Air float device of lens fine grinding and polishing machine

Abstract

The application relates to a gas floating device of a lens fine grinding and polishing machine, and belongs to the technical field of lens processing equipment, which comprises a rack, a fixed disc and a rotary arc, the fixed disc is connected with the rack, the fixed disc is coaxially provided with a rotary circular groove, the rotary arc is rotatably arranged in the rotary circular groove, the rotary arc is hollow, and a polishing dish is arranged in the rotary arc; the device further comprises an external gas source, the fixed disc is provided with a plurality of gas floating groove holes at equal angles around the central axis of the rotary circular groove, the two ends of the gas floating groove hole are respectively connected with the external gas source and the rotary circular groove, and the external gas source is connected with the gas floating groove hole; before the rotary arc rotates relative to the fixed disc, the external gas source first starts to work, blows air into the gas floating groove hole, so that an air film is formed between the rotary arc and the fixed disc, the air film can reduce the friction between the rotary arc and the fixed disc, thereby protecting the contact surface between the rotary arc and the fixed disc, protecting the structure of the key moving pair of the device, and prolonging the service life of the key moving pair of the device.

Description

Technical Field

[0001] This invention belongs to the field of lens processing technology, and specifically relates to an air flotation device for a lens fine grinding and polishing machine. Background Technology

[0002] In the optical lens manufacturing process, the fine grinding process undertakes the dual tasks of correcting the lens shape and controlling the surface roughness. Its process level directly determines the lens's refractive accuracy and scattering suppression performance. The overall performance of this process is dominated by the comprehensive performance of the fine grinding and polishing machine, and is simultaneously reflected in the final processing error and production efficiency.

[0003] Currently, the mainstream solution for precision grinding and polishing machines is to make the lens and the grinding wheel perform a "circumferential contact" motion: the grinding disc and the lens are always in surface contact and rotate relative to each other in a circle to ensure surface accuracy. However, in order to ensure continuous and reliable motion trajectory, key moving pairs need to use surface-to-surface contact to limit the equipment to perform reliable circular motion. This surface-to-surface sliding friction causes the key moving pairs to be in a heavy-load dry grinding state for a long time, which amplifies frictional heat and wear dramatically, directly leading to a shortened life of the key moving pairs, and consequently worsening the overall reliability and maintenance costs of the equipment. Summary of the Invention

[0004] To address the problem that critical moving parts in existing equipment undergo prolonged heavy-load dry grinding, leading to a sharp increase in frictional heat and wear, which shortens the lifespan of critical moving parts and consequently worsens the overall reliability and maintenance costs of the equipment, this invention provides an air flotation device for a lens fine grinding and polishing machine.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An air flotation device for a lens polishing machine includes a frame, a fixed plate, and a rotating arc. The fixed plate is connected to the frame and has a rotating groove coaxially formed on it. The rotating arc is rotatably disposed within the rotating groove and is hollow inside. A polishing dish is disposed within the rotating arc.

[0007] It also includes an external air source. The fixed disk has a plurality of air flotation slots at equal angles around the central axis of the rotating circular groove. The two ends of the air flotation slots are respectively connected to the external air source and the rotating circular groove.

[0008] The lens to be polished is installed inside the rotating arc, with the lens located on top of the polishing dish. The lens can be locked or released from its abutment against the polishing dish.

[0009] As a preferred embodiment of the present invention, the rotating arc can perform circular motion in any direction relative to the fixed disk.

[0010] As a preferred embodiment of the present invention, it further includes a hollow waterproof cover, the top of which is connected to the frame, and the bottom of which, together with the rotating arc, forms a drainage space, in which the lens and the polishing dish are located.

[0011] As a preferred embodiment of the present invention, the waterproof cover is provided with a water inlet, the rotating arc is provided with a water outlet, and both the water inlet and the water outlet are connected to the sewage discharge space.

[0012] As a preferred embodiment of the present invention, the fixed disk is provided with an air flotation ring around the central axis of the rotating circular groove. The air flotation ring is connected to the rotating circular groove. The fixed disk and the rotating circular groove cooperate to seal the air flotation ring to form an air flotation space. The air flotation space is connected to the air flotation groove hole.

[0013] As a preferred embodiment of the present invention, the waterproof cover includes a hollow waterproof hemisphere and a waterproof cylinder. The top and bottom of the waterproof cylinder are connected to the frame and the waterproof hemisphere, respectively. The waterproof hemisphere is tangent to the inner side of the rotating arc, and the rotating arc can move in any direction relative to the waterproof hemisphere.

[0014] As a preferred embodiment of the present invention, the outer diameter of the waterproof straight cylinder is smaller than the maximum outer diameter of the waterproof hemisphere.

[0015] As a preferred embodiment of the present invention, it further includes an annular blocking sheet, which is coaxially disposed at the bottom of the waterproof hemisphere and is inclined downward toward the direction of the rotating arc.

[0016] As a preferred embodiment of the present invention, the rotating arc is further provided with an expansion slot, and the expansion slot and the bottom of the waterproof hemisphere form an expansion space with a gradually increasing gap from top to bottom. The annular blocking plate is located at the bottom of the expansion space, and the maximum gap between the annular blocking plate and the rotating arc is not greater than the minimum width of the expansion space.

[0017] As a preferred embodiment of the present invention, the gap path direction between the annular blocking plate and the rotating arc and the gap path direction between the top of the waterproof hemisphere and the rotating arc do not coincide.

[0018] The beneficial effects of this invention are as follows:

[0019] This design features a fixed disk with several air flotation slots at equal angles around the central axis of the rotating groove. The two ends of each air flotation slot are connected to an external air source and the rotating groove, respectively. Before the rotating arc rotates relative to the fixed disk, the external air source blows air into the air flotation slots, creating an air film between the rotating arc and the fixed disk. This air film reduces friction between the rotating arc and the fixed disk, protecting the contact surface and the structure of the critical moving parts of the device. It also extends the service life of these critical moving parts, solving the problem that existing equipment's critical moving parts, subjected to long-term heavy-load dry-grinding, experience a sharp increase in frictional heat and wear, leading to a shortened lifespan and consequently deteriorated overall equipment reliability and maintenance costs. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is an overall view of the air flotation device of a lens fine grinding and polishing machine according to the present invention;

[0022] Figure 2 This is a front view of the air flotation device of a lens polishing machine according to the present invention;

[0023] Figure 3 This is an overall view of the fixing plate of a lens polishing machine according to the present invention;

[0024] Figure 4 This is a front view of a waterproof cover for a lens polishing machine according to the present invention;

[0025] Figure 5 This is a cross-sectional view of a waterproof cover for a lens polishing machine according to the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged view of point A.

[0027] Explanation of main symbols

[0028] In the diagram: 1. Frame; 2. Fixed plate; 201. Rotating groove; 202. Air flotation groove hole; 203. Air flotation ring; 3. Rotating arc; 4. Waterproof cover; 401. Water inlet; 402. Water outlet; 403. Waterproof hemisphere; 404. Waterproof cylinder; 5. Annular baffle; 6. Expansion space. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0030] Please see Figures 1-6 This embodiment provides an air flotation device for a lens polishing machine, including a frame 1, a fixed plate 2, and a rotating arc 3. The fixed plate 2 is connected to the frame 1. The fixed plate 2 has a rotating groove 201 coaxially formed. The rotating arc 3 is rotatably disposed within the rotating groove 201. The interior of the rotating arc 3 is hollow, and a polishing dish is disposed within the rotating arc 3. It also includes an external air source. The fixed plate 2 has a plurality of air flotation slots 202 formed at equal angles around the central axis of the rotating groove 201. The two ends of the air flotation slots 202 are respectively connected to an external air source. The air source and the rotating groove 201 are interconnected; the lens to be polished is installed inside the rotating arc 3, with the lens located on top of the polishing dish. The lens can be locked or released from its contact with the polishing dish. It is worth noting that the way the rotating arc 3 and the fixed plate 2 are coupled allows the rotating arc 3 to perform circumferential movement relative to the fixed plate 2 in any direction. Furthermore, it should be noted that the rotating arc 3 and the fixed plate 2 are coupled through surface-to-surface contact, which allows the rotating arc 3 to move in any direction relative to the fixed plate. 2. During rotation, the contact surface between the rotating arc 3 and the fixed disk 2 is in a dry-grinding state. Therefore, in order to reduce the friction between the rotating arc 3 and the fixed disk 2, the fixed disk 2 in this scheme has several air flotation slots 202 at equal angles around the central axis of the rotating groove 201. The two ends of the air flotation slots 202 are connected to the external air source and the rotating groove 201, respectively. Before the rotating arc 3 rotates relative to the fixed disk 2, the external air source starts working first and blows air into the air flotation slots 202, so that an air film is formed between the rotating arc 3 and the fixed disk 2. This air film can reduce the friction between the rotating arc 3 and the fixed disk 2, thereby protecting the contact surface between the rotating arc 3 and the fixed disk 2, protecting the structure of the key moving parts of the device, extending the service life of the key moving parts of the device, and solving the problem that the key moving parts of the existing equipment are in a heavy-load dry-grinding state for a long time, resulting in a sharp increase in frictional heat and wear, which leads to a shortened service life of the key moving parts and a deterioration of the overall reliability and maintenance cost of the equipment.

[0031] It should also be noted that the polishing dish in this solution is used to polish the lens. The polishing dish is connected to the rotating arc 3, so that the polishing dish not only has the ability to rotate, but also can perform circumferential motion, thereby realizing the polishing process of the lens.

[0032] However, during the polishing process of the grinding dish, abrasive debris is generated. To ensure that the abrasive debris does not fly everywhere, this solution also includes a hollow waterproof cover 4. The top of the waterproof cover 4 is connected to the frame 1, and the bottom of the waterproof cover 4 and the rotating arc 3 together form a sludge discharge space. Both the lens and the grinding dish are located in the sludge discharge space. With this setting, the abrasive debris generated during the polishing process of the lens can only be confined to the sludge discharge space and cannot fly to other parts of the device, ensuring the normal operation of the device.

[0033] Furthermore, in order to handle the abrasive debris located in the sewage discharge space, the waterproof cover 4 of this solution has a water inlet 401 and the rotating arc 3 has a water outlet 402. Both the water inlet 401 and the water outlet 402 are connected to the sewage discharge space. With this arrangement, when water enters the sewage discharge space from the water inlet 401, the abrasive debris located in the sewage discharge space will adhere to the water and be discharged out of the water outlet 402 along with the water.

[0034] Furthermore, in order to increase the area of ​​the air film and reduce the friction between the rotating arc 3 and the fixed disk 2, the fixed disk 2 in this scheme has an air flotation ring 203 around the central axis of the rotating groove 201. The air flotation ring 203 is connected to the rotating groove 201. The fixed disk 2 and the rotating arc 3 cooperate to seal the air flotation ring 203 to form an air flotation space. The air flotation space is connected to the air flotation slot 202. By setting the air flotation ring 203, when the fixed disk 2 and the rotating arc 3 cooperate, an air flotation space will be formed between the fixed disk 2 and the rotating arc 3. The air flotation space is connected to the air flotation slot 202, which can increase the area of ​​the air film and further reduce the friction between the rotating arc 3 and the fixed disk 2.

[0035] Furthermore, to ensure that the waterproof cover 4 does not interfere with the rotation of the rotating arc 3, the waterproof cover 4 in this design includes a hollow waterproof hemisphere 403 and a waterproof cylinder 404. The top and bottom of the waterproof cylinder 404 are connected to the frame 1 and the waterproof hemisphere 403, respectively. The waterproof hemisphere 403 is fitted against the inner side of the rotating arc 3, allowing the rotating arc 3 to move in any direction relative to the waterproof hemisphere 403. This design achieves a sealed sewage discharge space formed by the waterproof cover 4 and the rotating arc 3, while also ensuring that the waterproof hemisphere 403 does not interfere with the rotation of the rotating arc 3.

[0036] In addition, it should be noted that since the rotating arc 3 can rotate relative to the waterproof hemisphere 403, in order to prevent the waterproof straight cylinder 404 from interfering with the rotation of the rotating arc 3 during the rotation process, the outer diameter of the waterproof straight cylinder 404 in this solution is smaller than the maximum outer diameter of the waterproof hemisphere 403. This setting can ensure that the waterproof straight cylinder 404 will not interfere with the rotation of the rotating arc 3.

[0037] Furthermore, it should be noted that since the rotating arc 3 can rotate relative to the waterproof hemisphere 403, a gap remains between the rotating arc 3 and the waterproof hemisphere 403 during actual manufacturing. Since the fine grinding and polishing of the lens is performed within the waterproof hemisphere 403, abrasive debris located within the waterproof hemisphere 403 may adhere to the inner side of the rotating arc 3 through the gap between the rotating arc 3 and the waterproof hemisphere 403. This can lead to an increase in the gap between the rotating arc 3 and the waterproof hemisphere 403 when the rotating arc 3 rotates relative to the waterproof hemisphere 403. The friction between 03; based on this, in order to solve this problem, this solution is to set an annular blocking plate 5, which is coaxially set at the bottom of the waterproof hemisphere 403, and the annular blocking plate 5 is set inclined downwards towards the direction of the rotating arc 3; by setting the annular blocking plate 5, due to the setting direction of the annular blocking plate 5, the end of the annular blocking plate 5 away from the waterproof hemisphere 403 will be close to the rotating arc 3, which is equivalent to reducing the minimum gap between the annular blocking plate 5 and the rotating arc 3, increasing the difficulty for abrasive debris to enter the gap between the rotating arc 3 and the waterproof hemisphere 403.

[0038] However, in practice, the particle size of abrasive debris is always much smaller than the minimum gap between the annular baffle 5 and the rotating arc 3. This means that the annular baffle 5 cannot completely block the abrasive debris within the drainage space. To address this issue, the rotating arc 3 in this design also has an expansion slot. The expansion slot and the bottom of the waterproof hemisphere 403 form an expansion space 6 with a gradually increasing gap from top to bottom. The annular baffle 5 is located at the bottom of the expansion space 6, and the maximum gap between the annular baffle 5 and the rotating arc 3 is not greater than the minimum width of the expansion space 6. First, it needs to be defined that the gap between the rotating arc 3 and the top of the waterproof hemisphere 403 is the first gap; the gap between the rotating arc 3 and the bottom of the waterproof hemisphere 403 is the second gap; and the gap between the end of the annular component piece away from the waterproof hemisphere 403 and the rotating arc 3 is the third gap. The first gap is characterized by having a uniform cross-sectional width everywhere, while the second gap is characterized by having a cross-sectional width that gradually increases from top to bottom. The third gap is characterized by having a cross-sectional width smaller than that of the second gap.

[0039] Taking the right end of the cross-section as an example, when the rotating arc 3 rotates upward relative to the right end of the waterproof hemisphere 403, the air pressure in the sewage discharge space will flow from the third gap to the first gap. At this time, the abrasive debris in the sewage discharge space will move to the second gap through the third gap. However, since the cross-sectional width of the second gap increases from top to bottom and the cross-sectional width of the third gap is smaller than that of the second gap, the air pressure weakens instantly after entering the second gap from the third gap. As a result, the abrasive debris in the second gap does not have enough power to move to the first gap through the second gap. The abrasive debris in the second gap will fall onto the end face of the annular baffle 5. Similarly, when the rotating arc 3 rotates upwards and to the left relative to the waterproof hemisphere 403, the air pressure will flow from the first gap to the third gap. At this time, the abrasive debris on the end face of the annular baffle 5 will fall back into the sewage discharge space due to the air pressure, thus preventing the abrasive debris from entering the first gap.

[0040] Furthermore, it should be noted that the gap path direction between the annular blocking plate 5 and the rotating arc 3 in this scheme does not coincide with the gap path direction between the top of the waterproof hemisphere 403 and the rotating arc 3. With this setting, when the abrasive debris moves through the third gap into the second gap, since the path directions of the first gap and the third gap do not coincide, the abrasive debris entering the second gap will impact the inner side of the rotating arc 3 of the second gap due to inertia, further weakening the momentum of the abrasive debris and preventing the abrasive debris from entering the first gap.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An air flotation device for a lens grinding and polishing machine, characterized in that: The device includes a frame, a fixed plate, and a rotating arc. The fixed plate is connected to the frame and has a rotating groove coaxially formed on it. The rotating arc is rotatably disposed within the rotating groove and is hollow inside. A grinding disc is disposed within the rotating arc. It also includes an external air source. The fixed disk has a plurality of air flotation slots at equal angles around the central axis of the rotating circular groove. The two ends of the air flotation slots are respectively connected to the external air source and the rotating circular groove. The lens to be polished is installed inside the rotating arc, with the lens located on top of the polishing dish. The lens can be locked or released from its abutting relationship with the polishing dish. It also includes an internally hollow waterproof cover, the top of which is connected to the frame, and the bottom of which, together with the rotating arc, forms a drainage space, in which the lens and the polishing dish are located. The waterproof cover includes a hollow waterproof hemisphere and a waterproof cylinder. The top and bottom of the waterproof cylinder are connected to the frame and the waterproof hemisphere, respectively. The waterproof hemisphere is tangent to the inner side of the rotating arc, and the rotating arc can move in any direction relative to the waterproof hemisphere. It also includes an annular blocking plate, which is coaxially disposed at the bottom of the waterproof hemisphere and is inclined downward toward the direction of the rotating arc; The rotating arc is also provided with an expansion slot. The expansion slot and the bottom of the waterproof hemisphere form an expansion space with a gradually increasing gap from top to bottom. The annular blocking plate is located at the bottom of the expansion space, and the maximum gap between the annular blocking plate and the rotating arc is not greater than the minimum width of the expansion space.

2. The air flotation device for a lens fine grinding and polishing machine according to claim 1, characterized in that: The rotating arc can move in any direction relative to the fixed disk.

3. The air flotation device for a lens grinding and polishing machine according to claim 1, characterized in that: The waterproof cover has a water inlet, and the rotating arc has a water outlet. Both the water inlet and the water outlet are connected to the sewage discharge space.

4. The air flotation device for a lens fine grinding and polishing machine according to claim 1, characterized in that: The fixed disk has an air flotation ring around the central axis of the rotating groove. The air flotation ring is connected to the rotating groove. The fixed disk and the rotating groove cooperate to seal the air flotation ring to form an air flotation space. The air flotation space is connected to the air flotation groove hole.

5. The air flotation device for a lens grinding and polishing machine according to claim 1, characterized in that: The outer diameter of the waterproof straight cylinder is smaller than the maximum outer diameter of the waterproof hemisphere.

6. The air flotation device for a lens grinding and polishing machine according to claim 1, characterized in that: The gap path direction between the annular blocking plate and the rotating arc and the gap path direction between the top of the waterproof hemisphere and the rotating arc do not coincide.

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