Free-form surface lens polishing accurate positioning structure

Abstract

The utility model discloses an accurate positioning structure for free-form surface lens polishing, and particularly relates to the field of free-form surface lens machining equipment. The sleeve is fixed on the base; the supporting part comprises a positioning rod and supporting rods, one end of the positioning rod is fixedly connected with the base, the other end of the positioning rod extends out of the sleeve, the same-direction ends of the supporting rods are arranged on the peripheral side of the positioning rod, and the other ends of the supporting rods extend out of the sleeve; the adjusting part is arranged in the sleeve and used for driving the supporting rod to be opened and closed with the positioning rod as the center; and the supporting part is arranged on the inner sides of the supporting rods and used for clamping the supporting rods from the inner side and the outer side together with the sleeve, the clamping and positioning processes of free-form surface lenses with different sizes and curvatures are adapted by changing the opening sizes of the supporting rods, and the interference of grinding force on the stability of the free-form surface wafer in the grinding process is reduced.

Description

Technical Field

[0001] The utility model relates to the field of free-form surface lens processing equipment, and more specifically, to a free-form surface lens grinding and precise positioning structure. Background Art

[0002] During the processing of free-form surface lenses, the edges will be affected by the processing and there will be defects. It is necessary to use a grinding device to grind the edges of the free-form surface lenses. For example, the device structure recorded in the Chinese patent with publication number CN 218984224 U, after repeated operation, it was concluded that the clamping and positioning method of the device for the free-form surface lenses is prone to instability, especially when the free-form surface lenses are subjected to unbalanced grinding forces during the processing, the clamping mechanism in the above patent cannot effectively maintain the balance stability of the clamping. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a precise positioning structure for grinding free-form surface lenses. The technical problem to be solved by the utility model is: how to improve the clamping stability of free-form surface lenses.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a free-form surface lens grinding and precise positioning structure, comprising a base, mounted on a frame of a grinder; a sleeve, fixed on the base; a support portion, comprising a positioning rod and a support rod, wherein one end of the positioning rod is fixedly connected to the base and the other end extends out of the sleeve, and the same-direction ends of a plurality of support rods are placed on the circumference of the positioning rod, and the other end extends out of the sleeve; an adjustment portion, placed inside the sleeve, for driving the support rod to open and close with the positioning rod as the center; a support portion, placed on the inner side of a plurality of support rods, for clamping the support rods from both the inner and outer sides together with the sleeve.

[0005] In a preferred embodiment, the adjustment part includes a supporting platform and a stop assembly. The supporting platform is elastically and slidably connected to the outer side of the positioning rod. Several support rods are fixed on the end surface of the supporting platform. The supporting platform is connected to a stop assembly for limiting the movement of the supporting platform.

[0006] In a preferred embodiment, the stop assembly includes a flap and a clamping hole. A plurality of clamping holes are provided on the sleeve. The flap is hinged on the support platform. The flap is located on the outside of the sleeve. A groove for the flap to slide is provided on the sleeve. A convex pin that engages with the clamping hole is fixed on the flap.

[0007] In a preferred embodiment, the stopping assembly includes a bolt and a locking nut. The bolt is fixedly connected to the supporting platform. The supporting platform slides against the inner wall of the sleeve. The sleeve is provided with a sliding groove for the bolt to slide. A locking nut is provided on the outside of the sleeve and is tightly connected to the bolt.

[0008] In a preferred embodiment, the adjustment part is a threaded sleeve, an external thread is provided on the outer side of the sleeve, the sleeve and the threaded sleeve are threadedly connected, the outer edge of the support rod abuts against the top of the threaded sleeve, and the support rod and the positioning rod are fixed to the base together.

[0009] In a preferred embodiment, the support portion is a symmetrical branch, which includes symmetrically arranged elastic units. Each elastic unit includes a ring and a plurality of elastic plates. The number of elastic plates is equal to the number of support rods. The elastic plates are elastically connected to the circumferential side of the ring, and the two symmetrical rings are elastically slidably connected by a spring.

[0010] In a preferred embodiment, the symmetrical branch also includes a clamping nut and a clamping sleeve, wherein a clamping sleeve is fixed on one of the rings, the clamping sleeve is arranged on the outside of the positioning rod, the outer side of the positioning rod is threadedly connected with a clamping nut, and the clamping sleeve is located on the moving path of the inner wall of the clamping nut.

[0011] In a preferred embodiment, the supporting portion is a side branch, which includes a disk body and a resistance rod. The disk body is connected to the positioning rod in a damping sliding manner. A plurality of limit grooves are provided on the disk body. A resistance rod is elastically and slidably connected in each limit groove. The resistance rod and the corresponding support rod are in resistance.

[0012] In a preferred embodiment, the limiting groove is opened along the tangential direction of the disk body.

[0013] In a preferred embodiment, the tops of the positioning rod and the supporting rod are elastically connected to supporting heads.

[0014] Technical effects and advantages of the utility model:

[0015] By changing the opening size of the support rod, the clamping and positioning process of free-form surface lenses of different sizes and curvatures can be adapted to reduce the interference of the grinding force on the stability of the free-form surface lenses during the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the technical solution of the present utility model and constitute a part of the present utility model. The embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation on the present utility model.

[0017] Figure 1 It is a schematic diagram of a precise positioning structure for grinding a free-form surface lens according to the utility model.

[0018] Figure 2 It is a top view of the support part of the utility model.

[0019] Figure 3 for Figure 1 A partial enlarged view of middle A.

[0020] Figure 4 This is a structural diagram of the elastic unit of the utility model.

[0021] Figure 5 It is a schematic diagram of the assembly of the clamping sleeve of the utility model.

[0022] Figure 6 It is the structural diagram of the threaded sleeve of the utility model.

[0023] Figure 7 It is a structural diagram of the side branch of the utility model.

[0024] Figure 8 It is a cross-sectional view of the side branch of the utility model.

[0025] The accompanying drawings are marked as follows: 1. base; 2. sleeve; 3. support part; 31. positioning rod; 32. support rod; 4. adjustment part; 41. bearing platform; 42. flip block; 43. clamping hole; 5. symmetrical branch; 51. ring; 52. elastic plate; 53. clamping nut; 54. clamping sleeve; 6. side branch; 61. disk; 62. resistance rod. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0027] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0028] Example 1

[0029] The utility model provides Figure 1-Figure 8The free-form surface lens grinding and precise positioning structure shown in the figure mainly comprises a base 1, a sleeve 2, a support part 3, an adjustment part 4 and a support part, wherein the base 1 is used to fix the entire structure on the grinding equipment, the sleeve 2 and the base 1 are fixedly connected, one end of the support part 3 is aggregated and inserted into the sleeve 2 and the other end is opened and located outside the sleeve 2, which is used to support the concave surface of the free-form surface lens. The adjustment part 4 is used to adjust the opening size of the support part 3, and the support part is used to cooperate with the adjustment part 4 to stabilize the support part 3 from both the inside and outside of the support part 3 to improve the stability of the support positioning.

[0030] Specifically, the support portion 3 comprises a positioning rod 31, a support rod 32 and a support head. A positioning rod 31 fixed to the base 1 is passed through the sleeve 2, and a plurality of support rods 32 are arranged on the peripheral side of the positioning rod 31. The support rod 32 can be opened or closed relative to the positioning rod 31 through the action of the adjustment portion 4. A support head is elastically connected to the top of the positioning rod 31 and the support rod 32, that is, the position for supporting the free-form surface lens. The material of the support head is preferably rubber, which can effectively reduce the damage to the lens caused during the support process.

[0031] Preferably, the positioning rod 31 is located on the axis of the sleeve 2 , and a plurality of support rods 32 are evenly arranged around the positioning rod 31 .

[0032] In the first case of the present embodiment, the adjusting part 4 comprises a bearing platform 41, a turning block 42 and a clamping hole 43. The bearing platform 41 is elastically slidably connected to the outside of the positioning rod 31. A plurality of support rods 32 are fixed on the end surface of the bearing platform 41. A plurality of clamping holes 43 are provided on the sleeve 2. A turning block 42 is hinged on the bearing platform 41. The turning block 42 is located on the outside of the sleeve 2. A convex nail engaging with the clamping hole 43 is fixed on the turning block 42. By turning over the turning block 42 and letting the convex nail disengage from the clamping hole 43, the position of the bearing platform 41 relative to the positioning rod 31 can be freely adjusted, thereby adjusting the opening and closing range of the support rod 32. When the opening and closing range meets the size of the supported free-form surface lens, the turning block 42 is turned over and the convex nail on the turning block 42 is inserted into the corresponding clamping hole 43.

[0033] Through the above design, under the action of the adjustment part 4, once the open support rod 32 moves downward, the support rod 32 will be resisted by the top of the sleeve 2 and converge inwards to enter the sleeve 2. At this time, the opening and closing range between the support rods 32 used to support the free-form surface lens will become smaller. Similarly, once the support rod 32 moves upward, the opening and closing range of several support rods 32 will become larger. By moving the support rod 32 up and down, the purpose of freely adjusting the support range of the support rod 32 can be achieved. The positioning rod 31 is always located at the center position so as to correspond to the highest point of the concave surface of the free-form surface lens and achieve the purpose of rapid positioning.

[0034] In the second case of this embodiment, the adjusting part 4 includes a bearing platform 41, a bolt and a locking nut. The bearing platform 41 is fixedly connected with a bolt. The sleeve 2 is provided with a sliding groove for the bolt to slide. The outer side of the sleeve 2 is provided with a locking nut tightly connected with the bolt. The bolt can be moved up and down to drive the bearing platform 41 to move. When the position is appropriate, the locking nut is tightened to utilize the interference between the locking nut, the side wall of the sleeve 2 and the adjusting part 4 to achieve the purpose of fixing the position of the adjusting part 4.

[0035] In the third case of this embodiment, the adjusting part 4 is a threaded sleeve, the outer side of the sleeve 2 is provided with an external thread, the sleeve 2 and the threaded sleeve are threadedly connected, and the outer edge of the support rod 32 and the top of the threaded sleeve are in conflict. The third case is different from the above two cases in that the adjusting part 4 directly acts on the rod body of the support rod 32, and adjusts the opening and closing range of the support rod 32 by squeezing. In this case, the support rod 32 and the positioning rod 31 can be directly fixed on the base 1.

[0036] Example 2

[0037] See also Figure 1-Figure 8 Based on the above embodiment, the specific structure of the support part is designed as follows:

[0038] The first design: the supporting part is a symmetrical branch 5, and the symmetrical branch 5 is symmetrically arranged with elastic units, each elastic unit has a ring 51 and a plurality of elastic plates 52, the number of the elastic plates 52 is equal to the number of the support rods 32, the circumferential side of the ring 51 is elastically connected with the elastic plate 52, and the two symmetrical rings 51 are elastically slidably connected by a spring, and the symmetrical branch 5 also has a clamping nut 53 and a clamping sleeve 54, one of the rings 51 is fixed with a clamping sleeve 54, and the clamping sleeve 54 is sleeved on the outside of the flip block 42, and the outer side of the positioning rod 31 is threadedly connected with the clamping nut 53, and the clamping sleeve 54 is located on the moving path of the inner wall of the clamping nut 53. When the position of the clamping sleeve 54 is determined, the clamping nut 53 is tightened to fix the position of the ring 51.

[0039] In this way, the elastic supporting force of the spring and the elastic plate 52 can be used to increase the supporting force of the support rod 32 to expand outward, thereby improving the stability of the support rod 32 in supporting the free-form surface wafer after being opened.

[0040] The second design: the supporting part is a side branch 6, the side branch 6 has a disk 61 and a resistance rod 62, the disk 61 is slidably connected to the positioning rod 31, a plurality of limiting grooves are provided on the disk 61, each limiting groove is elastically slidably connected with a resistance rod 62, the resistance rod 62 and the corresponding support rod 32 are in resistance, wherein the limiting groove is provided along the tangential direction of the disk 61 to increase the movable distance of the resistance rod 62.

[0041] In this way, the elastic supporting force of the spring and the resisting rod 62 can be used to increase the supporting force of the support rod 32 to expand outward, thereby improving the stability of the support rod 32 in supporting the free-form surface wafer after being opened.

[0042] Comparing the above two design methods, the structure of the symmetrical branch 5 is more stable, and the structure of the lateral branch 6 is simpler. Each has its own advantages and disadvantages. Users can freely choose according to specific circumstances in actual application. This embodiment will not be described in detail here.

[0043] In summary, the main improvement of the present application is that by changing the opening size of the support rod 32, it is adapted to the clamping and positioning process of free-form surface lenses of different sizes and curvatures, so as to reduce the interference of the grinding force on the stability of the free-form surface wafer during the grinding process.

[0044] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A free-form surface lens grinding and precise positioning structure, characterized in that include: A base (1) is mounted on a frame of the grinding machine; A sleeve (2) is fixed on the base (1); The support part (3) comprises a positioning rod (31) and a supporting rod (32), wherein one end of the positioning rod (31) is fixedly connected to the base (1) and the other end thereof protrudes out of the sleeve (2), and the same-direction ends of a plurality of supporting rods (32) are arranged around the positioning rod (31) and the other ends thereof protrude out of the outer side of the sleeve (2); The adjusting part (4) is disposed inside the sleeve (2) and is used to drive the supporting rod (32) to open and close with the positioning rod (31) as the center; The support portion is disposed on the inner side of the plurality of support rods (32) and is used to clamp the support rods (32) from both the inner and outer sides together with the sleeve (2).

2. The free-form surface lens grinding and precise positioning structure according to claim 1, characterized in that: The adjusting part (4) comprises a bearing platform (41) and a stop assembly, the bearing platform (41) is elastically slidably connected to the outer side of the positioning rod (31), a plurality of support rods (32) are fixed on the end surface of the bearing platform (41), and the bearing platform (41) is connected to a stop assembly for limiting the movement of the bearing platform (41).

3. The free-form surface lens grinding and precise positioning structure according to claim 2, characterized in that: The stop assembly comprises a flap (42) and a clamping hole (43); a plurality of clamping holes (43) are provided on the sleeve (2); a flap (42) is hingedly connected to the support platform (41); the flap (42) is located outside the sleeve (2); a slot for the flap (42) to slide is provided on the sleeve (2); and a convex nail engaged with the clamping hole (43) is fixed on the flap (42).

4. The free-form surface lens grinding and precise positioning structure according to claim 2, characterized in that: The stop assembly comprises a bolt and a locking nut, the bolt is fixedly connected to the bearing platform (41), the bearing platform (41) slides against the inner wall of the sleeve (2), a sliding groove for the bolt to slide is provided on the sleeve (2), and a locking nut is provided on the outer side of the sleeve (2) and is tightly connected to the bolt.

5. The free-form surface lens grinding and precise positioning structure according to claim 1, characterized in that: The adjusting portion (4) is a threaded sleeve, an outer side of the sleeve (2) is provided with an external thread, the sleeve (2) and the threaded sleeve are threadedly connected, the outer edge of the support rod (32) abuts against the top of the threaded sleeve, and the support rod (32) and the positioning rod (31) are fixed together on the base (1).

6. A free-form surface lens grinding and precise positioning structure according to any one of claims 1 to 5, characterized in that: The support portion is a symmetrical branch (5), and the symmetrical branch (5) includes symmetrically arranged elastic units, each elastic unit includes a ring (51) and a plurality of elastic plates (52), the number of the elastic plates (52) is equal to the number of the support rods (32), the elastic plate (52) is elastically connected to the circumferential side of the ring (51), and the two symmetrical rings (51) are elastically slidably connected via a spring.

7. The free-form surface lens grinding and precise positioning structure according to claim 6, characterized in that: The symmetrical branch (5) also includes a clamping nut (53) and a clamping sleeve (54), wherein a clamping sleeve (54) is fixed on one of the rings (51), and the clamping sleeve (54) is sleeved on the outer side of the positioning rod (31), and the outer side of the positioning rod (31) is threadedly connected with the clamping nut (53), and the clamping sleeve (54) is located on the moving path of the inner wall of the clamping nut (53).

8. A free-form surface lens grinding and precise positioning structure according to any one of claims 1 to 5, characterized in that: The supporting portion is a lateral branch portion (6), and the lateral branch portion (6) comprises a disc body (61) and a resisting rod (62). The disc body (61) is connected to the positioning rod (31) in a damping sliding manner. The disc body (61) is provided with a plurality of limiting grooves, and a resisting rod (62) is elastically slidably connected in each limiting groove. The resisting rod (62) resists against the corresponding supporting rod (32).

9. The free-form surface lens grinding and precise positioning structure according to claim 8, characterized in that: The limiting groove is opened along the tangent direction of the disc body (61).

10. The free-form surface lens grinding and precise positioning structure according to claim 1, characterized in that: The tops of the positioning rod (31) and the supporting rod (32) are elastically connected to supporting heads.

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