Laser powder multilayer baking device

Abstract

The utility model relates to the technical field of laser powder baking, in particular to a laser powder multi-layer baking device which comprises a vacuum furnace, a plurality of supporting plates are arranged on the inner walls of the left side and the right side of the vacuum furnace, lifting trays are connected to the four corners of the top of each supporting plate in a screwed mode, and an air exhaust mechanism perpendicularly penetrates through the middle of the top wall of the vacuum furnace. A protection box is arranged outside the air exhaust mechanism, supporting bases are arranged on the left side and the right side of the outer wall of the bottom end of the vacuum furnace, and a furnace door is hinged to the outer wall of the front side of the vacuum furnace. According to the improved baking device, a vacuum environment can be rapidly formed through the air exhaust mechanism, so that powder oxidation is avoided, stable performance is guaranteed, the supporting plate and the lifting tray are matched to flexibly adjust the height of the base plate and improve the space utilization rate, the electric heating pipe is combined with the temperature sensor to accurately control the temperature and ensure uniform heating, and the furnace door can be sealed to prevent air leakage. The perspective window facilitates observation, and efficient, stable and safe multi-layer accurate baking is achieved.

Description

Technical Field

[0001] This utility model relates to the field of laser powder baking technology, specifically to a multi-layer laser powder baking device. Background Technology

[0002] Laser powder processing is a key technology in additive manufacturing. It mainly refers to the process of selectively melting metal or non-metal powders with a laser beam and then depositing them layer by layer to form parts. It includes technologies such as laser powder bed melting and laser cladding, and relies on the precise spreading of powder materials and precise energy control. Laser powder baking is a pre-treatment or post-treatment step. Pre-treatment baking removes moisture, adsorbed gases and volatiles from the powder by heating it, improving the powder's flowability and purity. It often requires temperature control in an inert atmosphere or vacuum environment.

[0003] During the design process of this utility model, the following problems were discovered in the existing technology:

[0004] Existing baking equipment has many shortcomings in the baking process. Traditional baking equipment is difficult to achieve uniform heating of multi-layer powder, resulting in differences in the material properties after powder sintering or melting, which affects the stability of product quality. Utility Model Content

[0005] The purpose of this invention is to provide a laser powder multilayer baking device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laser powder multilayer baking device, including a vacuum furnace, wherein several support plates are provided on the inner walls of the left and right sides of the vacuum furnace, and lifting trays are screwed to the top four corners of the support plates; an air extraction mechanism is vertically penetrating through the middle of the top wall of the vacuum furnace, and a protective box is provided outside the air extraction mechanism; support bases are provided on the left and right sides of the bottom outer wall of the vacuum furnace, and a furnace door is hinged to the front outer wall of the vacuum furnace.

[0007] More preferably, the vacuum furnace has several electric heating tubes installed in the interlayer of the inner walls on both sides.

[0008] More preferably, the inner walls on both sides of the vacuum furnace are provided with sliding grooves.

[0009] More preferably, the lifting tray includes four electric telescopic rods, the bottom ends of the four electric telescopic rods are respectively screwed to the top four corners of the support plate, the drive ends of the four electric telescopic rods are respectively screwed to the bottom four corners of the chassis, and sliders are provided on both the left and right sides of the chassis, with the sliders and the sliding grooves forming a sliding connection.

[0010] More preferably, a plurality of temperature sensors are embedded in the bottom wall interlayer of the chassis.

[0011] More preferably, the suction mechanism includes a suction hood, the bottom end of which is fitted into the middle of the top wall of the vacuum furnace, a suction pipe is inserted into the top end of the suction hood, a vacuum pump is inserted into the top end of the suction pipe, and an exhaust pipe is inserted into the top end of the vacuum pump.

[0012] More preferably, the front side of the furnace door is provided with several door locks, and the front center of the furnace door is fitted with a viewing window.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The vacuum environment can be quickly created by the air extraction mechanism, thereby avoiding powder oxidation and ensuring stable performance. The combination of the support plate and the lifting tray allows for flexible adjustment of the chassis height, thereby improving space utilization according to actual conditions. The electric heating tube combined with the temperature sensor can achieve precise temperature control, thereby ensuring uniform heating. At the same time, the oven door can be sealed to prevent air leakage, and the viewing window facilitates observation, achieving efficient, stable, safe, and precise multi-layer baking. Attached Figure Description

[0015] Figure 1 This is a side view sectional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the air extraction mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the lifting tray structure of this utility model.

[0019] In the diagram: 1. Vacuum furnace; 101. Electric heating element; 102. Slide rail; 2. Support plate; 3. Lifting tray; 301. Electric telescopic rod; 302. Chassis; 303. Sliding block; 4. Air extraction mechanism; 401. Suction hood; 402. Suction pipe; 403. Vacuum pump; 404. Exhaust pipe; 5. Protective box; 6. Support base; 7. Furnace door; 701. Door lock; 702. Viewing window. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4This utility model provides a technical solution: a laser powder multilayer baking device, including a vacuum furnace 1. Several support plates 2 are provided on the inner walls of the left and right sides of the vacuum furnace 1. Lifting trays 3 are screwed to the top four corners of the support plates 2. A vacuum pump 4 is vertically penetrating through the middle of the top wall of the vacuum furnace 1. A protective box 5 is provided outside the vacuum pump 4. Support bases 6 are provided on the left and right sides of the bottom outer wall of the vacuum furnace 1. A furnace door 7 is hinged to the front outer wall of the vacuum furnace 1.

[0022] In this embodiment, as Figure 1 and Figure 3 As shown, several electric heating tubes 101 are provided in the interlayer of the inner walls on both sides of the vacuum furnace 1.

[0023] In this embodiment, as Figure 1 and Figure 3 As shown, the inner walls on both the left and right sides of the vacuum furnace 1 are provided with sliding grooves 102.

[0024] In this embodiment, as Figure 2 and Figure 4 As shown, the lifting tray 3 includes four electric telescopic rods 301. The bottom ends of the four electric telescopic rods 301 are respectively screwed to the top four corners of the support plate 2. The drive ends of the four electric telescopic rods 301 are respectively screwed to the bottom four corners of the chassis 302. The left and right sides of the chassis 302 are provided with sliders 303, and the sliders 303 and the slide grooves 102 form a sliding connection.

[0025] In this embodiment, as Figure 4 As shown, several temperature sensors are embedded in the bottom wall interlayer of the chassis 302.

[0026] In this embodiment, as Figure 1 and Figure 3 As shown, the suction mechanism 4 includes a suction hood 401. The bottom end of the suction hood 401 is fitted into the middle of the top wall of the vacuum furnace 1. A suction pipe 402 is inserted into the top end of the suction hood 401. A vacuum pump 403 is inserted into the top end of the suction pipe 402. An exhaust pipe 404 is inserted into the top end of the vacuum pump 403.

[0027] In this embodiment, as Figure 2 As shown, several door locks 701 are provided on one side of the front of the furnace door 7, and a viewing window 702 is fitted into the middle of the front of the furnace door 7.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the laser powder multilayer baking device operates as follows:

[0029] When using it for the first time, the operator can first observe whether the support bases 6 on the left and right sides of the bottom outer wall of the vacuum furnace 1 are placed stably. After confirming that the device is stable, the lock can be unlocked by rotating or pulling the door lock 701. Then, the furnace door 7 can be opened outward along the hinge. At this time, the operator can select the corresponding number of lifting trays 3 according to the amount and number of layers of powder to be baked. When multiple layers of baking are required, the upper and lower lifting trays 3 can be used at the same time.

[0030] Next, the operation is performed on the lifting tray 3 on the selected support plate 2. At this time, the operator can adjust the height of the tray 302 according to the amount of baking powder to facilitate the manual placement of different amounts of powder material. Specifically, the electric telescopic rods 301 at different positions are activated to slowly extend or shorten, and drive the tray 302 to move vertically. During this process, since the sliders 303 on the left and right sides of the tray 302 are embedded in the grooves 102 on the inner wall of the vacuum furnace 1, the sliding connection between the sliders 303 and the grooves 102 can ensure that the tray 302 remains horizontal and stable when it is raised and lowered, avoiding tilting. Then, multiple sets of powder material are evenly spread on the surface of the tray 302 at the corresponding positions, and the operation is repeated to place the second and third layers of powder until all the powder material is placed.

[0031] After placement, the operator can check again whether each layer of the chassis 302 is in the predetermined position. After confirming that everything is correct, close the furnace door 7 and rotate or fasten the door lock 701 to ensure that the furnace door 7 is tightly sealed to the front outer wall of the vacuum furnace 1 to prevent air leakage. At this time, the operator can start the vacuum pump 403 in the suction mechanism 4, so that it can draw air from the vacuum furnace 1 through the suction pipe 402 and the suction hood 401 connected to it. During this period, the gas will be transported upward to the vacuum pump 403 through the suction pipe 402 and then discharged to the outside through the exhaust pipe 404. Continue to pump air until the predetermined vacuum degree is reached in the vacuum furnace 1.

[0032] Once a vacuum environment is established inside the vacuum furnace 1, the operator can turn on the electric heating tubes 101 sandwiched between the inner walls on both sides of the vacuum furnace 1. This allows the electric heating tubes 101 to heat up evenly and radiate heat into the interior of the vacuum furnace 1 through the furnace wall. At this time, the temperature sensors (PT100) embedded in the bottom wall sandwiched between each layer of the chassis 302 start working simultaneously, monitoring the surface temperature of the chassis 302 in real time and transmitting the data to the external control system. During this period, the operator can adjust the power of the electric heating tubes 101 according to the preset baking process to maintain a constant temperature after reaching the set temperature. During the baking process, the operator can observe the powder state through the viewing window 702 of the furnace door 7 to determine whether there is clumping or discoloration. At the same time, the data from the temperature sensors (PT100) ensures that the powder in each layer is heated evenly, avoiding local overheating.

[0033] Once the preset baking time is reached, turn off the electric heating tube 101 to stop heating. At this time, you can choose to let it cool naturally in a vacuum environment. After the temperature drops to a safe range, the operator can operate the door lock 701 again to unlock the oven door 7 and remove the baking powder from the surface of the chassis 302 layer by layer.

[0034] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A laser powder multilayer baking apparatus, comprising a vacuum furnace (1), characterized in that: The vacuum furnace (1) has several support plates (2) on its left and right inner walls. The support plates (2) are screwed to the four corners of the top. The vacuum furnace (1) has a vertical suction mechanism (4) running through the middle of the top wall. The suction mechanism (4) has a protective box (5) on its outside. The vacuum furnace (1) has support bases (6) on both the left and right sides of the bottom outer wall. The vacuum furnace (1) has a furnace door (7) hinged to the front outer wall.

2. The laser powder multilayer baking apparatus according to claim 1, characterized in that: Several electric heating tubes (101) are provided in the interlayer of the inner walls on both sides of the vacuum furnace (1).

3. The laser powder multilayer baking apparatus according to claim 1, characterized in that: The vacuum furnace (1) has grooves (102) on the inner walls of its left and right sides.

4. The laser powder multilayer baking apparatus according to claim 3, characterized in that: The lifting tray (3) includes four electric telescopic rods (301). The bottom ends of the four electric telescopic rods (301) are respectively screwed to the top four corners of the support plate (2). The driving ends of the four electric telescopic rods (301) are respectively screwed to the bottom four corners of the chassis (302). The chassis (302) is provided with sliders (303) on both the left and right sides. The sliders (303) and the slide grooves (102) form a sliding connection.

5. The laser powder multilayer baking apparatus according to claim 4, characterized in that: Several temperature sensors are embedded in the bottom wall interlayer of the chassis (302).

6. The laser powder multilayer baking apparatus according to claim 1, characterized in that: The suction mechanism (4) includes a suction hood (401), the bottom end of which is fitted into the middle of the top wall of the vacuum furnace (1), a suction pipe (402) is inserted into the top end of the suction hood (401), a vacuum pump (403) is inserted into the top end of the suction pipe (402), and an exhaust pipe (404) is inserted into the top end of the vacuum pump (403).

7. The laser powder multilayer baking apparatus according to claim 1, characterized in that: The furnace door (7) is provided with several door locks (701) on one side of the front, and a viewing window (702) is fitted into the middle of the front side of the furnace door (7).

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