Numerical control forming device for slotting spectacle lens

Abstract

The utility model discloses numerical control forming device that glasses lens was used in grooving, including multiaxis movement platform and visual identification module, still including grinding wheel processing module and positioning fixture, positioning fixture installs on the rotating platform, visual identification module installs on one side of grinding wheel processing module, and the grinding wheel of grinding wheel processing module adopts three layer structure design, and the middle layer is precision forming grinding wheel, is used for the grooving of glasses lens, and the upper and lower two layers are auxiliary polishing grinding wheel, after the grooving processing is completed, and precision forming grinding wheel slightly separates the grooving of lens, and changes to use auxiliary polishing grinding wheel to polish the groove and its external edge place, and the moving distance is small, and need not to shift lens, and positioning fixture is used for the quick positioning of glasses, and vacuum adsorption unit generally does not use, when in processing some curved surface camber bigger lens, when single main vacuum adsorption head can not satisfy adsorption positioning demand, vacuum adsorption unit is used for providing auxiliary adsorption, and can adjust and perfectly fit with mirror surface, and enhances adsorption effect.

Description

Technical Field

[0001] This utility model relates to the field of lens processing equipment technology, specifically a CNC forming device for slotting eyeglass lenses. Background Technology

[0002] As consumers increasingly demand aesthetically pleasing, lightweight, and personalized eyewear, the market share of rimless and semi-rimless glasses continues to expand. The assembly of these glasses relies on precisely machining a "U-shaped" or "V-shaped" groove on the lens edge for embedding nylon filaments. Currently, the mainstream grooving equipment in the industry has gradually evolved from purely manual mechanical machines to CNC grooving machines. These machines typically employ two-axis or three-axis linkage control systems, driving diamond or CBN forming wheels through preset programs, achieving basic automation. Nevertheless, significant shortcomings still exist in the following key aspects.

[0003] In existing technologies, most CNC grooving machines are single-function devices. After grooving, microscopic burrs or chipping inevitably occur inside the groove and at the groove edge. The lens must be removed from the machine and transferred to a separate polishing device for secondary clamping, positioning, and polishing. This process not only increases the number of operation steps and total time but also introduces positioning error risks during secondary clamping, affecting processing consistency. Furthermore, the clamping systems of existing equipment are mostly simple in design, typically using a single vacuum chuck or mechanical clamp. While this may be sufficient for conventional plano lenses, it is insufficient for lenses with large curvatures, such as high-curvature sunglass lenses and the edge areas of progressive multifocal lenses. A single adsorption point or planar adsorption makes it difficult to achieve complete contact between the curved back surface of the lens and the adsorption surface, resulting in uneven adsorption force and insufficient positioning rigidity. Therefore, a CNC forming device is designed that integrates grooving and polishing functions onto the same rotating spindle. Simultaneously, a composite vacuum clamp consisting of a main adsorption unit and an adjustable auxiliary adsorption unit is designed to overcome these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC forming device for grooving eyeglass lenses, in order to solve the problems mentioned in the background art that most CNC grooving machines are only single-function devices, requiring the lens to be transferred for secondary clamping, positioning and polishing, and that the existing equipment's clamping system is mostly simple in design, with uneven adsorption force and insufficient positioning rigidity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a CNC forming device for slotting spectacle lenses, comprising a multi-axis motion platform and a vision recognition module, as well as a grinding wheel processing module and a positioning fixture. The multi-axis motion platform consists of an X / Y / Z three-axis precision linear module and a rotary platform. The grinding wheel processing module is mounted on the work base and located above the multi-axis motion platform. The grinding wheel processing module consists of a multi-angle rotating arm and a grinding wheel polishing mechanism. The positioning fixture is mounted on the rotary platform. The vision recognition module is mounted on one side of the grinding wheel processing module. The positioning fixture consists of a mold and a main vacuum suction head. The mold is adapted to the shape of the spectacle lens.

[0006] Based on the preferred embodiment of this technical solution, the grinding wheel of the grinding wheel processing module adopts a three-layer structure design, with the middle layer being a precision forming grinding wheel used for grooving eyeglass lenses, and the upper and lower layers being auxiliary polishing grinding wheels.

[0007] In a preferred embodiment of this technical solution, the surface of the auxiliary polishing wheel is provided with multiple grooves arranged in a circumferential array, and the grooves are filled with flexible protrusions, which are used to assist in scraping away residual waste.

[0008] Based on the preferred embodiment of this technical solution, a pneumatic nozzle is fixedly installed on the multi-angle rotating arm of the grinding wheel processing module. The pneumatic nozzle is used to clean the waste debris in the lens groove, and a pneumatic nozzle is fixedly installed on one side of the lens of the vision recognition module.

[0009] Based on the preferred embodiment of this technical solution, the pneumatic nozzle one and the grinding wheel processing module adopt a linkage operation mode. When the grinding wheel processing module is started, the pneumatic nozzle one is in the open state, and the pneumatic nozzle two adopts a timed start operation mode.

[0010] Based on the preferred embodiment of this technical solution, multiple vacuum adsorption units are evenly distributed around the main vacuum adsorption head. Each vacuum adsorption unit consists of a vacuum suction cup and an electric telescopic rod. The vacuum suction cup is fixedly installed on the output end of the electric telescopic rod, which is used to adjust the position of the vacuum suction cup.

[0011] Based on the preferred embodiment of this technical solution, a vibration sensing module is fixedly installed on the grinding wheel grinding mechanism of the grinding wheel processing module. The vibration sensing module is electrically connected to the CNC system. When the vibration amplitude is too large, the CNC system will control the grinding wheel to retract.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This CNC forming device utilizes visual recognition positioning and adaptive force control processing mode to achieve efficient grooving processing of eyeglass lenses. With the help of software algorithms, it can automatically identify the placement of lens contours and invisible engravings, and calculate the benchmark for the optimal grooving path, eliminating the need for manual drawing or alignment, thereby achieving precision processing at various angles.

[0013] 2. The grinding wheel of the grinding wheel processing module adopts a three-layer structure design. The middle layer is a precision forming grinding wheel for grooving the eyeglass lens. The upper and lower layers are auxiliary polishing grinding wheels. After the grooving is completed, the multi-angle processing arm will cause the precision forming grinding wheel to slightly detach from the grooving of the lens, and then use the auxiliary polishing grinding wheel to finely polish the grooving and its outer edge. The movement distance is small and there is no need to transfer the lens, which greatly improves the work efficiency.

[0014] 3. The positioning fixture is used for rapid positioning of the lens. The positioning fixture consists of a mold and a main vacuum adsorption head. The mold provides initial positioning for the lens, and the main vacuum adsorption head below provides vacuum adsorption. The vacuum adsorption unit is generally not used. When processing lenses with large curvature, a single main vacuum adsorption head cannot meet the adsorption and positioning requirements. The vacuum adsorption unit is used to provide auxiliary adsorption and can be adjusted to perfectly fit the lens surface to enhance the adsorption effect. Attached Figure Description

[0015] Figure 1 A schematic diagram of one embodiment of the CNC forming device for slotting eyeglass lenses according to this utility model; Figure 2 This is a schematic diagram of the distribution structure of the grinding wheel processing module and positioning fixture of this utility model; Figure 3 This is a schematic diagram of the connection structure between the grinding wheel processing module and the pneumatic nozzle of this utility model; Figure 4 This is a schematic diagram of the distribution structure of the vacuum adsorption unit and the main vacuum adsorption head of this utility model; Figure 5 This is a schematic diagram of the connection structure between the precision forming grinding wheel and the auxiliary polishing grinding wheel of this utility model; Figure 6 This is a schematic cross-sectional view of the positioning clamp and electric telescopic rod of this utility model.

[0016] In the diagram: 1. Multi-axis motion platform; 2. Grinding wheel processing module; 3. Vision recognition module; 4. Positioning fixture; 5. Precision forming grinding wheel; 6. Auxiliary polishing grinding wheel; 7. Pneumatic nozzle one; 8. Vibration sensing module; 9. Pneumatic nozzle two; 10. Vacuum adsorption unit; 11. Mold; 12. Electric telescopic rod; 13. Main vacuum adsorption head. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-6 This utility model provides an embodiment of a CNC forming device for grooving eyeglass lenses, including a multi-axis motion platform 1 and a vision recognition module 3, as well as a grinding wheel processing module 2 and a positioning fixture 4. The multi-axis motion platform 1 consists of an X / Y / Z three-axis precision linear module and a rotary platform. The grinding wheel processing module 2 is mounted on the working base and located above the multi-axis motion platform 1. The grinding wheel processing module 2 consists of a multi-angle rotating arm and a grinding wheel grinding mechanism. The positioning fixture 4 is mounted on the rotary platform. The vision recognition module 3 is mounted on one side of the grinding wheel processing module 2. The positioning fixture 4 consists of a mold 11 and a main vacuum suction head 13. The mold 11 is adapted to the shape of the eyeglass lens. This CNC forming device uses vision recognition positioning and adaptive force control processing mode to achieve efficient grooving of eyeglass lenses. With the help of software algorithms, it can automatically identify the placement of lens contours and invisible engravings, and calculate the reference for the optimal grooving path, eliminating the need for manual drawing or manual alignment, thereby achieving precision processing at various angles.

[0019] Please see Figure 5 A further solution based on this embodiment is as follows: The grinding wheel of the grinding wheel processing module 2 adopts a three-layer structure design. The middle layer is a precision forming grinding wheel 5, which is used for grooving the eyeglass lens. The upper and lower layers are auxiliary polishing grinding wheels 6. After the grooving is completed, the multi-angle processing arm will cause the precision forming grinding wheel 5 to slightly detach from the grooving of the lens, and the auxiliary polishing grinding wheel 6 will be used to polish the grooving and its outer edge. The movement distance is small and there is no need to transfer the lens, which greatly improves the work efficiency.

[0020] Please see Figure 5 A further solution based on this embodiment is as follows: the surface of the auxiliary polishing wheel 6 is provided with multiple grooves arranged in a circumferential array, and the grooves are filled with flexible protrusions. The flexible protrusions are used to assist in scraping away residual waste. During the fine polishing process, the flexible protrusions filled in the grooves on the surface of the auxiliary polishing wheel 6 will continuously carry out the residual waste in the grooves. With the airflow assistance provided by the pneumatic nozzle 7, the waste can be discharged from the grooves.

[0021] Please see Figure 2 A further solution based on this embodiment is as follows: a pneumatic nozzle 7 is fixedly installed on the multi-angle rotating arm of the grinding wheel processing module 2. The pneumatic nozzle 7 is used to clean the waste debris in the lens groove. A pneumatic nozzle 9 is fixedly installed on one side of the lens of the vision recognition module 3. The pneumatic nozzle 9 is used to clean the waste debris and dust and other dirt accumulated on the lens surface of the vision recognition module 3, so as to ensure that the vision recognition module 3 can still work stably in a complex working environment.

[0022] Please see Figure 2 A further solution based on this embodiment is as follows: the pneumatic nozzle 7 and the grinding wheel processing module 2 adopt a linkage operation mode. When the grinding wheel processing module 2 is started, the pneumatic nozzle 7 is in the open state. The pneumatic nozzle 9 adopts a timed start operation mode. During processing, the pneumatic nozzle 7 needs to be kept open to ensure that the waste can be discharged quickly. The pneumatic nozzle 9 does not need to be turned on frequently. It only needs to ensure that the lens is clean, thereby saving air consumption.

[0023] Please see Figure 4 A further solution based on this embodiment is as follows: multiple vacuum adsorption units 10 are evenly distributed around the main vacuum adsorption head 13. Each vacuum adsorption unit 10 consists of a vacuum suction cup and an electric telescopic rod 12. The vacuum suction cup is fixedly installed on the output end of the electric telescopic rod 12. The electric telescopic rod 12 is used to adjust the position of the vacuum suction cup. The vacuum adsorption unit 10 is generally not used. When processing some lenses with large curvature, if a single main vacuum adsorption head 13 cannot meet the adsorption and positioning requirements, the vacuum adsorption unit 10 is used to provide auxiliary adsorption. Its height can be adjusted by the electric telescopic rod 12, so that multiple vacuum adsorption units 10 can perfectly fit with the lens surface, enhancing the adsorption effect. This is suitable for adsorption and fixation of different types of lenses.

[0024] Please see Figure 3 A further solution based on this embodiment is as follows: A vibration sensing module 8 is fixedly installed on the grinding mechanism of the grinding wheel processing module 2. The vibration sensing module 8 is electrically connected to the CNC system. When the vibration amplitude is too large, the CNC system will control the grinding wheel to retract. The vibration sensing module 8 judges whether the processing flow is smooth based on the sensed vibration amplitude. When the vibration amplitude is far beyond the preset value, the vibration sensing module 8 will transmit the signal to the CNC system. The control center will then control the grinding wheel to retract slightly. After cooling for a period of time, it will return to the processing position. If the vibration amplitude returns to normal, processing will continue. If the amplitude remains the same, it indicates that there is a problem and relevant personnel need to perform maintenance.

[0025] Working principle: This CNC forming device uses visual recognition positioning and adaptive force control machining mode to achieve efficient grooving of eyeglass lenses. The visual recognition module 3, together with the software algorithm, can automatically identify the lens outline and invisible engravings placed on the positioning fixture 4, and calculate the reference of the best grooving path, without the need for manual drawing or manual alignment. The multi-axis motion platform 1 and the grinding wheel machining module 2, together with the software algorithm, achieve precision machining at various angles through the X / Y / Z three-axis precision linear module, rotary platform and multi-angle rotating arm.

[0026] The grinding wheel of the grinding wheel processing module 2 adopts a three-layer structure design. The middle layer is a precision forming grinding wheel 5, which is used for grooving the eyeglass lens. The upper and lower layers are auxiliary polishing grinding wheels 6. After the precision forming grinding wheel 5 completes the grooving of the lens, the multi-angle processing arm will make the precision forming grinding wheel 5 slightly separate from the grooving of the lens, and then use the auxiliary polishing grinding wheel 6 to finely polish the grooving and its outer edge to ensure the flatness of the grooving of the lens.

[0027] During the fine polishing process, the flexible protrusions filling the grooves on the surface of the auxiliary polishing wheel 6 will continuously carry out the waste residue remaining in the groove. With the airflow assistance provided by the pneumatic nozzle 7, the waste residue can be discharged from the groove.

[0028] The positioning fixture 4 is used for rapid positioning of the lens. The positioning fixture 4 consists of a mold 11 and a main vacuum adsorption head 13. After the lens is placed on the mold 11, the mold 11 will provide initial positioning for the lens. The main vacuum adsorption head 13 below is used to provide vacuum adsorption, so that the lens can be firmly fixed in the mold 11.

[0029] Multiple vacuum adsorption units 10 are evenly distributed around the main vacuum adsorption head 13. The vacuum adsorption units 10 are generally not used. When processing lenses with large curvature, a single main vacuum adsorption head 13 cannot meet the adsorption and positioning requirements. The vacuum adsorption units 10 are used to provide auxiliary adsorption. Their height can be adjusted by the electric telescopic rod 12, so that multiple vacuum adsorption units 10 can fit perfectly with the lens surface, enhancing the adsorption effect. This method is suitable for adsorption and fixing of different types of lenses.

[0030] The vibration sensing module 8 determines whether the processing flow is smooth based on the amplitude of the sensed vibration. When the vibration amplitude far exceeds the preset value, the vibration sensing module 8 will transmit the signal to the CNC system. The control center will then control the grinding wheel to retract slightly. After cooling for a period of time, it will return to the processing position. If the vibration amplitude returns to normal, processing will continue. If the amplitude remains the same, it indicates a problem and relevant personnel need to perform maintenance.

[0031] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC forming device for slotting spectacle lenses, comprising a multi-axis motion platform (1) and a vision recognition module (3), characterized in that: It also includes a grinding wheel processing module (2) and a positioning fixture (4). The multi-axis motion platform (1) consists of a three-axis precision linear module of X / Y / Z and a rotating platform. The grinding wheel processing module (2) is installed on the working base and located above the multi-axis motion platform (1). The grinding wheel processing module (2) consists of a multi-angle rotating arm and a grinding wheel grinding mechanism. The positioning fixture (4) is installed on the rotating platform. The vision recognition module (3) is installed on one side of the grinding wheel processing module (2). The positioning fixture (4) consists of a mold (11) and a main vacuum suction head (13). The mold (11) is adapted to the shape of the eyeglass lens.

2. The CNC forming device for slotting spectacle lenses according to claim 1, characterized in that: The grinding wheel of the grinding wheel processing module (2) adopts a three-layer structure design. The middle layer is a precision forming grinding wheel (5) used for grooving eyeglass lenses, and the upper and lower layers are auxiliary polishing grinding wheels (6).

3. The CNC forming device for slotting spectacle lenses according to claim 2, characterized in that: The surface of the auxiliary polishing wheel (6) is provided with multiple grooves arranged in a circumferential array, and the grooves are filled with flexible protrusions, which are used to assist in scraping away residual waste.

4. The CNC forming device for slotting spectacle lenses according to claim 3, characterized in that: A pneumatic nozzle 1 (7) is fixedly installed on the multi-angle rotating arm of the grinding wheel processing module (2). The pneumatic nozzle 1 (7) is used to clean the waste in the lens groove. A pneumatic nozzle 2 (9) is fixedly installed on one side of the lens of the vision recognition module (3).

5. The CNC forming device for slotting spectacle lenses according to claim 4, characterized in that: The pneumatic nozzle 1 (7) and the grinding wheel processing module (2) adopt a linkage operation mode. When the grinding wheel processing module (2) is started, the pneumatic nozzle 1 (7) is in the open state, and the pneumatic nozzle 2 (9) adopts a timed start operation mode.

6. The CNC forming device for slotting spectacle lenses according to claim 5, characterized in that: Multiple vacuum adsorption units (10) are evenly distributed around the main vacuum adsorption head (13). Each vacuum adsorption unit (10) consists of a vacuum suction cup and an electric telescopic rod (12). The vacuum suction cup is fixedly installed on the output end of the electric telescopic rod (12), which is used to adjust the position of the vacuum suction cup.

7. The CNC forming device for slotting spectacle lenses according to claim 6, characterized in that: A vibration sensing module (8) is fixedly installed on the grinding mechanism of the grinding wheel processing module (2). The vibration sensing module (8) is electrically connected to the CNC system. When the vibration amplitude is too large, the CNC system will control the grinding wheel to retract.

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