SLM printer

Abstract

The utility model provides an SLM printer which comprises a machine case, a bin door arranged at the front end of the machine case, a laser emitting assembly, a machining platform and a powder bin arranged in the machine case, a high-pressure argon tank arranged on the outer side of the machine case, an air spraying pipe arranged at the output end of the high-pressure argon tank and extending into the machine case, and an electromagnetic valve arranged on the air spraying pipe and used for driving the air spraying pipe to be switched on and off. The high-pressure argon bottle is arranged, so that argon is input into the case when the printer works and stops, metal powder is stabilized and prevented from being oxidized, and the sealing strip is arranged on the bin door, so that the loss of argon is reduced, and the storage time of the metal powder is prolonged.

Description

Technical Field

[0001] The utility model relates to a 3D printer, in particular to an SLM printer. Background Art

[0002] Currently, a Chinese patent with announcement number CN215315720U discloses a storage protection device for an SLM3D printer, which includes a printer body and a right-angle flap. The front surface of the printer body is movably connected to a movable door, and a set of right-angle flaps are embedded in the diagonals of the printer body. The upper surface of the printer body is connected to a winding device near the four sides. The right-angle flaps protect the printer from collisions during storage, and the winding device prevents the printer from accumulating dust.

[0003] The above patent still has shortcomings. When the printer is not used for a long time, the metal powder in its hopper is prone to oxidation, making it unusable. It is usually necessary to take out the metal powder in the hopper and seal it to slow down oxidation. However, taking out the metal powder and subsequently adding metal powder are more troublesome and the labor cost is high. Utility Model Content

[0004] In view of this, an object of the present invention is to provide an SLM printer, which has the advantage of convenient storage of metal powder.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an SLM printer, comprising a chassis, a compartment door is provided at the front end of the chassis, a laser emission component, a processing platform and a powder bin are provided in the chassis, a high-pressure argon tank is provided on the outside of the chassis, an injection pipe is provided at the output end of the high-pressure argon tank and extends into the chassis, an electromagnetic valve for driving the injection pipe to be on and off is also provided on the injection pipe, and a sealing strip is provided on the compartment door.

[0006] Through the above technical means, by setting up a high-pressure argon cylinder, argon gas is input into the chassis when the printer is working and stopped, so as to stabilize the metal powder and prevent the metal powder from oxidation. By setting a sealing strip on the compartment door, the loss of argon gas is reduced and the shelf life of the metal powder is increased.

[0007] Preferably, the powder silos are symmetrically arranged on both sides of the processing platform, and a linear motor is provided at the bottom of each of the powder silos. The output end of the linear motor is provided with a first push plate, and the first push plate drives the metal powder in the powder silo to move up and down. A scraper assembly is also provided in the chassis, and the scraper assembly is used to feed the metal powder in the powder silo into the processing platform or to feed the metal powder on the processing platform into the powder silo.

[0008] Through the above technical means, the linear motor drives the first push plate to move up and down, and cooperates with the scraper assembly to complete the loading and unloading of metal powder.

[0009] Preferably, the scraper assembly includes a screw motor, a roller frame and a scraper roller. The scraper roller is rotatably set on the roller frame. The tail of the roller frame is threadedly engaged with the output end of the screw motor. When the screw motor rotates, it drives the roller frame and the scraper roller to move between the powder bin and the processing platform.

[0010] Through the above technical means, the roller frame is driven to move by the screw motor to realize the feeding of metal powder, and the flatness of the metal powder is ensured by the scraper roller, thereby ensuring the welding accuracy of the product during laser welding.

[0011] Preferably, a light-transmitting plate is further provided in the chassis, and the light-transmitting plate is provided at the upper end of the roller frame, a movable cavity is formed between the light-transmitting plate and the chassis, the tail of the roller frame passes through the movable cavity and cooperates with the screw motor, and the air injection pipe is provided at the lower end of the light-transmitting plate.

[0012] Through the above-mentioned technical means, by setting a light-transmitting plate and setting the screw motor above the light-transmitting plate, it is not easy for metal powder to contaminate the screw motor, thereby ensuring the service life of the screw motor, and at the same time not affecting laser welding. The air injection pipe is set at the lower end of the light-transmitting plate, which can reduce the use of gas and reduce the cost of gas use.

[0013] Preferably, a first inclined guide surface is provided at the front and rear of the powder bin, and a second inclined guide surface cooperating with the first inclined guide surface is provided on the scraping roller.

[0014] Through the above technical means, by setting the inclined guide surface 1 and the inclined guide surface 2, the metal powder lifted by the scraper roller slides back into the powder bin along the inclined guide surface 1, reducing the accumulation of powder in other positions of the chassis.

[0015] Preferably, a second linear motor is provided at the bottom of the processing platform, a second pusher plate is provided at the output end of the second linear motor, and the top surface of the second pusher plate is arranged horizontally.

[0016] Through the above technical means, by setting the top surface of the second pusher plate horizontally, it is convenient to sweep the metal powder on the second pusher plate back to the powder bin, thereby reducing the waste of metal powder.

[0017] Preferably, a cover groove is opened at the side end of the powder silo, and a linear motor three and a sealing cover plate are arranged in the cover groove. The sealing cover plate is fixedly arranged at the output end of the linear motor three, and the powder silo is sealed when the linear motor three pushes out the sealing cover plate.

[0018] Through the above technical means, the linear motor is used to control the movement of the sealing cover and seal the powder bin, thereby further increasing the shelf life of the metal powder. At the same time, the sealing performance of the chassis can be appropriately reduced, thereby reducing production costs.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By installing a high-pressure argon cylinder, argon is fed into the chassis when the printer is working or stopped, which stabilizes the metal powder and prevents oxidation. The linear motor controls the movement of the sealing cover and seals the powder bin, further extending the shelf life of the metal powder.

[0021] 2. By setting a light-transmitting plate and placing the lead screw motor above the light-transmitting plate, it is not easy for metal powder to contaminate the lead screw motor, thereby ensuring the service life of the lead screw motor and not affecting laser welding. Placing the air jet at the lower end of the light-transmitting plate can reduce gas usage and reduce gas usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of an embodiment;

[0023] Figure 2 A cross-sectional view of an embodiment Figure 1 ;

[0024] Figure 3 A cross-sectional view of an embodiment Figure 2 .

[0025] Figure numerals: 1. Chassis; 2. Chamber door; 3. Laser emitter; 4. Processing platform; 5. Powder silo; 6. High-pressure argon tank; 7. Jet tube; 8. Solenoid valve; 9. Linear motor one; 10. First push plate; 11. Linear motor two; 12. Second push plate; 13. Scraper assembly; 14. Screw motor; 15. Roller frame; 16. Scraper roller; 17. Light-transmitting plate; 18. Inclined guide surface one; 19. Inclined guide surface two; 20. Cover groove; 21. Linear motor three; 22. Sealing cover plate. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0027] An SLM printer includes a chassis 1, a bin door 2 is provided at the front end of the chassis 1, a laser emitting assembly, a processing platform 4 and a powder bin 5 are provided in the chassis 1, the laser emitting assembly includes a laser emitter 3 and a refracting mirror arranged on the top of the chassis 1, the laser emitter 3 and the refracting mirror are existing technologies and will not be elaborated on here, a high-pressure argon tank 6 is provided on the outside of the chassis 1, argon is compressed in the high-pressure argon tank 6, an injection pipe 7 is provided at the output end of the high-pressure argon tank 6 and extends into the chassis 1, and an electromagnetic valve 8 for driving it to be turned on and off is also provided on the injection pipe 7. When the electromagnetic valve 8 is opened, argon can be introduced into the chassis 1, and a sealing strip is provided on the bin door 2. When the printer is working, the introduction of argon can reduce oxidation caused by the high temperature of laser welding. When the printer is stopped, the input of argon into the chassis 1 can stabilize the metal powder and prevent the metal powder from oxidizing. By arranging a sealing strip on the bin door 2, the loss of argon can be reduced and the shelf life of the metal powder can be increased.

[0028] The powder silos 5 are symmetrically arranged on both sides of the processing platform 4. A linear motor 9 is provided at the bottom of each powder silo 5. A first pusher plate 10 is provided at the output end of the linear motor 9. The first pusher plate 10 drives the metal powder in the powder silo 5 to move up and down. A linear motor 2 11 is provided at the bottom of the processing platform 4. A second pusher plate 12 is provided at the output end of the linear motor 2 11. The top surface of the second pusher plate 12 is horizontally arranged.

[0029] A scraper assembly 13 is also provided in the chassis 1. The scraper assembly 13 is used to feed the metal powder in the powder silo 5 into the processing platform 4 or to feed the metal powder on the processing platform 4 into the powder silo 5. The scraper assembly 13 includes a screw motor 14, a roller frame 15 and a scraper roller 16. The scraper roller 16 is rotatably set on the roller frame 15. The tail of the roller frame 15 is threadedly engaged with the output end of the screw motor 14. When the screw motor 14 rotates, it drives the roller frame 15 and the scraper roller 16 to move between the powder silo 5 and the processing platform 4, thereby realizing the feeding of metal powder. The flatness of the metal powder is ensured by the rotation setting of the scraper roller 16, and the welding stability of the product is ensured during laser welding.

[0030] A light-transmitting plate 17 is also provided in the chassis 1. The light-transmitting plate 17 is provided at the upper end of the roller frame 15. A movable cavity is formed between the light-transmitting plate 17 and the chassis 1. The tail of the roller frame 15 passes through the movable cavity and cooperates with the screw motor 14. The jet pipe 7 is provided at the lower end of the light-transmitting plate 17. The laser emitting assembly is provided at the upper end of the light-transmitting plate 17. The laser emitted by the laser emitting assembly can pass through the light-transmitting plate 17 to weld the metal powder. By providing the light-transmitting plate 17 and providing the screw motor 14 above the light-transmitting plate 17, the metal powder is not easy to contaminate the screw motor 14, thereby ensuring the service life of the screw motor 14 and not affecting the laser welding. Due to the characteristic that the density of argon gas is greater than that of air, the jet pipe 7 is provided at the lower end of the light-transmitting plate 17, which can reduce the use of gas and reduce the cost of gas use.

[0031] An inclined guide surface 18 is provided at the front and rear of the powder silo 5, and an inclined guide surface 2 19 is provided on the scraper roller 16 to cooperate with the inclined guide surface 18. By providing the inclined guide surface 18 and the inclined guide surface 2 19, the metal powder raised by the scraper roller 16 can slide back into the powder silo 5 along the inclined guide surface 18, thereby reducing the accumulation of powder at other positions of the chassis 1.

[0032] A cover groove 20 is provided at the side end of the powder silo 5, and a linear motor three 21 and a sealing cover plate 22 are provided in the cover groove 20. The sealing cover plate 22 is fixedly provided at the output end of the linear motor three 21. When the linear motor three 21 pushes out the sealing cover plate 22, the powder silo 5 is sealed. When the machine needs to be shut down, the sealing cover plate 22 is controlled by the linear motor three 21 to move and seal the powder silo 5, thereby further increasing the shelf life of the metal powder. At the same time, the sealing performance of the chassis 1 can be appropriately reduced during the production of the chassis 1, thereby reducing the production cost.

[0033] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. An SLM printer, comprising a chassis (1), wherein a door (2) is provided at the front end of the chassis (1), and wherein: The chassis (1) is provided with a laser emission component, a processing platform (4) and a powder bin (5); a high-pressure argon tank (6) is provided on the outside of the chassis (1); an injection pipe (7) is provided at the output end of the high-pressure argon tank (6) and extends into the chassis (1); a solenoid valve (8) for driving the injection pipe (7) to be opened and closed is also provided on the injection pipe (7); and a sealing strip is provided on the bin door (2).

2. The SLM printer according to claim 1, wherein: The powder bins (5) are symmetrically arranged on both sides of the processing platform (4), and a linear motor (9) is provided at the bottom of each of the two powder bins (5). The output end of the linear motor (9) is provided with a first push plate (10), and the first push plate (10) drives the metal powder in the powder bin (5) to move up and down. A scraper assembly (13) is also provided in the chassis (1), and the scraper assembly (13) is used to send the metal powder in the powder bin (5) into the processing platform (4) or send the metal powder on the processing platform (4) into the powder bin (5).

3. The SLM printer according to claim 2, wherein: The scraper assembly (13) includes a screw motor (14), a roller frame (15) and a scraper roller (16). The scraper roller (16) is rotatably arranged on the roller frame (15). The tail of the roller frame (15) is threadedly engaged with the output end of the screw motor (14). When the screw motor (14) rotates, the roller frame (15) and the scraper roller (16) are driven to move between the powder bin (5) and the processing platform (4).

4. The SLM printer according to claim 3, wherein: A light-transmitting plate (17) is further provided in the chassis (1), and the light-transmitting plate (17) is provided at the upper end of the roller frame (15). A movable cavity is formed between the light-transmitting plate (17) and the chassis (1). The tail of the roller frame (15) passes through the movable cavity and cooperates with the lead screw motor (14). The air injection pipe (7) is provided at the lower end of the light-transmitting plate (17).

5. The SLM printer according to claim 3, wherein: The powder bin (5) is provided with an inclined guide surface 1 (18) at the front and rear, and the scraper roller (16) is provided with an inclined guide surface 2 (19) matched with the inclined guide surface 1 (18).

6. The SLM printer according to claim 1, wherein: A second linear motor (11) is provided at the bottom of the processing platform (4), and a second pusher plate (12) is provided at the output end of the second linear motor (11), and the top surface of the second pusher plate (12) is arranged horizontally.

7. The SLM printer according to claim 1, wherein: A cover groove (20) is provided at the side end of the powder bin (5), and a linear motor (21) and a sealing cover plate (22) are provided in the cover groove (20). The sealing cover plate (22) is fixedly provided at the output end of the linear motor (21), and the powder bin (5) is sealed when the linear motor (21) pushes out the sealing cover plate (22).

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