Air floatation device of lens accurate grinding polisher

Abstract

The invention relates to an air flotation device of a lens accurate grinding polisher, and belongs to the technical field of lens machining equipment, the air flotation device comprises a rack, a fixed disc and a rotating arc, the fixed disc is connected with the rack, a rotating circular groove is coaxially formed in the fixed disc, the rotating arc is rotatably arranged in the rotating circular groove, the interior of the rotating arc is hollow, and a grinding vessel is arranged in the rotating arc; the device further comprises an external air source, a plurality of air floatation groove holes are formed in the fixing disc around the central axis of the rotary circular groove at equal angles, and the two ends of the air floatation groove holes communicate with the external air source and the rotary circular groove correspondingly. Before the rotating arc rotates relative to the fixed disc, an external air source firstly starts to work and blows air into the air floatation groove holes, so that an air film is formed between the rotating arc and the fixed disc, the air film can reduce friction force between the rotating arc and the fixed disc, and then the contact surface between the rotating arc and the fixed disc is protected; the key kinematic pair structure of the device is protected, and the service life of the key kinematic pair of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lens processing, and particularly relates to an air floating device of a lens fine grinding and polishing machine. BACKGROUND

[0002] In the optical lens manufacturing process, the fine grinding process undertakes the dual tasks of surface shape correction and surface roughness control of the lens, and the process level directly determines the refractive accuracy and scattering inhibition performance of the lens. The overall performance of this link is dominated by the comprehensive performance of the fine grinding and polishing machine, and is simultaneously mapped to the final processing error and production efficiency.

[0003] At present, the mainstream scheme of the fine grinding and polishing machine is to make the lens and the grinding tool do "circumferential fitting" motion: the grinding disc and the lens are always in surface contact and rotate relative to the circumference to ensure the surface shape accuracy. However, in order to ensure the continuous and reliable motion trajectory, the key motion pair needs to adopt surface-to-surface fitting to limit the reliable circumferential motion of the equipment. This surface-to-surface sliding friction makes the key motion pair in a long-term heavy dry grinding state, and the friction heat and wear are greatly amplified, which directly leads to the shortening of the service life of the key motion pair, and the deterioration of the comprehensive reliability and maintenance cost of the equipment. SUMMARY

[0004] In order to solve the problem that the key motion pair of the existing equipment for circumferential motion trajectory is in a long-term heavy dry grinding state, the friction heat and wear are greatly amplified, and thus the service life of the key motion pair is shortened, and the comprehensive reliability and maintenance cost of the equipment are deteriorated, the application provides an air floating device of a lens fine grinding and polishing machine.

[0005] The purpose of the application can be achieved by the following technical solutions: An air floating device of a lens fine grinding and polishing machine, comprising a rack, a fixed disc and a rotating circular arc, the fixed disc is connected with the rack, the fixed disc is coaxially provided with a rotating circular groove, the rotating circular arc is rotatably arranged in the rotating circular groove, the rotating circular arc is hollow, and a polishing dish is arranged in the rotating circular arc. Further comprising an external gas source, the fixed disc is provided with a plurality of air floating groove holes at equal angles around the center axis of the rotating circular groove, and the two ends of the air floating groove hole are respectively in communication with the external gas source and the rotating circular groove. The lens to be polished is installed in the rotating circular arc, and the lens is located on the top of the polishing dish, and the lens can be locked or unlocked with the polishing dish.

[0006] As a preferred technical solution of the application, the rotating circular arc can perform circumferential motion in any direction relative to the fixed disc.

[0007] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0008] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0009] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0010] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0011] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0012] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0013] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0014] As a preferred technical scheme of the present application, the waterproof cover is internally hollow, the top of the waterproof cover is connected with the rack, the bottom of the waterproof cover and the rotating circular arc jointly form a blowdown space, and the lens and the polishing dish are both located in the blowdown space.

[0015] The present application has the following beneficial effects: The fixed disc is provided with a plurality of air floatation groove holes at equal angles around the central axis of the rotating circular groove, and the two ends of the air floatation groove hole are respectively communicated with the external air source and the rotating circular groove; before the rotating circular arc rotates relative to the fixed disc, the external air source first starts to work to blow air into the air floatation groove hole, so that an air film is formed between the rotating circular arc and the fixed disc, the air film can reduce the friction between the rotating circular arc and the fixed disc, thereby protecting the contact surface between the rotating circular arc and the fixed disc, protecting the structure of the key moving pair of the device, prolonging the service life of the key moving pair of the device, and solving the problem that the key moving pair of the existing equipment performing the circular motion track is in a long-term heavy load dry grinding state, the friction heat and wear are sharply amplified, and therefore the service life of the key moving pair is shortened, and the comprehensive reliability and maintenance cost of the equipment are deteriorated. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with the drawings.

[0017] Figure 1 It is a whole view of the air floatation device of the lens fine grinding and polishing machine of the present application. Figure 2 It is a front view of the air floatation device of the lens fine grinding and polishing machine of the present application. Figure 3 It is a whole view of the fixed disc of the lens fine grinding and polishing machine of the present application. Figure 4 It is a front view of the waterproof cover of the lens fine grinding and polishing machine of the present application. Figure 5 It is a sectional view of the waterproof cover of the lens fine grinding and polishing machine of the present application. Figure 6 It is an enlarged view of A of the present application. Figure 5

[0018] MAIN SYMBOL EXPLANATION In the drawing: 1, rack; 2, fixed disc; 201, rotating circular groove; 202, air floatation groove hole; 203, air floatation ring; 3, rotating circular arc; 4, waterproof cover; 401, water inlet; 402, water outlet; 403, waterproof hemisphere; 404, waterproof straight cylinder; 5, annular blocking piece; 6, expansion space. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined application purpose, the specific implementation, structure, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0020] Please refer to Figures 1-6 ​The embodiment provides a gas float device of a lens fine grinding and polishing machine, which comprises a rack 1, a fixed disc 2 and a rotating circular arc 3, the fixed disc 2 is connected with the rack 1, the fixed disc 2 is coaxially provided with a rotating circular groove 201, the rotating circular arc 3 is rotatably arranged in the rotating circular groove 201, the rotating circular arc 3 is hollow, and a polishing dish is arranged in the rotating circular arc 3; further comprising an external gas source, the fixed disc 2 is provided with a plurality of gas float groove holes 202 at equal angles around the central axis of the rotating circular groove 201, and the two ends of the gas float groove hole 202 are in communication with the external gas source and the rotating circular groove 201 respectively; the lens to be polished is installed in the rotating circular arc 3, the lens is located on the top of the polishing dish, and the lens can be locked or unlocked from the abutting relationship with the polishing dish; it is worth noting that the cooperation mode of the rotating circular arc 3 and the fixed disc 2 of the scheme enables the rotating circular arc 3 to perform circumferential movement in any direction relative to the fixed disc 2; at the same time, it is worth noting that the cooperation relationship between the rotating circular arc 3 and the fixed disc 2 is through surface-to-surface contact, which makes the contact surface between the rotating circular arc 3 and the fixed disc 2 in a dry grinding state during the rotation of the rotating circular arc 3 relative to the fixed disc 2; therefore, in order to reduce the friction between the rotating circular arc 3 and the fixed disc 2, the fixed disc 2 of the scheme is provided with a plurality of gas float groove holes 202 at equal angles around the central axis of the rotating circular groove 201, and the two ends of the gas float groove hole 202 are in communication with the external gas source and the rotating circular groove 201 respectively; when the rotating circular arc 3 rotates relative to the fixed disc 2, the external gas source first starts to work, blows air into the gas float groove hole 202, so that a gas film is formed between the rotating circular arc 3 and the fixed disc 2, the gas film can reduce the friction between the rotating circular arc 3 and the fixed disc 2, and then protect the contact surface between the rotating circular arc 3 and the fixed disc 2, the structure of the key moving pair of the device, prolong the service life of the key moving pair of the device, solve the problem that the key moving pair of the existing equipment performs circumferential movement track, and the friction heat and wear are sharply enlarged due to the long-term dry grinding state of the key moving pair, so that the service life of the key moving pair is shortened, and the comprehensive reliability and maintenance cost of the equipment are deteriorated.

[0021] At the same time, it is worth noting that the polishing dish of the scheme is used for polishing and polishing the lens, the polishing dish is connected with the rotating circular arc 3, so that the polishing dish not only has the ability of rotation, but also can perform circumferential movement, so as to realize the polishing treatment of the lens.

[0022] However, during the polishing and polishing process of the polishing dish on the lens, abrasive debris will be generated, in order to ensure that the abrasive debris cannot fly everywhere, the scheme further comprises an internal hollow waterproof cover 4, the top of the waterproof cover 4 is connected with the rack 1, the bottom of the waterproof cover 4 and the rotating circular arc 3 jointly form a sewage discharge space, and the lens and the polishing dish are located in the sewage discharge space; through such setting, the abrasive debris generated during the polishing and polishing process of the lens can only be limited in the sewage discharge space, and cannot fly to the remaining positions of the device, so as to ensure the normal operation of the device.

[0023] Further, in order to deal with the abrasive debris located in the drainage space, the waterproof cover 4 is provided with a water inlet 401, and the rotating arc 3 is provided with a water outlet 402, both of which are in communication with the drainage space; through such a setting, when water enters the drainage space from the water inlet 401, the abrasive debris located in the drainage space will adhere to the water and be discharged to the outside of the water outlet 402.

[0024] Further, in order to increase the area of the air film and reduce the friction between the rotating arc 3 and the fixed disc 2, the fixed disc 2 is provided with an air float ring 203 around the center axis of the rotating circular groove 201, the air float ring 203 is in communication with the rotating circular groove 201, and the fixed disc 2 and the rotating arc 3 cooperate to seal the air float ring 203 to form an air float space, which is in communication with the air float groove hole 202; through the setting of the air float ring 203, when the fixed disc 2 and the rotating arc 3 cooperate, an air float space is formed between the fixed disc 2 and the rotating arc 3, which is in communication with the air float groove hole 202, so as to increase the area of the air film and further reduce the friction between the rotating arc 3 and the fixed disc 2.

[0025] Further, in order to ensure that the setting of the waterproof cover 4 does not interfere with the rotation of the rotating arc 3, the waterproof cover 4 includes a waterproof hemisphere 403 and a waterproof straight cylinder 404, the top and bottom of the waterproof straight cylinder 404 are connected with the rack 1 and the waterproof hemisphere 403 respectively, the waterproof hemisphere 403 is arranged in close contact with the inner side of the rotating arc 3, and the rotating arc 3 can perform circular motion in any direction relative to the waterproof hemisphere 403; through such a setting, the waterproof cover 4 and the rotating arc 3 can form a sealed drainage space together; at the same time, the setting of the waterproof hemisphere 403 also does not interfere with the rotation of the rotating arc 3.

[0026] In addition, it also needs to be explained that since the rotating arc 3 can rotate relative to the waterproof hemisphere 403, in order to prevent the setting of the waterproof straight cylinder 404 from interfering with the rotation of the rotating arc 3 during the rotation, the outer diameter of the waterproof straight cylinder 404 is smaller than the maximum outer diameter of the waterproof hemisphere 403, which can ensure that the waterproof straight cylinder 404 does not interfere with the rotation of the rotating arc 3.

[0027] Moreover, it also needs to be explained that, since the rotating arc 3 can rotate relative to the waterproof hemisphere 403, in the actual manufacturing process, there is still a gap between the rotating arc 3 and the waterproof hemisphere 403; and the fine grinding and polishing treatment of the lens is carried out in the waterproof hemisphere 403, so there is a case that the abrasive debris in the waterproof hemisphere 403 will adhere to the inner side of the rotating arc 3 through the gap between the rotating arc 3 and the waterproof hemisphere 403, thereby increasing the friction between the rotating arc 3 and the waterproof hemisphere 403 when the rotating arc 3 rotates relative to the waterproof hemisphere 403; based on this, in order to solve this problem, the present scheme is provided with an annular blocking piece 5, which is coaxially arranged at the bottom of the waterproof hemisphere 403, and the annular blocking piece 5 is arranged downwardly inclined towards the rotating arc 3; by arranging the annular blocking piece 5, due to the arrangement direction of the annular blocking piece 5, the end of the annular blocking piece 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 piece 5 and the rotating arc 3, and increasing the difficulty of abrasive debris entering the gap between the rotating arc 3 and the waterproof hemisphere 403.

[0028] However, in practice, the granularity of abrasive debris is always much smaller than the minimum gap between the annular blocking piece 5 and the rotating arc 3, which results in that the arrangement of the annular blocking piece 5 cannot completely block the abrasive debris in the drainage space; based on this, in order to solve this problem, the present scheme is provided with an expansion slot hole in the rotating arc 3, the expansion slot hole and the bottom of the waterproof hemisphere 403 form an expansion space 6 with increasing gap from top to bottom, the annular blocking piece 5 is located at the bottom of the expansion space 6, and the maximum gap between the annular blocking piece 5 and the rotating arc 3 is not greater than the minimum width of the expansion space 6; first of all, 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 of the expansion space 6 between the rotating arc 3 and the bottom of the waterproof hemisphere 403 is the second gap; the gap between the end of the annular blocking piece 5 away from the waterproof hemisphere 403 and the rotating arc 3 is the third gap; the first gap is characterized by equal cross-sectional width everywhere, while the second gap is characterized by increasing cross-sectional width from top to bottom; the third gap is characterized by a cross-sectional width smaller than the cross-sectional width of the second gap.

[0029] The cooperation relationship between the waterproof hemisphere 403 and the rotating arc 3 is taken as an example at the right end of the cross section. When the rotating arc 3 rotates upward relative to the waterproof hemisphere 403 towards the right end, the air pressure in the blowdown space flows from the third gap to the first gap. At this time, the abrasive debris in the blowdown space moves to the second gap through the third gap. 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 entering the second gap from the third gap is weakened instantaneously, and the abrasive debris entering the second gap has not enough power to move to the first gap through the second gap. The abrasive debris in the second gap falls on the end face of the annular blocking piece 5. Similarly, when the rotating arc 3 rotates upward relative to the waterproof hemisphere 403 towards the left end, the air pressure flows from the first gap to the third gap. At this time, the abrasive debris on the end face of the annular blocking piece 5 falls into the blowdown space again due to the air pressure, avoiding the abrasive debris from entering the first gap.

[0030] In addition, it should be noted that the gap path direction between the annular blocking piece 5 and the rotating arc 3 and the gap path direction between the top of the waterproof hemisphere 403 and the rotating arc 3 do not coincide with each other. Through such a setting, when the abrasive debris moves to the second gap through the third gap, since the path direction of the first gap and the path direction of the third gap do not coincide with each other, the abrasive debris entering the second gap hits the inner side of the rotating arc 3 of the second gap due to inertia, further weakening the power of the abrasive debris, and preventing the abrasive debris from entering the first gap.

[0031] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

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 abutment against the polishing dish.

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: 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.

4. The air flotation device for a lens fine grinding and polishing machine according to claim 3, 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.

5. The air flotation device for a lens 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.

6. The air flotation device for a lens fine grinding and polishing machine according to claim 3, characterized in that: 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.

7. The air flotation device for a lens grinding and polishing machine according to claim 6, characterized in that: The outer diameter of the waterproof straight cylinder is smaller than the maximum outer diameter of the waterproof hemisphere.

8. The air flotation device for a lens grinding and polishing machine according to claim 6, characterized in that: It also includes an annular blocking plate, which is coaxially disposed at the bottom of the waterproof hemisphere and is inclined downwards toward the direction of the rotating arc.

9. The air flotation device for a lens grinding and polishing machine according to claim 8, characterized in that: 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.

10. The air flotation device for a lens grinding and polishing machine according to claim 8, 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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