阅读说明：本技术 适用于同步辐射光源的小型选区激光熔化增材装置 (Small selective laser melting material increasing device suitable for synchrotron radiation light source ) 是由 杜大帆 董安平 孙宝德 何林 祝国梁 雷力明 于 2021-08-19 设计创作，主要内容包括：本发明提供了一种适用于同步辐射光源的小型选区激光熔化增材装置,涉及增材制造的技术领域。适用于同步辐射光源的小型选区激光熔化增材装置包括框架、激光器和转动组件；框架设置设置有工作平台,工作平台上设置有铺粉件、粉末储存仓、粉末回收仓、打印平台和用于驱动打印平台移动的传动件,激光器设置在框架的顶部,且激光器与打印平台对应；粉末储存仓和粉末回收仓分别设置在打印平台的两侧,且铺粉件设置在粉末储存仓的一侧,以使铺粉件能够将粉末储存仓排出的粉末推至打印平台上；转动组件与框架连接,以使转动组件带动框架转动。达到了便于研究人员使用的技术效果。(The invention provides a small selective laser melting additive device suitable for a synchrotron radiation light source, and relates to the technical field of additive manufacturing. The small selective laser melting additive device suitable for the synchrotron radiation light source comprises a frame, a laser and a rotating assembly; the frame is provided with a working platform, the working platform is provided with a powder spreading part, a powder storage bin, a powder recovery bin, a printing platform and a transmission part for driving the printing platform to move, the laser is arranged at the top of the frame and corresponds to the printing platform; the powder storage bin and the powder recovery bin are respectively arranged on two sides of the printing platform, and the powder spreading piece is arranged on one side of the powder storage bin so that the powder spreading piece can push the powder discharged from the powder storage bin onto the printing platform; the rotating assembly is connected with the frame so that the rotating assembly drives the frame to rotate. The technical effect of convenient use of researchers is achieved.)

1. A compact selective laser melting additive apparatus adapted for use with a synchrotron radiation source, comprising: a frame (100), a laser (200) and a rotating assembly (300);

the frame (100) is provided with a working platform (110), the working platform (110) is provided with a powder laying part (120), a powder storage bin (130), a powder recovery bin (140), a printing platform (150) and a transmission part (160) for driving the printing platform (150) to move, the laser (200) is arranged at the top of the frame (100), and the laser (200) corresponds to the printing platform (150);

the powder storage bin (130) and the powder recovery bin (140) are respectively arranged at two sides of the printing platform (150), and the powder spreading piece (120) is arranged at one side of the powder storage bin (130) so that the powder spreading piece (120) can push the powder discharged from the powder storage bin (130) onto the printing platform (150);

the rotating assembly (300) is connected with the frame (100) so that the rotating assembly (300) drives the frame (100) to rotate.

2. The compact, selective laser melting additive apparatus for synchrotron radiation light sources of claim 1 wherein said rotating assembly (300) comprises a rotating member (310), a rotating base (320), and a rotating shaft (330);

the rotating part (310) is arranged on the rotating seat (320), the frame (100) is positioned in the rotating seat (320), and the output end of the rotating part (310) is connected with one side of the frame (100) through the rotating shaft rod (330), so that the rotating part (310) can drive the frame (100) to rotate.

3. The compact, selective laser melting additive device for synchrotron radiation light sources as claimed in claim 2, wherein said other side of said frame (100) is connected to said rotating base (320) through said rotating shaft (330), said rotating shaft (330) being pivotally connected to said rotating base (320).

4. The compact, selective laser melting additive apparatus for synchrotron radiation light sources of claim 3 wherein said rotating member (310) is a motor.

5. The compact, selective laser melting additive apparatus for a synchrotron radiation light source of claim 1 wherein said printing platform (150) has disposed thereon a first modular assembly comprising a first fixture (510), a first stainless steel substrate (520), and two graphite sheets (530);

the first stainless steel substrate (520) is disposed on the first fixture (510);

two of the graphite sheets (530) are disposed on the first stainless steel substrate (520);

the first fixing element (510) is connected to the transmission element (160).

6. A small, selective laser melting additive device suitable for use in a source of synchrotron radiation as in claim 5, wherein the distance between two of said graphite sheets (530) is 200 μm, and the width of said graphite sheets (530) is 10 mm.

7. The small-sized selective laser melting additive device suitable for the synchrotron radiation light source of claim 5, further comprising a first X-ray light source for emitting X-ray white light, a YAG crystal for reflecting a signal, and an X-ray imaging high-speed detector for receiving the signal;

the first X-ray light source and the YAG crystal are respectively arranged on two sides of the printing platform (150).

8. The compact, selective laser melting additive apparatus for a synchrotron radiation light source of claim 1 wherein said printing platform (150) has a second module assembly disposed thereon, said second module assembly comprising a second fixture (610) and a second stainless steel substrate (620);

the second stainless steel substrate (620) is disposed on the second fixture (610);

the second fixing part (610) is connected with the transmission part (160).

9. The compact selective laser melting additive device suitable for synchrotron radiation light sources of claim 8, further comprising a second X-ray source for emitting X-ray monochromatic light and an X-ray diffraction high frequency surface detector for receiving signals;

the second X-ray light source and the X-ray diffraction high-frequency surface detector are respectively positioned at two sides of the printing platform (150).

10. The compact, selective laser melting additive device for synchrotron radiation light sources of any of claims 1-9, wherein said transmission member (160) is a screw transmission structure.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to a small selective laser melting additive device suitable for a synchrotron radiation light source.

Background

And (3) selecting laser as an energy source for selective laser melting additive manufacturing, scanning layer by layer on a metal powder bed layer according to a planned path in the three-dimensional CAD slicing model, melting and solidifying the scanned metal powder to achieve the effect of metallurgical bonding, and finally obtaining the metal part designed by the model. The SLM (Selective laser melting) technology overcomes the difficulties associated with conventional techniques for manufacturing metal parts having complex shapes. It can directly form metal parts with almost full compactness and good mechanical properties.

The laser with high power density irradiates on the metal powder, the metal powder absorbs the laser energy and then is melted and vaporized rapidly to form a concave liquid molten pool, and the liquid molten pool moves downwards under the action of evaporation recoil pressure to form a metal vapor hole (keyhole). Because the liquid molten pool and the keyhole are surrounded by surrounding solid metal, the dynamic evolution mechanism of the molten pool and the keyhole under the laser irradiation is not clear, the flow characteristic in the molten pool is not clear, defects are easily introduced in the process, and the performance of parts is influenced. In addition, the rapid micro-melting bath fusing process involves a complex phase transformation process, and the high-temperature alloy additive manufacturing process forms a plurality of phase structures. The rapid fusing process related to the SLM additive manufacturing process does not have a good observation method and means at present, and research and development of the SLM additive manufacturing process are limited.

The Selective Laser Melting (SLM) process is mainly characterized in that the law of molten pool flowing, air holes and defect evolution is obviously changed through powder laying and selective melting and solidification by laser. The laser power is very high, the action process of laser and powder is more complex, the flow inside the molten pool is more violent and complex, the method belongs to a process of multi-physical-field coupling, and defects are easily introduced, so that the method is more critical to the observation of the flow details inside the molten pool. At present, for the observation of the defects, most of the methods use a sample method to watch a metallographic phase, dynamic observation cannot be carried out in an in-situ observation mode, the flow condition inside a molten pool can be observed, quantitative analysis cannot be carried out, or the condition inside the molten pool can be hardly observed by using a high-speed camera method.

In the prior art, the additive manufacturing special phenomena such as flow field and keyhole formation in a melting pool in the SLM process cannot be synchronously observed, and quantitative description cannot be carried out according to data.

Therefore, it is an important technical problem to be solved by those skilled in the art to provide a small selective laser melting additive device suitable for synchrotron radiation light source, which is convenient to use.

Disclosure of Invention

The invention aims to provide a small selective laser melting material increasing device suitable for a synchrotron radiation light source so as to relieve the technical problem of inconvenient use in the prior art.

In a first aspect, an embodiment of the present invention provides a small selective laser melting additive device suitable for a synchrotron radiation light source, including a frame, a laser, and a rotating assembly;

the frame is provided with a working platform, the working platform is provided with a powder spreading part, a powder storage bin, a powder recovery bin, a printing platform and a transmission part for driving the printing platform to move, the laser is arranged at the top of the frame and corresponds to the printing platform;

the powder storage bin and the powder recovery bin are respectively arranged on two sides of the printing platform, and the powder spreading piece is arranged on one side of the powder storage bin so that the powder spreading piece can push the powder discharged from the powder storage bin onto the printing platform;

the rotating assembly is connected with the frame, so that the rotating assembly drives the frame to rotate.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the rotating assembly includes a rotating element, a rotating seat, and a rotating shaft;

the rotating piece is arranged on the rotating seat, the frame is positioned in the rotating seat, and the output end of the rotating piece is connected with one side of the frame through the rotating shaft rod, so that the rotating piece can drive the frame to rotate.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the other side of the frame is connected to the rotating seat through the rotating shaft, and the rotating shaft is pivotally connected to the rotating seat.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the rotating member is a motor.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a first module fitting is disposed on the printing platform, and the first module fitting includes a first fixing member, a first stainless steel substrate, and two graphite sheets;

the first stainless steel substrate is arranged on the first fixing piece;

two of the graphite sheets are disposed on the first stainless steel substrate;

the first fixing piece is connected with the transmission piece.

In combination with the first aspect, the present invention provides a possible implementation manner of the first aspect, wherein the distance between the two graphite sheets is 200 μm, and the width of the graphite sheet is 10 mm.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the small-sized selective laser melting additive apparatus suitable for a synchrotron radiation light source further includes a first X-ray light source for emitting X-ray white light, a YAG crystal for reflecting a signal, and an X-ray imaging high-speed detector for receiving the signal;

the first X-ray light source and the YAG crystal are respectively arranged on two sides of the printing platform.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a second module part is disposed on the printing platform, and the second module part includes a second fixing member and a second stainless steel substrate;

the second stainless steel substrate is arranged on the second fixing piece;

the second fixing piece is connected with the transmission piece.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the small selective laser melting additive apparatus suitable for a synchrotron radiation light source further includes a second X-ray light source for emitting monochromatic X-ray light and an X-ray diffraction high-frequency surface probe for receiving a signal;

the second X-ray light source and the X-ray diffraction high-frequency surface detector are respectively positioned at two sides of the printing platform.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the transmission member is of a screw transmission structure.

Has the advantages that:

the embodiment of the invention provides a small selective laser melting material increasing device suitable for a synchrotron radiation light source, which comprises a frame, a laser and a rotating assembly, wherein the frame is provided with a plurality of light sources; the frame is provided with a working platform, the working platform is provided with a powder spreading part, a powder storage bin, a powder recovery bin, a printing platform and a transmission part for driving the printing platform to move, the laser is arranged at the top of the frame and corresponds to the printing platform; the powder storage bin and the powder recovery bin are respectively arranged on two sides of the printing platform, and the powder spreading piece is arranged on one side of the powder storage bin so that the powder spreading piece can push the powder discharged from the powder storage bin onto the printing platform; the rotating assembly is connected with the frame so that the rotating assembly drives the frame to rotate.

When the powder spreading machine works, printing powder is transferred to a working platform through a powder storage bin, then the printing powder is transferred to the printing platform through a powder spreading piece, then the laser works, then a transmission piece drives the printing platform to descend, then the powder spreading piece pushes redundant printing powder into a powder recovery bin, and then new printing powder is pushed to the printing platform. Moreover, through the arrangement, additive manufacturing special phenomena such as flow field and keyhole formation in a molten pool in the SLM process can be synchronously observed, and quantitative description can be carried out according to data; meanwhile, through the arrangement of the rotating assembly, the inclination angle of the frame can be adjusted, the requirement of a synchrotron radiation diffraction line station is met, the complex phase change process of the additive manufacturing process is tracked in situ in real time, the understanding and the organization control of the high-temperature alloy additive manufacturing process are greatly improved, and the research and the development of additive manufacturing are developed. Thereby being convenient for scientific research personnel to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a small selected-area laser melting additive apparatus suitable for use in a synchrotron radiation light source according to an embodiment of the present invention;

FIG. 2 is a side view of a first mode of use of a compact selective laser melting additive apparatus suitable for use with a synchrotron radiation light source according to embodiments of the present invention;

FIG. 3 illustrates a first module assembly for a first mode of use of a compact selective laser melting additive apparatus for use with a synchrotron radiation light source in accordance with an embodiment of the present invention;

FIG. 4 is a side view of a second use of a compact selected area laser melting additive apparatus suitable for use with a synchrotron radiation light source according to embodiments of the present invention;

fig. 5 is a second module assembly for a second usage of a compact selective laser melting additive apparatus for a synchrotron radiation light source according to an embodiment of the present invention.

Icon:

100-a frame; 110-a working platform; 120-spreading powder; 130-powder storage; 140-powder recovery bin; 150-a printing platform; 160-a transmission;

200-a laser;

300-a rotating assembly; 310-a rotating member; 320-a rotating seat; 330-rotating shaft;

400-printing the sample;

510-a first fixture; 520-a first stainless steel substrate; 530-graphite flakes;

610-a second fixture; 620-second stainless steel substrate;

700-print powder.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Referring to fig. 1, the present embodiment provides a small selective laser melting additive apparatus suitable for a synchrotron radiation light source, which includes a frame 100, a laser 200, and a rotating assembly 300; the frame 100 is provided with a working platform 110, the working platform 110 is provided with a powder spreading part 120, a powder storage bin 130, a powder recovery bin 140, a printing platform 150 and a transmission part 160 for driving the printing platform 150 to move, the laser 200 is arranged at the top of the frame 100, and the laser 200 corresponds to the printing platform 150; the powder storage bin 130 and the powder recovery bin 140 are respectively arranged at two sides of the printing platform 150, and the powder spreading member 120 is arranged at one side of the powder storage bin 130, so that the powder spreading member 120 can push the powder discharged from the powder storage bin 130 onto the printing platform 150; the rotating assembly 300 is connected to the frame 100, so that the rotating assembly 300 drives the frame 100 to rotate.

In operation, the powder storage bin 130 transfers the printing powder 700 to the working platform 110, the powder spreading member 120 transfers the printing powder 700 to the printing platform 150, the laser 200 works, the transmission member 160 drives the printing platform 150 to descend, the powder spreading member 120 pushes the excess printing powder 700 into the powder recovery bin 140, and then the new printing powder 700 is pushed to the printing platform 150. Moreover, through the arrangement, additive manufacturing special phenomena such as flow field and keyhole formation in a molten pool in the SLM process can be synchronously observed, and quantitative description can be carried out according to data; meanwhile, through the arrangement of the rotating assembly 300, the inclination angle of the frame 100 can be adjusted, the requirement of a synchrotron radiation diffraction line station is met, the complex phase change process of the additive manufacturing process is tracked in situ in real time, the understanding and the organization control of the high-temperature alloy additive manufacturing process are greatly improved, and the research and the development of additive manufacturing are developed. Thereby being convenient for scientific research personnel to use.

Referring to fig. 1, in an alternative embodiment, the rotating assembly 300 includes a rotating member 310, a rotating base 320, and a rotating shaft 330; the rotation member 310 is disposed on the rotation base 320, the frame 100 is disposed in the rotation base 320, and an output end of the rotation member 310 is connected to one side of the frame 100 through the rotation shaft 330, so that the rotation member 310 can drive the frame 100 to rotate. The other side of the frame 100 is connected to the rotating base 320 through a rotating shaft 330, and the rotating shaft 330 is pivotally connected to the rotating base 320. The rotating member 310 may be a motor. The transmission member 160 adopts a screw transmission structure.

Wherein, after the frame 100 is rotated by the rotating assembly 300, the frame 100 can be rotated to the right by 15 degrees. In addition, a person skilled in the art can set the rotation angle of the frame 100 according to actual requirements.

Referring to fig. 2 and 3, in an alternative of this embodiment, a first module assembly is provided on the printing platform 150, the first module assembly comprising a first fixture 510, a first stainless steel substrate 520, and two graphite sheets 530; a first stainless steel substrate 520 is disposed on the first fixture 510; two graphite sheets 530 are disposed on the first stainless steel substrate 520; the first fixing member 510 is connected to the transmission member 160.

Referring to fig. 2 and 3, in an alternative to this embodiment, the distance between two graphite sheets 530 is 200 μm and the width of the graphite sheet 530 is 10 mm.

Referring to fig. 2 and 3, in an alternative of this embodiment, the small-sized selective laser melting additive device suitable for the synchrotron radiation light source further includes a first X-ray light source for emitting X-ray white light, a YAG crystal (yttrium aluminum garnet polycrystalline aluminum-yttrium garnet) for reflecting signals, and an X-ray imaging high-speed detector for receiving signals; the first X-ray light source and the YAG crystal are respectively disposed on both sides of the printing platform 150.

Specifically, the laser additive manufacturing area can be penetrated by X-ray white light, and different substances can absorb different X-rays, so that signals can be reflected by YAG crystals, and the micro-melting pool is subjected to rapid imaging in the melting process through an X-ray imaging high-speed detector, so that information such as melting in the micro-melting pool, formation of key holes and pores, a flow field in the melting pool, the surface appearance of the melting pool and the like is obtained, and the printing process principle analysis and process parameter optimization are performed according to the obtained information.

Specifically, the in-situ observation function of the selective laser melting additive manufacturing molten pool comprises the following steps:

step one, providing the small-sized selective laser melting material adding device suitable for the synchrotron radiation light source provided by the embodiment, setting process parameters to enable the device to work normally, selecting imaging module accessories on the printing platform 150, and paving alloy powder (printing powder 700) required to be researched in the module; step two, starting the X-ray imaging high-speed detector, and enabling the X-ray white light emitted by the first X-ray light source to be aligned to the printing sample 400 of the printing platform 150 to be observed; setting parameters and debugging equipment to enable the equipment to enter a working state; step three, starting the small selective laser melting additive device suitable for the synchrotron radiation light source provided by the embodiment, starting the additive manufacturing process, and printing the sample 400; and step four, after the sample is printed and the process is finished, closing the small selective laser melting material adding device suitable for the synchrotron radiation light source, closing the X-ray imaging high-speed detector, and processing data information by using image information acquired by the image display processing equipment. And step five, if the process parameters and the materials are changed, repeating the step two, the step three and the step four until the experiment is finished.

Referring to fig. 4 and 5, in an alternative embodiment, a second module assembly is disposed on the printing platform 150, and includes a second fixing member 610 and a second stainless steel substrate 620; a second stainless steel substrate 620 is disposed on the second mount 610; the second fixing member 610 is connected to the transmission member 160.

Referring to fig. 4 and 5, in an alternative of the present embodiment, the small selective laser melting additive device suitable for the synchrotron radiation light source further includes a second X-ray light source for emitting X-ray monochromatic light and an X-ray diffraction high-frequency surface detector for receiving a signal; the second X-ray source and the X-ray diffraction high frequency surface detector are respectively located at both sides of the printing platform 150.

Specifically, the whole device can be inclined through the rotating assembly 300, the observation requirement of a light source small-angle diffraction line station is met, the X-ray monochromatic light diffracts on the surface in the additive manufacturing printing process through the inclination of the angle, the formation of a reaction additive manufacturing fusing process phase can be implemented, the nucleation and phase change process can be captured through the X-ray diffraction high-frequency surface detection equipment, particularly the formation of a precipitated phase in a high-temperature alloy, and the research on a high-temperature alloy precipitated phase formation mechanism is facilitated.

Specifically, the phase change detection function of the selective laser melting additive manufacturing molten pool comprises the following steps:

step one, providing the small-sized selective laser melting material adding device suitable for the synchrotron radiation light source provided by the embodiment, setting process parameters to enable the device to work normally, selecting corresponding diffraction module accessories from alloy powder to be researched, and paving printing powder 700 in the module; step two, starting the X-ray observation equipment, and aligning the X-ray monochromatic light emitted by the second X-ray light source to the printing sample 400 on the printing platform 150 to be observed; setting parameters and debugging equipment to enable the equipment to enter a working state; step three, starting the small selective laser melting additive device suitable for the synchrotron radiation light source provided by the embodiment, starting the additive manufacturing process, and printing the sample 400; and step four, after the sample is printed and the process is finished, closing the small selective laser melting material adding device suitable for the synchrotron radiation light source, closing the X-ray observation equipment, and processing data information by using information collected by the high-frequency surface detection processing equipment. And step five, if the process parameters and the materials are changed, repeating the step two, the step three and the step four until the experiment is finished.

In summary, the small selective laser melting additive device suitable for the synchrotron radiation light source provided by this embodiment can realize molten pool observation and phase change mechanism research of the melting process of high-temperature alloy additive manufacturing and fusing process by changing the accessories and the tilting angle on one SLM laser additive device through the optimized micro SLM equipment. By in-situ real-time observation of the interior of a molten pool and the phase change process, understanding and development of SLM material additive manufacturing processes by scientific researchers are greatly met, and large-scale application of the SLM is facilitated.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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 or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.