Powder laying device and metal 3D printing apparatus

Abstract

The utility model relates to metal 3D printing equipment technical field, concretely is powder laying device and metal 3D printing equipment, the mechanism includes scraper frame and uniform material mechanism, scraper frame is driven along the horizontal direction removal of forming chamber through the slide rail drive of installation in metal 3D printing body forming chamber, and scraper frame bottom end is provided with cloth powder groove, and uniform material mechanism is by the second translation mechanism of installation at scraper frame top, the buffer box of installation on the second translation mechanism, the stirring subassembly of installation in the second mobile seat inside and support frame constitute. The utility model discloses through uniform material mechanism, and powder is conveniently delivered to cloth powder groove even, so that the powder distribution is more even when printing, and the printing quality is improved, through the limiting mechanism, the powder discharge range in cloth powder groove is conveniently adjusted, avoids causing the waste of powder, and further improves the printing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of metal 3D printing equipment, specifically to a powder laying device and metal 3D printing equipment. Background Technology

[0002] Metal 3D printing equipment is a high-end manufacturing equipment that uses additive manufacturing technology to deposit metal materials layer by layer into complex three-dimensional solids. It has wide applications in aerospace, medical implants, automotive, energy, and mold making, and can achieve complex structures, lightweight designs, and functional integrations that are difficult to achieve using traditional processing methods.

[0003] Chinese Patent Publication No. CN118751946A discloses a single-layer dual-powder powder spreading device and method for SLM metal 3D printing equipment. The device includes two powder supply chambers loaded with different metal powders; the powder outlet at the lower end of the powder dispenser is directly opposite a pre-set powder dispensing interface at the upper end of the forming chamber; a fixed powder dispensing slide and a movable scraper mechanism are provided inside the forming chamber; the upper end of the powder dispensing slide is fixedly connected to the top surface inside the forming chamber; a powder suction hood is connected to the scraper holder, and the powder suction hood is connected to a suction device. This invention enables single-layer dual-material printing during the printing process, and the powder spreading mechanism has a simple structure and high powder spreading efficiency, thus improving the applicability of 3D printing equipment.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: due to the setting of the feeding slide and scraper mechanism, the powder spreading range cannot be adjusted according to the model of the metal part to be printed, which can easily result in too much or too little powder spreading, which can easily affect printing efficiency and quality. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a powder laying device and a metal 3D printing equipment.

[0006] The technical solution of this utility model is as follows: A powder laying device includes a scraper holder, which is driven to move horizontally along the forming chamber by a slide rail installed in the forming chamber of the metal 3D printing body. A powder distribution groove is opened at the bottom of the scraper holder, and a scraper is provided on the side wall of the scraper holder; and a material leveling mechanism, which consists of a second translation mechanism installed at the top of the scraper holder, a buffer box installed on the second translation mechanism, a stirring component installed inside the second moving seat, and a support structure. The second translation mechanism drives the buffer box to adjust its horizontal displacement along the scraper holder. An electric valve is installed at the output end of the second moving seat. The electric valve is located directly above the powder distribution groove. The input end of the guide pipe is connected to the output end of the powder supply mechanism on the metal 3D printing body, and the output end of the guide pipe extends to the top of the feed port of the buffer box.

[0007] Preferably, the second translation mechanism consists of a protective box installed at the top of the scraper frame, a threaded rod that is rotatably connected to the scraper frame by a motor drive, a guide rod disposed below the threaded rod, and a second movable seat installed between the threaded rod and the guide rod, with the bottom end of the second movable seat connected to the buffer box.

[0008] Preferably, the stirring assembly consists of a rotating shaft connected to the second movable seat by a motor drive and multiple sets of stirring blades evenly installed on the outer circumference of the rotating shaft, with the stirring blades corresponding to the inner wall of the second movable seat.

[0009] Preferably, the scraper holder is also provided with a limiting mechanism, which includes a mounting groove, which is opened at the bottom of the side wall of the scraper holder. A first translation mechanism is provided inside the mounting groove. The first translation mechanism consists of a motor installed inside the mounting groove and a bidirectional threaded rod that is connected to the output end of the motor. There are also two sets of first moving seats. The two sets of first moving seats are driven by the first translation mechanism to slide closer to or further away from the scraper holder. A limiting plate is installed at the bottom of the first moving seat. The limiting plate is slidably connected to the powder distribution trough.

[0010] This utility model also discloses a metal 3D printing device, including the powder laying device described above.

[0011] Preferably, a support frame is provided at the top of the molding chamber of the metal 3D printing body, and the other end of the support frame is connected to the material guide tube, which is inclinedly set in the molding chamber through the support frame.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: the powder is evenly conveyed to the powder distribution trough through the material distribution mechanism, so that the powder distribution is more uniform during printing and the printing quality is improved. The powder discharge range in the powder distribution trough is easily adjusted through the limiting mechanism, avoiding powder waste and further improving printing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the powder laying device of this utility model;

[0014] Figure 2 This is a schematic diagram of the powder laying device of this utility model;

[0015] Figure 3 This is a schematic diagram of the material leveling mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram showing the connection between the powder laying device and the metal 3D printing body of this utility model.

[0017] Reference numerals: 1. Scraper holder; 101. Mounting slot; 102. First translation mechanism; 103. First moving seat; 104. Powder trough; 105. Limiting plate; 2. Protective plate; 3. Scraper; 4. Second translation mechanism; 5. Second moving seat; 501. Buffer box; 502. Mounting cavity; 503. Electric valve; 504. Rotating shaft; 505. Stirring blade; 506. Feed pipe; 507. Support frame; 6. Metal 3D printed body. Detailed Implementation

[0018] Example 1

[0019] like Figures 1 to 3 As shown, the powder spreading device proposed in this utility model includes a scraper holder 1 and a material spreading mechanism. The scraper holder 1 is driven to move horizontally along the forming chamber by a slide rail installed in the forming chamber of the metal 3D printing body 6. A powder spreading groove 104 is provided at the bottom of the scraper holder 1, and a scraper 3 is provided on the side wall of the scraper holder 1. The material spreading mechanism consists of a second translation mechanism 4 installed at the top of the scraper holder 1, a buffer box 501 installed on the second translation mechanism 4, a stirring assembly installed inside the second moving seat 5, and a support frame 507. The second translation mechanism 4 drives the buffer box 501 to move horizontally along the scraper holder 1. An electric valve 503 is installed at the output end of the second moving seat 5. The electric valve 503 is located directly above the powder spreading groove 104. The input end of the guide pipe 506 is connected to the output end of the powder supply mechanism on the metal 3D printing body 6. The powder supply mechanism is existing technology. The output end of the guide pipe 506 extends to the top of the feed port of the buffer box 501.

[0020] Furthermore, the second translation mechanism 4 consists of a protective box installed at the top of the scraper frame 1, a threaded rod that is rotatably connected to the scraper frame 1 by a motor drive, a guide rod set below the threaded rod, and a second movable seat 5 installed between the threaded rod and the guide rod. The bottom end of the second movable seat 5 is connected to the buffer box 501. The second movable seat 5 is threadedly connected to the threaded rod and slidably connected to the guide rod. The motor is started by the controller to drive the threaded rod to rotate. Under the guidance of the guide rod, the second movable seat 5 is moved and adjusted horizontally along the threaded rod, thereby moving the buffer box 501 horizontally.

[0021] Furthermore, the stirring assembly consists of a rotating shaft 504 connected to the second movable seat 5 by a motor drive and multiple sets of stirring blades 505 evenly installed on the outer circumference of the rotating shaft 504. The stirring blades 505 correspond to the inner wall of the second movable seat 5. The second movable seat 5 has an installation cavity 502. The motor that drives the rotating shaft 504 to rotate is installed in the installation cavity 502. The motor is started by the controller to drive the rotating shaft 504 to rotate, thereby driving the multiple sets of stirring blades 505 to rotate. This can stir and agitate the powder inside the buffer tank 501, preventing blockage of the outlet of the buffer tank 501 and affecting the discharge of the electric valve 503.

[0022] Furthermore, the scraper holder 1 is also provided with a limiting mechanism, which includes a mounting groove 101 and a first movable seat 103. The mounting groove 101 is opened at the bottom end of the side wall of the scraper holder 1. A first translation mechanism 102 is provided inside the mounting groove 101. The first translation mechanism 102 is composed of a motor installed inside the mounting groove 101 and a bidirectional threaded rod that drives the output end of the motor. Two sets of first movable seats 103 are provided. The two sets of first movable seats 103 are driven by the first translation mechanism 102 to slide closer to or further away from the scraper holder 1. A limiting plate 105 is installed at the bottom end of the first movable seat 103. The limiting plate 105 is slidably connected to the powder distribution trough 104.

[0023] Furthermore, a protective plate 2 is provided on the side wall of the scraper holder 1 and below the mounting groove 101 to shield the powder on the substrate in the molding chamber of the metal 3D printing body 6, so as to prevent the powder from entering the mounting groove 101 and interfering with the first translation mechanism 102.

[0024] In this embodiment, the feed tube 506 is connected to the powder supply mechanism on the metal 3D printing body 6. Initially, the scraper holder 1 is located near the outlet of the feed tube 506, ensuring the outlet is above the buffer tank 501 for easy material receiving. A suitable amount of powder is then fed into the buffer tank 501 via the powder supply mechanism. Next, the second translation mechanism 4 is activated, causing the buffer tank 501 to move horizontally along the scraper holder 1. It should be noted that a flow meter is also installed at the output end of the buffer tank 501 to detect the amount of powder passing through. The valve of the electric valve 503 is opened, and the powder is then fed into the buffer tank via the stirring assembly. The rotation drives the powder to be discharged from the output end of the buffer box 501 into the powder distribution tank 104. Due to the second translation mechanism 4 driving the buffer box 501 to reciprocate horizontally, the powder in the buffer box 501 can fall evenly into the powder distribution tank 104. When the amount of discharged powder reaches the set value, the metal 3D printing body 6 is activated, causing the scraper 1 to move towards the substrate in the forming chamber, and the powder is evenly delivered to the appropriate position of the substrate. Then, the laser module on the metal 3D printing body 6 is used for printing. Through the setting of the material distribution mechanism, the printing area can be evenly provided with appropriate powder, thereby improving the printing quality.

[0025] The controller activates the first translation mechanism 102, driving the two sets of first moving seats 103 to move closer or further apart, thereby causing the two sets of limiting plates 105 to slide closer or further apart along the powder distribution trough 104. The material distribution mechanism delivers an appropriate amount of powder into the powder distribution trough 104 between the two sets of limiting plates 105, and the metal 3D printing body 6 can then be started to print. By adjusting and limiting the two sets of limiting plates 105, the powder discharged from the powder distribution trough 104 can be adapted to the model of the metal printed part, thereby adjusting the powder distribution range discharged from the powder distribution trough 104, avoiding powder waste, and saving resources.

[0026] Example 2

[0027] like Figure 1 and Figure 4 As shown, the metal 3D printing equipment proposed in this utility model includes the powder laying device described in Embodiment 1. A support frame 507 is provided at the top of the molding chamber of the metal 3D printing body 6. The other end of the support frame 507 is connected to the material guide pipe 506. The material guide pipe 506 is inclinedly arranged in the molding chamber through the support frame 507.

[0028] In this embodiment, the guide tube 506 is inclined relative to the molding process, which facilitates the guidance of powder in the powder supply mechanism to the buffer box 501.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A powder spreading device, characterized in that, include The scraper holder (1) is driven to move horizontally along the molding chamber by a slide rail installed in the molding chamber of the metal 3D printing body (6). The bottom end of the scraper holder (1) is provided with a powder trough (104), and the side wall of the scraper holder (1) is provided with a scraper (3). The material feeding mechanism consists of a second translation mechanism (4) installed on the top of the scraper holder (1), a buffer box (501) installed on the second translation mechanism (4), a stirring assembly installed inside the second moving seat (5), and a support frame (507). The second translation mechanism (4) drives the buffer box (501) to move horizontally along the scraper holder (1). An electric valve (503) is installed at the output end of the second moving seat (5). The electric valve (503) is located directly above the powder feeding trough (104). The input end of the guide pipe (506) is connected to the output end of the powder supply mechanism on the metal 3D printing body (6). The output end of the guide pipe (506) extends to the top of the feed port of the buffer box (501).

2. The powder laying device according to claim 1, characterized in that, The second translation mechanism (4) consists of a protective box installed at the top of the scraper frame (1), a threaded rod that is rotatably connected to the scraper frame (1) by a motor drive, a guide rod set below the threaded rod, and a second moving seat (5) installed between the threaded rod and the guide rod. The bottom end of the second moving seat (5) is connected to the buffer box (501).

3. The powder laying device according to claim 2, characterized in that, The stirring assembly consists of a rotating shaft (504) that is rotatably connected to the second movable seat (5) by a motor drive, and multiple sets of stirring blades (505) evenly installed on the outer circumference of the rotating shaft (504). The stirring blades (505) correspond to the inner wall of the second movable seat (5).

4. The powder laying device according to claim 1, characterized in that, The scraper holder (1) is also equipped with a limit mechanism, which includes: The mounting slot (101) is located at the bottom of the side wall of the scraper holder (1). The mounting slot (101) is equipped with a first translation mechanism (102). The first translation mechanism (102) consists of a motor installed inside the mounting slot (101) and a bidirectional threaded rod that drives the output end of the motor. And the first movable seat (103) is provided in two sets. The two sets of first movable seats (103) are driven by the first translation mechanism (102) to slide closer to or further away from the scraper frame (1) for adjustment. The bottom end of the first movable seat (103) is equipped with a limiting plate (105), and the limiting plate (105) is slidably connected to the powder distribution trough (104).

5. A metal 3D printing device, characterized in that, Includes the powder laying apparatus according to any one of claims 1 to 4.

6. The metal 3D printing equipment according to claim 5, characterized in that, The metal 3D printing body (6) has a support frame (507) at the top of the molding chamber. The other end of the support frame (507) is connected to the guide tube (506). The guide tube (506) is inclinedly set in the molding chamber through the support frame (507).

Images