Additive manufacturing powder recycling system and method

Abstract

The present application relates to the technical field of metal additive manufacturing, and particularly relates to an additive manufacturing powder recycling system and a recycling method. The additive manufacturing powder recycling system comprises a forming cylinder, a cleaning device, a recycling device, a detection device and a control device. The forming cylinder comprises a cylinder body and a base plate, and the base plate carries a formed part. The cleaning device comprises a driving mechanism and a powder cleaning mechanism, and the driving mechanism can drive the powder cleaning mechanism to move linearly and / or rotate in a three-dimensional space. The detection device comprises an image acquisition mechanism, which can acquire image information of the powder to be cleaned. The control device can plan a powder cleaning path according to the image information, and control the driving mechanism to drive the powder cleaning mechanism to move according to the powder cleaning path, so as to suck the powder to be cleaned and make it enter the recycling device. The recycling system can realize automatic cleaning and recycling of the powder, reduce the workload of the operator, and prevent the operator from directly contacting the metal powder for a long time, so as to avoid damage to the health.

Description

Technical Field

[0001] This invention relates to the field of metal additive manufacturing technology, and in particular to an additive manufacturing powder recovery system and method. Background Technology

[0002] Additive manufacturing, also known as 3D printing, is a manufacturing technology based on the principle of discrete deposition, which forms parts by layering raw material powder. Selective Laser Melting (SLM) is a type of additive manufacturing technology. This technology forms parts by layering powder into a powder bed and scanning each layer with a laser. It has a very high degree of freedom in forming and can form parts with almost any complex structure, especially parts with complex internal cavities. After forming, the parts only require simple post-processing before they can be used, which can significantly shorten the processing cycle.

[0003] Parts formed using SLM (Surface Mount Technology) often retain a large amount of unmelted metal powder on their surface, inner cavity, and surrounding area. This powder needs to be cleaned and recycled to reduce production costs. In related technologies, manual cleaning is commonly used, where operators use a high-speed airflow to purge the part area for an extended period, using the high-speed airflow to peel off and recycle the powder. However, this cleaning method typically has the following problems: 1) The high-speed airflow used as the purging gas source is usually compressed air or nitrogen. Compressed air contains oxygen, which, after prolonged purging, increases the oxygen content on the metal powder surface. Nitrogen, under the conditions of localized temperature rise caused by the impact and friction of the high-speed airflow, easily reacts with some of the metal powder, forming a nitride layer on the powder surface. This results in poor mechanical properties of the formed parts made from the recycled metal powder. 2) Prolonged use of high-speed airflow can cause localized temperature increases in the part, further altering the material properties of the residual metal powder and, in severe cases, adversely affecting the physical properties of the formed part itself. 3) The workload for operators is significant, the powder cleaning efficiency is low, labor costs are high, and prolonged direct contact with metal powder can easily cause some degree of harm to the operators' health.

[0004] Therefore, there is an urgent need for an additive manufacturing powder recovery system and method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an additive manufacturing powder recovery system and method that can automatically clean and recover residual powder on the surface, inner cavity and surrounding area of ​​the formed part, prevent metal powder from being oxidized or nitrided due to prolonged blowing, reduce the workload of operators, improve powder cleaning efficiency, reduce labor costs, and prevent operators from being directly exposed to metal powder for a long time, thus preventing damage to their health.

[0006] To achieve this objective, the present invention adopts the following technical solution: An additive manufacturing powder recycling system, comprising: A forming cylinder includes a cylinder body and a base plate disposed in the cylinder body, wherein a formed part is supported on the base plate; A cleaning device includes a drive mechanism and a powder cleaning mechanism. The powder cleaning mechanism includes a negative pressure adsorption pipeline and a powder suction head connected to the inlet end of the negative pressure adsorption pipeline. The powder cleaning mechanism is connected to the output end of the drive mechanism. The drive mechanism can drive the powder cleaning mechanism to move linearly and / or rotate in three-dimensional space. A recovery device, wherein the inlet of the recovery device is connected to the outlet end of the negative pressure adsorption pipeline; The detection device includes an image acquisition mechanism, which is capable of acquiring image information of the powder to be cleaned on the substrate and the component. The control device is communicatively connected to both the drive mechanism and the image acquisition mechanism. The control device can plan the powder cleaning path based on the image information and the characteristics of the part, and control the drive mechanism to drive the powder cleaning mechanism to move according to the powder cleaning path, so that the powder suction head sucks up the powder to be cleaned and the powder to be cleaned passes through the powder suction head and the negative pressure adsorption pipeline in sequence before entering the recycling device.

[0007] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the control device includes: The data processing unit is used to receive image information acquired by the image acquisition mechanism and generate a distribution map of the powder to be cleaned. The path planning unit is communicatively connected to the data processing unit, and the path planning unit can plan the powder cleaning path according to the powder distribution map to be cleaned.

[0008] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the powder cleaning mechanism further includes: The cleaning brush and the rotary drive are provided. The rotary drive is disposed on the periphery of the dust suction head, and the output end of the rotary drive is connected to the cleaning brush to drive the cleaning brush to rotate, thereby blowing away the powder to be cleaned in the area to be cleaned. And / or, an air blowing head is disposed on the periphery of the powder suction head, the air blowing head being connected to an external air source to blow high-pressure airflow onto the area to be cleaned.

[0009] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the cleaning device further includes: A pressure detection element is disposed on the powder suction head, and the detection end of the pressure detection element extends into the inside of the powder suction head to detect the pressure value of the sealed space formed between the powder suction head and the surface it is in contact with. The pressure detection element is communicatively connected to the control device.

[0010] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the recovery device includes: The filtration mechanism includes a filter housing and several filter screens. The top of the filter housing is connected to the outlet end of the negative pressure adsorption pipeline. Each filter screen is arranged in the filter housing at intervals along the vertical direction, dividing the filter housing into several filter chambers. From top to bottom, the pore size of each filter screen gradually decreases. A recycling container is connected to each of the filter chambers.

[0011] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, each of the filter chambers corresponds to at least two recovery containers, and each recovery container is connected to the corresponding filter chamber through an independent first distribution pipeline, and each of the first distribution pipelines is provided with a first switching valve, which is communicatively connected to the control device.

[0012] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the detection device further includes: A powder composition analyzer is used to obtain the composition of the powder to be cleaned in the cylinder, and the powder composition analyzer is communicatively connected to the control device.

[0013] As a preferred embodiment of the additive manufacturing powder recovery system provided by the present invention, the recovery device further includes a waste powder container and a second distribution pipeline. The waste powder container is connected to the negative pressure adsorption pipeline through the second distribution pipeline, and a second switching valve is provided on the second distribution pipeline. The detection device also includes a humidity detector, which is used to obtain the humidity value of the powder to be cleaned in the cylinder. The humidity detector and the second switching valve are both connected to the control device. When the humidity value obtained by the humidity detector is greater than the preset humidity value, the control device controls the second switching valve to open.

[0014] The present invention also provides a method for recycling additive manufacturing powder, based on the additive manufacturing powder recycling system described above, comprising the following steps: Step S1: The image acquisition mechanism acquires image information of the powder to be cleaned on the substrate and parts; Step S2: The control device plans the powder cleaning path based on the image information and part features; Step S3: The control device controls the drive mechanism to drive the cleaning mechanism to move along the cleaning path, so that the suction head sucks up the powder to be cleaned and the powder to be cleaned passes through the suction head and the negative pressure adsorption pipeline in sequence before entering the recycling device.

[0015] As a preferred embodiment of the additive manufacturing powder recycling method provided by the present invention, the recycling device includes a recycling container and a waste powder container; The detection device also includes a humidity detection element, which is used to obtain the humidity value of the powder to be cleaned in the cylinder. The additive manufacturing powder recovery method further includes: Step S3': The humidity detection device acquires the humidity value of the powder to be cleaned in the cylinder; if the humidity value is greater than the preset humidity value, then proceed to step S31'; if the humidity value is less than or equal to the preset humidity value, then proceed to step S32'. S31': The control device controls the connection between the negative pressure adsorption pipeline and the waste powder container; S32': The control device controls the connection between the negative pressure adsorption pipeline and the recovery container.

[0016] The beneficial effects of this invention are: The additive manufacturing powder recovery system provided by this invention allows the image acquisition mechanism of the detection device to acquire image information of the powder to be cleaned on the substrate and the formed part after the part printing is completed. The control device then plans the powder cleaning path based on the image information and controls the drive mechanism to drive the powder cleaning mechanism to move along the cleaning path. This allows the powder suction head to draw in the powder to be cleaned and pass through the suction head and negative pressure adsorption pipeline in sequence before entering the recovery device. This achieves automated cleaning of the powder, reducing the workload of operators, improving cleaning efficiency, and lowering labor costs. It also prevents operators from being harmed by prolonged direct contact with metal powder. This cleaning method optimizes the movement trajectory of the powder cleaning mechanism, reducing its ineffective back-and-forth movement within the already cleaned area, effectively shortening the overall cleaning time, improving cleaning efficiency, and enabling longer cleaning operations in areas with a large accumulation of metal powder, thus improving the cleaning effect.

[0017] The additive manufacturing powder recovery method provided by this invention, based on the above-mentioned additive manufacturing powder recovery system, can realize the automated cleaning and recovery of residual powder on the surface, inner cavity and surrounding area of ​​the formed part, prevent the metal powder from being oxidized or nitrided due to prolonged blowing, reduce the workload of operators, improve the powder cleaning efficiency, reduce labor costs, and at the same time prevent operators from being directly exposed to metal powder for a long time, which could cause damage to their health. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the additive manufacturing powder recovery system provided in Embodiment 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the powder cleaning mechanism provided in Embodiment 1 of the present invention.

[0020] Figure 3 This is a schematic diagram of the recycling device and screening device provided in Embodiment 1 of the present invention.

[0021] Figure 4 This is a flowchart of the additive manufacturing powder recovery method provided in Embodiment 2 of the present invention.

[0022] In the picture: 100. Parts; 10. Forming cylinder; 11. Cylinder body; 12. Base plate; 13. Lifting mechanism; 20. Cleaning device; 21. Drive mechanism; 22. Powder cleaning mechanism; 221. Negative pressure adsorption pipeline; 2211. Connecting pipeline; 2212. Vacuum pump; 222. Powder suction head; 223. Powder cleaning brush; 224. Rotary drive component; 225. Air blowing head; 23. Pressure detection component; 30. Recycling device; 31. Filtration mechanism; 311. Filter housing; 3110. Filter chamber; 3111. Primary filtration chamber; 3112. Secondary filtration chamber; 3113. Tertiary filtration chamber; 312. Filter screen; 3121. Primary screen; 3122. Secondary screen; 3123. Tertiary screen; 32. Recycling container; 321. Primary recycling container; 322. Secondary recycling container; 323. Tertiary recycling container; 33. First distribution pipeline; 34. First vibration mechanism; 35. Second vibration mechanism; 36. Electronic tag; 37. Weight sensor; 40. Detection device; 41. Image acquisition mechanism; 42. Powder composition analyzer; 43. Humidity detection device; 44. Powder concentration detection device; 50. Control device; 51. Data processing unit; 52. Path planning unit; 60. Information interaction device; 70. Clean the cavity. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Example 1 like Figures 1-2 As shown, this embodiment provides an additive manufacturing powder recovery system. The system includes a forming cylinder 10, a cleaning device 20, a recovery device 30, a detection device 40, and a control device 50. The forming cylinder 10 includes a cylinder body 11 and a substrate 12 disposed within the cylinder body 11. The substrate 12 carries a formed part 100. The cleaning device 20 includes a drive mechanism 21 and a powder cleaning mechanism 22. The powder cleaning mechanism 22 includes a negative pressure adsorption pipe 221 and a powder suction head 222 connected to the inlet end of the negative pressure adsorption pipe 221. The powder cleaning mechanism 22 is connected to the output end of the drive mechanism 21, and the drive mechanism 21 can drive the powder cleaning mechanism 22 to move linearly in three-dimensional space. / or rotate; the inlet of the recovery device 30 is connected to the outlet of the negative pressure adsorption pipeline 221; the detection device 40 includes an image acquisition mechanism 41, which can acquire image information of the powder to be cleaned on the substrate 12 and the part 100; the control device 50 is communicatively connected to both the drive mechanism 21 and the image acquisition mechanism 41, and the control device 50 can plan the powder cleaning path according to the image information and the characteristics of the part 100, and control the drive mechanism 21 to drive the powder cleaning mechanism 22 to move according to the powder cleaning path, so that the powder suction head 222 sucks up the powder to be cleaned and the powder to be cleaned passes through the powder suction head 222 and the negative pressure adsorption pipeline 221 in sequence before entering the recovery device 30.

[0027] It should be noted that the features of part 100 include, but are not limited to, the outline information, the size information, the location of the holes and slots, and the size of the holes and slots.

[0028] The additive manufacturing powder recovery system provided in this embodiment allows the image acquisition mechanism 41 of the detection device 40 to acquire image information of the powder to be cleaned on the substrate 12 and the formed part 100 after the part printing is completed. The control device 50 then plans the powder cleaning path based on the image information and controls the drive mechanism 21 to drive the powder cleaning mechanism 22 to move along the powder cleaning path. This allows the suction head 222 to draw in the powder to be cleaned and pass through the suction head 222 and the negative pressure adsorption pipe 221 in sequence before entering the recovery device 30. This achieves automated cleaning of the powder, reduces the workload of operators, improves powder cleaning efficiency, and reduces labor costs. At the same time, it can prevent operators from being directly exposed to metal powder for a long time, which could cause health damage. This cleaning method can optimize the movement trajectory of the powder cleaning mechanism 22, reduce its ineffective back-and-forth movement in the already cleaned area, effectively shorten the overall powder cleaning time, improve powder cleaning efficiency, and perform longer powder cleaning operations in areas with a large accumulation of metal powder, thereby improving the powder cleaning effect.

[0029] In some embodiments, the control device 50 includes a data processing unit 51 and a path planning unit 52. The data processing unit 51 receives image information acquired by the image acquisition mechanism 41 and generates a powder distribution map to be cleaned. The path planning unit 52 is communicatively connected to the data processing unit 51 and can plan a powder cleaning path based on the powder distribution map. Optionally, the control device 50 uses an industrial-grade PLC control cabinet or an embedded industrial computer, which has a built-in data processing unit 51 and path planning unit 52, enabling precise control of the powder cleaning process.

[0030] In some embodiments, the image acquisition mechanism 41 may be an industrial camera. Industrial cameras have the advantages of fast image acquisition speed, stable imaging and good image consistency. They can output original image information without automatic beautification processing, and can truly restore the distribution position and distribution state of the powder to be cleaned on the substrate 12 and the formed parts 100, thereby facilitating the control device 50 to reasonably plan the powder cleaning path.

[0031] In some embodiments, the negative pressure adsorption pipeline 221 includes a connecting pipeline 2211 and a vacuum pump 2212 disposed on the connecting pipeline 2211. The two ends of the connecting pipeline 2211 are respectively connected to the powder suction head 222 and the inlet of the recovery device 30. The vacuum pump 2212 is used to generate negative pressure at the powder suction head 222 through the connecting pipeline 2211, thereby drawing the powder to be cleaned in the sealed space formed between the powder suction head 222 and the surface it is in contact with to the recovery device 30 through the connecting pipeline 2211.

[0032] In some embodiments, the connecting pipe 2211 is a Venturi vacuum tube. When gas enters the Venturi vacuum tube, it can utilize the Venturi effect to create a negative pressure at its throat, thereby achieving the suction of the powder to be cleaned.

[0033] like Figure 2 and combined Figure 1 As shown, the suction head 222 is shaped like a funnel. When the drive mechanism 21 drives the cleaning mechanism 22 to move to the corresponding area to be cleaned, the suction head 222 can cover the area to be cleaned, forming a sealed space between the suction head 222 and the surface it is in contact with. When the negative pressure adsorption pipeline 221 is activated, the suction head 222 can draw in the powder to be cleaned from this sealed space and collect it back into the recovery device 30 via the negative pressure adsorption pipeline 221. By setting the suction head 222 to a funnel shape, its coverage area on the area to be cleaned can be increased, thereby increasing the amount of powder cleaned by the suction head 222 in a single pass and improving cleaning efficiency.

[0034] In some embodiments, the powder suction head 222 is made of a flexible material. The flexible powder suction head 222 can adaptively adjust its shape according to the powder-to-be-cleaned area at different tilt angles, thereby improving the sealing of the enclosed space formed between the powder suction head 222 and the surface it adheres to, further improving powder cleaning efficiency and effect. Optionally, the powder suction head 222 is made of silicone material, which has a simple structure, is easy to process, and has low processing costs.

[0035] In some embodiments, the powder cleaning mechanism 22 further includes a powder cleaning brush 223 and a rotary drive 224. The rotary drive 224 is disposed on the periphery of the powder suction head 222, and the powder cleaning brush 223 is connected to the output end of the rotary drive 224. The rotary drive 224 can drive the powder cleaning brush 223 to rotate to loosen the powder to be cleaned adhering to the substrate 12 or the part 100, thereby facilitating the powder suction head 222 to suck up the powder to be cleaned.

[0036] In some embodiments, the cleaning brush 223 can be an anti-static brush. The anti-static brush can promptly dissipate the static charge generated by friction during its high-speed rotating cleaning process, eliminating electrostatic adsorption on the surface of the cleaning brush 223 and preventing the powder to be cleaned from adsorbing onto it, thus ensuring the cleaning effect of the cleaning brush 223. It also facilitates the suction head 222 to draw up the powder to be cleaned. Optionally, the cleaning brush 223 can be made of nylon or carbon fiber filaments. Of course, this embodiment does not limit the material of the cleaning brush 223; designers can also use other materials with anti-static properties to prepare the cleaning brush 223.

[0037] In some embodiments, there are at least two rotary drive members 224, each rotary drive member 224 is arranged at intervals along the circumference of the powder suction head 222, and the output end of each rotary drive member 224 is connected to a powder cleaning brush 223 to further improve the cleaning efficiency of the powder to be cleaned.

[0038] In some embodiments, the rotary drive 224 is a miniature motor, which is small in size and requires little installation space, thereby improving the structural compactness of the powder cleaning mechanism 22.

[0039] In some embodiments, the powder cleaning mechanism 22 further includes an air blowing head 225, which is disposed around the powder suction head 222 and is connected to an external air source. The air blowing head 225 can blow high-pressure airflow towards the area to be cleaned, causing the powder to be cleaned in the area to be lifted, thereby making it easier for the powder to be cleaned to be sucked up by the powder suction head 222, improving the cleaning efficiency and cleaning effect.

[0040] In some embodiments, the air blowing head 225 is also provided with a vibrator, which is used to drive the air blowing head 225 to vibrate, so as to further improve the powder cleaning efficiency and powder cleaning effect of the air blowing head 225.

[0041] In some embodiments, the outlet of the blowing head 225 is flat, thereby making the high-pressure airflow linear, increasing the impact force of the high-pressure airflow, and ensuring that the powder to be cleaned adhering to the substrate 12 and the formed part 100 is lifted, thus facilitating the suction head 222 to draw in the lifted powder. It is understood that the blowing head 225 can be primarily used to peel off the powder adhering to holes in the formed part 100 and accumulated in corners and crevices, thereby assisting the suction head 222 in drawing in powder from cleaning dead zones, further improving the powder cleaning effect. Optionally, the blowing head 225 is a pulse air knife.

[0042] In some embodiments, the number of air blowing heads 225 is at least two, and each air blowing head 225 is arranged at circumferential intervals along the powder suction head 222 to further improve the powder blowing efficiency.

[0043] In some embodiments, the cleaning device 20 further includes a pressure detection element 23, which is disposed on the powder suction head 222, with its detection end extending into the inside of the powder suction head 222 to detect the pressure value of the sealed space formed between the powder suction head 222 and the surface it contacts. The pressure detection element 23 is communicatively connected to the control device 50. When the pressure value of the sealed space formed between the powder suction head 222 and the surface it contacts is less than a preset pressure value, the control device 50 can control the vacuum pump 2212 to increase its rotation speed to increase the vacuum degree in the sealed space and improve the suction effect of the powder to be cleaned. Optionally, the pressure detection element 23 can be a pressure sensor, which has high detection accuracy, is easy to install, and has low operating costs.

[0044] It should be noted that the inner side of the suction head 222 specifically refers to the side of the suction head 222 that is in contact with the area to be cleaned.

[0045] In some embodiments, the drive mechanism 21 may be a six-axis manipulator, and the powder cleaning mechanism 22 is connected to the execution end of the six-axis manipulator. The six-axis manipulator has strong motion flexibility, can approach the area to be cleaned from multiple angles and directions, and has high positioning accuracy and strong versatility.

[0046] In other embodiments, the drive mechanism 21 may also be a three-axis motion platform, and the powder cleaning mechanism 22 is connected to the output end of the three-axis motion platform. The three-axis motion platform is a commonly used drive device in the art for outputting driving forces in the X / Y / Z directions; the specific structure of the three-axis motion platform will not be described in detail in this embodiment.

[0047] like Figure 3 and combined Figure 1 As shown, the recycling device 30 includes a filtration mechanism 31 and a recycling container 32. The filtration mechanism 31 includes a filter housing 311 and several filter screens 312. The top of the filter housing 311 is connected to the outlet end of the negative pressure adsorption pipeline 221. The filter screens 312 are arranged vertically and spaced apart within the filter housing 311, dividing the filter housing 311 into several filter chambers 3110. From top to bottom, the pore size of each filter screen 312 gradually decreases. Each filter chamber 3110 is connected to a corresponding recycling container 32. This arrangement allows for the classification and sieving of the powder to be cleaned according to different particle sizes, and its recycling by the corresponding recycling container 32. This not only prevents large particles of impurities from mixing into the qualified powder and affecting the quality of the formed parts during powder reuse, but also enables the recycling and reuse of qualified powder, thereby significantly saving raw material costs.

[0048] In this embodiment, there are three filter screens 312, which are arranged from top to bottom as a primary screen 3121, a secondary screen 3122, and a tertiary screen 3123. A primary filtration chamber 3111 is formed between the primary screen 3121 and the secondary screen 3122, a secondary filtration chamber 3112 is formed between the secondary screen 3122 and the tertiary screen 3123, and a tertiary filtration chamber 3113 is formed between the tertiary screen 3123 and the inner bottom wall of the filter housing 311. The recycling container 32 includes a primary recycling container 321, a secondary recycling container 322, and a tertiary recycling container 323. The primary recycling container 321 is connected to the primary filtration chamber 3111, the secondary recycling container 322 is connected to the secondary filtration chamber 3112, and the tertiary recycling container 323 is connected to the tertiary filtration chamber 3113. In other words, the powder to be cleaned that remains in the primary filtration chamber 3111 after being filtered by the primary screen 3121 and the secondary screen 3122 can be recovered by the primary recovery container 321; the powder to be cleaned that remains in the secondary recovery container 322 after being filtered by the secondary screen 3122 and the tertiary screen 3123 can be recovered by the secondary recovery container 322; and the powder to be cleaned that remains in the tertiary filtration chamber 3113 after being filtered by the tertiary screen 3123 can be recovered by the tertiary recovery container 323.

[0049] For example, the primary screen 3121 is a 40-mesh screen, used to filter large particulate impurities, and the primary recovery container 321 is a large particulate impurity recovery container; the secondary screen 3122 is a 100-mesh screen, and the secondary recovery container 322 is a recyclable powder recovery container; the tertiary screen 3123 is a 200-mesh screen, and the tertiary recovery container 323 is an excessively fine powder recovery container. The large particulate impurities in the primary recovery container 321 can be discarded, while the powder to be cleaned recovered in the secondary and tertiary recovery containers 322 and 323 is qualified powder and can be recycled.

[0050] It should be noted that this embodiment does not limit the specific number of filter screens 312 or the aperture of each level of filter screen 312. Designers can make adaptive adjustments according to actual recycling needs.

[0051] In some embodiments, each filter chamber 3110 corresponds to at least two recovery containers 32, and each recovery container 32 is connected to the corresponding filter chamber 3110 through an independent first distribution pipe 33. Each first distribution pipe 33 is equipped with a first switching valve, and each first switching valve is communicatively connected to the control device 50. The control device 50 can control the opening of the corresponding first switching valve according to the composition of the powder currently used in the forming cylinder 10, thereby achieving the classified recovery of the powder to be cleaned, preventing the mixing of different types of powder, and avoiding affecting the quality of the formed parts when the powder is reused. Optionally, the first switching valve can be a solenoid valve, which has high control precision and fast response.

[0052] like Figure 1 and Figure 3 As shown, the additive manufacturing powder recovery system also includes an information interaction device 60. The control device 50 is communicatively connected to the information interaction device 60, allowing the operator to transmit the composition of the powder currently used in the forming cylinder 10 to the control device 50 via the information interaction device 60. In this embodiment, the information interaction device 60 is a touch screen display. The operator sends the composition information of the powder currently used in the forming cylinder 10 to the control device 50 by clicking on the corresponding location on the touch screen display.

[0053] In some embodiments, the detection device 40 further includes a powder composition analyzer 42, which is used to obtain the composition of the powder to be cleaned in the cylinder 11. The powder composition analyzer 42 is communicatively connected to the control device 50. By setting the powder composition analyzer 42, online analysis of the composition of the powder to be cleaned in the forming cylinder 10 can be realized. The control device 50 can control the opening of the corresponding first switching valve according to the analysis results of the powder composition analyzer 42, thereby further improving the automation level of the additive manufacturing powder recovery system and reducing labor costs.

[0054] like Figure 3 As shown, the recycling device 30 also includes a first vibration mechanism 34. Each filter screen 312 is correspondingly connected to the first vibration mechanism 34. The first vibration mechanism 34 is used to generate high-frequency vibration on the corresponding filter screen 312 to prevent the filter screens 312 from becoming clogged, which helps to extend the service life of the filter screens 312. Optionally, the first vibration mechanism 34 can be an ultrasonic transducer.

[0055] In some embodiments, the recovery device 30 further includes a second vibration mechanism 35 disposed at the bottom of the filter housing 311 to generate high-frequency vibrations on the filter housing 311, thereby providing downward force for the powder to be cleaned entering the filter housing 311. Optionally, the second vibration mechanism 35 may be a vibrator.

[0056] In some embodiments, an observation window is provided on the filter housing 311 at the position corresponding to each filter chamber 3110, so that the operator can observe the sieving situation in each level of filter chamber 3110 and the sieve hole status of each level of filter screen 312 through the observation window, and replace the filter screen 312 in time when it becomes clogged.

[0057] like Figure 1 As shown, each recycling container 32 is also equipped with a weight sensor 37, which is used to detect the weight of the powder recycled in the corresponding recycling container 32.

[0058] In some embodiments, each recycling container 32 is also equipped with an electronic tag 36, which is communicatively connected to the control device 50. The control device 50 can write information such as the batch, weight, and composition of the powder recycled in each recycling container 32 into the electronic tag 36 and generate an electronic report so that the operator can understand it in a timely manner.

[0059] like Figure 1 and Figure 3 As shown, the recycling device 30 also includes a waste powder container (not shown) and a second distribution pipeline (not shown). The waste powder container is connected to the negative pressure adsorption pipeline 221 through the second distribution pipeline. A second switching valve is installed on the second distribution pipeline. The detection device 40 also includes a humidity detection element 43, which is used to obtain the humidity value of the powder to be cleaned in the cylinder 11. Both the humidity detection element 43 and the second switching valve are communicatively connected to the control device 50. When the humidity value obtained by the humidity detection element 43 is greater than the preset humidity value, the control device 50 controls the second switching valve to open. When the humidity value of the powder to be cleaned in the cylinder 11 is greater than the preset humidity value, it indicates that the powder to be cleaned is severely damp or contaminated and cannot be recycled. At this time, the control device 50 can control the second switching valve to open and simultaneously control each first switching valve to close, so that the powder to be cleaned sucked by the powder suction head 222 is collected by the waste powder container through the negative pressure adsorption pipeline 221 and the second distribution pipeline in sequence for disposal or other use, preventing severely damp or contaminated powder from being recycled and affecting the quality of the formed part 100. Optionally, the second switching valve can be a solenoid valve, which has high control accuracy and fast response.

[0060] It should be noted that this embodiment does not limit the specific value of the preset humidity value. Operators can make adaptive adjustments to the preset humidity value according to actual forming requirements and powder composition.

[0061] In some embodiments, the touch screen can also display a distribution map of the powder to be cleaned, the current cleaning progress, recycling-related data, and alarm information. Alarm information includes, but is not limited to, cleaning completion information, filter screen 312 replacement reminders, and information indicating that the powder to be cleaned needs to be manually removed. When the touch screen displays information indicating that the powder to be cleaned needs to be manually removed, the operator can manually remove the powder at the corresponding location after the cleaning device 20 has automatically completed the cleaning process.

[0062] In some embodiments, the operator can also send an immediate cleaning signal to the control device 50 by tapping a corresponding location on the touch display screen. When the control device 50 receives the immediate cleaning signal, it controls the detection device 40 and the cleaning device 20 to perform the corresponding actions.

[0063] In other embodiments, the control device 50 can also be connected to the control system of the additive manufacturing equipment. When the additive manufacturing equipment finishes printing the part 100, it sends a completion printing signal to the control device 50, and the control device 50 then controls the detection device 40 and the cleaning device 20 to perform corresponding actions.

[0064] like Figure 1 As shown, the additive manufacturing powder recovery system also includes a cleaning chamber 70, which is at least partially covered outside the cylinder 11. The cleaning device 20 and the detection device 40 are both located within the cleaning chamber 70. The recovery device 30 is located on one side of the cleaning chamber 70, and the end of the negative pressure adsorption pipe 221 away from the powder suction head 222 extends out of the cleaning chamber 70 and connects to the inlet of the recovery device 30 (filter housing 311). The control device 50 and the information interaction device 60 are both installed on the outer wall of the cleaning chamber 70. The cleaning chamber 70 provides a safe and sealed space for the powder cleaning process within the forming cylinder 10. On the one hand, it prevents external moisture from entering the forming cylinder 10 and causing the powder to be cleaned to become damp, while also reducing the chance of the powder to be cleaned coming into contact with oxygen, thereby preventing the powder to be cleaned from being oxidized. On the other hand, it prevents the powder to be cleaned from leaking out, avoiding the health risks caused by operators inhaling metal dust.

[0065] In some embodiments, after the part 100 in the forming cylinder 10 has finished printing, the forming cylinder 10 can be transferred as a whole into the cleaning chamber 70 to clean the powder to be cleaned. In other embodiments, the forming cylinder 10 can extend into the cleaning chamber 70 from the bottom opening, and a sealing structure is provided between the outer periphery of the forming cylinder 10 (specifically the cylinder body 11) and the bottom opening of the cleaning chamber 70 to ensure that the powder cleaning process is carried out in a safe and sealed space.

[0066] In some embodiments, the forming cylinder 10 further includes a lifting mechanism 13, which is disposed within the cylinder body 11 and its output end is connected to the substrate 12. The lifting mechanism 13 is communicatively connected to the control device 50. The control device 50 controls the lifting mechanism 13 to drive the substrate 12, the parts 100 on the substrate 12, and the powder to be cleaned to rise according to the powder cleaning path, so that the parts 100 are gradually pushed out of the cylinder body 11, thereby facilitating the cleaning device 20 to automatically clean the powder to be cleaned in the corresponding cleaning area.

[0067] Continue as Figure 1As shown, the detection device 40 also includes a powder concentration detector 44, which is used to detect the powder concentration in the forming cylinder 10. The powder concentration detector 44 is communicatively connected to the control device 50. After the cleaning device 20 completes the cleaning of the powder to be cleaned in the forming cylinder 10 according to the cleaning path planned by the control device 50, the powder concentration detector 44 can detect the powder concentration in the forming cylinder 10 again. When the powder concentration in the forming cylinder 10 is less than the preset powder concentration, the control device 50 outputs a cleaning end command. When the powder concentration in the forming cylinder 10 is greater than or equal to the preset powder concentration, the image acquisition mechanism 41 can re-acquire the image information of the powder to be cleaned on the substrate 12 and the part 100. The control device 50 then re-plans the cleaning path according to the current image information to perform a second cleaning of the powder to be cleaned in the forming cylinder 10, thereby ensuring the cleaning effect.

[0068] Example 2 This embodiment provides a method for recycling additive manufacturing powder, based on the additive manufacturing powder recycling system provided in Embodiment 1.

[0069] like Figure 4 As shown, the additive manufacturing powder recovery method provided in this embodiment includes the following steps: Step S1: The image acquisition mechanism 41 acquires image information of the powder to be cleaned on the substrate 12 and the part 100; Step S2: The control device 50 plans the powder cleaning path based on the image information and the features of the part 100; Step S3: The control device 50 controls the drive mechanism 21 to drive the powder cleaning mechanism 22 to move along the powder cleaning path, so that the powder suction head 222 sucks up the powder to be cleaned and the powder to be cleaned passes through the powder suction head 222 and the negative pressure adsorption pipeline 221 in sequence before entering the recovery device 30.

[0070] The additive manufacturing powder recovery method provided in this embodiment involves the image acquisition mechanism 41 acquiring image information of the powder to be cleaned on the substrate 12 and the formed part 100 after the part printing is completed. The control device 50 then plans the powder cleaning path based on the image information and controls the drive mechanism 21 to drive the powder cleaning mechanism 22 to move along the powder cleaning path. This allows the suction head 222 to draw in the powder to be cleaned and pass through the suction head 222 and the negative pressure adsorption pipe 221 before entering the recovery device 30. This achieves automated cleaning of the powder, reduces the workload of operators, improves powder cleaning efficiency, and reduces labor costs. It also prevents operators from being directly exposed to metal powder for extended periods, thus avoiding health damage. This cleaning method optimizes the movement trajectory of the powder cleaning mechanism 22, reduces its ineffective back-and-forth movement within the already cleaned area, effectively shortens the overall powder cleaning time, improves powder cleaning efficiency, and allows for longer powder cleaning operations in areas with a large accumulation of metal powder, thereby improving the powder cleaning effect.

[0071] In step S1, the image acquisition mechanism 41 uses an industrial camera. Industrial cameras have the advantages of fast image acquisition speed, stable imaging and good image consistency. They can output original image information without automatic beautification processing, and can truly restore the distribution position and distribution state of the powder to be cleaned on the substrate 12 and the formed parts 100, thereby facilitating the control device 50 to reasonably plan the powder cleaning path.

[0072] In some embodiments, step S2 specifically includes: Step S21: The data processing unit 51 receives the image information acquired by the image acquisition mechanism 41 and generates a distribution map of the powder to be cleaned; Step S22: Path planning unit 52 plans the powder cleaning path according to the powder distribution map to be cleaned.

[0073] The control device 50 adopts an industrial-grade PLC control cabinet or an embedded industrial computer, which has a built-in data processing unit 51 and a path planning unit 52, enabling precise control of the powder cleaning process.

[0074] In some embodiments, the additive manufacturing powder recovery method further includes: Step S3': Humidity detection device 43 acquires the humidity value of the powder to be cleaned inside cylinder 11; If the humidity value is greater than the preset humidity value, then proceed to step S31'; If the humidity value is less than or equal to the preset humidity value, then proceed to step S32'; S31': Control device 50 controls the connection between negative pressure adsorption pipeline 221 and waste powder container; S32': Control device 50 controls the connection between negative pressure adsorption pipeline 221 and recovery container 32.

[0075] When the humidity value of the powder to be cleaned in the cylinder 11 is greater than the preset humidity value, it indicates that the powder is severely damp or contaminated and cannot be recycled. In this case, the control device 50 connects the negative pressure adsorption pipeline 221 to the waste powder container so that the powder to be cleaned sucked by the suction head 222 is collected by the waste powder container through the negative pressure adsorption pipeline 221 for disposal or other uses, preventing severely damp or contaminated powder from being recycled and affecting the quality of the formed part 100. When the humidity value of the powder to be cleaned in the cylinder 11 is less than or equal to the preset humidity value, the control device 50 connects the negative pressure adsorption pipeline 221 to the recycling container 32 so that the powder to be cleaned sucked by the suction head 222 is collected by the recycling container 32 through the negative pressure adsorption pipeline 221 for reuse, thereby reducing raw material costs and improving the forming quality of the part 100.

[0076] It should be explained that step S3' only needs to be located before the powder to be cleaned enters the recycling device 30 in step S3, and its order with steps S1 and S2 is not limited. That is to say, step S3' can be arranged before step S1, between step S1 and step S2, between step S2 and step S3, or within step S3.

[0077] In some embodiments, the method further includes the following after step S3: Step S4: Powder concentration detector 44 obtains the powder concentration in the forming cylinder 10; If the powder concentration is less than or equal to the preset powder concentration, the control device 50 outputs a powder cleaning end command. If the powder concentration is greater than the preset powder concentration, then proceed to step S1.

[0078] It should be noted that this embodiment does not limit the preset powder concentration, and operators can make adaptive adjustments according to actual cleaning needs.

[0079] Based on the above embodiments, the following typical but non-limiting examples are provided: Example 1: 3D printing a metal workpiece with multiple spaced holes. The workpiece is a complex structure made of titanium alloy powder, with many deep cavities and dead angles inside. The additive manufacturing powder recovery system provided in Example 1 is used to perform powder cleaning operations on it.

[0080] The cleaning chamber 70 adopts a fully enclosed explosion-proof chamber.

[0081] After the part 100 in the forming cylinder 10 is printed, the forming cylinder 10 and the part 100 therein are transferred to the cleaning cavity 70; the image acquisition mechanism 41 acquires image information of the powder to be cleaned on the substrate 12 and the part 100; the control device 50 plans the powder cleaning path according to the image information and the characteristics of the part 100.

[0082] The control device 50 controls the cleaning device 20 and the lifting mechanism 13 to perform corresponding actions according to the powder cleaning path.

[0083] Specifically, the lifting mechanism 13 drives the base plate 12 and the parts 100 and the powder to be cleaned on the base plate 12 to rise, so that the parts 100 are gradually pushed out of the cylinder 11. The moving speed of the lifting mechanism 13 driving the base plate 12, the single ejection height of the parts 100, and the single ejection volume of the powder to be cleaned are all controlled and executed by the control device 50.

[0084] The control device 50 controls the powder suction head 222, the powder cleaning brush 223 and the air blowing head 225 of the cleaning device 20 to start in coordination according to the distribution map of the powder to be cleaned, so as to clean the hard-to-clean areas from different angles. During the process, the cleaning control parameters of the air blowing head 225 are automatically adjusted according to the speed of the powder blowing and the quality of powder breaking. At the same time, the negative pressure adsorption pipeline 221 is activated to realize the automatic recovery of the powder to be cleaned, thereby achieving high-speed and high-quality intelligent powder cleaning.

[0085] The rotary drive component 224 has a rotational speed of 10 rpm to 30 rpm; the blowing pressure of the blowing head 225 is 0.65 MPa and the frequency is 10 Hz to 30 Hz; the amplitude of the vibrator on the blowing head 225 is 3 mm; and the negative pressure adsorption pipeline 221 has an automatic frequency conversion.

[0086] The powder concentration detector 44 acquires the powder concentration in the forming cylinder 10 in real time; the pressure detector 23 acquires the pressure value of the sealed space formed between the powder suction head 222 and the surface it is in contact with in real time; and the humidity detector 43 acquires the humidity value of the powder to be cleaned in the cylinder 11 in real time.

[0087] Based on the above detection parameters, this example automatically cleans the powder three times without any manual intervention.

[0088] After verification by the operators, the powder cleaning results are as follows: Compared with ordinary powder cleaning methods, the additive manufacturing powder recovery system provided in Example 1 improves the powder cleaning efficiency by 70%; the powder recovery rate reaches 99.2%; there is no dust overflow; the powder cleaning qualification rate is ≥99%; the proportion of manual operation intervention is ≤5%; and there is no adverse impact on the quality of part 100.

[0089] Example 2: A 3D-printed ring-shaped metal part with multiple spaced holes. The workpiece is a complex high-temperature alloy structure with many deep cavities and few dead angles. The additive manufacturing powder recovery system provided in Example 1 is used to perform powder cleaning operations on it.

[0090] The cleaning chamber 70 adopts a fully enclosed explosion-proof chamber.

[0091] After the part 100 in the forming cylinder 10 has finished printing, the forming cylinder 10 and the part 100 therein are transferred to the cleaning chamber 70. The image acquisition mechanism 41 acquires image information of the powder to be cleaned on the substrate 12 and the part 100. The control device 50 plans the powder cleaning path based on the image information and the characteristics of the part 100. When planning the powder cleaning path, the control device 50 also incorporates the forming process parameters input from the control system of the additive manufacturing equipment and analyzes the hardness distribution of the powder layer on the porous alternating annular metal workpiece, thereby providing the optimal powder cleaning path and powder cleaning method.

[0092] Specifically, the lifting mechanism 13 drives the base plate 12 and the parts 100 and the powder to be cleaned on the base plate 12 to rise, so that the parts 100 are gradually pushed out of the cylinder 11. The moving speed of the lifting mechanism 13 driving the base plate 12, the single push height of the parts 100, and the single push amount of the powder to be cleaned are all controlled and executed by the control device 50.

[0093] The control device 50 controls the powder suction head 222, the powder cleaning brush 223 and the air blowing head 225 of the cleaning device 20 to start in coordination according to the distribution map of the powder to be cleaned, so as to clean the hard-to-clean areas from different angles. During the process, the cleaning control parameters of the air blowing head 225 are automatically adjusted according to the speed of the powder blowing and the quality of powder breaking. At the same time, the negative pressure adsorption pipeline 221 is activated to realize the automatic recovery of the powder to be cleaned, thereby achieving high-speed and high-quality intelligent powder cleaning.

[0094] The rotary drive component 224 has a rotation speed of 5 rpm to 10 rpm; the blowing pressure of the blowing head 225 is 0.7 MPa and the frequency is 5 Hz to 15 Hz; the amplitude of the vibrator on the blowing head 225 is 1 mm to 3 mm; and the negative pressure adsorption pipeline 221 has an automatic frequency conversion.

[0095] The powder concentration detector 44 acquires the powder concentration in the forming cylinder 10 in real time; the pressure detector 23 acquires the pressure value of the sealed space formed between the powder suction head 222 and the surface it is in contact with in real time; and the humidity detector 43 acquires the humidity value of the powder to be cleaned in the cylinder 11 in real time.

[0096] Based on the above detection parameters, this example automatically cleans the powder three times without any manual intervention, and the control device 50 stores and optimizes the data through self-learning.

[0097] After verification by the operators, the powder cleaning results are as follows: Compared with ordinary powder cleaning methods, the additive manufacturing powder recovery system provided in Example 1 improves the powder cleaning efficiency by 85%; the powder recovery rate reaches 99%; there is no dust overflow; the powder cleaning qualification rate is ≥99%; the proportion of manual operation intervention is <5%; and there is no adverse impact on the quality of part 100.

[0098] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An additive manufacturing powder recovery system, characterized in that, include: A forming cylinder (10) includes a cylinder body (11) and a base plate (12) disposed in the cylinder body (11), wherein a formed part (100) is carried on the base plate (12). The cleaning device (20) includes a drive mechanism (21) and a powder cleaning mechanism (22). The powder cleaning mechanism (22) includes a negative pressure adsorption pipeline (221) and a powder suction head (222) connected to the inlet end of the negative pressure adsorption pipeline (221). The powder cleaning mechanism (22) is connected to the output end of the drive mechanism (21). The drive mechanism (21) can drive the powder cleaning mechanism (22) to move linearly and / or rotate in three-dimensional space. The inlet of the recovery device (30) is connected to the outlet of the negative pressure adsorption pipeline (221); The detection device (40) includes an image acquisition mechanism (41), which is capable of acquiring image information of the powder to be cleaned on the substrate (12) and the part (100); The control device (50) is communicatively connected to both the drive mechanism (21) and the image acquisition mechanism (41). The control device (50) can plan the powder cleaning path according to the image information and the characteristics of the part (100), and control the drive mechanism (21) to drive the powder cleaning mechanism (22) to move according to the powder cleaning path, so that the powder suction head (222) sucks up the powder to be cleaned and the powder to be cleaned passes through the powder suction head (222) and the negative pressure adsorption pipeline (221) in sequence before entering the recycling device (30).

2. The additive manufacturing powder recovery system according to claim 1, characterized in that, The control device (50) includes: The data processing unit (51) is used to receive image information acquired by the image acquisition mechanism (41) and generate a distribution map of the powder to be cleaned; The path planning unit (52) is communicatively connected to the data processing unit (51), and the path planning unit (52) can plan the cleaning path according to the powder distribution map to be cleaned.

3. The additive manufacturing powder recovery system according to claim 1, characterized in that, The powder cleaning mechanism (22) further includes: The cleaning brush (223) and the rotary drive (224) are provided on the periphery of the powder suction head (222), and the output end of the rotary drive (224) is connected to the cleaning brush (223) to drive the cleaning brush (223) to rotate, thereby blowing away the powder to be cleaned in the cleaning area; And / or, an air blowing head (225) is disposed on the periphery of the powder suction head (222), the air blowing head (225) being connected to an external air source to blow high-pressure airflow to the area to be cleaned.

4. The additive manufacturing powder recovery system according to claim 1, characterized in that, The cleaning device (20) further includes: A pressure detection element (23) is disposed on the powder suction head (222), and the detection end of the pressure detection element (23) extends into the inside of the powder suction head (222) to detect the pressure value of the sealed space formed between the powder suction head (222) and the surface that it is in contact with. The pressure detection element (23) is communicatively connected to the control device (50).

5. The additive manufacturing powder recovery system according to claim 1, characterized in that, The recycling device (30) includes: The filtration mechanism (31) includes a filter housing (311) and a plurality of filter screens (312). The top of the filter housing (311) is connected to the outlet end of the negative pressure adsorption pipeline (221). Each of the filter screens (312) is arranged in the filter housing (311) at intervals along the vertical direction, and the filter housing (311) is divided into a plurality of filter chambers (3110). From top to bottom, the pore size of each filter screen (312) gradually decreases. The recycling container (32) is connected to each of the filter chambers (3110).

6. The additive manufacturing powder recovery system according to claim 5, characterized in that, Each of the filter chambers (3110) corresponds to at least two of the recycling containers (32), and each of the recycling containers (32) is connected to the corresponding filter chamber (3110) through an independent first distribution pipe (33), and each of the first distribution pipes (33) is provided with a first switching valve, which is communicatively connected to the control device (50).

7. The additive manufacturing powder recovery system according to claim 6, characterized in that, The detection device (40) further includes: A powder composition analyzer (42) is used to obtain the composition of the powder to be cleaned in the cylinder (11). The powder composition analyzer (42) is communicatively connected to the control device (50).

8. The additive manufacturing powder recovery system according to claim 5, characterized in that, The recycling device (30) also includes a waste powder container and a second distribution pipeline. The waste powder container is connected to the negative pressure adsorption pipeline (221) through the second distribution pipeline. A second switching valve is provided on the second distribution pipeline. The detection device (40) further includes a humidity detection element (43), which is used to obtain the humidity value of the powder to be cleaned in the cylinder (11). The humidity detection element (43) and the second switch valve are both connected to the control device (50). When the humidity value obtained by the humidity detection element (43) is greater than the preset humidity value, the control device (50) controls the second switch valve to open.

9. A method for recovering additive manufacturing powder, based on the additive manufacturing powder recovery system as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step S1: The image acquisition mechanism (41) acquires image information of the powder to be cleaned on the substrate (12) and the part (100); Step S2: The control device (50) plans the powder cleaning path based on the image information and the features of the part (100); Step S3: The control device (50) controls the drive mechanism (21) to drive the cleaning mechanism (22) to move according to the cleaning path, so that the suction head (222) sucks up the powder to be cleaned and the powder to be cleaned passes through the suction head (222) and the negative pressure adsorption pipeline (221) in sequence and enters the recycling device (30).

10. The additive manufacturing powder recovery method according to claim 9, characterized in that, The recycling device (30) includes a recycling container (32) and a waste powder container; The detection device (40) further includes a humidity detection element (43), which is used to obtain the humidity value of the powder to be cleaned in the cylinder (11); The additive manufacturing powder recovery method further includes: Step S3': The humidity detection device (43) obtains the humidity value of the powder to be cleaned in the cylinder (11); if the humidity value is greater than the preset humidity value, then step S31' is executed; if the humidity value is less than or equal to the preset humidity value, then step S32' is executed. S31': The control device (50) controls the negative pressure adsorption pipeline (221) to be connected to the waste powder container; S32': The control device (50) controls the negative pressure adsorption pipeline (221) to be connected to the recovery container (32).

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