JPH02205466A - Polishing device for convex - Google Patents

Abstract

PURPOSE:To subject a workpiece to be polished, such as a crystal oscillator, etc., to convex-working with high quality by providing a second link reciprocation-driving, along a guide groove, a cemented jig for sliding a polishing work cladded to the front face with the inner peripheral wall of the round face of a bowl for rotation-driving the workpiece. CONSTITUTION:A work (e.g. crystal piece) 17 to be polished is sticked to the front face of a cemented jig 16 and this jig 16 is fitted to the other end of a first link 18. Then, an round bowl 1 is turned and driven while a polishing material is dissolved in water and dripped, then a movable member 19 is moved along a support shaft 13, and the first link 18 is opened and closed along the support shaft 13 via a second link 20. Thus the cemented jig 16 is reciprocatably driven while it rotates along the guide groove 14 of the round bowl 1, the work 17 sticked to the jig 16 is slided on the inner peripheral wall of the round bowl 1, thereby polishing, i.e., convex working is executed in a spherical form by performing profiling on the curved face of the round bowl 1.

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 second
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 etc. Machining is performed by reciprocating in the radial direction between the center 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 pieces are processed one by one, resulting in low productivity, uneven quality, and an increase in cost.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a convex processing device for crystal resonators that can automatically perform convex processing, has high productivity, and has less unevenness in quality. It is something to do.

(Summary of the Invention) The present invention is characterized in that, while rotating a round plate whose inner circumferential surface is formed into a spherical surface, a polished workpiece is brought into sliding contact with the inner circumferential surface and is driven forward and backward in the radial direction.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to a perspective view of main parts shown in FIG. 1 and a sectional view 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.

A bowl plate 12 faces the inner circumferential wall of the rounded plate l with a constant gap, and a support shaft 13 is provided in the direction of the center of the extension of the drive shaft 11.

The bowls 11 and 112 are provided with a plurality of guide grooves 14 radially extending from a portion where the support shaft 13 is attached, and a linear gear 15 is carved into one side wall of the guide grooves 14.

The guide groove 14 is provided with a bonding jig 16 having a pinion gear 16A that meshes with the linear gear 15.
It is fitted so that it can move forward and backward. A polished workpiece 17 pasted with paraffin or the like on the front surface of this pasting jig 16 is held in sliding contact with the inner circumferential wall of the radius I' [Ill.

One end portion of the first links 18 corresponding to the number of bonding jigs 16 is pivotally supported on the support shaft 13 corresponding to the center position of the spherical surface of the inner circumferential wall of the radius 11111. and,
A bonding jig 16 is rotatably held at the other end of each first link 18 .

A movable member 19 is fitted between a portion of the support shaft 13 to which the bowl plate 11 is attached and a pivot portion of the first link 18 so as to be able to move forward and backward. A second link 20 is provided between the movable member 19 and each of the first links, and the laminating jig 16 is driven forward and backward in the radial direction by the forward and backward movement of the movable member 19. There is.

With such a configuration, when performing convex processing, the polished workpiece 17, for example, a crystal piece, is pasted with paraffin or the like on the front surface of the bonding jig 16, and each is attached to the other end of the first link 18. do.

Then, while dissolving an appropriate amount of abrasive material in water, the R plate 1 is rotated by a drive mechanism (not shown), and the movable member 19 is driven forward and backward along the support shaft 13.
performs an opening/closing motion with respect to the support shaft 13, thereby making it possible to reciprocate the bonding jig 16 while rotating it along the guide groove 14. At this time, since the pinion gear 16A of the bonding jig 16 meshes with the linear gear 15 provided on the side wall of the guide groove 14, the bonding jig 1
6 is driven to reciprocate while rotating itself.

Since the crystal piece 2 attached to the front surface of the bonding jig 16 is in sliding contact with the inner circumferential wall of the radius plate 1, it rotates and reciprocates, and is polished into a spherical surface following the curved surface of the radius plate 1. So-called convex processing can be applied.

Note that the present invention is not limited to the embodiments described above, and for example, a first shaft may be provided passing through the round plate and the bowl plate, and a second shaft provided coaxially with the first shaft may be provided. The round plate may be rotationally driven as a drive shaft.

(Effects of the Invention) As described in detail above, according to the present invention, it is possible to provide a convex polishing apparatus that can automatically perform convex machining, significantly improves productivity, and has less uneven quality.

[Brief explanation of the drawing]

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 side sectional view of the apparatus shown in the figure, and FIG. 3 is a perspective view of a rounded plate used in a conventional polishing operation. 1-・Contact 111 + R plate 2... Polished workpiece 11... Drive shaft 12 Contact l 3 ・ 14 φ 15 Φ l 6 ・ l 7 Contact 18 ・ l 9 Self 20 ・ ・ Bowl plate・Support shaft, guide groove, linear gear, bonding jig, polished workpiece, first link, movable member, second link

Claims (1)

[Scope of Claims] A radius plate whose inner circumferential wall is formed into a spherical surface and is rotationally driven by a drive shaft extending outward from the center of the spherical surface from the outer wall; A bowl plate with a support shaft provided in the center direction of the extension of the drive shaft, a plurality of guide grooves cut out radially around the mounting position of the support shaft of the bowl plate, and one side wall of each guide groove. and a pinion gear that is fitted into each of the guide grooves and meshes with the linear gear, and the polished workpiece attached to the front surface is slidably attached to the inner circumferential wall of the rounded plate. a plurality of first links having one end pivotally supported on the support shaft corresponding to the center of the spherical surface of the rounded plate and rotatably holding the bonding jig at the other end. a movable member provided on the support shaft between the bowl plate and the first link so as to be movable back and forth along the axial direction; and a movable member that connects the movable member and the first link and is movable. A convex polishing device comprising: a second link that reciprocates the bonding jig along the guide groove by moving the members forward and backward.