CN111266579A

CN111266579A - Full-automatic selective laser melting continuous synthesis equipment and method

Info

Publication number: CN111266579A
Application number: CN202010115570.0A
Authority: CN
Inventors: 陈立东; 邢云飞; 刘睿恒; 柏胜强; 王超
Original assignee: Shanghai Institute of Ceramics of CAS
Current assignee: Shanghai Institute of Ceramics of CAS
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-06-12

Abstract

The invention discloses a full-automatic selective laser melting continuous synthesis device and a method, wherein the device comprises: a mold for supporting the raw material powder; a mechanical control unit for supplying raw material powder to the mold, carrying the mold, and collecting a finished product as a reaction product; a reaction vessel housing a mold; a laser unit for irradiating a raw material powder in a mold in a reaction vessel with laser light to promote a synthesis reaction, the laser unit comprising: the laser numerical control device is provided with a laser head and a laser numerical control device for carrying and moving the laser head; an operation chamber for placing the mechanical control unit and the laser head; and a vacuum unit for evacuating the process chamber and/or evacuating the reaction vessel and/or providing an inert atmosphere. The invention can realize the batch, high-efficiency and quick full-automatic selective laser melting continuous synthesis of materials.

Description

Full-automatic selective laser melting continuous synthesis equipment and method

Technical Field

The invention relates to the field of material synthesis and mechanical automation, in particular to full-automatic selective laser melting continuous synthesis equipment and method.

Background

Selective Laser Melting (SLM) technology is a new additive manufacturing technology that emerged in the mid 90's of the 20 th century. The technology can directly manufacture metal parts with complex shapes, good mechanical properties, high density, high precision and density of nearly 100 percent.

The selective laser melting technology is a complex physical metallurgy process, and the formation process of the selective laser melting technology designs a plurality of physical phenomena, including absorption and transmission of laser energy, heat convection of materials and the outside, a heat transfer process between powder particles, evolution of microstructures, melting and gasification of materials, chemical reaction and the like. Most of the compound materials can be melted under the irradiation of high-energy laser beams, thereby promoting the occurrence of synthesis reaction.

In addition, the present applicant has invented a skutterudite material by using a fast-moving high-energy laser beam of a selective laser melting technique, and for example, patent document 1 discloses a method for efficiently producing a skutterudite thermoelectric material by using a laser, which comprises placing a raw material powder in a graphite mold, melting the raw material powder by using a laser, condensing the molten raw material powder to obtain an ingot, grinding the ingot into a powder, and sintering the powder by discharge plasma to obtain the skutterudite thermoelectric material. The method has the advantages of rapid preparation and uniform components.

Intelligent manufacturing and industrial innovation are new research hotspots and development directions in the industry at present, and the method and the related equipment described in patent document 1 cannot be used for rapid continuous production of material batch, so there is still room for improvement to realize high-batch and high-efficiency laser melting continuous synthesis.

Therefore, no selective laser melting synthesis equipment specially aiming at mass production exists in the market at present, and particularly, rapid continuous production with high material batch and automation degree cannot be carried out.

Prior art documents:

patent documents:

patent document 1: chinese patent publication CN 106191522A.

Disclosure of Invention

The problems to be solved by the invention are as follows:

in view of the above problems, the present invention provides a full-automatic selective laser melting continuous synthesis apparatus and method capable of realizing rapid full-automatic continuous production of materials.

The technical means for solving the problems are as follows:

the invention provides a full-automatic selective laser melting continuous synthesis device, which comprises: a mold for supporting the raw material powder; a mechanical control unit that supplies the raw material powder to the mold, carries the mold, and collects a finished product as a reaction product; a reaction vessel housing the mold; a laser unit that irradiates the raw material powder in the mold in the reaction vessel with laser light to cause a synthesis reaction, the laser unit including: the laser numerical control device comprises a laser head, a laser device and a laser numerical control device, wherein the laser head is used for adjusting laser parameters; an operation chamber for placing the mechanical control unit and the laser head; and a vacuum unit for evacuating the process chamber and/or evacuating the reaction vessel and/or providing an inert atmosphere.

The invention realizes the synthesis of materials by using a selective laser melting technology, and simultaneously realizes the full-automatic continuous synthesis of materials by assisting a mechanical control unit. According to the invention, the selective laser melting and automation units are combined into one device, and the steps of raw material supply, mold carrying, laser melting synthesis, finished product collection and the like are combined into a whole, so that the technological process of laser melting synthesis is simplified, and the continuous synthesis of laser melting with high automation degree and low labor cost is realized. Moreover, the raw material powder is in an anaerobic environment for a long time, so that the contact between the raw material and the finished product material and the air can be greatly reduced, the anaerobic reaction environment with high vacuum or inert atmosphere is provided for the synthetic reaction, and the oxidation problem of the material with active chemical properties can be avoided. In addition, by using laser as the energy source of the reaction, the raw materials do not need to be directly contacted, thereby avoiding the cross contamination of the materials.

In the invention, the mold is a graphite mold and is provided with a paving channel.

Preferably, the powder body further comprises a material paving device, and the mechanical control unit drives the material paving device to pave the raw material powder body. Therefore, the raw materials can be automatically and continuously paved in vacuum or inert atmosphere without manual powder paving.

In the present invention, the reaction vessel may have: the container cover can be opened and closed, and the reaction chamber and the base for accommodating the die are arranged on the container cover; the container cover comprises an upper cover plate, transparent high-temperature glass and a lower cover plate which are sequentially arranged from top to bottom; the base is made of a material with excellent heat conduction performance, and is preferably made of pure copper. Therefore, the synthesis reaction can be ensured to be carried out in the oxygen-free environment of high vacuum or inert atmosphere isolated from the outside.

The molding apparatus may further include a conveying device for conveying the mold.

In the present invention, the laser may be one of a gas laser, a solid-state laser, a liquid laser, and a semiconductor laser, and is preferably a semiconductor laser.

In the present invention, the apparatus may further include a transition chamber configured to supply the raw material powder to the mechanical control unit; and a collection chamber for storing and discharging the finished product. Therefore, the transition cabin and the collecting cavity can be separated, and only the transition cavity needs to be exhausted when raw materials are supplied and finished products are taken out, so that the vacuum atmosphere of the operation chamber is not changed.

In the present invention, the apparatus may further include a reaction vessel cooling unit that cools the reaction vessel and/or a laser cooling unit that cools the laser unit; preferably, the reaction vessel cooling unit includes a water-cooled tube provided on a base of the reaction vessel. The cooling unit cools the reaction vessel and the laser unit, and can accelerate the cooling speed of the synthesized graphite mold and simultaneously enable the laser unit to stably work within a controllable temperature range, so that the production efficiency is improved, and continuous and long-time stable production becomes possible.

In the present invention, the machine control unit may have a robot arm.

In the present invention, at least one transition compartment for allowing tools for maintenance and testing to enter and exit may be further provided.

The invention also provides a method for carrying out full-automatic selective laser melting continuous synthesis according to the full-automatic selective laser melting continuous synthesis equipment, which comprises the following steps:

1) preparing raw material powder;

2) supplying the raw material powder to the mold by the mechanical control unit;

3) putting the mould into the reaction container, closing the container cover, and enabling the reaction container to be in vacuum or inert atmosphere;

4) setting a laser path and technological parameters, heating the raw material powder by adopting the laser melting technology, and moving along with the light spot to melt the selected laser area;

5) and opening the container cover, taking out the mold, and collecting the prepared finished product.

Further, the above steps 2) to 5) may be repeated to perform the laser melting continuous synthesis.

Specifically, the process parameters of the laser melting technology include: the diameter of a light spot is 0.1 mm-3 mm, the current is 80A-150A, the pulse width of the laser is 1 ms-5 ms, the speed of the light spot is 50 mm/min-500 mm/min, and the frequency of the laser is 5 Hz-50 Hz. The parameters can adapt to the synthesis conditions of most compounds, and meanwhile, the light spots have higher moving speed, so that the volatilization of low-melting-point components in the synthesis process can be reduced to the greatest extent.

The raw material powder may be a powder of a simple substance raw material. The present invention can be used to synthesize all metal compounds as well as most other compounds.

The invention has the following effects:

the invention can realize the batch, high-efficiency and quick full-automatic selective laser melting continuous synthesis of materials, simplifies and integrates a series of laser melting synthetic process flows from feeding to discharging of finished products, and also provides a full-automatic continuous production platform for the laser melting technology.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a fully automatic selective laser melting continuous synthesis apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a paving die in the full-automatic selective laser melting continuous synthesis apparatus shown in FIG. 1, wherein (a) is a top view of the paving die, and (b) is a sectional view A-A of the paving die;

FIG. 3 is a schematic structural view of a reaction vessel in the full-automatic selective laser melting continuous synthesis apparatus shown in FIG. 1, wherein (a) is a top view of the assembled reaction vessel and (b) is an exploded view of the reaction vessel;

description of the symbols:

1. 2, a power supply; 3. a transition chamber; 4. a mechanical arm; 5. spreading a material mould; 6. a laser head; 7. a laser numerical control device; 8. 9, a transition bin; 10. a laser; 11. a vacuum pump; 12. a reaction vessel; 13. a vacuum pump; 14. a control cabinet; 15. spreading brushes; 16. a material paving channel; 17. a container cover; 18. an upper cover plate; 19. glass; 20. a lower cover plate; 21. a reaction chamber; 22. a water-cooled tube; 23. a base.

Detailed Description

The present invention is further described below in conjunction with the following embodiments and the accompanying drawings, it being understood that the drawings and the following embodiments are illustrative of the invention only and are not limiting thereof.

Disclosed herein is a full-automatic selective laser melting continuous synthesis apparatus (selective laser melting continuous synthesis apparatus for short) capable of realizing rapid full-automatic continuous production of materials. FIG. 1 is a schematic diagram showing the overall structure of a selective laser melting continuous synthesis apparatus according to an embodiment of the present invention.

As shown in fig. 1, the selective laser melting continuous synthesis apparatus of the present embodiment includes: a spreading mould 5, a mechanical control unit, a reaction vessel 12, a laser unit, a vacuum unit and a cooling unit. The paving mould 5 mainly functions as a carrier of raw material powder, and can be a graphite mould. The spreader die 5 may be placed on a base. The mechanical control unit mainly functions to supply the raw material powder to the placement die 5, carry or replace the placement die 5, and collect a finished product as a reaction product. The reaction vessel 12 is mainly used for placing the placement mold 5 and providing a reaction area of vacuum or inert atmosphere to the placement mold 5. The laser unit irradiates a laser beam to the raw material powder in the paving die 5, and mainly functions to melt the raw material powder to perform a synthesis reaction. The vacuum unit mainly functions to evacuate the reaction vessel 12 or provide an inert atmosphere, and to maintain the mechanical control unit and the laser unit in a vacuum environment. The cooling unit is used for cooling the reaction vessel 12 and the laser unit. In addition, the power supplies 1, 2 may be used to power the mechanical control unit and the laser unit, respectively.

The machine control unit includes a robot arm 4. The robot arm 4 can supply the raw material powder to the paving die 5 by changing the end tool, carry or change the paving die 5, and collect the finished product as the reaction product. The selective laser melting continuous synthesis equipment of the embodiment also comprises a transition cavity 3 and a collection cavity. The transition chamber 3 is connected with the outside. A sufficient amount of raw material powder is charged into the transition chamber 3 manually from the outside or automatically by a charging device, and the raw material powder is supplied from the transition chamber 3 to the robot arm 4 by a supply mechanism. The feeding mechanism may be, for example, a feeding belt. The collecting cavity is connected with the outside and used for storing and discharging finished products. In particular, the mechanical arm 4 may take the paving moulds 5 out of the reaction vessel 12 after preparation, and transport the paving moulds 5 to a collection chamber for pouring to pour out the finished products. After the collection chamber is filled, the finished product is transferred to the outside through the collection chamber.

As shown in fig. 1, the present embodiment further includes a conveyor belt for conveying the paving molds 5, and a plurality of paving molds 5 (three paving molds in the present embodiment) can be placed on the conveyor belt. Each time the mechanical arm 4 takes one spreading mold 5 from the foremost end of the conveyor belt, the conveyor belt advances once to convey the spreading mold 5 to a predetermined position waiting for the mechanical arm to carry. After the finished product has been poured, the robot arm 4 carries the empty spreading mould 5 to the very end of the conveyor. The movement path setting and control of the robot arm and the control of the conveyor belt are mainly realized by the control cabinet 14.

Fig. 2 is a schematic structural diagram of a spreading mold in the full-automatic selective laser melting continuous synthesis equipment shown in fig. 1. As shown in fig. 2, the paving die 5 is provided with a paving channel 16. The paving channel 16 can be in any shape and can be adjusted according to the requirements of different target products. And as shown in fig. 2 (b), the paving passage 16 is a passage formed by recessing downward from the bottom surface of the paving mold 5. The two sides of the paving mould 5 can be provided with paving brushes 15 which can be pulled by a mechanical arm through an actuating mechanism (such as a spring and the like), so that the raw material powder is ensured to be paved on a paving channel 16.

Specifically, the raw material powder is supplied to the raw material chamber of the robot arm 4 through the transition chamber 3. In the present embodiment, for example, the robot arm 4 may add the raw powder to the placement die 5 by changing the end tool to a feed hopper or the like, and flatten the raw powder in the die by the lower edge of the feed hopper. The mechanical arm 4 pulls the spreading brushes 15 on both sides of the spreading mold 5 by using a tail end tool with a grabbing function to remove the excessive raw material powder. The spreading brush 15 may be other types of spreading devices, such as a tool at the end of the mechanical arm 4, a pick or a scraper held and driven by the mechanical arm 4, as long as the spreading brush can spread and remove the excess raw material powder.

Subsequently, the robot arm 4 conveys the bed mold 5 on which the raw material powder is loaded to the reaction vessel 12. After the reaction is completed, the robot arm 4 takes out the cooled placement mold 5 from the reaction vessel 12 and collects and stores the finished product as a reaction product into a collection chamber.

The laser unit includes a laser 10 having a laser head 6 and a laser numerical control device 7. The laser 10 can adjust the parameters of the laser to emit a laser beam of desired parameters from the laser head 6. The laser head 6 is mounted on the laser numerical control device 7 and moves along a three-dimensional coordinate under the driving of the laser numerical control device 7, wherein the movement on the x axis and the y axis is used for enabling the laser head 6 to move along the paving channel 16, and the movement on the z axis is used for regulating and controlling the focusing point of the laser, so that the material can be synthesized along the track of the paving channel 16 of the paving mould 5. The laser numerical control device 7 may be a mechanism that can precisely move the laser head in three-dimensional coordinates, and may be, for example, a robot, a parallel arm, a rectangular gantry, or the like.

The laser 10 is one of a gas laser, a solid laser, a liquid laser, and a semiconductor laser, and is preferably a semiconductor laser.

The vacuum unit includes vacuum chambers and

vacuum pumps

11, 13. The robot arm 4 and the laser head 6 are placed in a vacuum operating room. The operator's compartment may be a laboratory glove box. The water oxygen concentration in the process chamber may be less than 10 ppm. Specifically, in the present embodiment, a vacuum operation chamber is provided with a robot arm 4, a laser head 6, and a laser numerical control device 7. The vacuum pump 11 mainly functions to evacuate a reaction chamber 21 in the reaction vessel 12 described later or to provide an inert atmosphere, and the vacuum pump 13 mainly functions to evacuate a vacuum chamber in response to a vacuum environment of the glove box as a whole. The vacuum degree of the reaction chamber 21 in the present invention may be less than 10pa, and the inert gas may be argon, nitrogen, helium, or the like. Therefore, the raw material powder is in an anaerobic environment for a long time, so that the contact between the raw material and the finished product material and the air can be greatly reduced, the anaerobic reaction environment of high vacuum or inert atmosphere is provided for the synthetic reaction, and the oxidation problem of rare earth and other materials with active chemical properties can be avoided.

FIG. 3 is a schematic structural diagram of a reaction vessel in the full-automatic selective laser melting continuous synthesis apparatus shown in FIG. 1. The reaction vessel 12 has an openable and closable vessel lid 17, a reaction chamber 21, and a base 23. The container cover 17 is composed of an upper cover plate 18, transparent high-temperature glass 19 and a lower cover plate 20, the upper cover plate and the lower cover plate are mainly used for providing a sealed environment, the transparent high-temperature glass provides a light path transmission path for laser transmission, and the laser energy is large, so that the container cover needs to be made of high-temperature-resistant glass. After the arm 4 conveys the bed mold 5 loaded with the raw material powder to the reaction vessel 12, the vessel cover 17 rotates a ball valve communicating with a vacuum pump to a closed state to make the reaction vessel 12 airtight. After the reaction is complete, the cover 17 is rotated open for the robot arm 4 to remove the placement die 5. The reaction chamber 21 is used for accommodating the paving die 5, and after the container cover 17 is closed, the vacuum pump 11 vacuumizes the reaction chamber 21 or keeps inert gas flowing in the reaction chamber 21. Thus, the raw material powder can be effectively prevented from being oxidized in a high-temperature environment. The base 23 may be made of a material having excellent heat conductivity, such as copper, nickel, iron, or a carbon material having high heat conductivity, and is preferably made of pure copper.

Further, the cooling unit includes a reaction vessel cooling unit that cools the reaction vessel 12 and/or a laser cooling unit that cools the laser unit. The reaction vessel cooling unit includes water-cooled tubes 22 provided on a base 23. Cooling water flows in the water-cooling pipe 22 and is kept to circulate all the time, so that the heat conductivity of the metal base is further improved, the fused powder is rapidly cooled, the synthesis period is shortened, and the synthesis efficiency is improved. The laser cooling unit mainly includes a laser head cooling device and a laser pump cooling device which are cooled by circulating water, thereby stably operating for a long time by water cooling.

In the present embodiment, the raw material powder is a powder of a single material, and is a material according to a synthesis target, for example, common thermoelectric material skutterudite CoSb₃And the like, weighing and mixing the powders of the simple substance raw materials. Can be used to synthesize all metal compounds and most other compounds.

In the present embodiment, a transition cabin used for maintenance is further provided. As shown in figure 1, the larger transition cabin 9 is used when large articles such as laser heads, mechanical arms and the like need to be maintained in and out, and the smaller transition cabin 8 is mainly used for accessing some small maintenance tools and small testing tools.

According to the above full-automatic selective laser melting continuous synthesis apparatus, the present invention also provides a full-automatic selective laser melting continuous synthesis method, which comprises the following steps:

1) preparing raw material powder. Specifically, the powder of the raw material can be weighed as the raw material powder according to the chemical formula of the target product and uniformly mixed;

2) the robot arm 4 supplies the raw material powder to the spreading mold 5. Further, the spreading brush 15 may be pulled to spread the raw material powder. Specifically, in the apparatus adopting the embodiment shown in fig. 1, the transition chamber 3 may be opened to add the raw material powder to the robot arm 4;

3) the spreading mold 5 with the raw material powder spread flat is placed in the reaction vessel 12, and the vessel cover 17 is closed. Driving a vacuum pump to make the reaction vessel 12 be in vacuum or inert atmosphere;

4) setting laser path and technological parameters, heating the raw material powder by adopting a laser melting technology, and moving along with the light spot to melt the selected laser area. Specifically, the process parameters of the laser melting technique may include: the diameter of a light spot is 0.1 mm-3 mm, the current is 80A-150A, the pulse width of the laser is 1 ms-5 ms, the speed of the light spot is 50 mm/min-500 mm/min, and the frequency of the laser is 5 Hz-50 Hz;

5) the container cover 17 is opened, the cooled spreading mold 5 is taken out, and the prepared finished product is collected. Further, the finished product may be stored in a collection chamber;

subsequently, the steps 5) to 5) may also be repeated to perform the laser melting continuous synthesis. After the synthesized material is collected in the collecting cavity, the spreading mould 5 can be put into use again.

Further, after a certain amount is collected, the finished product can be taken out through the collection chamber, and the raw material powder can be added through the transition chamber 3.

The full-automatic selective laser melting continuous synthesis equipment and method can realize full-automatic continuous synthesis. The full-automatic selective laser melting continuous synthesis equipment and the method are used for but not limited to the production and preparation of skutterudite thermoelectric materials, and can be suitable for all thermoelectric materials which can not realize self-propagating reaction. Can also be used for the production and preparation of other semiconductor compounds and alloy materials.

According to the invention, the selective laser melting and automation unit is combined into one device, so that the technological process of laser melting synthesis is simplified, and the laser melting continuous synthesis with high automation degree and low labor cost is realized. And laser is used as energy for reaction, the raw materials are in an anaerobic environment for a long time, and the anaerobic reaction environment with high vacuum or inert atmosphere is provided for the synthesis reaction, so that the cross contamination of the materials is avoided, and the oxidation problem of the materials is also avoided. The cooling unit is used for cooling the reaction vessel and the laser unit, so that the equipment structure is simplified, the production efficiency is improved, and continuous and long-time stable production becomes possible. The invention realizes the batch, high-efficiency and quick full-automatic selective laser melting continuous synthesis of materials, simplifies and integrates a series of laser melting synthetic process flows from feeding to discharging of finished products, and provides a full-automatic continuous production platform for the laser melting technology.

The following examples are further illustrative to illustrate the present invention in detail. It should also be understood that the following examples are intended to further illustrate the present invention and should not be construed as limiting the scope of the invention.

(example 1)

The selective laser melting continuous synthesis equipment structure is shown in figure 1 and comprises a spreading mold 5, a mechanical control unit, a reaction vessel 12, a laser unit, a vacuum unit and a cooling unit.

(1) Raw material powder for synthesizing skutterudite was weighed and mixed uniformly according to the chemical formula of skutterudite (CoSb 3), and the raw material powder was supplied to the robot arm 4 through the transition chamber 3.

(2) And turning on the power supplies 1 and 2 and ensuring that the mechanical control unit, the laser unit and the cooling unit work normally.

(3) The mechanical arm 4 adds raw material powder to the paving mould 5 and pulls the paving brushes 15 on two sides of the paving mould 5. The spreading brush 15 spreads the raw material powder under the pulling of the robot arm 4, and removes the excess raw material powder.

(4) The robot arm 4 conveys the bed mold 5 loaded with the raw material powder to the reaction vessel 12. The container lid 17 is closed and the vacuum pump 11 circulates an inert gas through the reaction chamber 13.

(5) Setting the laser path as a pattern along the paving channel 15, setting the laser process parameters: in one embodiment, the laser spot diameter is 1 mm, the current is 95 amps, the laser pulse width is 3.2 ms, the spot movement rate is 120 mm/min, and the frequency is 19 hz. Laser beams with set parameters are emitted by the laser head 6, the laser head 6 is moved by the laser numerical control device 7 to move according to the laid pattern of the powder in the paving mould 5, and the laser selection area is fused along with the movement of the light spots.

(6) After the reaction is completed, the spreading mold 5 is cooled by cooling water flowing through the water-cooling pipe 22. After the placement die 5 is cooled, the lid 17 of the container is opened, the cooled placement die 5 is removed from the reaction vessel 12 by the robot arm 4, and the finished product as a reaction product is collected and stored in a collection chamber.

(7) And further repeating the steps of powder paving, loading of the paving mould 5, closing of the container cover 17, introduction of inert atmosphere, selective laser melting reaction, opening of the container cover 17, taking out of the paving mould 5 and collection of the reacted sample to realize full-automatic continuous production.

The above embodiments are intended to illustrate and not to limit the scope of the invention, which is defined by the claims, but rather by the claims, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A full-automatic selective laser melting continuous synthesis device is characterized by comprising:

a mold for supporting the raw material powder;

a mechanical control unit that supplies the raw material powder to the mold, carries the mold, and collects a finished product as a reaction product;

a reaction vessel housing the mold;

a laser unit that irradiates the raw material powder in the mold in the reaction vessel with laser light to cause a synthesis reaction, the laser unit including: the laser numerical control device comprises a laser head, a laser device and a laser numerical control device, wherein the laser head is used for adjusting laser parameters;

an operation chamber for placing the mechanical control unit and the laser head; and

a vacuum unit for evacuating the process chamber and/or evacuating the reaction vessel and/or providing an inert atmosphere.

2. The full-automatic selective laser melting continuous synthesis apparatus according to claim 1,

the mould is a graphite mould and is provided with a paving channel.

3. The full-automatic selective laser melting continuous synthesis apparatus according to claim 2,

the mechanical control unit drives the spreading device to spread the raw material powder.

4. The full-automatic selective laser melting continuous synthesis apparatus according to any one of claims 1 to 3,

the reaction vessel has: the container cover can be opened and closed, and the reaction chamber and the base for accommodating the die are arranged on the container cover; the container cover comprises an upper cover plate, transparent high-temperature glass and a lower cover plate which are sequentially arranged from top to bottom; the base is constructed of a thermally conductive material, preferably pure copper.

5. The full-automatic selective laser melting continuous synthesis apparatus according to any one of claims 1 to 4,

also comprises a conveying device for conveying the die.

6. The full-automatic selective laser melting continuous synthesis apparatus according to any one of claims 1 to 5,

the device also comprises a reaction vessel cooling unit for cooling the reaction vessel and/or a laser cooling unit for cooling the laser unit; preferably, the reaction vessel cooling unit includes a water-cooled tube provided on a base of the reaction vessel.

7. The full-automatic selective laser melting continuous synthesis apparatus according to any one of claims 1 to 6,

the machine control unit has a robot arm.

8. The full-automatic selective laser melting continuous synthesis apparatus according to any one of claims 1 to 7,

the transition cavity is used for supplying the raw material powder to the mechanical control unit; and a collection chamber for storing and discharging the finished product;

preferably, the system further comprises at least one transition bin for allowing tools for maintenance and test to enter and exit.

9. A method for continuous synthesis using fully automatic selective laser melting according to any one of claims 1 to 8, characterized in that it comprises the following steps:

1) preparing raw material powder;

10. The full-automatic selective laser melting continuous synthesis method according to claim 9,

the technological parameters of the laser melting technology comprise: the diameter of a light spot is 0.1 mm-3 mm, the current is 80A-150A, the pulse width of the laser is 1 ms-5 ms, the speed of the light spot is 50 mm/min-500 mm/min, and the frequency of the laser is 5 Hz-50 Hz.