CN107993830B - Device and method for 3D printing of magnetic material - Google Patents
Device and method for 3D printing of magnetic material Download PDFInfo
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- CN107993830B CN107993830B CN201711217745.3A CN201711217745A CN107993830B CN 107993830 B CN107993830 B CN 107993830B CN 201711217745 A CN201711217745 A CN 201711217745A CN 107993830 B CN107993830 B CN 107993830B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
Abstract
The invention provides a device and a method for 3D printing of a magnetic material, belonging to the technical field of novel rapid forming. The powder feeding system transmits the mixed magnetic powder through compressed air, the magnetizing system is installed by overlapping circular units and is connected with electrodes to form a loop, wherein current flows spirally in the overlapped circular units to generate a magnetic field, and printed parts are magnetized point by point.
Description
Technical Field
The invention discloses a device and a method for 3D printing of a magnetic material, and belongs to the technical field of novel rapid forming.
Background
The magnetic material is closely related to aspects of informatization, automation, electromechanical integration, national defense and national economy and also closely related to our life, and a magnet rod, a circular magnet and various magnets can be seen everywhere. Now, the personalized demand of people has become very urgent, the 3D printing technology featuring digitization, networking, personalization, customization has released the design of the traditional process, the manufacturing pain, and the magnet manufacturers are beginning to develop towards the personalized direction.
3D printing is a technique for building objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files. Current 3D printing technologies mainly include Fused Deposition Modeling (FDM), Laser Additive Manufacturing (LAM), electron beam fused modeling (EBM), binder jet modeling (3 DP), and the like. The fused deposition modeling principle of FDM is as follows: the heating nozzle does X-Y plane movement under the control of a computer according to the section profile information of a product part, the filamentous material is sent to the hot melting nozzle by the filament supply mechanism, heated and melted into semi-liquid state in the nozzle, then extruded out, selectively coated on a workbench, and rapidly cooled to form a thin sheet profile with a fixed layer thickness. And after the section of one layer is formed, the workbench descends to a certain height, then the cladding of the next layer is carried out, and the process is circulated, so that the three-dimensional product part is finally formed. FDM has simple technical principle and lower cost, and is mostly used for the printing of thermoplastic high molecular polymers and mainly applied to the fields of education, art and the like.
The traditional process for manufacturing the magnetic material comprises injection molding, sintering and bonding, and not only has complex process, high cost and poor mechanical property of a finished piece, but also has simple shape of the manufactured magnet and simple distribution of magnetic induction lines. Greatly limiting the wider application of magnetic materials. Any complex shaped magnetic part can be printed using 3D printing. In the printing process, synchronous magnetization is carried out, the distribution of magnetic induction lines and the strength of a magnetic field are changed, and the magnetic material with special magnetic induction line distribution can be obtained.
At present, the 3D printing technology is utilized to produce magnetic parts with complex structures and special magnetic induction line distribution, reports are few, and the technology can certainly promote the rapid development of the magnetic material industry.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the device and the method for 3D printing of the magnetic material, can 3D print magnets in any shapes, can obtain magnetic parts with complex structures and special arrangement of magnetic induction lines by personalized magnetization in the printing process, and adopts powder materials as raw materials to manufacture the magnetic parts.
In order to solve the technical problems, the invention adopts the technical scheme that: a device for 3D printing of magnetic materials comprises a computer control center, a mechanical movement system, a powder feeding system and a magnetizing system, wherein the computer control center is electrically connected with the mechanical movement system, the powder feeding system and the magnetizing system;
the mechanical motion system is structurally characterized in that: the device comprises a stepping motor, a gear, a rack, a roller lead screw, a slide block, a crawler mechanism, a linear guide rail, a rack and a base plate; the upper side surface of the rack bottom plate is provided with a linear guide rail along the Y-axis direction, namely the front-back direction, the crawler mechanisms are arranged on the linear guide rail in a matching manner, the base plate is arranged on the crawler mechanisms and can reciprocate along the Y-axis direction along with the crawler mechanisms, the two roller screws are symmetrically arranged at two ends of the rack bottom plate and are arranged along the Z-axis direction, namely the vertical direction, the lower end of each roller screw is provided with a stepping motor, the upper end of each roller screw is movably arranged on the rack, a rack is arranged between the two roller screws, two ends of the rack are arranged on the roller screws in a matching manner through sliders, the rack is arranged along the X-axis direction, namely the left-right direction, and the gears are arranged on the rack in;
the powder feeding system has the structure that: the printer head is arranged on a gear and can reciprocate along the direction of an X axis along with the gear, the mixed magnetic powder driver and the curing agent driver are arranged in a split manner with the rack, and the mixed magnetic powder driver and the curing agent driver are communicated with the printer head through the powder transmission channel; the printer head comprises a nozzle, a spraying net and a pressure sensor, wherein the spraying net is arranged in the nozzle, and the pressure sensor is arranged on the side wall of the nozzle;
the structure of the magnetizing system is as follows: including pulse voltage generating device and the aircraft nose that magnetizes, the aircraft nose that magnetizes also sets up on the rack through the gear, is located the frame outside be connected between pulse voltage generating device and the aircraft nose that magnetizes, the aircraft nose that magnetizes includes circular unit and electrode, and a plurality of electrodes transversely set up on the lateral wall of circular unit, circular unit comprises 3/4 circular silicon steel sheet, 1/4 circle insulating material and contact piece, just the contact piece is located between 3/4 circular silicon steel sheet and the 1/4 circle insulating material.
The printer head, the magnetizing head and the crawler mechanism are all driven by respective stepping motors.
The stepping motor is a hybrid stepping motor, a fan is arranged in the stepping motor, the stepping angle is 1.8 degrees, and the microstep is 1/16 degrees.
The mixed magnetic powder in the mixed magnetic powder driver is formed by mixing any one of high molecular polymer, ferrite powder, neodymium iron boron powder, aluminum nickel cobalt powder, samarium cobalt powder and plastic magnetic powder, the weight of the high molecular polymer accounts for 0-40%, and the granularity of the mixed magnetic powder is 20-60 mu m.
The powder feeding system adopts pneumatic powder feeding, and the auxiliary gas is compressed air.
The opening diameters of the nozzle are 0.5-1 mm and 0.1-1.2 mm respectively, and the spray net is arranged in the opening of the curing agent nozzle, and the mesh number is 500-800 #.
The pulse voltage generating device is composed of electric components including a direct current power supply, a direct current transformer, a capacitor and a contactor.
A plurality of circular unit superposes in proper order, and adjacent circular unit misplaces 90 and the dislocation direction of rotation is unanimous each other to be located and be provided with the electrode on the circular unit of top and least significant end.
Scribble insulating material between the upper and lower contact surface of circular unit, the contact piece is used for connecting upper and lower 3/4 circular silicon steel sheet, the center of circular unit is provided with the through-hole that the aperture is 1mm, electricity is connected between electrode and the pulse voltage generating device.
The invention discloses a method for 3D printing of a magnetic material, which is implemented according to the following steps:
the first step is as follows: designing a three-dimensional model of the part by using three-dimensional software including Pro/E;
the second step is that: slicing processing and magnetic field arrangement are carried out by using slicing software, and files are stored;
the third step: importing the file into a computer control center, and controlling a printer head to start printing;
the fourth step: when n layers are printed, wherein n is more than 1, starting a magnetizing system, and starting point-by-point magnetizing of a magnetizing head;
the fifth step: after the magnetization is finished, the magnetizing machine head returns to the position with X =0, and the printing machine head starts to continue printing;
and a sixth step: repeating the fourth step and the fifth step until all printing and magnetizing processes are finished;
the seventh step: and finishing printing after final treatment.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure principle, low cost, digital production process and short production period of products, can carry out industrial production without large working site, and can produce various magnetic parts with complex structures and complex magnetic induction line distribution, including parts such as Halbach Array and the like.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the mechanical motion system of the present invention.
Fig. 3 is a schematic view of the structure of the printer head of the present invention.
Fig. 4 is a schematic structural view of the magnetizing head of the present invention.
Fig. 5 is a schematic structural view of a circular unit according to the present invention.
Fig. 6 is a schematic view of the finished parts of the embodiment.
In the figure: the device comprises a computer control center 1, a mechanical motion system 2, a stepping motor 21, a gear 22, a rack 23, a roller screw 24, a slider 25, a crawler mechanism 26, a linear guide rail 27, a rack 28, a base plate 29, a powder feeding system 3, a mixed magnetic powder driver 31, a curing agent driver 32, a powder transmission channel 33, a printer head 34, a nozzle 341, a spray net 342, a pressure sensor 343, a magnetizing system 4, a pulse voltage generator 41, a magnetizing head 42, a circular unit 421, a circular silicon steel sheet 3/4 for 4211, a circular insulating material 1/4 for 4212, a contact sheet 4213 and an electrode 422.
Detailed Description
As shown in fig. 1 to 5, the apparatus for 3D printing of a magnetic material of the present invention includes a computer control center 1, a mechanical motion system 2, a powder feeding system 3, and a magnetizing system 4, wherein the computer control center 1 is electrically connected to the mechanical motion system 2, the powder feeding system 3, and the magnetizing system 4;
the mechanical motion system 2 has the following structure: comprises a stepping motor 21, a gear 22, a rack 23, a roller screw 24, a slide block 25, a crawler 26, a linear guide rail 27, a frame 28 and a base plate 29; a linear guide rail 27 is arranged on the upper side surface of the bottom plate of the rack 28 along the Y-axis direction, namely the front-back direction, the crawler 26 is arranged on the linear guide rail 27 in a matching manner, the substrate 29 is arranged on the crawler 26 and can reciprocate along the Y-axis direction along with the crawler 26, the two roller screws 24 are symmetrically arranged at two ends of the bottom plate of the rack 28 and are arranged along the Z-axis direction, namely the vertical direction, the lower end of each roller screw 24 is provided with a stepping motor 21, the upper end of each roller screw 24 is movably arranged on the rack 28, a rack 23 is arranged between the two roller screws 24, two ends of the rack 23 are arranged on the roller screws 24 in a matching manner through a slider 25, the rack 23 is arranged along the X-axis direction, namely the left-right direction, and the gear 22 is arranged on the rack;
the powder feeding system 3 has the structure that: the printer head 34 is arranged on the gear 22 and can reciprocate along the X-axis direction along with the gear 22, the mixed magnetic powder driver 31 and the curing agent driver 32 are arranged separately from the rack 28, and the mixed magnetic powder driver 31 and the curing agent driver 32 are communicated with the printer head 34 through the powder transmission channel 33; the printer head 34 includes a nozzle 341, a nozzle net 342, and a pressure sensor 343, the nozzle net 342 is disposed inside the nozzle 341, and the pressure sensor 343 is disposed on a side wall of the nozzle 341;
the structure of the magnetizing system 4 is as follows: the magnetizing head 42 is also arranged on the rack 23 through the gear 22, the pulse voltage generating device 41 and the magnetizing head 42 which are positioned on the outer side of the rack 28 are electrically connected, the magnetizing head 42 comprises a circular unit 421 and electrodes 422, the electrodes 422 are transversely arranged on the outer side wall of the circular unit 421, the circular unit 421 consists of 3/4 circular silicon steel sheets 4211, 1/4 circular insulating materials 4212 and a contact piece 4213, and the contact piece 4213 is positioned between 3/4 circular silicon steel sheets 4211 and 1/4 circular insulating materials 4212.
The printer head 34, the magnetizing head 42 and the crawler 26 are all driven by respective stepping motors 21.
The stepping motor 21 is a hybrid stepping motor, a fan is arranged in the hybrid stepping motor, the stepping angle is 1.8 degrees, and the microstep is 1/16 degrees.
The mixed magnetic powder in the mixed magnetic powder driver 31 is formed by mixing any one of high molecular polymer, ferrite powder, neodymium iron boron powder, aluminum nickel cobalt powder, samarium cobalt powder and plastic magnetic powder, wherein the weight of the high molecular polymer accounts for 0-40%, and the granularity of the mixed magnetic powder is 20-60 mu m.
The powder feeding system 3 adopts pneumatic powder feeding, and the auxiliary gas is compressed air.
The opening diameters of the nozzle 341 are 0.5 mm-1 mm and 0.1-1.2 mm respectively, and the spray net 342 is arranged inside the opening of the curing agent nozzle, and the mesh number is 500-800 #.
The pulse voltage generator 41 is composed of electrical components including a dc power supply, a dc transformer, a capacitor, and a contactor, and is used to adjust the magnitude and direction of the magnetizing voltage.
The circular units 421 are sequentially overlapped, adjacent circular units 421 are staggered by 90 degrees and have the same staggered rotation direction, and electrodes 422 are arranged on the circular units 421 at the topmost end and the bottommost end.
The upper and lower contact surfaces of the circular unit 421 are coated with insulating materials, the contact sheet 4213 is used for connecting the upper and lower 3/4 circular silicon steel sheets 4211, the center of the circular unit 421 is provided with a through hole with an aperture of 1mm, and the electrode 422 and the pulse voltage generating device 41 are electrically connected.
The invention discloses a method for 3D printing of a magnetic material, which is implemented according to the following steps:
the first step is as follows: designing a three-dimensional model of the part by using three-dimensional software including Pro/E;
the second step is that: slicing processing and magnetic field arrangement are carried out by using slicing software, and files are stored;
the third step: importing the file into the computer control center 1, and controlling the printer head 34 to start printing;
the fourth step: when printing n layers, wherein n is more than 1, starting the magnetizing system 4, and starting point-by-point magnetizing by the magnetizing head 42;
the fifth step: after the magnetization is completed, the magnetizing head 42 returns to the position of X =0, and the printer head 34 starts to continue printing;
and a sixth step: repeating the fourth step and the fifth step until all printing and magnetizing processes are finished;
the seventh step: and finishing printing after final treatment.
The present invention will be described in detail with reference to specific examples.
Wherein, mechanical motion system includes: the device comprises a stepping motor, a gear, a rack, a roller lead screw, a transverse moving beam, a longitudinal moving beam, a crawler, a linear guide rail and a sliding block. The transverse moving beam and the longitudinal moving beam are respectively used as a protective rack and a roller screw, 5 stepping motors are arranged in total, the two stepping motors are arranged on two sides of the 3D printer and are respectively connected with the two roller screws, so that the up-and-down motion of a slide block on the axial moving beam in a Z axis is realized, and the transverse moving beam is arranged on the slide block on the axial moving beam, so that the up-and-down motion of a printer head, a magnetizing head and the like on the transverse moving beam is realized; the rotors of the two stepping motors are provided with gears which are respectively matched with the racks to realize the left and right movement of the printer head and the magnetic charging head on the transverse moving beam on the X axis; the other platform is arranged at the lower part of the 3D printer, and the front and back movement of the platform on the Y axis is realized through the crawler and the linear guide rail. The powder feeding system comprises: mixed magnetic driver, curing agent driver, powder transmission channel and printer head. Printer head and the aircraft nose that magnetizes link to each other with a motor respectively, install on horizontal fortune merit roof beam through the slider, the printer head is by the nozzle, spout the net, pressure sensor constitutes, the nozzle is hollow bilayer structure, the auxiliary gas of certain pressure and flow blows in nozzle inlayer passageway with mixed magnetic through powder transmission path for print, the curing agent driver will spray on mixed magnetic, accomplish the solidification, thereby accomplish magnetic material's 3D and print the action. The magnetizing system comprises: the pulse voltage generating device and the magnetizing head. The magnetizing head consists of circular units and electrodes, wherein the circular units consist of 3/4 circular silicon steel sheets, 1/4 circular insulating materials and contact pieces, the circular units are installed in an overlapping mode, the circular units at two ends are provided with the electrodes and connected with the electrodes to form a loop, the upper contact surface and the lower contact surface of the circular units are coated with the insulating materials and are not conductive, the circular sheets are conductive through the contact pieces, and current flows in the overlapped circular units in a spiral mode. The current is led into the silicon steel sheet through one end electrode, then enters the next silicon steel sheet through the contact sheet, and finally is led out through the other end electrode to form a loop, a magnetic field is generated, and the magnetic field penetrates out of the central hole of the circular unit.
After printing of a certain number of layers is finished, under the control of a computer, the pulse voltage generating device generates a certain magnetizing voltage, the magnetizing head selectively magnetizes the printed layers point by point, and the strength and direction of magnetism and the direction of a magnetic field are determined by the magnitude and direction of the magnetizing voltage.
The magnetizing head consists of a circular unit and electrodes, wherein the circular unit consists of 3/4 circular silicon steel sheets and 1/4 circular insulating materials, the upper contact surface and the lower contact surface of the circular unit are coated with the insulating materials and are not conductive, a through hole with the aperture of 1mm is formed in the center of the circular unit, and the intensity and the direction of a magnetizing magnetic field are determined by the size and the direction of a magnetizing voltage.
And after the magnetizing head is magnetized, the magnetizing voltage is 0, and the magnetic field does not exist in the magnetizing head any more.
The post-treatment process comprises the processes of support removal, hot pressing and the like.
The upper and lower circular units are sequentially installed by rotating in the same direction by 90, the upper and lower contact surfaces of the circular units are coated with insulating materials and are not conductive, the circular sheets are conductive through the contact pieces, the circular units at two ends are provided with electrodes, current is led into the silicon steel sheet through the electrode at one end, then enters the next silicon steel sheet through the contact pieces, and finally is led out through the electrode at the other end to form a loop.
The stepping motors are provided with 5 stepping motors, and the two stepping motors are respectively connected with the two roller screws to realize the up-and-down motion of the roller screws and the slide blocks on the longitudinal moving beam on the Z axis. The two machines are respectively assembled into a whole at the printer head and the magnetizing head and are arranged on a sliding block on the transverse moving beam, and in addition, a motor stepping motor rotor is provided with a gear which is meshed with a rack, so that the movement of the sliding block, the printer head and the magnetizing head on the sliding block can be respectively realized at an X axis. And the other stepping motor realizes the movement of the substrate along the Y axis on the linear guide rail through a crawler.
The following further describes the printing of a Halbach Array (Halbach Array) as an example:
a mixed magnetic powder for forming Halbach array structure comprises 80% of isotropic NdFeB powder and 20% of nylon powder, and a curing agent is an epoxy resin adhesive, and the thickness of a part is 10 mm.
The first step is as follows: using three-dimensional software such as Pro/E and the like to design a three-dimensional model of a Halbach array structure;
the second step is that: slicing treatment and magnetic field arrangement are carried out by using slicing software, the thickness of a slicing layer is 1mm, and a file is stored;
the third step: importing a file into the computer 1, starting printing by the printer head 9 under the control of the computer control system 1, and keeping the magnetizing head 10 from moving at the position of X = 0;
the fourth step: after the printer prints 5 layers, the magnetizing system 4 is started, the magnetizing head 10 generates a certain magnetic field, and the magnetizing head 10 starts to magnetize point by point;
the fifth step: after the magnetization is finished, the magnetizing head 10 returns to the position where X =0, and the printing head starts to continue printing;
and a sixth step: when the printer prints 10 layers, the magnetizing head 10 continues to magnetize point by point;
the seventh step: and (4) finishing printing, performing post-processing: further curing was carried out by sintering at 210 ℃ for 30 minutes. The final part is shown in figure 6.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. The device for 3D printing of the magnetic material is characterized by comprising a computer control center (1), a mechanical movement system (2), a powder feeding system (3) and a magnetizing system (4), wherein the computer control center (1) is electrically connected with the mechanical movement system (2), the powder feeding system (3) and the magnetizing system (4);
the mechanical motion system (2) is structurally characterized in that: the device comprises a stepping motor (21), a gear (22), a rack (23), a roller screw (24), a slider (25), a crawler mechanism (26), a linear guide rail (27), a rack (28) and a base plate (29); a linear guide rail (27) is arranged on the upper side surface of the bottom plate of the frame (28) along the Y-axis direction, namely the front-back direction, the crawler mechanism (26) is arranged on the linear guide rail (27) in a matching way, the base plate (29) is arranged on the crawler mechanism (26), and can reciprocate along the Y-axis direction along with the crawler mechanism (26), the two roller screw rods (24) are symmetrically arranged at the two ends of the bottom plate of the frame (28) and along the Z-axis direction, namely, the device is arranged in the vertical direction, the lower end of each roller screw (24) is provided with a stepping motor (21), the upper end is movably arranged on a frame (28), a rack (23) is arranged between the two roller screws (24), two ends of the rack (23) are arranged on the roller screw (24) in a matching way through a sliding block (25), the rack (23) is arranged along the X-axis direction, namely, the gear (22) is arranged on the rack (23) in a matching way in the left-right direction;
the powder feeding system (3) has the structure that: the printing machine comprises a mixed magnetic powder driver (31), a curing agent driver (32), a powder transmission channel (33) and a printing machine head (34), wherein the printing machine head (34) is arranged on a gear (22) and can reciprocate along the X-axis direction along with the gear (22), the mixed magnetic powder driver (31) and the curing agent driver (32) are arranged in a split manner with a rack (28), and the mixed magnetic powder driver (31) and the curing agent driver (32) are communicated with the printing machine head (34) through the powder transmission channel (33); the printer head (34) comprises a nozzle (341), a spray net (342) and a pressure sensor (343), wherein the spray net (342) is arranged inside the nozzle (341), and the pressure sensor (343) is arranged on the side wall of the nozzle (341);
the structure of the magnetizing system (4) is as follows: the magnetizing device comprises a pulse voltage generating device (41) and a magnetizing head (42), wherein the magnetizing head (42) is also arranged on a rack (23) through a gear (22), the pulse voltage generating device (41) positioned on the outer side of a rack (28) is electrically connected with the magnetizing head (42), the magnetizing head (42) comprises a circular unit (421) and electrodes (422), the electrodes (422) are transversely arranged on the outer side wall of the circular unit (421), the circular unit (421) consists of 3/4 circular silicon steel sheets (4211), 1/4 circular insulating materials (4212) and contact sheets (4213), and the contact sheets (4213) are positioned between 3/4 circular silicon steel sheets (4211) and 1/4 circular insulating materials (4212); the round silicon steel sheets (4211) are electrically conducted through the contact sheets (4213);
the printer head (34), the magnetizing head (42) and the crawler mechanism (26) are driven by respective stepping motors (21);
the circular units (421) are sequentially overlapped, adjacent circular units (421) are staggered by 90 degrees and have the same staggered rotation direction, and electrodes (422) are arranged on the circular units (421) at the topmost end and the bottommost end.
2. The apparatus for 3D printing of magnetic material according to claim 1, wherein the stepper motor (21) is a hybrid stepper motor with a built-in fan, with a step angle of 1.8 ° and microsteps of 1/16.
3. The 3D printing device for the magnetic material according to claim 1, wherein the mixed magnetic powder in the mixed magnetic powder driver (31) is formed by mixing any one of high polymer and ferrite powder, neodymium iron boron powder, aluminum nickel cobalt powder, samarium cobalt powder and plastic magnetic powder, the weight of the high polymer accounts for 0-40%, and the particle size of the mixed magnetic powder is 20-60 μm.
4. The apparatus for 3D printing of magnetic material according to claim 1, wherein the powder feeding system (3) employs pneumatic powder feeding and the auxiliary gas is compressed air.
5. The apparatus for 3D printing of magnetic material according to claim 1, characterized in that the pulse voltage generating means (41) consists of electrical components including a dc power supply, a dc transformer, a capacitor and a contactor.
6. The 3D printing device for the magnetic materials as claimed in claim 5, wherein the circular unit (421) is coated with an insulating material between the upper and lower contact surfaces, the contact sheet (4213) is used for connecting the upper and lower 3/4 circular silicon steel sheets (4211), the center of the circular unit (421) is provided with a through hole with a diameter of 1mm, and the electrode (422) and the pulse voltage generating device (41) are electrically connected.
7. A method of printing magnetic material according to the apparatus for 3D printing magnetic material of any of claims 1-6, characterized by the following steps:
the first step is as follows: designing a three-dimensional model of the part by using three-dimensional software including Pro/E;
the second step is that: slicing processing and magnetic field arrangement are carried out by using slicing software, and files are stored;
the third step: the file is imported into a computer control center (1) and a printer head (34) is controlled to start printing;
the fourth step: when n layers are printed, wherein n is more than 1, starting the magnetizing system (4), and starting point-by-point magnetizing by a magnetizing head (42);
the fifth step: after the magnetization is finished, the magnetizing head (42) returns to the position with X =0, and the printing head (34) starts to continue printing;
and a sixth step: repeating the fourth step and the fifth step until all printing and magnetizing processes are finished;
the seventh step: and finishing printing after final treatment.
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| CN109605733B (en) * | 2019-01-24 | 2021-05-04 | 中国科学院宁波材料技术与工程研究所 | Magnetic material 3D printing apparatus |
| CN112908675A (en) * | 2021-01-26 | 2021-06-04 | 宁波磁性材料应用技术创新中心有限公司 | Equipment for custom manufacturing magnet, use method thereof and automatic vending machine |
| KR20220170362A (en) * | 2021-06-22 | 2022-12-29 | 한국생산기술연구원 | Method of manufacturing a Re-Fe-B magnet using 3D printing |
| CN113927696A (en) * | 2021-08-30 | 2022-01-14 | 广东电网有限责任公司广州供电局 | Sand table 3D printer |
| CN114013034B (en) * | 2021-10-22 | 2023-06-16 | 中国林业科学研究院林业新技术研究所 | Adhesive injection molding all-in-one machine based on wood fiber biomass material |
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