Cooling mechanism for high-precision spherical lens processing

Abstract

This utility model relates to the technical field of spherical lens processing equipment, specifically a cooling mechanism for high-precision spherical lens processing. An annular box is located below the top base. The middle part of the annular box has a slot pierced by a vertical pipe. Inside the annular box is a guide channel communicating with the slot. The annular box is rotatably connected to the vertical pipe. The top of the vertical pipe has multiple water outlet holes communicating with the guide channel. Multiple guide pipes are symmetrically arranged on both sides of the annular box. A nozzle is located at the top of each guide pipe, positioned around the periphery of the top base. This design abandons the traditional fixed nozzle design. A drive assembly (motor, shaft, gear, gear ring) drives the annular box to rotate around the vertical pipe, causing the nozzle to move synchronously with the annular box. Combined with the uniform liquid distribution through the guide channel and guide pipes within the annular box, this achieves multi-angle, full-coverage spraying of coolant onto the lens grinding area, completely solving the cooling blind spot problem of fixed nozzles.

Description

Technical Field

[0001] This utility model relates to the technical field of spherical lens processing equipment, specifically a cooling mechanism for high-precision spherical lens processing. Background Technology

[0002] In fields such as optical instruments and semiconductor equipment, the surface accuracy of high-precision spherical lenses directly determines the performance of optical systems. During the processing, the high-speed friction between the mold and the lens generates a large amount of heat. If the cooling is not timely or uneven, it can easily lead to thermal deformation and surface burns of the lens, seriously affecting the processing accuracy.

[0003] Existing cooling mechanisms for spherical lens processing mostly employ a fixed nozzle design, which has significant drawbacks: First, fixed nozzles cannot adapt to changes in the curvature of the spherical lens. When the contact trajectory between the mold and the lens changes dynamically, the nozzle spray range remains fixed, easily leading to cooling blind spots and excessively high local temperatures in the friction area. Second, the coolant spraying method of a single DC nozzle has a narrow coverage area, making it difficult to fully cover the friction area, resulting in low heat dissipation efficiency. Furthermore, uneven local cooling intensity can easily cause stress concentration inside the lens. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a cooling mechanism for high-precision spherical lens processing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a cooling mechanism for processing high-precision spherical lenses, including a processing table, an annular baffle fixedly installed at the upper end of the processing table, a drain pipe provided at the lower end of the processing table, a vertical pipe vertically installed in the middle part of the processing table, a top seat fixedly installed at the top of the vertical pipe, and a placement groove provided on the top seat;

[0008] Below the top seat is an annular box. The middle part of the annular box has a slot through which a vertical pipe passes. Inside the annular box is a guide channel communicating with the slot. The annular box is rotatably connected to the vertical pipe. The top of the vertical pipe has multiple water outlet holes communicating with the guide channel. Multiple guide pipes are symmetrically arranged on both sides of the annular box. The top of the guide pipes is equipped with a nozzle. The nozzle is located on the periphery of the top seat. The nozzle, guide pipe, and guide channel are connected in sequence. A toothed ring is fixedly installed on the top of the annular box. A drive assembly for driving the annular box to rotate is fixedly installed at the lower end of the top seat.

[0009] To make the spherical lens more securely placed in the placement slot, the present invention includes the following improvements: two propulsion components are symmetrically arranged on both sides of the top seat, two cavities are symmetrically arranged on the inner wall of the placement slot, and clamping blocks are provided in the cavities. The propulsion components are fixed on the outer wall of the top seat, and the output end of the propulsion components is provided with a drive rod connected to the clamping blocks. The two clamping blocks have the same structure, and the inner side of the clamping blocks is provided with an arc-shaped groove.

[0010] Furthermore, an improvement of this invention is that both of the aforementioned propulsion components employ electric push rods.

[0011] To make the annular box more securely installed, the improvement of this utility model is that a sealed bearing, which is penetrated by a vertical pipe, is provided at the top and bottom of the symmetrical guide groove of the inner ring of the empty groove. The inner ring of the sealed bearing is interference-fitted with the vertical pipe, and the outer ring of the sealed bearing is interference-fitted with the annular box.

[0012] To facilitate the rotation of the annular box with the nozzle, the present invention includes an improvement in which the drive assembly includes a motor and a gear. The motor is fixed at the lower end of the top base, and the output end of the motor is provided with a rotating shaft that connects to the gear, which meshes with the gear ring.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a cooling mechanism for high-precision spherical lens processing, which has the following advantages:

[0015] Abandoning the traditional fixed nozzle design, the ring box is driven to rotate around the vertical tube by a drive component (motor, shaft, gear, gear ring), so that the nozzle moves synchronously with the ring box. With the uniform liquid distribution of the guide groove and guide tube inside the ring box, the coolant can be sprayed to the lens grinding area from multiple angles, which completely solves the problem of cooling blind spots of fixed nozzles. At the same time, the "ring movement + multiple nozzles" design expands the cooling coverage area, avoids lens thermal deformation and surface burn caused by local high temperature, and significantly improves heat dissipation efficiency and processing yield. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation structure of the clamping block in this utility model;

[0019] Figure 4 This is a schematic diagram of the flow guide channel in this utility model;

[0020] Figure 5 This is a schematic diagram of the water outlet hole in this utility model;

[0021] In the diagram: 1. Processing table; 2. Annular baffle; 3. Drain pipe; 4. Vertical pipe; 5. Top seat; 6. Placement slot; 7. Propulsion assembly; 8. Cavity; 9. Clamping block; 10. Annular box; 11. Guide pipe; 12. Nozzle; 13. Gear ring; 14. Motor; 15. Gear; 16. Guide channel; 17. Empty slot; 18. Water outlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 The present invention discloses a cooling mechanism for processing high-precision spherical lenses, including a processing table 1, an annular baffle 2 fixedly installed at the upper end of the processing table 1, a drain pipe 3 provided at the lower end of the processing table 1, a vertical pipe 4 vertically installed in the middle part of the processing table 1, a top seat 5 fixedly installed at the top end of the vertical pipe 4, and a placement groove 6 provided on the top seat 5.

[0024] Below the top seat 5 is an annular box 10. The middle part of the annular box 10 has a slot 17 through which the vertical pipe 4 passes. Inside the annular box 10 is a guide channel 16 communicating with the slot 17. The annular box 10 is rotatably connected to the vertical pipe 4. The top of the vertical pipe 4 has multiple water outlet holes 18 communicating with the guide channel 16. Multiple guide pipes 11 are symmetrically arranged on both sides of the annular box 10. The top of the guide pipe 11 is equipped with a nozzle 12. The nozzle 12 is located on the periphery of the top seat 5. The nozzle 12, the guide pipe 11, and the guide channel 16 are connected in sequence. A toothed ring 13 is fixedly installed on the top of the annular box 10. A drive assembly for driving the annular box 10 to rotate is fixedly installed at the lower end of the top seat 5.

[0025] Both of the aforementioned propulsion components 7 employ electric push rods.

[0026] Positioning and fixing of spherical lenses:

[0027] Two propulsion components 7 are symmetrically arranged on both sides of the top seat 5. Two cavities 8 are symmetrically arranged on the inner wall of the placement groove 6. A clamping block 9 is provided in the cavity 8. The propulsion components 7 are fixed on the outer wall of the top seat 5. The output end of the propulsion components 7 is provided with a drive rod connected to the clamping block 9. The two clamping blocks 9 have the same structure, and the inner side of the clamping block 9 is provided with an arc-shaped groove.

[0028] The spherical lens to be processed is placed in the placement slot 6 on the top seat 5, and then the propulsion assembly 7 fixed on both sides of the outer wall of the top seat 5 is activated.

[0029] The output end of the propulsion component 7 drives the clamping block 9 in the cavity 8 inside the placement groove 6 to move via the drive rod. Since the two clamping blocks 9 have the same structure and have an arc groove on the inner side, they can closely fit the outer contour of the spherical lens, thus achieving stable clamping of the lens in the placement groove 6 and avoiding lens displacement during processing that could affect accuracy.

[0030] Connection and preparation of cooling pipes:

[0031] The vertical pipe 4 and the drain pipe 3 are respectively connected to the machine tool cooling water pipeline through designated conduits. The vertical pipe 4 is vertically set in the middle part of the machining table 1 to provide a channel for coolant delivery.

[0032] Drain pipe 3 is located at the lower end of processing table 1 and is used for coolant recovery.

[0033] Meanwhile, the annular baffle 2 fixed at the upper end of the processing table 1 can prevent coolant from overflowing during the subsequent cooling process, thus ensuring the subsequent recycling process.

[0034] Dynamic cooling during the polishing process:

[0035] Start the grinding equipment on the machine tool and have it perform grinding operations above the spherical lens.

[0036] At this time, the coolant transported by the machine tool cooling water pipeline flows upward along the vertical pipe 4 and enters the guide groove 16 inside the annular box 10 through multiple water outlet holes 18 at the top of the vertical pipe 4 (the annular box 10 is located below the top seat 5, and the hollow groove 17 in the middle allows the vertical pipe 4 to pass through).

[0037] After the coolant is distributed in the guide channel 16, it is transported to the top nozzle 12 through multiple guide pipes 11 symmetrically arranged on both sides of the annular box 10, and sprayed from the nozzle 12 toward the lens polishing area.

[0038] Synchronously start the drive component fixed at the lower end of the top mount 5:

[0039] The inner ring of the hollow groove 17 is symmetrically arranged with a sealed bearing 4 passing through it on the upper and lower sides of the guide groove 16. The inner ring of the sealed bearing is interference-fitted with the vertical pipe 4, and the outer ring of the sealed bearing is interference-fitted with the annular box 10.

[0040] The drive assembly includes a motor 14 and a gear 15. The motor 14 is fixed at the lower end of the top seat 5. The output end of the motor 14 is provided with a rotating shaft that connects to the gear 15. The gear 15 meshes with the gear ring 13.

[0041] The motor 14 drives the gear 15 to rotate through the shaft at the output end. The gear 15 meshes with the gear ring 13 fixed on the top of the annular box 10, thereby driving the annular box 10 to rotate around the vertical pipe 4 (the sealed bearings set on the upper and lower sides of the symmetrical guide groove 16 in the inner ring of the slot 17 can ensure the stability of the rotational connection between the annular box 10 and the vertical pipe 4, and at the same time prevent coolant leakage). Finally, it drives the nozzle 12 to move dynamically around the top seat 5, so as to achieve multi-angle full-coverage spray cooling of the spherical lens grinding area.

[0042] Coolant recovery and circulation:

[0043] During the grinding process, excess coolant drips onto the surface of the machining table 1. It is blocked by the annular baffle 2 and will not spread outward. It eventually flows into the return pipe of the machine tool cooling water pipeline along the drain pipe 3 at the lower end of the machining table 1, thus completing the recycling of coolant.

[0044] The clamping block 9 inside the cavity 8 is driven by the push components 7 (electric push rods) on both sides of the top seat 5. Combined with the arc groove design on the inner side of the clamping block 9, it can adapt to spherical lenses of different specifications and achieve tight clamping, avoiding surface accuracy deviation caused by lens displacement during grinding. Compared with the traditional design without a dedicated clamping structure, it greatly improves processing stability.

[0045] The sealed bearing (with an inner ring interference fit with the vertical tube 4 and an outer ring interference fit with the annular box 10) in the slot 17 of the annular box 10 ensures the coaxiality and stability of the annular box 10 during rotation, and effectively prevents the leakage of coolant in the guide groove 16, thus avoiding component corrosion. The machining table 1 provides stable support for the overall mechanism, and the annular baffle 2 assists in coolant recovery. The collaboration of these components enhances the reliability and service life of the mechanism.

[0046] Vertical pipe 4:

[0047] As the main channel for coolant, it must be pressure-resistant and corrosion-resistant, and is made of 304 stainless steel. Its pressure resistance is not less than 1.0MPa, which can withstand the working pressure of the machine tool cooling system. At the same time, the inner wall roughness is controlled at Ra≤0.8μm to reduce coolant flow resistance and avoid affecting the cooling effect due to uneven flow rate.

[0048] Top seat 5:

[0049] The lens needs to be supported and the drive assembly fixed, requiring both lightweight design and high strength. Therefore, LY12 aluminum alloy (heat-treated with T6) is used. This material has a density of only 2.78 g / cm³. 3 This reduces the overall load on the mechanism, while maintaining a yield strength of no less than 325MPa, ensuring stable support for the weight of the lens and drive components and preventing deformation over long-term use.

[0050] Placement slot 6:

[0051] Used to support lenses, the core requirements are wear resistance and no damage to the lens surface. Hard anodizing treatment (20μm oxide layer depth) is performed on the surface of the LY12 aluminum alloy substrate. After treatment, the surface hardness can reach ≥300HV, which can resist slight friction during the polishing process. At the same time, the coefficient of friction is ≤0.15, which can reduce the risk of surface scratches when placing and removing the lens.

[0052] Circular box 10:

[0053] The nozzle 12 needs to be rotated, and it must meet the requirements of being lightweight, high-strength, and having good dynamic balance. Therefore, aluminum alloy 6061-T6 (wall thickness 5mm) is selected. This material has a tensile strength of not less than 310MPa, and its structural strength is sufficient to support the weight of the nozzle 12 and the guide tube 11. It also has excellent machinability, which facilitates the machining of the internal guide groove 16. At the same time, its lightweight characteristics can reduce the load on the drive components and ensure smooth rotation.

[0054] Sealed bearings:

[0055] The function is to support the rotation of the annular housing 10 and prevent coolant leakage. It needs to have oil resistance and low friction characteristics, so a deep groove ball bearing 6005-2RS (inner diameter 25mm) is selected. The bearing has a built-in fluororubber seal, which can effectively prevent coolant from seeping into the bearing. The maximum speed can reach 12000r / min, which can adapt to the working speed requirements of the annular housing 10 and ensure smooth rotation without jamming.

[0056] Guide tube 11:

[0057] The material used to connect the guide channel 16 and the nozzle 12 must be resistant to bending and corrosion. It is made of 304 stainless steel, which can adapt to the angle changes when the annular box 10 rotates, avoiding bending and breakage. At the same time, the corrosion resistance of 304 stainless steel can prevent the pipe wall from rusting due to long-term contact with coolant.

[0058] Nozzle 12:

[0059] To achieve a ring-shaped, enveloping spray pattern, the core requirements are uniform atomization and adjustable angle. A stainless steel fan-shaped nozzle 12 (spray angle 60°) is selected. This nozzle 12 has a flow rate of 10L / min at a working pressure of 0.3MPa, and the spray range can cover the lens polishing area. It also adopts an anti-clogging design to prevent impurities in the coolant from clogging the nozzle 12, ensuring continuous cooling.

[0060] Gear ring 13:

[0061] For driving the rotation of the ring gear 10, high precision and wear resistance are required. 20CrMnTi material is selected and carburized and quenched (module 2, number of teeth 80). The surface hardness after treatment reaches HRC58-62, which can resist wear caused by long-term meshing. At the same time, the tooth surface roughness is controlled at Ra≤1.6μm to ensure smooth transmission when meshing with gear 15 and avoid speed fluctuations caused by insufficient tooth surface precision.

[0062] Gear 15:

[0063] For meshing transmission with gear ring 13, it must meet the requirements of strength matching and low noise. 45# steel is selected and quenched (module 2, number of teeth 16). The hardness of the tooth surface is controlled at HRC45-50 to form a reasonable match with the hardness of gear ring 13, reducing meshing wear. At the same time, the transmission efficiency is not less than 98%, and the noise during operation is low to avoid interfering with the machining environment.

[0064] Propulsion Component 7:

[0065] For lens clamping, stable thrust and controllable stroke are required, so the DT50 electric actuator (50mm stroke, 100N thrust) is selected. Compared with cylinders, electric actuators can avoid the instability of clamping force caused by air pressure fluctuations, with a repeatability accuracy of ±0.5mm and a response time of ≤0.3s. It can quickly complete the clamping and releasing of lenses, adapting to the processing rhythm.

[0066] Clamping block 9:

[0067] To ensure a secure fit to spherical lenses without damaging them, and to provide low friction and abrasion resistance, a polytetrafluoroethylene (PTFE) substrate coated with an abrasion-resistant layer is used. This material has a coefficient of friction ≤0.05, reducing friction with the lens surface during clamping and preventing scratches. Its Shore hardness is controlled at 50-60 Shore A, providing some elasticity to accommodate spherical lenses of varying curvatures and ensure a tight clamping fit.

[0068] Motor 14:

[0069] To drive the rotation of gear 15, a stable rotation speed and precise control are required. Therefore, a servo motor ECMA-C20604RS (400W power) is selected. Its rated speed is 3000 r / min and torque is 1.27 N·m. The speed can be precisely adjusted through the servo control system to ensure that the speed of the annular box 10 driving the nozzle 12 is uniform, avoiding uneven cooling caused by speed fluctuations.

[0070] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-precision spherical lens machining cooling mechanism, comprising a machining table (1), an annular baffle (2) is fixedly arranged at the upper end of the machining table (1), and a drain pipe (3) is arranged at the lower end of the machining table (1), characterized in that: The middle part of the processing table (1) is vertically provided with a vertical tube (4), and a top seat (5) is fixedly provided at the top of the vertical tube (4). The top seat (5) is provided with a placement groove (6). Below the top seat (5) is an annular box (10). The middle part of the annular box (10) is provided with a hollow groove (17) through which the vertical pipe (4) passes. Inside the annular box (10) is a guide groove (16) communicating with the hollow groove (17). The annular box (10) is rotatably connected to the vertical pipe (4). The top of the vertical pipe (4) is provided with multiple water outlet holes (18) communicating with the guide groove (16). Multiple guide pipes (11) are symmetrically arranged on both sides of the annular box (10). The top of the guide pipe (11) is provided with a nozzle (12). The nozzle (12) is located on the periphery of the top seat (5). The nozzle (12), the guide pipe (11) and the guide groove (16) are connected in sequence. A toothed ring (13) is fixedly provided on the top of the annular box (10). A drive assembly for driving the annular box (10) to rotate is fixedly provided at the lower end of the top seat (5).

2. The cooling mechanism for high-precision spherical lens processing according to claim 1, characterized in that: Two propulsion components (7) are symmetrically arranged on both sides of the top seat (5), and two cavities (8) are symmetrically arranged on the inner wall of the placement groove (6). A clamping block (9) is provided in the cavity (8). The propulsion component (7) is fixed on the outer wall of the top seat (5), and the output end of the propulsion component (7) is provided with a drive rod that connects to the clamping block (9).

3. The cooling mechanism for high-precision spherical lens processing according to claim 2, characterized in that: The two clamping blocks (9) have the same structure, and the inner side of the clamping block (9) is provided with an arc-shaped groove.

4. The cooling mechanism for high-precision spherical lens processing according to claim 3, characterized in that: Both of the propulsion components (7) are electric push rods.

5. The cooling mechanism for high-precision spherical lens processing according to claim 4, characterized in that: The inner ring of the hollow groove (17) is symmetrically guided by a guide groove (16) and a sealed bearing is provided above and below the vertical pipe (4). The inner ring of the sealed bearing is interference-fitted with the vertical pipe (4), and the outer ring of the sealed bearing is interference-fitted with the annular box (10).

6. The cooling mechanism for high-precision spherical lens processing according to claim 5, characterized in that: The drive assembly includes a motor (14) and a gear (15). The motor (14) is fixed at the lower end of the top seat (5). The output end of the motor (14) is provided with a shaft that connects to the gear (15). The gear (15) meshes with the gear ring (13).

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