Photocuring auxiliary direct writing and milling composite manufacturing device and method

Abstract

The invention relates to a photocuring auxiliary direct writing and milling composite manufacturing device and method.The photocuring auxiliary direct writing and milling composite manufacturing device comprises a frame body, a two-axis linkage mechanism is arranged at the top of the frame body and connected with a supporting piece, a printing platform connected with a lifting mechanism is arranged below the supporting piece, a photocuring auxiliary direct writing mechanism is arranged on one side of the supporting piece, and a milling mechanism is arranged on the other side of the supporting piece; the photocuring auxiliary direct writing mechanism comprises a material barrel fixed to the supporting piece, the top of the material barrel is connected with the material extruding mechanism, the bottom of the material barrel is connected with one end of a discharging pipe, the other end of the discharging pipe serves as a direct writing discharging end, a direct writing channel inner pipe is coaxially arranged at the direct writing discharging end of the discharging pipe, and the top end of the direct writing channel inner pipe is connected with an emitting opening of a direct laser generator. The laser generator is fixed to the supporting piece. Workpieces manufactured through the manufacturing device are high in quality.

Description

Technical Field

[0001] The present invention relates to the technical field of additive and subtractive manufacturing composite processing, and particularly relates to a device and method for composite manufacturing of photocuring-assisted direct writing and milling. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] In modern manufacturing, with the increasing complexity of product structures and the continuous improvement of functional requirements, traditional single additive manufacturing or subtractive manufacturing technologies are difficult to meet production needs. Additive manufacturing (such as 3D printing) can manufacture complex shapes, but there are certain limitations in terms of accuracy and surface quality; subtractive manufacturing (such as milling) can ensure high precision and good surface quality, but it is inefficient and costly in manufacturing complex internal structures.

[0004] The photocuring 3D printing technology uses the principle that photosensitive resin cures and forms under light irradiation, and can manufacture parts with a certain degree of accuracy and complexity. However, during the manufacturing process, due to factors such as light propagation characteristics and resin curing shrinkage, problems such as insufficient forming accuracy and part size deviation will occur. Although the direct writing technology can achieve precise deposition of materials, for some parts that require high-precision surfaces and complex shapes, it is difficult to meet the requirements when using the direct writing technology alone. Currently, there is a photocuring-assisted direct writing technology proposed based on the two, but in all of them, the extruded slurry is cured by external irradiation, and the curing degree and effect are severely affected by the laser power and extrusion diameter, the curing effect is uneven, the workpiece has planar anisotropy, which affects the quality of the workpiece. Milling has advantages in improving the surface quality and accuracy of parts, but it cannot efficiently construct complex internal structures. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a device and method for composite manufacturing of photocuring-assisted direct writing and milling, which improves the processing quality of workpieces.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a light-curing assisted direct writing and milling composite manufacturing device, which includes a frame body. A two-axis linkage mechanism is provided at the top of the frame body. The two-axis linkage mechanism is connected to a support member. A printing platform connected to a lifting mechanism is provided below the support member. A light-curing assisted direct writing mechanism is provided on one side of the support member, and a milling mechanism is provided on the other side. The light-curing assisted direct writing mechanism includes a material cylinder fixed to the support member. The top of the material cylinder is connected to a material extrusion mechanism, and the bottom is connected to one end of a 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. The top end of the direct writing inner tube is connected to the emission port of a direct laser generator, and the laser generator is fixed on the support member.

[0008] Optionally, the material extrusion mechanism includes a plunger head located inside the material cylinder. The plunger head is slidably connected to the material cylinder. The plunger head is connected to a driving mechanism to drive the plunger head to move along the axis direction of the material cylinder. A feeding hose passes through the plunger head, and the feeding hose is communicated with the inner space of the material cylinder below the plunger head.

[0009] Optionally, a first one-way valve is provided on the feeding hose so that the slurry can only flow in the direction towards the inside of the material cylinder.

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

[0011] Optionally, the driving mechanism includes a rack. The rack is slidably connected to the support member. The bottom end of the rack is connected to the plunger head. The rack is engaged with a gear, and the gear is connected to a rotational driving member fixed on the support member.

[0012] Optionally, one side of the rack is engaged with the gear, and a guide wheel is provided on the other side. The guide wheel is rotatably connected to the support member, and the guide wheel is slidably attached to the rack.

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

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

[0015] In a second aspect, an embodiment of the present invention provides a working method for the light-curing assisted direct writing and milling composite manufacturing device described in the first aspect, which includes alternately performing light-curing direct writing additive manufacturing and milling subtractive manufacturing;

[0016] During the light-curing direct writing additive manufacturing process, the two-axis linkage mechanism drives the support member to move, and the printing platform moves in coordination under the drive of the lifting mechanism. The material extrusion mechanism and the laser generator operate. The material extrusion mechanism extrudes the slurry from the direct writing discharge end of the discharge pipe, and the laser emitted by the laser generator is guided by the continuously extruded slurry for a set distance to cure the slurry, and it is gradually cured layer by layer.

[0017] During the milling subtractive manufacturing process, the two-axis linkage mechanism drives the support member to move, and the printing platform moves in coordination under the drive of the lifting mechanism. The milling mechanism performs milling subtractive manufacturing on the cured part.

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

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

[0020] 1. In the composite manufacturing device of the present invention, the inner part of the discharge pipe is provided with a direct writing inner pipe, and the top end of the direct writing inner pipe is connected to the emission port of the direct 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, and the slurry is sent out from the direct writing discharge end of the lower discharge pipe. The high-energy light beam irradiates the center of the extruded slurry through the direct writing inner pipe. Through the light guiding property of the slurry (total internal reflection of the laser in the slurry), the internal irradiation curing of the slurry is completed along the slurry path. Compared with external irradiation curing, the curing effect is more uniform, and there is no planar anisotropy in the workpiece, improving the quality of the workpiece.

[0021] 2. The composite manufacturing device of the present invention is also provided with a milling mechanism, which organically combines the light-curing, direct writing, and milling technologies, gives full play to their respective advantages, and can efficiently construct complex internal structures, improving the precision, efficiency, and quality of part manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The schematic diagrams in the specification forming a part of the present invention are used to provide a further understanding 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 to the present invention.

[0023] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present invention;

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

[0025] Figure 3 is the structural schematic diagram of the light-curing assisted direct writing mechanism of Embodiment 1 of the present invention Figure 1 ;

[0026] Figure 4 is the schematic diagram of the light-curing assisted direct writing mechanism of Embodiment 1 of the present invention Figure 2 ;

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

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

[0029] Among them, 1. Frame body, 2. Support plate, 3. Processing mechanism, 4. Printing platform, 5. Material cylinder, 6. Discharge pipe, 7. Plunger head, 8. Feeding hose, 9. Rack, 10. Gear, 11. Guide wheel, 12. Rotating drive motor, 13. First one-way valve, 14. Fixed clamp, 15. Laser generator, 16. High-energy laser beam, 17. Direct writing inner tube, 18. Slurry, 19. Second one-way valve, 20. Shell, 21. Power mechanism, 22. Milling cutter, 23. Elevator motor, 24. Elevator lead screw, 25. Lifting plate, 26. Cleaning mechanism, 27. Dust suction mechanism. Detailed implementation mode

[0030] Embodiment 1

[0031] This embodiment provides a light-curing assisted direct writing and milling composite manufacturing device, as Figure 1 - Figure 2 shown, including a frame body 1. A two-axis linkage mechanism is provided at the top of the frame body 1. The two-axis linkage mechanism is a horizontal two-axis linkage mechanism. The horizontal two-axis linkage mechanism is connected to a support member and can drive the support member to move in two mutually perpendicular directions in the horizontal plane. In this embodiment, the support member adopts a support plate 2. A processing mechanism 3 is fixed on the support plate 2. The processing mechanism 3 includes a light-curing assisted direct writing mechanism and a milling mechanism. A light-curing assisted direct writing mechanism is installed on one side plate surface of the support plate 2, and a milling mechanism is fixed on the other side plate surface. The light-curing assisted direct writing mechanism is used for light-curing assisted direct writing additive manufacturing, and the milling mechanism is used for milling subtractive manufacturing. A printing platform 4 is provided below the support member. The printing platform 4 is connected to a lifting mechanism and can perform lifting movement under the drive of the lifting mechanism.

[0032] In this embodiment, the horizontal two-axis linkage mechanism can adopt the structure of the horizontal two-axis linkage mechanism of an existing 3D direct writing printing device, and the horizontal two-axis linkage mechanism is configured with monitoring components such as a displacement sensor and a proximity switch. 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 regulation. The printing platform is configured with a heating element and a temperature sensor, and the temperature of the printing platform can be regulated through the heating element and the temperature sensor.

[0034] The printing platform 4 provides support in many aspects during the printing process. Its stable characteristics lay a solid foundation for model printing, effectively preventing the model from shaking, shifting, and deforming, and ensuring that the model adheres firmly. Moreover, the printing platform can precisely control the temperature according to the characteristics of different direct writing materials, enhance the adhesion between the material and the platform, and reduce the warping and shrinkage of the model. In addition, the highly flat surface can ensure that the bottom of the model is flat and smooth, reducing the subsequent processing cost.

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

[0036] The horizontal two-axis linkage mechanism, the lifting mechanism, the heating element, etc. are all connected to the control system and can receive the instructions of the control system to work. The displacement sensor, the temperature sensor, and the 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 the feedback information from multiple sensors such as the displacement sensor, the temperature sensor, and the limit switch, and comprehensively regulates the working parameters of the light-guided light-curing assisted direct writing mechanism, the milling mechanism, and the printing platform based on this data. The control system accurately controls the movement trajectory of the light-curing assisted direct writing mechanism and the milling mechanism, the extrusion speed of the direct writing slurry, the path and depth of milling, and the temperature of the printing platform according to the preset printing model and the characteristic parameters of the direct writing slurry, etc., to ensure the high efficiency, stability, and high precision of the entire printing and milling process, and realize the light-curing assisted direct writing and milling additive and subtractive composite manufacturing.

[0038] The structures and working methods of the horizontal two-axis linkage mechanism, the lifting mechanism, and the printing platform can adopt existing technologies and will not be described in detail here.

[0039] As Figure 3 - Figure 4 shown, the light-curing assisted direct writing mechanism includes a material cylinder 5 fixed on the side surface of the support plate. The axis of the material cylinder 5 is vertically arranged. The top end of the material cylinder 5 is connected with an extrusion mechanism. The bottom end of the material cylinder 5 is connected with the feeding end of a discharge pipe 6, and the other end of the discharge pipe 6 serves as the direct writing discharge end.

[0040] The extrusion mechanism includes a plunger head 7 located inside the material cylinder 5. The plunger head 7 is slidably connected with the material cylinder 5 and can move along the axis 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 communicated with 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 filtering device and a material pump. The storage tank is used for storing a large amount of direct writing slurry, and a stirring device is arranged inside it. The stirring device can adopt existing equipment and will not be described in detail here. After the filtering device filters out impurities from the direct writing slurry in the storage tank, it flows into the material cylinder 5 through the feeding hose 8.

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

[0042] In this embodiment, the driving mechanism includes a rack 9. The rack 9 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 a gear 10. The other side of the rack 9 is a plane and slidably contacts the wheel surface of a 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 rotational driving member fixed to the support plate 2. The rotational driving member is used to drive the rotation of the gear.

[0044] In this embodiment, the rotational driving member adopts a rotational driving motor 12. The housing of the rotational driving motor 12 is fixed to the plate surface of the support plate 2 where the milling mechanism is installed. The output shaft of the rotational driving motor 12 is connected to the gear 10 and can drive the gear 10 to rotate.

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

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

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

[0048] The bottom end of the barrel 5 is connected to one end of a discharge pipe 6. The discharge pipe 6 is arranged at a set acute angle relative to the vertical direction. The bottom end of the discharge pipe 6 is arranged vertically as a direct writing discharge end.

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

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

[0051] The rotation drive motor 12 drives the gear 10 to rotate, and the rack 9 can drive the plunger head 7 to move in the barrel 5, so as to realize the extrusion of the slurry in the barrel 5 to the discharge pipe. Through the control of the rotation drive motor 12, gear 10 and rack 9, the extrusion amount during the direct writing of the slurry can be accurately controlled.

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

[0053] Further, the direct-writing inner pipe 17 and the discharge pipe 6 are located inside a housing 20, and the housing 20 is fixedly connected to the support plate 2.

[0054] As Figure 5 shown, the milling mechanism includes a milling spindle, the milling spindle is connected to a power mechanism 21, the power mechanism 21 can drive the milling spindle to rotate, and a milling cutter 22 is connected to the bottom end of the milling spindle. The power mechanism 21 can adopt 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, and the lead screw lifting mechanism can drive the power mechanism 21, the milling spindle and the milling cutter 22 to perform lifting movements.

[0055] The milling spindle drives the milling cutter to rotate at a high speed for milling operations to achieve the purpose of material removal.

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

[0057] On one side of the milling cutter 22, a cleaning mechanism 26 is provided, and on the other side, a dust suction mechanism 27 is provided. 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 through an air pipe. The dust suction mechanism 27 includes a dust suction hood fixed to the support plate 2. The dust suction hood is connected to a suction pump through a dust suction pipeline. The cleaning mechanism achieves the purpose of jet cleaning during material removal. The dust suction mechanism sucks the removed material during the jet cleaning of material removal, avoiding the influence of milling chips on subsequent direct writing additive manufacturing.

[0058] As Figure 6 shown, in the manufacturing device 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 guiding property of the slurry 18 (total internal reflection of the laser in the slurry), the slurry is irradiated and cured inside along the slurry path. Compared with external irradiation curing, the curing effect is more uniform, and the workpiece has no planar anisotropy, improving the quality of the workpiece. Moreover, the photo-curing, direct writing, and milling technologies are organically combined to give full play to their respective advantages, improving the precision, efficiency, and quality of part manufacturing.

[0059] Embodiment 2

[0060] This embodiment provides a working method of the photo-curing assisted direct writing and milling composite manufacturing device described in Embodiment 1, including alternately performing photo-curing direct writing additive manufacturing and milling subtractive manufacturing;

[0061] When performing photo-curing direct writing additive manufacturing, the two-axis linkage mechanism drives the support member to move, and the printing platform moves in coordination under the drive of the lifting mechanism. The material extrusion mechanism and the laser generator work. The material extrusion mechanism extrudes the slurry from the direct writing discharge end of the discharge pipe, and the laser emitted by the laser generator is guided by the continuously extruded slurry for a set distance to cure the slurry and gradually cure layer by layer;

[0062] Then, when performing milling subtractive manufacturing, the two-axis linkage mechanism drives the support member to move, and the printing platform moves in coordination under the drive of the lifting mechanism. The milling mechanism performs milling subtractive manufacturing on the cured part.

[0063] Alternately perform photo-curing direct writing additive manufacturing and milling subtractive manufacturing until the workpiece is processed.

[0064] Specifically:

[0065] Before processing, the operator imports the three-dimensional model data into the control system. The system analyzes the model and plans the processing paths and parameters of direct writing and milling.

[0066] During processing, the photo-curing direct writing mechanism extrudes the slurry at a stable flow rate, and the laser is guided by the continuously extruded slurry for a set distance to cure the slurry and gradually cure layer by layer.

[0067] After a part of the light-curing assisted direct writing is completed, the milling mechanism is started. The printing platform moves to the set position for milling.

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

[0069] The light-curing direct writing additive manufacturing and milling subtractive manufacturing are carried out alternately until the workpiece processing is completed.

[0070] In this embodiment, the temperature of the printing platform can be adjusted in the range of 15 - 85 °C. The printing speed is between 1 - 10 mm / s. The printing height (the distance between the linear discharging end and the printing platform or the substrate) is in the range of 0.1 - 5 mm, and the diameter of the discharging pipe is 0.05 mm or 0.1 mm or 0.15 mm. The laser wavelength of the laser beam emitted by the laser generator is 355 - 405 nm, and the power of the laser generator is 5 - 50 W. The light guiding accuracy can reach ±5 μm.

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

[0072] The positioning accuracy of the printing platform can reach ±10 μm, and the repeat positioning accuracy is ±5 μm. The maximum range of the processing size is length × width × height = 260 mm × 260 mm × 210 mm.

[0073] In a practical application of this embodiment, it is used for manufacturing automotive parts, and the manufacturing method includes the following steps:

[0074] Equipment assembly and debugging: Assemble strictly according to the equipment design drawings to ensure that each component is firmly installed and accurately connected. After assembly, conduct airtightness and flow tests on the direct writing system to ensure that no components are damaged. Debug the wavelength and power of the laser generator, calibrate the laser path to ensure that the light guiding accuracy meets the requirements. Select and install a suitable milling cutter, and at the same time conduct spindle speed tests on the milling processing system and positioning accuracy debugging of the milling workbench.

[0075] Material preparation: Select a direct writing slurry suitable for manufacturing automotive parts, pour the slurry into the storage tank, turn on the filtering device and stirring device to ensure that the material is uniform and free of impurities. At the same time, fill the entire feeding hose and extrusion device with the slurry

[0076] Processing operation: Import the 3D model of an automotive engine part into the control system. Set the laser wavelength to 365 nm, the power to 15 W, and the direct writing layer thickness to 0.1 mm. During the photocuring process, the system adjusts the direct writing path in real time according to the model. After 50% of the direct writing and curing is completed, the milling mechanism is started. Set the milling spindle speed to 5000 r / min and the positioning accuracy of the printing platform to ±10 μm, and perform milling on the part. During the processing, the control system adjusts each parameter in real time according to the sensor data.

[0077] Quality inspection: After processing, perform dimensional accuracy and surface quality inspection on the part. After inspection, the dimensional accuracy of the part reaches ±0.05 mm, and the surface roughness Ra is 0.8 μm, meeting the manufacturing standards of automotive engine parts.

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

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

[0080] Material selection and treatment: Select a direct writing paste for medical device manufacturing. Perform pretreatment according to the material instructions and adjust the material viscosity.

[0081] Processing process: Import the 3D model of a customized dental implant into the monitoring and control system. Set the laser wavelength to 385 nm, the power to 20 W, and the photocuring layer thickness to 0.08 mm. After photocuring is completed, the milling mechanism starts to work. Set the milling spindle speed to 8000 r / min and the positioning accuracy of the printing platform to ±10 μm, and perform milling on the implant. During the processing, optimize the processing parameters in real time according to the monitoring data.

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

[0083] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A light-curing assisted direct writing and milling composite manufacturing device, comprising a frame, a two-axis linkage mechanism is provided on the top of the frame, the two-axis linkage mechanism is connected to a support, and a printing platform connected to a lifting mechanism is provided below the support, characterized in that: A photocuring-assisted direct writing mechanism is provided on one side of the support, and a milling mechanism is provided on the other side. 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 a discharge tube. The other end of the discharge tube serves as a direct writing discharge end. A direct writing inner tube is coaxially arranged inside the direct writing discharge end of the discharge tube. The top end of the direct writing inner tube is connected to the emission port of a direct laser generator, and the laser generator is fixed on the support.

2. The light-curing assisted direct writing and milling composite manufacturing device according to claim 1, characterized in that: The extrusion mechanism includes a plunger head located in the barrel, the plunger head is slidably connected to the barrel, the plunger head is connected to a driving 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 connected to the space inside the barrel below the plunger head.

3. A light-curing assisted direct writing and milling composite manufacturing device as claimed in claim 2, characterized in that: The feeding hose is provided with a first one-way valve so that the slurry can only flow in the direction toward the inside of the barrel.

4. The light-curing assisted direct writing and milling composite manufacturing device according to claim 1, characterized in that: A second one-way valve is installed on the discharge pipe so that the slurry can only flow toward the direct writing discharge end.

5. The light-curing assisted direct writing and milling composite manufacturing device according to claim 1, characterized in that: The driving mechanism comprises a rack, the rack is slidably connected to the supporting member, the bottom end of the rack is connected to the plunger head, the rack is meshed with a gear, and the gear is connected to a rotating driving member fixed to the supporting member.

6. The light-curing assisted direct writing and milling composite manufacturing device as claimed in claim 5, characterized in that: One side of the rack is meshed with the gear, and the other side is provided with a guide wheel, the guide wheel is rotatably connected with the support member, and the guide wheel is slidably fitted with the rack.

7. The light-curing assisted direct writing and milling composite manufacturing device according to claim 1, characterized in that: The milling mechanism comprises a milling spindle, the milling spindle is connected to a power mechanism, the power mechanism is connected to a lead screw lifting mechanism installed on a support, and a milling cutter is connected to the bottom end of a milling head.

8. The light-curing assisted direct writing and milling composite manufacturing device as claimed in claim 7, characterized in that: A cleaning mechanism is provided on one side of the milling cutter, and a dust collecting mechanism is provided on the other side.

9. A working method of the light-curing assisted direct writing and milling composite manufacturing device according to any one of claims 1 to 8, characterized in that: Includes alternating light-curing direct writing additive processing and milling subtractive processing; When performing photocuring direct writing additive processing, the two-axis linkage mechanism drives the support to move, the printing platform moves in coordination with the lifting mechanism, the extrusion mechanism and the laser generator work, the extrusion mechanism extrude the slurry from the direct writing outlet end of the outlet pipe, and the laser emitted by the laser generator is guided by the continuously extruded slurry to cure the slurry at a set distance, and gradually cures layer by layer; When performing milling and cutting processing, the two-axis linkage mechanism drives the support to move, the printing platform moves in coordination with the lifting mechanism, and the milling mechanism performs milling and cutting processing on the solidified parts.

10. The working method of the light-curing assisted direct writing and milling composite manufacturing device according to claim 9, characterized in that: The power of the laser generator is 5-50W, and the wavelength of the emitted laser beam is 355-405nm.

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