High-precision grinding and polishing device for optical glass

Abstract

The application provides a high-precision grinding and polishing device for optical glass, and relates to the technical field of optical glass processing.The grinding and polishing device comprises an outer groove body, a plurality of workbench assemblies, a belt drive assembly, a driving box structure and a spraying assembly.The workbench assemblies can adsorb optical glass workpieces by negative pressure and rotate, and the belt drive assembly drives them to rotate synchronously.The driving box structure drives a plurality of polishing tools to swing synchronously, and the workpieces are polished intermittently and reciprocally.The outer groove body is provided with a spraying cleaner, and when the polishing tools swing back to above the spraying cleaner, the polishing liquid is sprayed to the polishing surface of the polishing tools to remove the debris.The spraying assembly sprays the polishing liquid to the top of the workbench assemblies.The application realizes the synchronous intermittent grinding of a plurality of workpieces by the cooperation of the reciprocating swing of the polishing tools and the continuous rotation of the workpieces.Meanwhile, the double-spraying cleaning mechanism for the workpieces and the polishing tools can effectively prevent the surface from being scratched by the debris, and significantly improves the polishing precision and the surface quality of the optical glass.

Description

Technical Field

[0001] This invention relates to the field of optical glass processing technology, and in particular to a high-precision grinding and polishing apparatus for optical glass. Background Technology

[0002] Optical glass is a fundamental and crucial component of the optoelectronic technology industry, widely used in the optical systems of devices such as camera lenses, microscopes, telescopes, laser windows, and smartphones. These applications place extremely high demands on the surface quality of optical glass components, and their processing typically involves multiple stages, including cutting, milling, grinding, and polishing. Among these, grinding and polishing are the core processes that determine the final surface accuracy and surface roughness of optical components. Their goal is to remove the damage layer left by previous processes and obtain an ultra-smooth surface that meets optical requirements.

[0003] In existing technologies, multi-station grinding and polishing devices are commonly used to improve processing efficiency. For example, a common device uses multiple rotatable workpiece axes and a common polishing disc to simultaneously polish multiple workpieces on one side. While such devices enable mass production, they still suffer from at least the following technical drawbacks in practical applications:

[0004] Firstly, polishing debris can easily damage the workpiece surface. During the polishing process, abrasive particles and glass shards that detach from the workpiece and polishing pad mix with the polishing fluid. If these debris are not removed in time and remain at the polishing interface, they can cause scratches or pitting on the workpiece surface, severely reducing polishing accuracy and yield. Existing devices mostly only supply polishing fluid to the workpiece area, making it difficult to effectively and quickly flush the debris away from the polishing zone.

[0005] Secondly, there is a time conflict between polishing and cleaning. To achieve a high-quality surface, it is best to clean the polishing tool promptly after each pass to keep the polished surface clean. However, in continuous polishing mode, the polishing tool is always in contact with the workpiece, lacking a dedicated time window for cleaning. This causes debris to accumulate on the polishing tool, ultimately affecting the quality of subsequent processing. Summary of the Invention

[0006] The purpose of this invention is to provide a high-precision grinding and polishing device for optical glass to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high-precision grinding and polishing device for optical glass includes an outer tank, a worktable assembly, a belt drive assembly, a drive housing structure, and a jetting assembly. Multiple worktable assemblies are evenly spaced inside the outer tank. Optical glass workpieces are mounted on the top surface of each worktable assembly via negative pressure suction and can rotate around their center. The belt drive assembly is connected to all worktable assemblies to drive them to rotate synchronously. The drive housing structure is located on the side of the outer tank and houses multiple polishing tools. One end of each polishing tool extends to the upper surface of a worktable assembly and polishes the worktable. The optical glass workpiece at the top of the assembly is polished. The drive housing structure is used to drive multiple polishing tools to move synchronously. The polishing tools reciprocate in contact with the optical glass workpiece in an oscillating manner. Multiple spray cleaners are also provided inside the outer tank. The spray cleaners are located between two worktable assemblies. When the polishing tool moves to its upper side, the spray cleaner sprays polishing liquid onto the polishing part of the polishing tool to remove the debris attached to the polishing surface of the polishing tool. The spray assembly is located on the side wall of the outer tank near the drive housing structure. It is used to spray polishing liquid onto the top of the multiple worktable assemblies.

[0009] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0010] In one alternative: the outer tank is provided with a belt drive assembly, which includes a pulley section, a drive shaft and a drive belt. There are multiple pulley sections, which are respectively located on the drive shaft and each worktable assembly. The drive belt passes around the outside of each pulley section and drives and engages with it. The drive shaft is located on the bottom wall of the pulley section, and one end of it is connected to the drive box at the bottom of the outer tank.

[0011] In one alternative embodiment: the workbench assembly includes a hollow mounting platform, a support ring, a negative pressure suction unit, and a lower platform. The lower platform is disposed on the bottom wall of the outer tank as a base, and a middle cylinder is disposed on it. The hollow mounting platform is fixed to the top of the middle cylinder. A negative pressure suction unit is disposed on the outer wall of the hollow mounting platform. The negative pressure suction unit draws air from inside the hollow mounting platform to create negative pressure inside it. The top of the hollow mounting platform is open and is provided with a support ring.

[0012] In one alternative: the support ring is a flexible rubber ring with a rubber flange on its edge, the support ring has a conical structure, and the rubber flange is fastened to the flange on the mounting hollow platform port by screws.

[0013] In one alternative: the negative pressure suction unit includes an annular air passage and a negative pressure pump located inside the middle cylinder. The annular air passage surrounds the outer wall of the mounting hollow platform and has multiple suction heads. The annular air passage is connected to the negative pressure pump through a connecting air passage.

[0014] In one alternative: the worktable assembly further includes an ejector feeding unit, which includes an ejector cylinder and an ejector plate. The ejector cylinder is located inside the middle cylinder, and its telescopic end is provided with a lower connecting plate. The ejector plate is located inside the mounting hollow platform, and it is connected to the lower connecting plate by multiple connecting guide posts. The surface of the ejector plate facing the port of the mounting hollow platform has a rubber layer.

[0015] In one alternative: the spraying assembly includes a liquid tank and multiple spray nozzles. The liquid tank is located inside the drive housing structure and has a liquid pump inside. The multiple spray nozzles are respectively located on the side wall of the outer tank, with their liquid outlets tilted toward the top of each workbench assembly. Each spray nozzle is connected to the liquid pump through a liquid injection pipe, and a flow meter is installed on the liquid injection pipe.

[0016] In one alternative embodiment: the drive housing structure includes a housing section and a power assembly. The housing section has multiple guide slots on its side wall facing the outer groove. The guide slots correspond to the polishing tool. The polishing tool includes a polishing swing arm and a polishing disc. The polishing swing arm passes through the guide slots, and one end of it is connected to the power assembly. The polishing disc is located at the end of the polishing swing arm that points towards the worktable assembly. It is used to polish optical glass workpieces through swinging motion.

[0017] In one alternative embodiment: the power assembly includes a power unit, a main frame, and a movable rod. The main frame is disposed inside the housing along the length of the outer groove. The movable rod is parallel to the main frame and its two ends are slidably connected to the main frame. The power unit is connected to the movable rod and is used to drive it to reciprocate along its own length. A central column is disposed in the middle of the polishing swing arm, and the central column is rotatably engaged with the main frame. The tail of the polishing swing arm has a swing groove. Multiple swing deflectors are disposed on the movable rod, and the multiple swing deflectors extend into the swing grooves respectively. The power unit includes an active motor, a swing disk, and an active strip frame. The active motor is fixed inside the housing. The swing disk is disposed at the output end of the active motor, and its end face is provided with an eccentric column. The active strip frame is disposed opposite to the swing disk and is fixedly connected to the movable rod.

[0018] In one alternative: each guide slot is provided with a contact slot near its end, and an electric contact block is provided inside the contact slot. The electric contact block is electrically connected to the jet cleaner. When the polishing swing arm swings to the end of the guide slot, the polishing swing arm contacts the electric contact block and the electric contact block generates an electrical signal.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects:

[0020] This invention drives a polishing tool to perform intermittent, oscillating polishing via a drive housing structure, rather than continuous contact with the workpiece. This creates a natural "online cleaning window" during the period when the polishing tool swings back from the workpiece and moves above the spray cleaner. The spray cleaner can then powerfully rinse the polishing surface of the polishing tool during this interval, instantly removing any adhering abrasive particles. This ensures the polishing tool is clean with each contact with the workpiece, fundamentally preventing particle accumulation and repeated scratches, and significantly improving polishing accuracy and final surface finish. This invention constructs a dual-spray cleaning system at both the workpiece and tool ends. On one hand, the spray assembly directly sprays polishing fluid onto the workpiece surface, promptly washing away most of the particles and heat generated at the polishing interface. On the other hand, the polishing tool undergoes secondary, targeted cleaning by the spray cleaner during its swing-back process. This dual mechanism significantly enhances the efficiency of particle removal, completely resolving surface defects caused by particle retention. The device employs a periodic reciprocating motion of the polishing tool. When the polishing tool swings to its limit of misalignment with the outer tank, a non-interference loading and unloading space is created between it and the worktable assembly, facilitating the installation and removal of optical glass workpieces by operators. Simultaneously, this intermittent processing method facilitates observation and inspection during the processing, and the structural design combines the advantages of high-efficiency production with user-friendly operation. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a high-precision grinding and polishing device for optical glass in one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the installation structure of the polishing tool and drive housing in one embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the workbench assembly structure in one embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the hollow mounting platform in one embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the ejector feeding unit structure in one embodiment of the present invention.

[0027] Figure 6This is a schematic diagram of the spray assembly structure in one embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the internal structure of the drive housing in one embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the power unit structure in one embodiment of the present invention.

[0030] Figure reference numerals: Outer tank 100, worktable assembly 200, hollow mounting platform 210, support ring 220, negative pressure suction unit 230, annular air passage 231, connecting air passage 232, suction end 233, lower platform 240, middle cylinder 250, ejection and unloading unit 260, lower connecting plate 261, ejection cylinder 262, ejection plate 263, connecting guide post 264, belt drive assembly 300, pulley section 310, drive shaft 320, drive belt 330, polishing tool 400, polishing swing arm 410, Polishing disc 420, Central column 430, Swing slot 440, Drive housing structure 500, Housing part 510, Power unit 520, Active motor 521, Swing disc 522, Active strip frame 523, Eccentric column 524, Guide slot 530, Contact slot 540, Electric contact block 550, Main frame 560, Movable rod 570, Swing lever 580, Spray assembly 600, Liquid tank 610, Spray nozzle 620, Injection pipe 630, Flow meter 640, Spray cleaner 700. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0033] In one embodiment, such as Figures 1-3As shown, a high-precision grinding and polishing device for optical glass includes an outer tank 100, a worktable assembly 200, a belt drive assembly 300, a drive housing structure 500, and a jetting assembly 600. Multiple worktable assemblies 200 are evenly spaced inside the outer tank 100. Optical glass workpieces are mounted on the top surface of each worktable assembly 200 via negative pressure suction, allowing them to rotate around their center. The belt drive assembly 300 is connected to all worktable assemblies 200, driving them to rotate synchronously. The drive housing structure 500 is located on the side of the outer tank 100 and has multiple polishing tools 400 mounted on it. One end of each polishing tool 400 extends to the upper surface of the worktable assembly 200 and polishes the workpiece. The optical glass workpiece on top of the worktable assembly 200 is polished. The drive housing structure 500 is used to drive multiple polishing tools 400 to move synchronously. The polishing tools 400 reciprocate in contact with the optical glass workpiece in an oscillating manner. Multiple spray cleaners 700 are also provided inside the outer tank 100. The spray cleaners 700 are located between the two worktable assemblies 200. When the polishing tool 400 moves to its upper side, the spray cleaners 700 spray polishing liquid onto the polishing part of the polishing tool 400 to remove the debris attached to the polishing surface of the polishing tool 400. The spray assembly 600 is located on the side wall of the outer tank 100 near the drive housing structure 500. It is used to spray polishing liquid onto the top of the multiple worktable assemblies 200.

[0034] In this embodiment of the invention, in the initial state, the end of the polishing tool 400 away from the drive housing structure 500 is misaligned with the outer tank 100. The operator installs the optical glass workpiece onto the top of the multiple worktable assemblies 200, with the upper surface of the optical glass workpiece higher than the top of the worktable assembly 200. During polishing, both the drive housing structure 500 and the spray assembly 600 work synchronously. The drive housing structure 500 drives the multiple polishing tools 400 to swing synchronously. The polishing tools 400 intermittently reciprocate over the upper surface of the optical glass workpiece on top of the worktable assembly 200, while the worktable assembly 200 synchronously maintains a rotating state, thereby sequentially polishing the optical glass workpiece. The spray assembly 600... The polishing fluid is sprayed onto the top of the worktable assembly 200. The polishing fluid carries away the debris generated during the polishing of the optical glass workpiece. The spray cleaner 700 sprays polishing fluid upwards. When the polishing tool 400 swings above the spray cleaner 700, the polishing fluid acts on the polishing part of the polishing tool 400, cleaning the debris on the surface of the polishing part. In the next polishing, the debris can be effectively prevented from affecting the polishing effect. The swinging motion of the polishing tool 400 and the worktable assembly 200 realizes intermittent reciprocating polishing, and the optical glass workpiece is polished in its entirety, providing time for cleaning debris. When the polishing tool 400 and the worktable assembly 200 are misaligned, it is convenient to install and remove the optical glass workpiece.

[0035] In one embodiment, such as Figures 1-4 As shown, the outer tank 100 is internally provided with a belt drive assembly 300, which includes a pulley portion 310, a drive shaft 320, and a drive belt 330. Multiple pulley portions 310 are respectively located on the drive shaft 320 and each worktable assembly 200. The drive belt 330 passes around the outside of each pulley portion 310 and engages with it for transmission. The drive shaft 320 is located on the bottom wall of the pulley portion 310, with one end connected to a drive box at the bottom of the outer tank 100. In this embodiment, the drive box uses existing technology to drive the drive shaft 320 to rotate. The motion of the drive belt 330 and pulley portions 310 is then transmitted, allowing multiple worktable assemblies 200 to rotate simultaneously around their own center. The optical glass workpiece follows this rotation, and in conjunction with the oscillation of the polishing tool 400, thorough grinding and polishing are achieved.

[0036] In one embodiment, such as Figures 1-4 As shown, the workbench assembly 200 includes a hollow mounting platform 210, a support ring 220, a negative pressure suction unit 230, and a lower platform 240. The lower platform 240 is disposed on the bottom wall of the outer groove 100 as a base, and a middle cylinder 250 is disposed on it. The hollow mounting platform 210 is fixed to the top of the middle cylinder 250. The negative pressure suction unit 230 is disposed on the outer wall of the hollow mounting platform 210. The negative pressure suction unit 230 draws air from inside the hollow mounting platform 210 to generate negative pressure inside it. The top of the hollow mounting platform 210 is open and is provided with a support ring 220. In this embodiment of the invention, the optical glass workpiece is mounted at the port of the hollow mounting platform 210 through the support ring 220. The negative pressure suction unit 230 works to draw air from inside the hollow mounting platform 210 to generate negative pressure inside it, thus securing the optical glass workpiece.

[0037] In one embodiment, such as Figures 1-4 As shown, the support ring 220 is a flexible rubber ring with a rubber flange on its edge. The support ring 220 has a conical structure, and the rubber flange is fastened to the flange installed on the port of the hollow platform 210 by screws. In this embodiment of the invention, the edge of the optical glass workpiece is flexibly supported, and the inner surface of the conical support ring 220 is in full and sealed contact with the edge of the optical glass workpiece, and is adapted to the diameter of the optical glass workpiece. The rubber flange allows for the disassembly and replacement of the support ring 220.

[0038] In one embodiment, such as Figures 1-4As shown, the negative pressure suction unit 230 includes an annular air passage 231 and a negative pressure pump located inside the middle cylinder 250. The annular air passage 231 surrounds the outer wall of the mounting hollow platform 210 and is provided with multiple suction heads 233. The annular air passage 231 is connected to the negative pressure pump through a connecting air passage 232. In this embodiment of the invention, the negative pressure pump draws gas from inside the mounting hollow platform 210 through the connecting air passage 232, the annular air passage 231, and the suction heads 233, creating a negative pressure state inside the mounting hollow platform 210. The mounting hollow platform 210 in the negative pressure state can firmly adsorb the optical glass workpiece, ensuring the stability of the optical glass workpiece during polishing.

[0039] In one embodiment, such as Figures 1-5 As shown, the worktable assembly 200 further includes an ejector unloading unit 260, which includes an ejector cylinder 262 and an ejector plate 263. The ejector cylinder 262 is located inside the middle cylinder 250, and its telescopic end is provided with a lower connecting plate 261. The ejector plate 263 is located inside the mounting hollow platform 210, and it is connected to the lower connecting plate 261 by multiple connecting guide posts 264. The surface of the ejector plate 263 facing the port of the mounting hollow platform 210 has a rubber layer. In this embodiment of the invention, after polishing is completed, the negative pressure suction unit 230 releases the negative pressure state on the mounting hollow platform 210, the ejector cylinder 262 extends and pushes the ejector plate 263 through the lower connecting plate 261 and the connecting guide posts 264. The ejector plate 263 moves towards the port of the mounting hollow platform 210, and the ejector plate 263 pushes the optical glass workpiece so that the optical glass workpiece can be quickly removed from the mounting hollow platform 210, reducing the difficulty of unloading.

[0040] In one embodiment, such as Figures 1-6 As shown, the spraying assembly 600 includes a liquid tank 610 and multiple spray nozzles 620. The liquid tank 610 is located inside the drive housing structure 500 and contains a liquid pump. The multiple spray nozzles 620 are respectively located on the side wall of the outer tank 100, with their liquid outlets tilted towards the top of each worktable assembly 200. Each spray nozzle 620 is connected to the liquid pump through a liquid injection pipe 630, and a flow meter 640 is installed on the liquid injection pipe 630. In this embodiment of the invention, the liquid tank 610 stores polishing liquid and is connected to the outer tank 100 through a polishing liquid recovery system. The polishing liquid recovery system recovers the polishing liquid and imports it into the liquid tank 610. The liquid pump injects the polishing liquid into the spray nozzles 620 through the liquid injection pipe 630, and the spray nozzles 620 spray the polishing liquid onto the optical glass workpiece to remove debris from the surface of the optical glass workpiece.

[0041] In one embodiment, such as Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the drive housing structure 500 includes a housing part 510 and a power assembly. The housing part 510 has multiple guide slots 530 on its side wall facing the outer groove 100. The guide slots 530 correspond to the polishing tool 400. The polishing tool 400 includes a polishing swing arm 410 and a polishing disc 420. The polishing swing arm 410 passes through the guide slots 530, and one end of it is connected to the power assembly. The polishing disc 420 is located at the end of the polishing swing arm 410 that points towards the worktable assembly 200. It is used to polish the optical glass workpiece by swinging motion. In this embodiment of the invention, the power assembly acts on the ends of the multiple polishing swing arms 410 that extend into the housing part 510. The polishing swing arms 410 swing motion and the polishing disc 420 moves with the polishing swing arms 410, so that the polishing disc 420 reciprocates over the optical glass workpiece and grinds and polishes it.

[0042] In one embodiment, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the power assembly includes a power unit 520, a main frame 560, and a movable rod 570. The main frame 560 is arranged inside the housing 510 along the length of the outer groove 100. The movable rod 570 is parallel to the main frame 560, and its two ends are slidably connected to the main frame 560. The power unit 520 is connected to the movable rod 570 and is used to drive it to reciprocate along its own length. A central column 430 is provided in the middle of the polishing swing arm 410. The central column 430 is rotatably engaged with the main frame 560. The tail of the polishing swing arm 410 has a swing groove 440. Multiple swing deflectors 580 are provided on the movable rod 570, and the multiple swing deflectors 580 extend into the swing grooves 440 respectively. The power unit 520 includes an active motor 521, a swing disk 522, and a main... The active strip frame 523 is constructed with the active motor 521 fixed inside the housing 510. The swing disk 522 is located at the output end of the active motor 521, and an eccentric column 524 is provided on its end face. The active strip frame 523 is positioned relative to the swing disk 522 and is fixedly connected to the movable rod 570. In this embodiment of the invention, the active motor 521 drives the swing disk 522 to rotate, and the eccentric column 524 follows the rotation of the swing disk 522, acting on the active strip frame 523. Driven by the eccentric column 524, the active strip frame 523 and the movable rod 570 reciprocate along the main frame 560. The movable rod 570 acts on the tail of each polishing swing arm 410 through multiple swing deflectors 580, causing it to swing around the central column 430. Consequently, the polishing disk 420 follows the swing arm 410 and acts on the optical glass workpiece.

[0043] In one embodiment, such as Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, each guide slot 530 is provided with a contact slot 540 near its end. An electric contact block 550 is provided inside the contact slot 540. The electric contact block 550 is electrically connected to the spray cleaner 700. When the polishing swing arm 410 swings to the end of the guide slot 530, the polishing swing arm 410 contacts the electric contact block 550 and the electric contact block 550 generates an electrical signal. In this embodiment of the invention, the spray cleaner 700 is in a stopped working state in the initial state. When the electric contact block 550 contacts the polishing swing arm 410, an electrical signal is generated, and the spray cleaner 700 automatically starts and sprays the polishing liquid in the outer tank 100 upward. At this time, the polishing disc 420 is directly above the spray cleaner 700, and the cleaning liquid acts on the polishing surface of the polishing disc 420 to clean the particles on the polishing surface.

[0044] The above embodiments provide a high-precision grinding and polishing device for optical glass, the working principle of which is as follows:

[0045] 1. Initial state and workpiece loading

[0046] In the initial state, the polishing discs 420 of the multiple polishing tools 400 driven by the drive housing structure 500 swing away from the worktable assembly 200 with the polishing swing arm 410, and their ends are misaligned with the side wall of the outer tank 100, so as to make enough operating space for loading the workpiece.

[0047] The operator places the optical glass workpieces to be processed sequentially onto the support rings 220 on top of each worktable assembly 200. The support rings 220 are made of flexible rubber and designed with a conical structure, allowing their inner surfaces to form a sufficient seal with the edges of optical glass workpieces of different diameters. Subsequently, the negative pressure suction unit 230 is activated: the negative pressure pump located inside the middle cylinder 250 begins operation, drawing air from the internal cavity of the hollow mounting platform 210 through the connecting air passage 232, the annular air passage 231 surrounding the outer wall of the hollow mounting platform 210, and multiple suction nozzles 233. A stable negative pressure state is formed within the cavity, thereby firmly adsorbing the optical glass workpiece onto the port of the hollow mounting platform 210. This flexible support combined with negative pressure adsorption effectively fixes the workpiece while avoiding stress deformation or surface damage that may be caused by rigid clamping.

[0048] 2. Multi-dimensional synchronous polishing motion

[0049] After loading is complete, the polishing program is started. At this time, the workpiece rotation subsystem, the tool oscillation subsystem, and the polishing fluid supply subsystem work together to remove material in three-dimensional space.

[0050] Workpiece rotation drive: The drive box (not labeled, belonging to the prior art) at the bottom of the outer tank 100 drives the drive shaft 320 of the belt drive assembly 300 to rotate. The drive shaft 320 transmits power synchronously to the pulleys 310 on the lower platform 240 of each worktable assembly 200 via the drive belt 330 through the pulleys 310 mounted on it. Since the drive belt 330 maintains a transmission engagement with all pulleys 310, all worktable assemblies 200 (i.e., the optical glass workpieces mounted on them) can achieve high-precision synchronous uniform rotation around their own central axis. This rotational motion ensures that the entire surface of the workpiece can be uniformly processed by the subsequent polishing tool 400, avoiding local over- or under-polishing.

[0051] Tool oscillating polishing: Simultaneously, the power component inside the drive housing structure 500 drives all polishing tools 400 to perform synchronous, reciprocating oscillating motion. Specifically, the active motor 521 drives the oscillating disk 522 at its output end to rotate, and the eccentric column 524 fixed to the end face of the oscillating disk 522 subsequently performs circular motion. This eccentric column 524 is embedded within the active strip frame 523. When the eccentric column 524 moves, it drives the active strip frame 523, along with the movable rod 570 fixed to it, to perform high-frequency reciprocating linear motion along the length of the main frame 560.

[0052] Multiple swing pins 580 are fixed on the movable rod 570, each swing pin 580 extending into the swing slot 440 at the tail of the corresponding polishing swing arm 410. When the movable rod 570 moves back and forth, the swing pins 580 actuate the sidewalls of the swing slots 440, forcing the polishing swing arm 410 to swing back and forth around the central post 430 in its middle. This swinging motion causes the polishing disc 420 located at the end of the polishing swing arm 410 to intermittently pass over the upper surface of the optical glass workpiece below, which is also rotating, in an arc trajectory, thereby completing the grinding and polishing of the workpiece.

[0053] Polishing slurry supply and chip removal: During polishing, the spray assembly 600 operates continuously. The polishing slurry in the tank 610 is pressurized by a pump and delivered through the injection pipe 630 to multiple spray nozzles 620 located on the side wall of the outer tank 100. A flow meter 640 on the injection pipe 630 is used to monitor and control the flow rate of the polishing slurry in real time. Each spray nozzle 620 sprays polishing slurry at a certain angle onto the upper surface of the rotating workpiece. This design achieves at least three objectives: first, it serves as a polishing medium to assist the polishing disc 420 in material removal; second, it utilizes the impact force of the liquid flow to promptly flush away glass fragments ground from the workpiece surface, preventing their accumulation in the processing area and causing scratches (i.e., "secondary scratches"); and third, it removes the heat generated by polishing friction, stabilizing the temperature of the processing area and preventing workpiece deformation due to thermal stress.

[0054] 3. Online tool self-cleaning mechanism (deep expansion point)

[0055] A key innovation of this device lies in its integrated online self-cleaning function for polishing tools, which effectively solves the critical technical problem of reduced polishing accuracy caused by debris adhering to the tool surface (polishing disc 420) in traditional polishing processes.

[0056] Inside the outer tank 100, a jet cleaner 700 is provided between every two adjacent worktable assemblies 200. This jet cleaner 700 is electrically connected to an electric actuating block 550 on the drive housing structure 500. Its operating logic is as follows:

[0057] As the polishing swing arm 410, carrying the polishing disc 420, completes polishing from above a workpiece and swings towards the side wall of the outer tank 100 (i.e., in the direction of the jet cleaner 700), the polishing swing arm 410 moves to the end of the guide slot 530. At this time, the side wall of the polishing swing arm 410 makes physical contact with the electric actuating block 550 disposed inside the contact slot 540. This contact triggers an electrical signal, which is transmitted to the corresponding jet cleaner 700 in real time.

[0058] Upon receiving the signal, the jet cleaner 700 instantly activates, spraying high-pressure polishing fluid upwards. At this moment, the polishing disc 420 is positioned directly above the jet cleaner 700. The high-speed flow of polishing fluid powerfully washes the polishing surface of the polishing disc 420, thoroughly cleaning away contaminants such as glass fragments and abrasive powder that remained in the micropores or textures of the surface from the previous polishing cycle.

[0059] This "oscillation to limit position - trigger contact - high-pressure cleaning" linkage mechanism ensures that the working surface of the polishing disc 420 remains clean before entering the next polishing stroke. This fundamentally avoids scratching the workpiece surface by hard particles adhering to the tool, significantly improves the surface finish after polishing (reducing the surface roughness Ra value), and guarantees the consistency of processing quality for all workpieces within a batch. Simultaneously, since the cleaning action is completed during the oscillation interval, it does not occupy additional auxiliary time, ensuring the continuous production efficiency of the device.

[0060] 4. Workpiece unloading and cycling

[0061] Once the preset polishing cycle is completed, all moving parts automatically stop. The negative pressure pump of the negative pressure suction unit 230 is turned off, and atmospheric air is introduced into the hollow mounting platform 210 through the connecting air passage 232, the annular air passage 231, and the suction end 233 to release the negative pressure state.

[0062] Subsequently, the ejector unloading unit 260 is activated: the ejector cylinder 262, located inside the middle cylinder 250, extends, driving the lower connecting plate 261 at its telescopic end to move upward. The lower connecting plate 261 pushes the ejector plate 263, located inside the mounting hollow platform 210, through multiple connecting guide posts 264. The ejector plate 263, with a rubber layer on its surface, rises upward, smoothly lifting the processed optical glass workpiece from the support ring 220, separating it from the port of the mounting hollow platform 210. This greatly facilitates the unloading operation for the operator and avoids difficulties in manual prying or workpiece damage caused by excessively tight negative pressure adsorption.

[0063] At this point, a complete processing cycle is finished, and the device can proceed to the loading and processing of the next batch of workpieces.

[0064] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A high-precision grinding and polishing device for optical glass, comprising an outer tank body, a workbench assembly, a belt drive assembly, a drive box structure and a spraying assembly, characterized in that, The worktable assembly consists of multiple worktable components arranged at equal intervals inside the outer groove. The optical glass workpiece is mounted on the top surface of the worktable assembly by negative pressure suction and can rotate around its own center. The belt drive assembly is connected to multiple worktable assemblies and is used to drive the multiple worktable assemblies to rotate synchronously; the drive housing structure is located on the side of the outer tank and is equipped with multiple polishing tools. One end of each polishing tool extends to the upper surface of the worktable assembly and polishes the optical glass workpiece located on top of the worktable assembly. The drive housing structure is used to drive the multiple polishing tools to move synchronously, and the polishing tools reciprocate in contact with the optical glass workpiece in a swinging manner. The outer tank is also equipped with multiple spray cleaners, which are located between the two worktable assemblies. When the polishing tool moves to its upper side, the spray cleaner sprays polishing liquid onto the polishing part of the polishing tool to remove the debris adhering to the polishing surface of the polishing tool. The spraying assembly is located on the side wall of the outer tank near the drive housing structure, and is used to spray polishing liquid onto the top of multiple worktable assemblies.

2. The optical glass high-precision lapping and polishing apparatus according to claim 1, wherein The outer tank is equipped with a belt drive assembly, which includes a pulley section, a drive shaft, and a drive belt. There are multiple pulley sections, which are respectively located on the drive shaft and each worktable assembly. The drive belt passes around the outside of each pulley section and drives and engages with it. The drive shaft is located on the bottom wall of the pulley section, and one end of it is connected to the drive box at the bottom of the outer tank.

3. The optical glass high-precision lapping and polishing apparatus according to claim 1, wherein The workbench assembly includes a hollow mounting platform, a support ring, a negative pressure suction unit, and a lower platform base; The lower platform is set on the bottom wall of the outer tank as a base, and a middle cylinder is set on it. The hollow mounting platform is fixed on the top of the middle cylinder. A negative pressure suction unit is set on the outer wall of the hollow mounting platform. The negative pressure suction unit draws air from the inside of the hollow mounting platform to create negative pressure inside it. The top of the hollow mounting platform is open and is equipped with a support ring.

4. The optical glass high-precision lapping and polishing apparatus according to claim 3, wherein The support ring is a flexible rubber ring with a rubber flange on its edge. The support ring has a conical structure, and the rubber flange is fastened to the flange on the mounting hollow platform port by screws.

5. The optical glass high-precision lapping and polishing apparatus according to claim 3, wherein The negative pressure suction unit includes an annular air passage and a negative pressure pump located inside the middle cylinder. The annular air passage surrounds the outer wall of the mounting hollow platform and has multiple suction heads. The annular air passage is connected to the negative pressure pump through a connecting air passage.

6. The optical glass high-precision lapping and polishing apparatus according to claim 5, wherein The workbench assembly also includes an ejector feeding unit, which includes an ejector cylinder and an ejector plate. The ejector cylinder is located inside the middle cylinder, and its telescopic end is provided with a lower connecting plate. The ejector plate is located inside the hollow mounting platform, and it is connected to the lower connecting plate by multiple connecting guide posts. The surface of the ejector plate facing the port of the hollow mounting platform has a rubber layer.

7. The optical glass high-precision lapping and polishing apparatus according to claim 1, wherein The spraying assembly includes a liquid tank and multiple spray nozzles; The liquid tank is located inside the drive housing structure and contains a liquid pump. Multiple injection heads are respectively located on the side wall of the outer tank, with their liquid outlets tilted toward the top of each workbench assembly. Each injection head is connected to the liquid pump through an injection pipe, and a flow meter is installed on the injection pipe.

8. The optical glass high-precision lapping and polishing apparatus according to claim 1, wherein The drive housing structure includes a housing section and a power assembly; Multiple guide slots are provided on the side wall of the housing facing the outer tank. The guide slots correspond to the polishing tools. The polishing tools include a polishing swing arm and a polishing disc. The polishing swing arm passes through the guide slots and one end is connected to the power assembly. The polishing disc is located at the end of the polishing swing arm that points towards the worktable assembly. It is used to polish optical glass workpieces by swinging motion.

9. The optical glass high-precision lapping and polishing apparatus according to claim 8, wherein The power assembly includes a power unit, a main frame, and a movable rod; The main frame is set inside the box body along the length of the outer groove. The movable rod is parallel to the main frame and its two ends are slidably connected to the main frame. The power unit is connected to the movable rod and is used to drive it to move back and forth along its own length. A central column is set in the middle of the polishing swing arm. The central column is rotatably engaged with the main frame. The tail of the polishing swing arm has a swing groove. The movable rod is equipped with multiple swing pins, which extend into the swing slots respectively. The power unit includes an active motor, a swing disk, and an active bar frame. The active motor is fixed inside the housing, the swing disk is located at the output end of the active motor, and an eccentric column is provided on its end face. The active bar frame is positioned relative to the swing disk and is fixedly connected to the movable rod.

10. The high-precision grinding and polishing apparatus for optical glass according to claim 9, characterized in that, Each guide slot has a contact slot near its end. Inside the contact slot is an electric actuating block, which is electrically connected to the jet cleaner. When the polishing swing arm swings to the end of the guide slot, the polishing swing arm contacts the electric actuating block and the electric actuating block generates an electrical signal.

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