An ultra-precision turning fixture for processing double-sided mirror lenses

Abstract

The utility model discloses a kind of ultra-precision turning clamps for processing double-sided mirror, including the clamping body of inside hollow structure and positioning column, the double-sided mirror piece workpiece to be processed is placed in the inside of clamping body, the both ends of clamping body are respectively equipped with detachable first connecting disc and second connecting disc, the both ends of double-sided mirror piece workpiece are respectively equipped with A surface mirror and B surface mirror, and A surface mirror and second connecting disc are located at the same end of clamping body, B surface mirror and first connecting disc are located at the same end of clamping body, double-sided mirror piece workpiece center is equipped with rotary through-hole, positioning column is glued and penetrated in rotary through-hole;When A surface mirror needs to be turned, remove second connecting disc, positioning column is connected with first connecting disc;When B surface mirror needs to be turned, remove first connecting disc, positioning column is connected with second connecting disc.The utility model has the characteristics of compact structure, convenient operation, high reliability, improves the turning efficiency of double-sided mirror piece workpiece.

Description

Technical Field

[0001] This utility model relates to the field of ultra-precision optical component processing technology, specifically to an ultra-precision turning fixture for processing double-sided lenses. Background Technology

[0002] With the continuous development of modern science and technology, the requirements for the precision and complexity of optical components are increasing. Optical components with complex structures and high precision requirements often become key factors affecting system performance. The processing and manufacturing of such components is challenging, making the overall processing technology particularly important. Currently, in addition to traditional physical grinding methods, advanced manufacturing processes such as magnetorheological machining and ion beam polishing are gradually being applied. With the emergence of new processes, the lightweight, simplification, and multifunctionality of fixtures have become crucial aspects of the overall processing. Therefore, designing a fixture capable of processing two types of mirrors simultaneously not only aligns with current technological trends but also effectively ensures processing accuracy, simplifies the operation process, and reduces the risk of mirror breakage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an ultra-precision turning fixture for processing double-sided lenses that is compact, easy to operate and highly reliable, in order to overcome the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An ultra-precision turning fixture for machining double-sided lenses includes a fixture body with a hollow internal structure and a positioning post. The double-sided lens workpiece to be machined is placed inside the fixture body. The fixture body has a detachable first connecting plate and a second connecting plate at each end. The double-sided lens workpiece has an A-side lens and a B-side lens at each end, with the A-side lens and the second connecting plate located at the same end of the fixture body, and the B-side lens and the first connecting plate located at the same end of the fixture body. The double-sided lens workpiece has a rotating through hole at its center, and the positioning post is glued through the rotating through hole. When the A-side lens needs to be turned, the second connecting plate is removed, and the positioning post connects to the first connecting plate to clamp the double-sided lens workpiece inside the fixture body. When the B-side lens needs to be turned, the first connecting plate is removed, and the positioning post connects to the second connecting plate to clamp the double-sided lens workpiece inside the fixture body.

[0005] As a further improvement of this utility model, the outer surface of the first connecting plate is provided with a plurality of first threaded through holes and a plurality of first threaded countersunk holes. The first threaded through holes are used to realize the connection between the first connecting plate and the fixture on the turning machine tool, and the first threaded countersunk holes are used to realize the connection between the first connecting plate and the fixture body.

[0006] As a further improvement of this utility model, the inner surface of the first connecting plate is provided with a first threaded blind hole, which is used to connect the first connecting plate with the positioning post.

[0007] As a further improvement of this utility model, the outer surface of the second connecting plate is provided with a plurality of second threaded through holes and a plurality of second threaded countersunk holes. The second threaded through holes are used to realize the connection between the second connecting plate and the fixture on the turning machine tool, and the second threaded countersunk holes are used to realize the connection between the second connecting plate and the fixture body.

[0008] As a further improvement of this utility model, the inner surface of the second connecting plate is provided with a second threaded blind hole, which is used to connect the second connecting plate with the positioning post.

[0009] As a further improvement of this utility model, a long screw is provided between the positioning post and the first threaded blind hole or the second threaded blind hole.

[0010] As a further improvement of this utility model, the diameter of the first connecting plate is larger than the diameter of the clamp body, the diameter of the second connecting plate is smaller than the diameter of the clamp body, the first connecting plate is connected to one end of the clamp body, and the second connecting plate is nested in the other end of the clamp body.

[0011] As a further improvement of this utility model, a limiting ring is provided at one end of the fixture body, the second connecting disc is nested on the top of the limiting ring, and the A-side lens is nested inside the limiting ring.

[0012] Compared with the prior art, the advantages of this utility model are: This invention relates to an ultra-precision turning fixture for processing double-sided lenses. The fixture has a hollow internal body with detachable first and second connecting plates at both ends. The double-sided lens workpiece is placed inside the fixture body, and a positioning pin is glued into the rotating through-hole of the workpiece. When the A-side of the workpiece needs turning, the first connecting plate is removed, and the positioning pin is connected to the second connecting plate, thus clamping the workpiece inside the fixture body for turning. When the B-side of the workpiece needs turning, the second connecting plate is removed, and the positioning pin is connected to the first connecting plate, clamping the workpiece inside the fixture body for turning. This invention uses a single fixture to meet the processing requirements of double-sided lenses. The positioning pin reliably fixes the optical components to the connecting plates, ensuring effective fixation of the mirror during processing. This significantly improves the processing accuracy of the double-sided lens workpiece, reduces the risk of the workpiece falling during transit, and helps improve overall processing efficiency and reduce manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the ultra-precision turning fixture in a specific embodiment of this utility model; Figure 2 This is a bottom view schematic diagram of the structure principle of the ultra-precision turning fixture in a specific embodiment of this utility model; Figure 3 This is a top view schematic diagram of the ultra-precision turning fixture in a specific embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the structural principle of the double-sided lens workpiece in a specific embodiment of this utility model; Figure 5 This is a cross-sectional view of a double-sided lens workpiece A being machined using an ultra-precision turning fixture in a specific embodiment of this utility model. Figure 6 This is a cross-sectional view of the ultra-precision turning fixture used to process surface B of a double-sided lens workpiece in a specific embodiment of this utility model. Legend: 1. Fixture body; 11. Limiting ring; 2. First connecting plate; 21. First threaded through hole; 22. First threaded countersunk hole; 23. First threaded blind hole; 3. Second connecting plate; 31. Second threaded through hole; 32. Second threaded countersunk hole; 33. Second threaded blind hole; 4. Double-sided mirror workpiece; 41. A-side mirror; 42. B-side mirror; 43. Rotary through hole; 5. Positioning pin; 51. Long screw; 52. Limiting platform. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0015] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0017] Example like Figures 1 to 6 As shown, this utility model discloses an ultra-precision turning fixture for machining double-sided lenses, comprising a fixture body 1 with a hollow internal structure and a positioning post 5. The double-sided lens workpiece 4 to be machined is placed inside the fixture body 1. The fixture body 1 has a detachable first connecting plate 2 and a second connecting plate 3 at both ends, and the double-sided lens workpiece 4 has an A-side lens 41 and a B-side lens 42 at both ends. When the double-sided lens workpiece 4 is placed inside the fixture body 1, the A-side lens 41 and the second connecting plate 3 are located at the same end of the fixture body 1, and the B-side lens 42 and the first connecting plate 2 are located at the same end of the fixture body 1. The double-sided lens workpiece 4 has a rotating through hole 43 at its center, and the positioning post 5 is glued through the rotating through hole 43. Figure 5 As shown, when the A-side lens 41 needs to be machined, the second connecting plate 3 is removed, and the positioning pin 5 is connected to the first connecting plate 2, thus clamping the double-sided lens workpiece 4 inside the fixture body 1. Figure 6 As shown, when the B-side lens 42 needs to be machined, the first connecting plate 2 is removed and the positioning pin 5 is connected to the second connecting plate 3, thus clamping the double-sided lens workpiece 4 inside the fixture body 1.

[0018] like Figure 2 As shown, the outer surface of the first connecting plate 2 is uniformly provided with a plurality of first threaded through holes 21 and a plurality of first threaded countersunk holes 22, and the first threaded through holes 21 and the first threaded countersunk holes 22 are arranged at intervals, with the first threaded countersunk holes 22 close to the outer edge of the first connecting plate 2. The first threaded through holes 21 are used to connect the first connecting plate 2 to the fixture on the turning machine tool, and the first threaded countersunk holes 22 are used to connect the first connecting plate 2 to the fixture body 1, so as to realize the connection between the ultra-precision turning fixture and the fixture on the turning machine tool.

[0019] like Figure 5 As shown, the inner surface of the first connecting plate 2 is provided with a first threaded blind hole 23. A long screw 51 is screwed into the first threaded blind hole 23 to connect the first connecting plate 2 with the positioning post 5.

[0020] like Figure 3As shown, the outer surface of the second connecting plate 3 is uniformly provided with a plurality of second threaded through holes 31 and a plurality of second threaded countersunk holes 32, and the second threaded through holes 31 and the second threaded countersunk holes 32 are arranged at intervals, with the second threaded countersunk holes 32 close to the outer edge of the second connecting plate 3. The second threaded through holes 31 are used to connect the second connecting plate 3 to the fixture on the turning machine tool, and the second threaded countersunk holes 32 are used to connect the second connecting plate 3 to the fixture body 1, so as to realize the connection between the ultra-precision turning fixture and the fixture on the turning machine tool.

[0021] like Figure 6 As shown, the inner surface of the second connecting plate 3 is provided with a second threaded blind hole 33. A long screw 51 is screwed into the second threaded blind hole 33 to connect the second connecting plate 3 with the positioning post 5.

[0022] In this embodiment, limiting platforms 52 are also provided at both ends of the positioning post 5 to limit the end of the long screw 51, thereby improving the connection stability between the positioning post 5 and the first connecting plate 2 or the second connecting plate 3. Furthermore, the through hole inside the positioning post 5 can be set as a threaded hole, that is, the long screw 51 is threadedly connected to both the positioning post 5 and the first connecting plate 2 or the second connecting plate 3.

[0023] like Figure 1 As shown, the diameter of the first connecting plate 2 is larger than the diameter of the fixture body 1, and the diameter of the second connecting plate 3 is smaller than the diameter of the fixture body 1. The first connecting plate 2 is connected to one end of the fixture body 1, and the second connecting plate 3 is nested in the other end of the fixture body 1. Correspondingly, the diameter of the A-side lens 41 is smaller than the diameter of the B-side lens 42, and the diameter of the B-side lens 42 matches the inner diameter of the fixture body 1, so as to enable the double-sided lens workpiece 4 to smoothly enter and exit the fixture body 1 without damaging the double-sided lens workpiece 4.

[0024] like Figure 5 and Figure 6 As shown, a limiting ring 11 is provided at one end of the fixture body 1, the second connecting plate 3 is nested on the top of the limiting ring 11, and the A-side lens 41 is nested on the stepped surface inside the limiting ring 11 to improve the connection stability of the double-sided lens workpiece 4 in the fixture body 1.

[0025] The ultra-precision turning fixture of this embodiment is used for the turning of the PL experimental mirror - main four mirrors, that is, the double-sided lens workpiece 4 is the PL experimental mirror - main four mirrors. Figure 4 As shown, both the top and bottom surfaces of the double-sided lens workpiece 4 need to be machined. The turning method specifically includes the following steps: Step S1: Process the A-side lens 41. First, disassemble the second connecting plate 3. Then, fix the double-sided lens workpiece 4 onto the fixture body 1 by adhesive. The adhesive should be even and there should be no local missed adhesive. The adhesive needs to be cured with a curing device.

[0026] Step S2: After the double-sided lens workpiece 4 is initially positioned by adhesive bonding, the first connecting plate 2 is connected to the fixture body 1 through the first threaded countersunk hole 22. Then, the positioning pin 5 is threadedly connected to the first connecting plate 2 through the first threaded blind hole 23 and the long screw 51. The positioning pin 5 is then bonded to the rotary through hole 43 of the double-sided lens workpiece 4. The adhesive block must meet the adhesive bonding requirements in step S1 before proceeding to the next step.

[0027] Step S3: Connect the first connecting plate 2 to the fixture on the single-point turning machine tool through the first threaded through hole 21 with screws. Perform necessary geometric tolerance measurements on the fixture and find the center position. After the data is correct, start machining the A-side lens 41.

[0028] Step S4: After processing the A-side lens 41, remove the fixture directly. Perform some pre-processing on the B-side lens 42 on the worktable, disassemble the first connecting plate 2, remove the rubber block of the positioning post 5, and connect the second connecting plate 3 to the fixture body 1 through the second threaded countersunk hole 32.

[0029] Step S5: Connect and fix the positioning post 5 and the second connecting plate 3 through the second threaded blind hole 33 screw, and glue the positioning post 5 to the rotary through hole 43 of the double-sided lens workpiece 4. The gluing requirements are the same as above.

[0030] Step S6: Connect the second connecting plate 3 to the fixture on the single-point turning machine tool through the second threaded through hole 31 with screws. Perform necessary geometric tolerance measurements on the fixture and find the center position. After the data is correct, start machining the B-side lens 42.

[0031] Step S7: Remove the fixture, measure the surface accuracy of lens A 41 and lens B 42, and if the inspection is qualified, the processing is completed.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An ultra-precision turning fixture for machining double-sided lenses, characterized in that, The fixture includes a hollow internal fixture body (1) and a positioning post (5). The double-sided lens workpiece (4) to be processed is placed inside the fixture body (1). The two ends of the fixture body (1) are respectively provided with a detachable first connecting plate (2) and a second connecting plate (3). The two ends of the double-sided lens workpiece (4) are respectively provided with an A-side lens (41) and a B-side lens (42). The A-side lens (41) and the second connecting plate (3) are located at the same end of the fixture body (1), and the B-side lens (42) and the first connecting plate (2) are located at the same end of the fixture body (1). The double-sided lens workpiece (4) has a rotating through hole (43) in the center, and the positioning post (5) is glued through the rotating through hole (43). When the A-side lens (41) needs to be machined, the second connecting plate (3) is removed, and the positioning post (5) is connected to the first connecting plate (2) so that the double-sided lens workpiece (4) is clamped inside the fixture body (1). When the B-side lens (42) needs to be machined, the first connecting plate (2) is removed, and the positioning post (5) is connected to the second connecting plate (3) so that the double-sided lens workpiece (4) is clamped inside the fixture body (1).

2. The ultra-precision turning fixture for machining double-sided lenses according to claim 1, characterized in that, The outer surface of the first connecting plate (2) is provided with a plurality of first threaded through holes (21) and a plurality of first threaded countersunk holes (22). The first threaded through holes (21) are used to connect the first connecting plate (2) to the fixture on the turning machine tool, and the first threaded countersunk holes (22) are used to connect the first connecting plate (2) to the fixture body (1).

3. The ultra-precision turning fixture for machining double-sided lenses according to claim 2, characterized in that, The inner surface of the first connecting plate (2) is provided with a first threaded blind hole (23), which is used to connect the first connecting plate (2) with the positioning post (5).

4. The ultra-precision turning fixture for machining double-sided lenses according to claim 2, characterized in that, The outer surface of the second connecting plate (3) is provided with a plurality of second threaded through holes (31) and a plurality of second threaded countersunk holes (32). The second threaded through holes (31) are used to connect the second connecting plate (3) to the fixture on the turning machine tool, and the second threaded countersunk holes (32) are used to connect the second connecting plate (3) to the fixture body (1).

5. The ultra-precision turning fixture for machining double-sided lenses according to claim 3, characterized in that, The inner surface of the second connecting plate (3) is provided with a second threaded blind hole (33), which is used to connect the second connecting plate (3) with the positioning post (5).

6. The ultra-precision turning fixture for machining double-sided lenses according to claim 5, characterized in that, The positioning pin (5) is connected to the first threaded blind hole (23) or the second threaded blind hole (33) by a long screw (51).

7. The ultra-precision turning fixture for machining double-sided lenses according to any one of claims 1 to 6, characterized in that, The diameter of the first connecting disc (2) is greater than the diameter of the fixture body (1), and the diameter of the second connecting disc (3) is smaller than the diameter of the fixture body (1). The first connecting disc (2) is connected to one end of the fixture body (1), and the second connecting disc (3) is nested in the other end of the fixture body (1).

8. The ultra-precision turning fixture for machining double-sided lenses according to claim 7, characterized in that, One end of the fixture body (1) is provided with a limiting ring (11), the second connecting disk (3) is nested on the top of the limiting ring (11), and the A-side lens (41) is nested inside the limiting ring (11).

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