CN110625117A - SLM forming system with two-way powder spreading function - Google Patents
SLM forming system with two-way powder spreading function Download PDFInfo
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- CN110625117A CN110625117A CN201911025906.8A CN201911025906A CN110625117A CN 110625117 A CN110625117 A CN 110625117A CN 201911025906 A CN201911025906 A CN 201911025906A CN 110625117 A CN110625117 A CN 110625117A
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/222—Driving means for motion along a direction orthogonal to the plane of a layer
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/224—Driving means for motion along a direction within the plane of a layer
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/30—Platforms or substrates
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
- B22F12/55—Two or more means for feeding material
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
- B22F12/67—Blades
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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
- 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
- B33Y10/00—Processes of additive manufacturing
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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
- 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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/70—Recycling
- B22F10/73—Recycling of powder
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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to an SLM forming system with a bidirectional powder spreading function, which comprises a machine body, wherein a forming cylinder, two powder feeding mechanisms and a scraper which reciprocates between the two powder feeding mechanisms are arranged on the machine body, the forming cylinder is positioned between the two powder feeding mechanisms, a laser head is arranged above the forming cylinder, a forming platform and a first lifting mechanism which drives the forming platform to lift are arranged on the forming cylinder, the scraper is movably arranged on the machine body through a scraper frame, the forming cylinder is arranged between the two powder feeding cylinders, two times of powder spreading operation on the forming platform can be realized only by driving the scraper to do one reciprocating motion, the powder spreading efficiency is improved, the first powder collecting cylinder and the second powder collecting cylinder play a role in collecting and leveling residual powder after the powder feeding mechanisms, the subsequent recovery of the residual powder is convenient, and the resource saving is facilitated.
Description
Technical Field
The invention relates to the technical field of laser selective melting (SLM) forming equipment, in particular to an SLM forming system with a bidirectional powder spreading function.
Background
Selective Laser Melting (SLM) is one of additive manufacturing techniques that rapidly melt-forms metal powder in a selected area by laser.
An SLM forming system in the prior art mainly includes a powder feeding box, a powder collecting box, a scraper, a forming platform and a laser. The traditional SLM forming system is used for unidirectional powder spreading and sintering of a scraper. In the forming process, the scraper scrapes the powder in the powder feeding box to the forming platform from the original point and lays the powder on the forming platform, the powder is sintered, melted and formed by laser, and the forming platform is lowered by one layer thickness. And then, after the scraper scrapes redundant powder to the powder collecting box, the original path of the powder collecting box returns to the original point, and then the next powder scraping and forming are carried out. And in the stroke of returning the scraper to the original point, the functions of powder laying and laser sintering are not realized. The traditional SLM forming platform has the characteristic of convenience in manufacturing and installation, but the forming system with the structure can only realize one-way powder feeding, and the powder feeding efficiency is relatively low, so that the forming efficiency is relatively low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an SLM forming system with a bidirectional powder spreading function.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a SLM forming system with two-way shop powder function, includes the organism, be equipped with shaping jar, two powder feeding mechanism and reciprocating motion in two on the organism send the scraper between the powder feeding mechanism, the shaping jar is located two send between the powder feeding mechanism, shaping jar top is equipped with the laser head, be equipped with shaping platform and drive on the shaping jar the first elevating system that shaping platform goes up and down, the scraper is in through scraping the mobilizable setting of knife rest on the organism.
Furthermore, the first lifting mechanism comprises a first motor, a first screw rod and a first nut, the top end of the first screw rod penetrates through the bottom of the forming cylinder to be connected with the forming platform, the bottom end of the first screw rod is connected with an output shaft of the first motor, the first nut is fixedly installed at the bottom of the forming cylinder, the first screw rod is in threaded connection with the first nut, and the first motor is connected with the machine body through a first sliding mechanism.
Furthermore, first glide machanism includes first guide rail and first slider, first guide rail is vertical to be established the below of shaping jar, first slider with first guide rail sliding connection, first motor with first slider fixed connection.
Furthermore, the two powder feeding mechanisms are a first powder feeding mechanism and a second powder feeding mechanism which are respectively arranged on two sides of the forming cylinder, the first powder feeding mechanism comprises a first powder feeding cylinder and a first powder feeding plate, the first powder feeding plate is movably arranged inside the first powder feeding cylinder, the second powder feeding mechanism comprises a second powder feeding cylinder and a second powder feeding plate, the second powder feeding plate is movably arranged inside the second powder feeding cylinder, a second lifting mechanism for driving the first powder feeding plate to lift is arranged between the first powder feeding plate and the machine body, and a third lifting mechanism for driving the second powder feeding plate to lift is arranged between the second powder feeding plate and the machine body.
Furthermore, the second lifting mechanism comprises a second motor, a second lead screw and a second nut, the top end of the second lead screw penetrates through the first powder feeding cylinder to be connected with the first powder feeding plate, the bottom end of the second lead screw is connected with an output shaft of the second motor, the second nut is fixedly installed at the bottom of the first powder feeding cylinder, the second lead screw is in threaded connection with the second nut, and the second motor is connected with the machine body through a second sliding mechanism.
Furthermore, the second sliding mechanism comprises a second guide rail and a second sliding block, the second guide rail is vertically arranged below the first powder feeding cylinder, the second sliding block is connected with the second guide rail in a sliding manner, and the second motor is fixedly connected with the second sliding block.
Furthermore, the third lifting mechanism comprises a third motor, a third screw rod and a third nut, the top end of the third screw rod penetrates through the second powder feeding cylinder to be connected with the second powder feeding plate, the bottom end of the third screw rod is connected with an output shaft of the third motor, the third nut is fixedly installed at the bottom of the second powder feeding cylinder, the third screw rod is in threaded connection with the third nut, and the third motor is connected with the machine body through a third sliding mechanism.
Furthermore, the third sliding mechanism comprises a third guide rail and a third sliding block, the third guide rail is vertically arranged below the second powder feeding cylinder, the third sliding block is connected with the third guide rail in a sliding manner, and the third motor is fixedly connected with the third sliding block.
Further, scrape the knife rest with be equipped with reciprocating motion mechanism between the organism to drive the scraper and realize reciprocating motion in two send purpose between the powder mechanism, reciprocating motion mechanism includes fourth motor, fourth lead screw and fourth nut, the fourth motor is transversely established on the organism, the fourth lead screw is connected the output shaft of fourth motor, the fourth nut with scrape knife rest fixed connection, the fourth nut with fourth lead screw threaded connection, scrape the knife rest and connect through fourth glide mechanism the organism, wherein, fourth glide mechanism includes fourth guide rail and fourth slider, the fourth guide rail is transversely established on the organism, the fourth slider with fourth guide rail sliding connection, scrape the knife rest with fourth slider fixed connection.
Furthermore, one side of the first powder feeding cylinder is provided with a first powder collecting cylinder, and one side of the second powder feeding cylinder is provided with a second powder collecting cylinder.
Compared with the prior art, the invention has the beneficial effects that: through establishing the shaping jar between two powder feeding jar, only need the drive scraper to do once reciprocating motion just can realize spreading the powder operation twice to the shaping platform, improved and spread powder efficiency, first receipts powder jar and second receive the powder jar and play the effect of accomodating and filling the surplus powder behind the powder feeding mechanism, make things convenient for follow-up surplus powder of retrieving, be favorable to resources are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an SLM forming system with a bidirectional powder spreading function according to the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 from a first perspective;
FIG. 3 is a schematic diagram of an internal structure of the SLM forming system with the bidirectional powder spreading function;
FIG. 4 is a schematic diagram of the structure of FIG. 1 from a second perspective;
in the figure: 1. a body; 2. a forming cylinder; 3. a scraper; 4. a laser head; 5. a forming platform; 6. a doctor holder; 7. a first powder feeding cylinder; 8. a first powder feeding plate; 9. a second powder feeding cylinder; 10. a second powder feeding plate; 11. a first motor; 12. a first lead screw; 13. a first nut; 14. a first guide rail; 15. a first slider; 16. a second motor; 17. a second lead screw; 18. a second nut; 19. a second guide rail; 20. a second slider; 21. a third motor; 22. a third screw rod; 23. a third nut; 24. a third guide rail; 25. a third slider; 26. a fourth motor; 27. a fourth screw rod; 28. a fourth nut; 29. a fourth guide rail; 30. a fourth slider; 31. a first powder collecting cylinder; 32. and a second powder collecting cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following are specific examples of the present invention:
referring to fig. 1 to 4, an SLM forming system with bidirectional powder spreading function includes a machine body 1, a forming cylinder 2, two powder feeding mechanisms and a scraper 3 reciprocating between the two powder feeding mechanisms are arranged on the machine body 1, the forming cylinder 2 is located between the two powder feeding mechanisms, a laser head 4 is arranged above the forming cylinder 2, the laser head 4 is used for performing laser sintering forming on powder on the forming cylinder 2, a forming platform 5 and a first lifting mechanism driving the forming platform 5 to lift are arranged on the forming cylinder 2, the scraper 3 is movably arranged on the machine body 1 through a scraper frame 6, wherein the scraper 3 is arranged at the bottom of the scraper frame 6, a cutting edge of the scraper 3 is in planar contact with a machine table of the machine body 1, the scraper 3 is used for scraping and feeding powder on the two powder feeding mechanisms onto the forming platform 5, wherein the two powder feeding mechanisms are a first powder feeding mechanism and a second powder feeding mechanism respectively arranged at two sides of the forming cylinder 2, the first powder feeding mechanism comprises a first powder feeding cylinder 7 and a first powder feeding plate 8, the first powder feeding plate 8 is movably arranged inside the first powder feeding cylinder 7, the second powder feeding mechanism comprises a second powder feeding cylinder 9 and a second powder feeding plate 10, the second powder feeding plate 10 is movably arranged inside the second powder feeding cylinder 9, the forming cylinder 2 is arranged between the two powder feeding mechanisms, when the scraper 3 moves from the first powder feeding mechanism to the second powder feeding mechanism, the scraper 3 can scrape powder on the first powder feeding mechanism and feed the powder onto the forming platform 5, when the scraper 3 moves from the second powder feeding mechanism to the first powder feeding mechanism, the scraper 3 can scrape powder on the second powder feeding mechanism and feed the powder onto the forming platform 5, the purpose of bidirectional powder paving is achieved, and the laser sintering forming efficiency is improved.
Referring to fig. 3, the first lifting mechanism includes a first motor 11, a first lead screw 12 and a first nut 13, the top end of the first lead screw 12 passes through the bottom of the forming cylinder 2 and is connected to the forming platform 5, the bottom end of the first lead screw 12 is connected to the output shaft of the first motor 11, the first nut 13 is fixedly installed at the bottom of the forming cylinder 2, the first lead screw 12 is in threaded connection with the first nut 13, the first motor 11 is connected to the machine body 1 through a first sliding mechanism, wherein the first sliding mechanism includes a first guide rail 14 and a first slider 15, the first guide rail 14 is vertically arranged below the forming cylinder 2, the first slider 15 is in sliding connection with the first guide rail 14, the first motor 11 is fixedly connected to the first slider 15, when the first motor 11 drives the first lead screw 12 to rotate, because the first nut 13 is fixedly installed at the bottom of the forming cylinder 2, the rotating first lead screw 12 in threaded connection therewith will be under the sliding action of the first slider 15, do the ascending or descending motion together with first motor 11, and then realize driving the purpose that shaping platform 5 ascended or descended, when needs lay the powder on shaping platform 5, drive first motor 11, make first lead screw 12 drive shaping platform 5 and descend the thickness on a laser printing layer, then drive scraper 3 with the powder scraping in the powder feeding mechanism send to shaping platform 5 on can.
Referring to fig. 1 and 2, a second lifting mechanism for driving the first powder conveying plate 8 to lift is arranged between the first powder conveying plate 8 and the machine body 1, and a third lifting mechanism for driving the second powder conveying plate 10 to lift is arranged between the second powder conveying plate 10 and the machine body 1.
Referring to fig. 2 and 3, the second lifting mechanism includes a second motor 16, a second lead screw 17 and a second nut 18, the top end of the second lead screw 17 passes through the first powder feeding cylinder 7 and is connected with the first powder feeding plate 8, the bottom end of the second lead screw 17 is connected with an output shaft of the second motor 16, the second nut 18 is fixedly installed at the bottom of the first powder feeding cylinder 7, the second lead screw 17 is in threaded connection with the second nut 18, and the second motor 16 is connected with the machine body 1 through a second sliding mechanism.
Preferably, the second sliding mechanism comprises a second guide rail 19 and a second sliding block 20, the second guide rail 19 is vertically arranged below the first powder feeding cylinder 7, the second sliding block 20 is slidably connected with the second guide rail 19, and the second motor 16 is fixedly connected with the second sliding block 20.
Referring to fig. 4, the third lifting mechanism includes a third motor 21, a third screw 22 and a third nut 23, the top end of the third screw 22 passes through the second powder feeding cylinder 9 and is connected to the second powder feeding plate 10, the bottom end of the third screw 22 is connected to an output shaft of the third motor 21, the third nut 23 is fixedly mounted at the bottom of the second powder feeding cylinder 9, the third screw 22 is in threaded connection with the third nut 23, and the third motor 21 is connected to the machine body 1 through a third sliding mechanism.
Preferably, the third sliding mechanism comprises a third guide rail 24 and a third sliding block 25, the third guide rail 24 is vertically arranged below the second powder feeding cylinder 9, the third sliding block 25 is connected with the third guide rail 24 in a sliding manner, and the third motor 21 is fixedly connected with the third sliding block 25.
When powder in the powder feeding mechanism needs to be scraped and conveyed to the forming platform 5, the powder feeding plate in the powder feeding cylinder only needs to be driven to rise by a height, so that the powder in the powder feeding cylinder is exposed out of the machine table plane of the machine body 1, and then the powder exposed out of the machine table plane only needs to be scraped and conveyed to the forming platform 5 by the driving scraper 3, so that the powder feeding purpose can be achieved.
In addition, the specific structure of the first lifting mechanism, the second lifting mechanism and the third lifting mechanism is not limited to the form of matching the motor with the screw-nut mechanism, and a structural form of driving the cylinder to achieve the lifting purpose may also be adopted, for example, the first motor 11, the second motor 16 or the third motor 21 is replaced by the cylinder, the cylinder is fixedly connected with the machine body 1, and then the piston rod of the cylinder is directly connected with the forming platform 5 or the powder feeding plate in the powder feeding mechanism, so that the purpose of driving the forming platform 5 or the powder feeding plate in the powder feeding mechanism to ascend or descend can also be achieved.
Referring to fig. 1, 3 and 4, a reciprocating mechanism is arranged between the scraper frame 6 and the machine body 1 to drive the scraper 3 to reciprocate between the two powder feeding mechanisms, the reciprocating mechanism includes a fourth motor 26, a fourth lead screw 27 and a fourth nut 28, the fourth motor 26 is transversely arranged on the machine body 1, the fourth lead screw 27 is connected with an output shaft of the fourth motor 26, the fourth nut 28 is fixedly connected with the scraper frame 6, the fourth nut 28 is in threaded connection with the fourth lead screw 27, the scraper frame 6 is connected with the machine body 1 through a fourth sliding mechanism, wherein the fourth sliding mechanism includes a fourth guide rail 29 and a fourth slider 30, the fourth guide rail 29 is transversely arranged on the machine body 1, the fourth slider 30 is slidably connected with the fourth guide rail 29, the fourth slider 30 is fixedly connected with the scraper frame 6, the fourth motor 26 drives the fourth lead screw 27 to rotate, and the fourth lead screw 27 can drive the fourth nut 28 to transversely move, therefore, the purpose of driving the scraper 3 to reciprocate between the two powder feeding mechanisms can be realized only by controlling the forward and reverse rotation of the fourth motor 26.
Of course, as for the specific structure of the reciprocating mechanism, a structure form of driving by a cylinder or an oil cylinder can be adopted.
As a preferable solution of the present embodiment, referring to fig. 1 and 3, a first powder collecting cylinder 31 is provided at one side of the first powder feeding cylinder 7, a second powder collecting cylinder 32 is provided at one side of the second powder feeding cylinder 9, and the first powder collecting cylinder 31 and the second powder collecting cylinder 32 are used for collecting powder after filling and leveling the powder feeding mechanism.
The working principle is as follows: when the powder spreading operation is performed on the forming platform 5, firstly, the scraper 3 is stopped between the first powder feeding cylinder 7 and the first powder receiving cylinder 31 through the reciprocating mechanism, then the first motor 11 is controlled to drive the forming platform 5 to descend for a laser printing thickness, then the third motor 21 is controlled to drive the second powder feeding plate 10 to descend for a certain distance so as to leave a concave position for receiving the redundant powder brought by the scraper 3, then the second motor 16 is controlled to drive the first powder feeding plate 8 to ascend for a certain distance so as to expose the upper part of the powder on the first powder feeding plate 8 to the machine platform plane of the machine body 1, then the scraper 3 is driven to scrape the exposed powder onto the forming platform 5 so as to fill the forming platform 5, then the scraper 3 is driven to scrape the redundant powder onto the concave position of the second powder feeding cylinder 9, after the concave position is filled, the scraper 3 is controlled to scrape the residual powder into the second powder receiving cylinder 32, at this point, completing the primary powder paving operation of the forming platform 5, and then performing secondary powder paving operation after the laser head 4 completes laser melting, sintering and printing;
when the powder spreading operation is performed on the forming platform 5 for the second time, the forming platform 5 is controlled to descend by a printing thickness, meanwhile, the first powder conveying plate 8 is controlled to descend by a certain distance to reserve a concave position for accommodating redundant powder brought by the scraper 3, then, the second powder conveying plate 10 is controlled to ascend by a certain distance, the scraper 3 is driven to scrape powder exposed out of the machine table plane on the second powder conveying plate 10 to the forming platform 5, after the forming platform 5 is filled, the redundant powder is continuously scraped to be conveyed to the concave position on the first powder conveying cylinder 7, after the concave position is filled, the residual powder is scraped to be conveyed to the first powder receiving cylinder 31, the powder spreading operation for the second time is completed, the scraper 3 is driven to reciprocate once, the purpose of performing two powder spreading operations on the forming platform 5 can be achieved, and the efficiency is improved.
Compared with the prior art, the beneficial effect of this embodiment: through establishing the shaping jar between two powder feeding jar, only need the drive scraper to do once reciprocating motion just can realize spreading the powder operation twice to the shaping platform, improved and spread powder efficiency, first receipts powder jar and second receive the powder jar and play the effect of accomodating and filling the surplus powder behind the powder feeding mechanism, make things convenient for follow-up surplus powder of retrieving, be favorable to resources are saved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a SLM forming system with two-way shop powder function, a serial communication port, which comprises a bod, be equipped with forming cylinder, two powder feeding mechanism and reciprocating motion in two on the organism send the scraper between the powder feeding mechanism, forming cylinder is located two between the powder feeding mechanism, forming cylinder top is equipped with the laser head, be equipped with forming platform and drive on the forming cylinder the first elevating system that forming platform goes up and down, the scraper is in through scraping the mobilizable setting of knife rest on the organism.
2. The SLM forming system with the bidirectional powder spreading function as claimed in claim 1, wherein the first lifting mechanism comprises a first motor, a first lead screw and a first nut, a top end of the first lead screw penetrates through a bottom of the forming cylinder to be connected with the forming platform, a bottom end of the first lead screw is connected with an output shaft of the first motor, the first nut is fixedly installed at the bottom of the forming cylinder, the first lead screw is in threaded connection with the first nut, and the first motor is connected with the machine body through a first sliding mechanism.
3. The SLM forming system with the bidirectional powder spreading function as claimed in claim 2, wherein the first sliding mechanism comprises a first guide rail and a first sliding block, the first guide rail is vertically arranged below the forming cylinder, the first sliding block is slidably connected with the first guide rail, and the first motor is fixedly connected with the first sliding block.
4. The SLM forming system as claimed in claim 1, wherein the two powder feeding mechanisms are a first powder feeding mechanism and a second powder feeding mechanism respectively disposed at two sides of the forming cylinder, the first powder feeding mechanism includes a first powder feeding cylinder and a first powder feeding plate, the first powder feeding plate is movably disposed inside the first powder feeding cylinder, the second powder feeding mechanism includes a second powder feeding cylinder and a second powder feeding plate, the second powder feeding plate is movably disposed inside the second powder feeding cylinder, a second lifting mechanism for driving the first powder feeding plate to lift is disposed between the first powder feeding plate and the machine body, and a third lifting mechanism for driving the second powder feeding plate to lift is disposed between the second powder feeding plate and the machine body.
5. The SLM forming system with the bidirectional powder spreading function as claimed in claim 4, wherein the second lifting mechanism comprises a second motor, a second screw rod and a second nut, a top end of the second screw rod passes through the first powder feeding cylinder and is connected with the first powder feeding plate, a bottom end of the second screw rod is connected with an output shaft of the second motor, the second nut is fixedly installed at a bottom of the first powder feeding cylinder, the second screw rod is in threaded connection with the second nut, and the second motor is connected with the machine body through a second sliding mechanism.
6. The SLM forming system with the bidirectional powder spreading function as claimed in claim 5, wherein the second sliding mechanism comprises a second guide rail and a second sliding block, the second guide rail is vertically arranged below the first powder feeding cylinder, the second sliding block is slidably connected with the second guide rail, and the second motor is fixedly connected with the second sliding block.
7. The SLM forming system with the bidirectional powder spreading function as claimed in claim 4, wherein the third lifting mechanism includes a third motor, a third screw rod and a third nut, a top end of the third screw rod passes through the second powder feeding cylinder and is connected to the second powder feeding plate, a bottom end of the third screw rod is connected to an output shaft of the third motor, the third nut is fixedly mounted at a bottom of the second powder feeding cylinder, the third screw rod is in threaded connection with the third nut, and the third motor is connected to the machine body through a third sliding mechanism.
8. The SLM forming system with the bidirectional powder spreading function as claimed in claim 7, wherein the third sliding mechanism comprises a third guide rail and a third sliding block, the third guide rail is vertically arranged below the second powder feeding cylinder, the third sliding block is slidably connected with the third guide rail, and the third motor is fixedly connected with the third sliding block.
9. The SLM forming system with the bidirectional powder spreading function as claimed in claim 1, wherein a reciprocating mechanism is disposed between the scraper frame and the machine body, the reciprocating mechanism includes a fourth motor, a fourth lead screw and a fourth nut, the fourth motor is transversely disposed on the machine body, the fourth lead screw is connected to an output shaft of the fourth motor, the fourth nut is fixedly connected to the scraper frame, the fourth nut is in threaded connection with the fourth lead screw, the scraper frame is connected to the machine body through a fourth sliding mechanism, the fourth sliding mechanism includes a fourth guide rail and a fourth slider, the fourth guide rail is transversely disposed on the machine body, the fourth slider is slidably connected to the fourth guide rail, and the scraper frame is fixedly connected to the fourth slider.
10. The SLM forming system with the bidirectional powder spreading function as claimed in claim 4, wherein a first powder collecting cylinder is arranged on one side of the first powder feeding cylinder, and a second powder collecting cylinder is arranged on one side of the second powder feeding cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911025906.8A CN110625117A (en) | 2019-10-25 | 2019-10-25 | SLM forming system with two-way powder spreading function |
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| CN114247904A (en) * | 2021-12-24 | 2022-03-29 | 湖南华曙高科技股份有限公司 | Bidirectional powder laying and feeding device and additive manufacturing equipment |
| CN114570951A (en) * | 2022-03-21 | 2022-06-03 | 南京铖联激光科技有限公司 | 3D printer is with evenly spreading powder device |
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