Optical element polishing device and polishing method

Abstract

The optical element polishing device comprises a polishing box, an L-shaped support and a motor are installed in the polishing box, a polishing table is installed on the side portion of the L-shaped support, a suction cup is rotatably installed in the polishing table, a suction cup rotating shaft is in butt joint with a motor shaft, and the top of the suction cup is used for installing an optical element. And a lifting electric polishing head is movably mounted at the upper end of the L-shaped bracket. The driving assembly is designed, through intelligent control of a temperature sensor and a U-shaped electromagnetic block, the function that the polishing head automatically and gradually moves towards the center of the optical element along with lowering of the liquid level of cooling liquid is achieved, therefore, the all-directional and uniform polishing effect is ensured, the polishing precision and consistency are improved through the design, and compared with electric driving, the polishing efficiency is greatly improved. Manual intervention is reduced, the structure principle is simple, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical element processing, and in particular to an optical element polishing device and a polishing method. Background Art

[0002] Optical components are core and key components in military and civilian fields (such as astronomical telescopes, artificial intelligence (AR / VR), semiconductor chip lithography, new generation communications, medical equipment imaging and new energy, etc.), and there is a huge market demand. Especially in large-scale optical engineering projects in the aerospace and high-tech fields, the demand for ultra-high precision meter-level caliber optical components is particularly urgent. These projects have posed severe technical challenges to the processing and supply capabilities of precision / ultra-precision optical components. Fine polishing is an important link in the manufacturing process of optical components, and its quality directly affects the performance and application effect of optical components.

[0003] The applicant has found that during the fine polishing process, the polishing head is designed to be smaller to improve the accuracy. This requires that the polishing head needs to be adjusted horizontally after a period of time during polishing, that is, the X-axis direction adjustment. The traditional one is still mainly electric drive. For example, the design is used in a CNC polishing machine for optical elements disclosed in CN101386150B. However, this design is complicated to operate. The electric drive system not only requires precise motor control and complex transmission mechanism to ensure the fine-tuning accuracy of the polishing head in the X-axis direction, but also may affect the polishing quality due to the vibration generated by the motor operation. The operation is difficult and requires high requirements for operators. Secondly, the existing fine polishing will also spray coolant during the processing process for cooling and cleaning. However, the investigation found that most of the existing designs are continuous spraying, but continuous spraying not only wastes a lot of coolant resources and increases production costs, but also may cause the humidity of the working environment to be too high. Secondly, continuous spraying of coolant will interfere with the heat management generated during the polishing process. During the polishing process, the heat generated by friction is crucial to the control of material removal rate and surface quality. Continuous spraying will quickly take away this heat, making it difficult to maintain the temperature of the polishing area within a range that is conducive to high-quality polishing. This may lead to inefficient polishing and, in some cases, even uneven material removal due to low temperatures, affecting the final polishing accuracy and surface finish. Finally, the treatment of harmful fumes generated during polishing and the reuse of wastewater are issues that need to be addressed.

[0004] Therefore, it is particularly necessary to design an optical element polishing device and a polishing method to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide an optical element polishing device and a polishing method to solve the problem that the existing cable non-woven fabrics mentioned in the above background technology mostly need to be manually pulled to the cutting position for cutting, and the pulling operation is repeated after cutting a section. This is inefficient and continuous cutting cannot be performed, and there will also be certain safety issues.

[0006] In order to solve the above technical problems, the present invention provides an optical element polishing device, comprising: a polishing box, an L-shaped bracket and a motor are installed inside the polishing box, a polishing table is installed on the side of the L-shaped bracket, a suction cup is rotatably installed inside the polishing table, the suction cup rotating shaft is connected to the shaft of the motor, the top of the suction cup is used to install the optical element, and a lifting electric polishing head is movably installed on the upper end of the L-shaped bracket; The bottom end of the polishing box 1 is provided with a coolant tank and a recovery tank for recycling, and the motor shaft and the coolant tank are connected to an intermittent spray assembly; The upper end of the L-shaped bracket is designed as a cavity, and a driving component is provided together with the optical element and the coolant box, including a temperature sensor arranged vertically and installed on the inner wall of the coolant box, and a U-shaped electromagnetic block arranged horizontally in the cavity at the upper end of the L-shaped bracket. The U-shaped electromagnetic blocks and the temperature sensors are the same in number and are electrically connected. The inner side of the U-shaped electromagnetic block can be adsorbed by the U-shaped metal block, and the U-shaped metal block is embedded in the notch at one end of the slider. The slider slides in the cavity at the upper end of the L-shaped bracket and the bottom is docked with the lifting electric polishing head. An adjusting spring is connected to the inner wall of the cavity at one end of the slider, and a limit assembly is provided on one side of the slider, which can contact the U-shaped electromagnetic block. The cooling liquid box is connected with the intermittent liquid spraying component and the polishing box with a dust collecting component.

[0007] A filter assembly is movably installed inside the recovery box, and the filter assembly is driven by an intermittent liquid spraying assembly to vibrate up and down.

[0008] Preferably, the limit assembly comprises a hollow plate fixed on the front side of the slider, a return spring is installed inside the hollow plate, the return spring is butted with a baffle, the baffle passes through the opening of the hollow plate to form a sliding connection, one end of the baffle is designed in an arc shape, and the arc surface contacts the side of the U-shaped electromagnetic block; The blocking piece can pass through the gap between each U-shaped electromagnetic block.

[0009] Preferably, two rows of balls are installed in the ball groove at the bottom of the slider, and the balls roll on the surface of the cavity at the upper end of the L-shaped bracket.

[0010] Preferably, the intermittent liquid spraying assembly comprises a cylinder fixed on the motor shaft, the outer wall of the cylinder is provided with a continuously surrounding V-shaped groove, a sliding ball is installed in the V-shaped groove, one side of the sliding ball is fixed to the side wall of the lifting block, the lifting block slides on two support rods, the support rods are fixed between the bottom of the polishing table and the polishing box, one side of the lifting block is hinged with a driving rod, one side of the driving rod is rotatably connected to one side of the piston rod, the piston rod passes through one side of the cylinder, and the piston on one side of the piston rod slides sealed inside the cylinder, a one-way valve pipe 1 installed on one side of the cylinder passes through the top of the coolant tank, and a one-way pipe 2 is installed on the top of the cylinder, and the outlet end of the one-way pipe 2 is located on one side of the lifting electric polishing head.

[0011] Preferably, the one-way tube is divided into a fixed tube and a telescopic tube, one end of the fixed tube is fixed at the top of the cylinder, and the other end of the fixed tube is inserted with the telescopic tube to form a sliding connection, the telescopic tube is connected to the slider through a guide rod, the guide rod passes through the L-shaped bracket into its cavity, and a pull ring is fixed at one end of the guide rod.

[0012] Preferably, the dust collection assembly includes a diffusion cover connected to an inlet end of the one-way valve pipe, a turbine is rotatably installed inside the diffusion cover, the rotating shaft of the turbine passes through the coolant tank and is connected to a pulley, the pulley is connected to a second pulley through a belt, and the pulley is rotatably installed on the side wall of the wind box, the wind box is fixed to the side wall of the polishing box, and fan blades are rotatably installed inside, the fan blades and the pulley share a rotating shaft, a filter box is installed inside the polishing box, a dust filter plate is installed inside the filter box, and an air inlet pipe is installed on one side; The polishing box, the filter box and the air box joint surface are provided with a communicating circular opening, and the other side of the air box is also provided with a circular opening for air outlet.

[0013] Preferably, a brush plate is installed at the lower end of the suction cup, the brush of the brush plate is in contact with the surface of the polishing table, and a fan-shaped triangular opening is provided on the polishing table, a receiving box is installed below the triangular opening, and a square tube installed at the bottom end of the receiving box is connected to the recovery box and is located above the filter assembly.

[0014] Preferably, the filter assembly includes a filter frame located inside the coolant tank, an inclined screen is installed inside the filter frame, the outlet end of the square tube is located at the upper end of the inclined surface of the screen, horizontal plates 1 are fixed on both sides of the filter frame, horizontal plate 1 is passed through by a row of vertical rods, the vertical rods are fixed on one side of horizontal plate 2, horizontal plate 2 is fixed on both sides of the inner wall of the coolant tank, a row of vibration springs are connected between horizontal plate 2 and horizontal plate 1, and the vibration springs are sleeved on the outside of the vertical rods.

[0015] Preferably, a pulling rod is fixed on the top of the filter frame, the pulling rod passes through the coolant box and the polishing box, and a magnetic sheet is fixed on the top, the magnetic sheet is located below the lifting block, and can be adsorbed with the lifting block.

[0016] The present invention also provides a polishing method of an optical element polishing device, comprising: S1: Preparation stage: First, fill the coolant box with coolant to ensure that the temperature sensor is completely immersed in the coolant. Then, place the optical element on the top of the suction cup and use an external vacuum pump and other equipment to vacuum the suction cup to ensure that the optical element is stably positioned. Adjust the lifting electric polishing head to the upper edge of the optical element and prepare for polishing. S2: Polishing start and intermittent coolant injection: Start the motor to drive the suction cup and the optical element to rotate at a constant speed, and start the lifting electric polishing head to perform polishing. As the motor starts, the intermittent spray assembly starts to work, and the coolant flows from the coolant box into the cylinder through the one-way valve pipe 1, and is intermittently sprayed onto the optical element through the one-way pipe 2 to play a cooling and cleaning role. At the same time, the dust suction assembly also starts to work, sucking in the air in the polishing box, and then discharged after being filtered by the dust filter plate to keep the working environment clean; S3: Automatic displacement of the polishing head and uniform polishing in all directions: As the coolant gradually decreases, the top temperature sensor is exposed to the liquid surface, and the trigger signal disconnects the circuit of the corresponding U-shaped electromagnetic block, causing it to lose its magnetic force. Under the pulling action of the adjustment spring, the slider drives the lifting electric polishing head to move to the next U-shaped electromagnetic block that still has magnetic force. The U-shaped metal block then adsorbs and fits with the new U-shaped electromagnetic block, so that the polishing head automatically and gradually moves toward the center of the optical element as the coolant level decreases. When the slider moves to the position of the last U-shaped electromagnetic block, the lifting electric polishing head is located at the center of the optical element, completing a full-range and uniform polishing operation. S4: Coolant recovery and reuse: During the polishing process, the brush at the lower end of the brush plate cleans the debris and residues produced by polishing. The receiving box collects the mixture and flows into the recovery box through the square tube. The mixture is filtered on the screen of the filter component. After the debris is screened out, the coolant is pumped back to the coolant tank through the water pump to achieve the recovery and reuse of the coolant.

[0017] S5: End of work and reset: Turn off the motor and lift the electric polishing head, stop the polishing operation, use the pull ring to pull the slider back to the initial position, that is, the position of the first U-shaped electromagnetic block, to prepare for the next polishing operation.

[0018] The beneficial effects of the present invention are: 1. The present invention realizes intermittent spraying of coolant through the intermittent spraying assembly, effectively reduces the temperature during polishing and improves polishing efficiency and quality. At the same time, compared with continuous spraying, the assembly saves the amount of coolant used, so that the water level inside the coolant tank can drop at a nearly uniform speed, providing favorable conditions for the operation of the drive assembly.

[0019] 2. The drive assembly designed in the present invention realizes the function of the polishing head automatically and gradually moving toward the center of the optical element as the coolant level decreases through intelligent control of the temperature sensor and the U-shaped electromagnetic block, thereby ensuring an all-round and uniform polishing effect. This design improves the polishing accuracy and consistency, reduces manual intervention compared to electric drive, has a relatively simple structural principle, and improves processing efficiency.

[0020] 3. The present invention ensures that the U-shaped metal block and the U-shaped electromagnetic block can be accurately and stably adsorbed and fitted, and the edges are perfectly aligned through the limiting component, which not only improves the positioning accuracy of the polishing head, but also reduces the polishing quality problems caused by misalignment or inability to stay. At the same time, the design of the component also enhances the stability and reliability of the system.

[0021] 4. The dust collection component of the present invention realizes the effective adsorption and filtration of dust and smoke generated inside the polishing box by linking the intermittent liquid spraying component. This maintains a relatively clean working environment, which is conducive to improving the polishing quality and extending the service life of the equipment. At the same time, the component also saves electricity and improves the energy efficiency of the overall system.

[0022] 5. The filter assembly of the present invention realizes efficient recovery and reuse of coolant through the design of vibrating screen. The assembly not only has high filtering effect and prevents the clogging of screen, but also further improves the recovery efficiency of coolant through the cleaning of brush plate and the return water function of square tube. This design reduces the waste of coolant and production cost, and also has a positive impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 The overall three-dimensional structure of an optical element polishing device and a polishing method of the present invention Figure 1 ; Figure 2 The overall three-dimensional structure of an optical element polishing device and a polishing method of the present invention Figure 2 ; Figure 3 A partial three-dimensional diagram of an optical element polishing device and a polishing method according to the present invention Figure 1 ; Figure 4A partial three-dimensional diagram of an optical element polishing device and a polishing method according to the present invention Figure 2 ; Figure 5 A three-dimensional diagram of a dust collection component of an optical element polishing device and a polishing method according to the present invention; Figure 6 The present invention is an optical element polishing device and a polishing method Figure 5 A in the enlarged view; Figure 7 A three-dimensional diagram of a filter assembly of an optical element polishing device and a polishing method according to the present invention; Figure 8 A three-dimensional diagram of a driving component of an optical element polishing device and a polishing method according to the present invention Figure 1 ; Fig. 9 A three-dimensional diagram of a driving component of an optical element polishing device and a polishing method according to the present invention Figure 2 ; Fig.10 A three-dimensional diagram of a driving component of an optical element polishing device and a polishing method according to the present invention Figure 3 ; Fig.11 A three-dimensional diagram of a driving component of an optical element polishing device and a polishing method according to the present invention Figure 4 .

[0025] In the figure: 1. Polishing box; 11. Motor; 12. L-shaped bracket; 13. Polishing table; 14. Suction cup; 15. Optical element; 16. Lifting electric polishing head; 17. Coolant box; 18. Recovery box; 19. Water pump; 110. Brush plate; 111. Receiving box; 112. Square tube; 2. Intermittent spray assembly; 21. Cylinder; 22. V-shaped groove; 23. Sliding ball; 24. Lifting block; 25. Support rod; 26. Drive rod; 27. Piston rod; 28. Cylinder; 29. ​​One-way valve tube 1; 210. One-way tube 2; 2101. Fixed tube; 2102. Telescopic tube; 3. Drive assembly; 3 1. U-shaped electromagnetic block; 32. Temperature sensor; 33. Sliding block; 331. U-shaped metal block; 34. Adjusting spring; 35. Ball; 36. Guide rod; 361. Pull ring; 4. Limiting assembly; 41. Hollow plate; 42. Reset spring; 43. Baffle; 5. Dust suction assembly; 51. Diffuser cover; 52. Turbine; 53. Pulley; 54. Fan blade; 55. Belt; 56. Bellows; 57. Filter box; 58. Dust filter plate; 6. Filter assembly; 61. Filter frame; 62. Screen; 63. Horizontal plate one; 64. Horizontal plate two; 65. Vertical rod; 66. Vibration spring; 67. Pull rod. DETAILED DESCRIPTION

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] like Figure 1-Figure 11 As shown, an optical element polishing device and a polishing method of the present invention include: a polishing box 1, an L-shaped bracket 12 and a motor 11 are installed inside the polishing box 1, a cylindrical polishing table 13 is installed on the side of the L-shaped bracket 12, a suction cup 14 is rotatably installed inside the polishing table 13, the rotation shaft of the suction cup 14 is connected to the shaft of the motor 11, and the top of the suction cup 14 is used to install an optical element 15, so as to drive the optical element 15 to rotate at a uniform speed during polishing, and a lifting electric polishing head 16 is movably installed on the upper end of the L-shaped bracket 12; The bottom of the polishing box 1 is provided with a coolant tank 17 and a recovery tank 18 for recovering the coolant. The shaft of the motor 11 is connected to the coolant tank 17 by an intermittent spray assembly 2 for intermittently spraying the coolant on the surface of the optical element 15. The upper end of the L-shaped bracket 12 is designed as a cavity, and is provided with a driving component 3 together with the optical element 15 and the coolant tank 17, including a row of temperature sensors 32 arranged vertically and installed on the inner wall of the coolant tank 17, and U-shaped electromagnetic blocks 31 arranged horizontally in the cavity at the upper end of the L-shaped bracket 12. The U-shaped electromagnetic blocks 31 and the temperature sensors 32 are the same in number and are electrically connected, that is, one U-shaped electromagnetic block 31 is electrically connected to the temperature sensor 32, the temperature sensor 32 is from top to bottom, and the U-shaped electromagnetic block 31 is from the direction close to the coolant tank 17, and the electrical connections correspond in sequence. There is a certain interval between the U-shaped electromagnetic blocks 31, and the inner side of the U-shaped electromagnetic block 31 can be adsorbed and fitted with the U-shaped metal block 331, and the U-shaped metal block 331 is embedded in the recess at one end of the slider 33, and the outer The surfaces are aligned, the slider 33 slides in the cavity at the upper end of the L-shaped bracket 12 and the bottom is docked with the lifting electric polishing head 16, and the connecting piece of the two slides in the cavity opening of the L-shaped bracket 12. It can also be understood that the slider 33 slides on the inside of the U-shaped electromagnetic block 31, and one end of the slider 33 is connected to the inner wall of the cavity with an adjusting spring 34. One side of the slider 33 is provided with four groups of limit assemblies 4, and contacts with the U-shaped electromagnetic block 31 to limit the position. The coolant box 17 is connected to the intermittent spray assembly 2 and the polishing box 1 with a dust suction assembly 5, which is used to absorb the dust and smoke generated by the internal operation of the polishing box 1. The recovery box 18 is used to recover the coolant, and the filter assembly 6 is movably installed inside. The filter assembly 6 is driven by the intermittent spray assembly 2 to vibrate up and down to avoid clogging.

[0028] Through the above structural design, when the present invention is working, the coolant box 17 is filled with coolant at the beginning, and the temperature sensor 32 is immersed in the coolant. At this time, the sensing temperature will be very low, and it is electrically connected to the controller of the U-shaped electromagnetic block 31. The temperature sensor 32 intelligently controls the switch state of the U-shaped electromagnetic block 31 through temperature sensing. When the coolant level gradually decreases due to the spraying, once a temperature sensor 32 is exposed to the liquid surface, its temperature sensing will trigger a signal to disconnect the circuit of the corresponding U-shaped electromagnetic block 31, so that it loses its magnetic force. Then, before working, place the optical element 15 on the top of the suction cup 14, and a one-way valve tube can be designed on the suction cup 14, and an external vacuum pump is used. The conventional design of vacuum adsorption of the equipment is as follows: the optical element 15 can be positioned. At this time, the lifting electric polishing head 16 (the conventional design is as follows: the combination of electric push rod, high-speed motor and polishing head, which will not be described in detail here) is located at the upper edge of the optical element 15, and the polishing head is driven down to fit the top of the optical element 15 near the edge. At the same time, the U-shaped metal block 331 on the slider 33 is located at the edge of the U-shaped electromagnetic block 31, that is, the U-shaped metal block 331 and the edge of the U-shaped electromagnetic block 31 fit and adsorb, and the edges are aligned, the widths of the two are the same, and the spring 34 is adjusted to be in a stretched state. Then, the lifting electric The polishing head 16 is polished, and at the same time, the motor 11 is started to drive the suction cup 14 and the optical element 15 to rotate for polishing, and the intermittent spray assembly 2 intermittently sprays the coolant box 17 onto the optical element 15 to cool and clean it. As time goes by, the coolant gradually decreases, and the uppermost temperature sensor 32 is exposed to the liquid surface. Its temperature sensing will trigger a signal to disconnect the circuit of the corresponding U-shaped electromagnetic block 31, causing it to lose its magnetic force. At this time, due to the pulling effect of the adjustment spring 34, the slider 33 will drive the lifting electric polishing head 16 to move to the next U-shaped electromagnetic block 31 that still has magnetic force, and the U-shaped metal block 331 will then contact the new U-shaped electromagnetic block. 31 is adsorbed and fitted, and the edges are aligned, and this process is repeated. Finally, the electric polishing head 16 is lifted and moved to the center of the optical element 15 to complete the polishing. This process realizes that the polishing head automatically and gradually moves toward the center of the disc lens as the coolant level decreases, so as to perform all-round and uniform polishing. When the coolant is used up, the last U-shaped electromagnetic block 31 loses its magnetic force, but at this time there is a baffle at the bottom of the cavity of the L-shaped bracket 12 against the slider 33, which is the initial position. At this time, the electric polishing head 16 is lifted and moved to the center of the optical element 15 for polishing. Before the next polishing, the slider 33 can be pulled down to the position of the first U-shaped electromagnetic block 31.

[0029] The limiting assembly 4 includes a hollow plate 41 fixed on the front side of the slider 33, a return spring 42 is installed inside the hollow plate 41, and the return spring 42 is connected to a baffle 43, which passes through the opening of the hollow plate 41 to form a sliding connection. One end of the baffle 43 is designed to be arc-shaped, and the arc surface contacts the side of the U-shaped electromagnetic block 31. The baffle 43 can pass through the gap between each U-shaped electromagnetic block 31.

[0030] Through the design of the limit component 4, in order to ensure that the U-shaped metal block 331 and the U-shaped electromagnetic block 31 can be accurately and stably adsorbed and fitted, and the edges are perfectly aligned, the tension provided by the upper adjustment spring 34 is set to be greater than the magnetic adsorption force between the U-shaped electromagnetic block 31 and the U-shaped metal block 331. Then, according to common sense, the U-shaped metal block 331 cannot stay on the inside of the U-shaped electromagnetic block 31, and will be misplaced or unable to stay. Then, during the movement of the slider 33, when the U-shaped metal block 331 and the edge of the U-shaped electromagnetic block 31 are perfectly aligned and fitted, the baffle 43 will also contact the side wall of the U-shaped electromagnetic block 31, and the arc surface of one end of the baffle 43 will contact the side of the U-shaped electromagnetic block 31. When it is necessary to move to the next U-shaped electromagnetic block 31, a pulling force is required to make it overcome the elastic force of the reset spring 42 and first shrink to the inside of the hollow plate 41, and the edge first slides with the side wall of the U-shaped electromagnetic block 31 to reach the U-shaped electromagnetic block 31. It will pop up again when there is a gap, but when the U-shaped electromagnetic block 31 has magnetic force, the adsorption force plus the strength of the reset spring 42 is just equal to the tension of the adjusting spring 34, which can serve as an auxiliary force to help the two fit more closely, while reducing the slight misalignment caused by the excessive tension of the adjusting spring 34. Note that during the next polishing, you can also use the arc design to slowly pull it back, and it can move in both directions. At the same time, the magnetic force of each U-shaped electromagnetic block 31 is different, because the elastic force of the adjusting spring 34 is different in different tensile states, and it can be designed according to actual conditions, which will not be elaborated here. The adjusting spring 34 also needs regular maintenance, inspection and replacement. At the same time, the temperature sensor 32 is not necessarily distributed at equal intervals, because the liquid level decreases at a close to uniform speed, and the closer to the optical element 15, the lower the polishing time may be required. Therefore, it can also be set according to actual conditions, which will not be elaborated here.

[0031] Two rows of balls 35 are installed in the ball groove at the bottom of the slider 33 , and the balls 35 roll on the surface of the cavity at the upper end of the L-shaped bracket 12 .

[0032] The design of the ball 35 can reduce the resistance of the slider 33 to the maximum extent and improve the smoothness of its sliding.

[0033] The intermittent liquid spraying assembly 2 includes a cylinder 21 fixed on the shaft of the motor 11, and the outer wall of the cylinder 21 is provided with a continuous surrounding V-shaped groove 22, and a sliding ball 23 is installed in the V-shaped groove 22. One side of the sliding ball 23 is fixed to the side wall of the lifting block 24, and the lifting block 24 slides on two support rods 25. The support rods 25 are fixed between the bottom of the polishing table 13 and the polishing box 1. One side of the lifting block 24 is hinged with a driving rod 26, and one side of the driving rod 26 is rotatably connected to one side of the piston rod 27. The piston rod 27 passes through one side of the cylinder 28, and the piston on one side of the piston rod 27 is in the cylinder 28. The piston rod 27 also slides on the supporting block inside the polishing box 1, and the cylinder 28 is fixed on another supporting block inside the polishing box 1. A one-way valve tube 29 installed on one side of the cylinder 28 passes through the top of the coolant tank 17, and a one-way tube 210 is installed on the top of the cylinder 28. The outlet end of the one-way tube 210 is located on one side of the lifting electric polishing head 16. The one-way valve tube 29 is designed to only transport water to the inside of the cylinder 28, while the one-way tube 210, on the contrary, can only conduct water outward. This is an existing conventional design, and its principle will not be elaborated here.

[0034] Through the design of the intermittent liquid spraying component 2, during the grinding process, when the motor 11 is started, the shaft drives the cylinder 21 to rotate. As the cylinder 21 rotates, the sliding ball 23 slides back and forth up and down in the V-shaped groove 22. When the sliding ball 23 slides in the V-shaped groove 22, it drives the lifting block 24 to slide up and down on the two support rods 25. The support rod 25 is fixed between the bottom of the polishing table 13 and the polishing box 1, providing a stable sliding track for the lifting block 24. When the lifting block 24 slides up and down, it will drive the piston rod 27 to reciprocate in the cylinder 28 through the driving rod 26. The piston on one side of the piston rod 27 slides in a sealed manner inside the cylinder 28. When the piston rod 27 moves forward, the piston compresses the water in the cylinder 28 and sprays it outward through the one-way pipe 210; when the piston rod 27 moves backward, the pressure in the cylinder 28 decreases, and the water in the coolant tank 17 is sucked into the cylinder 28 through the one-way valve pipe 29. Since the rotation of the cylinder 21 is continuous, and the shape of the V-shaped groove 22 The sliding ball 23 slides back and forth in the groove, so the reciprocating motion of the lifting block 24, the driving rod 26 and the piston rod 27 is also continuous. However, due to the presence of the one-way valve tube 1 29 and the one-way tube 210, the water in the cylinder 28 can only be sprayed outward through the one-way tube 210 when the water is compressed to a certain extent, thereby realizing intermittent liquid injection. By intermittently spraying the coolant, the temperature in the polishing process can be effectively reduced, and the polishing efficiency and quality can be improved. Compared with continuous injection, the amount of coolant used can be saved and the effect is better, so that the water level inside the coolant tank 17 can drop at a nearly uniform speed, cooperating with the operation of the drive component 3.

[0035] The one-way tube 210 is divided into a fixed tube 2101 and a telescopic tube 2102. One end of the fixed tube 2101 is fixed on the top of the cylinder 28, and the other end of the fixed tube 2101 is inserted with the telescopic tube 2102 to form a sliding connection. The telescopic tube 2102 is connected to the slider 33 through the guide rod 36. The guide rod 36 passes through the L-shaped bracket 12 and enters its cavity. A pull ring 361 is fixed on one end of the guide rod 36. Note that the one-way valve is arranged on the fixed tube 2101.

[0036] Through the telescopic design of the one-way tube 210, whenever the slider 33 is displaced, the guide rod 36 pulls the telescopic tube 2102 to slide on the fixed tube 2101, thereby ensuring that the water outlet pipe of the telescopic tube 2102 is always located on one side of the lifting electric polishing head 16, in a suitable spraying position, to ensure maximum effect, and the pull ring 361 facilitates the resetting of the slider 33 after the work is completed, so as to facilitate the next work. It should be noted that the impact force of the water flow can be ignored, and will not affect the U-shaped metal block 331 and the U-shaped electromagnetic block 31. At the same time, the vibration force of fine grinding is small, and its influence is also negligible.

[0037] The dust collection assembly 5 includes a diffusion cover 51 connected to the inlet end of the one-way valve pipe 29, and a turbine 52 is rotatably installed inside the diffusion cover 51. The rotating shaft of the turbine 52 passes through the coolant tank 17 and is connected to a pulley 53. The pulley 53 is connected to a second pulley 53 through a belt 55, and this pulley 53 is rotatably installed on the side wall of a bellows 56. The bellows 56 is fixed to the side wall of the polishing box 1, and a fan blade 54 is rotatably installed inside. The fan blade 54 and the pulley 53 share a rotating shaft. A filter box 57 is installed on the inside of the polishing box 1, and a dust filter plate 58 is installed inside the filter box 57, and an air inlet duct is installed on one side. The polishing box 1, the filter box 57 and the bellows 56 are connected on the docking surface with a circular opening, and the other side of the bellows 56 is also provided with a circular opening for air outlet.

[0038] Through the design of the dust suction component 5, when the intermittent liquid spraying component 2 is working, the coolant flows from the coolant tank 17 into the cylinder 28 through the one-way valve pipe 29. In this process, the suction or pressure change generated by the flow of the coolant will drive the turbine 52 in the expansion housing 51 to rotate, and the rotation of the turbine 52 is transmitted to the second pulley 53 through the rotating shaft and the pulley 53 and the belt 55, thereby driving the fan blade 54 to rotate in the bellows 56. The rotation of the fan blade 54 generates wind force, which is sucked into the air in the polishing box 1 through the air inlet pipe of the filter box 57. The sucked air is filtered by the dust filter plate 58, and the dust and particles are left on the filter plate, while the clean air enters the bellows 56 through the connecting circular opening of the filter box 57 and the bellows 56, and is finally discharged from the outside of the polishing box 1 from the air outlet circular opening on the other side of the bellows 56, realizing intermittent dust suction processing, thereby maintaining a relatively clean working environment, which is conducive to improving the polishing quality and extending the service life of the equipment, and saving electric energy through the linkage of the intermittent liquid spraying component 2.

[0039] A brush plate 110 is installed at the lower end of the suction cup 14, and the brush of the brush plate 110 is in contact with the surface of the polishing table 13, and a fan-shaped triangular opening is provided on the polishing table 13, and a receiving box 111 is installed below the triangular opening, and a square tube 112 connected to the bottom end of the receiving box 111 penetrates the recovery box 18 and is located above the filter assembly 6, and the filter assembly 6 includes a filter frame 61 located inside the coolant box 17, and an inclined screen 62 is installed inside the filter frame 61, and the outlet end of the square tube 112 is located at the upper end of the inclined surface of the screen 62, and a horizontal plate 63 is fixed on both sides of the filter frame 61, and the horizontal plate 63 is connected by a row of vertical rods 6 5 passes through, the vertical rod 65 is fixed on one side of the horizontal plate 2 64, the horizontal plate 2 64 is fixed on both sides of the inner wall of the coolant box 17, a row of vibration springs 66 are connected between the horizontal plate 2 64 and the horizontal plate 1 63, the vibration spring 66 is sleeved on the outside of the vertical rod 65, a pull rod 67 is fixed on the top of the filter frame 61, the pull rod 67 passes through the coolant box 17 and the polishing box 1, and a magnetic piece is fixed on the top, the magnetic piece is located below the lifting block 24, and can be adsorbed with the lifting block 24, a water pump 19 is connected between the coolant box 17 and the recovery box 18, and is used to pump the recovered water into the coolant box 17.

[0040] Through the design of the filter assembly 6, during the grinding process, the coolant mixed with the grinding debris falls into the polishing table 13. During the polishing process, the brush at the lower end of the brush plate 110 rotates and fits tightly with the surface of the polishing table 13 to clean the debris and residues generated by polishing. The receiving box 111 is used to collect the debris and coolant cleaned from the polishing table 13. These mixtures pass through the square tube 112 at the bottom of the receiving box 111 into the recovery box 18. The mixture flowing into the receiving box 111 can be evenly distributed on the screen 62 for easy filtering, and the inclined design facilitates the debris to flow down along the inclined surface. And when the coolant is sprayed during operation, each time the lifting block 24 descends, it will adsorb the magnetic sheet, thereby driving the filter frame 61 to rise a short distance, and because the vibration spring 66 is pulled up and then detached, when the lifting block 24 continues to descend and detaches from the magnetic sheet, the filter frame 61 will rapidly drop due to the action of gravity and the elastic force of the vibration spring 66, producing a vibration effect, further preventing the screen 62 from being blocked, and through the cleaning of the brush plate 110, the return water of the square tube 112, and the design of the vibrating screen 62 of the filter assembly 6, efficient recovery and reuse of the coolant is achieved, and the filtering effect is high and there is no blockage.

[0041] The present invention also provides a polishing method of an optical element polishing device, comprising: S1: Preparation stage: First, fill the coolant box 17 with coolant to ensure that the temperature sensor 32 is completely immersed in the coolant. Then, place the optical element 15 on the top of the suction cup 14 and use an external vacuum pump or other equipment to vacuum adsorb the suction cup 14 to ensure that the optical element 15 is stably positioned. Adjust the lifting electric polishing head 16 to the upper edge position of the optical element 15 and prepare for polishing.

[0042] S2: Polishing start and intermittent coolant injection: Start the motor 11 to drive the suction cup 14 and the optical element 15 to rotate at a constant speed, and at the same time start the lifting electric polishing head 16 to perform the polishing operation. As the motor 11 is started, the intermittent spray component 2 starts to work, and the coolant flows from the coolant tank 17 into the cylinder 28 through the one-way valve pipe 1 29, and is intermittently sprayed onto the optical element 15 through the one-way pipe 210, which plays a cooling and cleaning role. At the same time, the dust suction component 5 also starts to work, sucking in the air in the polishing box 1, and discharging it after filtering through the dust filter plate 58, so as to keep the working environment clean.

[0043] S3: Automatic displacement of the polishing head and uniform polishing in all directions: As the coolant gradually decreases, the uppermost temperature sensor 32 is exposed to the liquid surface, and the trigger signal disconnects the circuit of the corresponding U-shaped electromagnetic block 31, causing it to lose its magnetic force. Under the pulling action of the adjusting spring 34, the slider 33 drives the lifting electric polishing head 16 to move to the next U-shaped electromagnetic block 31 that still has magnetic force, and the U-shaped metal block 331 is then adsorbed and fitted with the new U-shaped electromagnetic block 31, so that the polishing head automatically and gradually moves toward the center of the optical element 15 as the coolant level decreases. When the slider 33 moves to the position of the last U-shaped electromagnetic block 31, the lifting electric polishing head 16 is located at the center of the optical element 15, completing an all-round and uniform polishing operation.

[0044] S4: Coolant recovery and reuse: During the polishing process, the brush at the lower end of the brush plate 110 cleans the debris and residues generated by polishing, the receiving box 111 collects the mixture and flows into the recovery box 18 through the square tube 112, the mixture is filtered on the screen 62 of the filter assembly 6, and after the debris is screened out, the coolant is pumped back to the coolant tank 17 through the water pump 19 to achieve the recovery and reuse of the coolant.

[0045] S5: End of work and reset: Turn off the motor 11 and the lifting electric polishing head 16, stop the polishing operation, and use the pull ring 361 to pull the slider 33 back to the initial position, that is, the position of the first U-shaped electromagnetic block 31, to prepare for the next polishing operation.

[0046] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An optical element polishing device, characterized in that: include: A polishing box (1), wherein an L-shaped bracket (12) and a motor (11) are installed inside the polishing box (1), a polishing table (13) is installed on the side of the L-shaped bracket (12), a suction cup (14) is rotatably installed inside the polishing table (13), the rotation axis of the suction cup (14) is connected to the shaft of the motor (11), the top of the suction cup (14) is used to install an optical element (15), and a lifting electric polishing head (16) is movably installed on the upper end of the L-shaped bracket (12); The bottom end of the polishing box (1) is provided with a coolant tank (17) and a recovery tank (18) for recovery, and the shaft of the motor (11) is connected to the coolant tank (17) through an intermittent liquid spraying assembly (2); The upper end of the L-shaped bracket (12) is designed as a cavity, and is provided with a driving component (3) together with the optical element (15) and the coolant tank (17), including a temperature sensor (32) arranged vertically and mounted on the inner wall of the coolant tank (17), and a U-shaped electromagnetic block (31) arranged horizontally in the cavity at the upper end of the L-shaped bracket (12). The U-shaped electromagnetic blocks (31) and the temperature sensors (32) are the same in number and are electrically connected. The inner side of the U-shaped electromagnetic block (31) can be adsorbed by the U-shaped metal block (331), and the U-shaped metal block (331) is embedded in a notch at one end of the slider (33). The slider (33) slides in the cavity at the upper end of the L-shaped bracket (12) and docks with the lifting electric polishing head (16) at the bottom. One end of the slider (33) is connected to the inner wall of the cavity with an adjusting spring (34). One side of the slider (33) is provided with a limit assembly (4) that can contact the U-shaped electromagnetic block (31); The cooling liquid tank (17) is connected to the intermittent liquid spraying assembly (2) and the polishing box (1) and is provided with a dust collecting assembly (5); A filter assembly (6) is movably installed inside the recovery box (18), and the filter assembly (6) is driven by the intermittent liquid spraying assembly (2) to vibrate up and down.

2. An optical element polishing device as claimed in claim 1, characterized in that: The limit assembly (4) comprises a hollow plate (41) fixed on the front side of the slider (33), a return spring (42) is installed inside the hollow plate (41), a baffle (43) is connected to the return spring (42), the baffle (43) passes through the opening of the hollow plate (41) to form a sliding connection, and one end of the baffle (43) is designed to be arc-shaped, and the arc surface contacts the side of the U-shaped electromagnetic block (31); The blocking piece (43) is capable of passing through the gap between each U-shaped electromagnetic block (31).

3. An optical element polishing device as claimed in claim 1, characterized in that: Two rows of balls (35) are installed in the ball groove at the bottom of the slider (33), and the balls (35) roll on the surface of the cavity at the upper end of the L-shaped bracket (12).

4. An optical element polishing device as claimed in claim 1, characterized in that: The intermittent liquid spraying assembly (2) comprises a cylinder (21) fixed on the shaft of the motor (11), the outer wall of the cylinder (21) is provided with a continuously surrounding V-shaped groove (22), a sliding ball (23) is installed in the V-shaped groove (22), one side of the sliding ball (23) is fixed to the side wall of a lifting block (24), the lifting block (24) slides on two support rods (25), the support rods (25) are fixed between the bottom of the polishing table (13) and the polishing box (1), and one side of the lifting block (24) is hinged with A driving rod (26), one side of the driving rod (26) is rotatably connected to one side of a piston rod (27), the piston rod (27) passes through one side of a cylinder (28), and the piston on one side of the piston rod (27) slides in a sealed manner inside the cylinder (28), a one-way valve pipe (29) installed on one side of the cylinder (28) passes through the top of the coolant tank (17), and a one-way pipe (210) is installed on the top of the cylinder (28), and the outlet end of the one-way pipe (210) is located at one side of the lifting electric polishing head (16).

5. An optical element polishing device as claimed in claim 4, characterized in that: The one-way tube (210) is divided into a fixed tube (2101) and a telescopic tube (2102). One end of the fixed tube (2101) is fixed to the top of the cylinder (28), and the other end of the fixed tube (2101) is inserted with the telescopic tube (2102) to form a sliding connection. The telescopic tube (2102) is connected to the slider (33) via a guide rod (36). The guide rod (36) passes through the L-shaped bracket (12) and enters its cavity. A pull ring (361) is fixed to one end of the guide rod (36).

6. An optical element polishing device as claimed in claim 5, characterized in that: The dust collecting assembly (5) comprises a diffusion cover (51) connected to the inlet end of the one-way valve pipe (29), a turbine (52) being rotatably mounted inside the diffusion cover (51), a rotating shaft of the turbine (52) passing through a coolant tank (17) and docking with a pulley (53), the pulley (53) being connected to a second pulley (53) via a belt (55), and the pulley (53) being rotatably mounted on the side wall of a wind box (56), the wind box (56) being fixed to the side wall of a polishing box (1) and having a fan blade (54) rotatably mounted inside, the fan blade (54) and the pulley (53) sharing a rotating shaft, a filter box (57) being mounted inside the polishing box (1), a dust filter plate (58) being mounted inside the filter box (57), and an air inlet pipe being mounted on one side; The polishing box (1), the filter box (57) and the air box (56) are provided with communicating circular openings on their butt surfaces, and the other side of the air box (56) is also provided with a circular opening for air outlet.

7. An optical element polishing device as claimed in claim 6, characterized in that: A brush plate (110) is installed at the lower end of the suction cup (14), and the brush of the brush plate (110) is in contact with the surface of the polishing table (13). The polishing table (13) is provided with a fan-shaped triangular opening, and a receiving box (111) is installed below the triangular opening. The bottom end of the receiving box (111) is connected to a square tube (112) installed and penetrates into the recovery box (18) and is located above the filter assembly (6). A water pump (19) is connected between the coolant tank (17) and the recovery tank (18) for pumping recovered water into the coolant tank (17).

8. An optical element polishing device as claimed in claim 7, characterized in that: The filter assembly (6) comprises a filter frame (61) located inside a coolant tank (17), an inclined screen (62) is installed inside the filter frame (61), the outlet end of the square tube (112) is located at the upper end of the inclined surface of the screen (62), horizontal plates (63) are fixed on both sides of the filter frame (61), and the horizontal plate (63) is penetrated by a row of vertical rods (65), the vertical rods (65) are fixed on one side of horizontal plate (64), and the horizontal plate (64) is fixed on both sides of the inner wall of the coolant tank (17), and a row of vibration springs (66) are connected between the horizontal plate (64) and the horizontal plate (63), and the vibration springs (66) are sleeved on the outside of the vertical rods (65).

9. An optical element polishing device as claimed in claim 8, characterized in that: A pulling rod (67) is fixed on the top of the filter frame (61), the pulling rod (67) passes through the coolant tank (17) and the polishing tank (1), and a magnetic sheet is fixed on the top, the magnetic sheet is located below the lifting block (24) and can be adsorbed by the lifting block (24).

10. A polishing method for an optical element polishing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Preparation stage: First, the coolant box (17) is filled with coolant to ensure that the temperature sensor (32) is completely immersed in the coolant. Next, the optical element (15) is placed on top of the suction cup (14), and the suction cup (14) is vacuum-adsorbed using an external vacuum pump to ensure that the optical element (15) is stably positioned. The lifting electric polishing head (16) is adjusted to the upper edge of the optical element (15) to prepare for polishing. S2: Polishing start and intermittent coolant injection: The motor (11) is started to drive the suction cup (14) and the optical element (15) to rotate at a constant speed, and the lifting electric polishing head (16) is started to perform the polishing operation. As the motor (11) is started, the intermittent liquid spraying assembly (2) starts to work, and the coolant flows from the coolant tank (17) into the cylinder (28) through the one-way valve pipe (29), and is intermittently sprayed onto the optical element (15) through the one-way pipe (210), thereby playing a cooling and cleaning role. At the same time, the dust suction assembly (5) also starts to work, sucking in the air in the polishing box (1), and then discharging it after being filtered by the dust filter plate (58), thereby keeping the working environment clean; S3: Automatic displacement of the polishing head and uniform polishing in all directions: As the coolant gradually decreases, the uppermost temperature sensor (32) is exposed to the liquid surface, and a trigger signal disconnects the circuit of the corresponding U-shaped electromagnetic block (31), causing it to lose its magnetic force. Under the pulling action of the adjustment spring (34), the slider (33) drives the lifting electric polishing head (16) to move to the next U-shaped electromagnetic block (31) that still has magnetic force, and the U-shaped metal block (331) is then adsorbed and fitted with the new U-shaped electromagnetic block (31), so that the polishing head automatically and gradually moves toward the center of the optical element (15) as the coolant level decreases. When the slider (33) moves to the position of the last U-shaped electromagnetic block (31), the lifting electric polishing head (16) is located at the center of the optical element (15), completing a full-range and uniform polishing operation; S4: Coolant recovery and reuse: During the polishing process, the brush at the lower end of the brush plate (110) cleans the debris and residue generated by polishing, the receiving box (111) collects the mixture and flows into the recovery box (18) through the square tube (112), the mixture is filtered on the screen (62) of the filter component (6), and after the debris is screened out, the coolant is pumped back to the coolant tank (17) through the water pump (19), thereby realizing the recovery and reuse of the coolant; S5: End of work and reset: The motor (11) and the lifting electric polishing head (16) are turned off to stop the polishing operation, and the slider (33) is pulled back to the initial position, i.e., the position of the first U-shaped electromagnetic block (31), by using the pull ring (361) to prepare for the next polishing operation.

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