Automatic numerical control machining device special for optical lens

Abstract

The utility model relates to the technical field of lens machining, in particular to an automatic numerical control machining device special for optical lenses. A numerical control machining device special for an automatic optical lens comprises a rack, a lens clamping mechanism capable of moving front and back is installed on a working table on the surface of the rack and can horizontally rotate around a shaft, a vertical plate is installed on the rack, a cutting main shaft capable of vertically moving is installed on one side of the vertical plate, and the cutting main shaft is installed on the other side of the vertical plate. And a tool magazine capable of horizontally moving is mounted on the vertical plate on one side of the cutting main shaft. The automatic numerical control machining device special for the optical lens comprises a rack, a lens clamping mechanism capable of moving front and back is installed on a working table plate of the automatic numerical control machining device, and horizontal rotation is achieved through a first rotating air cylinder; a rotating shaft of the first rotating cylinder fixes a supporting seat, a rotating motor is mounted in the first rotating cylinder, a rotating pressing cylinder is fixed on the side part of the first rotating cylinder, and the rotating pressing cylinder presses a lens on a lens supporting seat at the shaft end of the rotating motor through a pressing head; all the components cooperate to complete lens positioning, clamping and machining.

Description

Technical Field

[0001] This utility model relates to the field of lens processing technology, and in particular to an automated CNC machining device for optical lenses. Background Technology

[0002] The market and customers are increasingly demanding higher quality optical and optometry lenses. The growth of AR / VR optoelectronic products and smart glasses driven by 5G and IoT technologies is also growing. Consumers are increasingly opting for uniquely designed glasses that match their personal style, leading to a growing demand for personalized lenses (such as retro, sports, smart glasses, and custom lenses). Therefore, traditional eyeglass fitting equipment is no longer sufficient to meet the current technological requirements of optometry products. In the precision manufacturing process of lenses, subsequent precision milling, drilling, polishing, and grooving based on different frame and customization data are essential processes. Precision CNC edge-cutting machines integrate previously required manufacturing processes while reducing reliance on manual labor, improving yield rates, and enabling rapid response to market demands. They are particularly suitable for the technology-intensive and high-value-added functional lens manufacturing industry. With the development of intelligent technologies (such as AI process optimization and digital twins), their advantages will be further expanded.

[0003] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create an automated CNC machining device for optical lenses, making it more valuable for industrial applications. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an automated CNC machining device for optical lenses.

[0005] This utility model discloses an automated CNC machining device for optical lenses, including a frame, a lens clamping mechanism that can move back and forth on a worktable on the surface of the frame, the lens clamping mechanism can rotate horizontally around an axis, a vertical plate is installed on the frame, a vertically movable cutting spindle is installed on one side of the plate, and a horizontally movable tool magazine is installed on the plate on one side of the cutting spindle.

[0006] The lens clamping mechanism includes a transverse slide electric push rod fixedly mounted to the worktable. A harmonic reducer is mounted on the slider of the transverse slide electric push rod. A servo motor is fixed on the rotating shaft of the harmonic reducer. A rotary clamping cylinder is fixed on one side of the servo motor. The rotary clamping cylinder clamps the lens onto the lens support seat at the upper end of the servo motor's rotating shaft. The end of the pressure rod of the rotary clamping cylinder is a pressure head that is movably mounted via a shaft.

[0007] This automated CNC machining device for optical lenses includes a frame with a lens clamping mechanism that can move back and forth on its worktable. This mechanism drives the slider to move back and forth via an electric push rod on a transverse slide and achieves horizontal rotation using a harmonic reducer. A servo motor is fixed to the rotating shaft of the harmonic reducer, and a rotary clamping cylinder is fixed to its side. The rotary clamping cylinder presses the lens against a lens support seat at the end of the servo motor shaft through a pressure head. A vertically movable cutting spindle is installed on one side of the vertical plate of the frame, and a horizontally movable tool magazine is set on the other side. All components work together to complete the positioning, clamping, and machining of the lens.

[0008] Furthermore, an electric push rod for driving the cutting spindle is fixed on the vertical plate. A rotating spindle is fixed on the slider of the electric push rod, and the lower end of the rotating spindle can hold various cutting tools.

[0009] An electric push rod with a lifting slide is fixed on the upright plate. The electric push rod drives the rotary spindle to move vertically through a slider. The lower end of the rotary spindle can hold a variety of cutting tools. The machining height of the cutting spindle can be adjusted by the lifting and lowering movement of the electric push rod with the lifting slide.

[0010] Furthermore, on the upright plate, to the left of the electric push rod of the lifting slide, there is an adapter frame. A slide cylinder is installed on the fixed plate at the front end of the adapter frame. A transverse frame is installed on the slider of the slide cylinder, and a tool magazine is installed on the transverse frame.

[0011] A transfer frame is located next to the electric push rod of the lifting slide on the left side of the upright plate. A slide cylinder is installed on the fixed plate at the front end of the frame. The slider of the slide cylinder is connected to the tool magazine through the transverse frame. The horizontal movement of the slide cylinder drives the transverse frame and the tool magazine to move laterally.

[0012] Furthermore, slide rails are installed on both sides of the slide cylinder on the fixed plate, and sliders that cooperate with the slide cylinder are located on the inner side of the transverse frame.

[0013] The slide rails on both sides of the fixed plate are installed parallel to the slide cylinder. The slider on the inner side of the transverse frame is linked with the slide cylinder. The slide cylinder drives the slider to slide laterally along the slide rail, thereby driving the transverse frame to achieve stable translation.

[0014] Furthermore, the tool magazine includes a tool magazine rotary motor mounted on a fixed plate. A circular rotating plate is mounted on the rotating shaft of the tool magazine rotary motor. Multiple tool clamping cylinders are evenly arranged on the outer ring below the rotating plate. Each tool clamping cylinder clamps a tool in its clamping jaws.

[0015] The tool magazine includes a tool magazine rotary motor on a fixed plate. A circular rotating plate is mounted on the rotating shaft of the tool magazine rotary motor. Multiple tool clamping cylinders are evenly arranged on the outer ring below the rotating plate. Each tool clamping cylinder's clamping jaws hold a tool. The rotating plate is rotated by the tool magazine rotary motor to switch tools.

[0016] Furthermore, the clamping jaws of the tool clamping cylinder have an arc-shaped groove on the inside, and the arc shape of the groove matches the tool shank.

[0017] The clamping jaws of the tool clamping cylinder have an arc-shaped groove on the inner side. The arc shape of the groove matches the contour of the tool shank, and stable clamping is achieved by the fit between the groove and the tool shank.

[0018] By means of the above-described solution, the present invention has at least the following advantages:

[0019] 1. The overall structure of this utility model is simple and efficient, with high precision, automation and flexible production capabilities. Transmission, positioning and operation are all completed with the assistance of cylinders, lead screws, slide rails and motors. Therefore, the number of parts to be processed is relatively small, the dimensional accuracy of the parts is easy to guarantee, and the structure of the parts to be processed is relatively simple. The precision requirements can be widely accepted by the current precision machining industry, and the manufacturing, installation and after-sales maintenance costs are relatively low.

[0020] 2. This utility model's tool magazine enables free tool changing and four-axis linkage. Figure 1 The system features rotation along the X-axis, spindle downward movement along the Z-axis, forward and backward feeding along the Y-axis, and rotation of the lens axis driven by a rotary motor. It utilizes an 80,000 RPM high-speed precision spindle, integrating multiple processing functions such as milling, drilling, edge grinding and polishing, and grooving. This improves processing efficiency, enables rough and fine milling in one step, saves costs, and enhances lens processing efficiency and quality.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a utility model Figure 1 Enlarged view of region A in the middle;

[0025] Figure 3 This is the front view of this utility model;

[0026] Figure 4 This is a utility model Figure 3 Enlarged view of region B in the middle;

[0027] In the diagram: 1. Frame, 2. Vertical plate, 3. Electric push rod for horizontal sliding table, 4. Harmonic reducer, 5. Servo motor, 7. Rotary clamping cylinder, 8. Pressure head, 9. Electric push rod for lifting sliding table, 10. Rotary spindle, 11. Sliding table cylinder, 12. Horizontal frame, 13. Adapter frame, 14. Fixed plate, 15. Tool magazine rotary motor, 16. Rotating plate, 17. Tool clamping cylinder. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] See Figure 1 and Figure 2 This automated CNC machining device for optical lenses uses a transverse slide electric push rod 3 on the worktable of the frame 1 to drive the lens clamping mechanism to move back and forth. At the same time, a harmonic reducer 4 drives a servo motor 5 to rotate horizontally around an axis, achieving multi-angle positioning of the lens. The servo motor 5 drives the lens support to rotate at a constant speed through a rotating shaft, and the pressure head 8 of the rotary clamping cylinder 7 flexibly clamps the lens to ensure that the lens does not shift during processing. The cutting spindle on the vertical plate 2 moves vertically for precision cutting, and the tool magazine moves horizontally to quickly switch tools. The coordinated control of the slide electric push rod and the rotary cylinder achieves fully automatic high-precision machining. Multi-axis linkage improves machining efficiency, flexible clamping reduces lens damage, the electric push rod and cylinder work together to ensure positioning accuracy, and the rotary support and clamping mechanism ensure machining stability. It is suitable for the mass production of optical lenses with complex curved surfaces.

[0030] The harmonic reducer 4 of the lens clamping mechanism drives the servo motor 5 to rotate, so that the lens, which is pressed against the servo motor 5 by the rotary clamping cylinder 7, can be placed vertically, and the end face of the lens can then be processed.

[0031] See Figure 1 and Figure 3 The electric push rod 9 of the lifting slide on the vertical plate 2 drives the rotary spindle 10 to move precisely up and down through the slider. During the cutting process, the rotary spindle 10 rotates at high speed and drives the cutting tool held at the lower end to complete the cutting operation. The tool type can be quickly switched according to the processing requirements. The electric push rod 9 of the lifting slide provides stable vertical precision feed control to ensure the cutting depth accuracy. The high-speed rotation of the rotary spindle 10 and its multi-tool adaptability support the processing of complex optical surfaces. The two work together to achieve efficient and high-precision cutting, while reducing manual intervention and improving the level of automation.

[0032] See Figure 3 and Figure 4 The adapter frame 13 on the left side of the vertical plate 2 supports the slide cylinder 11 through the fixed plate 14 at its front end. The slide cylinder 11 drives the transverse frame 12 to move laterally through horizontal reciprocating motion, which drives the tool magazine on the transverse frame 12 to move precisely along the surface of the vertical plate 2 to the tool changing position or machining avoidance position of the cutting spindle 10. During the cutting process, the slide cylinder 11 retracts to move the tool magazine away from the cutting area to avoid interference. When changing tools, the slide cylinder 11 extends to push the transverse frame 12 and the tool magazine to move horizontally below the spindle. The tool magazine rotary motor 15 and the tool clamping cylinder 17 work together to complete the tool grabbing and release. The slide cylinder 11 provides a fast, low-inertia horizontal displacement response. The rigid connection between the adapter frame 13 and the transverse frame 12 ensures the stability of the tool magazine's movement trajectory. Combined with the space avoidance and precise positioning functions, the tool changing time is significantly shortened and the risk of tool collision is reduced, improving the efficiency of multi-process continuous machining and the safety of the equipment.

[0033] The slide rails on both sides of the fixed plate 14 and the slider on the inner side of the transverse frame 12 form a linear guide structure. When the slide cylinder 11 is driven, the slider slides along the slide rail with low friction, driving the transverse frame 12 and the tool magazine to move horizontally and linearly. The rigid contact surface between the slide rail and the slider eliminates the gap through preload, ensuring smooth movement without lateral deviation. The precise fit between the slide rail and the slider provides high rigidity and anti-eccentric load capacity, reducing the motion resistance and energy loss when the slide cylinder 11 is driven. The symmetrical layout of the slide rail on both sides enhances the lateral stability of the transverse frame 12, avoiding vibration or jamming caused by inertia or load changes during the movement of the tool magazine. Combined with the fast response characteristics of the slide cylinder 11, it achieves efficient and high repeatability horizontal positioning of the tool magazine, ensuring the reliability of the tool switching process and the durability of the equipment during long-term operation.

[0034] The tool magazine drives the rotating plate 16 to rotate around the axis via the tool magazine rotary motor 15, positioning different tools sequentially to the tool changing station. When the cutting spindle 10 needs to change tools, the tool clamping cylinder 17 corresponding to the target tool releases the tool from the clamping jaws, while the spindle clamping mechanism grabs the tool. After the tool change is completed, the clamping jaws re-lock the empty tool position. Combining the circumferential motion of the rotating plate 16 with the independent pneumatic control of the tool clamping cylinder 17, rapid switching and precise positioning of multiple tools are achieved. The advantages are that the servo control and indexing positioning accuracy of the tool magazine rotary motor 15 ensure tool switching efficiency and repeatability consistency, the modular layout of the multi-tool clamping cylinder 17 supports high-density tool storage and parallel tool changing operations, the symmetrical structure of the rotating plate 16 reduces rotational inertia and improves dynamic response speed, and the pneumatic clamping method of the tool clamping cylinder 17 has both high rigidity clamping force and buffering characteristics, preventing tools from loosening during high-speed rotation or vibration, significantly improving the automation level and equipment reliability of multi-process continuous machining.

[0035] The clamping jaws of the tool clamping cylinder 17 are pneumatically driven to cause the inner arc-shaped groove to radially contract or expand. The arc curvature of the groove closely fits the outer contour of the tool shank. When clamping, the inner wall of the groove and the tool shank form a uniform contact stress distribution around the entire circumference. When releasing, the groove expands outward synchronously with the jaws and disengages from the tool.

[0036] The working principle of this utility model is as follows:

[0037] The workflow of this automated optical lens processing device is as follows: After processing starts, the electric push rod 3 of the transverse slide table on the frame 1 drives the lens clamping mechanism to move back and forth. At the same time, the harmonic reducer 4 drives the support seat to rotate horizontally, adjusting the lens spatial angle to the processing position. The rotary clamping cylinder 7 presses the lens onto the support seat of the uniformly rotating servo motor 5 through the flexible pressure head 8. The electric push rod 9 of the lifting slide table on the vertical plate 2 drives the rotating spindle 10 to move vertically downward, and the high-speed rotating cutting tool performs precision cutting on the end face of the lens. When changing tools, the slide cylinder 11 pushes the transverse frame 12 to move horizontally along the slide rail slider guide structure of the adapter frame 13, bringing... The moving tool magazine is precisely moved to below the spindle 10. The tool magazine rotary motor 15 drives the rotary plate 16 to index and position the target tool. The corresponding tool clamping cylinder 17 radially expands the arc groove to release the tool. After the spindle clamping mechanism grabs the tool, the empty tool position is relocked. The slide cylinder 11 resets the tool magazine to avoid the machining area. In the cutting and tool changing process, the rigid guidance of the slide rail slider, the indexing accuracy of the rotary motor and the flexible control of the pneumatic clamping work together to achieve multi-angle positioning of the lens, rapid tool switching and precise control of the cutting depth. Combined with the multi-axis linkage of the electric push rod and the cylinder, it ensures high efficiency, high precision and automated continuity of complex optical surface machining.

[0038] The worktable of this device has a waste discharge trough located at the lens clamping mechanism. The waste discharge trough can be connected to a dust removal device to collect the waste generated during cutting, which is convenient for subsequent centralized processing and ensures a clean working environment for the device.

[0039] This device can also be equipped with static electricity removal equipment, such as ion fans and static electricity removal plates, to remove static electricity generated during the cutting process, prevent waste materials after cutting from adhering to various mechanical parts of the device due to static electricity, and ensure a clean working environment for the device.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automated optical lens dedicated numerical control machining device comprising a frame (1), characterized in that: The rack (1) surface workbench plate is provided with a lens clamping mechanism which can move forward and backward, the lens clamping mechanism can rotate horizontally around the shaft, the rack (1) is provided with a vertical stand plate (2), one side of the stand plate (2) is provided with a cutting main shaft which can move vertically, the stand plate (2) on the side of the cutting main shaft is provided with a tool magazine which can move horizontally; The lens clamping mechanism comprises a horizontal moving sliding table electric push rod (3) which is fixedly installed on the workbench plate, a harmonic reducer (4) is installed on the sliding block of the horizontal moving sliding table electric push rod (3), a servo motor (5) is fixed on the rotating shaft of the harmonic reducer (4), a rotary pressing cylinder (7) is fixed on one side of the servo motor (5), the rotary pressing cylinder (7) presses the lens on the lens support seat on the upper end of the rotating shaft of the servo motor (5), and the pressing rod end of the rotary pressing cylinder (7) is a pressing head (8) which is movably installed through the shaft.

2. The automatic optical lens special purpose NC machining device according to claim 1, characterized in that: The stand plate (2) is fixedly provided with a lifting sliding table electric push rod (9) for driving the cutting main shaft to move, a rotating main shaft (10) is fixed on the sliding block of the lifting sliding table electric push rod (9), and the lower end of the rotating main shaft (10) can clamp various cutting tools.

3. The automatic optical lens special purpose NC machining device according to claim 2, characterized in that: The stand plate (2) is provided with an adapter frame (13) on the left side of the lifting sliding table electric push rod (9), a sliding table cylinder (11) is installed on the fixed plate (14) at the front end of the adapter frame (13), a horizontal moving frame (12) is installed on the sliding block of the sliding table cylinder (11), and the horizontal moving frame (12) is provided with a tool magazine.

4. The automatic optical lens special purpose NC machining device according to claim 3, characterized in that: The fixed plate (14) is provided with sliding rails on the two sides of the sliding table cylinder (11), and the inner side of the horizontal moving frame (12) is provided with a sliding block matched with the sliding table cylinder (11).

5. An automated optical lens dedicated NC machining device according to claim 3 or 4, characterized in that: The tool magazine comprises a tool magazine rotating motor (15) installed on the fixed plate (14), a circular rotating plate (16) is installed on the rotating shaft of the tool magazine rotating motor (15), a plurality of tool clamping cylinders (17) are uniformly arranged on the outer circle below the rotating plate (16), and each tool clamping cylinder (17) clamps one tool in the clamping jaw.

6. The automatic optical lens special purpose NC machining device according to claim 5, characterized in that: The inner side of the clamping jaw of the tool clamping cylinder (17) is provided with a circular arc-shaped clamping groove, and the circular arc shape of the clamping groove is matched with the tool handle.

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