CN115401218A

CN115401218A - Metal 3D printing device and metal 3D printing method

Info

Publication number: CN115401218A
Application number: CN202110580490.7A
Authority: CN
Inventors: 刘建业; 高文华; 徐卡里; 牛留辉; 胡高峰
Original assignee: Guangdong Hanbang3d Technology Co ltd
Current assignee: Guangdong Hanbang3d Technology Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-11-29

Abstract

The utility model provides a metal 3D printing device, includes the shaping platform, first shop's powder arm, second shop's powder arm, wind field mechanism and scanning module. The forming table is used for bearing powder. First shop's powder arm and second shop's powder arm interval set up to can move in order to spread the powder to the shaping platform respectively along being on a parallel with the shaping platform. The wind field mechanism includes the mouth of blowing and receives the wind mouth, and the mouth of blowing is located first shop powder arm and is blown to the forming table, receives the wind mouth and locates the second shop powder arm and inhale. The scanning module is used for emitting laser to the powder between the first powder spreading arm and the second powder spreading arm so as to enable the powder to be solidified to form a workpiece. Above-mentioned metal 3D printing device has realized the purpose of printing when spreading the powder. A metal 3D printing method can achieve the purposes of continuous powder laying and continuous printing, and further improves printing efficiency.

Description

Metal 3D printing device and metal 3D printing method

Technical Field

The application relates to a metal 3D printing device and a metal 3D printing method.

Background

At present, in the metal 3D printing manufacturing process, the mode of powder laying-printing-descending-powder laying is mostly adopted for carrying out layer-by-layer circular printing, specifically, a layer of metal powder is firstly laid on a platform through a powder laying pipe, after the powder is laid, the laid powder is solidified and molded at a required position through laser scanning, then the platform descends by the distance of a layer of powder so that the powder laying pipe can be laid with a layer of powder again, and the process is repeated until the printing and molding are carried out. Wherein, the dust that the powder condenses and forms in the printing department still needs to be absorbed in the printing process to prevent that the dust from influencing the shaping quality. However, the powder spreading and laser printing can not be carried out simultaneously, and printing is carried out after the powder spreading is finished every time, so that the problem of low printing efficiency is caused, and the time is more prominent particularly in large-size metal 3D printing.

Disclosure of Invention

In view of the above, it is desirable to provide a metal 3D printing apparatus and a metal 3D printing method capable of improving printing efficiency.

An embodiment of the application provides a metal 3D printing device, including forming table, first shop's powder arm, the powder arm is spread to the second, wind field mechanism and scanning module. The forming table is used for bearing powder and printing formed workpieces. The first powder laying arm is arranged above the forming table. The second spread powder arm with first spread powder arm interval sets up, first spread powder arm with the second spread powder arm can be along being on a parallel with the forming table removes in order to respectively to the powder is spread to the forming table. And the wind field mechanism comprises a blowing port and a receiving port, the blowing port is arranged on the first powder spreading arm and blows air to the forming table, and the receiving port is arranged on the second powder spreading arm and sucks air. And the scanning module is arranged above the forming table and used for emitting laser to the powder between the first powder laying arm and the second powder laying arm so as to solidify the powder to form a finished piece. The scanning module emits laser while the first powder spreading arm spreads powder, the second powder spreading arm moves along with the first powder spreading arm to enable the wind field mechanism to absorb smoke dust formed by solidifying the powder, after the first powder spreading arm spreads the powder, the forming table descends by one layer, the second powder laying arm moves reversely to lay powder, the scanning module emits laser, and the first powder laying arm moves along with the second powder laying arm to enable the wind field mechanism to absorb the smoke dust, so that interference between the smoke dust and a laser light path is prevented.

Above-mentioned metal 3D printing device scans module transmission laser when powder is spread through first shop powder arm to print when realizing spreading the powder, the rethread second is spread the powder arm and is followed first shop powder arm and remove so that wind field mechanism absorbs the smoke and dust that the powder solidification formed, realizes promoting the purpose of shaping quality. In addition, after the powder is spread by the first powder spreading arm, the second powder spreading arm moves reversely to spread the powder again, the scanning module emits laser simultaneously, and the first powder spreading arm moves along with the second powder spreading arm to enable the wind field mechanism to continuously absorb smoke dust, so that the purposes of continuously spreading the powder and continuously printing are achieved, and the printing efficiency is further improved.

In some embodiments, the metal 3D printing device further comprises a powder spreading driver, and the powder spreading driver is respectively connected to the first powder spreading arm and the second powder spreading arm, and is configured to drive the first powder spreading arm and the second powder spreading arm to move back and forth along a powder spreading direction, and to adjust a distance between the first powder spreading arm and the second powder spreading arm during printing, so as to adjust a printing span of the laser according to a shape of the workpiece.

In some embodiments, the scanning module includes a scanning driver and a plurality of mirror units, the plurality of mirror units are arranged in a direction perpendicular to a powder spreading direction, the scanning driver is configured to drive the plurality of mirror units to move in the powder spreading direction, and each mirror unit is configured to emit laser light to solidify the powder in a corresponding lower area.

In some embodiments, the metal 3D printing apparatus is provided with a molding cavity, the galvanometer unit is located in the molding cavity, the scanning module further includes a protective mirror and an air blowing member, the protective mirror is used for sealing the galvanometer unit, and the air blowing member is used for blowing air around the protective mirror to form an air curtain, so as to improve the cleanliness of the galvanometer unit in the molding cavity.

In some embodiments, the metal 3D printing device further comprises a powder feeding mechanism, the first powder spreading arm and the second powder spreading arm are respectively provided with a powder discharging mechanism, the powder feeding mechanism is used for supplying the powder to the powder discharging mechanism, and the powder discharging mechanism is used for controlling the falling and the powder discharging amount of the powder.

In some embodiments, the first powder spreading arm and the second powder spreading arm are respectively provided with a scraper, the scraper extends along a direction perpendicular to the powder spreading direction and is arranged towards the forming table, and the scraper is used for scraping off the powder with a thickness higher than a preset layer thickness.

In some embodiments, the metal 3D printing apparatus further includes a constant temperature mechanism for increasing a temperature constancy of each device in the molding cavity, and an auxiliary purification mechanism for absorbing the smoke overflowing into the molding cavity.

In some embodiments, the metal 3D printing apparatus further includes a powder pumping mechanism, the powder pumping mechanism includes a powder suction driver and a powder suction pipe, the powder suction driver is configured to drive the powder suction pipe to move, and the powder suction pipe is configured to clean the uncured excess powder on the forming table after printing is completed.

In some embodiments, the metal 3D printing device comprises multiple sets of the first powder laying arm, the second powder laying arm, the wind farm mechanism, and the scanning module to print multiple regions of the forming table, respectively.

An embodiment of the present application further provides a metal 3D printing method, including:

the first powder laying arm moves and lays powder to the forming table, and the second powder laying arm moves behind the first powder laying arm;

the scanning module emits laser to powder between the first powder spreading arm and the second powder spreading arm so as to solidify the powder at a preset position;

the wind field mechanism forms a wind field between the first powder laying arm and the second powder laying arm so as to absorb smoke dust formed by powder solidification;

if the forming is not finished, the forming table descends by a distance of one layer of powder;

the second powder laying arm moves reversely and lays powder to the forming table, and the first powder laying arm moves behind the second powder laying arm;

the scanning module emits laser to powder between the first powder laying arm and the second powder laying arm so as to solidify the powder at a preset position;

the wind field mechanism forms a wind field between the first powder laying arm and the second powder laying arm so as to absorb smoke dust formed by powder solidification.

The metal 3D printing method also achieves the purposes of continuous powder laying and continuous printing, and improves the printing efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a metal 3D printing apparatus in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the top of the metal 3D printing apparatus in fig. 1.

Fig. 3 is a schematic structural diagram of a metal 3D printing apparatus in another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a metal 3D printing apparatus in another embodiment of the present application.

Fig. 5 is a schematic structural diagram of the top of the metal 3D printing device in fig. 3.

Fig. 6 is a schematic flow chart of a metal 3D printing method in an embodiment of the present application.

Description of the main elements

Metal 3D printing device 100

Molding table 100a

Molding cavity 100b

Transparent window 100c

First dusting arm 10

Powder feeding mechanisms

11 and 12

Doctor blades

12, 22

Second dusting arm 20

Wind farm mechanism 30

Air blowing port 31

Air collecting opening 32

Scanning module 40

Scan driver 41

Galvanometer unit 42

Powder spreading driver 50

Powder supply mechanism 60

Auxiliary cleaning mechanism 70

Powder pumping mechanism 80

Metal 3D printing method 200

Detailed Description

The technical solutions of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is apparent that the embodiments described are only some embodiments of the present application, and not all embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, in an embodiment of the present application, a metal 3D printing apparatus 100 is provided, which includes a forming table 100a, a first powder spreading arm 10, a second powder spreading arm 20, a wind field mechanism 30, and a scanning module 40. The forming table 100a is horizontally disposed and liftable for carrying metal powder and printing formed products. The first powder spreading arm 10 and the second powder spreading arm 20 are both disposed above the forming table 100a, and have the same distance with the forming table 100a, that is, are located at the same height. The second powder spreading arm 20 and the first powder spreading arm 10 are arranged in parallel along the length direction and are arranged at a certain distance. The first powder laying arm 10 and the second powder laying arm 20 are capable of moving in a plane parallel to the molding table 100a and drop powder downward during the movement to lay a layer of metal powder on the molding table 100 a.

The wind field mechanism 30 includes an air blowing port 31 and an air collecting port 32. The air blowing port 31 is provided in the first dusting arm 10. The air collecting opening 32 is arranged on the second powder laying arm 20. The air blowing port 31 is used to blow the powder on the uppermost layer of the forming table 100a in the direction of the second powder spreading arm 20. The air receiving opening 32 is used for absorbing air blown out from the air blowing opening 31, so that an airflow field is formed between the first powder spreading arm 10 and the second powder spreading arm 20, and the airflow field is used for taking away smoke dust generated during powder condensation, so that the smoke dust is prevented from staying in the forming cavity and interfering with a laser light path, and further the forming quality is influenced. In some embodiments, the air blowing port 31 and the air collecting port 32 are communicated with an external air purification system through a pipeline. The air blowing port 31 and the air collecting port 32 can be connected to the first powder spreading arm 10 and the second powder spreading arm 20 through a lifting or turning mechanism, so that flexible regulation or printing avoidance can be realized.

The scanning module 40 is disposed above the forming table 100a, and is configured to emit laser light to the powder on the forming table 100a in an area between two projections of the first powder spreading arm 10 and the second powder spreading arm 20 on the forming table 100a along the vertical direction, so that the powder is solidified to form a product.

One embodiment of the metal 3D printing device 100 for printing an object is as follows: the first powder laying arm 10 moves from the left side to the right side of the forming table 100a to lay a layer of powder on the forming table 100a, the second powder laying arm 20 moves along with the first powder laying arm 10 on the left side of the first powder laying arm 10, and meanwhile, the scanning module 40 emits laser to the powder between the first powder laying arm 10 and the second powder laying arm 20 to achieve simultaneous powder laying and printing; meanwhile, the wind field mechanism 30 absorbs the smoke dust formed by powder solidification; after the first powder spreading arm 10 finishes powder spreading, namely after the layer of powder is printed, the forming table 100a descends by a distance of one layer of powder to provide a space for the next layer of powder; the second powder laying arm 20 moves leftwards to lay a new layer of powder, the first powder laying arm 10 moves leftwards along with the first powder laying arm 10, meanwhile, the scanning module 40 emits laser to the powder between the first powder laying arm 10 and the second powder laying arm 20, and meanwhile, the wind field mechanism 30 continues to absorb smoke dust formed by powder solidification; the above process is repeated until printing is completed.

The metal 3D printing device 100 further includes a powder laying driver 50. The powder spreading driver 50 is respectively connected with the first powder spreading arm 10 and the second powder spreading arm 20 and is used for driving the first powder spreading arm 10 and the second powder spreading arm 20 to move back and forth along the powder spreading direction. In some embodiments, the distance between the first and second

powder spreading arms

10 and 20 may be a fixed value, i.e., the print span of the scanning module 40 is a fixed value. In other embodiments, the powder spreading driver 50 can adjust the distance between the first powder spreading arm 10 and the second powder spreading arm 20 at any time during the printing process, that is, adjust the distance between the first powder spreading arm 10 and the second powder spreading arm 20 according to the shape of the workpiece on the printing layer, and further adjust the printing span and the wind field span of the laser to improve the printing efficiency and the printing quality.

Referring to fig. 2, in some embodiments, the scan module 40 includes a scan driver 41 and a plurality of galvanometer units 42. The plurality of galvanometer units 42 are arranged in a direction perpendicular to the powder laying direction. The scanning driver 41 is for driving the plurality of galvanometer units 42 to move in the powder laying direction. Each galvanometer unit 42 is used to emit laser light downward to cure the powder of the corresponding lower area. In the illustrated embodiment, four galvanometer units 42 are arranged, and in other embodiments, the number of galvanometer units 42 may be varied according to the width of the forming table 100a, such as integrating 5 to 20 galvanometer units 42 within 1 meter.

Referring to fig. 1, the metal 3D printing apparatus 100 is provided with a forming cavity 100b. In some embodiments, the scanning module 40 is disposed outside the forming cavity 100b and on the top of the metal 3D printing device 100, and the top of the metal 3D printing device 100 is provided with a transparent window 100c for transmitting the laser. In other embodiments, the galvanometer unit 42 is located inside the molding cavity 100b (as shown in fig. 4), and the scanning module 40 further comprises a protective mirror (not shown) for sealing the galvanometer unit 42 and an air blowing member (not shown) for blowing air around the protective mirror to form an air curtain to improve cleanliness of the galvanometer unit 42 inside the molding cavity 100b.

In some embodiments, the metallic 3D printing device 100 further includes a powder supply mechanism 60. The first powder laying arm 10 and the second powder laying arm 20 are respectively provided with a powder feeding mechanism 11 and a powder feeding mechanism 12. The two powder supply mechanisms 60 are respectively located on the left and right sides of the molding cavity 100b, and are used for respectively supplying metal powder to the

powder feeding mechanisms

11 and 12 in the first powder laying arm 10 or the second powder laying arm 20 which move to the two sides of the molding table 100 a. The

powder discharging mechanisms

11 and 12 are used for controlling the falling of the powder, and switches capable of adjusting the powder discharging amount are designed in the

powder discharging mechanisms

11 and 12, so that the powder discharging amount in each time can be controlled.

In some embodiments, the bottom of the first powder spreading arm 10 and the bottom of the second powder spreading arm 20 are respectively provided with

scrapers

12 and 22. The

scrapers

12, 22 extend perpendicularly to the powder laying direction and are disposed toward the forming table 100a, and the

scrapers

12, 22 are used to scrape off powder higher than a predetermined layer thickness. An automatic adjusting mechanism (not shown) is arranged between the

scrapers

12 and 22 and the first powder spreading arm 10 and the second powder spreading arm 20, and can move within a certain range of height, so that the thickness of each layer of printing layer in the printing process can be adjusted, and the flexibility of the printing layer thickness and the powder compaction function are improved.

In some embodiments, the metal 3D printing device 100 further includes a thermostatic mechanism (not shown) and an auxiliary purging mechanism 70. The constant temperature mechanism is used for ensuring that the temperature of all precision devices in the molding cavity 100b is constant so as to improve the printing precision. The auxiliary cleaning mechanisms 70 are disposed at two sides of the molding cavity 100b, and are used for assisting in blowing air into the molding cavity 100b, and further assisting in absorbing the smoke scattered into the molding cavity 100b.

In some embodiments, the metallic 3D printing device 100 further includes a powder extraction mechanism 80. The powder pumping mechanism 80 includes a powder suction driver and a powder suction pipe (not shown), the powder suction driver is used for driving the powder suction pipe to move, and the powder suction pipe is used for cleaning the uncured excess powder on the forming table 100a after the printing is completed. As an illustrative example, the powder suction driver can be a three-axis linear driving slide rail or a mechanical arm, and is used for automatically programming and fully automatically cleaning the excessive powder after printing.

Referring to fig. 3, 4 and 5, it can be understood that, in some embodiments, the metal 3D printing apparatus 100 includes a plurality of sets of the first powder spreading arm 10, the second powder spreading arm 20, the wind field mechanism 30 and the scanning module 40 to print a plurality of regions of the forming table 100a respectively. Each of the first powder spreading arm 10 and the second powder spreading arm 20 corresponds to one wind field mechanism 30 and one scanning module 40.

Referring to fig. 1, to sum up, one embodiment of the metal 3D printing apparatus 100 for printing a workpiece is: the powder supply mechanism 60 on the left side supplies metal powder to the

powder feeding mechanisms

11 and 12 of the first powder laying arm 10 and the second powder laying arm 20, the powder laying driver 50 drives the first powder laying arm 10 to move from the left side to the right side of the forming table 100a so as to lay a layer of powder on the forming table 100a, the thickness of the powder is guaranteed through the scraper 12, and the second powder laying arm 20 moves along with the first powder laying arm 10 on the left side of the first powder laying arm 10;

meanwhile, the scanning driver 41 drives the plurality of galvanometer units 42 to move rightwards, the plurality of galvanometer units 42 emit laser to the powder between the first powder laying arm 10 and the second powder laying arm 20, and flight printing is realized, the flight printing is an algorithm integrating synchronous compensation of paths of the plurality of galvanometer units 42, the algorithm adopts constant calculation force pre-calculation and division data to be written into a galvanometer control system respectively, and meanwhile, the air blowing port 31 and the air receiving port 32 absorb smoke dust formed by powder solidification;

after the first powder spreading arm 10 and the second powder spreading arm 20 move to the right side, the powder supply mechanism 60 on the right side supplies metal powder to the

powder feeding mechanisms

11 and 12 of the first powder spreading arm 10 and the second powder spreading arm 20; the forming table 100a descends by a distance of a layer of powder, then the powder paving driver 50 drives the second powder paving arm 20 to move leftwards to pave a new layer of powder, the thickness of the powder is ensured by the scraper 22, the first powder paving arm 10 moves leftwards along with the first powder paving arm 10, meanwhile, the scanning driver 41 drives the plurality of mirror units 42 to move leftwards, the mirror units 42 emit laser to the powder between the first powder paving arm 10 and the second powder paving arm 20, and meanwhile, the wind field mechanism 30 absorbs smoke formed by powder solidification; in the whole printing process, the constant temperature mechanism and the auxiliary purification mechanism 70 continuously operate, the above processes are repeated until the printing is completed, the molded part is taken away, and the powder pumping mechanism 80 cleans the residual powder. By way of illustrative example, the distance between the first powder spreading arm 10 and the second powder spreading arm 20 is in the range of 100-500mm, and may also extend to a size of several meters or more.

Referring to fig. 6, an embodiment of the present application further provides a metal 3D printing method 200, including:

s1: the first powder laying arm 10 moves and lays powder to the forming table 100a, and the second powder laying arm 20 moves behind the first powder laying arm 10;

s2: the scanning module 40 emits laser to the powder between the first powder spreading arm 10 and the second powder spreading arm 20 to solidify the powder at a preset position;

s3: the wind field mechanism 30 forms a wind field between the first powder laying arm 10 and the second powder laying arm 20 to absorb the smoke dust formed by powder solidification;

s4: judging whether the molding is finished or not;

if the forming is finished:

s5: ending;

if the forming is not finished:

s6: the distance that the forming table 100a is lowered by one layer of powder;

s7: the second powder laying arm 20 moves reversely and lays powder on the forming table 100a, and the first powder laying arm 10 moves behind the second powder laying arm 20;

s8: the scanning module 40 emits laser to the powder between the first powder spreading arm 10 and the second powder spreading arm 20 to solidify the powder at a preset position;

s9: the wind field mechanism 30 forms a wind field between the first powder laying arm 10 and the second powder laying arm 20 to absorb smoke dust formed by powder solidification;

s10: judging whether the molding is finished or not;

if not, forming:

s11: the molding table 100a is lowered by a distance of one layer of powder and returns to S1;

and returning to S5 if the forming is finished.

The metal 3D printing device 100 and the metal 3D printing method 200 print while powder is spread by the first powder spreading arm 10, the scanning module 40 emits laser, so that powder is spread while printing is performed, and then the second powder spreading arm 20 moves along with the first powder spreading arm 10 to enable the wind field mechanism 30 to absorb smoke formed by powder solidification, so that the purpose of improving the forming quality is achieved. In addition, after the powder is spread by the first powder spreading arm 10, the second powder spreading arm 20 moves reversely to spread the powder again, the scanning module 40 emits laser simultaneously, and the first powder spreading arm 10 moves along with the second powder spreading arm 20 to enable the wind field mechanism 30 to continuously absorb the smoke dust, so that the purposes of continuously spreading the powder and continuously printing are achieved, and the printing efficiency is further improved.

In addition, those skilled in the art should recognize that the above embodiments are provided for illustrative purposes only and are not intended to limit the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the true spirit and scope of the present application.

Claims

1. The metal 3D printing device is characterized by comprising:

the forming table is used for bearing powder and printing formed workpieces;

the first powder laying arm is arranged above the forming table;

the first powder spreading arm and the second powder spreading arm can move along a direction parallel to the forming table to spread powder to the forming table respectively;

the air field mechanism comprises an air blowing port and an air collecting port, the air blowing port is arranged on the first powder spreading arm and blows air to the forming table, and the air collecting port is arranged on the second powder spreading arm and sucks air; and

the scanning module is arranged above the forming table and used for emitting laser to the powder between the first powder laying arm and the second powder laying arm so as to solidify the powder to form the workpiece;

the powder spraying device comprises a scanning module, a first powder paving arm, a second powder paving arm, a forming table and a powder spraying arm, wherein the scanning module is used for scanning the powder, the first powder paving arm is used for spraying the powder, the scanning module is used for emitting laser, the second powder paving arm is used for moving along with the first powder paving arm so that the wind field mechanism can absorb the smoke formed by solidifying the powder, after the powder paving of the first powder paving arm is finished, the forming table descends by one layer for the distance of the powder, the second powder paving arm moves in the reverse direction so that the powder can be sprayed, the scanning module is used for emitting laser, and the first powder paving arm is used for moving along with the second powder paving arm so that the wind field mechanism can absorb the smoke.

2. The metal 3D printing device of claim 1, wherein: metal 3D printing device is still including spreading the powder driver, spread the powder driver and connect respectively first shop powder arm with the powder arm is spread to the second, is used for the drive first shop powder arm with the powder arm is spread to the second is followed and is spread powder direction reciprocating motion, and can adjust at the printing in-process first shop powder arm with distance between the powder arm is spread to the second, in order to according to the printing span of laser is adjusted to the shape of finished piece.

3. The metallic 3D printing device of claim 1, wherein: the scanning module includes scanning driver and a plurality of mirror unit that shakes, and is a plurality of the mirror unit that shakes is arranged along the perpendicular to powder paving direction and is set up, the scanning driver is used for driving a plurality of the mirror unit that shakes removes along powder paving direction, every the mirror unit that shakes is used for transmitting laser in order to solidify the corresponding below region the powder.

4. The metal 3D printing apparatus of claim 3, wherein: metal 3D printing device is equipped with the shaping chamber, the mirror unit that shakes is located the shaping intracavity, scanning module still includes the protective glass and blows the piece, the protective glass is used for sealing the mirror unit that shakes, it is used for blowing to blow around the protective glass and forms the gas curtain, in order to improve the mirror unit that shakes is in cleanliness factor in the shaping intracavity.

5. The metal 3D printing device of claim 1, wherein: metal 3D printing device is still including supplying whitewashed mechanism, first shop powder arm with the powder arm is laid to the second is equipped with down powder mechanism respectively, supply powder mechanism be used for to lower powder mechanism provides the powder, lower powder mechanism is used for control the whereabouts and the lower powder volume of powder.

6. The metallic 3D printing device of claim 1, wherein: first shop powder arm with the powder arm is laid to the second is equipped with the scraper respectively, the scraper is spread the powder direction along the perpendicular to and is extended and court the shaping platform sets up, the scraper is used for spreading the powder to make every layer powder thickness and roughness are controllable.

7. The metallic 3D printing device of claim 1, wherein: the metal 3D printing device further comprises a constant temperature mechanism and an auxiliary purification mechanism, wherein the constant temperature mechanism is used for improving the temperature constancy of each device in the forming cavity, and the auxiliary purification mechanism is used for absorbing the smoke dust overflowing into the forming cavity.

8. The metal 3D printing device of claim 1, wherein: the metal 3D printing device further comprises a powder pumping mechanism, the powder pumping mechanism comprises a powder suction driver and a powder suction pipe, the powder suction driver is used for driving the powder suction pipe to move, and the powder suction pipe is used for cleaning the uncured redundant powder on the forming table after printing is completed.

9. The metal 3D printing device of claim 1, wherein: the metal 3D printing device comprises a plurality of groups of the first powder laying arms, the second powder laying arms, the wind field mechanism and the scanning module so as to print a plurality of areas of the forming table respectively.

10. A metal 3D printing method is characterized by comprising the following steps:

the wind field mechanism forms a wind field between the first powder laying arm and the second powder laying arm so as to absorb smoke dust formed in the powder curing process;