KR20230033370A - Polishing apparatus for Spherical Preform Lens - Google Patents

Abstract

The present invention relates to a spherical preform lens polishing device, wherein the top board is rotated together by rotation of the bottom board or the top board is rotated in a different direction by a driving means provided to the top board, thereby more improving processing precision, and the top board is moved in a side direction which is perpendicular to a central shaft, and at the same time, the top board is rotated, thereby increasing polishing efficiency and increasing liquidity of cutting oil through holes formed on the top board, an inner wheel jig, and an outer wheel jig.

Description

Spherical preform lens polishing apparatus {Polishing apparatus for Spherical Preform Lens}

The present invention relates to a spherical free-form lens polishing apparatus, and more specifically, a spherical free-form lens polishing apparatus in which a plurality of spherical lens raw materials drawn into the upper surface of the lower surface are polished in the vertical direction by rotating the lower and upper surface together. It is about.

In general, a ball lens polishing apparatus polishes the surface of a spherical lens raw material and processes it into a desired spherical lens.

1 is a view for explaining a conventional ball lens polishing device. Referring to FIG. 1, the conventional device for polishing a spherical lens raw material includes a lower plate 10, a rotating part 20, a driving device 30, and It consists of a cutting oil supply device 40.

Here, the lower table 10 is provided in a circular shape at the center of the top of the table T, rotates around the center, and the rotating table 20 is installed at the top of the lower table and rotates the spherical lens raw material drawn into the inside. The rotating unit driving device 30 provides rotational force so that the rotating unit 20 can rotate, and the cutting oil supply unit 40 supplies cutting oil through a hose.

2 is a view for explaining the rotating part 20 of the conventional ball lens polishing apparatus. Referring to FIG. made including

Here, the rotating ring 22 rotates in contact with the rotating unit driving device 30, and the guide ring 21 is introduced into the rotating ring 22 and is provided with a ring shape into which a spherical lens raw material is introduced. , The upper plate 23 is stacked on top of the guide ring 21 to polish the surface of the spherical lens raw material.

In this conventional ball lens polishing device, the spherical lens raw material rotates along the inner circumferential surface of the guide ring 21 by the centrifugal force generated by the rotation of the lower table 10 and the rotating ring 22.

Here, as the spherical lens raw material rotates, the surface of the spherical lens raw material is polished through friction between the lower surface plate 10 and the upper surface plate 23 at the same time.

However, in the conventional ball lens polishing apparatus, the upper table 23 is not driven, and the lower table 20 and the rotation ring 22 are rotated to polish the spherical lens raw material, resulting in low precision.

The present invention has been made to solve this problem, and an object of the present invention is to polish a spherical freeform lens in which a plurality of spherical lens raw materials can be polished in the vertical direction by rotating the upper table together with the rotation of the lower table. to provide a device.

Another object of the present invention is to provide a spherical preform lens polishing device capable of improving the processing precision of a plurality of spherical lens raw materials by rotating the upper and lower surface halves in different directions.

The objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the present invention has a disk-shaped lower surface plate body, a disk shape having a smaller diameter than the lower surface plate body, a recessed portion integrally extending from an upper portion of the lower surface plate body, and a circular ring shape of the recessed portion. A lower polishing plate including a lower polishing layer provided on an upper surface and rotatably provided with respect to the central axis of the lower polishing body, an upper polishing plate provided in a disk shape and having an upper polishing layer provided on the lower surface, and a circular ring shape , and includes an outer ring jig inserted into the recessed portion, and when the lower polishing plate is rotated, the upper polishing plate is rotated together, and a plurality of spherical lens raw materials positioned between the lower polishing layer and the upper polishing layer. It provides a spherical preform lens polishing apparatus, characterized in that the material is polished in the vertical direction by the lower polishing layer and the upper polishing layer.

In a preferred embodiment, a rotation driving means for rotating the upper table with a central portion of the upper table as a central axis is further included, and the rotation driving means rotates the upper table in a direction different from that of the lower table.

In a preferred embodiment, the outer ring jig is formed with a plurality of cutting oil discharge holes penetrating in a lateral direction, the cutting oil discharge holes are located above the lower polishing layer, and the cutting oil introduced into the inside is discharged to the outside.

In a preferred embodiment, an inner ring jig is formed in a ring shape with a second cutting oil hole in the center, a plurality of lens holes penetrating in the vertical direction, and is inserted into the center hole of the outer ring jig, further comprising: Through this, the spherical lens raw materials are placed on the lower polishing layer.

In a preferred embodiment, an inner ring holder inserted into the lens hole and having a plurality of individual lens holes into which the spherical lens raw materials are respectively inserted is further included.

In a preferred embodiment, the upper half

At least one first cutting oil hole is provided at the center of the upper table and penetrates in the vertical direction, and the cutting oil passes through the first cutting oil hole, flows into the second cutting oil hole and the lens hole, and then passes through the cutting oil discharge hole. discharged to the outside through

In a preferred embodiment, a pressing means for applying a load to the upper table in a downward direction to pressurize the lens raw materials is further included.

In a preferred embodiment, the upper table is rotatable while moving in a lateral direction orthogonal to the central axis.

The present invention has the following excellent effects.

According to the spherical freeform lens polishing device of the present invention, a plurality of spherical lens raw materials are located between the lower polishing layer and the upper polishing layer, and as the lower polishing plate rotates, the upper half rotates together, so that the lower polishing layer and the upper polishing plate are rotated together. By polishing the spherical lens raw material in the vertical direction by the layer, there is an effect of increasing the polishing precision and improving the production efficiency.

In addition, according to the spherical free-form lens polishing device of the present invention, a plurality of spherical lens raw materials are located between the lower polishing layer and the upper polishing layer, and the driving means rotates the upper polishing plate in the opposite direction to the lower polishing plate, By rotating the upper and lower halves in different directions, it has an advantage of further improving the processing precision of the lens.

In addition, according to the spherical freeform lens polishing apparatus of the present invention, the upper half moves in a lateral direction orthogonal to the central axis and rotates at the same time, thereby increasing the polishing efficiency.

In addition, according to the spherical freeform lens polishing device of the present invention, the cutting oil introduced through the first cutting oil hole of the upper wheel is introduced into the lens hole through the second cutting oil hole of the inner ring jig, and through the cutting oil discharge hole of the outer ring jig. As the cutting oil is discharged, it has the advantage of increasing the fluidity of the cutting oil.

1 is a perspective view of a conventional spherical lens raw material polishing device.
2 is an exploded view of a rotating part of a conventional spherical lens raw material polishing apparatus.
3 is an exploded perspective view illustrating a spherical preform lens polishing apparatus according to an embodiment of the present invention.
4 is an exploded cross-sectional view illustrating a spherical preform lens polishing apparatus according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a spherical preform lens polishing apparatus according to an embodiment of the present invention.
6 is a view for explaining an inner ring jig of a spherical freeform lens polishing apparatus according to an embodiment of the present invention.
7 is a view for explaining an inner ring holder of a spherical freeform lens polishing apparatus according to an embodiment of the present invention.
8 is a view for explaining a pressing means of a spherical preform lens polishing apparatus according to an embodiment of the present invention.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible, but in certain cases, there are terms arbitrarily selected by the applicant. Therefore, its meaning should be understood.

Hereinafter, the technical configuration of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numbers indicate like elements throughout the specification.

3 is an exploded perspective view for explaining a spherical free-form lens polishing apparatus according to an embodiment of the present invention, and FIG. 4 is an exploded cross-sectional view for explaining a spherical free-form lens polishing apparatus according to an embodiment of the present invention, 5 is a cross-sectional view illustrating a spherical preform lens polishing apparatus according to an embodiment of the present invention.

3 to 5, in the spherical freeform lens polishing apparatus according to an embodiment of the present invention, the lower and upper polishing plates are rotated to precisely polish the spherical lens raw material by the lower polishing layer and the upper polishing layer. As a device for this, it includes a lower table 110, an upper table 120, and an outer ring jig 130.

Here, the spherical lens raw material (G) may be a glass material or a chalcogenide material, and the chalcogenide material has excellent transmittance in the infrared region.

The lower surface plate 110 is a means for processing the spherical lens raw material (G) from below by rotating about a central axis, and the lower surface plate body 111, recessed portion 112, and lower polishing layer 113 are formed. made including

Here, the lower surface plate body 111 serves to support the outer ring jig 130 to be described later and is provided in a disk shape.

In addition, the concave portion 112 has a disk shape having a diameter smaller than that of the lower surface plate body 111 and integrally extends from the upper surface of the lower surface plate body 111 .

Here, the lower surface plate body 111 and the recessed portion 112 may be made of a material such as Al, S45C, or SUS.

In addition, the lower polishing layer 113 is provided in a ring shape on the upper surface of the concave portion 112 .

Here, the lower polishing layer 121 may be made of a metal dia material.

In addition, the lower polishing layer 121 is worn as it is polished, and since the worn lower polishing layer 121 lowers the accuracy of the lens, the flatness of the lower polishing layer 121 should be checked at regular intervals.

Here, if the degree of abrasion of the lower abrasive layer 113 is high, it is necessary to improve the precision of the lens by replacing it.

In addition, a separate polishing pad may be further attached to the lower polishing layer 113 .

This is to process the lens using a polishing pad made of a different material according to the processing process.

For example, the polishing pad may be made of cerium oxide, polyurethane, or suede.

The upper surface plate 120 rotates together with the rotation of the lower surface plate 110, and is a means for polishing the spherical lens raw material G from above, and is provided in a circular plate shape, and the upper surface is polished on the lower surface. Layer 121 is provided.

Here, the upper surface plate 120 is made of the same material as the lower surface plate body 111 and the concave portion 112, and the upper polishing layer 121 is made of the same material as the lower polishing layer 113. It can be.

In addition, the flatness of the upper polishing layer 121 should be checked at regular intervals like the lower polishing layer 113 to improve the precision of the lens.

In addition, a separate polishing pad may be further attached to the upper polishing layer 121 , and the polishing pad is the same as the polishing pad attached to the lower polishing layer 113 .

In addition, the upper table 120 may have at least one first cutting oil hole 123 through which cutting oil flows.

Here, the first cutting oil hole 123 is formed in the upper table 120 and may be formed in plurality at symmetrical positions with respect to the rotation axis.

The outer ring jig 130 is provided in a circular ring shape as a means for preventing the separation of the spherical lens raw material G placed on the lower polishing layer 113 when the lower surface plate 110 rotates. It is fitted into the recessed part 112.

Here, when the spherical lens raw material (G) is placed on the lower polishing layer 113, the spherical lens raw material should be located above the upper surface of the outer ring jig.

The reason is to allow the spherical lens raw material (G) to be polished by the upper polishing layer 121.

More specifically, when the outer ring jig 130 exceeds a predetermined thickness, the spherical lens raw material (G) may not be polished or may not reach the desired polishing amount.

Conversely, when the outer ring jig 130 is thinner than a predetermined thickness, the spherical lens raw material G may be separated by centrifugal force.

In addition, the outer ring jig 130 may be provided in a structure in which a plurality of pieces are stacked according to the diameter of the spherical lens raw material (G).

In addition, the material of the outer ring jig 130 may be selected according to the material of the lens. For example, the material of the outer ring jig 130 is epoxy containing a large amount of glass fiber, plastic-based ABS, or bakelite. etc. can be used.

In addition, the outer ring jig 130 may be formed with a plurality of cutting oil discharge holes 131 penetrating in the lateral direction.

Here, the cutting oil discharge hole 131 is located above the lower polishing layer 113 and serves to discharge the cutting oil introduced into the inside to the outside.

Thus, when the lower polishing plate 110 is rotated, the upper polishing plate 120 is rotated together, so that a plurality of spherical lens raw materials positioned between the lower polishing layer 113 and the upper polishing layer 121 ( G) is polished in the vertical direction by the lower polishing layer 113 and the upper polishing layer 121 .

In addition, cutting oil is introduced into the first cutting oil hole 123, and the introduced cutting oil cools the upper and lower table 120 and 110, and the upper and lower table 120 and 110 It serves as a lubricant to rotate smoothly, and is discharged to the outside through the cutting oil discharge hole 131 together with the foreign substances remaining on the upper and lower table 120 and 110.

6 is a view for explaining an inner ring jig of a spherical freeform lens polishing apparatus according to an embodiment of the present invention.

Referring to FIG. 6 , an apparatus for polishing a spherical freeform lens according to an embodiment of the present invention further includes an inner ring jig 140 .

The inner ring jig 140 is a means for precisely grinding the spherical lens raw material G, and is provided in a ring shape with a second cutting oil hole 141 formed in the center, and is inserted into the center hole of the outer ring jig. , a plurality of lens holes 142 penetrating in the vertical direction are formed.

Here, the spherical lens raw materials G are placed on the lower polishing layer 113 through the lens holes 142 .

In addition, the cutting oil flowing into the first cutting oil hole 123 passes through the second cutting oil hole 141, flows into the lens hole 142, and is discharged through the cutting oil discharge hole 131.

In addition, the material of the inner ring jig 140 may be selected according to the material of the lens, and the material selected is the same as that of the outer ring jig.

In addition, the thickness of the inner ring jig 140 is preferably 65% to 75% of the diameter of the spherical lens raw material (G).

The reason is that if the thickness of the inner ring jig 140 is wide, the spherical lens raw material G may not be polished or may not reach the polishing amount for the purpose of processing.

Conversely, if the thickness of the inner ring jig 140 is thin, the surface of the spherical lens raw material G may be rubbed or dragged and damaged.

7 is a view for explaining an inner ring holder of a spherical freeform lens polishing apparatus according to an embodiment of the present invention.

Referring to FIG. 7 , the spherical freeform lens polishing apparatus according to an embodiment of the present invention further includes an inner ring holder 150 .

The inner ring holder 150 is inserted into the lens hole 142 as a means for grinding the spherical lens raw material G individually and more precisely, and the spherical lens raw material G is respectively A plurality of individual lens holes 151 are formed.

Here, the diameter of the lens hole 142 is preferably 105% to 115% larger than the diameter of the inner ring holder 150 .

Accordingly, when the inner ring holder 150 is inserted into the lens hole 142, the inner ring holder 150 may be rotatably provided through a free space existing around the inner ring holder 150.

In addition, the diameter of the individual lens hole 151 is preferably 110% to 130% larger than the diameter of the spherical lens raw material (G).

This is to give a space in which the spherical lens raw material G can rotate in the individual lens hole 151 .

Therefore, the movement of the inner ring holder 150 and the rotation of the spherical lens raw material G are performed simultaneously, thereby improving processing precision.

In addition, as the material of the inner ring holder 150, plastic-based ABS may be used.

In addition, the inner ring holder 150 has the same thickness as the inner ring jig 140.

In addition, the spherical preform lens polishing apparatus according to an embodiment of the present invention further includes an upper table rotation driving means 160 for rotating the upper table 120 .

The upper table rotation driving means 160 is connected to the central shaft 161 and rotates the upper table 120 .

More specifically, one side of the central axis 161 is connected to the upper center of the upper table 120, and the other side is connected to the driving means 160 of the upper table 120.

Here, the upper table rotation driving unit 160 rotates the upper table 120 in a direction different from that of the lower table 110 by using the central portion of the upper table as a central axis 161 .

In addition, the upper half 120 is rotatable while moving in a lateral direction orthogonal to the central axis 161 .

More specifically, one side of the central axis 161 is connected to a hemispherical groove formed at the center of the upper end of the upper table 120 .

Here, the diameter of the groove is larger than the diameter of the central axis 161, and as the upper half rotates, the upper half 120 is movable into the free space of the groove.

Accordingly, the movement of the upper half 120 causes all surfaces of the spherical lens raw material G to be polished to improve processing precision.

8 is a view for explaining a pressing means of a spherical preform lens polishing apparatus according to an embodiment of the present invention.

Referring to FIG. 8 , an apparatus for polishing a spherical preform lens according to an embodiment of the present invention may further include a pressing means 170 .

Here, the pressing means 170 applies a load to the upper half 170 in a downward direction so that the spherical lens raw materials G are pressed.

Therefore, by applying a different pressure to the spherical lens raw material (G), it is possible to polish the lens to suit the purpose.

As described above, according to the spherical freeform lens polishing apparatus according to the present invention, as the upper and lower polishing halves change, the spherical lens raw material is polished in the vertical direction, thereby increasing the polishing precision and improving the production efficiency. has the advantage of

In addition, the upper and lower wheel wheels rotate in different directions, which has the advantage of further improving processing precision.

In addition, it has the advantage of improving the uniformity of the spherical lens raw material and increasing the polishing efficiency by simultaneously rotating the upper plate while moving it in the lateral direction.

In addition, through the first cutting oil hole of the upper table, the second cutting oil hole and the lens hole are introduced, and the introduced cutting oil is easily discharged through the cutting oil discharge hole of the outer ring jig, thereby increasing the fluidity of the cutting oil.

As described above, the present invention has been shown and described with preferred embodiments, but is not limited to the above embodiments, and to those skilled in the art within the scope of not departing from the spirit of the present invention Various changes and modifications will be possible.

T: Table 10: Lower table
20: rotating part 21: rotating ring
22: guide ring 23: upper table
30: rotation unit driving device 110: lower table
111: lower half body 112: lower part
113: lower polishing layer 120: upper plate
121: upper polishing layer 122: first coolant hole
130: outer ring jig 131: cutting oil discharge hole
140: inner ring jig 141: second coolant hole
142: lens hole 150: inner ring holder
151: individual lens hole 160: phase-reversal rotation driving means
161: central axis 170: pressing means

Claims (8)

a lower plate-shaped body; a concave portion having a disk shape having a diameter smaller than that of the lower surface plate body and integrally extending from an upper portion of the lower surface plate body; and a lower polishing layer provided on an upper surface of the concave portion in a circular ring shape, the lower surface plate being rotatably provided with respect to the central axis of the lower surface plate body;
an upper table having a disk shape and having an upper abrasive layer on a lower surface; and
Including; an outer ring jig provided in a circular ring shape and installed by being inserted into the recessed portion,
When the lower polishing plate is rotated, the upper polishing plate is rotated together, so that a plurality of spherical lens raw materials located between the lower polishing layer and the upper polishing layer are moved up and down by the lower polishing layer and the upper polishing layer. Spherical freeform lens polishing apparatus, characterized in that the polishing process.
According to claim 1,
A spherical preform lens, characterized in that further comprising a rotation driving means for rotating the upper table with the center of the upper table as a central axis, wherein the rotation driving means rotates the upper table in a direction different from that of the lower table. polishing device.
According to claim 1,
The outer ring jig
A plurality of cutting oil discharge holes penetrating in the lateral direction are formed, the cutting oil discharge holes are located above the lower polishing layer, and the cutting oil flowing into the inside is discharged to the outside. .
According to claim 3,
Further comprising: an inner ring jig having a ring shape with a second cutting oil hole formed in the center, a plurality of lens holes penetrating in the vertical direction, and fitted into the center hole of the outer ring jig;
The spherical preform lens polishing apparatus, characterized in that the spherical lens raw materials are placed on the lower polishing layer through the lens holes.
According to claim 4,
The spherical preform lens polishing device further comprising an inner ring holder inserted into the lens hole and formed with a plurality of individual lens holes into which the spherical lens raw material is respectively inserted.
According to claim 4,
The upper half of the above
At least one first cutting oil hole penetrating in the vertical direction at the center of the upper table; is provided,
The spherical freeform lens polishing device, characterized in that the cutting oil is introduced into the second cutting oil hole and the lens hole through the first cutting oil hole and then discharged to the outside through the cutting oil discharge hole.
According to claim 2,
The spherical preform lens polishing device of claim 1, further comprising a pressing means for applying a load to the upper table plate in a downward direction so that the lens raw materials are pressed.
According to claim 2,
The spherical freeform lens polishing device, characterized in that the upper surface plate is provided to be rotatable while moving in a lateral direction orthogonal to the central axis.

Images