CN116833432A - Multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system - Google Patents
Multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system Download PDFInfo
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- CN116833432A CN116833432A CN202310902488.6A CN202310902488A CN116833432A CN 116833432 A CN116833432 A CN 116833432A CN 202310902488 A CN202310902488 A CN 202310902488A CN 116833432 A CN116833432 A CN 116833432A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002844 melting Methods 0.000 title claims abstract description 14
- 230000008018 melting Effects 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 title claims description 69
- 230000003247 decreasing effect Effects 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract 8
- 239000000835 fiber Substances 0.000 claims description 25
- 239000000109 continuous material Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000005350 fused silica glass Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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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
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
-
- 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]
-
- 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
- B22F10/60—Treatment of workpieces or articles after build-up
-
- 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
- B22F12/20—Cooling means
-
- 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
-
- 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
-
- 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
-
- 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
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The application discloses a multi-beam laser selective melting and femto-second composite material increasing and decreasing optical path system, which comprises a femto-second optical fiber laser, a continuous optical fiber laser, a collimating lens, a beam expander, a galvanometer and a focusing lens, wherein the femto-second optical fiber laser, the continuous optical fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in the laser transmission direction. The application combines and integrates the material-adding optical system and the femtosecond material-reducing defect-removing optical system, has compact and simple structure, convenient operation and high economical practicability.
Description
Technical Field
The application relates to the field of laser 3D printing and post-processing, in particular to a multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system.
Background
At present, the development of a laser 3D printing technology is quite mature, but the existing laser 3D printing equipment has the problem that the efficient compounding of additive printing and subtractive repairing cannot be carried out. Namely, additive printing and subtractive material repairing cannot be simultaneously satisfied; and even if the two materials are compounded, nanosecond laser is used for material reduction restoration, the processing size of the light source is generally smaller, large-size, high-efficiency and high-precision compound processing of material increase printing and material reduction restoration cannot be realized, and only single-light-path compounding of material increase printing light paths and material reduction restoration can be realized.
Accordingly, in view of the above problems in the prior art, there is a need to propose a corresponding solution.
Disclosure of Invention
The embodiment of the application provides a multi-beam laser selective melting and femtosecond composite material increasing and decreasing optical path system, which aims to solve the problem that large-size, high-efficiency and high-precision composite processing of additive printing and material reduction repairing cannot be realized in the prior art method.
In a first aspect, an embodiment of the present application provides a multi-beam laser selective melting and femto-second composite material increasing/decreasing optical path system, where the system includes a femto-second fiber laser, a continuous fiber laser, a collimator lens, a beam expander, a galvanometer and a focusing lens, and the femto-second fiber laser, the continuous fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in a laser transmission direction.
In a second aspect, an embodiment of the present application provides a method for performing composite processing of increasing and decreasing materials according to the system of claim 1, including:
after the divergent light output by the femtosecond fiber laser and the continuous fiber laser is collimated by the collimating lens, the beam is expanded by the beam expander to obtain a femtosecond material reduction beam and a continuous material increase beam;
the optical path transmission direction of the femtosecond material reduction beam is controlled by a reflecting mirror, the femtosecond material reduction beam is reflected to a beam splitter to split, and then enters a dichroic mirror together with the continuous material addition beam, or the femtosecond material reduction beam after the femtosecond material reduction beam is split by the beam splitter and then enters the dichroic mirror together with the continuous material addition beam;
the femtosecond material reduction light beam is fully transmitted and the continuous material addition light beam is fully reflected through the dichroic mirror, the processed material addition light path and the processed material reduction light path are transmitted into the vibrating mirror, and are focused through the focusing lens and then output, so that the processed material addition light path and the processed material reduction light path reach the working surface for compound processing.
The embodiment of the application provides a multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system. The system comprises a femtosecond fiber laser, a continuous fiber laser, a collimating lens, a beam expander, a galvanometer and a focusing lens, wherein the femtosecond fiber laser, the continuous fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in the laser transmission direction.
The application adopts an all-fiber type soft laser light path structure, and the material increasing and decreasing light beams output by the fiber laser are subjected to light path modulation through the collimating lens and the beam expanding lens, so that the purpose of a laser light source required by material increasing and decreasing composite processing is achieved; and then, the material increasing and decreasing light beams are simultaneously input into a high-precision scanning galvanometer and a high-stability focusing lens, and the laser light emitting and scanning are controlled by a control system. The application combines and integrates the material-adding optical system and the femtosecond material-reducing defect-removing optical system, has compact and simple structure, convenient operation and high economical practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-beam laser selective melting and femtosecond composite add-drop optical path system provided by an embodiment of the application;
FIG. 2 is a schematic diagram of a galvanometer focusing system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a shielding gas system of a galvanometer focusing system according to an embodiment of the present application;
fig. 4 is a flow chart of a method for processing composite materials according to the multi-beam laser selective melting and femto-second composite material increasing/decreasing optical path system.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
The embodiment of the application provides a multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system, and fig. 1 is a schematic diagram of the multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system provided by the embodiment of the application, and as shown in fig. 1, the system comprises a femtosecond fiber laser, a continuous fiber laser, a collimating lens, a beam expander, a galvanometer and a focusing lens.
Specifically, the femtosecond fiber laser, the continuous fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in the laser transmission direction.
Fig. 2 is a schematic structural diagram of a galvanometer focusing system according to an embodiment of the present application, as shown in fig. 2, it should be noted that a scanning galvanometer adopted in the galvanometer focusing system has a temperature compensation self-calibration function, so that accuracy of the galvanometer in a forming process can be ensured, a correction error of scanning accuracy is less than or equal to 50 μm, in addition, repeated positioning accuracy of the scanning galvanometer is relatively high, and a maximum scanning speed of X, Y axes is 7m/s. Preferably, the system also comprises a temperature control water cooling module which is used for controlling the thermal deformation generated by the scanning galvanometer, and the temperature fluctuation value is less than or equal to +/-0.5 ℃, so that the problem of product precision caused by the thermal deformation generated by the scanning galvanometer can be eliminated. The focusing lens in the vibrating mirror focusing system is a large-size F-theta lens, the lens material of the focusing lens is fused quartz, the diameter of a focusing light spot is 90 mu m, the quality of a light beam is stable when the optical system is operated for more than 200 hours, the diameter fluctuation of a formed light spot is less than or equal to +/-1 mu m, and the scanning precision deviation is less than or equal to +/-0.1 mm.
Fig. 3 is a schematic diagram of a shielding gas system of a galvanometer focusing system according to an embodiment of the application, as shown in fig. 3, preferably, a protective lens is disposed under a focusing lens (f-theta lens), and the focusing lens, the galvanometer and the external environment are separated by the protective lens, so as to prevent problems of precision reduction of molding parts and damage of optical lenses caused by adhesion of dust, impurities and the like on the surface of the lenses.
In one embodiment, the optical path system further includes a reflecting mirror and a dichroic mirror, as shown in fig. 1, where the reflecting mirror is disposed behind the beam expander and is coaxial with the beam expander in the laser transmission direction; the dichroic mirror is disposed behind the reflecting mirror and is coaxial with the reflecting mirror in the laser light transmitting direction.
In one embodiment, the optical path system further includes a beam splitter, as shown in fig. 1, which may be disposed between the mirror and the dichroic mirror and coaxial with the mirror and the dichroic mirror in a laser light conducting direction, for splitting the laser light. Alternatively, the beam splitter may be disposed between the beam expander and the reflecting mirror, and coaxial with the beam expander and the reflecting mirror in the laser light transmission direction, for splitting the laser light.
Through above-mentioned soft laser optical path system structure of full optic fibre formula, this embodiment carries out composite integration with material adding optical system and femto second and subtracts material defect and get rid of optical system, its compact structure, simple operation moreover, economical and practical is high.
The embodiment also provides a method for carrying out composite processing of increasing and decreasing materials according to the multi-beam laser selective melting and femto-second composite increasing and decreasing material optical path system, and fig. 4 is a flow chart of the method for carrying out composite processing of increasing and decreasing materials according to the multi-beam laser selective melting and femto-second composite increasing and decreasing material optical path system, which is provided by the embodiment of the application, as shown in fig. 4, and the method comprises steps S410 to S430.
S410, after the divergent light output by the femtosecond fiber laser and the continuous fiber laser is collimated by the collimating lens, the beam is expanded by the beam expander, and the femtosecond material reduction beam and the continuous material increase beam are obtained.
As shown in fig. 1, in this embodiment, 2 femtosecond fiber lasers and 4 continuous fiber lasers are used to output divergent laser respectively, and then the divergent light output by the lasers is collimated by a collimator lens, and then the beam is expanded by a beam expander lens, so as to obtain a femtosecond material-reduction beam and a continuous material-increase beam.
S420, controlling the optical path transmission direction of the femtosecond material reduction beam through a reflector, reflecting the femtosecond material reduction beam to a beam splitter for beam splitting, and then enabling the femtosecond material reduction beam and the continuous material addition beam to enter a dichroic mirror together, or controlling the femtosecond material reduction beam and the continuous material addition beam to enter the dichroic mirror together after the femtosecond material reduction beam is split through the beam splitter.
In this embodiment, the optical path transmission direction of 2 paths of femtosecond material reduction beams is controlled by the reflector, and after being reflected to the beam splitter to split, the 2 paths of femtosecond material reduction beams and 4 paths of continuous material addition beams enter the dichroic mirror together, or after being split by the beam splitter, the 2 paths of femtosecond material reduction beams and the 4 paths of continuous material addition beams enter the dichroic mirror together.
430. The femtosecond material reduction light beam is fully transmitted and the continuous material addition light beam is fully reflected through the dichroic mirror, the processed material addition light path and the processed material reduction light path are transmitted into the vibrating mirror, and are focused through the focusing lens and then output, so that the processed material addition light path and the processed material reduction light path reach the working surface for compound processing.
In this embodiment, the dichroic mirror is used to perform full transmission on the 4 paths of femtosecond material reduction beams and full reflection on the 4 paths of continuous material reduction beams, and the processed material reduction and increase optical paths are transmitted into the vibrating mirror, focused by the focusing lens and output, so as to reach the working surface for performing the combined processing of laser material reduction printing and femtosecond material reduction defect removal.
The method can be used for forming more than 50 metal powder materials including but not limited to titanium alloy, aluminum alloy, high-temperature alloy, cobalt-chromium alloy, stainless steel, high-strength steel, die steel, nickel-based alloy and the like, can be used for laser selective melt forming and micro defect removal on-line repairing of large and medium-size metal components with complex structures, can realize the manufacture of materials for increasing and decreasing easily-oxidized active metal materials, and can realize the manufacture of materials for increasing and decreasing commonly-used aviation metal materials. In addition, the formed part can be widely applied to various fields of aviation, aerospace, automobiles, medical treatment, scientific research and the like.
The application adopts an all-fiber type soft laser light path structure, and the material increasing and decreasing light beams output by the fiber laser are subjected to light path modulation through the collimating lens and the beam expanding lens, so that the purpose of a laser light source required by material increasing and decreasing composite processing is achieved; and then, the material increasing and decreasing light beams are simultaneously input into a high-precision scanning galvanometer and a high-stability focusing lens, and the laser light emitting and scanning are controlled by a control system. The application combines and integrates the material-adding optical system and the femtosecond material-reducing defect-removing optical system, has compact and simple structure, convenient operation and high economical practicability.
It will be apparent to those skilled in the art that the foregoing is merely illustrative of the present application, and the scope of the application is not limited thereto, and that various equivalent modifications and substitutions can be made by those skilled in the art within the scope of the present application, and these modifications and substitutions are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (8)
1. The multi-beam laser selective melting and femto-second composite material increasing and decreasing optical path system is characterized by comprising a femto-second optical fiber laser, a continuous optical fiber laser, a collimating lens, a beam expander, a vibrating mirror and a focusing lens, wherein the femto-second optical fiber laser, the continuous optical fiber laser, the beam expander, the vibrating mirror and the focusing lens are sequentially arranged in the laser conduction direction.
2. The system of claim 1, further comprising a mirror and a dichroic mirror,
the reflector is arranged behind the beam expander and is coaxial with the beam expander in the laser transmission direction;
the dichroic mirror is disposed behind the reflecting mirror and is coaxial with the reflecting mirror in the laser light conducting direction.
3. The system of claim 2, wherein the system comprises a beam splitter,
the beam splitter is disposed between the reflecting mirror and the dichroic mirror, and is coaxial with the reflecting mirror and the dichroic mirror in a laser light transmission direction, for splitting laser light.
4. The system of claim 2, wherein the system comprises a beam splitter,
the beam splitter is arranged between the beam expander and the reflecting mirror, and is coaxial with the beam expander and the reflecting mirror in the laser transmission direction, and is used for splitting laser.
5. The system of claim 1, wherein a protective mirror is disposed under the focusing lens, whereby the focusing lens, galvanometer, and external environment are separated by the protective mirror.
6. The system of claim 1, wherein the system further comprises: a temperature-control water-cooling module,
the temperature control water cooling module is used for controlling thermal deformation generated by the scanning galvanometer.
7. The system of claim 1, wherein the focusing lens is made of fused silica.
8. A method of additive and subtractive composite processing in accordance with the system of claim 1, said method comprising:
after the divergent light output by the femtosecond fiber laser and the continuous fiber laser is collimated by the collimating lens, the beam is expanded by the beam expander to obtain a femtosecond material reduction beam and a continuous material increase beam;
the optical path transmission direction of the femtosecond material reduction beam is controlled by a reflecting mirror, the femtosecond material reduction beam is reflected to a beam splitter to split, and then enters a dichroic mirror together with the continuous material addition beam, or the femtosecond material reduction beam after the femtosecond material reduction beam is split by the beam splitter and then enters the dichroic mirror together with the continuous material addition beam;
the femtosecond material reduction light beam is fully transmitted and the continuous material addition light beam is fully reflected through the dichroic mirror, the processed material addition light path and the processed material reduction light path are transmitted into the vibrating mirror, and are focused through the focusing lens and then output, so that the processed material addition light path and the processed material reduction light path reach the working surface for compound processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310902488.6A CN116833432A (en) | 2023-07-21 | 2023-07-21 | Multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310902488.6A CN116833432A (en) | 2023-07-21 | 2023-07-21 | Multi-beam laser selective melting and femtosecond composite increase-decrease material optical path system |
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| CN116833432A true CN116833432A (en) | 2023-10-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117505887A (en) * | 2023-10-31 | 2024-02-06 | 中国科学技术大学苏州高等研究院 | Zinc oxide semiconductor laser additive manufacturing system and process method |
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2023
- 2023-07-21 CN CN202310902488.6A patent/CN116833432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117505887A (en) * | 2023-10-31 | 2024-02-06 | 中国科学技术大学苏州高等研究院 | Zinc oxide semiconductor laser additive manufacturing system and process method |
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