CN113500211B - Atmosphere control device of selective laser melting forming equipment - Google Patents
Atmosphere control device of selective laser melting forming equipment Download PDFInfo
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- CN113500211B CN113500211B CN202110577216.4A CN202110577216A CN113500211B CN 113500211 B CN113500211 B CN 113500211B CN 202110577216 A CN202110577216 A CN 202110577216A CN 113500211 B CN113500211 B CN 113500211B
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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
- B22F12/70—Gas flow means
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
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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
- B22F10/77—Recycling of gas
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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
- 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
- B22F12/90—Means for process control, e.g. cameras or sensors
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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
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- 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)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Analytical Chemistry (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention belongs to the technical field of laser additive manufacturing equipment, and particularly relates to an atmosphere control device of selective laser melting forming equipment, which comprises a forming cabin, an air inlet pipe group, an air suction pipe group, a forming workbench and a gas purifying and dedusting device; the gas purification and dust removal device is positioned outside the forming cabin, one end of the gas inlet pipe group penetrates through and is positioned inside the forming cabin, and the connection parts of the gas inlet pipe group are sealed; the other end of the gas inlet pipe group is communicated with the gas purification and dust removal device; the air suction pipe group comprises an air suction pipeline and a fixed air suction pipe; the air suction pipeline and the fixed air suction pipe are both positioned below the air inlet pipe group; the fixed air suction pipes are fixedly arranged on the periphery of the forming workbench and are positioned in the forming cabin; by adopting the mode that the air suction pipeline and the air inlet pipeline are arranged in a layered manner in space, the atmosphere impurities in the forming process can be effectively removed, and the mutual interference in the atmosphere circulating process in the forming process is avoided.
Description
Technical Field
The invention belongs to the technical field of laser additive manufacturing equipment, and particularly relates to an atmosphere control device of selective laser melting forming equipment.
Background
With the continuous development of the technology, the step of the selective laser melting equipment advancing towards large-scale and precise direction is faster and faster. The large-scale selective laser melting equipment can process parts with large size specification, but the breadth of a substrate is large, and meanwhile, in order to improve the processing efficiency and reduce the processing time, multiple laser printers are generally adopted for simultaneous forming; and the selective laser melting equipment needs atmosphere protection when additive manufacturing is carried out.
The currently adopted method is mainly as follows: and an air suction pipe group and an air inlet pipe group are respectively arranged on two sides of the forming substrate, filtered inert gas is introduced into one side of the forming substrate through the air inlet pipe group, and gas containing impurities is sucked out of the other side of the forming substrate through the air suction pipe group and sent to a purification and dust removal system for filtration and dust removal and then sent to the air inlet pipe group, so that a closed-loop atmosphere circulating system is formed. However, the coverage range of the method is only on two sides of the forming substrate, the coverage range is small, atmosphere impurities in the processing area of the laser printer in the forming process cannot be effectively removed, and mutual interference in the atmosphere circulation process cannot be avoided, so that the forming quality of the product is influenced.
Disclosure of Invention
Aiming at the problems, the invention provides an atmosphere control device of selective laser melting forming equipment, which comprises a forming cabin, an air inlet pipe group, an air suction pipe group, a forming workbench and a gas purification and dust removal device, wherein the forming cabin is provided with a plurality of air inlet pipes;
the gas purification and dust removal device is positioned outside the forming cabin, one end of the gas inlet pipe group penetrates through and is positioned inside the forming cabin, and the connection parts of the gas inlet pipe group are sealed;
the other end of the gas inlet pipe group is communicated with the gas purification and dust removal device;
forming workbench supports are fixedly arranged at two ends of the forming workbench, the lower end of the forming cabin is fixedly arranged above the forming workbench and the forming workbench supports, and a closed space is formed by the forming workbench, the forming workbench and the forming workbench supports;
the air suction pipe group comprises an air suction pipeline and a fixed air suction pipe; the air suction pipeline and the fixed air suction pipe are both positioned below the air inlet pipe group;
the fixed air suction pipes are fixedly arranged on the periphery of the forming workbench and are positioned in the forming cabin;
one end of the air suction pipeline, which is positioned in the forming cabin, is respectively positioned on two opposite side walls in the forming cabin and is positioned on the outer side of the fixed air suction pipe; and one end of the air suction pipeline, which is positioned outside the forming cabin, is communicated with the gas purification and dust removal device.
Further, a powder spreading scraper base is also arranged on the forming workbench;
the air suction pipe group also comprises a movable air suction pipe; the movable air suction pipe is fixedly arranged on the powder spreading scraper base.
Furthermore, the movable air suction pipes are respectively communicated with the fixed air suction pipes arranged at the left and right limit positions of the movement of the powder spreading scraper base.
Further, the suction pipe group also comprises a pipeline moving connecting device; the pipeline moving connecting device comprises an upper flange and a lower flange;
the upper flange is arranged at the tail end of one end, located in the forming cabin, of the air suction pipeline, the lower flange is fixedly installed on a forming workbench support, the upper flange is communicated with the lower flange, and the fixed air suction pipe is communicated with the gas purification and dust removal device through the air suction pipeline.
Further, the air inlet pipe group comprises an air inlet pipeline group;
one end of the air inlet pipeline group is located between the fixed air suction pipe and the inner wall of the top of the forming cabin, and the air inlet pipeline group is arranged in an annular or tubular multi-point mode and located outside a processing area of the laser printer.
Furthermore, the tail end of one end, located in the forming cabin, of the air inlet pipeline group is also provided with a plurality of groups of air inlet nozzles.
The invention has the beneficial effects that:
1. by adopting the mode that the air suction pipeline and the air inlet pipeline are arranged in a layered manner in space, the atmosphere impurities in the forming process can be effectively removed, the mutual interference in the atmosphere circulation process in the forming process is avoided, and the forming quality of the product is improved.
2. Through will inhale the pipeline, fixed breathing pipe, one end breathing pipe and intake pipe group reasonable distribution in the shaping cabin, optimized the space size in the shaping cabin for the time that needs the gas washing shortens, has saved processing auxiliary time.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic view from a first perspective of an atmosphere control device according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of a second viewing angle of an atmosphere control device according to an embodiment of the present invention;
FIG. 3 shows a schematic diagram of a third viewing angle of an atmosphere control device according to an embodiment of the present invention;
FIG. 4 shows a schematic diagram of a fourth perspective of an atmosphere control device according to an embodiment of the present invention;
FIG. 5 shows a front view of an atmosphere control device according to an embodiment of the present invention;
FIG. 6 shows a left side view of an atmosphere control device according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of an atmosphere control apparatus at B-B according to an embodiment of the present invention;
FIG. 8 shows a partially enlarged schematic view of an atmosphere control device at C according to an embodiment of the present invention.
In the figure: 1. a shaping compartment; 2. a laser printer; 3. an air intake pipe group; 4. a suction pipe group; 5. a forming table; 6. a gas purification and dust removal device; 7. a pipeline moving connecting device; 8. a movable air suction pipe; 9. an air intake manifold group; 10. an air inlet nozzle; 11. an air intake pipeline; 12. fixing an air suction pipe; 13. spreading a powder scraper base; 14. an upper flange; 15. forming a workbench support; 16. and a lower flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The embodiment of the invention also provides an atmosphere control device of the selective laser melting forming equipment, which comprises a forming cabin 1, an air inlet pipe group 3, an air suction pipe group 4, a forming workbench 5 and a gas purification and dust removal device 6, and is exemplarily shown in fig. 1 to 8.
The gas purification and dust removal device 6 is positioned outside the forming cabin 1, one end of the gas inlet pipe group 3 and one end of the gas suction pipe group 4 penetrate through the inside of the forming cabin 1, and the joints of the gas inlet pipe group and the gas suction pipe group are sealed.
The other end of the air inlet pipe group 3 and the other end of the air suction pipe group 4 are respectively communicated with the gas purification and dust removal device 6, and the gas purification and dust removal device 6 filters and removes dust from the gas in the forming cabin 1 absorbed by the air suction pipe group 4 and then conveys the gas into the forming cabin 1 through the air inlet pipe group 3.
Illustratively, an air inlet pipe group 3 and an air suction pipe group 4 are arranged in a forming chamber 1 of the selective laser melting forming device, wherein the air suction pipe group 4 is positioned below the air inlet pipe group 3, the air suction pipe group 4 is arranged in an annular structure, and the air inlet pipe group 3 is arranged in an annular or tubular multipoint distribution structure; when the selective laser melting forming equipment works, atmosphere impurities are generated in the forming cabin 1, are absorbed by the air suction pipe group 4 and are discharged into the gas purification and dust removal device 6; the gas purification and dust removal device 6 discharges the filtered protective gas into the forming cabin 1 through the gas inlet pipe group 3;
thereby protecting the selective laser melting and forming process and enabling the atmosphere to form space circulation in the product forming process; by adopting the mode that the air inlet pipe group 3 and the air inlet pipe group 4 are arranged in a layered manner in space, the atmosphere impurities in the forming process can be effectively removed, the mutual interference in the atmosphere circulating process in the forming process is avoided, and the forming quality of the product is improved. Meanwhile, in the forming process, the processing sequence of the laser printers is determined according to the relative spatial positions of the laser printers 2 arranged at the top of the forming cabin 1; thereby ensuring the qualification and stability of the atmosphere at the processing area to the maximum extent.
Forming workbench supports 15 are fixedly arranged at two ends of the forming workbench 5, the lower end of the forming cabin 1 is fixedly arranged above the forming workbench 5 and the forming workbench supports 15, and a closed space is formed by the forming workbench 5 and the forming workbench supports 15;
the forming table support 15 is used to support the forming chamber 1.
The top of the forming cabin 1 is provided with a plurality of groups of laser printers 2, and the laser printers 2 are used for additive manufacturing.
The air suction pipe group 4 comprises an air suction pipeline 11, a fixed air suction pipe 12, a movable air suction pipe 8 and a pipeline movable connecting device 7;
still be provided with shop's powder scraper base 13 on the shaping workstation 5, shop's powder scraper base 13 is used for laying metal powder.
The movable air suction pipe 8 is fixedly installed on the powder spreading scraper base 13, when the powder spreading scraper base 13 spreads powder, the movable air suction pipe 8 moves on the forming workbench 5 along with the powder spreading scraper base 13, and atmosphere impurities in the moving range of the powder spreading scraper base 13 and the processing area of the laser printer are absorbed, so that the absorption range of the atmosphere impurities is enlarged, and the product forming quality is improved.
The fixed air suction pipes 12 are fixedly arranged around the forming workbench 5 and are positioned in the forming cabin 1; the movable air suction pipes 8 are respectively communicated with fixed air suction pipes 12 arranged at the left limit position and the right limit position moving along with the powder spreading scraper base 13;
one end of the air suction pipeline 11, which is positioned in the forming cabin 1, is respectively positioned at two opposite side walls in the forming cabin 1 and is positioned outside the fixed air suction pipe 12; one end of the air suction pipeline 11, which is positioned outside the forming cabin 1, is communicated with the gas purification and dust removal device 6.
The pipeline moving connecting device 7 comprises an upper flange 14 and a lower flange 16;
the upper flange 14 is arranged at the end of the air suction pipeline 11 located in the forming cabin 1, the lower flange 16 is fixedly installed on a forming workbench support 15, when the forming workbench 5 is located at a forming working position (below the forming cabin 1), the upper flange 14 is communicated with the lower flange 16, and the fixed air suction pipeline 12 is communicated with the gas purification and dust removal device 6 through the air suction pipeline 11.
The intake pipe group 3 includes an intake pipe group 9;
one end of the air inlet pipeline group 9 is positioned between the fixed air suction pipe 12 and the inner wall of the top of the forming cabin 1, and the air inlet pipeline group 9 is arranged in an annular or tubular multi-point mode and is positioned outside a processing area of the laser printer 2.
The end, located in the forming cabin 1, of the air inlet pipeline group 9 is also provided with a plurality of groups of air inlet nozzles 10, and the air inlet nozzles 10 are used for increasing the jet strength of the protective gas, so that the atmosphere impurities in the forming cabin 1 are blown into the air suction range of the lower fixed air suction pipe 12 and the lower movable air suction pipe 8, the protective gas is rapidly filled in the forming cabin 1, and the forming quality of the product is improved.
The gas purification and dust removal device 6 is arranged outside the forming cabin 1, the gas purification and dust removal device 6 absorbs and filters the atmosphere impurities in the forming cabin 1 through the air suction pipeline 11, and conveys the filtered and dust-removed protective gas into the forming cabin 1 through the air inlet pipeline group 9, so that the atmosphere impurities in the forming cabin 1 are reduced, the atmosphere quality is improved, and the forming quality of the product is improved.
Illustratively, in the workpiece forming process, protective gas (inert gas or nitrogen) filtered and dedusted by the gas purification and dedusting device 6 is introduced into the forming chamber 1 through the gas inlet pipeline group 9 and the gas inlet nozzle 10 to protect the melting and forming process, gas containing impurities generated in the workpiece forming process is sucked out through the movable gas suction pipe 8 and the fixed gas suction pipe 12 through the gas suction pipeline 11 and enters the gas purification and dedusting device 6 to be filtered and dedusted, the protective gas forms spatial circulation in the workpiece forming process, and simultaneously, in the forming process, the processing sequence is determined according to the relative spatial positions of the plurality of laser printers 2 installed at the top of the forming chamber 1, so that the qualification and the stability of the atmosphere at the processing area are ensured to the maximum extent.
By adopting the mode that the air suction pipeline 11 and the air inlet pipeline group 9 are arranged in a layered manner in space, the atmosphere impurities in the forming process can be effectively removed, the mutual interference in the atmosphere circulating process in the forming process is avoided, and the forming quality of the product is improved.
Meanwhile, the air suction pipeline 11, the fixed air suction pipe 12, the movable air suction pipe 8 and the air inlet pipeline group 9 are reasonably distributed in the forming cabin 1, so that the space size in the forming cabin 1 is optimized, the time for gas washing is shortened, and the processing auxiliary time is saved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. An atmosphere control device of selective laser melting forming equipment is characterized in that: comprises a forming cabin (1), an air inlet pipe group (3), an air suction pipe group (4), a forming workbench (5) and a gas purification and dust removal device (6);
the gas purification and dust removal device (6) is positioned outside the forming cabin (1), one end of the gas inlet pipe group (3) penetrates through and is positioned inside the forming cabin (1), and the connection parts of the gas inlet pipe group and the gas inlet pipe group are hermetically arranged;
the other end of the air inlet pipe group (3) is communicated with the gas purification and dust removal device (6);
forming workbench supports (15) are fixedly arranged at two ends of the forming workbench (5), the lower end of the forming cabin (1) is fixedly arranged above the forming workbench (5) and the forming workbench supports (15), and a closed space is formed by the forming workbench (5) and the forming workbench supports (15);
the air suction pipe group (4) comprises an air suction pipeline (11) and a fixed air suction pipe (12); the air suction pipeline (11) and the fixed air suction pipe (12) are both positioned below the air inlet pipe group (3);
the fixed air suction pipes (12) are fixedly arranged on the periphery of the forming workbench (5) and are positioned in the forming cabin (1);
one end of the air suction pipeline (11) positioned in the forming cabin (1) is respectively positioned at two opposite side walls in the forming cabin (1) and positioned at the outer side of the fixed air suction pipe (12); one end of the air suction pipeline (11) positioned outside the forming cabin (1) is communicated with the gas purification and dust removal device (6);
a powder spreading scraper base (13) is also arranged on the forming workbench (5);
the air suction pipe group (4) also comprises a movable air suction pipe (8); the movable air suction pipe (8) is fixedly arranged on the powder spreading scraper base (13);
the movable air suction pipe (8) is respectively communicated with a fixed air suction pipe (12) arranged at the left limit position and the right limit position of the movement of the powder spreading scraper base (13);
the suction pipe group (4) also comprises a pipeline moving connecting device (7); the pipeline moving connecting device (7) comprises an upper flange (14) and a lower flange (16);
the upper flange (14) is arranged at the tail end of one end, located in the forming cabin (1), of the air suction pipeline (11), the lower flange (16) is fixedly installed on a forming workbench support (15), the upper flange (14) is communicated with the lower flange (16), and the fixed air suction pipe (12) is communicated with the gas purification and dust removal device (6) through the air suction pipeline (11).
2. The atmosphere control device of a selective laser melting forming apparatus according to claim 1, wherein: the air inlet pipe group (3) comprises an air inlet pipeline group (9);
one end of the air inlet pipeline group (9) is located between the fixed air suction pipe (12) and the inner wall of the top of the forming cabin (1), and the air inlet pipeline group (9) is arranged in an annular or tubular multi-point mode and located outside a processing area of the laser printer.
3. An atmosphere control apparatus for a selective laser melting and forming device according to claim 2, wherein: the tail end of one end, positioned in the forming cabin (1), of the air inlet pipeline group (9) is also provided with a plurality of groups of air inlet nozzles (10).
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| CN202110577216.4A CN113500211B (en) | 2021-05-26 | 2021-05-26 | Atmosphere control device of selective laser melting forming equipment |
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| CN202110577216.4A CN113500211B (en) | 2021-05-26 | 2021-05-26 | Atmosphere control device of selective laser melting forming equipment |
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| CN113500211B true CN113500211B (en) | 2023-01-13 |
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