Porous machining and grinding mechanism for spherical lens

Abstract

The utility model discloses a multi-hole processing grinding mechanism for spherical lenses, which comprises a clamp and a grinding rod, the lower surface of the clamp is a curvature surface and is provided with a plurality of groups of counter bores, the plurality of groups of counter bores are annularly arranged on the lower surface of the clamp at equal intervals, and a cylindrical spherical lens with one end being a plane and the other end being a curvature surface is placed in each counter bore. The curvature surface of the spherical lens protrudes out of the counter bore; the upper surface of the grinding rod is a curvature surface matched with the lower surface of the clamp, and an annular loading layer used for grinding the curvature surface of the spherical lens is arranged on the upper surface of the grinding rod. According to the utility model, a plurality of spherical lenses can be clamped at one time for synchronous processing, and each lens is subjected to uniform grinding force in the processing process, so that the processing efficiency is improved, and the quality stability of the lenses is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of spherical lens processing jigs, in particular to a multi-hole processing and grinding mechanism for spherical lenses. Background Art

[0002] In the process of processing the spherical surface of lenses with large curvature, in order to improve processing efficiency, several lenses are usually clamped at a time for synchronous processing. For example, several lenses are bonded into a disc and processed using the grinding tool on the processing machine, or 3 or 5 lenses are loaded into the corresponding holes of a multi-hole clamping fixture for processing. Compared with the method of bonding into a disc, the latter not only simplifies the process, but also makes it easier to ensure the stability of the lens quality.

[0003] However, the above method also has certain limitations, especially when the contact area between the clamping fixture and the processing tool is increased to accommodate the clamping of multiple lenses, it is difficult to ensure that the force on the entire grinding contact surface is uniform (for example, the force on the lens at the center and edge of the clamping fixture is inconsistent), which may lead to unstable quality of the processed lens and affect the imaging effect of the lens. Based on the swing amplitude of the existing processing tools, it is necessary to design a clamping fixture that can effectively clamp multiple lenses to achieve efficient processing. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a multi-hole processing and grinding mechanism for spherical lenses that is easy to disassemble and assemble, which is used to clamp multiple spherical lenses at one time for synchronous processing, and to make each lens receive uniform grinding force during the processing.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model provides a multi-hole processing and grinding mechanism for a spherical lens, comprising a fixture and a grinding rod, wherein the lower surface of the fixture is a curvature surface and is provided with a plurality of countersunk holes, the plurality of countersunk holes are arranged in a ring at equal intervals on the lower surface of the fixture, and a cylindrical spherical lens with a flat end and a curvature surface at the other end is placed in each countersunk hole, the curvature surface of the spherical lens protrudes from the countersunk hole; the upper surface of the grinding rod is a curvature surface that matches the lower surface of the fixture, and an annular loading layer for grinding the curvature surface of the spherical lens is provided on the upper surface of the grinding rod.

[0006] Wherein, a V-shaped groove for placing a pressure head is provided at the center of the upper surface of the clamp.

[0007] Wherein, a sleeve is provided between the spherical lens and the countersunk hole, and the sleeve is a cylindrical structure with an open upper end and a hollow interior.

[0008] The clearance between the outer ring of the sleeve and the inner wall of the countersunk hole is in the range of 0.01 to 0.02 mm, and the upper end of the sleeve protrudes from the countersunk hole.

[0009] The gap between the outer ring of the spherical lens and the inner wall of the sleeve is in the range of 0.05 to 0.1 mm, and the upper surface of the spherical lens protrudes from the upper end of the sleeve.

[0010] Wherein, a cylinder is provided at the center of the lower surface of the grinding rod for clamping it on the processing machine tool.

[0011] The width of the annular loading layer is greater than the diameter of a single countersunk hole, and the outer ring line and the inner ring line of the annular loading layer are respectively located on two sides of the circular ring formed by the multiple groups of countersunk holes.

[0012] When the multiple groups of spherical lenses swing leftward following the pressure head, the leftmost side of the outer ring line of the ring formed by the multiple groups of spherical lenses protrudes from the leftmost side of the outer ring line of the annular loading layer by 1 to 2 mm.

[0013] When the multiple groups of spherical lenses swing rightward following the pressure head, the leftmost side of the inner ring line of the ring formed by the multiple groups of spherical lenses protrudes from the leftmost side of the inner ring line of the annular loading layer by 1 to 2 mm.

[0014] Beneficial effects: The utility model has the following advantages: 1. The mechanism has a simple structure and can clamp multiple spherical lenses at one time, which is suitable for batch processing of spherical lenses with high efficiency;

[0015] 2. Based on the left and right swing amplitude of the pressure head, the mechanism arranges multiple groups of countersunk holes for placing spherical lenses in an annular manner on the lower surface of the fixture in an evenly spaced manner, and uses an annular loading layer that can cover the surface of all countersunk holes to grind the spherical lenses in the countersunk holes, so that the force on the entire grinding contact surface is uniform, improving processing efficiency and ensuring the quality stability of the lenses, and solving the problem that multiple spherical lenses cannot be clamped in order to ensure the quality of the lenses in the prior art;

[0016] 3. This mechanism uses a sleeve to fix multiple groups of spherical lenses on the fixture, replacing the method of using adhesive to fix the spherical lenses, effectively preventing the polishing liquid from being contaminated by the adhesive and causing damage to the appearance of the spherical lenses, thereby ensuring the quality of the lenses;

[0017] 4. Fix the pressure head at the concave point on the upper surface of the fixture, so that the fixture holding the spherical lens is in contact with the annular loading layer of the grinding rod, so that the surface to be processed of the spherical lens is in full contact with the annular loading layer for grinding, avoiding the problem of severe shaking or inability to clamp a single spherical lens directly for processing, which affects the processing accuracy, thereby improving the grinding accuracy of the spherical lens surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the multi-hole processing grinding mechanism;

[0019] Figure 2It is a schematic diagram of the position of the outer ring line of the ring formed by the multiple groups of cylindrical lenses when the multiple groups of cylindrical lenses follow the pressure head to swing to the left;

[0020] Figure 3 It is a schematic diagram of the position of the inner ring line of the ring formed by the multiple groups of cylindrical lenses when the multiple groups of cylindrical lenses follow the pressure head to swing to the right. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is described in detail below in conjunction with the embodiments and drawings.

[0022] like Figure 1 As shown, the multi-hole processing grinding mechanism includes a circular fixture 1 and a grinding rod 4. The circular fixture 1 is made of metal, preferably stainless steel, and has a curvature surface on the lower surface and is provided with a plurality of countersunk holes, which are arranged in a circular manner at equal intervals on the lower surface of the fixture 1, and a V-shaped groove is provided in the center of the upper surface.

[0023] In the countersink, there is a cylindrical sleeve 3 with an open top and a hollow interior, which is made of plastic, preferably white steel. The gap between the outer ring of the sleeve 3 and the inner wall of the countersink is 0.01-0.02 mm, and the upper end of the sleeve 3 protrudes from the countersink.

[0024] A cylindrical lens 2 (one end is a flat surface and the other end is a curvature surface) is placed in each sleeve 3, the gap between the outer ring of the cylindrical lens 2 and the inner wall of the sleeve 3 is in the range of 0.05-0.1 mm, and the upper surface of the cylindrical lens 2 protrudes from the upper end of the sleeve 3. At the same time, the minimum thickness of the lens after the curvature surface of the cylindrical lens 2 is processed (the minimum thickness of the plano-concave lens is the center thickness, and the minimum thickness of the plano-convex lens) is also greater than the internal depth of the sleeve 3, so as to prevent the upper and lower surfaces of the cylindrical lens 2 from affecting the sleeve 3 during the processing.

[0025] The grinding rod 4 is a disc surface made of metal, and a cylinder is provided at the center of the lower surface, which is used to clamp the grinding rod 4 on the processing machine tool. The grinding rod 4 will rotate around the axis when driven by the processing machine tool. The upper surface of the grinding rod 4 is a curvature surface adapted to the lower surface of the circular fixture 1 (that is, the curvature value is the same, but the direction is opposite). The upper surface of the grinding rod 4 is provided with an annular loading layer 5, and the annular loading layer 5 is a circular ring with a certain width (the shortest distance between the outer ring line and the inner ring line). The width of the annular loading layer 5 is greater than the diameter of a single countersunk hole, and the outer ring line and the inner ring line of the annular loading layer 5 are respectively located on both sides of the circular ring composed of multiple groups of countersunk holes, that is, the surface of the annular loading layer 5 can completely cover the surface of the circular ring composed of multiple groups of countersunk holes.

[0026] The annular loading layer 5 is a polyurethane polishing material with a thickness of 0.5 mm. It is used for synchronous grinding of the curvature surfaces of multiple groups of lenses clamped in the countersunk holes of the circular fixture 1. The grinding method is: the grinding rod 4 is fixed on the processing machine tool and rotates around the axis driven by the processing machine tool. The fixture 1 equipped with the lens 2 is placed on the upper surface of the grinding rod 4, so that the multiple groups of cylindrical lenses 2 are placed on the annular loading layer 5 (that is, the center ring line of the ring composed of multiple groups of cylindrical lenses 2 is aligned with the center ring line of the annular loading layer 5, and the center ring line refers to the ring line on the ring with the same shortest distance from the outer ring line and the inner ring line). The pressure head that swings left and right with a certain amplitude is pressed down into the central V-groove on the upper surface of the fixture 1, and the pressure head is started to make the fixture 1 swing left and right following the pressure head, thereby driving all the cylindrical lenses 2 to be ground on the annular loading layer 5.

[0027] The relationship between the width of the annular loading layer 5, the diameter of the cylindrical lens 2 and the amplitude of the left-right swing following the pressure head is as follows: when the multiple groups of cylindrical lenses 2 swing leftward following the pressure head, the outer ring line 6 (such as Figure 2 The leftmost side of the dotted line (marked with 6) protrudes 1-2mm from the leftmost side of the outer ring line of the annular loading layer 5. When the multiple groups of cylindrical lenses 2 swing to the right following the pressure head, the inner ring line 7 (such as Figure 3 The leftmost side of the dotted line (marked with number 7) protrudes from the leftmost side of the inner ring line of the annular loading layer 5 by 1-2 mm.

[0028] Taking the plano-concave cylindrical lens 2 as an example, the working principle of the multi-hole processing and grinding mechanism is as follows:

[0029] 1. Wrap the cylindrical surface of the plano-concave cylindrical lens 2 with flannel and put it into the sleeve 3, and then put the sleeve 3 into the countersunk hole of the fixture 1 one by one. The lower surface of the fixture 1 is a concave surface, and the curvature radius is similar to the curved surface of the plano-concave cylindrical lens 2;

[0030] 2. Put the fixture 1 filled with the plano-concave cylindrical lens 2 into water, so that the gaps between the plano-concave cylindrical lens 2 and the sleeve 3, and between the sleeve 3 and the fixture 1 are fully filled with water. The adsorption force of water can help fix the sleeve 3 and the plano-concave cylindrical lens 2. When the fixture 1 is inverted, the sleeve 3 and the plano-concave cylindrical lens 2 are not easy to fall off from the bottom plate 1;

[0031] 3. Fix the grinding rod 4 on the processing machine through the cylinder below it, and stick the annular loading layer 5 on the upper surface of the grinding rod 4; the upper surface of the grinding rod 4 is a convex surface, and the radius of curvature is the same as that of the lower surface of the fixture 1;

[0032] 4. Place the entire fixture 1 on the upper surface of the grinding rod 4, so that all the plano-concave cylindrical lenses 2 are aligned and placed on the annular loading layer 5, press the pressure head into the V-shaped groove on the upper surface of the chassis 1, start the pressure head, and make the fixture 1 swing left and right following the pressure head, thereby driving all the cylindrical lenses 2 to be ground on the annular loading layer 5.

[0033] Taking the plano-convex cylindrical lens 2 as an example, the working principle of the multi-hole processing and grinding mechanism is as follows:

[0034] 1. Wrap the cylindrical surface of the planoconvex cylindrical lens 2 with flannel and put it into the sleeve 3, then put the sleeve 3 into the countersunk hole of the fixture 1 one by one. The lower surface of the fixture 1 is a convex surface, and the radius of curvature is similar to the curved surface of the planoconvex cylindrical lens 2; 2. Put the fixture 1 filled with planoconvex cylindrical lenses 2 into water, so that the gaps between the planoconvex cylindrical lens 2 and the sleeve 3, and between the sleeve 3 and the fixture 1 are fully filled with water. The adsorption force of water can help fix the sleeve 3 and the planoconvex cylindrical lens 2. When the fixture 1 is inverted, the sleeve 3 and the planoconvex cylindrical lens 2 are not easy to fall off from the bottom plate 1;

[0035] 3. Fix the grinding rod 4 on the processing machine through the cylinder below it, and stick the annular loading layer 5 on the upper surface of the grinding rod 4; the upper surface of the grinding rod 4 is a concave surface, and the radius of curvature is the same as that of the lower surface of the fixture 1;

[0036] 4. Place the entire fixture 1 on the upper surface of the grinding rod 4, so that all the plano-convex cylindrical lenses 2 are aligned and placed on the annular loading layer 5, press the pressure head into the V-shaped groove on the upper surface of the chassis 1, start the pressure head, and make the fixture 1 swing left and right following the pressure head. The grinding rod 4 rotates synchronously around the axis driven by the processing machine, thereby driving all the cylindrical lenses 2 to be ground on the annular loading layer 5.

Claims

1. A multi-hole processing and grinding mechanism for a spherical lens, characterized in that: The invention comprises a fixture (1) and a grinding rod (4), wherein the lower surface of the fixture (1) is a curvature surface and is provided with a plurality of countersunk holes, the plurality of countersunk holes are arranged in a ring at equal intervals on the lower surface of the fixture (1), a cylindrical spherical lens (2) having a flat surface at one end and a curvature surface at the other end is placed in each countersunk hole, and the curvature surface of the spherical lens (2) protrudes from the countersunk hole; the upper surface of the grinding rod (4) is a curvature surface matching the lower surface of the fixture (1), and an annular loading layer (5) for grinding the curvature surface of the spherical lens (2) is provided on the upper surface of the grinding rod (4).

2. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: A V-shaped groove for placing a pressure head is provided at the center of the upper surface of the clamp (1).

3. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: A sleeve (3) is provided between the spherical lens (2) and the countersunk hole, and the sleeve (3) is a cylindrical structure with an open upper end and a hollow interior.

4. The multi-hole processing and grinding mechanism for a spherical lens according to claim 3, characterized in that: The clearance between the outer ring of the sleeve (3) and the inner wall of the countersunk hole is in the range of 0.01 to 0.02 mm, and the upper end of the sleeve (3) protrudes from the countersunk hole.

5. The multi-hole processing and grinding mechanism for a spherical lens according to claim 3, characterized in that: The gap between the outer ring of the spherical lens (2) and the inner wall of the sleeve (3) is in the range of 0.05 to 0.1 mm, and the upper surface of the spherical lens (2) protrudes from the upper end of the sleeve (3).

6. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: A cylinder is provided at the center of the lower surface of the grinding rod (4) for clamping it on the processing machine.

7. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: The width of the annular loading layer (5) is greater than the diameter of a single countersunk hole, and the outer ring line and the inner ring line of the annular loading layer (5) are respectively located on two sides of the circular ring formed by the multiple groups of countersunk holes.

8. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: When the multiple groups of spherical lenses (2) swing leftward following the pressure head, the leftmost side of the outer ring line (6) of the ring formed by the multiple groups of spherical lenses (2) protrudes from the leftmost side of the outer ring line of the annular loading layer (5) by 1 to 2 mm.

9. The multi-hole processing and grinding mechanism for a spherical lens according to claim 1, characterized in that: When the multiple groups of spherical lenses (2) swing rightward following the pressure head, the leftmost side of the inner ring line (7) of the ring formed by the multiple groups of spherical lenses (2) protrudes from the leftmost side of the inner ring line of the annular loading layer (5) by 1 to 2 mm.

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