CN112846239B - Powder paving mechanism for large metal 3D printing equipment - Google Patents
Powder paving mechanism for large metal 3D printing equipment Download PDFInfo
- Publication number
- CN112846239B CN112846239B CN202011575683.5A CN202011575683A CN112846239B CN 112846239 B CN112846239 B CN 112846239B CN 202011575683 A CN202011575683 A CN 202011575683A CN 112846239 B CN112846239 B CN 112846239B
- Authority
- CN
- China
- Prior art keywords
- powder
- metal
- spreader
- transfer box
- switch valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a powder paving mechanism for large metal 3D printing equipment, which comprises: at least one storage tank for storing metal powder; the transfer box is of a closed structure and is arranged below the material storage tank; the upper part of the transfer box is connected with the material storage tank through a connecting pipe, and the bottom of the transfer box is provided with a discharge hole; the first switch valve is arranged at a discharge port at the bottom of the transfer box; the powder spreader is used for receiving the metal powder sent out from the discharge port of the transfer box and quantitatively sending the metal powder to the surface of the printing substrate; the powder spreading scraper is used for spreading metal powder sent to the surface of the printing substrate by the powder spreader; the first driving device is used for driving the powder spreading scraper to move back and forth; the second driving device is used for driving the powder spreader to move back and forth; this shop's powder mechanism can avoid the powder raise dust to gush out other parts that pollute 3D printing apparatus.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a powder paving mechanism for large-scale metal 3D printing equipment.
Background
In recent years, due to rapid development of a 3D printing technology (additive manufacturing technology) in the field of industrialization, China has a rapid progress in many leading-edge scientific and technological fields, and a short plate facing processing of complex metal parts is effectively made up.
When 3D printing technology is used to manufacture large metal parts, metal powder needs to be continuously and stably transported to the surface of a printing substrate, and thus, a powder spreading mechanism in 3D printing equipment for large metal parts generally adopts gravity powder feeding and bidirectional powder spreading designs. Fig. 11 and 12 show a conventional powder spreading mechanism, which includes a storage tank 1 'and a powder spreading assembly 2', wherein the powder spreading assembly 2 'includes a material receiving hopper 3', a Y-shaped rotating shaft 4 'disposed below the material receiving hopper 3', and a scraper 5 'disposed below the Y-shaped rotating shaft 4'; during operation, storage tank 1 'sends into a certain amount of metal powder earlier and connects material hopper 3', thereby fall into Y type recess of Y type pivot 4 ', then Y type pivot 4' rotates certain angle, pour the right side at scraper 5 'with partly metal powder in the Y type recess (as figure 11), shop's powder subassembly 2 'moves right after that and is accomplished once by scraper 5' and shop's powder, then Y type pivot 4' rotates certain angle of antiport, pour remaining metal powder in the left side of scraper 5 '(as figure 12), shop's powder subassembly 2 'moves left after that and is accomplished the second by scraper 5' and shop's powder, thereby realize the effect of two-way shop's powder.
However, due to the need of manufacturing large-scale metal parts, the amount of powder conveyed to the receiving hopper 3 ' by the storage tank 1 ' is large, the powder spreading assembly 2 ' of the powder spreading mechanism is of an open structure, a large amount of powder dust is easily generated in the powder conveying process of the storage tank 1 ' to the receiving hopper 3 ', and the powder dust can cause serious pollution to the field lens module of the 3D printing equipment, so that the whole printing effect and efficiency are affected.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide the powder laying mechanism for the large-scale metal 3D printing equipment, which can prevent powder dust from gushing out to pollute other parts of the 3D printing equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a shop's powder mechanism for large-scale metal 3D printing apparatus includes:
at least one storage tank for storing metal powder;
the transfer box is of a closed structure and is arranged below the material storage tank; the upper part of the transfer box is connected with the material storage tank through a connecting pipe, and the bottom of the transfer box is provided with a discharge hole;
the first switch valve is arranged at a discharge port at the bottom of the transfer box;
the powder spreader is used for receiving the metal powder sent out from the discharge port of the transfer box and quantitatively sending the metal powder to the surface of the printing substrate;
the powder spreading scraper is used for spreading metal powder sent to the surface of the printing substrate by the powder spreader;
the first driving device is used for driving the powder spreading scraper to move back and forth;
and the second driving device is used for driving the powder spreader to move back and forth.
In the powder spreading mechanism for the large-scale metal 3D printing equipment, the powder spreader comprises a powder spreader shell with an inner cavity, the top of the powder spreader shell is provided with a feeding port, the feeding port is used for receiving materials from the lower side of the first switch valve, and the bottom of the powder spreader shell is provided with a discharging port; the powder spreader also comprises a powder falling control assembly, and the powder falling control assembly is used for controlling the powder falling amount of the powder falling from the discharging opening.
In the powder laying mechanism for the large-scale metal 3D printing equipment, the powder falling control assembly comprises a powder falling roller and a servo motor, wherein the powder falling roller is rotatably arranged in an inner cavity of the powder laying device shell, and the servo motor is used for driving the powder falling roller to rotate; a plurality of grooves are uniformly formed in the circumferential surface of the powder falling roller along the circumferential direction; the bottom surface of the inner cavity is an arc surface matched with the powder falling roller, the feed opening is communicated to the arc surface, and the powder falling roller and the arc surface are coaxially arranged.
A spread powder mechanism for large-scale metal 3D printing apparatus in, it still includes that a plurality of sets up to spread the powder ware spread the sensor on the powder ware casing, the sensor is used for detecting whether the quantity of the metal powder in the inner chamber of powder ware casing is sufficient.
In the powder spreading mechanism for the large-scale metal 3D printing equipment, the first switch valve comprises a switch valve main body connected to the bottom of the transfer box and a guide seat arranged at the bottom of the switch valve main body; the guide seat is provided with a guide channel which is right opposite to the outlet of the switch valve main body and a flexible baffle piece which is arranged around the guide channel; the lower end of the flexible baffle sheet extends to the position below the guide channel.
Further, the switch valve body comprises an inlet with a large upper end and a small lower end, an outlet connected to the lower end of the inlet, and an annular air bag arranged around the outlet; the annular air bag can block the outlet after being inflated, and is provided with an air tap which extends out of the switch valve main body.
In the powder paving mechanism for the large metal 3D printing equipment, the connecting pipe is connected to the top of the transfer box; the transfer box is provided with at least one side wall which is obliquely arranged; and the projection of the connecting pipe connected with the transfer box, which faces vertically downwards, falls on one of the obliquely arranged side walls.
A shop's powder mechanism for large-scale metal 3D printing apparatus in, a drive arrangement is the linear electric motor module, be connected with a tie-beam between two linear electric motor of linear electric motor module, a drive arrangement drive the tie-beam removes, shop powder ware through many connecting rods with tie-beam fixed connection.
A spread powder mechanism for large-scale metal 3D printing apparatus in, second drive arrangement is the linear electric motor module, two linear electric motors of linear electric motor module respectively through L shape frame with spread the both ends of powder scraper and be connected.
A spread powder mechanism for large-scale metal 3D printing apparatus in, spread the powder scraper and include the metal mount, and with the detachable rubber sword strip of connecting of metal mount.
Has the advantages that:
according to the powder spreading mechanism for the large-scale metal 3D printing equipment, the powder spreader and the powder spreading scraper are driven by the second driving device and the first driving device respectively and can move independently, and the position of the powder spreader during powder falling can be controlled to ensure that metal powder falls on one side of the downstream of the powder spreading scraper in the moving direction every time, so that bidirectional powder spreading can be realized; in addition, through the transfer case that sets up closed structure in storage tank below, in the transfer case was sent into metal powder earlier to the storage tank unloading, lay the powder by the powder ware is spread to metal powder input in the transfer case again, can effectively avoid the powder raise dust to gush out other parts that pollute 3D printing apparatus.
Drawings
Fig. 1 is a perspective view of a powder spreading mechanism for a large-scale metal 3D printing device provided by the invention.
Fig. 2 is a front view of a powder laying mechanism for a large-scale metal 3D printing device provided by the invention.
Fig. 3 is a side view of the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 4 is a perspective view of a transfer box in the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 5 is a cross-sectional view of a transfer box in the powder laying mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 6 is a perspective view of a powder spreader in the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 7 is a cross-sectional view of a powder spreader in the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 8 is a perspective view of a powder spreading scraper in the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 9 is a cross-sectional view of a powder spreading blade in the powder spreading mechanism for the large-scale metal 3D printing device provided by the invention.
Fig. 10 is a schematic diagram of a bi-directional dusting process.
Fig. 11 is a schematic structural view of a conventional powder spreading mechanism.
Fig. 12 is a schematic structural view of a conventional powder spreading mechanism.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The following disclosure provides embodiments or examples for implementing different configurations of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
For convenience of description, the front-back direction in this application refers to a direction in which the powder laying blade moves when laying powder, i.e., the left-right direction in fig. 3; the left-right direction means a direction horizontally perpendicular to the front-rear direction, i.e., the left-right direction in fig. 2.
Referring to fig. 1 to 9, the present invention provides a powder spreading mechanism for a large-scale metal 3D printing apparatus, including:
at least one storage tank 1 for storing metal powder;
the transfer case 2 is of a closed structure and is arranged below the material storage tank 1; the upper part of the transfer case 2 is connected with the material storage tank 1 through a connecting pipe 3, and the bottom of the transfer case 2 is provided with a discharge port 2.1 (see figure 5);
a first switch valve 4 arranged at a discharge port at the bottom of the transit box 2 (see fig. 4);
the powder spreader 5 is used for receiving the metal powder sent out from the discharge port 2.1 of the transfer box 2 and quantitatively sending the metal powder to the surface of the printing substrate;
the powder spreading scraper 6 is used for spreading the metal powder sent to the surface of the printing substrate by the powder spreader 5;
the first driving device 7 is used for driving the powder spreading scraper 6 to move back and forth;
and the second driving device 8 is used for driving the powder spreader 5 to move back and forth.
When the powder spreading mechanism works, metal powder is stored in a storage tank 1, then the metal powder is sent into a transfer box 2 through the storage tank 1, the generated powder raise dust cannot be gushed out due to the fact that the transfer box 2 is of a closed structure, when a powder spreading device 5 moves to the position under the transfer box 2, a first switch valve 4 is opened to enable the metal powder to fall into the powder spreading device 5, then the powder spreading device 5 sends the metal powder to the surface of a printing substrate in a quantitative mode (the action is called as powder falling), before the powder falling, the powder spreading device 5 is moved to the downstream side of the moving direction of a powder spreading scraper 6 through a second driving device 8, then the powder falling is carried out, and therefore bidirectional powder spreading can be achieved; the specific process of bidirectional powder laying can be referred to fig. 10: spread powder scraper 6 and begin to be located the leftmost side in the picture, at this moment, it carries out the powder to spread the position that powder scraper 6 right side is close to spread powder scraper 6 and fall to be moved by second drive arrangement 8 drive powder spreader 5, then first drive arrangement 7 drive powder spreader 6 moves to the right and paves metal powder, accomplish once shop's powder, second drive arrangement 8 drive powder spreader 5 moves to spread the position that powder scraper 6 left side is close to spread powder scraper 6 and falls the powder, then first drive arrangement 7 drive powder spreader 6 moves to the left and paves metal powder, accomplish the second time and pave the powder, thereby realize two-way shop's powder. The powder spreading mechanism can realize bidirectional powder spreading, has simple control logic, and can effectively avoid powder dust from gushing out to pollute other parts of the 3D printing equipment. In addition, because powder spreader 5 and powder spreading scraper 6 can independently remove, at the in-process that powder spreading scraper 6 spread the powder operation, powder spreader 5 can move to transfer case 2 downside and carry out the metal powder and supply to powder spreading scraper 6 need not stop and wait because powder spreader 5 mends the powder, and production continuity is good, and production efficiency is high.
The fact that the transfer box 2 is of a closed structure means that the other parts of the transfer box 2 are closed except for the discharge port 2.1 at the bottom and the connecting port for connecting with the connecting pipe 3.
In this embodiment, the positions of the storage tank 1, the transfer box 2 and the first switch valve 4 are all fixed, and when the metal powder in the powder spreader 5 needs to be supplemented, the storage tank can be moved to the lower side of the first switch valve 4 to receive the material.
It should be understood by those skilled in the art that, in order to avoid collision of the powder spreader 5 and the powder spreading blade 6, the positions of the powder spreader 5 and the powder spreading blade 6 are staggered from each other, and the position of the powder spreader 5 is higher than that of the powder spreading blade 6.
In some embodiments, see fig. 1 and 2, two storage tanks 1 are provided, and the two storage tanks 1 are respectively connected with a transfer box 2 through connecting pipes 3, and the connecting positions on the transfer box 2 are bilaterally symmetrical. In practical application, when large-scale metal parts are manufactured, the width of the surface of the printing substrate is large, so that the width (namely, the size in the left-right direction) of the transfer box 2 is correspondingly large, and by arranging two or more material storage tanks 1, the material storage tanks 1 convey metal powder to the transfer box 2 from different positions in the width direction, so that the height of the metal powder in the transfer box 2 is uniform, and uniform feeding is ensured when the transfer box 2 feeds the powder spreader 5.
In some embodiments, connecting tube 3 is a bellows, which is bendable, thereby requiring less precision in positioning of the centering bin 2 and the accumulator tank 1. But the connection pipe 3 is not limited to the bellows.
Wherein, a second switch valve 9 (as shown in fig. 2 and 3) can be arranged at the connecting pipe 3 to control the on-off of the connecting pipe 3.
Specifically, as shown in fig. 6 and 7, the powder spreader 5 includes a powder spreader housing 5.1 having an inner cavity, a feeding port 5.2 is provided at the top of the powder spreader housing 5.1, the feeding port 5.2 is used for receiving materials from the lower side of the first switch valve 4, and a discharging port 5.3 is provided at the bottom of the powder spreader housing 5.1; the powder spreader 5 further comprises a powder falling control assembly for controlling the powder falling amount of the powder falling from the feed opening 5.3.
In some preferred embodiments, see fig. 6 and 7, the powder drop control assembly comprises a powder drop roller 5.4 rotatably arranged in the inner cavity of the powder spreader housing 5.1, and a servo motor 5.5 for driving the powder drop roller 5.4 to rotate; a plurality of grooves 5.6 are uniformly arranged on the circumferential surface of the powder falling roller 5.4 along the circumferential direction; the bottom surface of the inner cavity of the powder shell 5.1 is an arc surface matched with the powder falling roller 5.4 (the radius of the arc surface is basically the same as that of the powder falling roller 5.4), the discharging opening 5.3 is communicated to the arc surface, and the powder falling roller 5.4 and the arc surface are coaxially arranged. During operation, the metal powder in the powder spreader 5 can get into the recess 5.6 of the roller 5.4 that falls, when recess 5.6 rotated to aim at feed opening 5.3, the powder in the recess 5.6 can drop from feed opening 5.3, because the volume of recess 5.6 is fixed, consequently only need control the turned angle of the roller 5.4 that falls when blanking at every turn, can the accurate control volume that falls, it is thus clear that this control assembly that falls is high to the precision of the volume control of falling powder, and control logic is simple. Wherein, the number and the shape of the grooves 5.6 can be set according to actual needs. The structure of the powder drop control assembly is not limited thereto.
In practical application, if the metal powder in the powder spreader 5 is insufficient, the metal powder may be exhausted in the powder dropping process, so that the printing quality is affected due to insufficient powder dropping amount; to avoid this problem, in some preferred embodiments, see fig. 6 and 7, the powder spreader 5 further comprises several sensors 5.7 arranged on the spreader housing 5.1, which sensors 5.7 are used to detect whether the amount of metal powder in the inner cavity of the spreader housing 5.1 is sufficient. This sensor 5.7 can be laser sensor, infrared sensor, long sound wave sensor etc. when metal powder is sufficient, the high position that is higher than sensor 5.7 on powder top layer, thereby shelter from sensor 5.7, when metal powder is insufficient, the high position that is less than sensor 5.7 on powder top layer, thereby sensor 5.7 do not shelter from, 3D printing apparatus's control system can judge sensor 5 according to sensor 5.7's detected signal whether sheltered from, thereby judge that the metal powder volume in the powder spreader 5 is sufficient, if insufficient, make powder spreader 5 move to the first ooff valve 4 below and connect the material.
Wherein, the number and the position of the sensors 5.7 can be set according to actual needs. Preferably, the sensors 5.7 are provided in plurality and are uniformly arranged in the left-right direction, and as long as one sensor 5.7 detects that the metal powder is insufficient, it is determined that the metal powder in the powder spreader 5 is insufficient, thereby improving reliability.
Preferably, the powder spreader housing 5.1 is composed of an upper part and a lower part, and the upper part and the lower part are detachably connected with each other so as to clean and replace the powder dropping roller 5.4, as shown in fig. 7. When the powder dropping roller 5.4 needs to be replaced or the powder dropping roller 5.4 needs to be cleaned, the upper part and the lower part of the powder spreader shell 5.1 can be disassembled, and then the powder dropping roller 5.4 is taken and placed, so that the powder spreader is convenient and fast to use. In order to further improve the taking and placing of the powder dropping roller 5.4, the cavity of the lower part of the powder spreader shell 5.1 is large in top and small in bottom.
In some embodiments, see fig. 5 and 7, the first on-off valve 4 comprises an on-off valve body 4.1 connected to the bottom of the transfer case 2, and a guide seat 4.2 provided at the bottom of the on-off valve body 4.1; the guide seat 4.2 is provided with a guide channel 4.3 opposite to the outlet 4.6 of the switch valve main body and a flexible baffle 4.4 arranged around the guide channel 4.3; the lower end of the flexible baffle 4.4 extends out below the guide channel 4.3. Through the sheltering from of flexible separation blade 4.4, reduce the clearance between direction passageway 4.3 lower extreme and the powder spreader casing 5.1 top to reduce the probability that the powder spills from this clearance, and flexible separation blade 4.4 even can not destroy powder spreader casing 5.1 with powder spreader casing 5.1 scraping.
Further, the on-off valve body 4.1 includes an inlet 4.5 having a large upper end and a small lower end, an outlet 4.6 connected to a lower end of the inlet 4.5, and an annular air bag 4.7 disposed around the outlet 4.6; the annular air bag 4.7 can block the outlet 4.6 after being inflated, and the annular air bag 4.7 is provided with an air tap which extends out of the switch valve main body. When powder needs to be supplemented into the powder spreader 5, the gas in the annular air bag 4.7 is pumped out from the air nozzle, so that the outlet 4.6 is dredged, after the powder is supplemented, the annular air bag 4.7 is inflated again to block the outlet 4.6, compared with a common switch valve with a valve core or a valve plate, the annular air bag 4.7 cannot be blocked by the powder to stop working (the average particle size of the metal powder is 15-100 mu m, the clamping stagnation of the valve core, the valve plate and other devices is easy to cause), and the reliability is higher.
In this embodiment, the top of the main body 4.1 of the switch valve is connected to the transfer case 2 through a screw, and the top of the main body 4.1 of the switch valve is provided with an annular groove 4.8, as shown in fig. 6, a sealing ring (not shown in the figure) is disposed in the annular groove 4.8 to ensure the sealing performance between the first switch valve 4 and the transfer case 2.
In some preferred embodiments, see fig. 4, 5, a connecting pipe 3 is connected to the top of the transfer case 2; the transfer box 2 is provided with at least one side wall which is obliquely arranged; the vertical downward projection of the connecting port of the connecting pipe 3 connected with the transfer box 2 falls on one of the obliquely arranged side walls. When the powder falls into transfer case 2 from storage tank 1, fall on the lateral wall of slope earlier, follow this lateral wall gliding again, compare with the direct mode that down directly falls into transfer case 2 bottoms from last, the impact to the powder is littleer, and the raise dust of production is littleer. The inclined angle of the inclined side wall needs to be larger than the repose angle of the metal powder, so that the metal powder is prevented from being retained on the side wall.
In some embodiments, as shown in fig. 1 to 3, the first driving device 7 is a linear motor module (including two parallel linear motors), a connection beam 10 is connected between the two linear motors of the linear motor module, the first driving device 7 drives the connection beam 10 to move, and the powder spreader 5 is fixedly connected with the connection beam 10 through a plurality of connection rods 11. The first driving device 7 is not limited to this, and may be, for example, a timing belt module that drives the link beam 10 to move by two timing belts, a chain module that drives the link beam 10 to move by two chains, a lead screw module that drives the link beam 10 to move by two lead screws, or the like.
In some embodiments, see fig. 1-3, the second driving device 8 is a linear motor module (comprising two parallel linear motors), and the two linear motors of the linear motor module are respectively connected with two ends of the dusting scraper 6 through L-shaped frames 12. The structure of the second driving device 8 is not limited to this, and for example, a synchronous belt module that drives the movement of the powder spreading scraper 6 by two synchronous belts, a chain module that drives the movement of the powder spreading scraper 6 by two chains, a screw module that drives the movement of the powder spreading scraper 6 by two screws, and the like are also possible.
Preferably, as shown in fig. 8 and 9, the powder spreading scraper 6 comprises a metal fixing frame 6.1 and a rubber blade 6.2 detachably connected with the metal fixing frame 6.1. The overall strength and rigidity of the powder spreading scraper 6 are improved through the metal fixing frame 6.1, and meanwhile, the flexibility of rubber materials is kept, so that the powder spreading smoothness during powder spreading is ensured, and the straightness of the rubber cutter strip 6.2 is ensured; and when the rubber knife strip 6.2 is excessively worn, the rubber knife strip can be independently replaced, so that the maintenance cost is reduced.
In some embodiments, the rubber blade strip 6.2 is provided with a plurality of waist holes 6.3 extending up and down, and is fixed on the metal fixing frame 6.1 by screws penetrating through the waist holes 6.3, as shown in fig. 8. Therefore, after slight abrasion appears at the lower side of the rubber knife strip 6.2, the position of the rubber knife strip 6.2 can be properly adjusted downwards, and the accuracy of powder spreading thickness is guaranteed.
In a preferred embodiment, the rubber blade strip 6.2 is rubber at the lower part and metal at the upper part, so that the straightness of the rubber blade strip 6.2 can be further ensured.
Wherein, see fig. 9, can set up the lower terminal surface of rubber sword strip 6.2 to "W" type, when the lower extreme of rubber sword strip 6.2 received the extrusion, have more spaces and supply its lower extreme to warp to make the resistance that the lower extreme of rubber sword strip 6.2 warp littleer, the compliance is more moderate, and then is favorable to improving the homogeneity of spreading the powder.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, which are substantially the same as the present invention.
Claims (9)
1. The utility model provides a shop's powder mechanism for large-scale metal 3D printing apparatus which characterized in that includes:
at least one storage tank for storing metal powder;
the transfer box is of a closed structure and is arranged below the material storage tank; the upper part of the transfer box is connected with the material storage tank through a connecting pipe, and the bottom of the transfer box is provided with a discharge hole;
the first switch valve is arranged at a discharge port at the bottom of the transfer box;
the powder spreader is used for receiving the metal powder sent out from the discharge port of the transfer box and quantitatively sending the metal powder to the surface of the printing substrate;
the powder spreading scraper is used for spreading metal powder sent to the surface of the printing substrate by the powder spreader;
the first driving device is used for driving the powder spreading scraper to move back and forth;
the second driving device is used for driving the powder spreader to move back and forth;
the powder spreading scraper comprises a metal fixing frame and a rubber cutter bar detachably connected with the metal fixing frame;
the lower part of the rubber cutter strip is rubber, and the upper part of the rubber cutter strip is metal; the lower end face of the rubber cutter strip is W-shaped.
2. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 1, wherein the powder spreader comprises a powder spreader shell with an inner cavity, a material inlet is formed in the top of the powder spreader shell and used for receiving materials from the lower side of the first switch valve, and a material outlet is formed in the bottom of the powder spreader shell; the powder spreader also comprises a powder falling control assembly, and the powder falling control assembly is used for controlling the powder falling amount of the powder falling from the discharging opening.
3. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 2, wherein the powder falling control assembly comprises a powder falling roller rotatably arranged in an inner cavity of the powder spreader shell, and a servo motor for driving the powder falling roller to rotate; a plurality of grooves are uniformly formed in the circumferential surface of the powder falling roller along the circumferential direction; the bottom surface of the inner cavity is an arc surface matched with the powder falling roller, the feed opening is communicated to the arc surface, and the powder falling roller and the arc surface are coaxially arranged.
4. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 2, wherein the powder spreader further comprises a plurality of sensors arranged on the powder spreader housing, and the sensors are used for detecting whether the amount of metal powder in the inner cavity of the powder spreader housing is sufficient.
5. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 1, wherein the first switch valve comprises a switch valve main body connected to the bottom of the transfer box, and a guide seat arranged at the bottom of the switch valve main body; the guide seat is provided with a guide channel which is over against the outlet of the switch valve main body and a flexible baffle piece which is arranged around the guide channel; the lower end of the flexible baffle sheet extends to the position below the guide channel.
6. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 5, wherein the switch valve main body comprises an inlet with a large upper part and a small lower part, an outlet connected to the lower end of the inlet, and an annular air bag arranged around the outlet; the annular air bag can block the outlet after being inflated, and is provided with an air tap which extends out of the switch valve main body.
7. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 1, wherein the connecting pipe is connected to the top of the transfer box; the transfer box is provided with at least one side wall which is obliquely arranged; and the projection of the connecting pipe connected with the transfer box, which faces vertically downwards, falls on one of the obliquely arranged side walls.
8. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 1, wherein the first driving device is a linear motor module, a connecting beam is connected between two linear motors of the linear motor module, the first driving device drives the connecting beam to move, and the powder spreader is fixedly connected with the connecting beam through a plurality of connecting rods.
9. The powder spreading mechanism for the large-scale metal 3D printing equipment according to claim 1, wherein the second driving device is a linear motor module, and two linear motors of the linear motor module are respectively connected with two ends of the powder spreading scraper through L-shaped frames.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011575683.5A CN112846239B (en) | 2020-12-28 | 2020-12-28 | Powder paving mechanism for large metal 3D printing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011575683.5A CN112846239B (en) | 2020-12-28 | 2020-12-28 | Powder paving mechanism for large metal 3D printing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112846239A CN112846239A (en) | 2021-05-28 |
| CN112846239B true CN112846239B (en) | 2022-08-16 |
Family
ID=75997492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011575683.5A Active CN112846239B (en) | 2020-12-28 | 2020-12-28 | Powder paving mechanism for large metal 3D printing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112846239B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213435A (en) * | 2021-10-08 | 2022-10-21 | 湖南云箭集团有限公司 | 3D prints with supplying whitewashed subassembly fast |
| CN114799222B (en) * | 2021-12-14 | 2024-03-22 | 上海航天设备制造总厂有限公司 | Instant cleaning device and method for inner wall of powder bin of up-falling powder type SLM (selective laser melting) equipment |
| CN114308435B (en) * | 2022-03-08 | 2022-05-27 | 季华实验室 | Spraying powder feeding device |
| CN114603162B (en) * | 2022-03-15 | 2023-10-13 | 浙江机电职业技术学院 | Metal powder paving system applied to 3D double-laser metal printer |
| CN115519122A (en) * | 2022-10-31 | 2022-12-27 | 南京铖联激光科技有限公司 | Powder feeding device for SLM printer |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106696260A (en) * | 2017-03-17 | 2017-05-24 | 南京增材制造研究院发展有限公司 | 3D (three-dimensional) printing powder delivery and paving linkage type bidirectional powder paving device and equipment |
| CN107350471A (en) * | 2017-06-01 | 2017-11-17 | 南京理工大学 | A kind of new powdering system for selective laser fusing former |
| CN108480639A (en) * | 2018-05-30 | 2018-09-04 | 吉林大学 | A kind of power spreading device of electron beam titanium alloy powder melt-shaping |
| CN108622677A (en) * | 2018-05-30 | 2018-10-09 | 苏州倍丰激光科技有限公司 | Continous way powder feeder and powder system without interruption |
| CN109732085A (en) * | 2018-12-13 | 2019-05-10 | 上海航天设备制造总厂有限公司 | A kind of double scraper mixing power spreading devices and application method for 3D printing |
| CN110153411A (en) * | 2019-05-30 | 2019-08-23 | 南京尚吉智能装备科技有限公司 | Dot matrix powdering 3D printing device and Method of printing based on resistance heating |
| CN110560689A (en) * | 2019-09-29 | 2019-12-13 | 西安增材制造国家研究院有限公司 | Continuous circulation powder laying structure and additive manufacturing forming equipment |
| CN110842200A (en) * | 2019-12-18 | 2020-02-28 | 苏州倍丰激光科技有限公司 | Efficient selective laser melting metal 3D printing powder laying system |
| CN111230110A (en) * | 2020-01-23 | 2020-06-05 | 华东理工大学 | Powder management system for SLM equipment |
| CN111360250A (en) * | 2018-12-26 | 2020-07-03 | 沈阳新松机器人自动化股份有限公司 | Flexible scraper device and selective laser melting powder laying device |
| CN111702178A (en) * | 2020-07-29 | 2020-09-25 | 天津清研智束科技有限公司 | Powder paving device and additive manufacturing device |
-
2020
- 2020-12-28 CN CN202011575683.5A patent/CN112846239B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106696260A (en) * | 2017-03-17 | 2017-05-24 | 南京增材制造研究院发展有限公司 | 3D (three-dimensional) printing powder delivery and paving linkage type bidirectional powder paving device and equipment |
| CN107350471A (en) * | 2017-06-01 | 2017-11-17 | 南京理工大学 | A kind of new powdering system for selective laser fusing former |
| CN108480639A (en) * | 2018-05-30 | 2018-09-04 | 吉林大学 | A kind of power spreading device of electron beam titanium alloy powder melt-shaping |
| CN108622677A (en) * | 2018-05-30 | 2018-10-09 | 苏州倍丰激光科技有限公司 | Continous way powder feeder and powder system without interruption |
| CN109732085A (en) * | 2018-12-13 | 2019-05-10 | 上海航天设备制造总厂有限公司 | A kind of double scraper mixing power spreading devices and application method for 3D printing |
| CN111360250A (en) * | 2018-12-26 | 2020-07-03 | 沈阳新松机器人自动化股份有限公司 | Flexible scraper device and selective laser melting powder laying device |
| CN110153411A (en) * | 2019-05-30 | 2019-08-23 | 南京尚吉智能装备科技有限公司 | Dot matrix powdering 3D printing device and Method of printing based on resistance heating |
| CN110560689A (en) * | 2019-09-29 | 2019-12-13 | 西安增材制造国家研究院有限公司 | Continuous circulation powder laying structure and additive manufacturing forming equipment |
| CN110842200A (en) * | 2019-12-18 | 2020-02-28 | 苏州倍丰激光科技有限公司 | Efficient selective laser melting metal 3D printing powder laying system |
| CN111230110A (en) * | 2020-01-23 | 2020-06-05 | 华东理工大学 | Powder management system for SLM equipment |
| CN111702178A (en) * | 2020-07-29 | 2020-09-25 | 天津清研智束科技有限公司 | Powder paving device and additive manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112846239A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112846239B (en) | Powder paving mechanism for large metal 3D printing equipment | |
| CN112830257B (en) | Automatic feeding system | |
| CN106645177B (en) | Battery-shell surface vision-based detection assembly line and its inner subface inspection device | |
| CN101928930B (en) | Vacuum coating machine | |
| WO2023151008A1 (en) | Ultrasonic cleaning device | |
| CN108994297A (en) | Powder feeder device | |
| CN110844541A (en) | Automatic screw feeding machine for product assembly | |
| CN105599928A (en) | High-efficiency device for filling automobile carbon canister with activated carbon | |
| CN113942682B (en) | Bearing conveying device | |
| CN109625952A (en) | Data line female finished conveying device and detection production equipment | |
| CN211197749U (en) | Automatic screw feeding machine for product assembly | |
| WO2023042509A1 (en) | Resin supply apparatus, resin molding system, and method for producing resin molded article | |
| CN219727131U (en) | Extrusion device for plastic product processing | |
| TWI835229B (en) | Resin supply apparatus, resin molding system, and manufacturing method of resin molded product | |
| CN211899677U (en) | Feeding system of building contour forming equipment | |
| CN212018590U (en) | Detection apparatus for detect medicine box surface printing pattern | |
| CN220055325U (en) | Conveying device for packaging instant food | |
| CN220866305U (en) | Conveying equipment suitable for transporting multiple types of materials | |
| CN218402550U (en) | Material distribution equipment | |
| CN216378001U (en) | Turning structure for emptying flange pipe | |
| CN114100905B (en) | Powder spraying and distributing system | |
| CN215477705U (en) | Membrane separating and conveying device with guiding function | |
| CN218538553U (en) | Basic nickel carbonate conveying device | |
| CN219899176U (en) | Discharging equipment for drill bit transportation | |
| CN219842049U (en) | Weightlessness scale |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |