CN115716136A - Powder paving defect correction device and correction method for metal 3D printer - Google Patents
Powder paving defect correction device and correction method for metal 3D printer Download PDFInfo
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- CN115716136A CN115716136A CN202110993994.1A CN202110993994A CN115716136A CN 115716136 A CN115716136 A CN 115716136A CN 202110993994 A CN202110993994 A CN 202110993994A CN 115716136 A CN115716136 A CN 115716136A
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- 239000000843 powder Substances 0.000 title claims abstract description 364
- 230000007547 defect Effects 0.000 title claims abstract description 132
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000007639 printing Methods 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- -1 thread Substances 0.000 description 1
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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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- Powder Metallurgy (AREA)
Abstract
The invention provides a powder spreading defect correcting device of a metal 3D printer, which is characterized in that a metal 3D printer body is arranged, a printing platform and a laser are arranged in the metal 3D printer body, a printing area is arranged on the printing platform, the laser is positioned right above the printing area, a powder spreading monitoring camera and a defect correcting device body are further arranged on the printing platform, the powder spreading monitoring camera is used for monitoring the powder spreading effect, if the powder spreading surface has defects, the defect correcting device body is required to perform local correction and compensation, the defect correcting device body can spray powder at any position in the set area of the printing area, and then a powder pile formed by spraying is pushed by a scraper to correct the defects of the powder spreading surface. The invention further provides a powder paving defect correction method of the metal 3D printer. Compared with the prior art, the powder spreading fault-tolerant rate of the scraper is improved, and one or more defect parts for complementing the powder spreading surface can be corrected in time.
Description
Technical Field
The invention relates to 3D printing, in particular to a powder paving defect correction device and method of a metal 3D printer.
Background
The 3D printing technology is a new fast forming technology at present, and is a technology for constructing an object by using materials such as powder, thread, paste and the like in a layer-by-layer printing manner on the basis of a digital model file.
The print platform top of metal 3D printer is provided with the scraper, the scraper is used for propelling movement powder heap to pave in printing the region, but local defect can appear after once paving, the defect mainly relates to the powder face arch or sunken, if protruding then only need strickle once again can, if sunken then need supply sunken through the new powder heap of scraper propelling movement, in fact at every turn paving work can only produce local small-size defect, current powder device that falls can't realize the part and fall the powder, if use current powder device that falls to fall to strickle off the powder again and fill the defect, can waste a large amount of powder, increase work load for the recovery work of powder.
Disclosure of Invention
In view of this, the invention provides a powder paving defect correcting device and a correcting method for a metal 3D printer, which improve the fault tolerance of scraper powder paving compared with the prior art, and can correct and supplement one or more defect parts of the powder paving surface in time.
Therefore, the invention provides a powder paving defect correcting device of a metal 3D printer, which comprises a metal 3D printer body, wherein a printing platform and a laser are arranged in the metal 3D printer body, a printing area is arranged on the printing platform, the laser is positioned right above the printing area, a powder paving monitoring camera and a defect correcting device body are further arranged on the printing platform, the powder paving monitoring camera is used for monitoring the powder paving effect, if the powder paving surface has defects, the defect correcting device body is required to perform local correction and leveling, the defect correcting device body can spray powder at any position in the set area of the printing area, and then the powder pile formed by spraying is pushed by a scraper to correct the defects of the powder paving surface.
Furthermore, the defect correcting device body comprises a powder falling bottom plate, a powder feeding movable plate and a secondary powder storage barrel, powder in the primary powder storage barrel falls into the secondary powder storage barrel, the powder feeding movable plate is slidably mounted between the powder falling bottom plate and the secondary powder storage barrel, three powder falling ports are formed in the powder falling bottom plate, a powder feeding movable plate is slidably mounted above each powder falling port, a secondary powder storage barrel is mounted above each powder feeding movable plate, a powder feeding channel is formed in each powder feeding movable plate, and the powder feeding channels move to powder outlets of the powder storage barrels or move to the powder falling ports of the powder falling bottom plate along with the powder feeding movable plates.
Further, the three powder falling ports are respectively a first powder falling port, a second powder falling port and a third powder falling port;
when the position of the defect part corresponds to the first powder falling port, the motor drives the powder feeding movable plate above the first powder falling port to enable powder to freely fall from the first powder falling port and form a first correction powder pile on the printing platform, and the scraper pushes the first correction powder pile and then levels up the defect part;
when the position of the defect part corresponds to the second powder falling port, the motor drives the powder feeding movable plate above the second powder falling port to enable the powder to freely fall from the second powder falling port and form a second correction powder pile on the printing platform, and the scraper pushes the second correction powder pile and then levels up the defect part;
when the position of the defect part corresponds to the third powder falling port, the motor drives the powder feeding movable plate above the third powder falling port to enable the powder to freely fall from the third powder falling port and form a third correction powder pile on the printing platform, and the scraper pushes the third correction powder pile and then levels up the defect part;
when the position of the defect part corresponds to the position of the joint of the first powder falling port and the second powder falling port, the motor drives the powder feeding movable plate above the first powder falling port and the second powder falling port to enable powder to freely fall from the first powder falling port and the second powder falling port and form a fourth correction powder pile on the printing platform, and the scraper pushes the fourth correction powder pile and then levels up the defect part;
when the position of the defect portion corresponds to the position of the joint of the second powder falling port and the third powder falling port, the motor drives the powder feeding movable plate above the second powder falling port and the third powder falling port to enable the powder to freely fall from the second powder falling port and the third powder falling port and form a fifth correction powder pile on the printing platform, and the scraper pushes the fifth correction powder pile and then levels the defect portion.
The invention also provides a powder paving defect correction method of the metal 3D printer, which comprises the following specific steps:
1) When a powder layer is laid in a printing area, a motor drives three powder feeding movable plates above a first powder falling port, a second powder falling port and a third powder falling port to enable powder to fall freely from the first powder falling port, the second powder falling port and the third powder falling port to form a main powder pile, and a scraper pushes the main powder pile to form a new powder layer in the printing area;
2) Observing the newly formed powder layer image through a powder laying monitoring camera, judging whether a defect part exists, and if the defect part exists, further judging the position of the defect part;
3) Selecting a powder feeding movable plate to be driven according to the position of the defect part, further forming a first correction powder pile, a second correction powder pile, a third correction powder pile, a fourth correction powder pile or a fifth correction powder pile on the printing platform, and then pushing the powder piles by moving a scraper and then leveling the defect part;
4) And after the defect part is corrected and leveled, a new powder layer is continuously paved.
The invention provides a powder paving defect correcting device of a metal 3D printer, which is characterized in that a powder paving monitoring camera and a defect correcting device body are invented, other technologies except the powder paving monitoring camera and the defect correcting device body are the prior art, and the invention aims to correct the defect of a powder paving surface in time through linkage matching of the powder paving monitoring camera and the defect correcting device body, so that the powder paving effect is improved. Specifically, the powder paving monitoring camera is used for finding a defect part (specifically a concave part) on the surface of the metal powder layer, sending a position signal of the defect part to the defect correcting device body, sprinkling powder at a corresponding position according to the position of the defect part by the defect correcting device body, forming a powder pile for correcting and compensating the defect part, pushing the corrected powder pile by a scraper, and then compensating the defect part.
Compared with the prior art, the powder spreading fault-tolerant rate of the scraper is improved, and one or more defect parts for complementing the powder spreading surface can be timely and pertinently corrected.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a powder paving defect correction device of a metal 3D printer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a defect correction device body in a powder spreading defect correction device of a metal 3D printer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a powder paving defect correction device of a metal 3D printer according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The first embodiment is as follows:
referring to fig. 1 to 3, the embodiment provides a powder paving defect correcting device of a metal 3D printer, which includes a metal 3D printer body, a printing platform 1 and a laser 2 are disposed in the metal 3D printer body, a printing area 11 is disposed on the printing platform 1, the laser 2 is located right above the printing area 11, a powder paving monitoring camera 3 and a defect correcting device body 4 are further mounted on the printing platform 1, a scraper 7 is fixedly mounted at the bottom of the defect correcting device body 4, the scraper 7 moves along the length direction of the printing area 11 along with the defect correcting device body 4, the length direction of the printing area 11 is consistent with the width direction of the defect correcting device body 4, at least two powder falling ports are equidistantly formed in the length direction of the defect correcting device body 4, powder in a primary powder storage barrel 5 enters from a feeding port of the defect correcting device body 4 and then freely falls from any powder falling port, at least one defect portion 6 exists on the surface of the printing area 11, and the position of the defect portion 6 corresponds to the position of any powder falling port or corresponds to the position of the connection of any two adjacent powder falling ports.
With reference to fig. 1 to 3, the defect correcting apparatus body 4 includes a powder falling bottom plate 41, a powder feeding movable plate 42 and a secondary powder storage barrel 43, the powder in the primary powder storage barrel 5 falls into the secondary powder storage barrel 43, the powder feeding movable plate 42 is slidably mounted between the powder falling bottom plate 41 and the secondary powder storage barrel 43, three powder falling ports are formed in the powder falling bottom plate 41, one powder feeding movable plate 42 is slidably mounted above each powder falling port, one secondary powder storage barrel 43 is mounted above each powder feeding movable plate 42, a powder feeding channel 421 is formed in the powder feeding movable plate 42, and the powder feeding channel 421 moves to the powder outlet of the secondary powder storage barrel 43 or moves to the powder falling port of the powder falling bottom plate 41 along with the powder feeding movable plate 42.
With continued reference to fig. 1 to 3, the three powder dropping ports are respectively a first powder dropping port 411, a second powder dropping port 412 and a third powder dropping port 413;
when the position of the defect portion 6 corresponds to the first powder dropping opening 411, the motor drives the powder feeding movable plate 42 above the first powder dropping opening 411 to enable powder to freely fall from the first powder dropping opening 411 and form a first correction powder pile on the printing platform 1, and the scraper 7 pushes the first correction powder pile and then levels up the defect portion 6;
when the position of the defect portion 6 corresponds to the second powder dropping port 412, the motor drives the powder feeding movable plate 42 above the second powder dropping port 412 to enable the powder to freely fall from the second powder dropping port 412 and form a second correction powder pile on the printing platform 1, and the scraper 7 pushes the second correction powder pile and then levels up the defect portion 6;
when the position of the defect portion 6 corresponds to the third powder dropping port 413, the motor drives the powder feeding movable plate 42 above the third powder dropping port 413 to enable the powder to freely fall from the third powder dropping port 413 and form a third correction powder pile on the printing platform 1, and the scraper 7 pushes the third correction powder pile and then levels up the defect portion 6;
when the position of the defect portion 6 corresponds to the position of the connection of the first powder falling port 411 and the second powder falling port 412, the motor drives the powder feeding movable plate 42 above the first powder falling port 411 and the second powder falling port 412 to enable the powder to freely fall from the first powder falling port 411 and the second powder falling port 412 and form a fourth correction powder pile on the printing platform 1, and the scraper 7 pushes the fourth correction powder pile and then levels up the defect portion 6;
when the position of the defect portion 6 corresponds to the position of the connection of the second powder falling port 412 and the third powder falling port 413, the motor drives the powder feeding movable plate 42 above the second powder falling port 412 and the third powder falling port 413, so that the powder falls freely from the second powder falling port 412 and the third powder falling port 413 and forms a fifth correction powder pile on the printing platform 1, and the scraper 7 pushes the fifth correction powder pile and then levels up the defect portion 6.
The invention provides a powder paving defect correcting device of a metal 3D printer, which is characterized in that a powder paving monitoring camera and a defect correcting device body are invented, other technologies except the powder paving monitoring camera and the defect correcting device body are the prior art, and the invention aims to correct the defect of a powder paving surface in time through linkage matching of the powder paving monitoring camera and the defect correcting device body, so that the powder paving effect is improved. Specifically, the powder paving monitoring camera is used for finding a defect part (specifically a concave part) on the surface of the metal powder layer, sending a position signal of the defect part to the defect correcting device body, sprinkling powder on the corresponding position according to the position of the defect part by the defect correcting device body, forming a powder pile for correcting and complementing the defect part, pushing the corrected powder pile through a scraper, and then leveling the defect part.
The defect correcting device body replaces the existing powder falling machine, and the existing powder falling machine has the following defects: the metal powder can only fall at a fixed position, if the powder laying surface has local defects, the existing powder falling machine can not realize local powder falling, thereby causing the waste of the powder. The defect correcting device body can realize local powder falling, greatly reduces the using amount of powder required for correcting the defects of the powder paving surface, and simultaneously reduces the recovery workload of the powder.
Therefore, compared with the prior art, the invention has the following advantages:
1) The fault tolerance rate of the powder spreading of the scraper is improved, and one or more defect parts for complementing the powder spreading surface can be corrected timely and pertinently;
2) The powder consumption required for correcting the defects of the powder paving surface is greatly reduced;
3) The recovery workload of the powder is reduced.
The second embodiment:
referring to fig. 1 to fig. 2, a powder paving defect correction device of a metal 3D printer according to a second embodiment of the present invention is shown in the drawings, and the present embodiment further adopts the following technical solutions as improvements on the basis of the above embodiments: in the first embodiment, the three powder falling ports are formed in the powder falling bottom plate 41, and actually, more powder falling ports can be formed, so that the number of the powder feeding movable plate and the secondary powder storage barrel needs to be increased while the number of the powder falling ports is increased, the increase of the number of the powder falling ports means that more choices can be provided for the powder falling position of the defect correcting device body, the position accuracy of the powder falling is improved, the powder can be more accurately sprinkled when the defect part is corrected, and the using amount of the powder required for correcting the defect of the powder paving surface is further reduced.
Example three:
referring to fig. 1 to fig. 2, a powder paving defect correcting device of a metal 3D printer according to a third embodiment of the present invention is shown in the drawings, and the present embodiment further adopts the following technical solutions as improvements on the basis of the above embodiments: in the first embodiment, the powder falling principle of a single powder falling opening adopts the sliding quantitative powder feeding of the powder feeding movable plate, and other powder feeding modes such as roller type powder feeding and the like can be actually used.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides a shop's powder defect correcting device of metal 3D printer, this internal print platform (1) and laser instrument (2) of being equipped with of metal 3D printer, be provided with on print platform (1) and print region (11), laser instrument (2) are located print region (11) directly over, a serial communication port, still install on print platform (1) and shop's powder surveillance camera machine (3) and defect correcting device body (4), the bottom fixed mounting of defect correcting device body (4) has scraper (7), just scraper (7) along with defect correcting device body (4) along the length direction of printing region (11) removes, the length direction of printing region (11) with the width direction of defect correcting device body (4) is unanimous, at least two powder mouths that fall have been seted up to the length direction equidistance of defect correcting device body (4), and the powder in the one-level stores up powder bucket (5) is followed the pan feeding mouth of defect correcting device body (4) gets into and then from arbitrary the free fall of powder mouth, there is at least one defect portion (6) in print region (11) surface the corresponding position of defect portion (6) or arbitrary powder mouth that falls.
2. The powder paving defect correcting device of the metal 3D printer, as claimed in claim 1, wherein the defect correcting device body (4) comprises a powder falling bottom plate (41), a powder feeding movable plate (42) and a secondary powder storage barrel (43), the powder in the primary powder storage barrel (5) falls into the secondary powder storage barrel (43), the powder feeding movable plate (42) is slidably mounted between the powder falling bottom plate (41) and the secondary powder storage barrel (43), three powder falling ports are formed in the powder falling bottom plate (41), one powder feeding movable plate (42) is slidably mounted above each powder falling port, one secondary powder storage barrel (43) is mounted above each powder feeding movable plate (42), a powder feeding channel (421) is formed in the powder feeding movable plate (42), and the powder feeding channel (421) moves to a powder outlet of the secondary powder storage barrel (43) or to the powder falling port of the powder falling bottom plate (41) along with the powder feeding movable plate (42).
3. The powder paving defect correcting device of the metal 3D printer according to claim 2, wherein the three powder dropping ports are a first powder dropping port (411), a second powder dropping port (412) and a third powder dropping port (413);
when the position of the defect part (6) corresponds to the first powder falling port (411), a motor drives the powder feeding movable plate (42) above the first powder falling port (411) to enable powder to freely fall from the first powder falling port (411) and form a first correction powder pile on the printing platform (1), and the scraper (7) pushes the first correction powder pile and then levels up the defect part (6);
when the position of the defect part (6) corresponds to the second powder falling port (412), the motor drives the powder feeding movable plate (42) above the second powder falling port (412) to enable powder to freely fall from the second powder falling port (412) and form a second correction powder pile on the printing platform (1), and the scraper (7) pushes the second correction powder pile and then levels up the defect part (6);
when the position of the defect part (6) corresponds to the third powder dropping opening (413), a motor drives the powder feeding movable plate (42) above the third powder dropping opening (413) to enable powder to freely fall from the third powder dropping opening (413) and form a third correction powder pile on the printing platform (1), and the scraper (7) pushes the third correction powder pile and then levels up the defect part (6);
when the position of the defect part (6) corresponds to the position of the joint of the first powder falling port (411) and the second powder falling port (412), the motor drives the powder feeding movable plate (42) above the first powder falling port (411) and the second powder falling port (412) to enable powder to freely fall from the first powder falling port (411) and the second powder falling port (412) and form a fourth correction powder pile on the printing platform (1), and the scraper (7) pushes the fourth correction powder pile and then levels the defect part (6);
when the position of the defect part (6) corresponds to the position of the joint of the second powder falling port (412) and the third powder falling port (413), the motor drives the powder feeding movable plate (42) above the second powder falling port (412) and the third powder falling port (413) to enable powder to freely fall from the second powder falling port (412) and the third powder falling port (413) and form a fifth correction powder pile on the printing platform (1), and the scraper (7) pushes the fifth correction powder pile and then levels the defect part (6).
4. A powder paving defect correction method of a metal 3D printer comprises the use of the defect correction device body as claimed in claim 3, and is characterized by comprising the following specific steps:
1) when a powder layer is laid in a printing area (11), a motor drives three powder feeding movable plates (42) above a first powder falling port (411), a second powder falling port (412) and a third powder falling port (413) to enable powder to freely fall from the first powder falling port (411), the second powder falling port (412) and the third powder falling port (413) to form a main powder pile, and a scraper (7) pushes the main powder pile and then forms a new powder layer in the printing area (11);
2) Observing the newly formed powder layer image through a powder laying monitoring camera (3), judging whether a defect part (6) exists or not, and if the defect part (6) exists, further judging the position of the defect part (6);
3) Selecting a powder feeding movable plate (42) which needs to be driven according to the position of the defect part (6) so as to form a first correction powder pile, a second correction powder pile, a third correction powder pile, a fourth correction powder pile or a fifth correction powder pile which needs to be driven on the printing platform (1), pushing the powder piles through a movable scraper (7) and then leveling the defect part (6);
4) And continuously laying a new powder layer after the defect part (6) is corrected and leveled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110993994.1A CN115716136B (en) | 2021-08-27 | 2021-08-27 | Powder spreading defect correction device and method for metal 3D printer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110993994.1A CN115716136B (en) | 2021-08-27 | 2021-08-27 | Powder spreading defect correction device and method for metal 3D printer |
Publications (2)
| Publication Number | Publication Date |
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| CN115716136A true CN115716136A (en) | 2023-02-28 |
| CN115716136B CN115716136B (en) | 2024-07-19 |
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| CN202110993994.1A Active CN115716136B (en) | 2021-08-27 | 2021-08-27 | Powder spreading defect correction device and method for metal 3D printer |
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| CN117753996A (en) * | 2023-12-21 | 2024-03-26 | 山东创瑞激光科技有限公司 | SLM prints shaping control system |
| CN117753996B (en) * | 2023-12-21 | 2024-09-03 | 山东创瑞激光科技有限公司 | SLM prints shaping control system |
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| Publication number | Publication date |
|---|---|
| CN115716136B (en) | 2024-07-19 |
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