A light-curing assisted direct writing and milling composite manufacturing device and method

Abstract

The application relates to a light-curing auxiliary direct writing and milling composite manufacturing device and method, which comprises a frame body, a two-axis linkage mechanism arranged at the top of the frame body, a supporting piece connected with the two-axis linkage mechanism, a printing platform connected with a lifting mechanism arranged below the supporting piece, a light-curing auxiliary direct writing mechanism arranged on one side of the supporting piece, and a milling mechanism arranged on the other side of the supporting piece. The light-curing auxiliary direct writing mechanism comprises a material cylinder fixed with the supporting piece, an extruding mechanism connected with the top of the material cylinder, and one end of a discharging pipe connected with the bottom of the material cylinder. The other end of the discharging pipe serves as a direct writing discharging end. A direct writing inner pipe is coaxially arranged at the direct writing discharging end of the discharging pipe. The top end of the direct writing inner pipe is connected with the emitting port of a direct laser generator. The laser generator is fixed on the supporting piece. The manufacturing device has high workpiece quality.

Description

Technical Field

[0001] This invention relates to the field of additive and subtractive manufacturing composite processing technology, specifically to a photopolymerization-assisted direct writing and milling composite manufacturing apparatus and method. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] In modern manufacturing, with increasingly complex product structures and ever-increasing functional requirements, traditional single additive or subtractive manufacturing technologies are no longer sufficient to meet production demands. While additive manufacturing (such as 3D printing) can create complex shapes, it has certain limitations in terms of precision and surface quality; subtractive manufacturing (such as milling) can guarantee high precision and good surface quality, but it is less efficient and more costly when manufacturing complex internal structures.

[0004] Photopolymer 3D printing technology utilizes the principle of photosensitive resin curing under light irradiation to create parts with a certain degree of precision and complexity. However, during the manufacturing process, due to factors such as the characteristics of light propagation and resin curing shrinkage, problems such as insufficient molding accuracy and dimensional deviations in parts may occur. While direct writing technology can achieve precise material deposition, it is difficult to meet the requirements for some parts that require high-precision surfaces and complex shapes using direct writing technology alone. Currently, there are photopolymer-assisted direct writing technologies based on both, but both involve extruding slurry and curing it under external irradiation. The degree and effect of curing are severely affected by laser power and extrusion diameter, resulting in uneven curing and anisotropy in the workpiece, which affects workpiece quality. Milling has advantages in improving the surface quality and precision of parts, but it cannot efficiently construct complex internal structures. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a photopolymerization-assisted direct writing and milling composite manufacturing device and method, which improves the processing quality of workpieces.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide a photopolymerization-assisted direct writing and milling composite manufacturing apparatus, comprising a frame, a two-axis linkage mechanism at the top of the frame, the two-axis linkage mechanism being connected to a support member, a printing platform connected to a lifting mechanism at the bottom of the support member, a photopolymerization-assisted direct writing mechanism on one side of the support member, and a milling mechanism on the other side, the photopolymerization-assisted direct writing mechanism comprising a material cylinder fixed to the support member, the top of the material cylinder being connected to an extrusion mechanism, the bottom of the material cylinder being connected to one end of an outlet pipe, the other end of the outlet pipe serving as a direct writing outlet, a direct writing inner tube being coaxially arranged inside the direct writing outlet of the outlet pipe, the top end of the direct writing inner tube being connected to the emission port of a laser generator, and the laser generator being fixed on the support member.

[0008] Optionally, the extrusion mechanism includes a plunger head located inside the barrel, the plunger head being slidably connected to the barrel, the plunger head being connected to a drive mechanism to drive the plunger head to move along the axial direction of the barrel, the plunger head passing through a feeding hose, and the feeding hose communicating with the space inside the barrel below the plunger head.

[0009] Optionally, the feeding hose is equipped with a first one-way valve so that the slurry can only flow in the direction toward the inside of the cylinder.

[0010] Optionally, a second one-way valve is installed on the discharge pipe so that the slurry can only flow towards the direct discharge end.

[0011] Optionally, the drive mechanism includes a rack, which is slidably connected to a support member, with the bottom end of the rack connected to a plunger head, the rack meshing with a gear, and the gear connected to a rotating drive member fixed to the support member.

[0012] Optionally, one side of the rack meshes with a gear, and the other side is provided with a guide wheel. The guide wheel is rotatably connected to the support member, and the guide wheel slides against the rack.

[0013] Optionally, the milling mechanism includes a milling spindle, which is connected to a power mechanism. The power mechanism is connected to a lead screw lifting mechanism mounted on a support. A milling cutter is connected to the bottom end of the milling head.

[0014] Optionally, the milling cutter is provided with a cleaning mechanism on one side and a dust collection mechanism on the other side.

[0015] In a second aspect, embodiments of the present invention provide a method of operating the photopolymerization-assisted direct writing and milling composite manufacturing apparatus described in the first aspect, comprising alternating photopolymerization direct writing additive processing and milling reduction processing;

[0016] During photopolymerization direct-write additive manufacturing, the two-axis linkage mechanism drives the support components to move, the printing platform moves in coordination with the lifting mechanism, the extrusion mechanism and the laser generator work, the extrusion mechanism extrudes the slurry from the direct-write outlet end of the discharge tube, and the laser emitted by the laser generator guides the continuously extruded slurry to a set distance to solidify the slurry, and gradually solidifies it layer by layer.

[0017] During milling and cutting, the two-axis linkage mechanism drives the support component to move, and the printing platform moves in coordination with the lifting mechanism. The milling mechanism performs milling and cutting on the solidified parts.

[0018] Optionally, the laser generator has a power of 5-50W and the emitted laser beam has a wavelength of 355-405nm.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The composite manufacturing apparatus of the present invention includes a discharge pipe with an inner tube for direct writing. The top end of the inner tube is connected to the emission port of a laser generator. The laser generator can emit a high-energy laser beam. The direct writing slurry is evenly distributed around the high-energy laser beam. The slurry is delivered from the discharge end of the lower discharge pipe. The high-energy beam passes through the inner tube and irradiates the center of the extruded slurry. Through the light-guiding property of the slurry (total reflection of the laser in the slurry), the slurry is cured by internal irradiation along the slurry path. Compared with external irradiation curing, the curing effect is more uniform, and the workpiece has no anisotropy of the plane, thus improving the quality of the workpiece.

[0021] 2. The composite manufacturing apparatus of the present invention is further provided with a milling mechanism, which organically combines photopolymerization, direct writing and milling technologies, giving full play to their respective advantages, and can efficiently process complex internal structures of components, thereby improving the precision, efficiency and quality of parts manufacturing. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the processing mechanism in Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the photopolymerization-assisted direct writing mechanism in Embodiment 1 of the present invention. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the photopolymerization-assisted direct writing mechanism in Embodiment 1 of the present invention. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the milling mechanism in Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram illustrating the principle of internal irradiation curing of the slurry in Embodiment 1 of the present invention;

[0029] The components are as follows: 1. Frame, 2. Support plate, 3. Machining mechanism, 4. Printing platform, 5. Material cylinder, 6. Discharge pipe, 7. Plunger head, 8. Feed hose, 9. Rack, 10. Gear, 11. Guide wheel, 12. Rotary drive motor, 13. First check valve, 14. Fixing clip, 15. Laser generator, 16. High-energy laser beam, 17. Direct writing inner tube, 18. Slurry, 19. Second check valve, 20. Housing, 21. Power mechanism, 22. Milling cutter, 23. Lifting motor, 24. Lifting screw, 25. Lifting plate, 26. Cleaning mechanism, 27. Dust collection mechanism. Detailed Implementation

[0030] Example 1

[0031] This embodiment provides a photopolymerization-assisted direct writing and milling composite manufacturing apparatus, such as... Figures 1-2 As shown, the device includes a frame 1, with a two-axis linkage mechanism on the top of the frame 1. The two-axis linkage mechanism is a horizontal two-axis linkage mechanism connected to a support member, which can drive the support member to move in two mutually perpendicular directions in the horizontal plane. In this embodiment, the support member is a support plate 2, and a processing mechanism 3 is fixed on the support plate 2. The processing mechanism 3 includes a photocuring assisted direct writing mechanism and a milling mechanism. The photocuring assisted direct writing mechanism is installed on one side of the support plate 2, and the milling mechanism is fixed on the other side of the plate. The photocuring assisted direct writing mechanism is used for photocuring assisted direct writing additive processing, and the milling mechanism is used for milling and reducing material processing. A printing platform 4 is provided below the support member, and the printing platform 4 is connected to a lifting mechanism, which can move up and down under the drive of the lifting mechanism.

[0032] In this embodiment, the horizontal two-axis linkage mechanism can adopt the existing horizontal two-axis linkage mechanism structure of the 3D direct writing printing device, and the horizontal two-axis linkage mechanism is equipped with monitoring components such as displacement sensors and proximity switches. Existing equipment can be used, and will not be described in detail here.

[0033] The printing platform 4 adopts an existing printing platform capable of temperature control. The printing platform is equipped with a heating element and a temperature sensor, which can regulate the temperature of the printing platform.

[0034] The printing platform 4 provides multifaceted support for the printing process. Its stable characteristics lay a solid foundation for model printing, effectively preventing model shaking, displacement, and deformation, and ensuring stable adhesion. Furthermore, the printing platform can precisely control the temperature according to the characteristics of different direct-write materials, enhancing the adhesion between the material and the platform and reducing model warping and shrinkage. In addition, the highly flat surface ensures a smooth and even bottom for the model, reducing subsequent processing costs.

[0035] The printing platform 4 is connected to the lifting mechanism, which can be an existing screw lifting mechanism.

[0036] The horizontal two-axis linkage mechanism, lifting mechanism, heating element, etc. are all connected to the control system and can receive instructions from the control system to work. The displacement sensor, temperature sensor and proximity switch are all connected to the control system and can send signals to the control system.

[0037] The control system is the core of the entire printing device. It receives feedback information from multiple sensors, including displacement sensors, temperature sensors, and limit switches, and comprehensively regulates the operating parameters of the photo-guided curing-assisted direct writing mechanism, the milling mechanism, and the printing platform based on this data. According to the preset printing model and the characteristic parameters of the direct writing paste, the control system precisely controls the movement trajectory of the photo-guided curing-assisted direct writing mechanism and the milling mechanism, the extrusion speed of the direct writing paste, the milling path and depth, and the temperature of the printing platform. This ensures the high efficiency, stability, and high precision of the entire printing and milling process, enabling composite manufacturing of additive and subtractive materials through photo-guided curing-assisted direct writing and milling.

[0038] The structure and working method of the horizontal two-axis linkage mechanism, lifting mechanism and printing platform can be based on existing technology, and will not be described in detail here.

[0039] like Figures 3-4 As shown, the photocuring-assisted direct writing mechanism includes a material cylinder 5 fixed on the side plate of the support plate. The axis of the material cylinder 5 is vertically arranged. The top end of the material cylinder 5 is connected to an extrusion mechanism. The bottom end of the material cylinder 5 is connected to the inlet end of the discharge pipe 6. The other end of the discharge pipe 6 serves as the direct writing outlet end.

[0040] The extrusion mechanism includes a plunger head 7 located inside the material cylinder 5. The plunger head 7 is slidably connected to the material cylinder 5 and can move along the axial direction of the material cylinder 5. The plunger head 7 passes through a feeding hose 8. The discharge end of the feeding hose 8 is connected to the internal space of the material cylinder 5 below the plunger head 7. The other end of the feeding hose 8 is connected to a storage tank through a filter device and a material pump. The storage tank is used to store large quantities of direct writing slurry. It is equipped with a stirring device inside. The stirring device can use existing equipment and will not be described in detail here. The filter device filters out impurities from the direct writing slurry in the storage tank and then flows into the material cylinder 5 through the feeding hose 8.

[0041] The plunger head 7 is connected to a drive mechanism located above the material cylinder 5 and mounted on the support plate 2. The drive mechanism is used to drive the plunger head to move along the axial direction of the material cylinder.

[0042] In this embodiment, the driving mechanism includes a rack 9, which is slidably connected to the support 2. The bottom end of the rack 9 is fixed to the top surface of the plunger head 7. One side of the rack 9 has a tooth structure and meshes with the gear 10. The other side of the rack 9 is a plane and slides in contact with the wheel surface of the guide wheel 11. The guide wheel 11 is rotatably connected to the support plate and is used to guide the movement of the rack 9.

[0043] The gear 10 is connected to a rotation drive component fixed on the support plate 2, and the rotation drive component is used to drive the rotation of the gear.

[0044] In this embodiment, the rotation drive component is a rotation drive motor 12. The housing of the rotation drive motor 12 is fixed on the plate surface of the support plate 2 on which the milling mechanism is mounted. The output shaft of the rotation drive motor 12 is connected to the gear 10 and can drive the gear 10 to rotate.

[0045] Under the meshing action of gear 10 and rack 9, rack 9 can drive plunger head 7 to move along the axial direction of barrel 5.

[0046] Furthermore, the feeding hose 8 is provided with a first one-way valve 13, which is fixed to the support plate 2 by a fixing clip 14 and located above the material cylinder 5. The first one-way valve 13 only allows the slurry to flow in the direction of the material cylinder.

[0047] The fixing clip 14 can be made using existing components, and will not be described in detail here.

[0048] The bottom end of the material cylinder 5 is connected to one end of the discharge pipe 6. The discharge pipe 6 is set at a set acute angle relative to the vertical direction, and the bottom end of the discharge pipe 6 is set along the vertical direction as the straight discharge end.

[0049] A laser generator 15 is located directly above the direct writing outlet end. The laser generator 15 can emit a high-energy laser beam 16. The laser generator 15 is equipped with a laser energy sensor, which is connected to the control system. The emission port of the laser generator 15 is connected to the top of the direct writing inner tube 17. The bottom end of the direct writing inner tube 17 extends into the direct writing outlet end of the discharge pipe 6 and is coaxially arranged with the direct writing outlet end. With this arrangement, the slurry 18 flows out from the outer periphery of the direct writing inner tube 17.

[0050] The discharge pipe 6 evenly distributes the direct-write slurry around the high-energy laser beam 16, and the slurry 18 is delivered from the lower direct-write discharge end. The laser generator 15 generates a high-energy laser beam, and the high-energy laser beam 16 directly irradiates the center of the extruded slurry 18 through the laser composite direct-write extrusion module. Through the light-guiding property of the slurry 18 (total reflection of the laser in the slurry), the slurry is irradiated and cured along the path of the slurry 18.

[0051] The rotating drive motor 12 drives the gear 10 to rotate, and the rack 9 can drive the plunger head 7 to move inside the barrel 5, thereby extruding the slurry in the barrel 5 to the discharge pipe. By rotating the drive motor 12 and controlling the gear 10 and rack 9, the extrusion amount of the slurry during direct writing can be precisely controlled.

[0052] Furthermore, a second one-way valve 19 is installed on the discharge pipe 6 and fixed to the support plate. The second one-way valve 19 only allows the slurry 18 to flow in the direction of the direct discharge end. The second one-way valve 19 is fixedly connected to the support plate 2 by a fixing clip.

[0053] Furthermore, the inner tube 17 and the discharge tube 6 are located inside a housing 20, and the housing 20 is fixedly connected to the support plate 2.

[0054] like Figure 5 As shown, the milling mechanism includes a milling spindle, which is connected to a power mechanism 21. The power mechanism 21 can drive the milling spindle to rotate. A milling cutter 22 is connected to the bottom end of the milling spindle. The power mechanism 21 can be any existing equipment and will not be described in detail here. The power mechanism 21 is connected to a lead screw lifting mechanism installed on the support plate 2. The lead screw lifting mechanism can drive the power mechanism 21, the milling spindle and the milling cutter 22 to move up and down.

[0055] The milling spindle drives the milling cutter to rotate at high speed to perform milling operations in order to achieve the purpose of material reduction.

[0056] The lead screw lifting mechanism is driven by a lifting motor 23 fixed on the top of the support plate. The lifting motor 23 is connected to the lifting lead screw 24, the lifting lead screw 24 is connected to the lifting plate 25, the lifting plate 25 is slidably connected to the support plate 2, and the lifting motor 23 is connected to the power mechanism 21 through the lifting lead screw 24. During additive manufacturing, the power mechanism 21 is raised, and during subtractive manufacturing, the power mechanism 21 is lowered to complete the alternation of direct writing additive manufacturing and milling subtractive manufacturing.

[0057] The milling cutter 22 has a cleaning mechanism 26 on one side and a dust collection mechanism 27 on the other side. The cleaning mechanism 26 includes a nozzle fixed to the support plate 2 and facing the milling cutter. The nozzle is connected to an air pump via an air pipe. The dust collection mechanism 27 includes a dust collection hood fixed to the support plate 2 and connected to a suction pump via a dust collection pipe. The cleaning mechanism performs the purpose of air cleaning during subtractive manufacturing. The dust collection mechanism sucks up the removed material during subtractive air cleaning, avoiding the impact of milling chips on subsequent direct-write additive manufacturing.

[0058] like Figure 6 As shown, in the manufacturing apparatus of this embodiment, the high-energy laser beam 16 irradiates the center of the extruded slurry 18 through the direct writing inner tube 17. Through the light guidance of the slurry 18 (total reflection of the laser in the slurry), the slurry is cured by internal irradiation along the slurry path. Compared with external irradiation curing, the curing effect is more uniform, and the workpiece does not have anisotropy of the plane, which improves the quality of the workpiece. Moreover, the photocuring, direct writing and milling technologies are organically combined to give full play to their respective advantages and improve the precision, efficiency and quality of parts manufacturing.

[0059] Example 2

[0060] This embodiment provides a working method for the photopolymerization-assisted direct writing and milling composite manufacturing apparatus described in Embodiment 1, including alternating photopolymerization direct writing additive processing and milling reduction processing;

[0061] During photopolymerization direct-write additive manufacturing, the two-axis linkage mechanism drives the support components to move, the printing platform moves in coordination with the lifting mechanism, the extrusion mechanism and the laser generator work, the extrusion mechanism extrudes the slurry from the direct-write outlet end of the discharge tube, and the laser emitted by the laser generator guides the continuously extruded slurry to a set distance to solidify the slurry, and gradually solidifies it layer by layer.

[0062] Then, during the milling and cutting process, the two-axis linkage mechanism drives the support component to move, and the printing platform moves in coordination with the lifting mechanism. The milling mechanism performs milling and cutting on the solidified parts.

[0063] Alternate between photopolymerization direct writing additive manufacturing and milling cutting until the workpiece is finished.

[0064] Specifically:

[0065] Before machining, the operator imports the 3D model data into the control system. The system analyzes the model and plans the machining paths and parameters for direct cutting and milling.

[0066] During processing, the photocuring direct writing mechanism extrudes the slurry at a stable flow rate, and the laser guides the continuously extruded slurry to a set distance to cure the slurry, gradually curing it layer by layer.

[0067] After a portion of the photopolymer-assisted direct writing is completed, the milling mechanism is activated. The printing platform moves to the set position to perform the milling process.

[0068] During the processing, the control system monitors and collects data from various sensors in real time, and dynamically adjusts the slurry extrusion speed, laser energy, milling parameters and motion trajectory to ensure processing accuracy and quality, and achieve high-precision printing.

[0069] Photopolymerization direct writing additive manufacturing and milling / reduction machining are performed alternately until the workpiece is completed.

[0070] In this embodiment, the printing platform temperature can be adjusted within the range of 15-85℃. The printing speed is between 1-10 mm / s. The printing height (distance between the straight ejector end and the printing platform or substrate) is between 0.1-5 mm, and the ejector tube diameter is 0.05 mm, 0.1 mm, or 0.15 mm. The laser beam emitted by the laser generator has a wavelength of 355-405 nm, and the laser generator power is 5-50 W. The light guidance accuracy can reach ±5 μm.

[0071] During milling, the spindle speed is 1000-15000 r / min.

[0072] The printing platform has a positioning accuracy of ±10μm and a repeatability of ±5μm. The maximum processing size is length × width × height = 260mm × 260mm × 210mm.

[0073] In one practical application of this embodiment, the method for manufacturing automotive parts includes the following steps:

[0074] Equipment Assembly and Debugging: Assemble strictly according to the equipment design drawings, ensuring all components are securely installed and accurately connected. After assembly, perform sealing and flow tests on the direct-write system to ensure no damage to any components. Adjust the wavelength and power of the laser generator and calibrate the laser path to ensure the light guidance accuracy meets requirements. Select and install suitable milling cutters, and simultaneously test the spindle speed and adjust the positioning accuracy of the milling table.

[0075] Material Preparation: Select a direct-write slurry suitable for automotive parts manufacturing. Pour the slurry into the storage tank, turn on the filtration and stirring devices to ensure the material is uniform and free of impurities. Simultaneously, fill the entire feed hose and extrusion device with the slurry.

[0076] Machining Operation: A 3D model of an automotive engine part is imported into the control system. The laser wavelength is set to 365nm, power to 15W, and direct-write layer thickness to 0.1mm. During the photopolymerization process, the system adjusts the direct-write path in real time based on the model. After 50% of the direct-write curing is complete, the milling mechanism is activated. The milling spindle speed is set to 5000r / min, and the printing platform positioning accuracy to ±10μm, to perform milling on the part. During machining, the control system adjusts various parameters in real time based on sensor data.

[0077] Quality Inspection: After machining, the parts are inspected for dimensional accuracy and surface quality. The inspection revealed that the dimensional accuracy of the parts reaches ±0.05mm, and the surface roughness Ra is 0.8μm, which meets the manufacturing standards for automotive engine parts.

[0078] In another practical application of this embodiment, the manufacture of a medical device includes the following steps:

[0079] Equipment preparation: Check the operating status of each system of the equipment, and clean and maintain key components. Adjust the wavelength and power of the laser generator, calibrate the laser path, and select and install a suitable milling cutter.

[0080] Material selection and processing: Select a direct-write slurry for medical device manufacturing. Pre-treat the material according to the specifications and adjust its viscosity.

[0081] Processing Procedure: The customized 3D model of the dental implant is imported into the monitoring and control system. The laser wavelength is set to 385nm, power to 20W, and the cured layer thickness to 0.08mm. After curing, the milling mechanism begins operation. The milling spindle speed is set to 8000r / min, and the printing platform positioning accuracy to ±10μm, to mill the implant. During processing, the processing parameters are optimized in real time based on monitoring data.

[0082] Quality Assessment: After processing, the dental implants undergo a quality assessment. The implant dimensional accuracy reaches ±0.03mm, and the surface roughness Ra is 0.6μm, meeting the high-precision manufacturing requirements of medical devices.

[0083] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A photopolymerization-assisted direct writing and milling composite manufacturing device, comprising a frame, a two-axis linkage mechanism at the top of the frame, the two-axis linkage mechanism being connected to a support member, and a printing platform connected to a lifting mechanism below the support member, characterized in that... One side of the support is equipped with a photocuring-assisted direct writing mechanism, and the other side is equipped with a milling mechanism. The photocuring-assisted direct writing mechanism includes a barrel fixed to the support. The top of the barrel is connected to the extrusion mechanism, and the bottom is connected to one end of the discharge pipe. The other end of the discharge pipe serves as the direct writing discharge end. A direct writing inner tube is coaxially arranged inside the direct writing discharge end of the discharge pipe, and the slurry flows out from the outer periphery of the direct writing inner tube. The top of the direct writing inner tube is connected to the emission port of a laser generator, and the laser generator is fixed on the support. The laser emitted by the laser generator irradiates the center of the extruded slurry through the direct writing inner tube. Through the light guiding property of the slurry, that is, the total reflection of the laser in the slurry, the internal irradiation curing of the slurry is completed along the slurry path.

2. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 1, characterized in that, The extrusion mechanism includes a plunger head located inside the barrel, the plunger head being slidably connected to the barrel, and the plunger head being connected to a drive mechanism to drive the plunger head to move along the axial direction of the barrel. The plunger head passes through a feeding hose, and the feeding hose is in communication with the space inside the barrel below the plunger head.

3. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 2, characterized in that, The feeding hose is equipped with a first one-way valve so that the slurry can only flow in the direction toward the inside of the cylinder.

4. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 1, characterized in that, A second one-way valve is installed on the discharge pipe so that the slurry can only flow towards the direct discharge end.

5. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 2, characterized in that, The drive mechanism includes a rack that is slidably connected to a support member, the bottom end of the rack being connected to a plunger head, the rack meshing with a gear, and the gear being connected to a rotating drive member fixed to the support member.

6. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 5, characterized in that, One side of the rack meshes with a gear, and the other side is provided with a guide wheel. The guide wheel is rotatably connected to the support member, and the guide wheel slides against the rack.

7. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 1, characterized in that, The milling mechanism includes a milling spindle, which is connected to a power mechanism. The power mechanism is connected to a lead screw lifting mechanism installed on a support. A milling cutter is connected to the bottom end of the milling head.

8. The photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 7, characterized in that, The milling cutter is equipped with a cleaning mechanism on one side and a dust collection mechanism on the other side.

9. A method of operating the photopolymerization-assisted direct writing and milling composite manufacturing apparatus according to any one of claims 1-8, characterized in that: This includes alternating photopolymerization direct-write additive manufacturing and milling and cutting processes; During photopolymerization direct-write additive manufacturing, the two-axis linkage mechanism drives the support components to move, the printing platform moves in coordination with the lifting mechanism, the extrusion mechanism and the laser generator work, the extrusion mechanism extrudes the slurry from the direct-write outlet end of the discharge tube, and the laser emitted by the laser generator guides the continuously extruded slurry to a set distance to solidify the slurry, and gradually solidifies it layer by layer. During milling and cutting, the two-axis linkage mechanism drives the support component to move, and the printing platform moves in coordination with the lifting mechanism. The milling mechanism performs milling and cutting on the solidified parts.

10. The operating method of the photopolymerization-assisted direct writing and milling composite manufacturing apparatus as described in claim 9, characterized in that, The laser generator has a power of 5-50W and emits a laser beam with a wavelength of 355-405nm.

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