Light-curing and milling combined machining apparatus and method for complex specially-shaped ceramic parts

Abstract

A light-curing and milling combined machining apparatus for complex specially-shaped ceramic parts. The light-curing and milling combined machining apparatus comprises a milling system (1), a shielding device (3), a light-curing system and a servo system, wherein the milling system (1) comprises a milling device and milling guide rails (2); the shielding device (3) comprises a first shielding plate (31) and a second shielding plate (32); the light-curing system comprises a light source system (10), a slurry tank (6), a worktable (9), worktable Z-axis polished rods (7), a worktable Z-axis ball screw (4) and a worktable Z-axis sliding block (5); and the servo system comprises a servo electric motor, a lead screw guide rail and an electric-motor supporting sliding block (8). By means of combining light curing with milling, a machined product has the advantages of both conventional subtractive manufacturing and additive manufacturing; moreover, a circular guide rail, an arc-shaped guide rail and the shielding device integrate the light-curing system with the milling device, so that the apparatus is more convenient to use, and the working accuracy is improved. Further provided is a light-curing and milling combined machining method for complex specially-shaped ceramic parts.

Description

Equipment and method for composite processing of complex and special-shaped ceramic parts by light curing and milling Technical Field

[0001] The present invention relates to the field of additive and subtractive composite processing, and in particular to a device and method for composite processing of complex and special-shaped ceramic parts by light curing and milling. Background Art

[0002] With the development of mechanical design and manufacturing technology, the shapes of mechanical components are becoming increasingly complex, and difficult-to-process materials are being used more and more widely. Traditional machining and additive manufacturing processes are facing great challenges. Simply applying a single machining method cannot effectively solve the problem. Therefore, hybrid machining solutions have emerged. Hybrid machining refers to the use of different machining mechanisms to complete the processing of parts, such as the combination of additive manufacturing and cutting, and the combination of electrical machining and ultrasonic machining. The hybrid machining process significantly improves the machinability of difficult-to-process materials by leveraging the complementary advantages of different machining methods, reduces milling cutter wear, simplifies the machining process, and plays a positive role in the machining of complex structural parts. It has opened up new ideas for new product development and greatly promoted design and process innovation.

[0003] Additive and subtractive manufacturing (HASM) combines conventional numerical control (CNC) technology with additive manufacturing (AM). This technology combines the advantages of conventional AM and conventional CNC technology. AM plays a key role in the machining of geometrically complex parts. Complex parts produced using AM alone often suffer from poor precision and appearance quality. While conventional CNC machining of complex parts is cumbersome and produces significant waste, it offers advantages such as high precision and excellent appearance quality. Therefore, AM and AM complement each other, minimizing or even eliminating each other's defects through combined machining. AM combines these two technologies to form a comprehensive process offering high precision, high intelligence, and robust structural machinability. Currently, this technology has attracted considerable attention from domestic researchers and is widely used in the manufacture of complex mechanical structures, demonstrating its promising prospects. However, existing technologies lack mature processing equipment, with most employing only a single processing method. Therefore, there is an urgent need for a composite processing device suitable for complex and irregularly shaped ceramic parts.

[0004] Summary of the Invention

[0005] In order to address the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a light-curing and milling composite processing equipment and method for complex and special-shaped ceramic parts, which can combine traditional CNC technology with additive manufacturing technology to provide a new composite processing equipment.

[0006] Specifically, a light curing and milling composite processing equipment for complex and special-shaped ceramic parts includes a milling system, a shielding device, a light curing system, and a servo system;

[0007] The milling system includes a milling device and a milling guide rail. The milling guide rail includes a circular guide rail and a curved guide rail. The outer walls of the circular guide rail and the curved guide rail are both provided with an external tooth profile. The end of the curved guide rail is fixedly connected to the upper surface of the circular guide rail by welding. The milling device meshes with the curved guide rail and the circular guide rail through gears and can slide along the curved guide rail and the circular guide rail. The shielding device is provided between the milling system and the light curing system.

[0008] The shielding device includes a first shielding plate and a second shielding plate, the first shielding plate and the second shielding plate are arranged opposite to each other, and an arc-shaped groove is opened on the inner upper surface of the first shielding plate and the second shielding plate, and the circular guide rail is placed in the arc-shaped groove;

[0009] The light curing system includes a light source system, a slurry tank, a workbench, a Z-axis polished rod for the workbench, a Z-axis ball screw for the workbench, and a Z-axis slider for the workbench; the workbench has an X-axis rotational displacement, and the Z-axis polished rod for the workbench has a Z-axis translational displacement; the first ends of the Z-axis polished rod and the Z-axis slider for the workbench are arranged on the light source system, the second ends of the two Z-axis polished rods for the workbench are connected to the lower surface of the first baffle plate, and the second ends of the two Z-axis polished rods and the Z-axis ball screw for the workbench are respectively connected to the lower surface of the second baffle plate; the slurry tank is arranged above the light source system, and the workbench is arranged above the slurry tank;

[0010] The servo system includes a servo motor, a lead screw guide rail, and a motor support slider. The servo motor is arranged at the end of the lead screw guide rail in the extension direction. The lead screw guide rail passes through the workbench and is connected to the motor support slider and the workbench Z-axis slider at both ends. The motor support slider and the workbench Z-axis slider are both threadedly connected to the lead screw guide rail.

[0011] The milling device includes an electric spindle, a milling cutter, an electric spindle fixture, an X-axis base, an X-axis drive motor, a Y-axis base, a Y-axis drive motor, a Z-axis polished rod, a Z-axis optical tube, a Z-axis ball screw, a Z-axis threaded tube, a Z-axis drive motor, a drive housing, a drive motor, a drive gear and a transmission shaft. The Z-axis ball screw is arranged in the Z-axis threaded tube, and the milling device is driven to rotate to achieve axial movement in space. The Z-axis polished rod is arranged in the Z-axis optical tube to reduce the error caused by vibration of the device. The drive housing is arranged outside the arc guide rail, and the drive motor, drive gear and transmission shaft are all arranged inside the drive housing. The drive gear is respectively engaged with the outer tooth profiles of the circular guide rail and the arc guide rail. The electric spindle fixture is arranged outside the electric spindle and is used to clamp and fix the electric spindle. One end of the electric spindle is connected to the milling cutter, which drives the milling cutter to rotate to complete milling.

[0012] Preferably, a heating plate is provided at the bottom of the slurry tank.

[0013] Preferably, the arc-shaped guide rails are semicircular and two are provided.

[0014] Preferably, grooves are provided on inner sides of the first shielding plate and the second shielding plate.

[0015] Preferably, the light curing system is provided with an X-axis axial rotation motor.

[0016] On the other hand, the present invention also provides a processing method of a light curing and milling composite processing device for complex and special-shaped ceramic parts, which comprises the following steps:

[0017] S1. Setting servo system parameters, which include the motion parameters of the workbench and the motion path and motion rate of the milling cutter;

[0018] S2: Start working, the heating plate heats up, and the servo motor drives the Z-axis ball screw of the workbench to a position m+1 set layer thickness distance from the bottom of the slurry tank, where m is the number of cured layers. The light source system starts working to cure the photosensitive resin layer above the workbench and form the first layer of the green body. The green body then floats up a certain distance and repeats the above steps to complete the printing process.

[0019] S3. The error accuracy of the printed green body is calculated based on the compensation method, and the Z-axis ball screw and the X-axis axial rotation motor of the worktable are driven to move the worktable upward to the specified position under the milling system. The milling system starts milling the printed product.

[0020] Preferably, the step S3 of calculating the error accuracy of the printed green body by using the compensation method specifically includes the following sub-steps:

[0021] S31. Perform error analysis on the composite processing equipment, including systematic error and random error of the composite processing equipment;

[0022] S32. Perform error analysis on the product to be processed, including the effects of the shape, size, temperature and pressure of the product to be processed on the error of the product to be processed;

[0023] S33. The errors of the composite processing equipment and the product to be processed are quantitatively calculated using the Bessel method. The mathematical expressions are as follows:

[0024] Where σ is the standard deviation of the measured error sample, X i is the measured error sample i, μ is the mean error of the measured samples, and n is the number of samples;

[0025] S34. Compensate the results based on the error analysis results of the composite processing equipment and the product to be processed. The compensation method is to modify the actual basic size to be equal to the sum of the basic size and the previous standard deviation of the composite processing equipment and the product to be processed, and output the modified actual basic size as the green product error accuracy.

[0026] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0027] (1) The present invention adopts a processing method that combines photocuring and milling, and utilizes the drive of the workbench on the Z-axis and X-axis rotation servo system, so that the product can switch back and forth between the two systems and perform reciprocating motion. The processed ceramic products are faster and consume less materials than traditional subtractive processes, and have higher precision and better appearance quality than additive manufacturing technology.

[0028] (2) The processing equipment and processing method of the present invention can not only be applied to products requiring high appearance quality, but also can be used to process ceramic parts with high-precision inner holes and complex structures, thereby ensuring the processing accuracy of special-shaped ceramic products.

[0029] (3) The key components of the present invention are connected by bolts, which is convenient for disassembly, maintenance and replacement, and for drives with high position accuracy requirements, synchronous drive is used to ensure accuracy and stability.

[0030] (4) The milling cutter of the present invention adopts hole-axis matching through hydraulic or pneumatic pressure when driven on the Z axis to ensure stability and reduce inertia to increase the upper limit of driving speed and ensure processing efficiency.

[0031] (5) The present invention provides a circular guide rail and an arc guide rail, and the driving gear of the milling device engages with the outer tooth profile of the circular guide rail and the arc guide rail respectively, which can better ensure the milling accuracy. At the same time, the circular guide rail, the arc guide rail and the shielding device combine the light curing system with the milling device, making the use of the entire composite processing equipment more convenient and greatly improving the working accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of the external structure of a light-curing and milling composite processing device for complex and special-shaped ceramic parts according to the present invention;

[0033] FIG2 is a second schematic diagram of the external structure of the light curing and milling composite processing equipment for complex and special-shaped ceramic parts according to the present invention;

[0034] FIG3 is a schematic diagram of a milling system according to the present invention;

[0035] FIG4 is a second schematic diagram of the milling system of the present invention;

[0036] FIG5 is a schematic diagram of a shielding device according to the present invention;

[0037] FIG6 is a second schematic diagram of the shielding device of the present invention;

[0038] FIG7 is a schematic structural diagram of a circular guide rail and an arc guide rail of a composite processing equipment using the present invention.

[0039] Main figure marks: 1. Milling system; 2. Milling guide rail; 21. Circular guide rail; 22. Arc guide rail; 3. Shielding device; 31. First shielding plate; 32. Second shielding plate; 4. Worktable Z-axis ball screw; 5. Worktable Z-axis slider; 6. Slurry tank; 7. Worktable Z-axis polished rod; 8. Motor support slider; 9. Worktable; 10. Light source system; 11. Drive housing; 12. Z-axis ball screw; 13. Z-axis threaded tube; 14. X-axis base; 15. Y-axis base; 16. Electric spindle clamp; 17. Z-axis drive motor; 18. Drive motor; 19. Z-axis light tube; 110. Z-axis polished rod; 111. X-axis drive motor; 112. Electric spindle; 113. Milling cutter; 114. Drive gear; 115. Transmission shaft; 301. Arc groove; 302. Groove. DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0041] Specifically, the present invention provides a light-curing and milling composite processing device for complex and special-shaped ceramic parts, as shown in Figures 1 to 7, which includes a milling system 1, a shielding device 3, a servo system and a light-curing system.

[0042] The milling system 1 includes a milling device and a milling guide 2. The milling guide 2 includes a circular guide 21 and an arcuate guide 22. The outer walls of the circular guide 21 and the arcuate guide 22 are both provided with an external tooth profile. The end of the arcuate guide 22 is fixedly connected to the upper surface of the circular guide by welding. The milling device meshes with the arcuate guide 22 and the circular guide 21 via gears and can slide along the arcuate guide 22 and the circular guide 21. A shielding device is provided between the milling system 1 and the light curing system. As shown in Figures 5 and 6, the shielding device 3 includes a first shielding plate 31 and a second shielding plate 32. The first shielding plate 31 and the second shielding plate 32 are arranged opposite each other, and an arcuate groove 301 is provided on the inner upper surface of the first shielding plate 31 and the second shielding plate 32. The circular guide 21 is placed in the arcuate groove 301. FIG5 shows a schematic diagram of the separation of the first baffle plate 31 and the second baffle plate 32, and FIG6 shows a schematic diagram of the first baffle plate 31 and the second baffle plate 32 after being spliced ​​together. In a specific application, as shown in FIG7 , the arc guide rail 22 is configured to be semicircular and is provided with two. The circular guide rail 21 serves as a carrier of the Z-axis rotational freedom, and the semicircular arc guide rail is connected to the circular guide rail 21 to provide the semicircular arc guide rail with the Z-axis rotational freedom. The milling system 1 engages with the semicircular arc guide rail and the circular guide rail through gears. The two semicircular arc guide rails are arranged in parallel with dual motors driving dual gears to ensure the stability of the milling operation process.

[0043] The light-curing system includes a light source system 10, a slurry tank 6, a worktable 9, a worktable Z-axis polished rod 7, a worktable Z-axis ball screw 4, and a worktable Z-axis slider 5. The worktable 9 has rotational displacement along the X-axis, and the worktable Z-axis polished rod 7 has translational displacement along the Z-axis. The first ends of the worktable Z-axis polished rod 7 and the worktable Z-axis slider 5 are mounted on the light source system 10. The second ends of the two worktable Z-axis polished rods 7 are connected to the lower surface of the first baffle 31. The second ends of the two worktable Z-axis polished rods 7 and the worktable Z-axis ball screw 4 are respectively connected to the lower surface of the second baffle 32. The slurry tank 6 is mounted above the light source system 10, and the worktable 9 is mounted above the slurry tank 6. A shielding device is mounted between the milling system 1 and the light-curing system. It uses a sealing mechanism similar to a clamp to prevent milling chips from falling into the light-curing system. A rubber gasket of appropriate thickness is added to the clamping area through a compensation method to increase service life and sealing performance.

[0044] The servo system includes a servo motor, a lead screw guide, and a motor support slider 8. The servo motor is located at the end of the lead screw guide. The lead screw guide passes through the worktable 9 and is connected at both ends to the motor support slider 8 and the worktable Z-axis slider 5, respectively. The motor support slider 8 and the worktable Z-axis slider 5 are both threadedly connected to the lead screw guide.

[0045] As shown in Figures 3 and 4, the milling device includes an electric spindle 112, a milling cutter, an electric spindle fixture 16, an X-axis base 14, an X-axis drive motor 111, a Y-axis base 15, a Y-axis drive motor, a Z-axis polished rod 110, a Z-axis polished tube 19, a Z-axis ball screw 12, a Z-axis threaded tube 13, a Z-axis drive motor 17, a drive housing 11, a drive motor 18, a drive gear 114 and a transmission shaft 115. The drive housing 11 is arranged outside the arc guide rail. Figure 4 shows a schematic diagram of the interior of the drive housing 11. The drive motor 18, the drive gear 114 and the transmission shaft 115 are all arranged inside the drive housing 11. The drive gear 114 is respectively engaged with the outer tooth profiles of the circular guide rail 21 and the arc guide rail 22, so that it can move on the circular guide rail 21 and the arc guide rail 22. The electric spindle fixture 16 is disposed outside the electric spindle 112 and is used to clamp and secure the electric spindle. The first end of the electric spindle 112 is connected to the output shafts of the X-axis drive motor 111, the Y-axis drive motor, and the Z-axis drive motor 17, respectively. The second end of the electric spindle 112 is connected to a milling cutter. The X-axis drive motor 111, the Y-axis drive motor, and the Z-axis drive motor 17 collectively drive the milling cutter to rotate and complete milling. In this embodiment, the milling cutter is a detachable milling cutter 113.

[0046] In a specific embodiment, the Z-axis ball screw 12 is arranged inside the Z-axis threaded tube 13. By driving the Z-axis ball screw 12 to rotate, the milling device can realize axial movement in space. The Z-axis light rod 110 is arranged in the Z-axis light tube 19 to reduce the error caused by the vibration of the device.

[0047] In the specific embodiment, grooves 302 are provided on the inner sides of the first shielding plate 31 and the second shielding plate 32 .

[0048] In a specific embodiment, the light curing system is provided with an X-axis axial rotation motor, which can rotate in the X-axis direction.

[0049] In a specific embodiment, a heating plate is provided at the bottom of the slurry tank 6 to provide heating during light curing.

[0050] On the other hand, the present invention also provides a processing method of a light curing and milling composite processing device for complex and special-shaped ceramic parts, which comprises the following steps:

[0051] S1. Set the servo system parameters. The servo system parameters include the motion parameters of the workbench and the motion path and motion rate of the milling cutter.

[0052] S2. Start working, heat the heating plate, and drive the Z-axis ball screw 4 of the workbench to move to a position m+1 set layer thickness distance from the bottom of the slurry tank. m is the number of cured layers. The light source system 10 starts working to cure the photosensitive resin layer above the workbench and form the first layer of the green body. It then floats up a certain distance and repeats the above steps to complete the printing process.

[0053] S3. The error accuracy of the printed green body is calculated according to the compensation method, and the Z-axis ball screw 4 of the workbench is driven to rotate so that the workbench 9 moves upward to the specified position under the milling system 1. The milling system 1 starts milling the printed product.

[0054] Preferably, the step S3 of calculating the error accuracy of the printed green body by using the compensation method specifically includes the following sub-steps:

[0055] S31. Perform error analysis on the composite processing equipment, including the systematic error and random error of the composite processing equipment.

[0056] S32. Conduct error analysis on the product to be processed, including the effects of the shape, size, temperature and pressure of the product to be processed on the error of the product to be processed.

[0057] S33. The errors of the composite processing equipment and the product to be processed are quantitatively calculated using the Bessel method. The mathematical expressions are as follows:

[0058] Where σ is the standard deviation of the measured error sample, X i is the measured error sample of i, μ is the mean error of the measured samples, and n is the number of samples.

[0059] S34. Compensate the results based on the error analysis results of the composite processing equipment and the product to be processed. The compensation method is to modify the actual basic size to be equal to the sum of the basic size and the previous standard deviation of the composite processing equipment and the product to be processed, and output the modified actual basic size as the green product error accuracy.

[0060] The working principle of the present invention is as follows:

[0061] The present invention is a composite processing equipment designed for some complex and special-shaped ceramic products that require high precision, high appearance quality and complex mechanical structure. During the working process, the pre-processed product is modeled and sliced, and then work begins. The servo system first drives the workbench Z-axis ball screw 4 to rotate the workbench Z-axis slider 5 and the motor support slider 8 to drive the workbench 9 to sink to the specified position, and then the light source system 10 starts to work. After the projection is cured, the workbench 9 floats up, and the process is repeated until the photocured green body is formed. The servo motor and the X-axis axial rotation motor operate simultaneously to make the workbench 9 face up and enter the milling system 1 for processing. At the same time, the shielding device runs and fits with the workbench 9 to start milling. After milling is completed, the set blowing device is operated to remove milling chips and residual slurry to obtain a milled green body. The green body can be subjected to secondary or multiple photocuring and milling alternating processes, or taken out for other post-processing processes, so as to obtain a ceramic product with high precision and good appearance quality.

[0062] The specific working process of the present invention is as follows:

[0063] S1. The servo system is pre-processed by CNC, including pre-setting the motion parameters of the workbench 9, the motion path and motion rate of the milling cutter 113.

[0064] S2. Start working, heat up the heating plate, drive the Z-axis ball screw of the workbench to the specified position. In this embodiment, it moves to a position m+1 set layer thickness distance away from the bottom of the slurry tank. The light source system 10 starts working to solidify the photosensitive resin layer above the workbench 9 and form the first layer of the green body. Then it floats up a certain distance and repeats the above steps to complete the entire printing process.

[0065] S3. The error accuracy of the printed green body can be calculated based on the compensation method. The Z-axis ball screw and the X-axis axial rotation motor of the worktable are driven to move the worktable 9 upward to the specified position under the milling system 1. The milling system 1 begins to mill the boundaries, inner holes, grooves and other areas of the product where there are accuracy problems.

[0066] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A light curing and milling composite processing equipment for complex and special-shaped ceramic parts, characterized by: It includes a milling system, a masking device, a light curing system and a servo system; The milling system includes a milling device and a milling guide rail. The milling guide rail includes a circular guide rail and a curved guide rail. The outer walls of the circular guide rail and the curved guide rail are both provided with an external tooth profile. The end of the curved guide rail is fixedly connected to the upper surface of the circular guide rail by welding. The milling device meshes with the curved guide rail and the circular guide rail through gears and can slide along the curved guide rail and the circular guide rail. The shielding device is provided between the milling system and the light curing system. The shielding device includes a first shielding plate and a second shielding plate, the first shielding plate and the second shielding plate are arranged opposite to each other, and an arc-shaped groove is opened on the inner upper surface of the first shielding plate and the second shielding plate, and the circular guide rail is placed in the arc-shaped groove; The light curing system includes a light source system, a slurry tank, a workbench, a Z-axis polished rod for the workbench, a Z-axis ball screw for the workbench, and a Z-axis slider for the workbench; the workbench has an X-axis rotational displacement, and the Z-axis polished rod for the workbench has a Z-axis translational displacement; the first ends of the Z-axis polished rod and the Z-axis slider for the workbench are arranged on the light source system, the second ends of the two Z-axis polished rods for the workbench are connected to the lower surface of the first baffle plate, and the second ends of the two Z-axis polished rods and the Z-axis ball screw for the workbench are respectively connected to the lower surface of the second baffle plate; the slurry tank is arranged above the light source system, and the workbench is arranged above the slurry tank; The servo system includes a servo motor, a lead screw guide rail, and a motor support slider. The servo motor is arranged at the end of the lead screw guide rail in the extension direction. The lead screw guide rail passes through the workbench and is connected to the motor support slider and the workbench Z-axis slider at both ends. The motor support slider and the workbench Z-axis slider are both threadedly connected to the lead screw guide rail. The milling device includes an electric spindle, a milling cutter, an electric spindle fixture, an X-axis base, an X-axis drive motor, a Y-axis base, a Y-axis drive motor, a Z-axis polished rod, a Z-axis optical tube, a Z-axis ball screw, a Z-axis threaded tube, a Z-axis drive motor, a drive housing, a drive motor, a drive gear and a transmission shaft. The Z-axis ball screw is arranged in the Z-axis threaded tube, and the milling device is driven to rotate to achieve axial movement in space. The Z-axis polished rod is arranged in the Z-axis optical tube to reduce the error caused by vibration of the device. The drive housing is arranged outside the arc guide rail, and the drive motor, drive gear and transmission shaft are all arranged inside the drive housing. The drive gear is respectively engaged with the outer tooth profiles of the circular guide rail and the arc guide rail. The electric spindle fixture is arranged outside the electric spindle and is used to clamp and fix the electric spindle. One end of the electric spindle is connected to the milling cutter, which drives the milling cutter to rotate to complete milling.

2. The light curing and milling composite processing equipment for complex and special-shaped ceramic parts according to claim 1 is characterized in that: A heating plate is provided at the bottom of the slurry tank.

3. The light curing and milling composite processing equipment for complex and special-shaped ceramic parts according to claim 1 is characterized in that: The arc-shaped guide rails are semicircular and two are provided.

4. The light curing and milling composite processing equipment for complex and special-shaped ceramic parts according to claim 1 is characterized in that: Grooves are provided on inner sides of the first shielding plate and the second shielding plate.

5. The light curing and milling composite processing equipment for complex and special-shaped ceramic parts according to claim 2 is characterized in that: The light curing system is provided with an X-axis axial rotation motor.

6. A processing method based on the light curing and milling composite processing equipment of complex and special-shaped ceramic parts according to claim 5, characterized in that: It includes the following steps: S1. Setting servo system parameters, which include the motion parameters of the workbench and the motion path and motion rate of the milling cutter; S2: Start working, the heating plate heats up, and the servo motor drives the Z-axis ball screw of the workbench to a position m+1 set layer thickness distance from the bottom of the slurry tank, where m is the number of cured layers. The light source system starts working to cure the photosensitive resin layer above the workbench and form the first layer of the green body. The green body then floats up a certain distance and repeats the above steps to complete the printing process. S3. The error accuracy of the printed green body is calculated based on the compensation method, and the Z-axis ball screw and the X-axis axial rotation motor of the worktable are driven to move the worktable upward to the specified position under the milling system. The milling system starts milling the printed product.

7. The processing method according to claim 6, characterized in that: The calculation of the error accuracy of the printed green body by using the compensation method in step S3 specifically includes the following sub-steps: S31. Perform error analysis on the composite processing equipment, including systematic error and random error of the composite processing equipment; S32. Perform error analysis on the product to be processed, including the effects of the shape, size, temperature and pressure of the product to be processed on the error of the product to be processed; S33. The errors of the composite processing equipment and the product to be processed are quantitatively calculated using the Bessel method. The mathematical expressions are as follows: Where σ is the standard deviation of the measured error sample, X i is the measured error sample i, μ is the mean error of the measured samples, and n is the number of samples; S34. Compensate the results based on the error analysis results of the composite processing equipment and the product to be processed. The compensation method is to modify the actual basic size to be equal to the sum of the basic size and the previous standard deviation of the composite processing equipment and the product to be processed, and output the modified actual basic size as the green product error accuracy.

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