CN109351972B - Controllable component continuous powder feeding system - Google Patents
Controllable component continuous powder feeding system Download PDFInfo
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- CN109351972B CN109351972B CN201811502676.5A CN201811502676A CN109351972B CN 109351972 B CN109351972 B CN 109351972B CN 201811502676 A CN201811502676 A CN 201811502676A CN 109351972 B CN109351972 B CN 109351972B
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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
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
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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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- 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
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
- B22F10/322—Process control of the atmosphere, e.g. composition or pressure in a building chamber of the gas flow, e.g. rate or direction
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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
- B22F10/36—Process control of energy beam parameters
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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
- B22F12/53—Nozzles
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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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Abstract
The invention relates to a controllable component continuous powder feeding system which comprises a recovery system (1), a powder feeding head (2), a controllable component continuous powder feeding switch (3), a multi-path powder feeder (4), a control system (5), an atmosphere protection box (6) and a powder feeding pipe (7). The powder feeding head (2) is connected with the multi-path powder feeder (4) through the controllable component continuous powder feeding switch (3), so that the rapid and continuous switching of various kinds of powder can be realized, the controllable component continuous powder feeding switch (3) is connected with the recovery system (1) and is used for recovering unused powder, and the work of the controllable component continuous powder feeding switch (3) and the multi-path powder feeder (4) is controlled through the control system (5).
Description
Technical Field
The invention relates to a laser additive manufacturing powder feeding system, in particular to a controllable component continuous powder feeding system, and belongs to the technical field of laser additive manufacturing.
Background
Laser additive manufacturing is a rapid and flexible manufacturing technology, adopts the concepts of discrete accumulation and material growth, gets rid of the constraint of the traditional process, is a major leap in the technical field of manufacturing, and is applied to the preparation and part repair of metal, ceramic, plastic and various composite materials at present.
The synchronous powder feeding laser additive manufacturing technology organically combines a rapid forming technology and a laser cladding technology, takes metal powder as a processing raw material, and adopts high-energy-density laser beams to clad and stack the powder sprayed on a metal substrate layer by layer. The synchronous powder feeding laser additive manufacturing technology can obviously improve the deposition efficiency and the cladding quality, can reduce the dilution rate and the heat affected zone of the base material, is easy to control the height of the cladding layer, can prepare parts with large size and excellent performance, and is the mainstream material forming mode in the current laser forming application.
With the increasing demand for material properties, not all parts are made of a single material. In the forming process of the dissimilar alloy gradient structure, the interfaces of all the gradient structures are not planes vertical to the forming height direction, and the optimal design of the gradient structure of the part needs to be carried out aiming at a specific temperature gradient environment; the traditional laser additive manufacturing process usually needs to be carried out in an atmosphere protection box, particularly when large-size parts are formed, the size of the protection box is large, and a powder feeder needs to be arranged outside the protection box due to operations such as powder adding and the like, so that a powder feeding pipeline is long. In addition, the response time is long from the start of the powder feeder to the transmission of the metal powder along with the carrier gas in the powder feeding pipeline and then to the stable powder discharge of the powder feeding nozzle.
In the layer-by-layer accumulation process of laser additive manufacturing of a single material, a preset powder feeding parameter method is adopted in the powder feeding process, namely after the powder feeding speed and the carrier gas flow are adjusted, laser additive manufacturing is started after powder is stably discharged from a powder feeding nozzle, but the powder acceleration time in the method is long, and the rapid free switching of metal powder in the gradient structure laser additive manufacturing process cannot be realized, so that a controllable component continuous powder feeding system suitable for a flexible interface needs to be developed.
Disclosure of Invention
The invention aims to develop a controllable component continuous powder feeding system suitable for a flexible interface, realize continuous free switching of dissimilar alloy powder in a laser additive manufacturing process, and provide an equipment foundation for laser additive manufacturing of a complex interface dissimilar alloy gradient structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a controllable composition send whitewashed system in succession, including recovery system 1, send whitewashed head 2, controllable composition send whitewashed switch 3 in succession, multichannel powder feeder 4, control system 5, atmosphere protection case 6, send powder pipe 7, send whitewashed head 2 and multichannel powder feeder 4 between be connected through controllable composition send whitewashed switch 3 in succession, can realize the quick continuous switching of multiple powder, controllable composition send whitewashed switch 3 in succession to be connected with recovery system 1 for retrieve the powder that is not utilized, controllable composition send whitewashed switch 3 in succession, the work of multichannel powder feeder 4 is controlled through control system 5.
Preferably, a controllable component continuous powder feeding system is characterized in that the controllable component continuous powder feeding switch 3 is composed of two pneumatic switches A8 and B9.
Preferably, the controlled composition continuous powder feed switch 3 is placed inside the atmosphere protection box 6, close to the powder feed nozzle, greatly reducing the acceleration time of the powder.
Preferably, the opening and closing of the pneumatic switch A6 and the pneumatic switch B7 are controlled by the control system 5, and the reaction time is less than 0.03 s.
Preferably, the recovery system 1 is internally divided into a plurality of chambers, and is connected with the controllable component continuous powder feeding switch 3 through the powder feeding pipe 7, so that the isolated recovery of different powders is realized.
Preferably, the multi-path powder feeder 4 can perform at least two-path powder feeding and is connected with the controllable component continuous powder feeding switch 3 through a powder feeding pipe, and the powder feeding start and end are controlled by the control system 5.
Preferably, the control system 5 comprises a computer and control software, and the operation of the continuous powder feeding system of controllable ingredients is carried out entirely on the visual interface of the computer.
Preferably, the control system 5 may be combined with an additive manufacturing system to achieve a controlled ingredient continuous powder feed of the additive manufacturing process.
The invention has the advantages that:
the problem of powder accumulation caused by time delay in the powder acceleration process and the powder feeder switching process is solved, free switching of dissimilar alloy powder in the laser additive manufacturing process is finally achieved, and an equipment basis is provided for laser additive manufacturing of a complex interface dissimilar alloy gradient structure.
The invention is further illustrated by the following figures and detailed description of the invention, which are not meant to limit the scope of the invention.
Drawings
FIG. 1 is a schematic view of a controlled ingredient continuous powder feeding system of the present invention.
FIG. 2 is a schematic view of the switch for continuously feeding powder with controlled ingredients of the present invention.
The reference numbers in the figures are:
1 recovery system, 2 powder feeding head, 3 controllable component continuous powder feeding switch, 4 multi-path powder feeder, 5 control system, 6 atmosphere protection box, 7 powder feeding pipe, 8 pneumatic switch A, 9 pneumatic switch B
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used in the explanation of the invention, and should not be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In one broad embodiment of the invention, the controllable component continuous powder feeding system comprises a recovery system 1, a powder feeding head 2, a controllable component continuous powder feeding switch 3, a multi-path powder feeder 4, a control system 5, an atmosphere protection box 6 and a powder feeding pipe 7. The powder feeding head 2 is connected with the multi-path powder feeder 4 through the controllable component continuous powder feeding switch 3, rapid and continuous switching of various powders can be achieved, the controllable component continuous powder feeding switch 3 is connected with the recovery system 1 and used for recovering the powder which is not utilized, and the work of the controllable component continuous powder feeding switch 3 and the multi-path powder feeder 4 is controlled through the control system 5.
The controllable component continuous powder feeding switch 3 is composed of two pneumatic switches A8 and B9. When the additive manufacturing process is ready to be carried out, the pneumatic switch A8 and the pneumatic switch B9 are both set to be OFF, namely, two paths of powder are respectively recovered through the recovery system 1, when the deposition of the TA15 alloy is carried out, the pneumatic switch A8 is set to be ON, the pneumatic switch B9 is set to be OFF, and the TA15 alloy powder is sent out through the powder sending nozzle; when the deposition of the Ti2 AlNb-based alloy was performed, the pneumatic switch A8 was turned OFF, the pneumatic switch B9 was turned ON, and the Ti2 AlNb-based alloy powder was sent out through the powder feeding nozzle.
The controllable component continuous powder feeding switch 3 is arranged in the atmosphere protection box and is close to the powder feeding spray head.
The opening and closing of the pneumatic switch A8 and the pneumatic switch B9 are controlled by the control system 5, and the reaction time is less than 0.03 s.
The recovery system 1 is internally divided into a plurality of chambers, and is connected with a controllable component continuous powder feeding switch 3 through a powder feeding pipe, so that different powders are separately recovered.
The multi-path powder feeder 4 can feed powder in at least two paths, is connected with the controllable component continuous powder feeding switch 3 through a powder feeding pipe 7, and is controlled by a control system 5 when powder feeding starts and ends.
The control system 5 comprises a computer and control software, and the operation of the controllable component continuous powder feeding system is completely carried out on a visual interface of the computer.
The control system 5 can be combined with an additive manufacturing system to realize the continuous powder feeding of controllable components in the additive manufacturing process.
When the flow rate of the carrier gas for feeding the powder is 5L/min and the powder is conveyed by a pipeline with the inner diameter of 4mm, the speed of the powder is about 6.6 m/s. The laser additive manufacturing process is generally carried out in an atmosphere protection box, when the laser additive manufacturing is carried out in equipment with the height of 1 m multiplied by 2m, the length of a powder feeding pipe is 2m, the powder acceleration time exceeds 0.3s, and the reaction time of a pneumatic switch is 0.03 s. When the scanning speed is 10mm/s, the system moves by 3mm in the acceleration process of the powder of the traditional powder feeding system, and the system only moves by 0.3mm after the controllable component continuous powder feeding system is used, so that the accuracy of controlling the powder feeding of the dissimilar materials is greatly improved.
In another embodiment of the invention, the controllable component continuous powder feeding system comprises a recovery system 1, a powder feeding head 2, a controllable component continuous powder feeding switch 3, a multi-path powder feeder 4, a control system 5, an atmosphere protection box 6 and a powder feeding pipe 7. The powder feeding head 2 is connected with the multi-path powder feeder 4 through the controllable component continuous powder feeding switch 3, rapid and continuous switching of various powders can be achieved, the controllable component continuous powder feeding switch 3 is connected with the recovery system 1 and used for recovering the powder which is not utilized, and the work of the controllable component continuous powder feeding switch 3 and the multi-path powder feeder 4 is controlled through the control system 5.
The controllable component continuous powder feeding switch 3 is composed of two pneumatic switches A8 and B9. When the additive manufacturing process is ready to be carried out, the pneumatic switch A8 and the pneumatic switch B9 are both set to be OFF, namely, two paths of powder are respectively recovered through the recovery system 1, when the deposition of TC11 alloy is carried out, the pneumatic switch A8 is set to be ON, the pneumatic switch B9 is set to be OFF, and the TC11 alloy powder is sent out through the powder sending nozzle; when the deposition of the Ti2 AlNb-based alloy was performed, the pneumatic switch A8 was turned OFF, the pneumatic switch B9 was turned ON, and the Ti2 AlNb-based alloy powder was sent out through the powder feeding nozzle.
The controllable component continuous powder feeding switch 3 is arranged in the atmosphere protection box and is close to the powder feeding spray head, so that the acceleration time of powder is greatly shortened.
The opening and closing of the pneumatic switch A8 and the pneumatic switch B9 are controlled by the control system 5, and the reaction time is less than 0.03 s.
The recovery system 1 is internally divided into a plurality of chambers, and is connected with a controllable component continuous powder feeding switch 3 through a powder feeding pipe, so that different powders are separately recovered.
The multi-path powder feeder 4 can feed powder in at least two paths, is connected with the controllable component continuous powder feeding switch 3 through a powder feeding pipe 7, and is controlled by a control system 5 when powder feeding starts and ends.
The control system 5 comprises a computer and control software, and the operation of the controllable component continuous powder feeding system is completely carried out on a visual interface of the computer.
The control system 5 can be combined with an additive manufacturing system to realize the continuous powder feeding of controllable components in the additive manufacturing process.
When the flow rate of the carrier gas for feeding the powder is 5L/min and the powder is conveyed by a pipeline with the inner diameter of 4mm, the speed of the powder is about 6.6 m/s. The laser additive manufacturing process is generally carried out in an atmosphere protection box, when the laser additive manufacturing is carried out in equipment with the height of 2m × 4m, the length of a powder feeding pipe is 8 m, the powder acceleration time reaches 1.2s, and the reaction time of a pneumatic switch is 0.03 s. When the scanning speed is 20mm/s, the system moves by 24mm in the acceleration process of the powder of the traditional powder feeding system, and after the controllable component continuous powder feeding system is used, the system moves by 0.6mm, so that the accuracy of controlling the powder feeding of the dissimilar materials is greatly improved.
In a further embodiment of the invention, the controllable component continuous powder feeding system comprises a recovery system 1, a powder feeding head 2, a controllable component continuous powder feeding switch 3, a multi-path powder feeder 4, a control system 5, an atmosphere protection box 6 and a powder feeding pipe 7. The powder feeding head 2 is connected with the multi-path powder feeder 4 through the controllable component continuous powder feeding switch 3, rapid and continuous switching of various powders can be achieved, the controllable component continuous powder feeding switch 3 is connected with the recovery system 1 and used for recovering the powder which is not utilized, and the work of the controllable component continuous powder feeding switch 3 and the multi-path powder feeder 4 is controlled through the control system 5.
The controllable component continuous powder feeding switch 3 is composed of two pneumatic switches A8 and B9. When the additive manufacturing process is ready to be carried out, the pneumatic switch A8 and the pneumatic switch B9 are both set to be OFF, namely, two paths of powder are respectively recovered through the recovery system 1, when the deposition of the TA15 alloy is carried out, the pneumatic switch A8 is set to be ON, the pneumatic switch B9 is set to be OFF, and the TA15 alloy powder is sent out through the powder sending nozzle; when deposition of TC4 was performed, pneumatic switch a8 was turned OFF, pneumatic switch B9 was turned ON, and TC4 alloy powder was discharged through the powder feeding nozzle.
The controllable component continuous powder feeding switch 3 is arranged in the atmosphere protection box and is close to the powder feeding spray head, so that the acceleration time of powder is greatly shortened.
The opening and closing of the pneumatic switch A8 and the pneumatic switch B9 are controlled by the control system 5, and the reaction time is less than 0.03 s.
The recovery system 1 is internally divided into a plurality of chambers, and is connected with the controllable component continuous powder feeding switch 3 through the powder feeding pipe 7, so that different powders are separately recovered.
The multi-path powder feeder 4 can feed powder in at least two paths and is connected with the controllable component continuous powder feeding switch 3 through a powder feeding pipe, and the powder feeding start and end are controlled by a control system 5.
The control system 5 comprises a computer and control software, and the operation of the controllable component continuous powder feeding system is completely carried out on a visual interface of the computer.
The control system 5 can be combined with an additive manufacturing system to realize the continuous powder feeding of controllable components in the additive manufacturing process.
When the flow rate of the carrier gas for feeding the powder was 10L/min and the powder was transported by a pipe having an inner diameter of 4mm, the speed of the powder was about 13.2 m/s. The laser additive manufacturing process is generally carried out in an atmosphere protection box, when the laser additive manufacturing is carried out in equipment with the height of 2m × 4m, the length of a powder feeding pipe is 8 m, the powder acceleration time reaches 0.6s, and the reaction time of a pneumatic switch is 0.03 s. When the scanning speed is 20mm/s, the system moves by 12mm in the acceleration process of the powder of the traditional powder feeding system, and after the controllable component continuous powder feeding system is used, the system moves by 0.6mm, so that the accuracy of controlling the powder feeding of the dissimilar materials is greatly improved.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. 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 (5)
1. A controllable component continuous powder feeding system comprises a recovery system (1), a powder feeding head (2), a controllable component continuous powder feeding switch (3), a multi-path powder feeder (4), a control system (5), an atmosphere protection box (6) and a powder feeding pipe (7), wherein the powder feeding head (2) is connected with the multi-path powder feeder (4) through the controllable component continuous powder feeding switch (3) to realize the rapid and continuous switching of multiple kinds of powder, the controllable component continuous powder feeding switch (3) is connected with the recovery system (1) and is used for recovering unused powder, and the work of the controllable component continuous powder feeding switch (3) and the multi-path powder feeder (4) is controlled through the control system (5);
the controllable component continuous powder feeding switch (3) is composed of a pneumatic switch A (8) and a pneumatic switch B (9);
the recovery system (1) is internally divided into a plurality of chambers, and is connected with a controllable component continuous powder feeding switch (3) through a powder feeding pipe to realize the isolation recovery of different powders;
when the additive manufacturing process is ready to be carried out, the pneumatic switch A (8) and the pneumatic switch B (9) are both set to be OFF, namely, two paths of powder are respectively recovered through the recovery system (1), when the deposition of TA15 or TC11 alloy is carried out, the pneumatic switch A (8) is set to be ON, the pneumatic switch B (9) is set to be OFF, and the TA15 or TC11 alloy powder is sent out through the powder sending nozzle; when the deposition of the Ti2 AlNb-based alloy is performed, the pneumatic switch a (8) is turned OFF, the pneumatic switch B (9) is turned ON, and the Ti2 AlNb-based alloy powder is sent out through the powder sending nozzle.
2. A continuous powder delivery system of controlled composition as claimed in claim 1, characterised in that the continuous powder delivery switch (3) of controlled composition is placed inside the atmosphere protecting box (6) and close to the powder delivery nozzle.
3. A continuous powder delivery system with controlled composition as claimed in claim 2, characterised in that the opening and closing of the pneumatic switch a (8) and the pneumatic switch B (9) is controlled by the control system (5) with a response time of less than 0.03 s.
4. A controlled composition continuous powder delivery system according to claim 1, wherein the control system (5) comprises a computer and control software, and the operation of the controlled composition continuous powder delivery system is performed entirely on a visual interface of the computer.
5. A controlled composition continuous powder delivery system according to claim 1, characterised in that the control system (5) is adapted to be integrated with an additive manufacturing system to effect controlled composition continuous powder delivery in an additive manufacturing process.
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| CN110449581B (en) * | 2019-08-23 | 2021-08-03 | 中国航发北京航空材料研究院 | TiAl + Ti2Method for preparing AlNb composite material by laser melting deposition |
| CN111469411A (en) * | 2020-04-07 | 2020-07-31 | 成都青石激光科技有限公司 | Powder feeding control and recovery device |
| CN112935279B (en) * | 2021-02-01 | 2022-07-15 | 上海彩石激光科技有限公司 | Powder feeding device and method |
| CN116393716B (en) * | 2023-06-06 | 2023-08-11 | 太原科技大学 | Multifunctional powder feeder for laser cladding additive manufacturing and application method thereof |
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| IL287642B (en) * | 2015-10-30 | 2022-07-01 | Seurat Tech Inc | Additive manufacturing system and apparatus |
| US11213888B2 (en) * | 2016-05-03 | 2022-01-04 | Raytheon Technologies Corporation | Additive manufactured powder processing system |
| CN108907189B (en) * | 2018-07-24 | 2024-02-20 | 华南理工大学 | Multi-material forming device and method based on metal 3D printing |
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