Laser multi-material hybrid fusion apparatus and fusion method

Abstract

The application provides a laser multi-material mixed melting device and a melting method, and relates to the technical field of additive manufacturing. A first feeder is used for taking different materials and mixing them respectively, and a translation assembly is used for moving the first feeder to different positions of a second feeder, so that the first feeder can feed different materials into different mixers in the second feeder; the second feeder discharges the mixed different powders to a forming platform, and a leveling assembly levels the powder layer to make the upper surface of the powder layer flat; a laser assembly melts and forms the powder layer; after a layer of the powder layer is processed and formed, a lifting assembly lowers the height of the layer of the powder layer, and the above forming step is repeated until the product is completed. The laser multi-material mixed melting device can lay different powders with different components at different positions on the forming platform and perform laser forming, and the material components are various, which brings convenience for multi-material printing and material high-throughput preparation and research.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a laser multi-material mixing and melting device and melting method. Background Technology

[0002] In recent years, with the increasingly widespread application of laser powder bed fusion technology, the demand for multi-material printing has been growing. Current laser powder bed fusion technologies mostly use a doctor blade as the powder spreading tool. First, powder is deposited in front of the doctor blade, and then the powder is spread onto the build platform by moving the doctor blade horizontally. However, this method can only spread a single powder composition and cannot flexibly change the powder composition in different areas of the build platform.

[0003] Therefore, there is an urgent need to provide a melting device and melting method that can lay powders of different compositions at different positions on a construction platform and perform laser forming. Summary of the Invention

[0004] The purpose of this invention is to provide a laser multi-material mixing and melting device and method to solve the technical problem that existing laser powder melting technology can only spread powders of a single component. 。

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a laser multi-material mixing and melting device, comprising: a frame assembly; a forming platform slidably disposed on the frame assembly; a lifting assembly disposed on the frame assembly and used to drive the forming platform to move up and down; a feeding assembly for spreading powders of different materials evenly on the forming platform; a leveling assembly for leveling the material powders on the forming platform to make the upper surface of the powder layer flat; and a laser assembly for irradiating the forming platform with a laser to melt the material powders. The feeding assembly includes: a first feeder, a second feeder, and a translation assembly; both the first and second feeders include mixers for mixing the material powders; the first feeder has at least two mixers; the second feeder has multiple mixers arranged in a matrix; the translation assembly drives the first feeder to move horizontally; the first feeder feeds material into the second feeder; and the second feeder feeds material to the forming platform.

[0007] Preferably, the mixer includes: a feed pipe with a feed inlet at the upper end and a discharge outlet at the lower end; a funnel connected to the feed inlet; a stirrer for stirring the material powder in the feed pipe; and a valve body structure disposed in the feed pipe for opening or closing the discharge outlet.

[0008] Preferably, the agitator includes a hollow shaft motor and a hollow rod connected by a drive connection; the hollow shaft motor is positioned above the feed pipe; the hollow rod is located inside the feed pipe; the outer wall of the hollow rod is provided with spiral blades that cooperate with the inner wall of the feed pipe; the valve body structure includes a valve motor, a connecting shaft, a first valve body, and a second valve body; the second valve body cooperates with the discharge port and is provided with a second hole; the second hole is eccentrically positioned relative to the axis of the second valve body; the lower end of the first valve body abuts against the second valve body; the first valve body is eccentrically provided with a first hole for connecting with the second hole; one end of the connecting shaft is connected to the upper end of the first valve body, and the other end passes through the hollow rod and is connected by a drive connection to the valve motor.

[0009] Preferably, the feeding assembly further includes a support frame; the translation assembly includes a first drive mechanism, a second drive mechanism, a first mounting base, and a second mounting base; the first drive mechanism is disposed on the support frame and is used to drive the first mounting base to move along the X-axis; the second drive mechanism is disposed on the first mounting base and is used to drive the second mounting base to move along the Y-axis; the first feeder is disposed on the second mounting base; and the second feeder is disposed on the support frame.

[0010] Preferably, the above further includes a first moving component; the first moving component includes a first lead screw motor and a first guide rod disposed on the frame assembly; both the first lead screw motor and the first guide rod extend along the Y-axis; one end of the support frame is connected to the screw drive of the first lead screw motor, and the other end is slidably connected to the first guide rod.

[0011] Preferably, the leveling assembly includes a grid box and an ultrasonic generator; the grid box is uniformly provided with grid-shaped filter holes, and the material powder falling from the second feeder is dispersed and spread evenly on the forming platform through the filter holes; the grid box is equipped with an ultrasonic generator.

[0012] Preferably, the above further includes a second moving component; the second moving component includes a second lead screw motor and a second guide rod disposed on the frame assembly; both the second lead screw motor and the second guide rod extend along the Y-axis; the grid box is provided with a connecting frame; one end of the connecting frame is connected to the screw drive of the second lead screw motor, and the other end is slidably connected to the second guide rod.

[0013] Preferably, the leveling assembly further includes a pressure plate and an expansion joint for elongation or shortening; one end of the expansion joint is connected to the feeding assembly and the other end is connected to the pressure plate; the pressure plate is used to flatten the powder layer on the forming platform; the pressure plate is equipped with an ultrasonic generator.

[0014] Preferably, the laser component is fixed on the frame assembly; the laser component is located above the feeding assembly and corresponds to the forming platform.

[0015] A method for melting multi-material mixing, comprising the aforementioned laser multi-material mixing and melting apparatus; further comprising the following steps:

[0016] S1. Different material powders are loaded into the first feeder, and the mixer of the first feeder stirs and mixes the material powders.

[0017] S2. The translation component drives the first feeder to move horizontally; the first feeder conveys different material powders to the mixer at different positions of the second feeder;

[0018] S3, the mixer of the second feeder stirs and mixes the material powder; the first moving component drives the second feeder to move to correspond with the forming platform; the second moving component drives the grid box to move to correspond with the forming platform;

[0019] S4. The second feeder discharges the material powder to form a beam; the material powder passes through the grid box, at which time the ultrasonic generator emits ultrasonic waves, causing the material powder to collide with the grid box and disperse evenly, and fall from the filter holes onto the forming platform.

[0020] S5. The first moving component moves the pressure plate to a position corresponding to the forming platform; the second moving component moves the grid box away from the forming platform; the telescopic device moves the pressure plate to squeeze the material powder layer, and at the same time the ultrasonic generator on the pressure plate works.

[0021] S6. The telescopic device moves the pressure plate away from the material powder layer; the first moving component moves the pressure plate away from the forming platform; the laser component irradiates the forming platform with laser light and melts the material powder layer.

[0022] S7. The lifting component drives the molding platform to descend by the thickness of one powder layer.

[0023] S8. Repeat steps S2 to S7 until the product is completed.

[0024] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0025] One aspect of this invention provides a laser multi-material mixing and melting apparatus. A first feeder is used to pick up different materials and mix them separately. A translation component is used to move the first feeder to different positions of a second feeder, facilitating the first feeder to feed different materials into different mixers within the second feeder. The second feeder mixes different powders separately and discharges them to a forming platform. A leveling component then levels the powder layer to ensure a smooth surface. A laser component melts and shapes the powder layer. After one powder layer is formed, a lifting component lowers the height of one powder layer and repeats the above forming steps until the product is completed. This laser multi-material mixing and melting apparatus can place powders of different compositions at different positions on the forming platform and perform laser forming, allowing for diverse material compositions and facilitating multi-material printing, high-throughput material preparation, and research.

[0026] Another aspect of the present invention provides a melting method for mixing multiple materials, in which powders of different materials are placed into a feeding assembly, and subsequent processing steps are automated without human intervention, resulting in high processing accuracy and low labor costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the laser multi-material mixing and melting device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the powder spreading process in an embodiment of the present invention;

[0030] Figure 3 This is a top view of the powder after it has been laid out according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the lifting assembly according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the feeding assembly and pressure plate according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the mixer according to an embodiment of the present invention;

[0034] Figure 7 This is a structural schematic diagram of the grid box according to an embodiment of the present invention.

[0035] Icons: 100, Frame assembly; 110, Support; 120, Construction platform; 1201, Mounting slot; 1202, Limiting component; 200, Molding platform; 300, Lifting assembly; 310, Drive motor; 320, Screw; 330, Drive gear; 340, Driven gear; 400, Feeding assembly; 410, Translation assembly; 4110, First drive mechanism; 41110, Third lead screw motor; 41120, Third guide rod; 41130, First connecting seat; 41140, Second connecting seat; 4120, Second drive mechanism; 41210, Fourth lead screw motor; 41220, Fourth guide rod; 4130, First mounting seat; 4140, Second mounting seat; 420, Mixer; 4210, Feed pipe; 4220, Funnel; 4230, Agitator; 42310, Hollow Shaft Motor; 42320, Hollow Rod; 42321, Fan Blade; 4240, Valve Body Structure; 42410, Valve Motor; 42420, Connecting Shaft; 42430, First Valve Body; 42431, First Hole; 42440, Second Valve Body; 42441, Second Hole; 430, Support Frame; 500, Leveling Assembly; 510, Grille Box; 5101, Filter Hole; 5102, Partition Plate; 520, Ultrasonic Generator; 530, Connecting Frame; 540, Pressure Plate; 550, Telescopic Device; 600, Laser Assembly; 700, First Moving Assembly; 710, First Lead Screw Motor; 720, First Guide Rod; 800, Second Moving Assembly; 810, Second Lead Screw Motor; 820, Second Guide Rod. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] This invention provides a laser multi-material mixing and melting device, referenced Figures 1-5The system includes: a frame assembly 100; a forming platform 200 slidably mounted on the frame assembly 100; a lifting assembly 300 mounted on the frame assembly 100 and used to drive the forming platform 200 up and down; a feeding assembly 400 for spreading powders of different materials evenly on the forming platform 200; a leveling assembly 500 for leveling the powder on the forming platform 200 to make the powder layer surface flat; and a laser assembly 600 for irradiating the forming platform 200 with a laser to melt the powder. The feeding assembly 400 includes a first feeder, a second feeder, and a translation assembly 410. Both the first and second feeders include a mixer 420 for mixing the material powder. The first feeder has at least two mixers 420, and the second feeder has multiple mixers 420 arranged in a matrix. The translation assembly 410 is used to move the first feeder in a horizontal plane. The first feeder is used to feed the material into the second feeder, and the second feeder is used to feed the material to the forming platform 200.

[0038] In some embodiments, reference Figures 1-3 The first feeder can contain four mixers 420, and the second feeder can contain multiple mixers 420, such as 100. The operator loads different material powders into different mixers 420 of the first feeder. The translation component 410 moves the first feeder along the X and Y axes, positioning it above mixers 420 at different locations on the second feeder. Each first and second feeder can be controlled independently. Each mixer 420 mixes only one type of material powder. The second feeder discharges the mixed material powder onto the forming platform 200. The leveling component 500 levels the powder on the forming platform 200 to ensure a smooth powder layer surface. The laser component 600 irradiates and melts the leveled powder layer using laser irradiation. After material formation, the lifting component 300 lowers the forming platform 200 by one powder layer height, repeating the powder spreading and laser forming steps until the product is complete. Figure 3 In this diagram, A, B, C, and D represent different material powders. In summary, the laser multi-material mixing and melting device can lay powders of different compositions at different positions on the forming platform 200 and perform laser forming, resulting in diverse material compositions. This brings convenience to multi-material printing and high-throughput material preparation and research.

[0039] In some embodiments, reference Figure 4The frame assembly 100 may include a bracket 110 and a building platform 120. The bracket 110 supports the building platform 120. The building platform 120 may be provided with a mounting groove 1201, in which the forming platform 200 is slidably disposed. The lifting assembly 300 may include a drive motor 310, a screw 320, a drive gear 330, and a driven gear 340. The drive motor 310 is fixed on the building platform 120, and the shaft of the drive motor 310 is connected to the drive gear 330. The driven gear 340 is rotatably disposed on the building platform 120, and the building platform 120 may be provided with a limiting member 1202 for limiting the driven gear 340. One end of the screw 320 is connected to the forming platform 200, and the other end passes through the building platform 120 and the driven gear 340. The driven gear 340 is provided with a threaded hole that mates with the screw 320. The drive motor 310 drives the active gear 330 to rotate, and the active gear 330 drives the driven gear 340 to rotate. Both the mounting groove 1201 and the forming platform 200 can be square. The mounting groove 1201 can restrict the rotation of the forming platform 200. The screw 320 moves up and down relative to the driven gear 340, thereby realizing the lifting and lowering of the forming platform 200.

[0040] After the material is spread evenly on the forming platform 200, the feeding assembly 400 and the leveling assembly 500 need to be moved relatively away from the forming platform 200, and the laser assembly 600 needs to be aligned with the forming platform 200. In some embodiments, the frame assembly 100 may be equipped with a drive device to move the feeding assembly 400 and the leveling assembly 500, while the laser assembly 600 is fixed on the frame assembly 100. The horizontal position of the laser assembly 600 and the forming platform 200 remains relatively constant. After the material powder is spread evenly on the forming platform 200, the drive device moves the feeding assembly 400 and the leveling assembly 500 away from the forming platform 200, so that the laser assembly 600 can project laser light onto the forming platform 200. In other embodiments, the frame assembly 100 may be equipped with a drive device for driving the molding platform 200 to move horizontally. The horizontal positions of the laser assembly 600, the feeding assembly 400, and the leveling assembly 500 are relatively staggered. After the material powder is spread on the molding platform 200, the drive device drives the molding platform 200 away from the feeding assembly 400 and the leveling assembly 500, so that the laser assembly 600 can project the laser onto the molding platform 200.

[0041] In some embodiments, reference Figure 5 and Figure 6 The mixer 420 includes: a feed pipe 4210 with a feed inlet at the upper end and a discharge outlet at the lower end; a funnel 4220 connected to the feed inlet; a stirrer 4230 for stirring the material powder in the feed pipe 4210; and a valve body structure 4240 disposed in the feed pipe 4210 for opening or closing the discharge outlet.

[0042] In detail, the funnel 4220 in the first feeder has a larger volume, which is convenient for temporarily storing a larger amount of powder material; the funnel 4220 in the second feeder has a smaller cross-sectional area and is mainly used to collect and gather the powder discharged from the first feeder. The powder material enters the feed pipe 4210 from the funnel 4220. At this time, the valve body structure 4240 seals the outlet, and the agitator 4230 stirs and mixes the powder material in the feed pipe 4210, preventing the powder from agglomerating and clumping. When powder needs to be fed into the second feeder, the valve body structure 4240 opens the outlet, and the powder falls from the outlet into the funnel 4220 of the second feeder.

[0043] In some embodiments, reference Figure 5 and Figure 6 The agitator 4230 includes a hollow shaft motor 42310 and a hollow rod 42320 connected by a transmission; the hollow shaft motor 42310 is disposed above the feed pipe 4210; the hollow rod 42320 is located inside the feed pipe 4210; the outer wall of the hollow rod 42320 is provided with a spiral fan blade 42321 that cooperates with the inner wall of the feed pipe 4210; the valve body structure 4240 includes a valve motor 42410, a connecting shaft 42420, a first valve body 42430 and a second valve body 42440; the first The second valve body 42440 is fitted with the discharge port and has a second hole 42441; the second hole 42441 is eccentrically positioned relative to the axis of the second valve body 42440; the lower end of the first valve body 42430 abuts against the second valve body 42440; the first valve body 42430 is eccentrically positioned with a first hole 42431 for connecting the second hole 42441; one end of the connecting shaft 42420 is connected to the upper end of the first valve body 42430, and the other end passes through the hollow rod 42320 and is connected to the valve motor 42410 for transmission.

[0044] In detail, the hollow shaft motor 42310 can be located at the upper end of the feed pipe 4210, the valve motor 42410 can be located at the upper end of the hollow shaft motor 42310, the funnel 4220 is located to the side of the hollow shaft motor 42310, and the funnel 4220 and the feed pipe 4210 can be connected by a thin pipe. The lower end of the feed pipe 4210 can be conical, the second valve body 42440 can be inverted conical, the upper opening of the second hole 42441 is eccentrically set relative to the axis of the second valve body 42440, and the lower opening of the second hole 42441 can be coaxial with the second valve body 42440; the first valve body 42430 can be eccentrically set with the first hole 42431. The valve motor 42410 drives the first valve body 42430 to rotate via the connecting shaft 42420. When the first hole 42431 and the second hole 42441 are misaligned, the valve body structure 4240 seals the outlet. When the first hole 42431 and the second hole 42441 are aligned, the valve body structure 4240 opens the outlet.

[0045] In some embodiments, reference Figure 1 and Figure 5 The feeding assembly 400 also includes a support frame 430; the translation assembly 410 includes a first drive mechanism 4110, a second drive mechanism 4120, a first mounting base 4130, and a second mounting base 4140; the first drive mechanism 4110 is disposed on the support frame 430 and is used to drive the first mounting base 4130 to move along the X-axis; the second drive mechanism 4120 is disposed on the first mounting base 4130 and is used to drive the second mounting base 4140 to move along the Y-axis; the first feeder is disposed on the second mounting base 4140; and the second feeder is disposed on the support frame 430.

[0046] In detail, the first drive mechanism 4110 may include a third lead screw motor 41110, a third guide rod 41120, a first connecting seat 41130, and a second connecting seat 41140. Both the first connecting seat 41130 and the second connecting seat 41140 are mounted on the support frame 430. The first connecting seat 41130 is used to mount the third lead screw motor 41110, and the second connecting seat 41140 has a through hole that mates with the rotating shaft of the third lead screw motor 41110. The third lead screw motor 41110 and the third guide rod 41120 are both arranged along the X-axis. The first mounting seat 4130 is drive-connected to the rotating shaft of the third lead screw motor 41110, and slidably connected to the third guide rod 41120. The second drive mechanism 4120 may include a fourth lead screw motor 41210 and a fourth guide rod 41220 arranged along the Y-axis. The number of the first drive mechanism 4110 and the first mounting seat 4130 can each be a pair. A fourth lead screw motor 41210 is mounted on one of the first mounting seats 4130, and the shaft of the fourth lead screw motor 41210 is rotatably connected to the other first mounting seat 4130. A second mounting seat 4140 is drive-connected to the shaft of the fourth lead screw motor 41210, and is slidably connected to the fourth guide rod 41220. A first drive mechanism 4110 drives a second drive mechanism 4120 to move along the X-axis, and the second drive mechanism 4120 drives a first feeder to move along the Y-axis.

[0047] In some embodiments, reference Figure 1 It also includes a first moving assembly 700; the first moving assembly 700 includes a first lead screw motor 710 and a first guide rod 720 mounted on the frame assembly 100; both the first lead screw motor 710 and the first guide rod 720 extend along the Y-axis; one end of the support frame 430 is drivenly connected to the screw 320 of the first lead screw motor 710, and the other end is slidably connected to the first guide rod 720. Specifically, when the first lead screw motor 710 rotates, the support frame 430 moves along the first guide rod 720. The main function of the first moving assembly 700 is to drive the feeding assembly 400 closer to or further away from the forming platform 200.

[0048] In some embodiments, reference Figure 1 , Figure 2 and Figure 7 The leveling assembly 500 includes a grid box 510 and an ultrasonic generator 520; the grid box 510 is uniformly provided with grid-shaped filter holes 5101, and the material powder falling from the second feeder is dispersed and spread evenly on the forming platform 200 through the filter holes 5101; the grid box 510 is provided with an ultrasonic generator 520.

[0049] Specifically, the projected area of ​​the filter holes 5101 in the grid box 510 is no larger than the area of ​​the forming platform 200. When powder falls onto the grid box 510, the ultrasonic generator 520 emits ultrasonic waves, causing the powder to collide within the grid box 510. The filter holes 5101 are evenly distributed, and the powder stream is evenly dispersed within the filter holes 5101 before finally falling onto the forming platform 200. A partition 5102 is provided in the middle of the grid box 510. Multiple partitions 5102 divide the grid box 510 into multiple small squares. Each small square corresponds to a mixer 420. Different squares are used to transport different material powders, preventing different powders from mixing together.

[0050] In some embodiments, reference Figure 1 and Figure 7 The system also includes a second moving assembly 800; the second moving assembly 800 includes a second lead screw motor 810 and a second guide rod 820 mounted on the frame assembly 100; both the second lead screw motor 810 and the second guide rod 820 extend along the Y-axis; the grid box 510 is provided with a connecting frame 530; one end of the connecting frame 530 is drivenly connected to the screw 320 of the second lead screw motor 810, and the other end is slidably connected to the second guide rod 820. Specifically, the second moving assembly 800 is mainly used to move the grid box 510 closer to or further away from the forming platform 200; the second lead screw motor 810 rotates, and the connecting frame 530 moves along the second guide rod 820.

[0051] In some embodiments, reference Figure 1 and Figure 5 The leveling assembly 500 also includes a pressure plate 540 and a telescoping device 550 for elongation or shortening; one end of the telescoping device 550 is connected to the feeding assembly 400 and the other end is connected to the pressure plate 540; the pressure plate 540 is used to flatten the powder layer on the forming platform 200; the pressure plate 540 is equipped with an ultrasonic generator 520.

[0052] Specifically, the telescopic device 550 can be a hydraulic cylinder or a pneumatic cylinder. When the powder is spread evenly on the forming platform 200, the telescopic device 550 extends to drive the pressure plate 540 to squeeze the powder layer. At the same time, the ultrasonic generator 520 emits ultrasonic waves, causing the pressure plate 540 to vibrate the surface of the powder layer, thereby further flattening the powder layer and ensuring the flatness of the powder layer.

[0053] In some embodiments, reference Figure 1 The laser component 600 is fixed on the frame assembly 100; the laser component 600 is located above the feeding assembly 400 and corresponds to the forming platform 200. Specifically, the distance between the laser component 600 and the forming platform 200 can be 400-500mm, and the distance between the feeding assembly 400 and the forming platform 200 can be 100-150mm. The feeding assembly 400 will not interfere with the laser component 600 when it moves relative to the frame assembly 100.

[0054] A method for melting multi-material mixing, comprising the aforementioned laser multi-material mixing and melting apparatus; further comprising the following steps:

[0055] S1. Different material powders are loaded into the first feeder, and the mixer 420 of the first feeder stirs and mixes the material powders.

[0056] S2, the translation component 410 drives the first feeder to move horizontally; the first feeder conveys different material powders to the mixer 420 at different positions of the second feeder;

[0057] S3, the mixer 420 of the second feeder stirs and mixes the material powder; the first moving component 700 drives the second feeder to move to correspond with the forming platform 200; the second moving component 800 drives the grid box 510 to move to correspond with the forming platform 200;

[0058] The bar screen 510 is located below the second feeder;

[0059] S4. The second feeder discharges the material powder to form a beam. The material powder passes through the grid box 510. At this time, the ultrasonic generator 520 emits ultrasonic waves, causing the material powder to hit the grid box 510 and disperse evenly, and fall from the filter hole 5101 to the forming platform 200.

[0060] S5. The first moving component 700 moves the pressure plate 540 to correspond to the forming platform 200; the second moving component 800 moves the grid box 510 away from the forming platform 200; the telescopic device 550 moves the pressure plate 540 to extrude the material powder layer, and at the same time the ultrasonic generator 520 on the pressure plate 540 works.

[0061] S6, the telescopic device 550 moves the pressure plate 540 away from the material powder layer; the first moving component 700 moves the pressure plate 540 away from the forming platform 200; the laser component 600 irradiates the forming platform 200 with laser light and melts the material powder layer;

[0062] S7, the lifting component 300 drives the forming platform 200 to descend by the thickness of one powder layer;

[0063] S8. Repeat steps S2 to S7 until the product is completed.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A laser multi-material hybrid fusion apparatus, characterized by, include: Rack components; A forming platform, which is slidably mounted on the frame assembly; A lifting assembly is mounted on the frame assembly and is used to drive the molding platform to move up and down. A feeding assembly, used to spread powders of different materials evenly on the molding platform; A leveling component is used to level the material powder on the forming platform to make the upper surface of the powder layer flat; A laser assembly is used to irradiate the forming platform with a laser and melt the material powder; wherein, The feeding assembly includes: a first feeder, a second feeder, and a translation assembly; both the first feeder and the second feeder include a mixer for mixing material powder; the first feeder has at least two mixers; the second feeder has multiple mixers arranged in a matrix; the translation assembly is used to move the first feeder in a horizontal plane; the first feeder is used to feed material into the second feeder; the second feeder is used to feed material to the forming platform. The mixer includes: The feed pipe has a feed inlet at the top and a discharge outlet at the bottom. A funnel, which is connected to the feed inlet; A stirrer, used to stir the material powder in the feed pipe; A valve body structure is disposed inside the feed pipe and is used to open or close the discharge port; The agitator includes a hollow shaft motor and a hollow rod connected by a transmission; the hollow shaft motor is located above the feed pipe; the hollow rod is located inside the feed pipe; the outer wall of the hollow rod is provided with spiral blades that cooperate with the inner wall of the feed pipe. The valve body structure includes a valve motor, a connecting shaft, a first valve body, and a second valve body; the second valve body mates with the discharge port and has a second hole; the second hole is eccentrically positioned relative to the axis of the second valve body; the lower end of the first valve body abuts against the second valve body; the first valve body has a first hole eccentrically positioned for engaging with the second hole; one end of the connecting shaft is connected to the upper end of the first valve body, and the other end passes through the hollow rod and is connected to the valve motor for transmission.

2. The laser multi-material hybrid fusion apparatus of claim 1, wherein, The feeding assembly further includes a support frame; the translation assembly includes a first driving mechanism, a second driving mechanism, a first mounting base, and a second mounting base; the first driving mechanism is disposed on the support frame and is used to drive the first mounting base to move along the X-axis; the second driving mechanism is disposed on the first mounting base and is used to drive the second mounting base to move along the Y-axis; the first feeder is disposed on the second mounting base; the second feeder is disposed on the support frame.

3. The laser multi-material hybrid fusion apparatus of claim 2, wherein, It also includes a first moving component; the first moving component includes a first lead screw motor and a first guide rod disposed on the frame assembly; both the first lead screw motor and the first guide rod extend along the Y-axis; one end of the support frame is connected to the screw drive of the first lead screw motor, and the other end is slidably connected to the first guide rod.

4. The laser multi-material hybrid fusion apparatus of claim 1, wherein, The leveling assembly includes a grid box and an ultrasonic generator; the grid box is uniformly provided with grid-shaped filter holes, and the material powder falling from the second feeder is dispersed and spread evenly on the forming platform through the filter holes; the grid box is equipped with the ultrasonic generator.

5. The laser multi-material hybrid fusion apparatus of claim 4, wherein, It also includes a second moving component; the second moving component includes a second lead screw motor and a second guide rod disposed on the frame assembly; both the second lead screw motor and the second guide rod extend along the Y-axis; the grid box is provided with a connecting frame; one end of the connecting frame is connected to the screw drive of the second lead screw motor, and the other end is slidably connected to the second guide rod.

6. The laser multi-material hybrid fusion apparatus of claim 4, wherein, The leveling assembly also includes a pressure plate and a telescoping device for elongation or shortening; one end of the telescoping device is connected to the feeding assembly and the other end is connected to the pressure plate; the pressure plate is used to flatten the powder layer on the forming platform; the pressure plate is equipped with the ultrasonic generator.

7. The laser multi-material hybrid fusion apparatus of claim 1, wherein, The laser component is fixed on the frame assembly; the laser component is located above the feeding assembly and corresponds to the forming platform.

8. A multi-material hybrid fusion process characterized by, The apparatus includes the laser multi-material mixing and melting device according to any one of claims 1-7; and further includes the following steps: S1. Different material powders are loaded into the first feeder, and the mixer of the first feeder stirs and mixes the material powders. S2. The translation component drives the first feeder to move horizontally; the first feeder conveys different material powders to the mixer at different positions of the second feeder; S3, the mixer of the second feeder stirs and mixes the material powder; the first moving component drives the second feeder to move to correspond with the forming platform; the second moving component drives the grid box to move to correspond with the forming platform; S4. The second feeder discharges the material powder to form a beam; the material powder passes through the grid box, at which time the ultrasonic generator emits ultrasonic waves, causing the material powder to collide with the grid box and disperse evenly, and fall from the filter holes onto the forming platform. S5. The first moving component moves the pressure plate to a position corresponding to the forming platform; the second moving component moves the grid box away from the forming platform; the telescopic device moves the pressure plate to squeeze the material powder layer, and at the same time the ultrasonic generator on the pressure plate works. S6. The telescopic device moves the pressure plate away from the material powder layer; the first moving component moves the pressure plate away from the forming platform; the laser component irradiates the forming platform with laser light and melts the material powder layer. S7. The lifting component drives the molding platform to descend by the thickness of one powder layer. S8. Repeat steps S2 to S7 until the product is completed.

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