CN113102777A - Device and method for improving utilization rate of powder produced by additive manufacturing of powder feeding metal - Google Patents
Device and method for improving utilization rate of powder produced by additive manufacturing of powder feeding metal Download PDFInfo
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- CN113102777A CN113102777A CN202110336595.8A CN202110336595A CN113102777A CN 113102777 A CN113102777 A CN 113102777A CN 202110336595 A CN202110336595 A CN 202110336595A CN 113102777 A CN113102777 A CN 113102777A
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- additive manufacturing
- filter screen
- residual
- collecting tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2230/00—Specific aspects relating to the whole B07B subclass
- B07B2230/04—The screen or the screened materials being subjected to ultrasonic vibration
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a device and a method for improving the utilization rate of metal additive manufacturing powder of lower powder feeding. Conveyer and surplus powder filter equipment are located print platform top and below respectively, and conveyer and scraper are installed on same slide rail, can reciprocate linear motion on print platform to can carry out elevating movement, the device send powder printer structure overall arrangement under not changing the tradition. The powder bed additive manufacturing device can automatically filter and circulate the excessive metal powder generated in the powder bed additive manufacturing in the lower powder feeding mode, improve the powder utilization rate of the lower powder feeding metal additive manufacturing, save the metal additive manufacturing cost, and avoid the influence of the opening and powder adding processes on the product quality due to the interruption of the printing process caused by insufficient powder.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of lower powder feeding powder bed type metal additive manufacturing, and particularly relates to a device and a method for improving the utilization rate of lower powder feeding metal additive manufacturing powder.
[ background of the invention ]
The lower powder feeding powder bed type metal additive manufacturing is a process of taking metal powder as a printing raw material, firstly generating a three-dimensional CAD model of a part in a computer, slicing and layering the part through software, sintering the metal powder in a specific area by using the high temperature of a laser beam, and stacking and forming the part layer by layer. Specifically, before laser beam starts scanning, a powder spreading device firstly spreads metal powder in a raw material cylinder on a substrate of a forming cylinder, the laser beam selectively melts the metal powder on the substrate according to a filling contour line of a current layer to process the current layer, then the forming cylinder descends by a layer thickness distance, the raw material cylinder ascends by a certain distance, the powder spreading device spreads the metal powder on the processed current layer, and the layer-by-layer processing is carried out until the whole part is processed.
In the traditional lower powder feeding metal additive manufacturing process, in order to ensure that powder in a forming cylinder is uniformly and completely spread, the volume of the powder in a raw material cylinder is at least 150% of the volume of the powder required in the forming cylinder, the powder is excessive in the powder spreading process, the excessive powder is scraped into a residual powder cylinder by a scraper, and the excessive powder is filtered after printing is finished and then is recycled in the next printing process. The mode leads the required raw material metal powder to be more in quantity, and inevitably causes powder pollution to influence the quality of processed products.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a device and a method for improving the utilization rate of powder manufactured by a lower powder feeding metal additive, so as to solve the problems of low utilization rate and high waste of the powder manufactured by the lower powder feeding metal additive in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the device for improving the utilization rate of the additive manufacturing powder of the lower powder feeding metal is characterized by comprising a printer shell, wherein a printing platform and a sliding rail are arranged in the printer shell, and the sliding rail is arranged above the printing platform; the lower part of the printing platform is sequentially provided with a raw material cylinder, a forming cylinder and a residual powder filtering device from front to back, and the upper part of the printing platform is provided with a scraper;
the lower part of the residual powder filtering device is provided with a powder feeder which is communicated with a residual powder collecting tank through a powder feeding pipeline, the upper end of the residual powder collecting tank is connected with an electric push rod device, and the upper end of the electric push rod device is connected with a conveying device; the scraper and the residual powder collecting tank move on the sliding rail through the conveying device.
The invention is further improved in that:
preferably, a first-stage filter screen and a second-stage filter screen are arranged in the residual powder filter device, and the lower part of the residual powder filter device is communicated with the powder feeder.
Preferably, the mesh number of the first-stage filter screen is the same as that of the second-stage filter screen; the front end of the first-stage filter screen is higher than the rear end, and the front end of the second-stage filter screen is higher than the rear end; the rear ends of the first-stage filter screen and the second-stage filter screen are both led into a waste powder tank, and the waste powder tank is arranged on the residual powder filtering device.
Preferably, the first-stage filter screen and the second-stage filter screen are clamped inside the residual powder filter device, and the waste powder tank is clamped outside the rear side wall of the residual powder filter device.
Preferably, an ultrasonic vibrator is arranged on the outer side of the front side wall of the residual powder filtering device and is electrically connected with the primary filter screen, and the ultrasonic vibrator is electrically connected with the secondary filter screen.
Preferably, argon is introduced into the air supply pipeline.
Preferably, the outer side wall of the residual powder collecting tank is provided with a hole.
Preferably, the conveying device comprises a collecting tank transverse operation device and a scraper transverse conveying device, the residual powder collecting tank is connected with the collecting tank transverse operation device, and the scraper is connected with the scraper transverse conveying device.
Preferably, two sector gears which are meshed with each other are arranged inside the residual powder collecting tank.
A working method of the device for improving the utilization rate of the powder produced by the additive manufacturing of the lower powder feeding metal,
in the additive manufacturing process of the lower powder feeding metal additive manufacturing device, when the powder amount of a raw material cylinder in the additive manufacturing device is insufficient, the scraper pushes redundant powder into the residual powder filtering device, the filtered powder enters the powder feeder, and the powder in the powder feeder is fed into the residual powder collecting tank through the powder feeding pipeline;
the scraper gets back to initial position, and former feed cylinder descends, and the clout collecting tank passes through the conveyer and moves to former feed cylinder top, and electric putter device drives the clout powder collecting tank and descends to former feed cylinder in, and the clout powder collecting tank releases the powder behind former feed cylinder, and hydraulic means rises the clout powder collecting tank, and the clout collecting tank passes through conveyer initial position, and the former feed cylinder begins to print after with the powder flattening.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a device for improving the utilization rate of metal additive manufacturing powder by feeding powder downwards. Conveyer and surplus powder filter equipment are located print platform top and below respectively, and conveyer and scraper are installed on same slide rail, can reciprocate linear motion on print platform to can carry out elevating movement, the device send powder printer structure overall arrangement under not changing the tradition. The powder bed additive manufacturing device can automatically filter and circulate the excessive metal powder generated in the powder bed additive manufacturing in the lower powder feeding mode, improve the powder utilization rate of the lower powder feeding metal additive manufacturing, save the metal additive manufacturing cost, and avoid the influence of the opening and powder adding processes on the product quality due to the interruption of the printing process caused by insufficient powder.
Furthermore, be provided with multistage filter screen among the surplus powder filter equipment, can carry out abundant filtration with the irregular powder sediment, the bonding large granule, the oxidation granule that produce among the printing process, collect the powder that meets the requirements in the powder feeder.
Furthermore, the mesh number of the first-stage filter screen and the mesh number of the second-stage filter screen are the same, and the actual mesh number can be selected according to the particle size requirement of additive manufacturing powder; the one-level filter screen and the second grade filter screen are all set up to the slope structure, guarantee to filter out the large granule that filters and can slide in to useless whitewashed jar.
Furthermore, the residual powder filtering device is provided with an ultrasonic vibrator, and the screening efficiency of the filter screen is improved through ultrasonic vibration.
Further, argon is introduced into the air supply pipeline, the argon is used as a carrier, and the powder is sent into a residual powder collecting tank.
Furthermore, the residual powder collecting tank is provided with holes, so that the carrier gas argon for powder feeding can be transmitted out.
The invention also discloses a working method of the device for improving the utilization rate of the metal additive manufacturing powder by lower powder feeding, the method scrapes the surplus powder generated in the powder laying process into the surplus powder filtering device through a scraper, the filtered metal powder is sent into the surplus powder collecting tank above through the powder feeder, when the powder in the raw material cylinder is used up, the raw material cylinder is lowered under the condition of not opening the cabin door, and then the treated surplus powder is added into the raw material cylinder through the conveying device for powder recycling.
[ description of the drawings ]
FIG. 1 is a front view of the overall structure in an embodiment of the invention;
FIG. 2 is a schematic structural view of the discharging in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a conventional lower powder feeding and spreading type metal 3D printer;
FIG. 4 is a schematic view showing the up-and-down movement of the residual powder tank in the embodiment of the present invention;
wherein, the figure (a) is a schematic structural diagram without adding powder; (b) the figure is a schematic structural diagram of powder adding;
FIG. 5 is a schematic view of a track and transport device;
FIG. 6 is a block diagram of a residual powder collecting tank in an embodiment of the present invention;
wherein, the figure (a) is a structural diagram without adding powder, and the figure (b) is a structural diagram with adding powder;
in fig. 1: 1-slide rail, 2-scraper, 3-printing platform, 4-printer housing, 5-raw material cylinder, 6-ultrasonic vibrator, 7-forming cylinder, 8-transport device, 9-residual powder collecting tank, 10-residual powder filtering device, 11-primary filter screen, 12-secondary filter screen, 13-waste powder tank, 14-powder feeding pipe, 15-powder feeder, 16-powder overflow tank, 17-side wall, 18-sector gear, 19-active connecting bearing, 20-connecting rod, 21-bottom baffle, 22-metal powder collecting tank, 23-electric push rod device, 24-scraper transverse transport device, 25-collecting tank transverse transport device, 27-roller, 23-1-screw rod, 23-2-rotating nut, 23-3-push rod, 23-4-fixing frame, 23-5-rotating motor, 24-1-transport connecting rod, 24-2-connecting rod and 25-1-transport frame.
[ detailed description ] embodiments
The invention is described in further detail below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a device for improving the utilization rate of metal additive manufacturing powder by feeding powder downwards, which comprises a residual powder filtering device 10, a conveying device and a residual powder collecting tank 9. The conveying device 8 and the residual powder filtering device 10 are positioned on one side of the forming cylinder 7 of the traditional lower powder feeding printer, and the conveying device 8 and the residual powder filtering device 10 are respectively positioned above and below the printing platform 3.
Referring to fig. 3, the structural schematic diagram of a conventional lower powder feeding and spreading type metal 3D printer is shown, in the diagram, it can be seen that the lower powder feeding metal additive manufacturing device includes a printer housing 4, a raw material cylinder 5, a forming cylinder 7 and a metal powder collecting tank 22 are sequentially arranged in the printer housing 4 along the length direction of the printer housing, a printing platform 3 is arranged on the upper portion of the printer housing 4, a scraper 2 is arranged above the printing platform 3, the scraper 2 can make reciprocating linear motion along the printing platform 3, and the powder on the printing platform 3 can be pushed into the metal powder collecting tank 22 as the scraper 2 moves forward in the direction of the metal powder collecting tank 22.
Referring to fig. 1 and 2, the sliding rail 1 is arranged above the original printing platform 3, the sliding rail 1 is arranged along the length direction of the printer housing 4, and two ends of the sliding rail 1 are fixedly connected with the side wall of the printer housing 4.
Referring to fig. 1, the material cylinder 5 is set to be front on one side and the forming cylinder 7 is set to be rear on one side, and the words relating to the orientation in the present invention are based on these words and will not be described in detail below.
In the scheme of the invention, an original powder overflow tank 16 is replaced by a residual powder filtering device 10, namely the residual powder filtering device 10 is arranged below a printing platform 3 and inside a printer shell 4, the residual powder filtering device 10 comprises a shell and a multi-stage filter screen, an ultrasonic vibrator 6 and a waste powder tank 13 are arranged on the residual powder filtering device 10, a powder feeder 15 is arranged at the lower part of the residual powder filtering device 10, and the powder feeder 15 is communicated with a residual powder collecting tank 9 through a powder feeding pipeline 14.
Specifically, the multistage filter screen is connected to the housing of the remaining powder filtering device 10 through a clamping groove. The multistage filter screen includes one-level filter screen 11 and second grade filter screen 12, and one-level filter screen 11 is in the top of second grade filter screen 12, and second grade filter screen 12 sets up the top at powder feeder 15. The front end of the first-stage filter screen 11 is connected with the front side wall of the residual powder filter device 10 in a clamping manner, the rear end of the first-stage filter screen 11 is connected with the rear side wall of the residual powder filter device 10 in a clamping manner, the front end of the first-stage filter screen 11 is higher than the rear end of the first-stage filter screen, and the rear end of the first-stage filter screen 11 penetrates through the rear side wall of the residual powder filter device 10 and is introduced into the waste powder tank 13; the front end of the secondary filter screen 12 is connected with the front side wall of the residual powder filter device 10 in a clamping manner, the rear end of the secondary filter screen is connected with the rear side wall of the residual powder filter device 10 in a clamping manner, the front end of the secondary filter screen 12 is higher than the rear end of the secondary filter screen, and the rear end of the secondary filter screen 12 penetrates through the rear side wall of the residual powder filter device 10 and is introduced into the waste powder tank 13; the primary filter screen 11 and the secondary filter screen 12 are arranged inside the residual powder filter device 10 in a clamped mode, so that the filter screens can be detached and are convenient to replace, the mesh number of the primary filter screen 11 is the same as that of the secondary filter screen 12, and powder such as irregular powder slag, large bonding particles and oxidized particles generated in the printing process is collected into the waste powder tank 13 through the multi-stage filter screens; the waste powder tank 13 is arranged on the rear side wall of the residual powder filtering device 10 through a clamping groove; the ultrasonic vibrator 6 is arranged on a front side shell of the residual powder filtering device in a threaded connection mode, the ultrasonic vibrator 6 is connected with two vibrating pieces through a lead, and the vibrating pieces are respectively arranged on the primary filter screen 11 and the secondary filter screen 12; the powder feeder 15 is positioned right below the secondary filter screen 12, the powder feeder 15 is communicated with the lower part of the residual powder filtering device 10, argon is used as a powder carrier for the powder feeder 15, and the filtered powder is conveyed into the residual powder collecting tank 9 through a powder conveying pipeline 14. The powder feeder 15 is internally provided with a fan, an air inlet of the powder feeder 15 is communicated with a powder outlet at the lower end of the residual powder filtering device 10, and an air outlet of the powder feeder 15 is communicated with an inlet of the powder feeding pipeline 14.
Referring to fig. 5, the transportation device 8 comprises a scraper transverse transportation device 24 and a collection tank transverse transportation device 25, the scraper transverse transportation device 24 comprises two transportation connecting rods 24-1 set in parallel and four rollers 27, the same sides of the two transportation connecting rods 24-1 are connected to a connecting rod 24-2 together, and two ends of each connecting rod 24-2 are respectively connected with one roller 27. The two transport connecting rods 24-1 are perpendicular to the sliding rail 1, the connecting rod 24-2 is parallel to the sliding rail 1, the two rollers 27 on the same side slide on one sliding rail 1, and the two transport connecting rods 24-1 are fixedly connected with the upper end of the scraper 2; the collecting tank transverse transporting device 25 comprises a transporting frame 25-1, two sides of the transporting frame 25-1 are respectively and rotatably connected with two rollers 27, the lower end of the transporting frame 25-1 is fixedly connected with an electric push rod device 23, the lower end of the electric push rod device 23 is fixedly connected with the residual powder collecting tank 9, and four rollers of the collecting tank transverse transporting device 25 can drive the collecting tank transverse transporting device 25 to move on the sliding rail 1.
Referring to fig. 4, the electric push rod device 23 includes a rotary motor 23-5, a fixing frame 23-4, a push rod 23-3, a screw rod 23-1 and a rotary nut 23-2. The fixed frame 23-4 is fixedly connected with the transportation frame 25-1, the fixed frame 23-4 is positioned at the lower end of the transportation frame 25-1, the upper end of the screw 23-1 is fixedly connected with the fixed frame 23-4, and the lower end of the screw 23-1 is connected with the push rod 23-3 through the rotating nut 23-2, so that the rotating nut 23-2 can rotate around the screw 23-1 and further move up and down along the axial direction of the screw 23-1, and the push rod 23-3 can move along the screw 23-1 because the rotating nut 23-2 is connected with the push rod 23-3. The rotating motor 23-5 is fixedly arranged on the fixed frame 23-4; the lower end of the push rod 23-3 is fixedly connected with the shell of the excess material collecting tank 9. The output end of the rotating motor 23-5 is connected with the push rod 23-3 to drive the push rod 23-3 to rotate forward and move downward, and when the push rod rotates reversely, the push rod moves upward.
Referring to fig. 6, the shell of the residual powder collecting tank 9 includes side walls 17 and a bottom baffle 21, the upper ends of the two side walls 17 are fixedly connected to the lower end of a push rod 23-3 in an electric push rod device 23, so that the residual powder collecting tank 9 can move up and down along with the electric push rod device 23, the lower end of each side wall 17 is connected to the bottom baffle 21 through a hinge, and the bottom baffle 21 can rotate around the lower end of the side wall 17.
The inside device of surplus powder collecting tank 9 is located the below of electric putter device 23, and the shell seals, prevents that the powder from getting into mechanical inside, and the shell of surplus powder collecting tank 9 includes two lateral walls 17 and two bottom baffles 21, lateral wall 17 is the shape of buckling, and the bottom baffle 21 of each lateral wall 17 rotate to be connected. The internal device of the residual powder collecting tank 9 is provided with a sector gear 18 which comprises two mutually meshed gears, the gears are connected to a main shaft through a bearing 19, the other end of the main shaft is connected with a motor, the motor is fixed on the rear wall of the residual powder collecting tank 9, one end of a connecting rod 20 is fixedly connected with the edge of the gear, the other end of the connecting rod 20 is fixedly connected with a bottom baffle 21, the bottom baffle 21 is hinged with a side wall 17, and the bottom baffle 21 is rotated to open and close. When the motor rotates forwards, the main shaft rotates forwards to drive the sector gear 18 to rotate downwards, the sector gear 18 drives the connecting rod 20 to move outwards, the connecting rod 20 drives the bottom baffle 21 to rotate, open and close by taking the connecting hinge as a center, and the bottom of the whole residual powder collecting tank 9 is opened. When the motor rotates reversely, the main shaft rotates positively to drive the sector gear 18 to rotate upwards, the sector gear 18 drives the connecting rod to move inwards, the connecting rod 20 drives the bottom baffle 21 to rotate and close around the connecting hinge, and the whole residual powder collecting tank 9 is closed.
Surplus powder collecting tank 9 sets up in surplus powder filter equipment 10's top, and the outer wall of surplus powder collecting tank 9 adopts nanometer porous metal material, send powder carrier argon gas can follow the intracavity of outer wall discharge to the printer, and in metal powder was collected surplus powder collecting tank 9, the argon gas of intracavity was discharged through printer upper portion wind gap.
With reference to fig. 1, 2 and 3, the working process of the above device is as follows:
the raw material cylinder 5 rises to a certain height, the forming cylinder 7 descends by one layer thickness, the scraper 2 moves from front to back, powder in the raw material cylinder 5 is paved into the forming cylinder 7, redundant powder is scraped into the residual powder filtering device 10, the scraper 2 returns to the initial position (shown as the position in figure 1), the laser beam selectively melts metal powder on the substrate according to the filling contour line of the current layer, the current layer is processed, formed parts are stacked layer by layer until the powder in the raw material cylinder 5 is used up, the scraper 2 is stopped at the initial position (shown as the position in figure 1), and the residual powder filtering device 10 is started.
The excessive powder enters a residual powder filtering device 10 and is filtered by a multistage filter screen at first, an ultrasonic vibrator 6 is connected with the multistage filter screen through a lead in the filtering process, the screening efficiency is improved through ultrasonic vibration and a certain inclination angle of the screen, and the powder such as irregular powder slag, bonding large particles, oxidation particles and the like generated in the printing process is collected into a waste powder tank 13; the powder feeder 15 is positioned under the multi-stage filter screen and conveys the filtered powder to the residual powder collecting tank 9 through a powder conveying pipeline 14.
The outlet of the powder feeding pipeline 14 is arranged on the upper end face of the residual powder collecting tank 9, and the powder filtered by the residual powder filtering device 10 is stored in the residual powder collecting tank 9. When the powder in the raw material cylinder 5 is used up, under the condition of not opening the hatch door, the scraper 2 is stopped at the front side of the raw material cylinder 5 and the raw material cylinder 5 is lowered, the conveying device 8 moves right above the raw material cylinder, then the residual powder collecting tank 9 is lowered into the raw material cylinder 5 through the conveying device 8, the bottom baffle is opened by the internal device of the residual powder collecting tank 9, the moving device gradually rises to add the filtered residual powder into the raw material cylinder, and the falling of the powder is prevented from flying. After the metal powder all fell into raw materials jar, the remaining powder collecting tank 9 internal installation closed bottom baffle 21, rose the top with remaining powder collecting tank through the conveyer, and the conveyer moves back to initial position, continues to print after raw materials jar 5 with the powder flattening.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The device for improving the utilization rate of the additive manufacturing powder of the lower powder feeding metal is characterized by comprising a printer shell (4), wherein a printing platform (3) and a sliding rail (1) are arranged in the printer shell (4), and the sliding rail (1) is arranged above the printing platform (3); the lower part of the printing platform (3) is sequentially provided with a raw material cylinder (5), a forming cylinder (7) and a residual powder filtering device (10) from front to back, and the upper part of the printing platform (3) is provided with a scraper (2);
a powder feeder (15) is arranged at the lower part of the residual powder filtering device (10), the powder feeder (15) is communicated with a residual powder collecting tank (9) through a powder feeding pipeline (14), the upper end of the residual powder collecting tank (9) is connected with an electric push rod device (23), and the upper end of the electric push rod device (23) is connected with a conveying device (8); scraper (2) and surplus powder collecting tank (9) all move on slide rail (1) through conveyer (8).
2. The device for improving the utilization rate of the metal additive manufacturing powder fed downwards according to the claim 1, characterized in that a primary filter screen (11) and a secondary filter screen (12) are arranged in the residual powder filter device (10), and the lower part of the residual powder filter device (10) is communicated with the powder feeder (15).
3. The device for improving the utilization rate of the bottom feeding metal additive manufacturing powder according to claim 2, wherein the mesh number of the primary filter screen (11) is the same as that of the secondary filter screen (12); the front end of the first-stage filter screen (11) is higher than the rear end, and the front end of the second-stage filter screen (12) is higher than the rear end; the rear ends of the first-stage filter screen (11) and the second-stage filter screen (12) are communicated into a waste powder tank (13), and the waste powder tank (13) is arranged on the residual powder filtering device (10).
4. The device for improving the utilization rate of the metal additive manufacturing powder fed downwards according to the claim 3, characterized in that the primary filter screen (11) and the secondary filter screen (12) are clamped inside the residual powder filter device (10), and the waste powder tank (13) is clamped outside the rear side wall of the residual powder filter device (10).
5. The device for improving the utilization rate of the metal additive manufacturing powder fed downwards according to the claim 2, characterized in that the ultrasonic vibrator (6) is arranged on the outer side of the front side wall of the residual powder filtering device (10), the ultrasonic vibrator (6) is electrically connected with the primary filter screen (11), and the ultrasonic vibrator (6) is electrically connected with the secondary filter screen (12).
6. The device for improving the utilization rate of bottom feeding metal additive manufacturing powder according to claim 1, wherein argon gas is introduced into the air supply pipeline (14).
7. The device for improving the utilization rate of the metal additive manufacturing powder fed downwards according to the claim 1, characterized in that the outer side wall of the residual powder collecting tank (9) is provided with holes.
8. The device for improving the utilization rate of bottom feeding metal additive manufacturing powder according to claim 1, characterized in that the transportation device (8) comprises a collection tank transverse running device (25) and a scraper transverse transportation device (24), the residual powder collection tank (9) is connected with the collection tank transverse running device (25), and the scraper (2) is connected with the scraper transverse transportation device (24).
9. The device for improving the utilization rate of bottom feeding metal additive manufacturing powder according to claim 1, characterized in that the inside of the residual powder collecting tank (9) is provided with two mutually meshed sector gears (18).
10. The working method of the device for improving the utilization rate of the bottom feeding powder metal additive manufacturing powder as claimed in claim 1,
in the additive manufacturing process of the lower powder feeding metal additive manufacturing device, when the powder amount of a raw material cylinder (5) in the additive manufacturing device is insufficient, the scraper (2) pushes redundant powder into a residual powder filtering device (10), the filtered powder enters a powder feeder (15), and the powder in the powder feeder (15) is fed into a residual powder collecting tank (9) through a powder feeding pipeline (14);
the scraper (2) returns to the initial position, the raw material cylinder (5) descends, the excess powder collecting tank (9) moves to the upper side of the raw material cylinder (5) through the conveying device (8), the electric push rod device (23) drives the excess powder collecting tank (9) to descend to the raw material cylinder (5), the excess powder collecting tank (9) releases powder to the rear of the raw material cylinder (5), the hydraulic device (23) lifts the excess powder collecting tank (9), the excess powder collecting tank (9) passes through the initial position of the conveying device, and the raw material cylinder (5) levels the powder and then starts to print.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336595.8A CN113102777B (en) | 2021-03-29 | 2021-03-29 | Device and method for improving utilization rate of powder produced by additive manufacturing of powder feeding metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336595.8A CN113102777B (en) | 2021-03-29 | 2021-03-29 | Device and method for improving utilization rate of powder produced by additive manufacturing of powder feeding metal |
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| Publication Number | Publication Date |
|---|---|
| CN113102777A true CN113102777A (en) | 2021-07-13 |
| CN113102777B CN113102777B (en) | 2022-12-06 |
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| CN202110336595.8A Active CN113102777B (en) | 2021-03-29 | 2021-03-29 | Device and method for improving utilization rate of powder produced by additive manufacturing of powder feeding metal |
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Cited By (1)
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