JPS63306869A - Work supporting device - Google Patents

Abstract

PURPOSE:To enable a workpiece, having a radius of curvature in various kinds, to be stably polished by placing a rotary axis of the workpiece crossing the turning axial line of a swivel arm in one point and setting this imaginary crossing point to be positioned in the bottom of the workpiece. CONSTITUTION:A supporting device supports a swivel arm 4 turnably through the first supporting axial part 3 to the bottom end part of a stay 2 and a workpiece supporting shaft 6 rotatably through the second supporting axial part 5 to this arm 4. The axial line of this workpiece supporting shaft 6 is set so as to pass through the center of curvature (spherical center) 0 of a workpiece (lens) 7 supported to this shaft 6. A rotary axial line Z of the workpiece 7, passing through this center of curvature 0 of the workpiece 7, crosses the axial line of the first rotary axial part 3, that is, the turning axial line X of the swivel arm 4 in one point S. The supporting device, positioning this point S in the bottom of the workpiece 7 and generating a polishing angle sufficiently small within 30 deg., polishes the workpiece 7 stably from its bottom side by a polishing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a workpiece support device used in an optical element polishing machine.

[Conventional technology] The conventional technology is explained based on the content described in "Optical element processing technology 85 Knee 2 Grinding and polishing" (September 1985, 10EI, published by the Optical Fabrication Technology Association) Nos. 113 to 116. do.

In general, a workpiece support device of an optical element polishing machine is configured as shown in FIG. 8, which illustrates processing of an optical lens (concave polishing). In FIG. 8, the symbol l indicates a polishing plate with a convex top, which is sunk and rotatable about its axis. Above the polishing dish l, the hairpin 2 has nine arcs of circles.
It is provided so as to be able to freely swing in an elliptical shape, a straight m shape, etc. A hairpin ball 2a is formed at the lower end of the hairpin 2, and a pasting plate 3 is attached to the hairpin ball 2a so as to be able to swivel freely. Further, a lens 4 is attached to the lower surface of the attachment plate 3 with the surface to be polished facing downward.

According to the device having the configuration L, the hairpin ball 2a of the hairpin 2
The surface of the lens 4 to be polished is polished by pressing the lens 4 against the polishing mold l using the spherical center Q as a support point, and by interlocking the hairpin 2 with its swing and interlocking the rotation of the polishing mold 1. be.

Here, when a point on the outer periphery of the lens 4 is P and the tangent at point P is PN, ZQPN = 0° is called the polishing angle, and if the polishing angle θ1 is sufficiently small, stable polishing can be performed.
High surface accuracy can be obtained.

[Problems to be Solved by the Invention] However, in the case of convex polishing, the polishing angle 07 becomes large as shown in FIG. 9, making polishing impossible. In this case, a polishing machine called a ball-centered polishing machine that always presses the lens 4 against the polishing die l in the stacking direction, that is, a polishing machine that can apply pressure through the spherical center of the polishing die l, may be used. cannot be processed.

Therefore, convex polishing can be performed by setting the lens 4 on the F-axis side and polishing @1 on the upper axis side, as shown in FIG.

However, in the case of such a polishing method, as shown in the figure, unless the diameter of the polishing mold 1 is made smaller than the diameter of the polishing mold 1 in the polishing method shown in FIG. 9, machining with good spherical accuracy cannot be achieved. In this case, if the diameter of the polishing mold l is made smaller, the spherical surface of the polishing mold l will change faster,
When processing many lenses 4, it becomes difficult to stabilize the curvature, and in the case of the configuration shown in Fig. 1θ, the lower end of the axis of attachment @ 3 is connected to the rotation drive device by screwing or taper fitting. Since the configuration is connected to the attachment plate 3 for each lens,
The replacement work was complicated, and it sometimes got stuck, especially in the case of tapered fitting.

That is, in the past, when polishing the lenses 4 one by one, it was not possible to stably process all lenses with the polishing die l placed below the lenses 4. It was developed by focusing on the problems of conventional methods, and can be applied to workpieces with any radius of curvature (lenses, etc.) regardless of whether they are concave spherical surfaces, circular surfaces, or convex spherical surfaces, and stable polishing can be performed without creating a large number of burrs. The present invention provides a workpiece holder for an optical element polishing machine that can obtain high surface accuracy.

[Means for Solving the Problem] FIG. 1 is a conceptual diagram showing the configuration of a workpiece support device 1 according to 1 of the present invention. As shown in FIG. Stay 2 fixed to the shaft (not shown)
A swing arm 4 rotatably supported at the lower end of the stay 2 via a first support shaft 3;
A workpiece support shaft 6 is rotatably supported via a support shaft 5, and the axis of the second support shaft 5 intersects the axis of the first support shaft 3. It is set to . Further, the axis of the workpiece support shaft 6 is
It is set so that it passes through the center of curvature 0 of the workpiece 7 supported by . The rotational axis Z of the workpiece 7 passing through the center of curvature 0 of the workpiece 7 and the axis of the first rotational shaft 3, that is, the rotational axis X of the swinging arm 4, intersect at one point S, and these five points It is set so that it is located below 7. In addition, these 5
The point corresponds to the center Q of the hairpin ball 2a shown in FIGS. 8 to 1O.

[Function] In the above configuration, the point corresponding to the center of the conventional hairpin ball becomes an imaginary point, so there is no physical restriction and, for example, the above point is placed inside the workpiece 7 or inside the ω1 polishing plate. Keeping the imaginary point alive makes itJ the needle. As a result, it becomes possible to arbitrarily set the polishing angle, and the polishing angle can be made sufficiently small. In addition, the polishing angle is 3
It is desirable to set it within 0 degrees.

[Example] Hereinafter, an example of the present invention will be described in detail using FIGS. 2 to 7. In the following description, the same reference numerals are given to the same components as those shown in FIG. 1.

(First Embodiment) FIG. 2 shows a first embodiment of a workpiece support structure 211 according to the present invention.

In the figure, 2 indicates the laboratory PIa, which is not shown.
This is a stay fixed to the upper shaft of. At the lower end of the stay 2, a swinging arm 3 formed in an L shape is attached to a support shaft 4 with its horizontal portion facing upward. It is supported via a bearing 5. Reference numeral 6 indicates a nut member. A workpiece support shaft 7 is removably supported on the upper horizontal part of the swing arm 3 via a bearing 8, and a convex lens (workpiece) 9, which is a workpiece, is mounted on the lower surface of the workpiece support shaft 7. Supported. The rotational axis Z of the workpiece support shaft 7 passes through the center of curvature O of the convex lens 9 that is the workpiece, and also intersects with the axis X of the support shaft 4 at a point S.
The settings are such that they intersect (including both orthogonal and non-orthogonal cases). These three points are the convex lens 9
A line segment PQ perpendicular to the line segment OF connecting the center of curvature O and a point P on the outer circumference of the convex lens 9, that is, a tangent PQ at point P
And 1. It is the intersection point with the rotation axis X of the moving arm 3, and 3
The point is located below the convex lens 9. Therefore, the polishing angle is set to 0 degrees.

According to the configuration described in L, the IF? By rotating and swinging the plate, the convex lens 5, which is the object to be processed, can be polished.

Furthermore, in the configuration of this embodiment, the point corresponding to the center of the hairpin ball in the prior art is an imaginary point, so there is no physical restriction. Therefore, for example,
Existing the above-mentioned imaginary point inside the convex lens 9, which is the object to be processed, or inside the polishing plate, which is not shown, constitutes turning. As a result, since the polishing angle can be set to 0 degrees, the convex lens 9 can be stably polished by rotating and swinging the polishing plate that makes an upper axis or rotational movement about the spherical center O, and the high surface Accuracy can be obtained.

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention. This embodiment uses a workpiece support shaft (applied plate) 7 having a concave lens (workpiece) 20 attached to the tip of the shaft. In this embodiment as well, three points are the concave lenses 20 as in the first embodiment.
The shape and dimensions of the workpiece support shaft 7 are set so that it passes through a tangent line PN at a point P on the outer periphery of the workpiece support shaft 7, and the polishing angle is set to 0 degrees. The rest of the structure is the same as that shown in FIG. 2, so similar members are given the same reference numerals and their explanations will be omitted.

According to the above configuration, the concave lens 20 can be polished stably. Moreover, the configuration of this embodiment can be obtained by simply changing the shape 9 dimensions of the workpiece support shaft 7 in the configuration of the first embodiment and attaching and detaching it to the bearing 7.
Stable polishing of lenses (workpieces) with different shapes (irregularities, etc.) or different dimensions (curvature, diameter, etc.), not limited to 0, becomes town fat. Other functions and effects are the same as those in the first embodiment, so their explanation will be omitted.

(Third Embodiment) FIG. 4 shows a third embodiment of the present invention. In this embodiment, the swinging arm 3 is formed in a U-shape, the water pump section 3a is set in the I- state, and the swinging arm 3 is set in the state of I-, and the swinging arm 3 is set in the state of I-, and the swinging arm 3 is connected via a support shaft 4 with both leg sections 3b facing each other in the 11-shape. The support arm 2a at the end of the stay 2 is rotatably supported by the support arm 2a.

The axes of the opposing support shafts 4 are located on the X-ray in FIG. 2, and at one point S on this axis, the rotation axis Z of the workpiece support shaft 7 and the applied It is set so that it intersects with a tangent PQ passing through an arbitrary point P on the outside E of the convex lens 9, which is a body.The other configuration is the same as that shown in FIG. The same reference numerals are given to the members and the explanation thereof will be omitted.

In this embodiment, since the swing arm 3 is supported on both sides, the rigidity can be increased.

Therefore, even if machining pressure is applied during the front cutting, the workpiece support structure 31 can be prevented from being bent due to the bending of the support shaft 4, and the five points on the X-axis can be stably held. As a result, the polishing angle can be stably maintained at 0 degrees even when a large machining load is applied during polishing, so there is an advantage that a processed product with higher surface accuracy can be obtained.

(Fourth Embodiment) A fourth embodiment of the present invention is shown in FIG. This is because the workpiece support shaft 7 is held by magnetic force so that it does not fall. Arm 4
1 may be fixed to the stay 2, but it is preferable to attach an arm 41 to a moving means (not shown) so that the arm 41 can be viewed upwardly during workpiece machining. If the dependent rotation of the convex lens 9, which is the workpiece, is hindered, it will cause deterioration of the spherical precision.
This is because it is preferable to move 0 upward. The rest of the structure is the same as that shown in FIG. 4, so similar members are given the same reference numerals and their explanations will be omitted.

According to the configuration described in section 1-1, even when the grinding plate and the convex lens 9 are not in contact with each other, the convex lens 9 will not fall from the workpiece holding device l. Therefore, if the loading device is installed, the workpiece will be automatically Loading and unloading can be performed, and in addition, work efficiency can be improved.

(Fifth Embodiment) FIG. 6 shows the configuration of the main parts of a fifth embodiment of the present invention. In this embodiment, the arm support shaft 7 is held by air suction force instead of the magnet 40 in FIG. It is configured so that it can be used. The configuration other than the components of the arm 41 is the same as that shown in FIG. 5, so illustration and description thereof will be omitted.

A groove 51 for fitting an O-ring 50 is provided on the lower end surface of the arm 41.
is formed, and an O-ring 51 for sealing is fitted into this groove 50. A hollow ventilation hole 52 is provided through the axial center of the arm 41, and this ventilation hole 52 is connected to a vacuum suction device (not shown). The arm 41 is disposed above the workpiece support shaft 7 and is configured to be able to move up and down via a moving device (not shown).

During machining of the workpiece, the vacuum ball center is released and the arm 41 is moved upward, and after machining is completed, the O-ring 50 is moved down to the position where it contacts the upper surface of the workpiece support shaft 7 (see Fig. 5). The setting is such that the workpiece can be removed from the polishing plate by suction.

The above configuration also provides the same functions and effects as the fourth embodiment, but in particular, according to this embodiment, the O-ring 50 serves as a buffer material and also exhibits a sealing effect during suction. This is Shiuruchino.

Further, according to the configuration of this embodiment, the workpiece can be held almost regardless of the material of the workpiece support shaft 7. Therefore, the workpiece (lens to be processed) is automatically loaded,
Unloading can be carried out, which improves workability and efficiency in machining operations.

(Sixth Embodiment) FIG. 7 shows the sixth embodiment of the present invention.
In the configuration shown in the figure, a holder 60 for holding the workpiece is used instead of the workpiece support shaft 7, and a convex lens 9 that is the workpiece is used.
It is structured so that it can hold the data without having to recycle it. The holder 60 is fitted with the convex lens 9 and
Work holding part 6 having four parts 61 for fitting and holding
0a and a shaft portion 60b that fits into the bearing 8, and is fixedly held on the bearing 8 via a nut member 62 that is screwed onto a screw W60C screwed into the shaft end of the shaft portion 60b. It is now possible to do so. A suction hole 63 is provided through the axial center of the holder 60, and is configured to suction and hold the convex lens 9 in cooperation with the arm 41 disposed above the holder 60. The other configurations are the same as those shown in FIGS. 4 and 6, so similar members are given the same reference numerals and their explanations will be omitted.

According to this embodiment, since the lens 9, which is a workpiece, can be attached and detached by itself, it is possible to attach and detach the lens 9! 1-release process is not required. Although the configuration without the arm 41 is also a rotating part, when the arm 41 is installed, the lens itself can be easily attached and detached. As a result, the rope ink and unrope ink of the lens 9 can be automatically performed, and the work efficiency in the polishing work can be improved.

[Effects of the Invention] As described above, according to the present invention, it is possible to accurately hold a plane, a lens close to a plane, a convex lens, a concave lens, and other workpieces, and stable processing becomes possible. With,
The aim is to promote automation of polishing processes, etc.

[Brief explanation of drawings]

Figure 1 is a conceptual diagram of a device related to unreleased IJ1, and Figure 2 is a
FIG. 3 is an explanatory diagram showing a second embodiment of the device according to the present invention; FIG. 4 is a third embodiment of the device according to the present invention. FIG. 5 is an explanatory diagram showing a fourth embodiment of the apparatus according to the present invention; FIG. 6 is an explanatory diagram showing main parts of the fifth embodiment of the apparatus according to the present invention; FIG. 7 is an explanatory diagram showing a sixth embodiment of the apparatus according to the present invention, and FIGS. 8 to 1θ are explanatory diagrams of the prior art. 2... Stay 3... Support shaft 4... Swinging arm 5... Support shaft 6... Work support shaft 7... Work (workpiece) Patent applicant Olympus Optical Industry Co., Ltd. Agent Person Patent Attorney Takeshi Nara (ρ 4L zoΦ ko, 10 Figure 3 Figure 5 I) Father Figure 6 d)

Claims (2)

[Claims] (1) A workpiece support shaft that supports a workpiece, which is a workpiece, at the tip of the shaft, and supports the workpiece support shaft rotatably around the shaft, and is located on an axis that intersects with the axis of the workpiece support shaft. a swinging arm configured to swing freely around a swinging center disposed in the swinging arm; A workpiece support device characterized by being configured such that an intersection point can be set at an arbitrary point. (2) A work support shaft that supports a workpiece as a workpiece at the shaft tip, a holding means capable of holding the workpiece as a workpiece or the workpiece support shaft that holds the workpiece; a swinging arm rotatably supported around the axis of the workpiece and swingable about a swinging center disposed on an axis intersecting the axis of the workpiece support shaft; 1. A workpiece support device, characterized in that the intersection between the rotational axis of the workpiece supported by the support shaft and the axis of the swinging center of the swinging arm can be set at an arbitrary point.