An ultrasonic vibration and magnetic field assisted light solidification additive manufacturing equipment

Abstract

This invention relates to the field of 3D printing technology, and more specifically to an additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization. The equipment includes a resin tank containing a base resin with magnetic particles; an ultrasonic vibration module for distributing the magnetic particles evenly and densely in the vertical direction during continuous molding; and a magnetic field-assisted module for arbitrarily oriented magnetic particles in the base resin, thereby achieving uniform particle distribution and specific isotropic / anisotropic properties in the microstructure. This allows for the efficient and high-precision manufacture of micro-magnetic devices.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more specifically to an additive manufacturing equipment that combines ultrasonic vibration and magnetic field-assisted photopolymerization. Background Technology

[0002] Photopolymerization additive manufacturing (PIM) is an advanced manufacturing method that uses light as an energy source to selectively cure liquid photosensitive resin to build three-dimensional structures layer by layer. This technology offers significant advantages such as high manufacturing precision, fast molding speed, and strong support for structural complexity, making it particularly suitable for the rapid prototyping of microscale and complex structural components. Compared to traditional subtractive manufacturing processes, PIM technology enables efficient material utilization and more flexible structural design, supports highly free geometric shapes, and allows for rapid prototype iteration without complex molds, significantly shortening product development cycles. It is widely used in fields such as medical, electronics, microfluidics, biomimetic materials, and microdevices.

[0003] With the continuous development of China's manufacturing industry, higher requirements have been put forward for the performance of high-precision micro-magnetic devices. However, the single photopolymerization additive manufacturing technology is difficult to directionally arrange magnetic particles, and thus it is difficult to achieve isotropic or anisotropic N and N poles of micro-magnetic devices.

[0004] Chinese patent CN218985754U discloses an ultrasonic-assisted enhanced FDM 3D printing device, which places an ultrasonic vibration device at the bottom of the printing platform. This reduces internal thermal stress, improves interlayer bonding, and reduces surface roughness in parts printed by the FDM molding process, without negatively impacting printing efficiency. However, the FDM process itself is not suitable for printing high-precision micro-magnetic devices.

[0005] Therefore, there is a need for photopolymer additive manufacturing equipment that can efficiently and precisely manufacture micro-magnetic devices. Summary of the Invention

[0006] The purpose of this invention is to provide an additive manufacturing equipment that combines ultrasonic vibration and magnetic field-assisted photopolymerization, which can manufacture micro-magnetic devices with high efficiency and high precision.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] An additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization includes a resin tank containing a base resin with magnetic particles; an ultrasonic vibration module for distributing the magnetic particles evenly and finely in the vertical direction during continuous molding; and a magnetic field-assisted module for arbitrarily oriented magnetic particles in the base resin to achieve uniform particle distribution and specific isotropic / anisotropic properties in the microstructure.

[0009] The resin tank is installed on a vibration isolation platform, which is equipped with a light source module, a projection module, and a molding platform module. The light source module emits a UV light source, which is reflected into the resin tank through the projection module. The ultrasonic vibration module causes the settled magnetic particles to be evenly distributed in the vertical direction, and the magnetic field assist module causes the random particles to be oriented. Under the action of the UV light source, the base resin is continuously molded on the molding platform module. The molding position of the molding platform module is lifted upward at a uniform speed, and the printed part is continuously molded.

[0010] The ultrasonic vibration module includes an ultrasonic transducer set at the bottom of the resin tank. The ultrasonic transducer is externally connected to an industrial control computer-ultrasonic generator, which is mounted on a vibration isolation platform. The ultrasonic transducer generates a standing wave in the vertical direction to arrange the settled magnetic particles in a uniform and dense manner in the vertical direction.

[0011] The magnetic field-assisted module includes an upper electromagnetic coil and a lower electromagnetic coil installed on the upper and lower sides of the resin tank. The upper and lower electromagnetic coils are connected to each other through a ring electromagnetic coil support frame. The ring electromagnetic coil support frame is installed in the middle of the resin tank. A ring rack is rotatably connected to the ring electromagnetic coil support frame through a transmission bearing. A Heilbeck magnetic ring is installed in the groove of the ring rack. Multiple magnetic pole pieces are arranged on the Heilbeck magnetic ring according to a specific deflection method. A transmission gear is meshed and connected to the ring rack. The transmission gear is fixedly connected to the output shaft of the drive motor. The drive motor is fixedly connected to the motor support frame. The motor support frame is fixedly connected to the height-adjustable motor support frame. The height-adjustable motor support frame is installed on the vibration isolation platform.

[0012] The resin pool is a cylindrical hollow geometry;

[0013] The light source module includes a UV light source generator, a light source lens is installed on the emitting end of the UV light source generator, the UV light source generator is mounted on the light source bracket, the light source bracket is slidably connected to the slide rail, a manual adjustment screw is rotatably connected to the slide rail, the light source bracket is threadedly connected to the adjustment screw, and the slide rail is fixedly connected to the height-adjustable light source support frame.

[0014] The projection module includes a reflector, which is mounted on a horizontal connecting frame, and the horizontal connecting frame is mounted on a vertical height adjustment frame.

[0015] The molding platform module includes a printing platform located inside a resin tank. The printing platform is fixedly connected to a vertical displacement stage, which is slidably connected to a support frame of the molding platform module. A printing platform drive motor that drives the vertical displacement stage to move vertically is fixedly connected to the support frame of the molding platform module.

[0016] The beneficial effects of this invention are as follows:

[0017] This device addresses the shortcomings of traditional 3D printing equipment in printing high-precision micro- and nano-magnetic devices. It proposes a method combining ultrasonic vibration and a magnetic field. Ultrasonic vibration causes the magnetic particles settling in the resin bath to distribute more evenly and densely in the vertical direction, reducing internal voids and defects within the particles, resulting in stronger adhesion and higher precision between printed parts. The magnetic field allows the magnetic particles to be oriented in any direction, thus achieving isotropic or anisotropic N and S poles in the magnetic device. This device exhibits strong material adaptability, high application value, and meets the printing needs of high-end magnetic device products. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of the high-precision photopolymerization additive manufacturing equipment combining ultrasonic vibration and magnetic field assistance of the present invention.

[0020] Figure 2 This is a schematic diagram of the magnetic field auxiliary module, the sound field auxiliary module, and the resin pool structure of the present invention;

[0021] Figure 3 This is a planar schematic diagram of the synergistic modulation of micro / nano magnetic particles by magnetic field and acoustic field according to the present invention.

[0022] In the diagram: 1. UV light source generator; 2. Light source lens; 3. Light source bracket; 4. Slide rail; 5. Manual adjustment screw; 6. Height-adjustable light source support frame; 7. Reflector; 8. Horizontal connecting frame; 9. Vertical height adjustment frame; 10. Industrial computer-ultrasonic generator; 11. Ultrasonic transducer; 12. Upper electromagnetic coil; 13. Helbeck magnetic ring; 14. Ring rack; 15. Transmission gear; 16. Drive motor; 17. Motor support frame; 18. Height-adjustable motor support frame; 19. Printing platform; 20. Vertical displacement stage; 21. Printing platform drive motor; 22. Optical path; 23. Vibration isolation table; 24. Resin tank; 25. Transmission bearing; 26. Molding platform module support frame; 27. Base resin; 28. Magnetic particles; 29. ​​Lower electromagnetic coil; 30. Ring electromagnetic coil support frame; 31. Printed part. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figures 1 to 3 As shown, in order to achieve the technical effect of "manufacturing micro-magnetic devices with high efficiency and high precision", the structure and function of an equipment for photopolymerization additive manufacturing that combines ultrasonic vibration and magnetic field-assisted photopolymerization are described in detail below.

[0025] like Figure 1 As shown, an additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization includes a resin tank 24 containing a base resin 27 with magnetic particles 28; an ultrasonic vibration module for distributing the magnetic particles 28 evenly and densely in the vertical direction during continuous molding; and a magnetic field-assisted module for arranging the magnetic particles 28 in the base resin 27 in any direction to achieve uniform particle distribution and specific isotropic / anisotropic properties in the microstructure; thereby manufacturing high-precision micro-magnetic devices.

[0026] The resin tank 24 is installed on the vibration isolation table 23. The vibration isolation table 23 is equipped with a light source module, a projection module and a molding platform module. The light source module emits a UV light source, which is reflected into the resin tank 24 through the projection module. The ultrasonic vibration module generates ultrasonic vibration to make the settled magnetic particles 28 uniformly arranged in the vertical direction. The magnetic field auxiliary module makes the random magnetic particles 28 oriented. Under the action of the UV light source, the base resin 27 is continuously molded on the molding platform module. The molding position of the molding platform module is lifted upward at a uniform speed, and the printed part 31 is continuously molded.

[0027] The ultrasonic vibration module includes an ultrasonic transducer 11 disposed at the bottom of the resin tank 24. An industrial control computer-ultrasonic generator 10 is externally connected to the ultrasonic transducer 11. The industrial control computer-ultrasonic generator 10 is mounted on the vibration isolation table 23. The industrial control computer-ultrasonic generator 10 is used to control the ultrasonic transducer 11. The industrial control computer-ultrasonic generator 10 sends a specified signal, which is used to output electrical power, so that the ultrasonic transducer 11 converts the electrical power into mechanical power and generates vibration. The ultrasonic transducer 11 generates a standing wave in the vertical direction to arrange the settled magnetic particles 28 evenly and densely in the vertical direction, thereby ensuring the forming accuracy of the printed parts.

[0028] like Figure 3As shown, the magnetic field auxiliary module includes an upper electromagnetic coil 12 and a lower electromagnetic coil 29, which are interference-fitted and installed on the upper and lower sides of the resin tank 24. By controlling the magnitude and direction of the current flowing into the upper electromagnetic coil 12 and the lower electromagnetic coil 29, the upper electromagnetic coil 12 and the lower electromagnetic coil 29 generate a uniform magnetic field of variable magnitude in the vertical direction, which assists in the uniform and dense arrangement of magnetic particles 28 in the vertical direction. The upper electromagnetic coil 12 and the lower electromagnetic coil 29 are connected to each other by an annular electromagnetic coil support frame 30, which is installed in the middle of the resin tank 24. An annular rack 14 is rotatably connected to the annular electromagnetic coil support frame 30 through a transmission bearing 25. A Helbeck magnetic ring 13 is installed in the groove of the annular rack 14. The Helbeck magnetic ring 13 is provided with multiple magnetic pole pieces, which are arranged in a specific deflection pattern. The magnetic pole pieces generate a uniform magnetic field of variable magnitude in the horizontal direction through a specific arrangement and the circular motion of the annular rack 14, thereby enabling the magnetic particles 28 to move in the water. The magnetic particles 28 are arranged in a horizontal direction. By adjusting the magnitude and direction of the uniform magnetic field in the vertical and horizontal directions, a uniform magnetic field in any direction in space can be generated, thereby realizing the directional arrangement of the magnetic particles 28 in any direction in space. A transmission gear 15 is meshed and connected to the ring rack 14. The transmission gear 15 is fixedly connected to the output shaft of the drive motor 16. The drive motor 16 is fixedly connected to the motor support frame 17. The motor support frame 17 is fixedly connected to the height-adjustable motor support frame 18. The height-adjustable motor support frame 18 is mounted on the vibration isolation table 23 by screws. The height of the drive motor 16 can be adjusted by the height-adjustable motor support frame 18. When the output shaft of the drive motor 16 starts to rotate, the output shaft of the drive motor 16 drives the transmission gear 15 to rotate. The transmission gear 15 drives the ring rack 14 to rotate. The ring rack 14 drives the Heilbeck magnetic ring 13 to rotate, thereby adjusting the direction of the multiple magnetic pole pieces on the Heilbeck magnetic ring 13, and thus adjusting the direction of the horizontal magnetic field.

[0029] The resin pool 24 is a cylindrical cavity geometry; the resin pool 24 is connected and fixed to the vibration isolation table 23 by bolts; the resin pool 24, the annular rack 14 in the magnetic field auxiliary module, and the printing platform 19 in the forming platform module are concentrically geometrically related to facilitate the directional arrangement of magnetic particles 28 by the magnetic field and the continuous lifting and forming of the printed part 31 in the vertical direction.

[0030] The light source module includes a UV light source generator 1, a light source lens 2 is installed on the emitting end of the UV light source generator 1, the UV light source generator 1 is installed on the light source bracket 3, the light source bracket 3 is slidably connected to the slide rail 4, a manual adjustment screw 5 is rotatably connected to the slide rail 4, the light source bracket 3 is threadedly connected to the adjustment screw 5, and the slide rail 4 is fixedly connected to the height adjustable light source support frame 6.

[0031] Rotating the manual adjustment screw 5 allows the light source bracket 3 to move laterally via the thread, enabling the light source bracket 3 to adjust its position horizontally on the slide rail 4, thereby finding the appropriate position of the light source module in the vertical direction. The height-adjustable light source support frame 6 has a height adjustment function, used to find the appropriate position of the light source module in the vertical direction. The height-adjustable light source support frame 6 is connected to the vibration isolation table 23 by bolts.

[0032] The projection module includes a reflector 7, which is mounted on a horizontal connecting frame 8, and the horizontal connecting frame 8 is mounted on a vertical height adjustment frame 9.

[0033] The center of the reflector 7 is at the same height as the center of the UV light source generator 1. It is used to reflect horizontal light to illuminate the center of the resin tank 24, so as to ensure that the printed parts receive the UV light source evenly, thereby ensuring high-precision molding. The reflector 7 is fixedly connected to the horizontal connecting frame 8 by bolts. The horizontal connecting frame 8 is welded to the vertical height adjustment frame 9. The vertical height adjustment frame 9 can be adjusted vertically to find the appropriate position of the reflector 7 in the vertical direction. The vertical height adjustment frame 9 is installed on the vibration isolation table 23 by screws. The vibration isolation table 23 has multiple mounting holes, thereby adjusting the installation position of the vertical height adjustment frame 9. The projection module can be moved horizontally to find the appropriate horizontal position of the reflector 7, so as to ensure that the printed parts receive the UV light source evenly, thereby ensuring high-precision molding.

[0034] The molding platform module includes a printing platform 19, which is located in the resin tank 24. The printing platform 19 is fixedly connected to the vertical displacement stage 20, which is slidably connected to the molding platform module support frame 26. A printing platform drive motor 21 for driving the vertical displacement stage 20 to move vertically is fixedly connected to the molding platform module support frame 26.

[0035] The printing platform 19 is a plastic forming material with a certain support capacity. It is placed in the resin tank 24 and is coaxial with the resin tank 24. During the continuous molding process, the printing platform drive motor 21 can drive the vertical displacement stage 20 to slide vertically on the molding platform module support frame 26, thereby adjusting the height of the printing platform 19 and lifting the printing platform 19 to complete the continuous molding of the printed part 31.

[0036] In use, the UV light source generator 1 emits UV light, and the reflector 7 directs the light path 22 into the resin tank 24. The resin tank 24 is used to hold the pre-prepared base resin 27 containing magnetic particles 28. The ultrasonic transducer 11 is placed in the resin tank 24, and the two are concentrically positioned. The ultrasonic transducer 11 generates a vertical standing wave, causing the settled magnetic particles to be uniformly distributed in the vertical direction. The upper electromagnetic coil 12, the lower electromagnetic coil 29, and the annular electromagnetic coil support frame 30 are also concentrically geometrically positioned with the resin tank 24. The magnetic coils 29 work together to generate a variable uniform magnetic field in the vertical direction, which in turn causes the magnetic particles 28 to be oriented vertically. The Heilbeck magnetic ring 13 and the resin pool 24 maintain a concentric geometric relationship and rotate under the drive of the transmission gear 15 to generate a variable uniform magnetic field in the horizontal direction. Under the combined action of the light source module, the ultrasonic vibration module and the magnetic field auxiliary module, the printed part 31 begins to form on the surface of the printing platform 19. The printing platform 19 is lifted vertically at a suitable speed under the action of the vertical displacement stage 20, so that the printed part 31 is continuously formed.

[0037] like Figure 2 As shown, the magnetic pole pieces (N, S) in the Helbeck magnetic ring 13 are nested in the inner groove of the annular rack 14 according to a specific arrangement. The annular rack 14 meshes with the drive gear 15. Under the action of the drive motor 16, the Helbeck magnetic ring 13 rotates at a constant speed, thereby forming a variable uniform magnetic field in the horizontal direction. The magnetic particles 28 in the resin pool 24 will be oriented under the combined action of the magnetic field generated by the Helbeck magnetic ring 13, the upper electromagnetic coil 12, and the lower electromagnetic coil 29, so that the printed parts can obtain isotropic or anisotropic properties.

[0038] like Figure 3 As shown, Figure 3 In the left image, when the magnetic field-assisted module and the ultrasonic vibration-assisted module are not activated, the magnetic particles 28 are deposited at the bottom of the resin pool 24 and arranged randomly, resulting in the magnetic particles 28 in the printed part 31 being randomly arranged without specific isotropy / anisotropy. Figure 3 In the right figure, the magnetic field auxiliary module and the ultrasonic vibration auxiliary module are activated. Under the action of the ultrasonic transducer 11, the magnetic particles 28 that have settled in the resin pool 24 will float up again and be uniformly arranged in the vertical direction of the base resin 27. Under the combined action of the Heilbeck magnetic ring 13, the upper electromagnetic coil 12 and the lower electromagnetic coil 29, the magnetic particles 28 can achieve directional arrangement in any direction in space to obtain isotropic / anisotropic properties. It can be seen that the first layer of magnetic particles 28 of the printed part 31 has obtained a horizontal rightward directional arrangement, the second layer of magnetic particles 28 has obtained a vertical downward directional arrangement, and the third layer of magnetic particles 28 has obtained a leftward directional arrangement with an angle of 45° with the vertical direction.

[0039] Under the action of the magnetic field auxiliary module, a variable uniform magnetic field in the vertical direction is generated by the upper electromagnetic coil 12 and the lower electromagnetic coil 29, and a variable uniform magnetic field in the horizontal direction is generated by the rotation of the Heilbeck magnetic ring 13. The magnetic fields can be superimposed in any plane in space, thereby realizing a uniform magnetic field in any direction in space, guiding the magnetic particles 28 to be oriented in any direction in space, thereby realizing the high-efficiency and high-precision manufacturing of isotropic / anisotropic micro magnetic devices.

Claims

1. An additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization, comprising a resin tank (24), characterized in that: The resin pool (24) is provided with a base resin (27) containing magnetic particles (28); it also includes an ultrasonic vibration module for distributing the magnetic particles (28) evenly and finely in the vertical direction by using ultrasonic vibration during continuous molding; it also includes a magnetic field auxiliary module for arranging the magnetic particles (28) in the base resin (27) in any direction, thereby achieving uniform particle distribution and specific isotropic / anisotropic properties in the microstructure. The resin tank (24) is installed on the vibration isolation table (23). The vibration isolation table (23) is equipped with a light source module, a projection module and a molding platform module. The light source module emits a UV light source, which is reflected into the resin tank (24) through the projection module. The ultrasonic vibration module causes the settled magnetic particles (28) to be evenly arranged in the vertical direction. The magnetic field auxiliary module causes the random magnetic particles (28) to be oriented. Under the action of the UV light source, the base resin (27) is continuously molded on the molding platform module. The molding position of the molding platform module is lifted upward at a uniform speed, and the printed part (31) is continuously molded. The ultrasonic vibration module includes an ultrasonic transducer (11) set at the bottom of the resin tank (24). The ultrasonic transducer (11) is connected to an industrial computer-ultrasonic generator (10). The industrial computer-ultrasonic generator (10) is installed on the vibration isolation table (23). The ultrasonic transducer (11) generates a standing wave in the vertical direction to arrange the settled magnetic particles (28) evenly and densely in the vertical direction. The magnetic field-assisted module includes an upper electromagnetic coil (12) and a lower electromagnetic coil (29) installed on the upper and lower sides of the resin tank (24). The upper electromagnetic coil (12) and the lower electromagnetic coil (29) are connected to each other by an annular electromagnetic coil support frame (30). The annular electromagnetic coil support frame (30) is installed in the middle of the resin tank (24). An annular rack (14) is rotatably connected to the annular electromagnetic coil support frame (30) through a transmission bearing (25). A Heilbeck magnetic ring is installed in the groove of the annular rack (14). (13) Multiple magnetic pole pieces are provided on the Heilbeck magnetic ring (13). The magnetic pole pieces are arranged in a specific deflection manner. A transmission gear (15) is meshed and connected on the ring rack (14). The transmission gear (15) is fixedly connected to the output shaft of the drive motor (16). The drive motor (16) is fixedly connected to the motor support frame (17). The motor support frame (17) is fixedly connected to the height-adjustable motor support frame (18). The height-adjustable motor support frame (18) is installed on the vibration isolation table (23).

2. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 1, characterized in that: The resin pool (24) is a cylindrical cavity geometry.

3. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 1, characterized in that: The light source module includes a UV light source generator (1), a light source lens (2) is installed on the emitting end of the UV light source generator (1), the UV light source generator (1) is installed on the light source bracket (3), the light source bracket (3) is slidably connected to the slide rail (4), a manual adjustment screw (5) is rotatably connected to the slide rail (4), and the light source bracket (3) is threadedly connected to the adjustment screw (5).

4. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 3, characterized in that: The slide rail (4) is fixedly connected to the height-adjustable light source support frame (6).

5. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 4, characterized in that: The projection module includes a reflector (7), which is mounted on a horizontal connecting frame (8), and the horizontal connecting frame (8) is mounted on a vertical height adjustment frame (9).

6. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 1, characterized in that: The molding platform module includes a printing platform (19), which is located in the resin tank (24). The printing platform (19) is fixedly connected to the vertical displacement stage (20), which is slidably connected to the molding platform module support frame (26).

7. The additive manufacturing equipment combining ultrasonic vibration and magnetic field-assisted photopolymerization according to claim 6, characterized in that: The molding platform module support frame (26) is fixedly connected to a printing platform drive motor (21) that drives the vertical displacement stage (20) to move vertically.

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