CN110560688A - Additive manufacturing method - Google Patents
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- CN110560688A CN110560688A CN201910900115.9A CN201910900115A CN110560688A CN 110560688 A CN110560688 A CN 110560688A CN 201910900115 A CN201910900115 A CN 201910900115A CN 110560688 A CN110560688 A CN 110560688A
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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
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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
- B22F10/362—Process control of energy beam parameters for preheating
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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
- B22F10/30—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
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
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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
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation 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
- 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
- B22F12/40—Radiation means
- B22F12/49—Scanners
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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)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field related to additive manufacturing, and discloses an additive manufacturing method, which comprises the following steps: (1) providing an additive manufacturing device, wherein the device comprises a laser and a light splitting and scanning assembly which are oppositely arranged, the laser emits a laser beam to the light splitting and scanning assembly, the light splitting and scanning assembly divides the laser beam into two laser beams with different energies, namely a first laser beam and a second laser beam, and the power of the first laser beam is smaller than that of the second laser beam; (2) the first laser beam preheats powder on the device or scans the outline of the part to be formed, and the second laser beam melts and scans the preheated powder or melts and scans the powder in the outline, so as to finish the processing of the part to be formed. According to the invention, the low-power laser beam and the high-power laser beam work cooperatively, so that the forming precision, the surface quality and the forming efficiency are improved, and the microstructure and the mechanical property are improved.
Description
Technical Field
the invention belongs to the technical field related to additive manufacturing, and particularly relates to an additive manufacturing method.
Background
the additive manufacturing technology is based on the principle of discrete-accumulation, and under the action of high-energy beam current, materials are rapidly accumulated and overlapped point by point layer by layer to form a preset three-dimensional entity. The metal additive manufacturing technology, one of the most potential additive manufacturing technologies, is a technology of melting metal powder by using a high-energy beam according to a specific scanning path, processing layer by layer, stacking layer by layer, and rapidly forming a solid body. The technology can rapidly and precisely manufacture parts with any complex shapes without the need of traditional tools, clamps and a plurality of processing procedures, realizes the free forging of the parts, solves the forming of a plurality of parts with complex structures, and greatly shortens the processing period. Therefore, the technology has important application value in the fields of aerospace, weaponry, medical treatment and the like.
However, with the rapid development of this technology, corresponding disadvantages are also exposed: the forming efficiency is low, the forming precision cannot be compared with the traditional processing mode, the applicable materials are limited, internal defects such as air holes and cracks cannot be completely avoided, and the like, and particularly the further development of the metal additive manufacturing technology is limited by the low forming efficiency and the low precision. Generally, lower machining efficiency can achieve high accuracy but lower forming efficiency, which can be improved by increasing power, but high power can degrade accuracy. Therefore, how to combine the forming efficiency and the forming precision is a problem to be solved urgently at present.
Disclosure of Invention
In view of the above defects or improvement needs of the prior art, the present invention provides an additive manufacturing method, which is based on the characteristics of the existing additive manufacturing, and researches and designs an additive manufacturing method with good precision and efficiency. The additive manufacturing method comprises the steps that two laser beams with different energy are generated through a prism/semi-transparent and semi-reflective mirror and other light splitting devices, a high-power large-light-spot laser beam is used for filling a solid body, and a low-power small-light-spot laser beam is used for scanning a contour/preheating a powder matrix; when the low-power small-light-spot laser beam is used for scanning the outline, the high-power large-light-spot laser beam is subjected to solid filling in every other layer; when the low-power small-spot laser beam is used for preheating the matrix powder, the high-power large-spot laser beam and the low-power small-spot laser beam cooperate to perform processing scanning, so that the low-power laser beam is used for performing contour scanning/preheating on the matrix powder, the forming precision and the surface quality are improved, the microstructure and the mechanical property are improved, the high-power laser beam is used for filling the entity, the forming efficiency is greatly improved, and the method is simple, easy to implement and low in cost.
To achieve the above object, the present invention provides an additive manufacturing method, which mainly includes the following steps:
(1) Providing an additive manufacturing device, wherein the device comprises a laser and a light splitting scanning assembly which are arranged oppositely, the laser emits a laser beam to the light splitting scanning assembly, the light splitting scanning assembly divides the laser beam into two laser beams with different energies, namely a first laser beam and a second laser beam, and the power of the first laser beam is smaller than that of the second laser beam;
(2) The first laser beam preheats the powder on the device or scans the outline of the part to be formed, and the second laser beam melts and scans the preheated powder or melts and scans the powder in the outline, so that the part to be formed is processed.
further, before the step (2), the step of vacuumizing or filling inert gas into the forming cavity of the device is also included.
Further, the step (2) comprises the following specific steps:
(21) The first laser beam scans and processes the outline of the part to be molded, after the current layer is scanned, the molding cylinder of the device descends by one layer thickness, the molding device spreads powder, and then the first laser beam scans and processes the outline;
(22) repeating the step (21), and after the scanning processing of the outline with the preset number of layers is finished, performing one-time filling scanning on the powder inside the outline by using the second laser beam to form a solid body;
(23) And (5) repeating the step (21) and the step (22) until the integral forming of the whole part to be formed is completed.
further, the step (2) comprises the following specific steps:
(a) The first laser beam preheats powder on the device, then the second laser beam carries out melting forming on the preheated powder, after the current layer is finished, a forming cylinder of the device descends by a layer thickness height, the device carries out powder laying, and the first laser beam and the second laser beam successively preheat the powder and scan solid parts;
(b) and (c) repeating the step (a) until the integral forming of the whole part to be formed is completed.
furthermore, the light splitting scanning assembly comprises a light splitting piece and two scanning systems, and the two scanning systems are arranged around the light splitting piece; the light splitting piece is used for splitting the received laser beam into two laser beams with different energies, and the two obtained laser beams are respectively emitted from the light outlet after passing through the two scanning systems, so that a first laser beam and a second laser beam are obtained.
Further, the light splitting component is a prism or a semi-transparent and semi-reflective mirror.
Further, the material of the powder includes any one or more of a titanium alloy, a high temperature alloy, an iron-based alloy, an aluminum alloy, a magnesium alloy, and a copper alloy.
Further, the predetermined number of layers is equal to or greater than 5.
Generally, compared with the prior art, the additive manufacturing method provided by the invention mainly has the following beneficial effects:
1. The beam splitting scanning assembly divides the laser beam into two laser beams with different energies, namely a first laser beam and a second laser beam, wherein the power of the first laser beam is smaller than that of the second laser beam, so that the simultaneous processing of the laser beams with different powers is realized, the method is simple, the cost is reduced, the efficiency is improved, and the applicability is strong.
2. the first laser beam is right the powder on the device preheats or treats the profile of shaping part and scan the processing, adopts the little facula laser beam scanning profile of low-power, and the facula diameter of the little facula of low-power is less, and the precision on shaping entity surface is higher in the forming process, and on the other hand facula diameter is less also can make shaping entity surface quality better, and shaping entity surface is more level and smooth, and the phenomenon of too big fluctuation can not appear, has improved microstructure and mechanical properties, has improved the quality of shaping piece.
3. The second laser beam melts and scans the preheated powder or melts and scans the powder in the outline and shapes, so that the high-power large-spot laser beam is adopted to scan and fill the entity at intervals of a plurality of layers, the layer thickness of the plurality of layers of entities is large, the high-power laser beam is just needed to melt, and the method is equivalent to the method of adopting the high-power laser beam to shape a plurality of layers of entities at one time.
4. the forming cavity of the device is vacuumized or filled with inert gas, so that the powder is prevented from being oxidized when being acted with the laser beam, and the forming quality is ensured.
Drawings
Fig. 1 is a schematic flow chart of an additive manufacturing method according to a first embodiment of the present invention;
Fig. 2 is a process schematic diagram of an additive manufacturing method according to a second embodiment of the invention;
Fig. 3 is a process schematic diagram of an additive manufacturing method according to a third embodiment of the present invention.
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-laser beam, 11-first laser beam, 12-second laser beam, 2-first beam splitting and scanning assembly, 21-second beam splitting and scanning assembly, 3-profile area, 4-solid area, 31-shaping plane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, an additive manufacturing method according to a first embodiment of the present invention mainly includes the following steps:
step one, providing an additive manufacturing device, wherein the device comprises a laser and a light splitting scanning assembly which are arranged oppositely, the laser emits a laser beam to the light splitting scanning assembly, the light splitting scanning assembly divides the laser beam into two laser beams with different energies, namely a first laser beam and a second laser beam, and the power of the first laser beam is smaller than that of the second laser beam.
Before processing and forming, the air in the forming cavity is replaced by vacuum or inert gas, so that the powder is prevented from being oxidized when acting with laser, and the forming quality is ensured.
And secondly, preheating the powder on the device or scanning the outline of the part to be formed by the first laser beam, and carrying out melting scanning forming on the preheated powder or melting scanning forming on the powder in the outline by the second laser beam so as to finish the processing of the part to be formed.
Referring to fig. 2, an additive manufacturing method according to a second embodiment of the present invention mainly includes the following steps:
(1) providing an additive manufacturing device, wherein the device comprises a laser and a light splitting scanning assembly which are arranged oppositely, the laser emits a laser beam to the light splitting scanning assembly, the light splitting scanning assembly divides the laser into two laser beams with different energy, the two laser beams are a first laser beam and a second laser beam respectively, and the power of the first laser beam is smaller than that of the second laser beam.
specifically, the additive manufacturing device comprises a laser and a first beam splitting scanning assembly 2 which are arranged oppositely, a forming cylinder and a forming platform, wherein the forming cylinder is connected to the forming platform and is positioned below the forming platform. The first light splitting scanning assembly 2 comprises a light splitting part and two sets of scanning systems. The laser is used for emitting a laser beam 1, the laser beam 1 enters the light splitting part, the light splitting part divides the received laser beam into two laser beams with different energies, the two obtained laser beams respectively pass through the two scanning systems and then are emitted from a light outlet, so that a first laser beam 11 and a second laser beam 12 are obtained, the first laser beam 11 is a low-power small-spot laser beam, the second laser beam 12 is a high-power large-spot laser beam, and the power of the first laser beam 11 is smaller than that of the second laser beam 12.
(2) the first laser beam scans and processes the outline of the part to be molded, after the current layer is scanned, the molding cylinder of the device descends by one layer thickness, the molding device spreads powder, and then the first laser beam scans and processes the outline again.
Specifically, the first laser beam 11 scans and processes the profile of the part to be molded, after the scanning is completed on the current layer, the forming cylinder directly spreads powder after descending by a layer thickness, and the first laser beam 11 scans the profile again.
(3, repeating the step (2), and after the scanning processing of the outline with the preset number of layers is finished, performing one-time filling scanning on the powder inside the outline by the second laser beam to form a solid body.
Specifically, the step (2) is repeated, after n layers (n is more than or equal to 2, n is an integer, and a corresponding numerical value is selected according to the process parameters) of the contour are processed, the second laser beam 12 performs one-time filling scanning on the powder inside the contour to form a solid body.
(4) And (4) repeating the step (2) and the step (3) until the integral forming of the whole part to be formed is completed. In this embodiment, the low-power first laser beam 11 scans the profile to ensure the forming accuracy and the surface quality, and the high-power second laser beam 12 scans the filling entity at intervals of several layers, thereby greatly improving the forming efficiency.
Referring to fig. 3, an additive manufacturing method according to a third embodiment of the present invention mainly includes the following steps:
And S1, providing an additive manufacturing device, wherein the device comprises a laser and a light splitting and scanning assembly which are oppositely arranged, the laser emits a laser beam to the light splitting and scanning assembly, the light splitting and scanning assembly divides the laser into two laser beams with different energies, namely a first laser beam and a second laser beam, and the power of the first laser beam is smaller than that of the second laser beam.
specifically, the additive manufacturing device comprises a laser and a second beam splitting scanning assembly 21 which are arranged oppositely, and a forming cylinder and a forming platform, wherein the forming cylinder is connected to the forming platform and is positioned below the forming platform. The second spectroscopic scanning assembly 21 includes a spectroscopic component and two scanning systems. The laser is used for emitting a laser beam 1, the laser beam 1 enters the light splitting part, the light splitting part divides the received laser beam into two laser beams with different energies, the two obtained laser beams respectively pass through the two scanning systems and then are emitted from a light outlet, so that a first laser beam 11 and a second laser beam 12 are obtained, the first laser beam 11 is a low-power small-spot laser beam, the second laser beam 12 is a high-power large-spot laser beam, and the power of the first laser beam 11 is smaller than that of the second laser beam 12. In this embodiment, the light splitter is a prism or a semi-transparent and semi-reflective mirror.
s2, preheating the powder on the device by the first laser beam, then melting and forming the preheated powder by the second laser beam, after the current layer is finished, descending the thickness of one layer by a forming cylinder of the device, spreading the powder by the device, and preheating the powder and scanning the solid part by the first laser beam and the second laser beam.
in particular, the first laser beam 11 is used to preheat the powder and the second laser beam 12 is used to scan the solid part to increase the temperature of the powder. The first laser beam 11 first preheats the powder in the molding surface 31, and the second laser beam 12 performs melt molding on the preheated powder. In this embodiment, the first laser beam 11 and the second laser beam 12 cooperate to achieve synchronous scanning of preheating and solid filling, improve the microstructure of the part, and provide the forming quality and mechanical properties.
In the present embodiment, the material of the powder includes a metal material such as a titanium alloy, a high-temperature alloy, an iron-based alloy, an aluminum alloy, a magnesium alloy, or a copper alloy.
And S3, repeating the step S2 until the integral forming of the whole part to be formed is completed.
the additive manufacturing method provided by the invention is characterized in that a single beam of high-power laser is input, and is subjected to uneven light splitting through a prism or a semi-transparent and semi-reflective mirror and other devices to obtain two laser beams (a high-power large-spot laser beam and a low-power small-spot laser beam) with different energies, wherein each laser beam is provided with a corresponding galvanometer scanning system, the high-power large-spot laser beam is used for filling a solid, and the low-power small-spot laser beam is used for scanning a contour. In addition, the low-power laser beam scans layer by layer, and the high-power laser beam completes filling of powder inside the n-layer one-time scanning contour.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method of additive manufacturing, the method comprising the steps of:
(1) Providing an additive manufacturing device, wherein the device comprises a laser and a light splitting and scanning assembly which are oppositely arranged, the laser emits a laser beam (1) to the light splitting and scanning assembly, the light splitting and scanning assembly divides the laser beam (1) into two laser beams with different energies, namely a first laser beam (11) and a second laser beam (12), and the power of the first laser beam (11) is smaller than that of the second laser beam (12);
(2) the first laser beam (11) preheats powder on the device or scans and processes the outline of the part to be formed, and the second laser beam (12) melts and scans and forms the preheated powder or melts and scans and forms the powder in the outline, so that the part to be formed is processed.
2. The additive manufacturing method of claim 1, wherein: before the step (2), the step of vacuumizing or filling inert gas into the forming cavity of the device is further included.
3. The additive manufacturing method of claim 1, wherein: the step (2) comprises the following specific steps:
(21) The first laser beam (11) scans and processes the outline of the part to be molded, after the scanning is finished on the current layer, the molding cylinder of the device descends by a layer thickness height, the molding device spreads powder, and then the first laser beam (11) scans and processes the outline;
(22) Repeating the step (21), and after the scanning processing of the outline with the preset number of layers is finished, performing one-time filling scanning on the powder in the outline by using the second laser beam (12) to form a solid body;
(23) And (5) repeating the step (21) and the step (22) until the integral forming of the whole part to be formed is completed.
4. The additive manufacturing method of claim 1, wherein: the step (2) comprises the following specific steps:
(a) The first laser beam (11) preheats powder on the device, then the second laser beam (12) melts and forms the preheated powder, after the current layer is finished and a forming cylinder of the device descends by a layer thickness height, the device spreads the powder, and the first laser beam (11) and the second laser beam (12) preheat the powder and scan solid parts in sequence;
(b) And (c) repeating the step (a) until the integral forming of the whole part to be formed is completed.
5. The additive manufacturing method of claim 1, wherein: the light splitting scanning assembly comprises a light splitting piece and two scanning systems, and the two scanning systems are arranged around the light splitting piece; the light splitting piece is used for splitting the received laser beam into two laser beams with different energies, and the two obtained laser beams are emitted from a light outlet after passing through the two scanning systems respectively, so that a first laser beam (11) and a second laser beam (12) are obtained.
6. the additive manufacturing method of claim 5, wherein: the light splitting piece is a prism or a semi-transparent and semi-reflective mirror.
7. The additive manufacturing method of claim 1, wherein: the material of the powder includes any one or more of a titanium alloy, a high temperature alloy, an iron-based alloy, an aluminum alloy, a magnesium alloy, and a copper alloy.
8. The additive manufacturing method of claim 3, wherein: the predetermined number of layers is 5 or more.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900115.9A CN110560688A (en) | 2019-09-23 | 2019-09-23 | Additive manufacturing method |
| PCT/CN2020/116830 WO2021057725A1 (en) | 2019-09-23 | 2020-09-22 | Additive manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910900115.9A CN110560688A (en) | 2019-09-23 | 2019-09-23 | Additive manufacturing method |
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Cited By (7)
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| CN112024875A (en) * | 2020-08-18 | 2020-12-04 | 清华大学 | Powder bed synchronous heating melting additive manufacturing method |
| CN112388107A (en) * | 2020-11-11 | 2021-02-23 | 福州大学 | Additive manufacturing forming geometry online monitoring and correcting method |
| WO2021057725A1 (en) * | 2019-09-23 | 2021-04-01 | 华中科技大学 | Additive manufacturing method |
| CN114131042A (en) * | 2021-11-02 | 2022-03-04 | 西安航天发动机有限公司 | Method and device for preparing sandwich runner structural member |
| CN114131049A (en) * | 2021-12-21 | 2022-03-04 | 宜宾上交大新材料研究中心 | Additive manufacturing method of copper and copper alloy |
| CN114770933A (en) * | 2022-04-21 | 2022-07-22 | 深圳市华阳新材料科技有限公司 | Combined type 3D printing and scanning method |
| CN114951690A (en) * | 2021-02-22 | 2022-08-30 | 广东汉邦激光科技有限公司 | Method and apparatus for forming three-dimensional model |
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| CN110560688A (en) * | 2019-09-23 | 2019-12-13 | 华中科技大学 | Additive manufacturing method |
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