Method for processing small key of watch

Abstract

The invention discloses a processing method of a small button of a watch, and relates to the technical field of watch part processing. The method comprises the steps that firstly, keys arranged in an array are machined through a CNC machine table, then a 3D drawing file of a chamfering area is drawn, and a laser machining path of the chamfering area is generated through laser control software; generating a laser processing path of a polishing area by using CAM software, and setting chamfering and polishing parameters and key array parameters; and then chamfering and polishing the keys in sequence: firstly forming a chamfer according to a set chamfering parameter and path, then polishing according to a polishing parameter and path, and finally carrying out splitting treatment on the polished keys. The advantages of CNC machining and laser processing are combined, one-stop batch chamfering and polishing of the key array are achieved, the machining precision, efficiency and quality are remarkably improved, the material utilization rate is increased, the production cost is reduced, and the method is particularly suitable for large-scale production of high-precision small watch keys.

Description

Technical Field

[0001] The present invention relates to the technical field of watch part processing, and particularly to a processing method for small watch buttons. Background Art

[0002] Currently, small buttons of smart watches are usually processed with high-hardness materials, including sapphire and other materials suitable for laser treatment. Due to their high hardness, wear resistance, good light transmittance, excellent chemical stability, and high-temperature resistance, these materials have significant advantages in enhancing the grade and quality of watches. However, due to the delicate structure of small buttons, the chamfer angles of each side are non-constant, and the materials used have high hardness, which greatly increases the processing difficulty. Currently, the processing of the main structure of small watch buttons, including chamfering, mainly relies on mechanical processing methods, such as CNC (Computer Numerical Control) machine tools. Although CNC processing performs well in many fields, when dealing with small-sized, high-precision watch buttons, there are the following limitations:

[0003] 1. Limited processing accuracy: For small-sized watch buttons, traditional CNC processing is difficult to achieve high-precision chamfering, which limits the fineness of the final product. In the one-out-many design scheme, CNC processing is difficult to meet the strict position accuracy requirements, affecting the consistency and reliability of the product.

[0004] 2. Low processing efficiency and high cost: Due to the limitations of the CNC grinding wheel path, raw material waste is caused, reducing the material utilization rate. The service life of auxiliary materials such as grinding wheels is short, and frequent replacement increases the maintenance cost and downtime. To meet the requirements of surface roughness, a polishing process usually needs to be added, increasing the process complexity and cost. The CNC processing method is relatively fixed, with poor flexibility, which is not conducive to the factory's development towards a higher degree of automation. Especially in a large-scale production environment, the time cost of CNC processing is high, and it cannot meet the needs of rapid production and market response.

[0005] 3. Low product quality: CNC processing is prone to introducing defects such as grinding wheel lines, affecting the appearance quality of the finished product. In addition, the stress generated during the mechanical processing process may have a negative impact on the quality and service life of watch buttons.

[0006] In view of the above problems, there is an urgent need for a new processing method to overcome the deficiencies in the prior art, so as to improve the precision, efficiency, and quality of small watch button processing, while reducing production costs and promoting the implementation of automated production. The present invention is an innovative solution proposed precisely for these problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: aiming at the above defects of the prior art, to provide a processing method for small watch buttons that combines CNC machining, laser chamfering and polishing machining.

[0008] To achieve the above object, the present invention provides a processing method for small watch buttons. The outer surface of the small watch button is a plane, the inner surface is a concave surface, the edge is a rounded rectangle, the chamfering angles of each side of the inner surface are different, and the transition between each side is smooth. The processing method includes the following steps:

[0009] Step S1, according to the button product drawing, use a CNC machine to process the main structures of multiple buttons on a hard transparent material board. The directions of the multiple buttons are the same and are arranged in an array.

[0010] Step S2, sequentially perform chamfering and polishing on the edges of each button through a laser, specifically including:

[0011] Step S21, draw a 3D drawing of the chamfering area according to the product drawing before chamfering and the chamfering requirements, and import the 3D drawing into the control software of the laser; the control software generates a laser processing path for the chamfering area according to the 3D drawing.

[0012] Step S22, use CAM software to generate a laser processing path drawing of the polishing area, and import the laser processing path drawing of the polishing area into the control software.

[0013] Step S23, set chamfering processing parameters, polishing parameters, the position, quantity and size of the buttons in the control software; the chamfering processing parameters and polishing parameters include laser energy, scanning speed, frequency, filling method, filling spacing, and the laser energy during polishing is lower than that during chamfering.

[0014] Step S24, fix the hard transparent material board on the operating table of the laser by vacuum adsorption, determine the processing position of the button through a CCD vision positioning system, and sequentially perform chamfering and polishing on each button. For each button, first perform chamfering according to the chamfering processing parameters and the laser processing path of the chamfering area, and then perform polishing according to the polishing parameters and the laser processing path of the polishing area.

[0015] Step S3, perform chip separation processing on the buttons that have completed the polishing process.

[0016] In the processing method of the small watch button of the present invention, in the step S1, the steps of processing the button using a CNC machine are as follows:

[0017] Design the grinding wheel according to the shape of the button to ensure it meets the processing requirements; draw the 3D drawing of the button and write the processing program, specifying the types of grinding wheels used for rough machining and finish machining as well as specific processing parameters in the program;

[0018] Import the written processing program into the CNC machine tool;

[0019] Center the grinding wheel to ensure accurate processing position;

[0020] Start the program for processing;

[0021] After processing is completed, unload the workpiece from the CNC machine tool.

[0022] In the processing method of the small watch button of the present invention, the step S1 further includes: performing a chamfering process at a corner of the hard transparent material plate to indicate the direction of the button.

[0023] In the processing method of the small watch button of the present invention, in the step S2, the laser is an infrared picosecond laser.

[0024] In the processing method of the small watch button of the present invention, in the step S24, a special fixture is used to fix the hard transparent material plate on the operating table of the laser.

[0025] In the processing method of the small watch button of the present invention, after the step S24, it further includes:

[0026] Step S25, confirm whether the size, appearance, and roughness of the button after polishing meet the requirements. If not, improve the processing effect by adjusting the chamfering processing parameters, polishing parameters, and 3D drawing file.

[0027] In the processing method of the small watch button of the present invention, the specific method of the step S3 is:

[0028] Draw the contour diagram of the button, add the marking points required for positioning in the contour diagram, and then import the contour diagram into the control software of the cutting machine tool and set the cutting parameters;

[0029] Fix the polished hard transparent material plate on the cutting machine tool through a special fixture, position the button according to the marking points through the CCD camera vision positioning system, and then cut along the edge of the button through a coherent laser;

[0030] Perform chipping along the cutting trace.

[0031] The present invention has the following beneficial effects: In the solution of the present invention, first, a CNC machine tool is used to process buttons arranged in an array, then a 3D drawing of the chamfered area is drawn, and a laser processing path for the chamfered area is generated through laser control software; then a laser processing path for the polishing area is generated using CAM software, and chamfering and polishing parameters and button array parameters are set; then chamfering and polishing treatments are performed on each button in sequence: first, chamfering is performed according to the set chamfering parameters and laser processing path, then polishing is performed according to the polishing parameters and path, and finally, the buttons that have completed polishing are subjected to die separation treatment. The present invention combines the advantages of CNC processing and laser treatment, realizes one-stop batch chamfering and polishing of button arrays, significantly improves processing accuracy, efficiency and quality, improves material utilization rate, reduces production costs, and is particularly suitable for large-scale production of small buttons for high-precision watches. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 It is a schematic diagram of the steps of the method for processing small buttons of a watch provided by an embodiment of the present invention.

[0034] Figure 2 It is a side view of a single small button of a watch processed by a CNC machine tool provided by an embodiment of the present invention.

[0035] Figure 3 It is a three-dimensional view of a single small button of a watch processed by a CNC machine tool provided by an embodiment of the present invention.

[0036] Figure 4 It is a three-dimensional view of an array of small buttons of a watch processed by a CNC machine tool provided by an embodiment of the present invention.

[0037] Figure 5 It is a bottom view of an array of small buttons of a watch processed by a CNC machine tool provided by an embodiment of the present invention.

[0038] Figure 6 It is a schematic diagram of a 3D drawing of the chamfered area provided by an embodiment of the present invention.

[0039] Figure 7 It is a side view of a single small button of a watch after chamfering treatment provided by an embodiment of the present invention.

[0040] Figure 8 It is a three-dimensional view of a single small button of a watch after chamfering treatment provided by an embodiment of the present invention.

[0041] Figure 9 It is a three-dimensional view of an array of small buttons of a watch after chamfering treatment provided by an embodiment of the present invention. Specific Embodiments

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0043] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings of the specification. It should be understood that the embodiments described herein are only for explaining and illustrating the present invention and are not used to limit the present invention.

[0044] The present invention is applicable to the processing of small smartwatch buttons with different chamfering angles on each side.

[0045] As Figures 7 to 8 shown, the outer surface of the small smartwatch button in the embodiment of the present invention is a plane, the inner surface is a concave surface, the edge is a rounded rectangle, the chamfering angles of each side of the inner surface are different, and the transition between each side is smooth. In the embodiment of the present invention, the chamfering angles of the two short sides of the inner surface are 0° and 7° respectively, and the chamfering angles of the two long sides are 21° and 22° respectively. The size of the small smartwatch button itself is small, and in addition, the chamfering angles of its sides are not constant and the transition between each side is smooth. It is very difficult to ensure the accuracy when using a traditional CNC machine tool for chamfering. Therefore, the present invention combines CNC machining and laser chamfering to provide a new solution.

[0046] As Figure 1 shown, the embodiment of the present invention provides a Figures 7 to 8 processing method for the small smartwatch button shown, and the processing method includes the following steps:

[0047] Step S1, according to the button product drawing, use a CNC machine tool to machine the main structures of multiple buttons on a hard transparent material board, and the directions of the multiple buttons are the same and arranged in an array.

[0048] In the embodiment of the present invention, the hard transparent material board includes materials suitable for making small smartwatch buttons such as sapphire glass and ceramics. The structure of a single button is as Figures 2 to 3 shown.

[0049] To improve the processing efficiency and the utilization rate of the hard transparent material board, in the embodiment of the present invention, a CNC machine tool is used to machine as Figures 4 to 5The shown one-to-many array button structure has the inner surface of the button facing upward, and each button presents a groove structure. The same direction of multiple buttons means that the sides with the same chamfer angle have the same direction. For example, the short sides with a chamfer angle of 0° all face upward, and the long sides with a chamfer angle of 21° all face left. The reasons for arranging multiple buttons in an array are as follows: First, it is convenient for CNC machining. On the CNC machine tool, the positions of each button can be controlled through programming. Second, it is convenient for subsequent laser machining. In the control software of the laser, array parameters can be set to achieve batch processing of multiple buttons according to the array positions. When machining chamfers by CNC, it is limited by the tool path of the tool head. If multiple buttons need to be machined on a large piece of material, the distance between adjacent buttons has to be increased. In the embodiment of the present invention, since the chamfering is realized by laser, the non-contact machining characteristic of the laser allows multiple buttons to be closely arranged on a large piece of hard transparent material plate, significantly improving the utilization rate of the hard transparent material. This advantage significantly improves the utilization rate of raw materials such as sapphire, reduces the material cost, and at the same time can effectively increase the output per unit area in large-scale production, enhancing the production efficiency and resource utilization efficiency.

[0050] In the embodiment of the present invention, the steps of machining buttons using a CNC machine tool are as follows:

[0051] (1) Design a grinding wheel according to the button shape to ensure that it meets the processing requirements. A diamond grinding wheel can be used to ensure the smoothness and accuracy of the button edge; draw a 3D drawing of the button and write a machining program, specifying the types of grinding wheels used for rough machining and finish machining and the specific machining parameters in the program. In the embodiment of the present invention, the parameters are as follows: Feed: 500 mm / min for roughing, 300 mm / min for finishing; Spindle speed: 24000 - 26000 r / min; Depth of cut: 0.03 mm - 0.01 mm for roughing.

[0052] (2) Import the written machining program into the CNC machine tool.

[0053] (3) Center the grinding wheel to ensure accurate machining position.

[0054] (4) Start the program for machining.

[0055] (5) After machining, unload the workpiece from the CNC machine tool.

[0056] In the embodiment of the present invention, step S1 further includes: performing a chamfering process at a corner of the hard transparent material plate to indicate the direction of the button. As Figures 4 to 5 shown, a chamfering process is performed at the upper left corner of the hard transparent material plate to indicate the direction information of the button through the chamfer.

[0057] Step S2, perform chamfering and polishing processes on the edges of each button in sequence through a laser, specifically including:

[0058] Step S21: Draw a 3D drawing of the chamfering area according to the product drawing before chamfering and the chamfering requirements, and import the 3D drawing into the control software of the laser; the control software generates the laser processing path of the chamfering area according to the 3D drawing. The control software layers the 3D drawing according to the focal depth and the depth to be laser-engraved, and dynamically adjusts the focal position to generate the laser processing path of the chamfering area.

[0059] As Figure 6 shown, the 3D drawing of the chamfering area is the part to be removed in the subsequent laser processing. In the embodiment of the present invention, in order to ensure the accuracy of chamfering processing, it is necessary to strictly draw the 3D drawing of the chamfering area according to the product drawing and the chamfering requirements. In practical applications, when drawing the 3D drawing of the chamfering area, first copy the button product drawing before chamfering, and then draw the chamfering surface on this basis. The 3D drawing needs to completely and meticulously reflect the geometric information of each part of the product and key elements such as the chamfering angle and transition relationship, providing accurate data support for the subsequent laser engraving processing.

[0060] In the embodiment of the present invention, the laser is an infrared picosecond laser. In order to ensure the processing accuracy and reduce the problems of material deformation or damage caused by the heat-affected zone, the infrared picosecond laser with a relatively high single-pulse energy is adopted in the embodiment of the present invention.

[0061] In the embodiment of the present invention, by drawing the 3D drawing of the removed part according to the product drawing and importing it into the laser operation console, and using the software to accurately control the focus to be focused on the product surface, it is possible to accurately achieve chamfering with a non-constant angle, and the transition between each direction is smooth. This processing method breaks through the limitations of traditional processing means in complex angle control, effectively guarantees the processing accuracy of the product, meets the stringent requirements of the watch button for high-precision and high-quality appearance, and greatly improves the delicacy and technological level of the product.

[0062] Step S22: Use CAM software to generate a laser processing path drawing of the polishing area, and import the laser processing path drawing of the polishing area into the control software.

[0063] Because the chamfer angles of the keys are different and the edges have a smooth transition, the key edges after chamfering are complex curved structures, and the control software of the laser cannot generate a processing path for polishing. In an embodiment of the present invention, Siemens NX software (commonly known as UG (Unigraphics)) is used to assist in generating the laser processing path for the polishing area. Select the chamfered key product surface in Siemens NX, use the CAM function module in Siemens NX to plan the specific path of the laser, and select the 3D surface spiral line drive mode for the path. After the planning is completed, output the 3D spiral line drawing. The 3D spiral line drawing contains a series of galvanometer instructions, which are used to control the laser focus to move according to the laser processing path of the set polishing area.

[0064] Step S23, setting the chamfering processing parameters, polishing parameters, button positions, quantities and sizes in the control software. The chamfering processing parameters and polishing parameters include laser energy, scanning speed, frequency, filling method, and filling spacing. The laser energy during polishing is lower than the laser energy during chamfering. In the embodiment of the present invention, the chamfering processing parameters are: laser energy: 18% to 26%, scanning speed: 1600 to 2200 mm / s, frequency: 400 KHz, filling method: line filling at 90 degrees and 0 degrees, filling spacing: 0.015 mm, and polishing parameters are: laser energy: 16% to 18%, scanning speed: 2000 mm / s, frequency: 400 KHz, filling spacing: 0.015 mm.

[0065] Step S24, fix the hard transparent material plate on the operating table of the laser by vacuum adsorption, determine the processing position of the key by CCD visual positioning system, and chamfer and polish each key in turn. For each key, first chamfer it according to the chamfering processing parameters and the laser processing path of the chamfering area, and then polish it according to the polishing parameters and the laser processing path of the polishing area.

[0066] In the embodiment of the present invention, a special fixture is used to fix the hard transparent material plate on the operating table of the laser to ensure that the level of the fixture is controlled within 0.02 mm, thereby ensuring the level of the key as a whole and facilitating the precise control of the position of the laser focus. The CCD visual positioning system uses a high-resolution camera and an efficient image processing algorithm to ensure the accuracy of the key processing position.

[0067] During the chamfering process, the control software adjusts the landing point and angle of the focus on the product surface in real-time and dynamically according to the different chamfering angle requirements of each side in the 3D drawing, so as to meet the complex processing requirements of non-constant angle chamfering. In practical applications, through technical means such as optimizing the optical system and calibration mechanism, it is ensured that the laser beam can be stably focused on the product surface during the processing, avoiding the influence of focus shift and other situations on the chamfering accuracy, and maintaining the accuracy and stability of non-constant angle chamfering for each side of the product during the whole processing process.

[0068] In the embodiment of the present invention, two parameter modes of chamfering processing parameters and polishing parameters are creatively set. The chamfering processing parameters are used to quickly remove materials to efficiently shape the basic shape and chamfer contour of the product; while the polishing parameters focus on the fine processing of the machined surface, significantly improving the surface finish while ensuring the processing accuracy. Among them, the laser energy during polishing is lower than that during chamfering processing. By precisely controlling the energy input, a seamless transition from rough machining to finish machining is achieved.

[0069] In the embodiment of the present invention, by pre-setting the chamfering processing parameters, polishing parameters, and array information of the keys in the control software and fixing the positions of the hard transparent material plate and the CCD vision positioning system, one-stop batch processing of all keys can be achieved. As Figure 9 shown is the schematic diagram of the key structure after batch processing. For each key, chamfering is performed first, and then polishing is performed. The present invention innovatively uses a laser with lower energy to finely polish the chamfered surface of the complex curved surface to achieve a polishing effect. Compared with the liquid polishing method in the prior art, there is no need for secondary clamping, positioning and other processes between the chamfering process and the polishing process of a single key, which simplifies the process flow and improves the production efficiency.

[0070] In the embodiments of the present invention, chamfers are formed by laser. During the laser processing, since non-contact processing is adopted, direct mechanical friction with the workpiece is avoided, and the auxiliary workpiece has almost no loss, greatly reducing the tool replacement frequency and cost during the processing. At the same time, compared with CNC processing, the laser processing speed is higher, which can significantly shorten the processing time of a single product and the overall production cycle, significantly improving the production efficiency, helping the enterprise to quickly respond to demands in the fierce market competition, and improving the production capacity and supply capacity. After CNC processing, an additional polishing process is often required to obtain the expected surface roughness. However, in the laser processing of the present invention, by adopting appropriate parameters such as power, the expected surface quality can be directly obtained without additional polishing. This not only simplifies the production process, reduces the input of human and material resources in the production process, reduces the production cost, but also avoids the processing errors and quality risks that may be introduced due to multiple process conversions, effectively improving the consistency and stability of the product. In addition, laser processing is easier to achieve factory automation than CNC. Its software-controlled processing mode can be easily integrated with the automated production line to achieve fully automated continuous production from raw material loading, processing to finished product unloading. This helps to reduce manual intervention, improve the stability and reliability of the production process, reduce the labor cost, and at the same time improve the controllability of the product quality, providing strong support for the construction of a modern intelligent manufacturing factory and meeting the development needs of the Industry 4.0 era for efficient and intelligent production.

[0071] Step S25: Confirm whether the size, appearance, and roughness of the button after polishing meet the requirements. If not, improve the processing effect by adjusting the chamfering processing parameters, polishing parameters, and 3D drawing files.

[0072] The most important parameters after processing are size, appearance, and roughness. If the size and appearance do not meet the requirements, gradually improve them by adjusting the laser power and 3D drawing files. If the roughness does not meet the expectations, improve it by modifying parameters such as the angle of the filling lines of the laser, the filling spacing, and the laser energy.

[0073] Step S3: Perform a die splitting process on the button that has completed the polishing process.

[0074] In the embodiments of the present invention, the steps of the die splitting process are as follows:

[0075] (1) Draw a button contour diagram, add marker points required for positioning in the contour diagram, and then import the contour diagram into the control software of the cutting machine, and set the cutting parameters;

[0076] (2) Fix the polished hard transparent material plate on the cutting machine through a special jig, locate the key according to the marking point through the CCD camera visual positioning system, and then cut along the edge of the key through a coherent laser; in the embodiment of the present invention, the laser machine used for laser cutting is a coherent laser Lx30, and the cutting parameters are: frequency 49KHz, power 30W, point spacing 14um, and cutting speed 30mm / s. The jig used for cutting is the same as the jig used for chamfering and polishing, and its function is also to fix the product through vacuum adsorption.

[0077] (3) Splitting along the cutting marks. In the embodiment of the present invention, a special splitting jig is used to absorb the main part of the cut product, and the excess part falls off under the action of the CO2 laser. In this step, ultrasonic splitting equipment or other splitting equipment can also be used for splitting.

[0078] The above are only specific implementations of the present invention, which cannot be used to limit the scope of the present invention. Equivalent changes made by ordinary technicians in this technical field based on this creation, as well as changes known to technicians in this field, should still fall within the scope of the present invention.

Claims

1. A processing method for a small watch button, wherein the outer surface of the small watch button is a plane, the inner surface is a concave surface, the edge is a rounded rectangle, the chamfer angles of each side of the inner surface are different, and the transition between each side is smooth. The method is characterized in that, The processing method includes the following steps: Step S1, according to the key product drawing, use a CNC machine tool to process the main structures of multiple keys on a hard transparent material board. The directions of the multiple keys are the same and arranged in an array; Step S2, chamfer and polish the edges of each key in sequence through a laser, specifically including: Step S21, draw a 3D drawing of the chamfering area according to the product drawing before chamfering and the chamfering requirements, and import the 3D drawing into the control software of the laser; the control software generates a laser processing path for the chamfering area according to the 3D drawing; Step S22, use CAM software to generate a laser processing path drawing of the polishing area, and import the laser processing path drawing of the polishing area into the control software; Step S23, set the chamfering processing parameters, polishing parameters, positions, quantities and sizes of the keys in the control software; the chamfering processing parameters and polishing parameters include laser energy, scanning speed, frequency, filling method, filling spacing, and the laser energy during polishing is lower than that during chamfering; Step S24, fix the hard transparent material board on the operating table of the laser by vacuum adsorption, determine the processing positions of the keys through a CCD vision positioning system, and chamfer and polish each key in sequence. For each key, first perform chamfering according to the chamfering processing parameters and the laser processing path of the chamfering area, and then perform polishing according to the polishing parameters and the laser processing path of the polishing area; Step S3, perform a dicing process on the keys that have completed the polishing process.

2. The processing method of the small button of the watch according to claim 1, characterized in that, In the step S1, the steps of processing the keys using a CNC machine tool are as follows: Design a grinding wheel according to the key shape to ensure that it meets the processing requirements; draw a 3D drawing of the key and write a processing program, specifying the types of grinding wheels used for rough machining and finish machining and the specific processing parameters in the program; Import the written processing program into the CNC machine tool; Center the grinding wheel to ensure accurate processing positions; Start the program for processing; After the processing is completed, unload the workpiece from the CNC machine tool.

3. The processing method of the small watch button according to claim 1, characterized in that, The step S1 further includes: performing a chamfering process at a corner of the hard transparent material board to indicate the direction of the key.

4. The processing method of the small button of the watch according to claim 1, characterized in that In the step S2, the laser is an infrared picosecond laser.

5. The processing method of the small button of the watch according to claim 1, characterized in that In step S24, a special fixture is used to fix the hard transparent material board on the operating table of the laser.

6. The processing method of the small button of the watch according to claim 1, characterized in that, After the step S24, it further includes: Step S25, confirm whether the sizes, appearances and roughnesses of the keys after the polishing process meet the requirements. If not, improve the processing effect by adjusting the chamfering processing parameters, polishing parameters and 3D drawing.

7. The processing method of the small watch button according to claim 1, characterized in that The specific method of the step S3 is: Draw a key contour diagram, add marking points required for positioning in the contour diagram, and then import the contour diagram into the control software of the cutting machine tool and set the cutting parameters; Fix the polished hard transparent material board on the cutting machine tool through a special fixture, position the keys according to the marking points through a CCD camera vision positioning system, and then perform cutting along the edges of the keys through a coherent laser; Perform dicing along the cutting traces.

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