Blowing control method, blowing control system, and laser printing device

Abstract

The application discloses a blowing control method, a blowing control system and a laser printing device. The blowing control method comprises the following steps: analyzing printing data of the laser printing device to form a wind path control strategy; adjusting blowing angles of a plurality of blowing channels and adjusting suction angles of a plurality of suction channels based on the wind path control strategy to form a plurality of wind path channels; monitoring laser paths and position information in the laser printing device in real time by using a detection camera to obtain detection information; updating the wind path control strategy according to the detection information; and the wind path control strategy is used to make a plurality of laser beams on each printing layer be in separate wind path channels. According to the blowing control method, the plurality of laser beams are in separate wind path channels, the smoke generated by sintering of each laser beam is discharged along the wind path channel, the laser beams in other wind path channels are not shielded, the smoke generated by sintering of the laser beams at the upwind opening does not shield the laser beams at the downwind opening, and the printing quality is improved.

Description

Technical Field

[0001] This application relates to the field of metal 3D printing technology, specifically to a blower control method, a blower control system, and a laser printing device. Background Technology

[0002] Selective Laser Melting (SLM) is a method of metal additive manufacturing. In SLM metal 3D printing, a laser sintersects the metal layers in the printing chamber point by point, surface by surface, according to the shape of the part's cross-section, and then stacks them layer by layer to form a complete part. During the laser sintering process, fumes are generated. These fumes interfere with the laser beam, weakening its intensity and affecting the part's microstructure and properties. Therefore, it is necessary to remove the fumes promptly during laser printing. Currently, ventilation is used to remove the fumes from the printing chamber. However, in current ventilation systems, fumes generated by laser sintering at the upwind position can block the laser beam at the downwind position, resulting in weakened laser intensity at the downwind position and affecting the printing quality of the part. Summary of the Invention

[0003] In view of the above, it is necessary to propose a blowing control method, a blowing control system, and a laser printing equipment to prevent the smoke and dust generated by the laser sintering at the upwind end from obscuring the laser at the downwind end, thereby improving printing quality.

[0004] This application provides a blowing control method applied to a laser printing device. The laser printing device includes a blowing module, a suction module, a processing module, and a detection camera. The blowing module includes multiple angle-adjustable blowing channels, and the suction module includes multiple angle-adjustable suction channels. The processing module is used to analyze data and control the blowing and suction angles of the blowing and suction modules. The blowing control method includes: analyzing the printing data of the laser printing device to form a wind path control strategy, the printing data including the trajectory and position information of multiple laser beams in each printing layer; adjusting the blowing angle of multiple blowing channels and the suction angle of multiple suction channels based on the wind path control strategy to form multiple wind path channels; using the detection camera to monitor the laser path and position information in the laser printing device in real time to obtain detection information; and updating the wind path control strategy according to the detection information. The wind path control strategy is used to ensure that the multiple laser beams on each printing layer are respectively located in separate wind path channels.

[0005] In some embodiments, analyzing the printing data of the laser printing device to form an airflow control strategy includes: acquiring the trajectory and position information of multiple laser beams running in each printing layer in the printing data; analyzing the trajectory and position information of multiple laser beams running in each printing layer, calculating the most suitable blowing and suction angle for each airflow channel so that each laser beam is in a separate airflow channel; and forming the airflow control strategy based on the most suitable blowing and suction angle for each airflow channel.

[0006] In some embodiments, the plurality of air-blowing channels are divided into a first air-blowing section and a second air-blowing section by a bisector. Both the first and second air-blowing sections include three air-blowing channels. The airflow control strategy includes ensuring that the air-blowing angles of the air-blowing channels in the first and second air-blowing sections satisfy the following conditions: if θ1 < 90°, ψ1 = (180 - θ1) / 2, ψ2 = ψ1 + (90 - ψ1) / 3, ψ3 = ψ1 + 2(90 - ψ1) / 3; if θ1 > 90°, ψ3 = (180 - θ1) / 2 + 90°, ψ2 = ψ3 + (90 - ψ3) / 3, ψ1 = ψ3 + 2(90 - ψ3) / 3; if θ2 < 90°, ψ4 = (180 - θ2) / 2, ψ5 = ψ4 + (90 - ψ1) / 2, ψ2 = ψ3 + (90 - ψ1) / 3, ψ3 = ψ1 + 2(90 - ψ1) / 3; if θ2 < 90°, ψ4 = (180 - θ2) / 2, ψ5 = ψ4 + (90 - ψ1) / 2, ψ3 = ψ1 + 2(90 - ψ1) / 3, ψ4 = ψ5 + 2(90 - ψ1) / 3, ψ5 = ψ1 + 2(90 - ψ1) / 3, ψ2 ... ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3; if θ2>90°, ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3; where θ1 is the angle between the line connecting the laser located on the left side of the upwind outlet and the laser located on the left side of the downwind outlet and a center line, the center line being perpendicular to the bisector; ψ1, ψ2, and ψ3 are the blowing angles of the three blowing channels in the first blowing section that gradually approach the bisector; θ2 is the angle between the line connecting the laser located on the right side of the upwind outlet and the laser located on the right side of the downwind outlet and the center line; ψ6, ψ5, and ψ4 are the blowing angles of the three blowing channels in the second blowing section that gradually approach the bisector.

[0007] In some embodiments, the plurality of suction channels are divided into a first suction section and a second suction section by the bisector. Both the first and second suction sections include three suction channels. The airflow control strategy further includes ensuring that the suction angles of the suction channels in the first and second suction sections satisfy the following conditions: ψ7=ψ6, ψ8=ψ5, ψ9=ψ4, ψ 10 =ψ3,ψ 11 =ψ2,ψ 12 =ψ1; where ψ7, ψ8, and ψ9 are the suction angles of the three suction channels in the first suction section that gradually approach the bisector; ψ 12 ψ 11ψ 10 The suction angle is the suction angle of the three suction channels in the second suction section that gradually approach the bisector.

[0008] In some embodiments, updating the airflow control strategy based on the detection information includes: determining whether the blowing and suction effect of the airflow channel meets the requirements based on the detection information; if the requirements are not met, adjusting the blowing and suction angle of the airflow channel includes: when the blowing angle of the blowing channel is less than 90°, reducing the blowing angle of the blowing channel by a preset range, and adjusting the suction angle of the corresponding suction channel accordingly based on the adjusted blowing angle of the blowing channel; when the blowing angle of the blowing channel is greater than 90°, increasing the blowing angle of the blowing channel by a preset range, and adjusting the suction angle of the corresponding suction channel accordingly based on the adjusted blowing angle of the blowing channel.

[0009] This application also provides a blowing control system applied to a laser printing device. The laser printing device includes a printing chamber and multiple lasers. The printing chamber is used to lay metal powder to form a printing layer. The multiple lasers are used to emit multiple laser beams towards the printing layer to scan and sinter the printing layer. The blowing control system includes: a processing module coupled to the laser printing device, used to receive and analyze the printing data of the laser printing device to form an airflow control strategy. The printing data includes the trajectory and position information of the multiple laser beams running in each printing layer; and a blowing module coupled to the processing module and located at the upper air outlet of the printing chamber. The blowing module includes multiple angle-adjustable blowing vents. The system includes a blowing module for adjusting the blowing angle of multiple blowing channels based on the airflow control strategy; a suction module, coupled to the processing module and located at the downwind vent of the printing chamber, comprising multiple angle-adjustable suction channels, for adjusting the suction angle of the multiple suction channels based on the airflow control strategy; and a detection camera, coupled to the processing module and located at the top of the printing chamber, for real-time monitoring of the laser path and position information within the printing chamber to obtain detection information and sending the detection information to the processing module; the processing module is further configured to update the airflow control strategy based on the received detection information.

[0010] In some embodiments, the number of the plurality of blowing channels corresponds to the number of the plurality of suction channels, and each blowing channel corresponds to a corresponding suction channel, thereby forming a plurality of air path channels so that multiple laser beams can be in separate air path channels.

[0011] In some embodiments, the plurality of blowing channels are divided into a first blowing section and a second blowing section by a bisector, and the plurality of suction channels are divided into a first suction section and a second suction section by the bisector. Both the first and second blowing sections include three blowing channels. The airflow control strategy includes ensuring that the blowing angles of the blowing channels in the first and second blowing sections satisfy the following conditions: if θ1 < 90°, ψ1 = (180 - θ1) / 2, ψ2 = ψ1 + (90 - ψ1) / 3, ψ3 = ψ1 + 2(90 - ψ1) / 3; if θ1 > 90°, ψ3 = (180 - θ1) / 2 + 90°, ψ2 = ψ3 + (90 - ψ3) / 3, ψ1 = ψ3 + 2(90 - ψ3) / 3; if θ2 < 90°, ψ4 ... 90 - ψ3) / 3, ψ4 = (180 - θ1) / 2 + 90°, ψ2 = ψ3 + 90 - ψ3) / 3, ψ3 = ψ4 + 90 - θ1 / 2 + 90°, ψ3 = ψ4 + 90 - θ1 / 2 + 90°, ψ3 = 2) / 2, ψ5=ψ4+(90-ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3; If θ2>90°, ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3; Wherein, θ1 is the angle between the line connecting the laser located on the left side of the upwind outlet and the laser located on the left side of the downwind outlet and a center line, the center line being perpendicular to the bisector; ψ1, ψ2, and ψ3 are the blowing angles of the three blowing channels in the first blowing section that gradually approach the bisector; θ2 is the angle between the line connecting the laser located on the right side of the upwind outlet and the laser located on the right side of the downwind outlet and the center line; ψ6, ψ5, and ψ4 are the blowing angles of the three blowing channels in the second blowing section that gradually approach the bisector.

[0012] In some embodiments, both the first suction section and the second suction section include three suction channels, and the airflow control strategy further includes ensuring that the suction angles of the suction channels of the first suction section and the second suction section satisfy the following condition: ψ7=ψ6, ψ8=ψ5, ψ9=ψ4, ψ 10 =ψ3,ψ 11 =ψ2,ψ 12 =ψ1; where ψ7, ψ8, and ψ9 are the suction angles of the three suction channels in the first suction section that gradually approach the bisector; ψ 12 ψ 11 ψ 10 The suction angle is the suction angle of the three suction channels in the second suction section that gradually approach the bisector.

[0013] In some embodiments, the suction module is used to adjust the suction angle of the plurality of suction channels based on the airflow control strategy, which includes: after receiving the airflow control strategy, the suction module delays for a preset time and then adjusts the suction angle of the plurality of suction channels.

[0014] In some embodiments, the blowing module includes a blowing cavity and a plurality of blowing components. The blowing cavity has an air inlet and an air outlet with a diameter larger than that of the air inlet. The plurality of blowing components are disposed in the blowing cavity and located at the air outlet of the blowing cavity. Each blowing component includes two synchronously rotating blowing plates, and the blowing channel is formed between the two blowing plates of each blowing component.

[0015] In some embodiments, the suction module includes a suction cavity and a plurality of suction components. The suction cavity has a suction port and an exhaust port with a diameter smaller than that of the suction port. The plurality of suction components are disposed in the suction cavity and located at the suction port of the suction cavity. Each suction component includes two synchronously rotating suction plates, and the suction channel is formed between the two suction plates of each suction component.

[0016] This application also provides a laser printing device, including the blowing control system described above.

[0017] The blowing control method, blowing control system, and laser printing equipment provided in this application form an airflow control strategy by analyzing the printing data of the laser printing equipment. Specifically, the strategy analyzes the trajectory and position information of multiple laser beams in each printing layer. The blowing angle of multiple blowing channels and the suction angle of multiple suction channels are adjusted to form multiple airflow channels. The airflow control strategy ensures that the multiple laser beams on each printing layer are in separate airflow channels, so that only one laser beam is in each separate airflow channel. The smoke generated by the sintering of this single laser beam is discharged along the airflow channel in which it is located, preventing the smoke from obscuring the lasers in other airflow channels. This effectively avoids the smoke generated by the sintering of the laser at the upper airflow point from obscuring the laser at the lower airflow point, which is beneficial to improving printing quality. Furthermore, by updating the airflow control strategy based on the detection information obtained from the detection camera, it is possible to adjust the blowing angle of multiple airflow channels and the suction angle of multiple airflow channels in real time based on the detection of the situation where the laser located at the downwind end is blocked by the smoke and dust generated by the laser located at the upwind end. This ensures that each laser beam is in a separate airflow channel in real time, thereby ensuring that the smoke and dust generated by the laser sintering at the upwind end will not block the laser at the downwind end, eliminating the smoke and dust obstruction situation, optimizing the airflow control strategy, and ensuring printing quality. Attached Figure Description

[0018] Figure 1 This is a schematic flowchart of the blowing control method provided in the embodiments of this application.

[0019] Figure 2 This is a schematic diagram of the structure of the laser printing equipment provided in the embodiments of this application.

[0020] Figure 3This is a planar schematic diagram of multiple air blowing channels, multiple air suction channels, printing layers, and multiple laser beams provided in the embodiments of this application.

[0021] Figure 4 This is a planar schematic diagram of the printing layer, laser path, and airflow channel applicable to embodiments of this application.

[0022] Figure 5 This is a plan view of another printing layer, another laser path, and another airflow channel applicable to embodiments of this application.

[0023] Figure 6 This is a three-dimensional schematic diagram of the detection camera detecting the laser path and position information according to an embodiment of this application.

[0024] Figure 7 This is a side view schematic diagram of the detection camera detecting the laser path and position information according to an embodiment of this application.

[0025] Figure 8 This is a top view schematic diagram of the detection camera detecting the laser path and position information in an embodiment of this application.

[0026] Figure 9 This is a functional block diagram of the blower control system provided in the embodiments of this application.

[0027] Figure 10 yes Figure 2 A perspective view of the blowing and suction modules of a laser printing equipment.

[0028] Explanation of main component symbols

[0029] Laser printing equipment 1

[0030] Blower control system 100

[0031] Blower Module 10

[0032] Air blowing channel 11

[0033] First blowing section 12

[0034] Second blowing section 13

[0035] Blower cavity 14

[0036] Air inlet 141

[0037] Air outlet 142

[0038] Hair dryer assembly 15

[0039] Blower plate 151

[0040] Blower drive unit 152

[0041] Hair dryer belt 153

[0042] Blower spinner 154

[0043] Hair dryer swivel 155

[0044] 20 air intake modules

[0045] Air intake channel 21

[0046] First suction section 22

[0047] Second suction section 23

[0048] Suction chamber 24

[0049] Air intake 241

[0050] Exhaust vent 242

[0051] Suction component 25

[0052] Suction plate 251

[0053] Suction drive component 252

[0054] Suction belt 253

[0055] Suction Rotary Wheel 254

[0056] Suction shaft 255

[0057] Processing module 30

[0058] Detection camera 40

[0059] Wind tunnel 50

[0060] Printing room 200

[0061] Laser 300

[0062] Laser 301

[0063] Light band 302

[0064] Print layer 400

[0065] Bisector 500

[0066] 600 Middle Line Detailed Implementation

[0067] The embodiments of this application 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 elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0068] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0071] Please see Figure 1 This application provides a blowing control method, which is applied to a laser printing device 1 (see [link to application]). Figure 2 The laser printing equipment 1 uses a blowing control method to remove the smoke and dust generated by laser sintering in the laser printing equipment 1, and can effectively prevent the smoke and dust generated by laser sintering at the upper air outlet from blocking the laser at the lower air outlet, thereby improving the printing quality of the laser printing equipment 1.

[0072] Please refer to the above. Figure 2 and Figure 3In this embodiment, the laser printing device 1 includes a blowing module 10, a suction module 20, a processing module 30, a detection camera 40, a printing chamber 200, and lasers 300. The printing chamber 200 is used to lay metal powder to form a powder bed printing layer 400. The printing chamber 200 is light-transmitting. There can be multiple lasers 300. Multiple lasers 300 are used to emit multiple laser beams 301 into the printing layer 400 in the printing chamber 200 to scan and sinter the printing layer 400. The blowing module 10 includes multiple angle-adjustable blowing channels 11. The blowing module 10 is located at the upper air outlet of the printing chamber 200 and is used to blow air into the printing chamber. The smoke and dust generated by the laser sintering 301 inside the printing chamber 200 are removed by the suction module 20, which includes multiple adjustable suction channels 21. The suction module 20 is located at the downwind end of the printing chamber 200. The suction module 20 is used to remove and discharge the smoke and dust generated by the laser sintering 301 inside the printing chamber 200. The processing module 30 is used to analyze data and control the blowing and suction angles of the blowing module 10 and the suction module 20. The blowing and suction angles can be understood as the blowing angle of the blowing channel 11 and the suction angle of the suction channel 21. The detection camera 40 is located at the top of the printing chamber 200. The detection camera 40 is used to monitor the laser path and position information inside the printing chamber 200 in real time.

[0073] Please see Figure 1 The blowing control method provided in this application includes the following steps S10 to S40.

[0074] Step S10: Analyze the printing data of the laser printing equipment 1 to form an airflow control strategy. The printing data includes the trajectory and position information of the multiple laser beams 301 running in each printing layer 400.

[0075] Step S20: Based on the airflow control strategy, adjust the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 to form multiple airflow channels 50 (see [link to relevant documentation]). Figure 4 ).

[0076] Step S30: Use the detection camera 40 to monitor the laser path and position information in the laser printing equipment 1 in real time to obtain detection information.

[0077] Step S40: Update the airflow control strategy based on the detection information. The airflow control strategy is used to ensure that the multiple laser beams on each printing layer are in independent airflow channels to avoid the smoke and dust generated by the laser at the upper airflow point blocking the laser at the lower airflow point.

[0078] Specifically, in step S10, the processing module 30 receives and analyzes the printing data of the laser printing device 1 to form an airflow control strategy. That is, the processing module 30 receives and analyzes the trajectory and position information of the multiple laser beams 301 running in each printing layer 400 to form an airflow control strategy. It can be understood that since the required scanning and sintering shape of each printing layer 400 is different in metal 3D printing, the processing module 30 needs to analyze the trajectory and position information of the multiple laser beams 301 running in each printing layer 400. In other words, the airflow control strategy formed for each printing layer 400 is different. The trajectory of the laser 301 can be roughly understood as the required scanning and sintering shape of the printing layer 400.

[0079] In step S20, please refer to Figure 4 The processing module 30 controls the blowing module 10 and the suction module 20 to adjust the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 based on the air path control strategy. By adjusting the blowing angle of the blowing channel 11 and the suction angle of the suction channel 21, multiple air path channels 50 are formed between the multiple blowing channels 11 and the multiple suction channels 21. Each air path channel 50 is an independent air path channel, and the multiple air path channels 50 do not interfere with each other. It can also be understood that the smoke and dust will flow along the individual air path channel 50 and will not flow into other air path channels 50. Correspondingly, the airflow control strategy ensures that the multiple laser beams 301 on each printing layer 400 are located in separate airflow channels 50. Based on this, each laser beam 301 can be located in a separate airflow channel 50. The smoke generated by the sintering of one laser beam 301 will flow along its own airflow channel 50 and will not flow into other airflow channels 50. Since there is only one laser beam 301 in each airflow channel 50, this laser beam 301 is not relative to the laser beam 301 at the upper airflow position or the laser beam 301 at the lower airflow position. The smoke generated by the sintering of this laser beam 301 will not affect or block other laser beams 301. This effectively solves the problem that the smoke generated by the laser beam 301 at the upper airflow position blocks the laser beam 301 at the lower airflow position. Since each laser beam 301 is not blocked by smoke and dust, the intensity of the laser beam 301 is not weakened. Eliminating the smoke and dust blocking situation is beneficial to improving the printing quality of the laser beam 301.

[0080] In step S30, after adjusting the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 through the air path control strategy, since the laser path and position information of the laser 301 on each printing layer 400 are changed in real time, the laser path can be understood as the path between the current position of the laser 301 on the printing layer 400 and the position it is about to move to. In actual execution, the scanning speed of the laser 301 is very fast, for example, it can reach 1000mm / s-2000mm / s. Therefore, it is necessary to use the detection camera 40 to monitor the laser path and position information in the printing chamber 200 of the laser printing equipment 1 in real time to obtain detection information. This detection information indicates that the laser 301 located at the downwind end is blocked by the smoke and dust generated by the laser 301 located at the upwind end. This facilitates the real-time adjustment of the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 according to the blocking situation of the laser 301 located at the upwind end on the laser 301 located at the downwind end, so as to eliminate the blocking situation of smoke and dust. The detection time interval of the detection camera 40 can be set to 2 seconds. Understandably, the detection time interval of the detection camera 40 can also be set according to actual production needs.

[0081] In step S40, the processing module 30 updates and optimizes the airflow control strategy in real time based on the detection information obtained by the detection camera 40. When the detection camera 40 detects that the laser 301 located downwind is blocked by the smoke generated by the laser 301 located upwind, the blowing module 10 and the suction module 20 adjust the blowing and suction angles based on the updated and optimized airflow control strategy to eliminate the smoke blockage. This also ensures that each laser beam 301 is in a separate airflow channel 50, thereby improving the response efficiency of the laser printing equipment 1.

[0082] Thus, the above-mentioned airflow control method, by executing steps S10 to S40, analyzes the printing data of the laser printing device 1 to form an airflow control strategy. The airflow control strategy adjusts the blowing angle of multiple airflow channels 11 and the suction angle of multiple airflow channels 21 to form multiple airflow channels 50. The airflow control strategy ensures that the multiple laser beams 301 on each printing layer 400 are in separate airflow channels 50, so that there is only one laser beam 301 in a separate airflow channel 50. The smoke generated by the sintering of this single laser beam 301 is discharged along the airflow channel 50 in which it is located, and the smoke will not block the laser beams 301 in other airflow channels 50. This effectively avoids the smoke generated by the sintering of the laser beam 301 at the upper airflow position from blocking the laser beam 301 at the lower airflow position, which is beneficial to improving printing quality. Furthermore, by updating the airflow control strategy based on the detection information obtained by the detection camera 40, it is possible to adjust the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 in real time based on the detection that the laser 301 located at the downwind end is blocked by the smoke and dust generated by the laser 301 located at the upwind end. This ensures that each laser 301 is in a separate airflow channel 50 in real time, thereby ensuring that the smoke and dust generated by the sintering of the laser 301 located at the upwind end will not block the laser 301 located at the downwind end, eliminating the smoke and dust blockage, optimizing the airflow control strategy, and ensuring printing quality.

[0083] In this embodiment of the application, step S10 specifically includes steps S12 to S16.

[0084] Step S12: Obtain the trajectory and position information of the multiple laser beams 301 running in each printing layer 400 of the printing data.

[0085] Step S14: Analyze the trajectory and position information of multiple laser beams 301 in each printing layer 400, and calculate the most suitable blowing and suction angle for each air path channel 50 so that each laser beam 301 is in a separate air path channel 50.

[0086] Step S16: Form an airflow control strategy based on the most suitable blowing and suction angle for each airflow channel 50.

[0087] Specifically, in step S12, the processing module 30, coupled to the laser printing device 1, receives printing data from the laser printing device 1 and obtains the trajectory and position information of the multiple laser beams 301 in each printing layer 400 through the received printing data. In step S14, the processing module 30 analyzes the trajectory and position information of the multiple laser beams 301 in each printing layer 400 to ensure that each laser beam 301 is in a separate airflow channel 50. Based on the fact that each laser beam 301 is in a separate airflow channel 50, the most suitable blowing and suction angles for each airflow channel 50 are obtained. It can be understood that in actual execution, the multiple laser beams 301 can be divided into regions according to the number of laser beams 301, so that each laser beam 301 is in a separate region. By selecting the corresponding blowing channel 11 and suction channel 21 through the divided regions, when the airflow channel 50 formed by the blowing channel 11 and suction channel 21 roughly matches the corresponding region, the most suitable blowing and suction angles for the airflow channel 50 at that time can be determined. In step S16, a wind path control strategy is formed based on the most suitable blowing and suction angle of the determined wind path channel 50 at that time.

[0088] Please see Figure 4 In one specific embodiment, the number of lasers 301 is defined as four, and the four lasers 301 are respectively located on the left side of the upwind vent, the right side of the upwind vent, the left side of the downwind vent, and the right side of the downwind vent. The processing module 30 is coupled to the laser printing device 1 to receive the printing data of the laser printing device 1 for the current printing layer 400. The processing module 30 analyzes the running trajectory and position information of each laser beam 301 on the current printing layer 400 according to the printing data. Based on the current printing layer 400 and the current position information of each laser beam 301, the processing module 30 divides the current printing layer 400 into multiple independent regions, and determines whether all four lasers 301 are located in a single region. If there are two lasers 301 in a region, the division of the current printing layer 400 into regions is adjusted until the four lasers 301 are divided into four independent regions. The most suitable blowing and suction angle of the air outlet channel 50 is determined according to the division of the current printing layer 400 into regions. Based on determining the most suitable blowing and suction angles for each airflow channel 50, a corresponding blowing channel 11 and suction channel 21 are selected. The blowing and suction angles of the selected blowing and suction channels 11 and 12 are then determined according to these optimal angles, thus forming an airflow control strategy. The blowing and suction angles of the blowing and suction channels 11 and 21 are adjusted based on this strategy, ensuring that the four lasers 301 are positioned within their respective independent regions.

[0089] Please see Figure 5After printing the previous printing layer 400, powder is spread in the printing chamber 200 to form another printing layer 400. The shape of the other printing layer 400 is different from that of the previous printing layer 400, that is, the running trajectory and position information of the laser 301 corresponding to the other printing layer 400 are different. The processing module 30 receives the printing data of the laser printing device 1 for the other printing layer 400 again. The processing module 30 analyzes the running trajectory and position information of each laser beam 301 in the other printing layer 400 according to the printing data. Based on the current position information of the other printing layer 400 and each laser beam 301, the processing module 30 re-divides the other printing layer 400 into multiple independent regions, and determines whether the four lasers 301 are all located in a separate region, until the four lasers 301 are divided into four independent regions respectively. The processing module 30 then determines the most suitable blowing and suction angle of the air outlet channel 50 according to the regions divided by the other printing layer 400. Based on determining the most suitable blowing and suction angles for each airflow channel 50, a corresponding blowing channel 11 and suction channel 21 are selected. The blowing and suction angles of the selected blowing and suction channels 11 and 12 are then determined according to these optimal angles, thus forming a new airflow control strategy. The blowing and suction angles of the blowing and suction channels 11 and 21 are adjusted based on this new strategy, ensuring that the four lasers 301 are positioned within independent regions when printing the new printing layer 400.

[0090] Thus, by executing steps S12 to S16, the air blowing control method enables the processing module 30 to form an airflow control strategy based on the printing data. The air blowing channel 11 and the air suction channel 12 adjust the blowing and suction angles according to the formed airflow control strategy, ensuring that each laser beam 301 is in a separate airflow channel 50. This prevents the smoke and dust generated by the upper airflow laser 301 from obscuring the lower airflow laser 301. The air blowing control method can quickly form an airflow control strategy based on the current trajectory and position information of the laser 301. The fast response speed of the air blowing control method allows each airflow channel 50 to be adjusted to the most suitable blowing and suction angle in a timely manner, eliminating the obscuring effect of smoke and dust and improving printing quality.

[0091] Please see Figure 3In this embodiment, the number of multiple blowing channels 11 corresponds to the number of multiple suction channels 21. The multiple blowing channels 11 are divided into a first blowing section 12 and a second blowing section 13 by a bisecting line 500. Both the first blowing section 12 and the second blowing section 13 include three blowing channels 11. The multiple suction channels 21 are divided into a first suction section 22 and a second suction section 23 by the bisecting line 500. Both the first suction section 22 and the second suction section 23 include three suction channels 21. The blowing channel 11 of the first blowing section 12 corresponds to the suction channel 21 of the first suction section 22, thereby forming multiple air passages 50, so that the laser 301 located on the left side of the upper air outlet and the left side of the lower air outlet is in a separate air passage 50; the blowing channel 11 of the second blowing section 13 corresponds to the suction channel 21 of the second suction section 23, thereby forming multiple air passages 50, so that the laser 301 located on the right side of the upper air outlet and the right side of the lower air outlet is in a separate air passage 50.

[0092] In this embodiment, a centerline 600 perpendicular to the bisector 500 is defined. Four lasers 301 are positioned on the left, right, left, and right sides of the upwind and downwind openings, respectively. The left and right sides of the bisector 500 are defined, and the upwind and downwind openings are defined by the vertical alignment of the centerline 600. The angle between the line connecting the laser 301 on the left side of the upwind and the laser 301 on the left side of the downwind and the centerline 600 is θ1. The angle between the line connecting the laser 301 on the right side of the upwind and the laser 301 on the right side of the downwind and the centerline 600 is θ2. The blowing angles of the six blowing channels 11 from left to right are defined as ψ1, ψ2, ψ3, ψ4, ψ5, and ψ6, respectively. The suction angles of the six suction channels 21 from left to right are defined as ψ7, ψ8, ψ9, and ψ6, respectively. 10 ψ 11 ψ 12 The blowing angle and suction angle can be understood as the angles between the blowing channel 11 and the suction channel 11 and the centerline 60°. It can be understood that ψ1, ψ2, and ψ3 gradually approach the bisector 50°; ψ6, ψ5, and ψ4 gradually approach the bisector 50°; ψ7, ψ8, and ψ9 gradually approach the bisector 50°. 12 ψ 11 ψ 10 To gradually approach the bisecting line 500. Understandably, in other embodiments, the number of lasers 301 can be more or less, and the number of air blowing channels 11 and air suction channels 21 can also be more or less, which can be set according to the actual situation.

[0093] In this embodiment of the application, when θ1 < 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the first blowing section 12 satisfy the following condition:

[0094] ψ1=(180-θ1) / 2, ψ2=ψ1+(90-ψ1) / 3, ψ3=ψ1+2(90-ψ1) / 3.

[0095] When θ2 < 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the second blowing section 13 satisfy the following condition:

[0096] ψ4=(180-θ2) / 2, ψ5=ψ4+(90-ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3.

[0097] When θ1 > 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the first blowing section 12 satisfy the following condition:

[0098] ψ3=(180-θ1) / 2+90°, ψ2=ψ3+(90-ψ3) / 3, ψ1=ψ3+2(90-ψ3) / 3.

[0099] When θ2 > 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the second blowing section 13 satisfy the following condition:

[0100] ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3.

[0101] In order to form an airflow channel 50 with the blowing channel 11 and the corresponding suction channel 21, the angles of the blowing channel 11 and the suction channel 21 are centrally symmetrical. The airflow control strategy also includes ensuring that the suction angles of the three suction channels 21 of the first suction section 22 and the three suction channels 21 of the second suction section 23 satisfy the following condition:

[0102] ψ7=ψ6, ψ8=ψ5, ψ9=ψ4, ψ 10 =ψ3,ψ 11 =ψ2,ψ 12 =ψ1.

[0103] Thus, by satisfying the above conditions, the blowing and suction angles of each blowing channel 11 and each suction channel 21 can be calculated, thereby forming an airflow control strategy.

[0104] In this embodiment of the application, step S40 specifically includes steps S42 to S46.

[0105] Step S42: Determine whether the blowing and suction effect of the air passage 50 meets the requirements based on the detection information.

[0106] If light bands appear in the detection information, it indicates that the laser 301 located downwind is being obscured by the smoke and dust generated by the laser 301 located upwind, indicating that the blowing and suction effect of the air passage 50 is not meeting the requirements. If the requirements are not met, steps S44-S46 are executed to adjust the blowing angle of the air passage.

[0107] Step S44: When the blowing angle of the blowing channel 11 is less than 90°, the blowing angle of the blowing channel 11 is reduced by a preset range, and the suction angle of the corresponding suction channel 21 is adjusted accordingly based on the adjusted blowing angle of the blowing channel 11.

[0108] Step S46: When the blowing angle of the blowing channel 11 is greater than 90°, the blowing angle of the blowing channel 11 is increased by a preset range, and the suction angle of the corresponding suction channel 21 is adjusted accordingly based on the adjusted blowing angle of the blowing channel 11.

[0109] Specifically, in step S42, please refer to [reference needed]. Figure 6 , Figure 7 and Figure 8 ,in Figure 7 and Figure 8The middle arrow indicates the direction of the wind. From the perspective of the detection camera 40, when the laser 301 sweeps across the smoke and dust at the upwind vent, it leaves a light band 302. The detection camera 40 can detect and monitor the laser path and position information within the laser printing equipment 1 in real time. When the smoke and dust generated by the laser at the upwind vent obstructs the laser 301 at the downwind vent, a light band 302 will be generated. This is because there is a certain angle between the angle of the detection camera 40 and the angle of the laser 301. The processing module 30 uses the detection camera 40 to monitor the laser path and position information within the laser printing equipment 1 in real time to obtain the light band information and uses the light band information as detection information. The processing module 30 determines, based on the obtained light band information, that the smoke and dust generated by the laser at the upwind vent obstructs the laser 301 at the downwind vent. In this embodiment, when the laser 301 located at the downwind end sweeps across the smoke and dust generated by the sintering of the laser 301 at the upwind end, it leaves a light band 302. If the blowing and suction angles of the blowing channel 11 and the suction channel 21 are appropriate, it can be ensured that each laser beam 301 is in a separate airflow channel 50. Therefore, the smoke and dust generated by the sintering of the laser 301 at the upwind end in one airflow channel 50 will not block the laser 301 located at the downwind end in another airflow channel 50, thus preventing the generation of the light band 302. The blowing and suction effect can be understood as whether the light band 302 exists from the perspective of the detection camera 40. If the light band 302 does not exist, the blowing and suction effect of the airflow channel 50 meets the requirements. If the light band 302 exists, the blowing and suction effect of the airflow channel 50 does not meet the requirements. If the requirements are not met, the blowing angle of the blowing channel 11 and the suction angle of the suction channel 21 need to be adjusted to ensure that each laser beam 301 is in a separate airflow channel 50.

[0110] Specifically, in step S30, after the processing module 30 initially forms the air path control strategy based on the printing data and adjusts the blowing and suction angles of the blowing channel 11 and the suction channel 21 based on the air path control strategy, the laser 301 is in different air path channels 50, and the detection camera 40 will not detect the light band 302. The presence of a light band 302 within the printing chamber 200 is monitored in real time using a detection camera 40. This monitoring determines whether the current airflow path 50's blowing and suction effect meets requirements. If the detection camera 40 does not detect the light band 302, the current airflow path 50's blowing and suction effect meets requirements. If the detection camera 40 detects the light band 302, it indicates that two lasers 301 exist in one of the airflow paths 50, causing smoke and dust at the upwind end to obscure the laser 301 at the downwind end, resulting in the light band 302. This causes the airflow path 50's blowing and suction effect to fail to meet requirements. In this case, step S40 is executed. The processing module 30 updates the airflow control strategy based on the light band information detected by the detection camera 40 until the detection camera 40 no longer detects the light band 302. This indicates that the updated airflow control strategy ensures that each laser 301 is in a separate airflow path 50, eliminating the smoke and dust obscuring the light band.

[0111] In step S44, when the blowing and suction effect of the air passage 50 does not meet the requirements, if the blowing angle of the current blowing passage 11 is less than 90°, i.e. ψ1, ψ2, ψ3, ψ4, ψ5, and ψ6 are less than 90°, the blowing angle of the blowing passage 11 is reduced by a preset range, such as by 1 / 4, 1 / 5, or 1 / 6. The suction angle of the corresponding suction passage 21 is adjusted accordingly based on the adjusted blowing angle of the blowing passage 11 until the blowing and suction effect of the air passage 50 meets the requirements.

[0112] In step S46, when the blowing and suction effect of the air passage 50 does not meet the requirements, if the blowing angle of the current blowing passage 11 is greater than 90°, that is, ψ1, ψ2, ψ3, ψ4, ψ5, and ψ6 are greater than 90°, the blowing angle of the blowing passage 11 is increased by a preset range, such as by 1 / 4, 1 / 5, or 1 / 6, and the suction angle of the corresponding suction passage 21 is adjusted accordingly based on the adjusted blowing angle of the blowing passage 11 until the blowing and suction effect of the air passage 50 meets the requirements.

[0113] Thus, the blowing control method, by executing steps S42 to S46, updates the airflow control strategy based on the detection information. This allows for real-time adjustment of the blowing and suction angles of the airflow channel 50 based on whether the smoke generated by the laser 301 at the upper airflow outlet obstructs the laser 301 at the lower airflow outlet, resulting in a light band 302. The blowing and suction angles are increased or decreased within a preset range, enabling gradual adjustment of the blowing and suction angles. This reduces the computational load of the processing module 30 and prevents the smoke and dust in the printing chamber 200 from scattering disorderly due to large-scale adjustments in the blowing and suction channels 11 and 21, which could obstruct the laser 301 at the lower airflow outlet and reduce its energy, thus ensuring print quality.

[0114] Please see Figure 9 This application embodiment also provides a blower control system 100, which is applied to a laser printing device 1. The laser printing device 1 uses the blower control system 100 to discharge the smoke and dust generated by the laser 301 sintering in the laser printing device 1, and can effectively prevent the smoke and dust generated by the laser 301 sintering at the upper air outlet from obscuring the laser 301 at the lower air outlet, thereby improving the printing quality of the laser printing device 1.

[0115] Please refer to the above. Figure 2 The laser printing equipment 1 includes a printing chamber 200 and multiple lasers 300. The printing chamber 200 is used to lay metal powder to form a powder bed printing layer 400. The printing chamber 200 is light-transmitting. The multiple lasers 300 are used to emit multiple laser beams 301 onto the printing layer 400 to scan and sinter the printing layer 400. The air blowing control system 100 includes a processing module 30, an air blowing module 10, an air suction module 20, and a detection camera 40.

[0116] The processing module 30 is coupled to the laser printing device 1. The processing module 30 is used to receive and analyze the printing data of the laser printing device 1 to form an airflow control strategy. The printing data includes the trajectory and position information of the multiple laser beams 301 running in each printing layer 400.

[0117] The air blowing module 10 is coupled to the processing module 30 and is located at the upper air outlet of the printing chamber 200. The air blowing module 10 includes multiple angle-adjustable air blowing channels 11. The air blowing module 10 is used to adjust the air blowing angle of the multiple air blowing channels 11 based on the air path control strategy.

[0118] The suction module 20 is coupled to the processing module 30 and is located at the downwind vent of the printing chamber 200. The suction module 20 includes multiple angle-adjustable suction channels 21. The suction module 20 is used to adjust the suction angle of the multiple suction channels 21 based on the airflow control strategy.

[0119] The detection camera 40 is coupled to the processing module 30 and is located on the top of the printing chamber 200. The detection camera 40 is used to monitor the laser path and position information in the printing chamber 200 in real time to obtain detection information and send the detection information to the processing module 30.

[0120] The processing module 30 is further configured to update the airflow control strategy based on the received detection information. The airflow control strategy is configured to place the multiple laser beams on each of the printed layers in independent airflow channels to avoid the smoke and dust generated by the laser at the upper airflow point blocking the laser at the lower airflow point.

[0121] Please refer to the above. Figure 3 In this embodiment, the number of multiple blowing channels 11 corresponds to the number of multiple suction channels 21. The multiple blowing channels 11 are divided into a first blowing section 12 and a second blowing section 13 by a bisecting line 500. The multiple suction channels 21 are divided into a first suction section 22 and a second suction section 23 by the bisecting line 500. The blowing channels 11 of the first blowing section 12 correspond to the suction channels 21 of the first suction section 22, thereby forming multiple airflow channels 50 so that the lasers 301 located on the left side of the upper airflow and the left side of the lower airflow are in separate airflow channels 50. Similarly, the blowing channels 11 of the second blowing section 13 correspond to the suction channels 21 of the second suction section 23, thereby forming multiple airflow channels 50 so that the lasers 301 located on the right side of the upper airflow and the right side of the lower airflow are in separate airflow channels 50. Accordingly, the airflow control strategy is used to ensure that the multiple lasers 301 on each printing layer 400 in the printing chamber 200 are respectively in separate airflow channels 50.

[0122] In this embodiment, a centerline 600 perpendicular to the bisector 500 is defined. There are four lasers 301, located on the left, right, left, and right sides of the upwind and downwind respectively. The left and right sides of the bisector 500 are defined as "left" and "right", and the upwind and downwind are defined as "upwind" and "downwind". The angle between the line connecting the laser 301 on the left side of the upwind and the laser 301 on the left side of the downwind and the centerline 600 is θ1. The angle between the line connecting the laser 301 on the right side of the upwind and the laser 301 on the right side of the downwind and the centerline 600 is θ2.

[0123] The first blowing section 12 and the second blowing section 13 each include three blowing channels 11. The blowing angles of the six blowing channels 11 are defined from left to right as ψ1, ψ2, ψ3, ψ4, ψ5, and ψ6. The first suction section 22 and the second suction section 23 each include three suction channels 21. The suction angles of the six suction channels 21 are defined from left to right as ψ7, ψ8, ψ9, and ψ6. 10 ψ 11 ψ12 Understandably, ψ1, ψ2, and ψ3 gradually approach the bisector of 50°; ψ6, ψ5, and ψ4 gradually approach the bisector of 50°; ψ7, ψ8, and ψ9 gradually approach the bisector of 50°. 12 ψ 11 ψ 10 To gradually approach the bisecting line 500. Understandably, in other embodiments, the number of lasers 301 can be more or less, and the number of air blowing channels 11 and air suction channels 21 can also be more or less, which can be set according to the actual situation.

[0124] In this embodiment of the application, when θ1 < 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the first blowing section 12 satisfy the following condition:

[0125] ψ1=(180-θ1) / 2, ψ2=ψ1+(90-ψ1) / 3, ψ3=ψ1+2(90-ψ1) / 3.

[0126] When θ2 < 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the second blowing section 13 satisfy the following condition:

[0127] ψ4=(180-θ2) / 2, ψ5=ψ4+(90-ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3.

[0128] When θ1 > 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the first blowing section 12 satisfy the following condition:

[0129] ψ3=(180-θ1) / 2+90°, ψ2=ψ3+(90-ψ3) / 3, ψ1=ψ3+2(90-ψ3) / 3.

[0130] When θ2 > 90°, the airflow control strategy includes ensuring that the blowing angles of the three blowing channels 11 of the second blowing section 13 satisfy the following condition:

[0131] ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3.

[0132] In order to form an airflow channel 50 by the blowing channel 11 and the suction channel 21, the angles of the blowing channel 11 and the suction channel 21 are centrally symmetrical. The airflow control strategy also includes ensuring that the suction angles of the three suction channels 21 of the first suction section 22 and the three suction channels 21 of the second suction section 23 satisfy the following condition:

[0133] ψ7=ψ6, ψ8=ψ5, ψ9=ψ4, ψ10 =ψ3,ψ 11 =ψ2,ψ 12 =ψ1.

[0134] Thus, by satisfying the above conditions, the blowing and suction angles of each blowing channel 11 and each suction channel 21 can be calculated, thereby forming an airflow control strategy.

[0135] In this embodiment, the suction module 20 is used to adjust the suction angle of multiple suction channels 21 based on the airflow control strategy. Specifically, after receiving the airflow control strategy, the suction module 20 delays for a preset time before adjusting the suction angle of the multiple suction channels 21. Specifically, the suction channels 21 of the suction module 20 serve as the outlet for smoke and dust. After receiving the airflow control strategy, the suction module 20 can delay for a preset time, such as 0.5s, 1s, or 1.5s, before adjusting the angle of the multiple suction channels 21, thereby ensuring smooth smoke and dust discharge.

[0136] Please see Figure 10 In this embodiment of the application, the blower module 10 includes a blower cavity 14 and a plurality of blower components 15. The blower cavity 14 has an air inlet 141 and an air outlet 142 with a diameter larger than that of the air inlet 141. One end of the blower cavity 14 with the air outlet 142 extends into the printing chamber 200 and the air outlet 142 is connected to the printing chamber 200. The plurality of blower components 15 are disposed in the blower cavity 14 and located at the air outlet 142 of the blower cavity 14. Each blower component 15 includes two synchronously rotating blower plates 151. A blower channel 11 is formed between the two blower plates 151 of each blower component 15. The angle of the blower channel 11 can be understood as the angle between the two blower plates 151 and the center line 600. The two blower plates 151 rotate simultaneously. Thus, by setting the specific structure of the blowing module 10, the air inlet 141 of the blowing cavity 14 is used to introduce airflow. After passing through the blowing channels 11 of multiple blowing components 15, the airflow is divided into multiple paths and blown out through the air outlet 142, thereby forming multiple air paths. In this embodiment, the number of blowing components 15 can be six. It is understood that the number of blowing components 15 can also be more or less, and can be set according to the actual situation. The air inlet 141 of the blowing cavity 14 can introduce positive pressure airflow so that the air outlet 142 of the blowing cavity 14 can blow air.

[0137] In this embodiment, each blower assembly 15 further includes a blower drive 152, a blower belt 153, a blower rotating wheel 154, and a blower rotating shaft 155. There are two blower rotating wheels 154 and two blower rotating shafts 155, each corresponding to one of the two blower plates 151. Each blower rotating shaft 155 is connected to the middle of the blower plate 151. The lower end of each blower rotating shaft 155 is rotatably connected to the lower side of the blower cavity 14, and the upper end of each blower rotating shaft 155 is rotatably connected to the upper side of the blower cavity 14, passes through the upper side of the blower cavity 14, and is connected to the corresponding blower rotating wheel 154. The blower rotating wheel 154 can be a gear, and the blower belt 153... A blower drive 152 is connected to one of the blower wheels 154 and sleeved onto two blower rotating wheels 154. The blower drive 152, blower belt 153, and blower rotating wheels 154 are all located on the upper side of the blower cavity 14 and on the outer side of the printing chamber 200. The blower drive 152 drives the blower rotating wheel 154 connected to it to rotate. The blower rotating wheel 154 drives the blower plate 151 to rotate via the blower shaft 155 and drives the other blower rotating wheel 154, the other blower shaft 155, and the other blower plate 151 to rotate via the blower belt 153, thereby causing the two blower plates 151 to rotate synchronously to adjust the blowing angle of the blower channel 11. In this way, by setting the specific structure of the blower assembly 15, the effect of adjusting the blowing angle of the blower channel 11 is achieved. The blower drive 152 can be a servo motor and is coupled to the processing module 30 to receive the air path control strategy formed by the processing module 30.

[0138] In this embodiment, the suction module 20 includes a suction cavity 24 and multiple suction components 25. The suction cavity 24 has a suction port 241 and an exhaust port 242 with a diameter smaller than that of the suction port 241. One end of the suction cavity 24 with the suction port 241 extends into the printing chamber 200 and the suction port 241 is connected to the printing chamber 200. Multiple suction components 25 are disposed in the suction cavity 24 and located at the suction port 241 of the suction cavity 24. Each suction component 25 includes two synchronously rotating suction plates 251. A suction channel 21 is formed between the two suction plates 251 of each suction component 25. The angle of the suction channel 21 can be understood as the angle between the two suction plates 251 and the center line 600. The two suction plates 251 rotate simultaneously. Thus, by setting the specific structure of the suction module 20, the suction port 241 of the suction chamber 24 is divided into multiple paths through the suction channels 21 of multiple suction components 25 to draw in smoke and dust, which are then collected and discharged through the exhaust port 242. In this embodiment, the number of suction components 25 can be six. Understandably, the number of suction components 25 can also be more or less, depending on the actual situation. The exhaust port 242 of the suction chamber 24 can introduce negative pressure airflow so that the suction port 241 of the suction chamber 24 can draw in air.

[0139] In this embodiment, each suction assembly 25 further includes a suction drive 252, a suction belt 253, a suction wheel 254, and a suction shaft 255. There are two suction wheels 254 and two suction shafts 255, each corresponding to one of the two suction plates 251. Each suction shaft 255 is connected to the middle of the suction plate 251. The lower end of each suction shaft 255 is rotatably connected to the lower side of the suction cavity 24, and the upper end of each suction shaft 255 is rotatably connected to the upper side of the suction cavity 24, passes through the upper side of the suction cavity 24, and is connected to the corresponding suction wheel 254. The suction wheel 254 can be a gear, and the suction belt 253... The suction drive component 252 is connected to one of the suction wheels 254 and is sleeved onto two suction rotating wheels 254. The suction drive component 252, the suction belt 253, and the suction rotating wheel 254 are all located on the upper side of the suction cavity 24 and on the outer side of the printing chamber 200. The suction drive component 252 drives the suction rotating wheel 254 connected to it to rotate. The suction rotating wheel 254 drives the suction plate 251 to rotate via the suction shaft 255 and drives the other suction rotating wheel 254, the other suction shaft 255, and the other suction plate 251 to rotate via the suction belt 253, thereby making the two suction plates 251 rotate synchronously to adjust the suction angle of the suction channel 21. In this way, by setting the specific structure of the suction assembly 25, the effect of adjusting the suction angle of the suction channel 21 is achieved. The suction drive component 252 can be a servo motor, and the suction drive component 252 is coupled to the processing module 30 to receive the air path control strategy formed by the processing module 30.

[0140] Thus, the aforementioned blowing control system 100 receives and analyzes the printing data of the laser printing device 1 through the processing module 30 to form an airflow control strategy. The airflow control strategy adjusts the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21. The airflow control strategy ensures that the multiple lasers 301 on each printing layer 400 are in separate airflow channels 50, so that there is only one laser 301 in a separate airflow channel 50. The smoke generated by the sintering of this single laser 301 is discharged along the airflow channel 50 in which it is located, and the smoke will not block the lasers 301 in other airflow channels 50. This effectively avoids the smoke generated by the sintering of the laser 301 at the upper airflow point from blocking the laser 301 at the lower airflow point, which is beneficial to improving printing quality. Furthermore, by updating the airflow control strategy based on the detection information obtained by the detection camera 40, it is possible to adjust the blowing angle of multiple blowing channels 11 and the suction angle of multiple suction channels 21 in real time based on the detection that the laser 301 located at the downwind end is blocked by the smoke and dust generated by the laser 301 located at the upwind end. This ensures that each laser 301 is in a separate airflow channel 50 in real time, thereby ensuring that the smoke and dust generated by the sintering of the laser 301 located at the upwind end will not block the laser 301 located at the downwind end, eliminating the smoke and dust blockage, optimizing the airflow control strategy, and ensuring printing quality.

[0141] Please see Figure 2 This application embodiment also provides a laser printing device 1 for metal 3D printing. The laser printing device 1 includes the blowing control system 100 as described above, and the laser printing device 1 can also execute the blowing control method as described above.

[0142] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A blowing control method applied to a laser printing device, the laser printing device comprising a blowing module, a suction module, a processing module, and a detection camera, wherein the blowing module includes multiple angle-adjustable blowing channels, the suction module includes multiple angle-adjustable suction channels, and the processing module is used to analyze data and control the blowing and suction angles of the blowing module and the suction module; characterized in that, The blowing control method includes: The printing data of the laser printing equipment is analyzed to form an airflow control strategy. The printing data includes the trajectory and position information of multiple laser beams running in each printing layer. Based on the airflow control strategy, the blowing angle of multiple blowing channels and the suction angle of multiple suction channels are adjusted to form multiple airflow channels. The detection camera is used to monitor the laser path and position information within the laser printing equipment in real time in order to obtain detection information. The airflow control strategy is updated based on the detection information; The airflow control strategy is used to ensure that the multiple laser beams on each printed layer are in separate airflow channels, so that there is only one laser beam in each separate airflow channel.

2. The blowing control method as described in claim 1, characterized in that, The analysis of the printing data from the laser printing equipment to formulate an airflow control strategy includes: Obtain the trajectory and position information of multiple laser beams running in each printing layer of the printing data; Analyze the trajectory and position information of multiple laser beams in each printing layer, and calculate the most suitable blowing and suction angle for each airflow channel so that each laser beam is in a separate airflow channel; The airflow control strategy is formed based on the most suitable blowing and suction angle for each of the airflow channels.

3. The blowing control method as described in claim 1, characterized in that, The plurality of air-blowing channels are divided into a first air-blowing section and a second air-blowing section by a bisecting line. Both the first air-blowing section and the second air-blowing section include three air-blowing channels. The airflow control strategy includes ensuring that the air-blowing angles of the air-blowing channels in the first air-blowing section and the second air-blowing section satisfy the following condition: If θ1<90°, ψ1=(180-θ1) / 2, ψ2=ψ1+(90-ψ1) / 3, ψ3=ψ1+2(90-ψ1) / 3; If θ1>90°, ψ3=(180-θ1) / 2+90°, ψ2=ψ3+(90-ψ3) / 3, ψ1=ψ3+2(90-ψ3) / 3; If θ2<90°, ψ4=(180-θ2) / 2, ψ5=ψ4+(90-ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3; If θ2>90°, ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3; Wherein, θ1 is the angle between the line connecting the laser located on the left side of the upwind vent and the laser located on the left side of the downwind vent and a centerline, the centerline being perpendicular to the bisector; ψ1, ψ2, and ψ3 are the blowing angles of the three blowing channels in the first blowing section that gradually approach the bisector; θ2 is the angle between the line connecting the laser located on the right side of the upwind vent and the laser located on the right side of the downwind vent and the centerline; ψ6, ψ5, and ψ4 are the blowing angles of the three blowing channels in the second blowing section that gradually approach the bisector.

4. The blowing control method as described in claim 3, characterized in that, The plurality of suction channels are divided into a first suction section and a second suction section by the bisecting line. Both the first suction section and the second suction section include three suction channels. The airflow control strategy further includes ensuring that the suction angle of the suction channels in the first suction section and the second suction section satisfies the following condition: ψ7=ψ 6 ,ψ8=ψ 5 ,ψ 9 =ψ 4 ,ψ 10 =ψ 3 ,ψ 11 =ψ 2 ,ψ 12 =ψ 1 ; Wherein, ψ7, ψ8, and ψ9 are the suction angles of the three suction channels in the first suction section that gradually approach the bisector; ψ 12 ψ 11 ψ 10 The suction angle is the suction angle of the three suction channels in the second suction section that gradually approach the bisector.

5. The blowing control method as described in claim 3, characterized in that, The step of updating the wind path control strategy based on the detection information includes: Based on the detection information, determine whether the blowing and suction effect of the air passage meets the requirements; If the requirements are not met, adjust the blowing and suction angles of the airflow path, including: When the blowing angle of the blowing channel is less than 90°, the blowing angle of the blowing channel is reduced by a preset range, and the suction angle of the corresponding suction channel is adjusted accordingly based on the adjusted blowing angle of the blowing channel. When the blowing angle of the blowing channel is greater than 90°, the blowing angle of the blowing channel is increased by a preset range, and the suction angle of the corresponding suction channel is adjusted accordingly based on the adjusted blowing angle of the blowing channel.

6. A blowing control system applied to a laser printing device, the laser printing device comprising a printing chamber and a plurality of lasers, the printing chamber being used to lay metal powder to form a printing layer, the plurality of lasers being used to emit multiple laser beams toward the printing layer to scan and sinter the printing layer, characterized in that, The blowing control system includes: A processing module, coupled to the laser printing device, is used to receive and analyze the printing data of the laser printing device to form an airflow control strategy. The printing data includes the trajectory and position information of the multiple laser beams running in each printing layer. A blower module, coupled to the processing module and located at the upper air vent of the printing chamber, includes multiple angle-adjustable blower channels. The blower module is used to adjust the blowing angle of the multiple blower channels based on the airflow control strategy. A suction module, coupled to the processing module and located at the downwind vent of the printing chamber, includes multiple angle-adjustable suction channels. The suction module is used to adjust the suction angle of the multiple suction channels based on the airflow control strategy. A detection camera, coupled to the processing module and located on the top of the printing chamber, is used to monitor the laser path and position information inside the printing chamber in real time to obtain detection information and send the detection information to the processing module. The processing module is further configured to update the airflow control strategy based on the received detection information; The number of the multiple blowing channels corresponds to the number of the multiple suction channels, and each blowing channel corresponds to the corresponding suction channel, thereby forming multiple air path channels so that multiple laser beams can be in separate air path channels, and so that there is only one laser beam in a separate air path channel.

7. The blower control system as described in claim 6, characterized in that, The plurality of air-blowing channels are divided into a first air-blowing section and a second air-blowing section by a bisecting line, and the plurality of air-suction channels are divided into a first air-suction section and a second air-suction section by the same bisecting line. Both the first air-blowing section and the second air-blowing section include three air-blowing channels. The airflow control strategy includes ensuring that the air-blowing angles of the air-blowing channels in the first air-blowing section and the second air-blowing section satisfy the following condition: If θ1<90°, ψ1=(180-θ1) / 2, ψ2=ψ1+(90-ψ1) / 3, ψ3=ψ1+2(90-ψ1) / 3; If θ1>90°, ψ3=(180-θ1) / 2+90°, ψ2=ψ3+(90-ψ3) / 3, ψ1=ψ3+2(90-ψ3) / 3; If θ2<90°, ψ4=(180-θ2) / 2, ψ5=ψ4+(90-ψ4) / 3, ψ6=ψ4+2(90-ψ4) / 3; If θ2>90°, ψ6=(180-θ2) / 2+90°, ψ5=ψ6+(90-ψ6) / 3, ψ4=ψ6+2(90-ψ6) / 3; Wherein, θ1 is the angle between the line connecting the laser located on the left side of the upwind vent and the laser located on the left side of the downwind vent and a centerline, the centerline being perpendicular to the bisector; ψ1, ψ2, and ψ3 are the blowing angles of the three blowing channels in the first blowing section that gradually approach the bisector; θ2 is the angle between the line connecting the laser located on the right side of the upwind vent and the laser located on the right side of the downwind vent and the centerline; ψ6, ψ5, and ψ4 are the blowing angles of the three blowing channels in the second blowing section that gradually approach the bisector.

8. The blower control system as described in claim 7, characterized in that, Both the first suction section and the second suction section include three suction channels. The airflow control strategy further includes ensuring that the suction angles of the suction channels in the first suction section and the second suction section satisfy the following condition: ψ7=ψ 6 ,ψ8=ψ 5 ,ψ 9 =ψ 4 ,ψ 10 =ψ 3 ,ψ 11 =ψ 2 ,ψ 12 =ψ 1 ; Wherein, ψ7, ψ8, and ψ9 are the suction angles of the three suction channels in the first suction section that gradually approach the bisector; ψ 12 ψ 11 ψ 10 The suction angle is the suction angle of the three suction channels in the second suction section that gradually approach the bisector.

9. The blower control system as described in claim 6, characterized in that, The suction module is used to adjust the suction angle of the multiple suction channels based on the airflow control strategy, including: After receiving the airflow control strategy, the air intake module adjusts the air intake angle of multiple air intake channels after a preset delay.

10. The blower control system as described in claim 6, characterized in that, The blowing module includes a blowing cavity and multiple blowing components. The blowing cavity has an air inlet and an air outlet with a diameter larger than that of the air inlet. The multiple blowing components are disposed in the blowing cavity and located at the air outlet of the blowing cavity. Each blowing component includes two synchronously rotating blowing plates, and the blowing channel is formed between the two blowing plates of each blowing component.

11. The blower control system as described in claim 6, characterized in that, The suction module includes a suction cavity and multiple suction components. The suction cavity has a suction port and an exhaust port with a diameter smaller than the suction port. The multiple suction components are disposed in the suction cavity and located at the suction port of the suction cavity. Each suction component includes two synchronously rotating suction plates, and the suction channel is formed between the two suction plates of each suction component.

12. A laser printing device, characterized in that, Includes the blower control system as described in any one of claims 6 to 11.

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