward and backward in the radial direction along the spherical surface of the rounded plate, a laminating jig is brought into contact with the tip of the shaft of this retracting mechanism, and the polishing is laminated on the front surface of this laminating jig. This method is characterized in that the workpiece is brought into sliding contact with the inner circumferential wall of the rounded plate and rotated to be polished.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to an overall perspective view shown in FIG. 1 and a front view of main parts shown in FIG. 2. Note that the same members as in FIG. 3 are given the same reference numerals and their explanations will be omitted.

In the figure, reference numeral 1 denotes a rounded plate, the inner circumferential wall of which is formed into a spherical surface, and a drive shaft 11 extending outward from the center of the spherical surface from the outer wall is provided for rotational driving.

Further, an advancing/retracting mechanism 12 is provided on the spherical side of the rounded plate l. This advancing/retracting mechanism 12 is provided with a bed 121) that can be elevated and rotated with respect to the pedestal 12a.
A sliding rod 12c is provided so as to be able to move forward and backward with respect to b. The rad 12c is moved forward and backward toward this slide by an air cylinder 12d.

An arm 12e is provided on the slide head 12c. A shaft 12g rotatably driven by a motor 12f is supported at the tip of the arm 12e.

Then, as shown in FIG. 2, the tip of the shaft 12g is fitted into the recess in the center of the laminating jig 13, and the polished workpiece 2 is pasted on the curved surface of the laminating jig 13. It is made to come into sliding contact with the inner circumferential wall of.

With such a configuration, the workpiece 2 attached to the bonding jig 13 is brought into sliding contact with the inner circumferential surface of the radius plate 1 while the radius plate 1 is rotated by the drive shaft 11, and the slide head 12c is moved with air. The polishing workpiece 2 can be reciprocated between the center and the periphery of the round plate l by being driven forward and backward by the cylinder 12d. In addition, in this case, the bed 12b
Since it is provided so as to be able to move up and down and rotate freely with respect to the pedestal 12a, the polishing workpiece 2 can be brought into sliding contact with the inner circumferential surface of the rounded plate l with an appropriate pressing force due to the weight of the advancing and retracting mechanism 12 itself.

Therefore, the front surface of the polished workpiece 2 can be polished into a convex lens shape following the spherical surface of the rounded plate 1, and so-called convex polishing can be performed.

Therefore, compared to manual polishing, a polished workpiece, for example a piezoelectric piece, can be mechanically and uniformly polished, resulting in good productivity and uniform quality.

(Effects of the Invention) As detailed above, the present invention provides a convex polishing apparatus that can automatically perform convex machining, significantly improve productivity, and produce products with less uneven quality. be able to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
FIG. 3 is a front view of the main parts of the apparatus shown in the figure, and FIG. 3 is a perspective view of a rounded plate used in a conventional polishing operation. l ◆ φ 1 ・ 2 ・ ・ ・ ・ 1 l ・ 1 ・ ・ 12 ・ ・ ・ ・ 12g ・ φ ・ 13 ・ ・ ・ ・ ・ R dish polishing workpiece drive shaft advancement/retraction mechanism shaft bonding jig

Claims (1)

[Scope of Claims] A radius plate whose inner circumferential wall is formed into a spherical surface, a drive shaft extending from the outer wall in the direction of extension from the center of the spherical surface of the radius plate and rotationally driving the radius plate, and a drive shaft protruding from the tip thereof. an advancing/retracting mechanism in which the shaft is movable in the radial direction along the spherical surface of the rounded plate, and a polished workpiece that is in contact with the tip of the shaft of this advancing/retracting mechanism and bonded to the front surface is attached to the inner circumferential wall of the rounded plate. A convex polishing processing device comprising: a bonding jig that is brought into sliding contact and rotated; and a convex polishing device.