Additive manufacturing forming bin and additive manufacturing system

Abstract

The invention discloses an additive manufacturing forming bin and an additive manufacturing system, relates to the technical field of additive manufacturing, and aims to solve the problems of long printing time and printing quality reduction caused by bin opening and cleaning in order to avoid attenuation of laser effective power caused by pollution in the printing process. The additive manufacturing forming bin comprises a forming bin body, a light-transmitting component, a light-transmitting protective film assembly and a mechanical arm. Wherein the forming bin body comprises a bottom plate, a side wall and a top plate, the bottom plate and the top plate are fixedly arranged at the upper end and the lower end of the side wall correspondingly to form a sealed space, and a first through hole is formed in the top plate; the light-transmitting component is embedded in the first through hole in a sealing manner and is used for transmitting laser above the forming bin body; the light-transmitting protective film assembly is located in the sealed space, the light-transmitting protective film assembly comprises a plurality of layers of light-transmitting protective films which are stacked and can be detached from one another, and the light-transmitting protective film assembly detachably covers the lower surface of the light-transmitting component; the mechanical arm is fixedly arranged in the forming bin body and used for disassembling the light-transmitting protective film.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to an additive manufacturing forming bin and an additive manufacturing system. Background Art

[0002] In laser selective sintering equipment, the laser light source is generally placed above the forming chamber, and a light-transmitting component is provided between the light source and the forming chamber. The light-transmitting component plays a sealing and protective role for the laser system while ensuring that the laser can be normally transmitted and used.

[0003] During the printing process, splashing of the molten pool and the generation of black slag are inevitable, which will cause the splashing black slag to adhere to the light-transmitting parts, resulting in the attenuation of the effective power of the laser penetrating the light-transmitting parts and scanning on the parts. Especially for large-size parts that are printed for a long time, the continuous accumulation of pollutants will inevitably cause contamination of the light-transmitting parts, seriously affecting the metallurgical quality and forming size of the product.

[0004] At present, in order to avoid the attenuation of laser effective power due to contamination during the printing process, the existing forming equipment needs to open the forming chamber at intervals to clean the light-transmitting parts. The printing process of the parts will be interrupted each time the cleaning process is completed to resume printing. This process not only prolongs the printing time and reduces production efficiency, but also the interruption of the continuity of the part printing process will affect the printing quality of the parts. Summary of the invention

[0005] The object of the present invention is to provide an additive manufacturing forming chamber and an additive manufacturing system, which are used to avoid opening the chamber to clean the light-transmitting parts to ensure the effective power of the laser, shorten the printing time, and improve the printing quality of the parts.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides an additive manufacturing forming chamber, comprising:

[0008] The forming bin body comprises a bottom plate, a side wall and a top plate, the bottom plate and the top plate are respectively fixedly arranged at the upper and lower ends of the side wall to form a sealed space, and a first through hole is arranged on the top plate;

[0009] A light-transmitting component, which is sealed and embedded in the first through hole and is used to transmit the laser above the forming chamber body;

[0010] A light-transmitting protective film assembly is located in the sealed space, the light-transmitting protective film assembly includes multiple layers of light-transmitting protective films that are stacked and detachable from each other, and the light-transmitting protective film assembly detachably covers the lower surface of the light-transmitting component;

[0011] The manipulator is fixedly arranged inside the forming chamber body and is used for removing the light-transmitting protective film.

[0012] Optionally, in the above-mentioned additive manufacturing forming chamber, the light-transmitting protective film assembly is adhesively connected to the lower surface of the light-transmitting component, and the multiple layers of light-transmitting protective films are detachably connected by adhesive.

[0013] Optionally, in the above-mentioned additive manufacturing forming chamber, each layer of light-transmitting protective film has a folded edge bent downward, and an adhesive connection point is provided between the bottom surface of the folded edge of the upper light-transmitting protective film and the top surface of the lower light-transmitting protective film.

[0014] Optionally, in the above-mentioned additive manufacturing forming chamber, each layer of light-transmitting protective film has a folded edge bent downward, and the light-transmitting protective film also includes multiple snap structures, the snap structures include male snaps and female snaps, one of the male snaps and the female snaps is fixedly arranged on the bottom surface of the folded edge of the upper light-transmitting protective film, and the other of the male snaps and the female snaps is fixedly arranged on the top surface of the lower light-transmitting protective film.

[0015] Optionally, in the above-mentioned additive manufacturing forming chamber, the manipulator includes:

[0016] The robot body is fixed in the forming chamber body;

[0017] A clamping claw is arranged at one end of the manipulator body and is used to clamp the light-transmitting protective film;

[0018] The controller is arranged on the manipulator body, and is in communication connection with the manipulator body and the clamping claw, and is used for controlling the movement of the manipulator body and the clamping claw.

[0019] Optionally, in the above-mentioned additive manufacturing forming chamber, the additive manufacturing forming chamber further includes a storage chamber, which is fixedly arranged inside the forming chamber body and is used to store the disassembled light-transmitting protective film.

[0020] Optionally, in the above-mentioned additive manufacturing forming chamber, a second through hole is further provided on the side wall of the forming chamber body, and the second through hole is used for external airflow to provide wind field protection for the light-transmitting component.

[0021] Optionally, in the above-mentioned additive manufacturing forming chamber, the material of the light-transmitting protective film includes silicon nitride.

[0022] Optionally, in the above-mentioned additive manufacturing forming chamber, the light transmittance of the light-transmitting protective film is greater than or equal to 90%.

[0023] Compared with the prior art, the additive manufacturing forming chamber provided by the present invention has a manipulator fixedly arranged in the forming chamber body, and at the same time, a light-transmitting protective film assembly is covered on the lower surface of the light-transmitting component, and the assembly is composed of multiple layers of stacked and detachable light-transmitting protective films. In the process of additive manufacturing, when the light-transmitting protective film is contaminated by impurities such as splashes, there is no need to open the forming chamber body. The manipulator can operate directly in the forming chamber body to tear off the contaminated lower layer of light-transmitting protective film to expose the uncontaminated upper layer of protective film. By covering the light-transmitting component with multiple layers of light-transmitting protective film and tearing off the contaminated light-transmitting protective film layer by layer by the manipulator, it is possible to ensure that the effective power of the laser is not attenuated without opening the chamber, which not only avoids the problem of reduced printing quality due to opening the chamber for cleaning, but also reduces the printing time cost, and improves the efficiency and quality of additive manufacturing.

[0024] In a second aspect, the present invention further provides an additive manufacturing system, the system comprising:

[0025] An additive manufacturing forming chamber provided in the first aspect;

[0026] The laser system is arranged above the forming chamber body and is used to emit laser that can pass through the light-transmitting component.

[0027] Compared with the prior art, the beneficial effects achieved by the additive manufacturing system provided by the second aspect are the same as those of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic diagram of the overall structure of an additive manufacturing forming bin provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of stacking of a light-transmitting protective film assembly of an additive manufacturing forming chamber provided by an embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a light-transmitting protective film assembly for an additive manufacturing forming chamber provided in an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1 is a forming bin body, 110 is a first through hole, 120 is a second through hole, 2 is a light-transmitting component, 3 is a light-transmitting protective film assembly, 310 is a light-transmitting protective film, 311 is a folding edge, 320 is a snap structure, 321 is a male buckle, 322 is a female buckle, 4 is a manipulator, 410 is a manipulator body, 411 is a clamp, 5 is a storage bin, and 6 is a laser system. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1The additive manufacturing forming chamber provided by the embodiment of the present invention includes: a forming chamber body 1, a light-transmitting component 2, a light-transmitting protective film assembly 3 and a manipulator 4; wherein the forming chamber body 1 includes a bottom plate, a side wall and a top plate, the bottom plate and the top plate are respectively fixedly arranged at the upper and lower ends of the side wall to form a sealed space, and a first through hole 110 is provided on the top plate; the light-transmitting component 2 is sealed and embedded in the first through hole 110, and is used to pass the laser above the forming chamber body 1; the light-transmitting protective film assembly 3 is located in the sealed space, and the light-transmitting protective film assembly 3 includes a plurality of light-transmitting protective films 310 stacked and detachable from each other, and the light-transmitting protective film assembly 3 is detachably covered on the lower surface of the light-transmitting component 2; the manipulator 4 is fixedly arranged inside the forming chamber body 1, and is used to remove the light-transmitting protective film 310.

[0040] In specific implementation: during the additive manufacturing process, when the light-transmitting protective film 310 is contaminated by impurities such as splashes, there is no need to open the forming chamber body 1. The manipulator 4 can directly operate in the forming chamber body 1 to tear off the contaminated lower light-transmitting protective film 310 to expose the uncontaminated upper light-transmitting protective film 310. By covering the light-transmitting component 2 with multiple layers of light-transmitting protective film 310 and using the manipulator 4 to tear off the contaminated light-transmitting protective film 310 layer by layer, it is possible to ensure that the effective power of the laser is not attenuated without opening the chamber for cleaning, thereby avoiding the problem of reduced printing quality due to opening the chamber for cleaning, reducing the printing time cost, and improving the efficiency and quality of additive manufacturing.

[0041] As a possible implementation, Figure 1 As shown, the light-transmitting protective film assembly 3 is adhesively connected to the lower surface of the light-transmitting component 2, and the multiple layers of light-transmitting protective films 310 are detachably connected by adhesive.

[0042] Specifically, the entire light-transmitting protective film assembly 3 is connected to the lower surface of the light-transmitting component 2 by gluing, and the multiple layers of light-transmitting protective films 310 are also connected by gluing, and this gluing connection is detachable, which means that they can be separated by certain means when needed. Through the gluing connection, the light-transmitting protective film assembly 3 can be firmly connected to the lower surface of the light-transmitting component 2, thereby preventing the light-transmitting protective film assembly 3 from falling off or shifting due to factors such as vibration and airflow disturbance during normal use, thereby affecting the protective effect of the light-transmitting component 2. Moreover, the gluing and detachable connection between the multiple layers of light-transmitting protective films 310 can be easily disassembled when one or more layers of contaminated or damaged light-transmitting protective films 310 need to be replaced, thereby reducing the difficulty of operation. At the same time, the adhesive connection can form a good sealing effect between the multi-layer light-transmitting protective film 310, preventing the entry of external dust, splashes and other impurities, helping to ensure the cleanliness and stability of the light-transmitting protective film assembly 3. In addition, when an adhesive with high transparency and low refractive index is selected, it can be ensured that the light-transmitting protective film 310 will not affect the effect of light passing through the light-transmitting component 2 and the light-transmitting protective film assembly 3 after connection, thereby ensuring its good optical properties.

[0043] In some embodiments, a small magnetic material is embedded at the edge of each light-transmitting protective film 310 or other suitable position. Specifically, a magnetic sheet can be embedded at the edge of the top surface of the lower film, and a magnetic sheet with opposite magnetic poles can be embedded at the corresponding position of the upper film. The upper and lower films are automatically adsorbed together by the mutual attraction of the magnetic poles to achieve a detachable connection. When disassembling, the manipulator 4 only needs to apply a pulling force sufficient to overcome the magnetic force to separate the upper and lower films.

[0044] As a possible implementation, Figure 2 As shown, each layer of light-transmitting protective film 310 has a folded edge 311 bent downward, and the bottom surface of the folded edge 311 of the upper light-transmitting protective film 310 is adhesively connected to the top surface of the lower light-transmitting protective film 310 .

[0045] That is, each layer of light-transmitting protective film 310 is designed to have an edge portion that is bent downward to form a folded edge 311, and adhesive is coated on the non-folded edge 311 portion of the main body of each layer of light-transmitting film and the bottom surface of the folded edge 311 portion. When constructing the light-transmitting protective film assembly 3, the upper light-transmitting protective film 310 is placed above the lower light-transmitting protective film 310, and the layers are stacked so that the folded edge 311 of the upper film fits the top surface of the lower film. At this time, the adhesive of the non-folded edge 311 portion of the upper film fits tightly with the corresponding portion of the lower light-transmitting protective film 310. At the same time, the adhesive on the bottom surface of the upper folded edge 311 is also adhesively connected to the top surface of the lower light-transmitting protective film 310. In this way, through the action of the adhesive at multiple locations, the upper and lower films are firmly connected as a whole, thereby constructing a multi-layer film stacking structure.

[0046] In specific implementation, when it is necessary to replace the light-transmitting protective film 310, the manipulator 4 moves accurately to the target position according to the preset instructions, and can accurately identify and locate the folded edge 311 of the bottom light-transmitting protective film 310. Since the folded edge 311 has a relatively protruding structural feature, the manipulator 4 can firmly grasp the folded edge 311. Then, the manipulator 4 applies appropriate pulling force to overcome the adhesion force generated by the adhesive at each connection part, so as to completely remove the bottom light-transmitting protective film 310 from the stacked structure. When the bottom light-transmitting protective film 310 is removed, the folded edge 311 of the light-transmitting protective film 310 originally on the upper layer naturally protrudes relatively due to the absence of the lower film layer. At this time, the manipulator 4 can accurately locate the folded edge 311 again, and repeat the above-mentioned grasping and removal actions. In this way, the contaminated light-transmitting protective films 310 can be removed one by one.

[0047] In this way, the folded edge 311 serves as a clear and protruding grasping target, which helps the manipulator 4 to quickly and accurately locate the target single-layer film, thereby improving the accuracy and efficiency of the disassembly process. At the same time, the design of the folded edge 311 can ensure that the manipulator 4 accurately grasps the bottom light-transmitting protective film 310, and when overcoming the adhesive force to tear off the film, it will not affect other film layers that have not yet reached the replacement period, ensuring that each replacement operation is only performed on the single-layer film that needs to be replaced, avoiding unnecessary material waste, and further improving the accuracy and economy of maintenance.

[0048] As a possible implementation, Figure 2 and Figure 3 As shown, each layer of the light-transmitting protective film 310 has a downwardly bent edge 311, and the light-transmitting protective film 310 also includes a plurality of snap structures 320, the snap structures 320 include a male snap 321 and a female snap 322, one of the male snap 321 and the female snap 322 is fixedly arranged on the bottom surface of the folded edge 311 of the upper light-transmitting protective film 310, and the other of the male snap 321 and the female snap 322 is fixedly arranged on the top surface of the lower light-transmitting protective film 310.

[0049] Specifically, during the manufacturing process of each layer of the light-transmitting protective film 310, its edge portion is designed to be in the shape of a folded edge 311 that is bent downward. At the same time, a snap-on structure 320 is provided, and a male snap 321 and a female snap 322 are respectively fixedly arranged on two adjacent layers of the light-transmitting protective film 310. Among them, the male snap 321 is fixed to the bottom surface of the folded edge 311 of the upper light-transmitting protective film 310, and the female snap 322 is correspondingly fixed to the top surface of the lower light-transmitting protective film 310, or, the female snap 322 is fixed to the bottom surface of the folded edge 311 of the upper light-transmitting protective film 310, and the male snap 321 is correspondingly fixed to the top surface of the lower light-transmitting protective film 310. When assembling the light-transmitting protective film assembly 3, the folded edge 311 of the upper light-transmitting protective film 310 is attached to the top surface of the lower light-transmitting protective film 310, the male buckle 321 and the female buckle 322 are aligned with each other, and appropriate pressure is applied to make the male buckle 321 and the female buckle 322 engage with each other, thereby realizing the connection between the upper and lower light-transmitting protective films 310. In this way, they are connected layer by layer to assemble a complete light-transmitting protective film assembly 3.

[0050] With such a configuration, the buckle structure 320 provides a reliable connection method. Compared with other connection methods, the close fit between the male buckle 321 and the female buckle 322 can withstand a certain degree of external force and other factors, further improving the stability of the connection between the multi-layer light-transmitting protective film 310, ensuring that the multi-layer light-transmitting protective film 310 always maintains a stable connection state during use, and effectively preventing loosening between the film layers. At the same time, it facilitates the installation and disassembly operations of the light-transmitting protective film assembly 3, and provides a positioning function between the layers of film. During installation, you only need to align the male buckle 321 with the female buckle 322 and press it, which can ensure that the relative position between the two layers of film is determined, and quickly complete the connection, improve assembly efficiency, and save time and labor costs.

[0051] As a possible implementation, Figure 1 As shown, the manipulator 4 includes a manipulator body 410, a clamp 411 and a controller; wherein the manipulator body 410 is fixed in the forming bin body 1; the clamp 411 is arranged at one end of the manipulator body 410, and is used to clamp the light-transmitting protective film 310; the controller is arranged on the manipulator body 410, and the controller is communicated with the manipulator body 410 and the clamp 411, and is used to control the movement of the manipulator body 410 and the clamp 411.

[0052] In specific implementation, when it is necessary to operate the light-transmitting protective film 310, the controller sends the corresponding control signal to the manipulator body 410 and the clamping jaw 411 according to the preset program and algorithm, accurately controls the motion trajectory of the manipulator body 410, and moves it to a predetermined position, so that the clamping jaw 411 is accurately close to the target light-transmitting protective film 310. At the same time, the controller can also control the opening and closing action of the clamping jaw 411. When the clamping jaw 411 reaches the position of the target light-transmitting protective film 310, the clamping jaw 411 opens and closes as needed to grasp the light-transmitting protective film 310. After completing the clamping operation, the controller can control the manipulator body 410 to move the clamped light-transmitting protective film 310 to the recycling area, and control the manipulator body 410 to become a folded state to save space. With such arrangement, when disassembling the multi-layer light-transmitting protective film 310, the controller can control the movement of the robot body 410 and the clamp 411, so that the clamp 411 sequentially clamps and removes the contaminated light-transmitting protective film 310 that needs to be replaced, while ensuring the continuity and accuracy of the operation.

[0053] As a possible implementation, Figure 1 As shown, the additive manufacturing forming chamber also includes a storage chamber 5, which is fixedly arranged inside the forming chamber body 1 and is used to store the disassembled light-transmitting protective film 310.

[0054] A storage bin 5 is fixedly arranged in the additive manufacturing forming bin, and is fixedly installed in the enclosed space of the forming bin body 1 by welding, bolt connection or other means. The installation position should ensure that it will not affect the normal operation of other components, and it should be convenient to receive and store the light-transmitting protective film 310 removed from the light-transmitting component 2 by the manipulator 4. The opening direction and size of the storage bin 5 are compatible with the manipulator 4, so that the manipulator 4 can easily place the light-transmitting protective film 310 into the storage bin 5 after removing it. In this way, the storage bin 5 is arranged inside the forming bin body 1. When the light-transmitting protective film 310 needs to be replaced, the manipulator 4 can conveniently and quickly temporarily store the removed light-transmitting protective film 310 into the internal storage bin 5. After the additive manufacturing process is completed, it is convenient to centrally handle the contaminated light-transmitting protective film 310.

[0055] As a possible implementation, Figure 1 As shown, the side wall of the forming chamber body is further provided with a second through hole 120 , and the second through hole 120 is used for external airflow to provide wind field protection for the light-transmitting component 2 .

[0056] In specific implementation, a second through hole 120 is opened on the side wall of the forming chamber body, and the second through hole 120 is connected to the external airflow supply device to form a complete airflow channel. When the external airflow supply device is started, the airflow can enter the inside of the forming chamber body through the second through hole 120 and directly act on the bottom of the transparent protective film assembly 3. In this way, various tiny particles, splashes and other impurities will be generated during the additive manufacturing process. If these impurities adhere to the transparent protective film assembly 3, they will gradually accumulate and reduce the transmittance of the transparent protective film assembly 3, affecting the effective power of the laser. The airflow introduced through the second through hole 120 forms a wind field on the surface of the transparent protective film assembly 3, which can effectively blow these impurities away from the transparent protective film assembly 3 and prevent impurities from depositing, thereby ensuring the cleanliness of the transparent protective film assembly 3, ensuring that the laser can be continuously and stably transmitted, and maintaining high precision and stability in the additive manufacturing process. At the same time, during the additive manufacturing process, the laser irradiates the transparent component 2 and the transparent protective film assembly 3 for a long time, which will increase their temperature. Excessive temperature will affect their optical properties and service life. The wind field formed by the external airflow through the second through hole 120 can take away the heat on the light-transmitting component 2 and the light-transmitting protective film assembly 3 to a certain extent, play a role in cooling and heat dissipation, so that the temperature of the light-transmitting component 2 and the light-transmitting protective film assembly 3 is within an appropriate range, thereby improving the stability and service life of the equipment.

[0057] As a possible implementation method, the material of the light-transmitting protective film 310 includes silicon nitride. Silicon nitride is selected as the material of the light-transmitting protective film 310. Silicon nitride can resist the corrosion of chemical substances that may occur during the additive manufacturing process. The silicon nitride protective film is not easy to react chemically with splashed substances, which can effectively prevent chemical corrosion and extend its service life. In addition, the silicon nitride material has good high-temperature resistance. During the additive manufacturing process, when a high-energy laser is used, a large amount of heat will be generated on the light-transmitting protective film assembly 3. Silicon nitride can withstand higher temperatures and will not be deformed or damaged due to high temperatures, resulting in its performance being impaired.

[0058] In some embodiments, the material of the light-transmitting protective film 310 can be aluminum oxide, silicon carbide or boron nitride, etc. As the material of the light-transmitting protective film 310, these materials meet relatively stable chemical stability, can resist corrosion from common chemicals in the additive manufacturing process, and at the same time have good high temperature resistance.

[0059] Furthermore, the light transmittance of the light-transmitting protective film 310 is greater than or equal to 90%. In the process of additive manufacturing, the light-transmitting protective film with high light transmittance can ensure that the laser beam passes through with high energy efficiency, reduce the energy loss of the laser beam, and improve production efficiency.

[0060] The present invention also provides an additive manufacturing system, such as Figure 1As shown, it includes an additive manufacturing forming chamber and a laser system 6 provided in the first aspect; the laser system 6 is arranged above the forming chamber body 1 and is used to emit a laser that can pass through the light-transmitting component 2.

[0061] Compared with the prior art, the specific implementation of the additive manufacturing system is as described in the above-mentioned additive manufacturing forming chamber, and will not be repeated here.

[0062] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An additive manufacturing forming chamber, characterized in that: include: A forming bin body, the forming bin body comprising a bottom plate, a side wall and a top plate, the bottom plate and the top plate are respectively fixedly arranged at the upper and lower ends of the side wall to form a sealed space, and a first through hole is arranged on the top plate; A light-transmitting component, the light-transmitting component is sealed and embedded in the first through hole, and is used for transmitting the laser above the forming chamber body; A light-transmitting protective film assembly, the light-transmitting protective film assembly is located in the sealed space, the light-transmitting protective film assembly comprises a plurality of light-transmitting protective films stacked and detachable from each other, and the light-transmitting protective film assembly detachably covers the lower surface of the light-transmitting component; A robot arm is fixedly arranged inside the forming chamber body and is used for removing the light-transmitting protective film.

2. The additive manufacturing forming chamber according to claim 1, characterized in that: The light-transmitting protective film assembly is adhesively connected to the lower surface of the light-transmitting component, and the multiple layers of light-transmitting protective films are detachably connected by adhesive.

3. The additive manufacturing forming chamber according to claim 2, characterized in that: Each layer of the light-transmitting protective film has a folded edge bent downward, and the bottom surface of the folded edge of the upper light-transmitting protective film is adhesively connected to the top surface of the lower light-transmitting protective film.

4. The additive manufacturing forming chamber according to claim 1, characterized in that: Each layer of the light-transmitting protective film has a folded edge bent downward, and the light-transmitting protective film also includes a plurality of snap structures, the snap structures including a male snap and a female snap, one of the male snap and the female snap is fixedly arranged on the bottom surface of the folded edge of the upper layer of the light-transmitting protective film, and the other of the male snap and the female snap is fixedly arranged on the top surface of the lower layer of the light-transmitting protective film.

5. The additive manufacturing forming chamber according to claim 1, characterized in that: The manipulator comprises: A robot body, wherein the robot body is fixedly arranged in the forming chamber body; A clamping claw, which is arranged at one end of the manipulator body and is used to clamp the light-transmitting protective film; A controller is disposed on the manipulator body, and the controller is communicatively connected with the manipulator body and the clamping claw, and is used for controlling the movement of the manipulator body and the clamping claw.

6. The additive manufacturing forming chamber according to claim 1, characterized in that: The additive manufacturing forming chamber also includes a storage chamber, which is fixedly arranged inside the forming chamber body and is used to store the disassembled light-transmitting protective film.

7. The additive manufacturing forming chamber according to claim 1, characterized in that: The side wall of the forming bin body is also provided with a second through hole, and the second through hole is used for external airflow to provide wind field protection for the light-transmitting component.

8. The additive manufacturing forming chamber according to claim 1, characterized in that: The material of the light-transmitting protective film includes silicon nitride.

9. The additive manufacturing forming chamber according to claim 1, characterized in that: The light transmittance of the light-transmitting protective film is greater than or equal to 90%.

10. An additive manufacturing system, characterized in that: include: The additive manufacturing forming chamber according to any one of claims 1 to 9; A laser system is disposed above the forming chamber body and is used for emitting a laser that can pass through the light-transmitting component.

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