CN109047764A - A kind of powder supply mechanism and method that more material laser selective melting powder subregions are preset - Google Patents
A kind of powder supply mechanism and method that more material laser selective melting powder subregions are preset Download PDFInfo
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- CN109047764A CN109047764A CN201811107901.5A CN201811107901A CN109047764A CN 109047764 A CN109047764 A CN 109047764A CN 201811107901 A CN201811107901 A CN 201811107901A CN 109047764 A CN109047764 A CN 109047764A
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- 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
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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
- 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
- B22F12/22—Driving means
- B22F12/224—Driving means for motion along a direction within the plane of a layer
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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
-
- 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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- 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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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
Abstract
本发明公开了一种多材料激光选区熔化粉末分区预置的铺粉机构及方法；包括X轴导轨单元和Y轴导轨单元上；X轴导轨单元用于搭载储粉槽沿Y轴导轨单元的轨迹在Y方向往复水平移动；储粉槽内置有一分区挡板，分区挡板将储粉槽在长度方向上分成两个用于储存不同材质粉末的储粉区；该分区挡板可沿着储粉槽的长度方向移动。本机构储粉槽在平台的加工区域返回至非加工区域后，完成一个铺粉行程；储粉槽在由加工区域返回至非加工区域的行程过程中，柔性铺粉条将不同材质的粉末以分区挡板为界，刮平在加工区域的平台上，形成一个包含多种材质的粉末层；即实现在一个铺粉行程内不同Y坐标下的X方向上铺设不同材质的粉末。
The invention discloses a powder laying mechanism and method for multi-material laser selective melting powder partition preset; it includes an X-axis guide rail unit and a Y-axis guide rail unit; the X-axis guide rail unit is used to carry a powder storage tank along the Y-axis guide rail unit The trajectory reciprocates and moves horizontally in the Y direction; there is a partition baffle built into the powder storage tank, and the partition baffle divides the powder storage tank into two powder storage areas in the length direction for storing powders of different materials; the partition baffle can be moved along the The length direction of the powder chute moves. After the powder storage tank of this mechanism returns from the processing area of the platform to the non-processing area, a powder spreading stroke is completed; during the journey of the powder storage tank returning from the processing area to the non-processing area, the flexible powder spreading bar separates the powders of different materials into partitions The baffle is used as the boundary, and it is scraped flat on the platform in the processing area to form a powder layer containing various materials; that is, powders of different materials can be laid in the X direction under different Y coordinates within one powder spreading stroke.
Description
Technical field
The present invention relates in more material laser selective melting equipment powdering component more particularly to a kind of choosing of more material lasers
Melt the preset powder supply mechanism and method of powder subregion in area.
Background technique
Selective laser smelting technology is the pith in metal 3D printing field, and development course undergoes low melting point nonmetallic
Powder sintered, low melting point cladding high-melting-point is powder sintered, high-melting-point powder directly melt the stages such as shape.By Texas ,Usa
University's Austin was applied for a patent earliest in 1986, the 1st SLM device had been succeeded in developing within 1988, using fine focus
Hot spot rapid melting can almost directly obtain arbitrary shape and have metallurgy completely at 30~51 μm of fore-put powder material
In conjunction with function part, consistency can reach intimate 100%, dimensional accuracy up to 20~50 μm, surface roughness up to 20~30 μm,
It is a kind of rapid prototyping technology of great development prospect.
The basic principle is that first designing part using 3D sculpting softwares such as Pro/e, UG, CATIA on computers
Then three-dimensional entity model carries out slicing delamination to the threedimensional model by Slice Software, obtains the outline data in each section, by
Outline data generates filling scan path, and equipment will fill scan line according to these, and control the gold of each layer of laser beam selective melting
Belong to dusty material, is gradually stacked into 3-dimensional metal part.
Selective laser smelting technology is generally all served only for the molding of single metal/non-metal material at present, and is used for a variety of materials
The implementation method of material is few.For realization selective laser smelting technology forming composite part, therefore design a kind of more materials
The preset powder supply mechanism of powder subregion of selective laser melting unit.
Summary of the invention
It is molten to provide a kind of more material laser constituencies for the shortcomings that it is an object of the invention to overcome the above-mentioned prior art and deficiency
Change powder subregion preset powder supply mechanism and method.Present invention can be implemented in the X-directions under Y coordinates different in a powdering stroke
The upper powder for being laid with unlike material.
The present invention is achieved through the following technical solutions:
A kind of powder supply mechanism that more material laser selective melting powder subregions are preset, including molding room and the linkage of two axis two move
Moving platform；The linkage of two axis two mobile platform comprising an X-axis guide rail unit 3 and two Y-axis guide rail lists being placed in parallel
Member 1,2；
The both ends of the X-axis guide rail unit 3 are placed on Y-axis guide rail unit 1,2, and are hung down with the axis of Y-axis guide rail unit 1,2
Directly；
The X-axis guide rail unit 3 stores up powder tank 5 along the track of Y-axis guide rail unit 1,2 reciprocal horizontal in the Y direction for carrying
It is mobile；The storage powder tank 5 is fixed on the sliding block of X-axis guide rail unit 3 by being separately mounted to the pressure pin 7 at its both ends；The storage powder
The cross sectional shape of the dust outlet of slot 5 is tapered；Lateral margin at dust outlet is equipped with the linking strip 6 for fixing powdering item；
The storage powder tank 5 is built-in with a subregion baffle 4, and subregion baffle 4 is divided into two use for powder tank 5 is stored up in the longitudinal direction
In the Chu Fenqu of storage unlike material powder；The subregion baffle 4 can be moved along the length direction of storage powder tank 5；
The motor control X-axis guide rail unit 3 of Y-axis guide rail unit 1,2 is past in the Y direction along the track of Y-axis guide rail unit 1,2
It moves horizontally again；The upper end of subregion baffle 4 is fixed on the sliding block of X-axis guide rail unit 3, the motor control point of X-axis guide rail unit 3
Area's baffle 4 is moved in the length direction of storage powder tank 5 along the track reciprocal horizontal of X-axis guide rail unit 3.
This two Y-axis guide rail units 1,2 being placed in parallel, which are located at, forms indoor outside, and the X-axis guide rail unit 3 is in the side X
To molding room is passed through, both ends are fixed on the sliding block of Y-axis guide rail unit 1,2；Between the X-axis guide rail unit 3 and molding room
Using fold the sealing of organ cover or symmetrically open up on molding room two sidewalls slat track grooved rail, the two of X-axis guide rail unit 3
End is across the slat track grooved rail.
The contact position of subregion baffle 4 and storage powder tank 5 is equipped with sealing strip；The shape of subregion baffle 4 and the inner section of storage powder tank 5
Shape is corresponding.
The quantity of the subregion baffle 4 be one or more than one.
The powdering item is flexible powdering item, through bolt clamping on linking strip 6.
The pressure pin 7 is fixed by screws on the sliding block of X-axis guide rail unit 3.
A kind of laying method of the X-direction tiling various material powder in the same bisque, includes the following steps:
Two axis two link mobile platform start-up operation, i.e. its sliding block of the motor control of Y-axis guide rail unit 1,2 in the Y direction
It is mobile, and storage powder tank 5 and X-axis guide rail unit 3 is driven to be moved to the non-processing region of platform with the sliding block of Y-axis；X-axis guide rail unit
Its sliding block X-direction of 3 motor control is mobile, and position of the control partition baffle 4 in storage powder tank 5, subregion baffle 4 is in storage powder at this time
Stop place in slot 5 be in X-direction unlike material powder in the position in the line of demarcation of the X-direction of the same bisque；Again will
The powder of two kinds of unlike materials is boundary with subregion baffle 4, is packed into the Chu Fenqu of 4 left and right sides of subregion baffle；
After powder packing, powdering process is initially entered, its sliding block Y-direction of the motor control of Y-axis guide rail unit 1,2 is moved
It is dynamic, drive storage powder tank 5 to move in the Y-direction of the machining area of platform, simultaneously the motor control of X-axis guide rail unit 3 its
Sliding block X-direction is mobile, and subregion baffle 4 is driven to slide in X direction in storage powder tank 5；
Powder tank 5 is stored up after the machining area of platform is back to non-processing region, completes a powdering stroke；Storage powder tank 5 exists
It is back to by machining area in the stroke in non-processing region, flexible powdering item is by the powder of unlike material with subregion baffle 4
It for boundary, strikes off on the platform of machining area, forms the powder bed comprising various material；Realize in a powdering stroke
The powder of unlike material is laid in X-direction under interior difference Y coordinate.
The present invention compared with the existing technology, have following advantages and effects
The present invention stores up powder tank 5 and is built-in with a subregion baffle 4, and subregion baffle 4 is divided into two for powder tank 5 is stored up in the longitudinal direction
For storing the Chu Fenqu of unlike material powder；The subregion baffle 4 can be moved along the length direction of storage powder tank 5；Y-axis guide rail list
Along the track of Y-axis guide rail unit 1,2, reciprocal horizontal moves the motor control X-axis guide rail unit 3 of member 1,2 in the Y direction；Subregion gear
The upper end of plate 4 is fixed on the sliding block of X-axis guide rail unit 3, and the motor control subregion baffle 4 of X-axis guide rail unit 3 is in storage powder tank 5
Length direction moved along the track reciprocal horizontal of X-axis guide rail unit 3.The present invention carries storage by two axis two linkage mobile platform
Powder tank 5 moves, by the way that subregion baffle 4 is arranged in storage powder tank 5, even if storage powder tank 5 can carry various material powder, when subregion is kept off
When plate 4 is moved to any end of storage powder tank 5, single material powder can be only loaded, realizes same layer single dusty material paving
If same layer X-direction various material powder may be implemented when subregion baffle 4 is moved to the designated position among storage powder tank 5
It is laid with.
The present invention stores up powder tank 5 after the machining area of platform is back to non-processing region, completes a powdering stroke；Chu Fen
Slot 5 is in the stroke for being back to non-processing region by machining area, and flexible powdering item is by the powder of unlike material with subregion
Baffle 4 is boundary, is struck off on the platform of machining area, and the powder bed comprising various material is formed；It realizes and is spread at one
The powder of unlike material is laid in X-direction in powder stroke under different Y coordinates.The present invention can also be by increasing subregion baffle 4
Quantity, to realize the laying of two or more unlike material powder.
For the present invention compared with existing selective laser melting unit power spreading device mechanism, the present invention realizes multiple material powder
End is laid in the subregion of forming surface X-direction and the unlike material powder of Z-direction is laid with, to melt scheme using selective laser
The increasing material manufacturing technique for realizing composite material, provides and is skillfully constructed and easy-to-use technical solution.
Detailed description of the invention
Fig. 1 is two axis two linkage mobile platform schematic diagram of the invention.
Fig. 2 is present invention storage powder tank structural schematic diagram.
Fig. 3 is the cross section structure schematic diagram for storing up powder tank.
Fig. 4 is powder supply mechanism application example schematic diagram of the present invention；A and B refers to the powder without material in figure, and C, which refers to, to be added
Work area domain.
Specific embodiment
The present invention is more specifically described in detail combined with specific embodiments below.
Embodiment
As shown in Figs 1-4.The invention discloses a kind of powder supply mechanism that more material laser selective melting powder subregions are preset,
Including molding room and two axis two linkage mobile platform；The linkage of two axis two mobile platform comprising an X-axis guide rail unit 3
With two Y-axis guide rail units being placed in parallel 1,2；
The both ends of the X-axis guide rail unit 3 are placed on Y-axis guide rail unit 1,2, and are hung down with the axis of Y-axis guide rail unit 1,2
Directly；
The X-axis guide rail unit 3 stores up powder tank 5 along the track of Y-axis guide rail unit 1,2 reciprocal horizontal in the Y direction for carrying
It is mobile；The storage powder tank 5 is fixed on the sliding block of X-axis guide rail unit 3 by being separately mounted to the pressure pin 7 at its both ends；The storage powder
The cross sectional shape of the dust outlet of slot 5 is tapered；Lateral margin at dust outlet is equipped with the linking strip 6 for fixing powdering item；
The storage powder tank 5 is built-in with a subregion baffle 4, and subregion baffle 4 is divided into two use for powder tank 5 is stored up in the longitudinal direction
In the Chu Fenqu of storage unlike material powder；The subregion baffle 4 can be moved along the length direction of storage powder tank 5；
The motor control X-axis guide rail unit 3 of Y-axis guide rail unit 1,2 is past in the Y direction along the track of Y-axis guide rail unit 1,2
It moves horizontally again；The upper end of subregion baffle 4 is fixed on the sliding block of X-axis guide rail unit 3, the motor control point of X-axis guide rail unit 3
Area's baffle 4 is moved in the length direction of storage powder tank 5 along the track reciprocal horizontal of X-axis guide rail unit 3.
This two Y-axis guide rail units 1,2 being placed in parallel, which are located at, forms indoor outside, and the X-axis guide rail unit 3 is in the side X
To molding room is passed through, both ends are fixed on the sliding block of Y-axis guide rail unit 1,2；Between the X-axis guide rail unit 3 and molding room
Using fold the sealing of organ cover or symmetrically open up on molding room two sidewalls slat track grooved rail, the two of X-axis guide rail unit 3
End is across the slat track grooved rail.
The contact position of subregion baffle 4 and storage powder tank 5 is equipped with sealing strip；The shape of subregion baffle 4 and the inner section of storage powder tank 5
Shape is corresponding.
The quantity of the subregion baffle 4 be one or more than one.
The powdering item is flexible powdering item, through bolt clamping on linking strip 6.
The pressure pin 7 is fixed by screws on the sliding block of X-axis guide rail unit 3.
A kind of laying method of the X-direction tiling various material powder in the same bisque, can be achieved by the steps of:
Two axis two link mobile platform start-up operation, i.e. its sliding block of the motor control of Y-axis guide rail unit 1,2 in the Y direction
It is mobile, and storage powder tank 5 and X-axis guide rail unit 3 is driven to be moved to the non-processing region of platform with the sliding block of Y-axis；X-axis guide rail unit
Its sliding block X-direction of 3 motor control is mobile, and position of the control partition baffle 4 in storage powder tank 5, subregion baffle 4 is in storage powder at this time
Stop place in slot 5 be in X-direction unlike material powder in the position in the line of demarcation of the X-direction of the same bisque；Again will
The powder of two kinds of unlike materials is boundary with subregion baffle 4, is packed into the Chu Fenqu of 4 left and right sides of subregion baffle；
After powder packing, powdering process is initially entered, its sliding block Y-direction of the motor control of Y-axis guide rail unit 1,2 is moved
It is dynamic, drive storage powder tank 5 to move in the Y-direction of the machining area of platform, simultaneously the motor control of X-axis guide rail unit 3 its
Sliding block X-direction is mobile, and subregion baffle 4 is driven to slide in X direction in storage powder tank 5；
Powder tank 5 is stored up after the machining area of platform is back to non-processing region, completes a powdering stroke；Storage powder tank 5 exists
It is back to by machining area in the stroke in non-processing region, flexible powdering item is by the powder of unlike material with subregion baffle 4
It for boundary, strikes off on the platform of machining area, forms the powder bed comprising various material；Realize in a powdering stroke
The powder of unlike material is laid in X-direction under interior difference Y coordinate.
After powdering completes one layer, selective laser melting unit can enter normal melting operation；Different materials after powder fusing
The powder of matter is frozen into entity, and layer processing is completed；It repeats the above steps, until completing the process.
As described above, the present invention can be better realized.
Embodiment of the present invention are not limited by the above embodiments, other are any without departing from Spirit Essence of the invention
With changes, modifications, substitutions, combinations, simplifications made under principle, equivalent substitute mode should be, be included in of the invention
Within protection scope.
Claims (7)
1. a kind of powder supply mechanism that more material laser selective melting powder subregions are preset, including molding room and the linkage movement of two axis two
Platform；The mobile platform it is characterized by: two axis two links comprising an X-axis guide rail unit (3) and two are placed in parallel
Y-axis guide rail unit (1,2)；
The both ends of the X-axis guide rail unit (3) are placed on Y-axis guide rail unit (1,2), and the axis with Y-axis guide rail unit (1,2)
Vertically；
The X-axis guide rail unit (3) is for carrying storage powder tank (5) along the track of Y-axis guide rail unit (1,2) in the Y direction toward rehydration
Translation is dynamic；The storage powder tank (5) is fixed on the sliding block of X-axis guide rail unit (3) by being separately mounted to the pressure pin (7) at its both ends；
The cross sectional shape of the dust outlet of storage powder tank (5) is tapered；Lateral margin at dust outlet is equipped with for fixing powdering item
Linking strip (6)；
The storage powder tank (5) is built-in with a subregion baffle (4), and subregion baffle (4) will store up powder tank (5) and be divided into two in the longitudinal direction
A Chu Fenqu for being used to store unlike material powder；The subregion baffle (4) can be mobile along the length direction of storage powder tank (5)；
The motor control X-axis guide rail unit (3) of Y-axis guide rail unit (1,2) along the track of Y-axis guide rail unit (1,2) in the Y direction
Reciprocal horizontal is mobile；The upper end of subregion baffle (4) is fixed on the sliding block of X-axis guide rail unit (3), the electricity of X-axis guide rail unit (3)
Machine control partition baffle (4) is mobile along the track reciprocal horizontal of X-axis guide rail unit (3) in the length direction of storage powder tank (5).
2. the preset powder supply mechanism of more material laser selective melting powder subregions according to claim 1, it is characterised in that: should
Two Y-axis guide rail units (1,2) being placed in parallel, which are located at, forms indoor outside, which passes through in X-direction
Molding room, both ends are fixed on the sliding block of Y-axis guide rail unit (1,2)；It is adopted between the X-axis guide rail unit (3) and molding room
Symmetrically open up slat track grooved rail with the sealing of the organ cover of fold or on molding room two sidewalls, the two of X-axis guide rail unit (3)
End is across the slat track grooved rail.
3. the preset powder supply mechanism of more material laser selective melting powder subregions according to claim 2, it is characterised in that: point
The contact position of area's baffle (4) and storage powder tank (5) is equipped with sealing strip；The shape of subregion baffle (4) and the inner section shape of storage powder tank (5)
Shape is corresponding.
4. the preset powder supply mechanism of more material laser selective melting powder subregions according to claim 3, it is characterised in that: institute
State subregion baffle (4) quantity be one or more than one.
5. the preset powder supply mechanism of more material laser selective melting powder subregions according to claim 4, it is characterised in that: institute
Powdering item is stated for flexible powdering item, through bolt clamping on linking strip (6).
6. the preset powder supply mechanism of more material laser selective melting powder subregions according to claim 5, it is characterised in that: institute
Pressure pin (7) is stated to be fixed by screws on the sliding block of X-axis guide rail unit (3).
7. a kind of laying method of the X-direction tiling various material powder in the same bisque, it is characterised in that including walking as follows
It is rapid:
Two axis two linkage mobile platform is started to work, i.e. its sliding block of the motor control of Y-axis guide rail unit (1,2) moves up in the Y direction
It is dynamic, and storage powder tank (5) and X-axis guide rail unit (3) is driven to be moved to the non-processing region of platform with the sliding block of Y-axis；X-axis guide rail list
Its sliding block X-direction of motor control of first (3) is mobile, and position of the control partition baffle (4) in storage powder tank (5), subregion is kept off at this time
Plate (4) storage powder tank (5) in stop place be in X-direction unlike material powder in the boundary of the X-direction of the same bisque
The position of line；Storage again by the powder of two kinds of unlike materials, with subregion baffle (4) for boundary, at left and right sides of loading subregion baffle (4)
In powder area；
After powder packing, powdering process is initially entered, its sliding block Y-direction of the motor control of Y-axis guide rail unit (1,2) is moved
It is dynamic, drive storage powder tank (5) to move in the Y-direction of the machining area of platform, the simultaneously motor control of X-axis guide rail unit (3)
It is mobile to make its sliding block X-direction, subregion baffle (4) is driven to slide in X direction in storage powder tank (5)；
Powder tank (5) are stored up after the machining area of platform is back to non-processing region, complete a powdering stroke；Storage powder tank (5) exists
It is back to by machining area in the stroke in non-processing region, flexible powdering item is by the powder of unlike material with subregion baffle
(4) it is boundary, strikes off on the platform of machining area, forms the powder bed comprising various material；Realize in a powdering
The powder of unlike material is laid in X-direction in stroke under different Y coordinates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107901.5A CN109047764A (en) | 2018-09-21 | 2018-09-21 | A kind of powder supply mechanism and method that more material laser selective melting powder subregions are preset |
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| CN201811107901.5A CN109047764A (en) | 2018-09-21 | 2018-09-21 | A kind of powder supply mechanism and method that more material laser selective melting powder subregions are preset |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207290A (en) * | 2020-11-10 | 2021-01-12 | 上海工程技术大学 | Screw type multi-material powder supply device for selective laser melting process |
| CN113927048A (en) * | 2021-09-16 | 2022-01-14 | 首都航天机械有限公司 | Selective powder laying device for selective laser melting and forming of large thin-walled part |
| CN115229215A (en) * | 2022-07-27 | 2022-10-25 | 南京中科煜宸激光技术有限公司 | Apparatus and method for additive manufacturing of gradient material |
| CN116587600A (en) * | 2023-04-12 | 2023-08-15 | 韶关学院 | Multi-material 3D printer and printing method thereof |
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