A powder cleaning box based on 3D printing equipment

Abstract

The present invention discloses a powder cleaning box based on 3D printing equipment, including a powder cleaning box body located just above the forming cylinder inside the printer, the bottom of the powder cleaning box body is open, and the interior is divided into an adjustment chamber located at the upper end and a powder suction chamber located at the lower end by a horizontal partition, and an annular guide rail and a pulse generator extending into the powder suction chamber are arranged in the adjustment chamber, and a guide rail slider installed on the annular guide rail is arranged at the top of the powder suction chamber, and an inflatable sealing ring for sealing the powder cleaning box body and the printing equipment table is arranged at the bottom of the powder suction chamber, and a mechanical arm is installed on the bottom surface of the guide rail slider. The present invention realizes automatic powder cleaning, and there is no need to open the printing equipment multiple times to cause the problem of multiple gas washing, which saves inert gas consumption, reduces production costs, saves gas washing time, and improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a powder cleaning box based on 3D printing equipment. Background Art

[0002] Metal powder 3D printers use lasers or other energy sources to sinter or melt metal powder layer by layer to eventually form three-dimensional metal parts. During the printing process, a layer of metal powder needs to be evenly spread on the printer's forming cylinder base plate, and after sintering a layer of shape, the powder is re-laid to continue printing until the printing is completed. Therefore, after printing, layers of powder are laid on the base plate of the forming cylinder, and these powders need to be cleaned up after the printing is completed before continuing the subsequent work.

[0003] When the existing powder cleaning equipment is working, it is necessary to manually load the substrate and then perform the gas washing operation in the sealed cabin. Inert gas is injected into the sealed cabin. After the content reaches the standard, the powder can be cleaned. After the powder is cleaned, the substrate needs to be replaced. At this time, the cabin is no longer sealed, the inert gas atmosphere in the cabin will leak, and the oxygen content will rise. If the powder is cleaned again, it is necessary to repeatedly inject inert gas into the sealed cabin, and the powder can only be cleaned after the oxygen content drops below the specification again. This powder cleaning method requires repeated manual installation of the substrate and gas washing before each powder cleaning. The gas washing takes a long time and the powder cleaning cycle is long, resulting in low production efficiency and repeated gas washing consumes more gas, which increases production costs. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the gas washing takes a long time and the powder cleaning cycle is long, resulting in low production efficiency and repeated gas washing consumes more gas, which increases production costs, and a powder cleaning box based on 3D printing equipment is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A powder cleaning box based on 3D printing equipment, comprising a powder cleaning box body located just above a forming cylinder inside the printer, the bottom of the powder cleaning box body is open, and the interior is divided into an adjusting chamber located at the upper end and a powder suction chamber located at the lower end by a horizontal partition, an annular guide rail and a pulse generator extending into the powder suction chamber are arranged in the adjusting chamber, a guide rail slider installed on the annular guide rail is arranged at the top of the powder suction chamber, an inflatable sealing ring for sealing the powder cleaning box body and a printing equipment table is arranged at the bottom of the powder suction chamber, and a A mechanical arm is provided, and a telescopic powder scraping assembly is provided on one side of the guide rail slider close to the inner wall of the powder cleaning box, which follows the annular guide rail to move and clean the inner wall of the powder cleaning box. A horizontal slide rail is installed at the bottom of the mechanical arm, and a multi-directional powder suction assembly is connected to the horizontal slide rail. A rotating connecting pipeline is provided in the middle of the adjustment cavity, and a powder suction telescopic tube is connected between the multi-directional powder suction assembly and the rotating connecting pipeline. A powder outlet connected to the powder suction chamber is installed at the center of the top surface of the powder cleaning box, and an air inlet pipe for discharging inert gas to the powder suction chamber is provided at the outer bottom of the powder cleaning box.

[0007] The multi-directional powder suction assembly includes a slide rail seat installed on a horizontal slide rail, a mounting sleeve connected to the side of the slide rail seat and a Y-shaped powder suction piece inserted in the mounting sleeve, the Y-shaped powder suction piece includes a Y-shaped tube, a telescopic powder suction tube and a plurality of powder blowing tubes, a ventilation connector connected to the telescopic powder suction tube is installed on the top of the Y-shaped tube, a vertical drive motor is connected between the slide rail seat and the mounting sleeve, a horizontal drive motor that drives the Y-shaped tube to rotate is installed at the bottom of the mounting sleeve, the bottom pipe openings of the Y-shaped tube are respectively connected to the telescopic powder suction tube and the plurality of powder blowing tubes, and solenoid valves are installed at the pipe openings, the Y-shaped tube follows the horizontal drive motor, the vertical drive motor and the mechanical arm to work, and rotates horizontally or vertically in the powder cleaning box to adjust the powder blowing tube toward the surface of the parts and the substrate, or to adjust the powder blowing tube to be inserted into the holes on the surface of the product, the long gap formed between the product and the substrate, the gap between the substrate and the forming cylinder, and the groove of the substrate itself.

[0008] Preferably, a pulse generator extending into the powder suction chamber is further provided in the regulating chamber, and the transmitting end of the pulse generator faces the parts on the substrate.

[0009] Preferably, a frame-shaped inner groove is provided at the bottom of the powder suction chamber, and an inflatable sealing ring for sealing the powder cleaning box and the printing equipment table is provided in the frame-shaped inner groove.

[0010] Preferably, the bottoms of both sides of the powder cleaning box are provided with a plurality of air inlet holes, and a plurality of branch pipes of the air inlet pipe are respectively fitted in the air inlet holes, and the ends of the air inlet pipe are connected to the inert gas storage tank.

[0011] Preferably, the top of the rotating connecting pipeline passes through the powder cleaning box and is provided with a connecting hole. The rotating connecting pipeline is annular in the adjusting chamber. The bottom of the rotating connecting pipeline is rotatably provided with an annular bottom plate, and a through hole for connecting the powder suction telescopic tube is opened on the annular bottom plate. The connecting hole at the top of the rotating connecting pipeline and the powder outlet are both connected to the exhaust fan.

[0012] Preferably, the upper end of the Y-shaped tube is rotatably connected in the mounting sleeve, and a driven gear is fixedly sleeved on the upper end portion of the Y-shaped tube below the mounting sleeve, and the output shaft of the horizontal drive motor is fixedly mounted with a driving gear meshing with the driven gear.

[0013] Preferably, the ventilation connector includes a ventilation sleeve located at the lower end, a spherical tube rotatably installed in the ventilation sleeve, an upper connecting tube connected to the top of the spherical tube, and a lower connecting tube connected to the bottom end of the ventilation sleeve, the top of the upper connecting tube is connected to the bottom of the powder suction telescopic tube, and the bottom end of the lower connecting tube is connected to the top of the Y-shaped tube.

[0014] Preferably, the upper end of the ventilation sleeve is hollow hemispherical, the middle part is hollow cylindrical, and the bottom is hollow frustum; an outlet is provided at the bottom of the spherical tube, the outer side of the spherical tube is fitted with the hemispherical inner wall of the ventilation sleeve, and the hemispherical surface of the ventilation sleeve is provided with an arc groove for the upper tube to pass through.

[0015] Preferably, two induction control blocks are provided on the top wall of the powder suction chamber on one side of each corner of the annular guide rail, and a controller connecting the induction control blocks and the horizontal slide rail is installed in the powder cleaning box.

[0016] Preferably, the telescopic powder suction tube comprises a hose connected to the bottom end of the Y-shaped tube, gaskets arranged at both ends of the hose, and an electric push rod connected between the two gaskets.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention provides a powder cleaning box in a 3D printing device, and installs a mechanical arm, a horizontal slide rail, an annular guide rail, a guide rail slider, a multi-directional powder suction component and a powder suction telescopic tube in the powder cleaning box. When cleaning powder, the forming cylinder is covered and the mechanical arm, the horizontal slide rail, the annular guide rail and the multi-directional powder suction component can be controlled by a program to work, thereby realizing automatic powder cleaning, and there is no need to open the printing device multiple times to cause multiple gas washing, thereby saving inert gas consumption, reducing production costs, saving gas washing time, and improving work efficiency.

[0019] In addition, the multi-directional powder suction component includes a slide rail seat, a mounting sleeve, a Y-shaped powder suction piece, a horizontal drive motor, a vertical drive motor and a ventilation connector. During the powder suction process, the position and angle of the telescopic powder suction tube and the powder blowing tube on the Y-shaped powder suction piece can be adjusted according to the characteristics of the product itself. The powder can be blown first and then sucked when there are holes on the surface of the product, holes and long gaps are formed between the product and the substrate, and there are gaps between the substrate and the forming cylinder. Powder suction is achieved as comprehensively and thoroughly as possible to avoid powder residue as much as possible.

[0020] In addition, the ventilation connector includes a ventilation sleeve, a spherical tube, an upper connecting tube and a lower connecting tube. In the process of adjusting the position and angle of the Y-shaped tube, the powder suction telescopic tube connected to the ventilation connector is kept as vertical or slightly inclined as possible to avoid the problem that the powder suction telescopic tube is bent during the adjustment process to affect ventilation and thus affect the powder suction effect, thereby ensuring stable powder suction in multiple states;

[0021] Finally, through the cooperation of the telescopic powder suction tube and the powder blowing tube, in the process of blowing powder to the entire forming cylinder through the powder blowing tube, the electric push rod can be controlled to fine-tune the angle of the tube mouth of the telescopic powder suction tube toward the powder blowing tube, so that the powder after blowing can be sucked in time and quickly, thereby improving practicality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of a powder cleaning box based on a 3D printing device proposed by the present invention during operation;

[0023] Figure 2 Schematic diagram of a powder cleaning box structure based on 3D printing equipment proposed by the present invention Figure 1 ;

[0024] Figure 3 Schematic diagram of a powder cleaning box structure based on 3D printing equipment proposed by the present invention Figure 2 ;

[0025] Figure 4 A schematic diagram of the bottom structure of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0026] Figure 5 A powder cleaning box based on 3D printing equipment proposed by the present invention Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 This is a schematic diagram of the structure of a Y-shaped powder suction part of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0028] Figure 7 This is a schematic diagram of the top structure of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0029] Figure 8 Schematic diagram of a powder cleaning box structure based on 3D printing equipment proposed by the present invention Figure 3 ;

[0030] Fig. 9 A bottom view of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0031] Fig.10 This is a schematic diagram of the structure of a slide rail and a slide seat of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0032] Fig.11 This is a schematic diagram of the structure of a ventilation connector for a powder cleaning box based on a 3D printing device proposed by the present invention;

[0033] Fig.12 A cross-sectional view of a ventilation connector of a powder cleaning box based on a 3D printing device proposed by the present invention;

[0034] Fig.13 This is a front view of a Y-shaped powder suction component in Example 2 of a powder cleaning box based on a 3D printing device proposed by the present invention.

[0035] In the figure: 1. Powder cleaning box; 101. Adjustment chamber; 102. Powder suction chamber; 2. Annular guide rail; 3. Guide rail slider; 4. Robotic arm; 5. Horizontal slide rail; 6. Multi-directional powder suction assembly; 7. Powder suction telescopic tube; 8. Air inlet pipe; 9. Inflatable sealing ring; 10. Powder outlet; 11. Rotary connecting pipeline; 12. Pulse generator; 13. Induction control block; 14. Quick release mechanism; 15. Forming cylinder; 16. Lifting mechanism; 17. Base plate; 18. Pad; 61, slide rail seat; 62, mounting sleeve; 63, Y-type powder suction part; 64, horizontal drive motor; 65, vertical drive motor; 66, ventilation connector; 631, Y-type tube; 632, telescopic powder suction tube; 633, powder blowing tube; 634, solenoid valve; 661, ventilation sleeve; 662, spherical tube; 663, upper tube connection; 664, lower tube connection; 6321, gasket; 6322, hose; 6323, electric push rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

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

[0038] Reference Figure 1-Figure 4 A powder cleaning box based on a 3D printing device includes a powder cleaning box body 1 located just above a forming cylinder 15 inside the printer, such as Figure 1 As shown, a lifting mechanism 16, a pad 18 connected to the lifting mechanism 16, a quick-release mechanism 14 installed at the four corners of the pad 18, and a base plate 17 quickly installed and removed by the quick-release mechanism 14 are provided in the forming cylinder 15 in the printing device. The bottom of the powder cleaning box 1 is open, and the interior is divided into an adjusting chamber 101 located at the upper end and a powder suction chamber 102 located at the lower end by a horizontal partition. The adjusting chamber 101 and the powder suction chamber 102 are sealed and separated to prevent powder from entering. An annular guide rail 2 is provided in the adjusting chamber 101. The annular guide rail 2 is designed to be square so as to absorb powder in the forming cylinder 15 with a square structure. A guide rail slider 3 installed on the annular guide rail 2 is provided at the top of the powder suction chamber 102, and the guide rail slider 3 can slide along the annular guide rail 2.

[0039] A pulse generator 12 extending into the powder suction chamber 102 is also provided in the regulating chamber 101 , and the transmitting end of the pulse generator 12 faces the parts on the substrate 17 . The pulse generator 12 can generate pulses to impact the surface of the workpiece, causing powder on the surface of the workpiece to fall off.

[0040] A frame-shaped inner groove is provided at the bottom of the powder suction chamber 102, and an inflatable sealing ring 9 for sealing the powder cleaning box 1 and the printing device table is provided in the frame-shaped inner groove. Figure 1 As shown, when the powder cleaning box 1 moves downward to the table, the inflatable sealing ring 9 is inflated to seal the entire powder suction chamber 102 .

[0041] A robotic arm 4 is installed on the bottom surface of the guide rail slider 3, and a horizontal slide rail 5 is installed at the bottom of the robotic arm 4, and a multi-directional powder suction component 6 is connected to the horizontal slide rail 5. The robotic arm 4 can drive the horizontal slide rail 5 to adjust its position up and down and front and back, and keep the horizontal slide rail 5 as a whole level. The horizontal slide rail 5 is an electric slide rail with a built-in driving source, which can drive the multi-directional powder suction component 6 to move along the horizontal slide rail 5, so that the robotic arm 4 and the horizontal slide rail 5 can realize two-way adjustment of the multi-directional powder suction component 6 to ensure that the multi-directional powder suction component 6 can absorb the powder on the entire substrate 17 and adapt to a wider range of powder suction requirements of the forming cylinder 15.

[0042] A rotating connecting pipeline 11 is provided in the middle of the adjusting chamber 101, and a powder suction telescopic tube 7 is connected between the multi-directional powder suction component 6 and the rotating connecting pipeline 11. When the multi-directional powder suction component 6 moves, the powder suction telescopic tube 7 can follow the telescopic changes. A powder outlet 10 connected to the powder suction chamber 102 is installed at the center of the top surface of the powder cleaning box 1. The powder outlet 10 receives the material cylinder outside the pipeline to realize the recovery of powder. An air inlet pipe 8 for discharging inert gas to the powder suction chamber 102 is provided at the bottom of the outer side of the powder cleaning box 1. The air inlet pipe 8 is connected to the inert gas storage tank. Under the action of the robotic arm 4, the annular guide rail 2 and the horizontal slide rail 5, the multi-directional powder suction component 6 can completely and thoroughly remove the powder in the forming cylinder 15.

[0043] Furthermore, due to the various shapes and structures of the printed parts, especially for parts with holes or grooves on the surface, the powder will enter the holes or grooves during the powder spreading process. When the parts are diverse in size and a deep gap is formed between the substrate 17, the powder will also enter the gap. At this time, the conventional powder suction method cannot meet the requirements of the above-mentioned holes, grooves, and risks of powder suction treatment, thereby affecting the powder suction effect.

[0044] Therefore, a multi-directional powder suction assembly 6 is used to replace the pipeline from multiple directions, multiple angles and different types to meet the above problems. For details, refer to Figure 1-Figure 6 The multi-directional powder suction assembly 6 includes a rail slide 61 installed on the horizontal rail 5, a mounting sleeve 62 connected to the side of the rail slide 61, and a Y-shaped powder suction piece 63 inserted in the mounting sleeve 62. The Y-shaped powder suction piece 63 includes a Y-shaped tube 631, a telescopic powder suction tube 632 and a plurality of powder blowing tubes 633. The rail slide 61 is adapted to the horizontal rail 5. When the built-in power supply of the horizontal rail 5 is working, the rail slide 61 is driven to slide on the horizontal rail 5. The telescopic powder suction tube 632 can be extended up and down to easily and quickly adjust the position of the nozzle. Figure 6The telescopic powder suction tube 632 includes a hose 6322 connected to the bottom end of the Y-shaped tube 631, gaskets 6321 arranged at both ends of the hose 6322, and an electric push rod 6323 connected between the two gaskets 6321. Two electric push rods 6323 are symmetrically arranged between the two gaskets 6321. When the two electric push rods 6323 work at the same time, the length of the hose 6322 between the two gaskets 6321 can be changed. Here, the hose 6322 can be a corrugated hose. During the contraction process of the telescopic powder suction tube 632, it is avoided to interfere with the subsequent use of the powder blowing tube 633. The top of the powder blowing tube 633 is connected to the Y-shaped tube 631 A powder blowing fan is built in, and several powder blowing tubes 633 are made of a material similar to silicone, which can maintain a vertical state and can also bend after being subjected to force, and can recover after bending. When the powder blowing tubes 633 are in a vertical state, it is convenient to insert the powder blowing tubes 633 into holes, gaps or grooves to blow out the powder. When the powder blowing tubes 633 are bent under force and fit the substrate 17 or the surface of the part, the powder blowing tubes 633 are driven to rotate, and a cleaning effect can also be achieved. The top ends of the several powder blowing tubes 633 are integrally arranged and detachably connected to the Y-tube 631, and can be adjusted according to the size of the holes or gaps on the surface of the part.

[0045] A ventilating connector 66 connected to the powder suction telescopic tube 7 is installed at the top of the Y-shaped tube 631. In order to ensure the stability of the connection state between the Y-shaped tube 631 and the powder suction telescopic tube 7 during the adjustment of the Y-shaped tube 631, a vertical driving motor 65 is connected between the slide rail slide seat 61 and the mounting sleeve 62. A horizontal driving motor 64 that drives the Y-shaped tube 631 to rotate is installed at the bottom of the mounting sleeve 62. The bottom pipe opening of the Y-shaped tube 631 is respectively connected to the telescopic powder suction tube 632 and a plurality of powder blowing tubes 633, and a solenoid valve 634 is installed at the pipe opening to open or close according to the needs of use. Close the corresponding powder blowing tube 633 and telescopic powder suction tube 632, and the Y-tube 631 follows the horizontal drive motor 64, the vertical drive motor 65 and the robot arm 4 to work, and rotate horizontally or vertically in the powder cleaning box 1 to adjust the powder blowing tube 633 toward the surface of the part and the substrate 17, or adjust the powder blowing tube 633 to be inserted into the holes on the surface of the product, the long gap formed between the product and the substrate 17, the gap between the substrate 17 and the forming cylinder 15, and the groove of the substrate 17 itself, so as to achieve a comprehensive and thorough powder suction treatment of the parts, avoid powder residue, and be more targeted.

[0046] Reference Figure 7-Figure 8 A plurality of air inlet holes are provided at the bottom of both sides of the powder cleaning box 1, and several branches of the air inlet pipe 8 are respectively installed in the air inlet holes, and the ends of the air inlet pipe 8 are connected with the inert gas storage tank, so that a group of air inlet pipes 8 can fill the powder cleaning box 1 with multiple inert gases from two directions of the powder cleaning box 1, so as to quickly fill the powder suction chamber 102 in the powder cleaning box 1 with inert gas.

[0047] Reference Figure 7-Figure 9 In order to adapt the multi-directional powder suction component 6 to move on the horizontal slide rail 5 and work around the annular guide rail 2, the rotating connecting pipeline 11 is adapted in a targeted manner. In the figure, the multi-directional powder suction component 6 is set as 2 groups for display. The top of the rotating connecting pipeline 11 passes through the powder cleaning box 1 and is provided with a connecting hole. The rotating connecting pipeline 11 is annular in the adjusting chamber 101. The bottom of the rotating connecting pipeline 11 is rotatably provided with an annular bottom plate, and a through hole for connecting the powder suction telescopic tube 7 is opened on the annular bottom plate. The top connecting hole of the rotating connecting pipeline 11 and the powder outlet 10 are both connected to the exhaust fan. When the powder suction telescopic tube 7 is driven to move, it can drive the annular bottom plate to rotate accordingly and adjust the position. The entire rotating connecting pipeline 11 adopts a sealed design to ensure the powder suction effect.

[0048] Reference Figure 4-Figure 5 and Fig.10 The upper end of the Y-shaped tube 631 is rotatably connected to the mounting sleeve 62, and is mainly mounted through a bearing to ensure a constant position during rotation. A driven gear is fixedly sleeved at the upper end of the Y-shaped tube 631 below the mounting sleeve 62, and a driving gear meshing with the driven gear is fixedly mounted on the output shaft of the horizontal driving motor 64, so that the horizontal driving motor 64 drives the Y-shaped tube 631 to rotate.

[0049] Reference Figure 5-Figure 6 and Figure 11-Figure 12 When the Y-shaped powder suction component 63 is driven by the vertical driving motor 65 or the mechanical arm 4 to rotate vertically, the powder suction telescopic tube 7 may affect the overall ventilation efficiency and thus affect the powder suction effect. Therefore, in order to ensure the use status of the powder suction telescopic tube 7, specifically, the ventilation connector 66 includes a ventilation sleeve 661 at the lower end, a spherical tube 662 rotatably installed in the ventilation sleeve 661, an upper connecting tube 663 connected to the top of the spherical tube 662 and a lower connecting tube 664 connected to the bottom of the ventilation sleeve 661. The top of the upper connecting tube 663 is connected to the bottom of the powder suction telescopic tube 7, and the bottom end of the lower connecting tube 664 is connected to the top of the Y-shaped tube 631. They are mainly connected by rotational sealing to realize the connection between the powder suction telescopic tube 7 and the Y-shaped tube 631 and ensure that the Y-shaped tube 631 can rotate.

[0050] Furthermore, the upper end of the ventilation sleeve 661 is hollow hemispherical, the middle is hollow columnar, and the bottom is hollow truncated cone. The bottom of the spherical tube 662 is provided with an outlet, and the outer side of the spherical tube 662 is in contact with the hemispherical inner wall of the ventilation sleeve 661. Figure 11-Figure 12As shown, when the spherical tube 662 rotates, it can rotate inside the ventilation sleeve 661, and always keep a constant distance between the bottom and the inside of the ventilation sleeve 661 to facilitate ventilation. At the same time, in order to guide the rotation position of the spherical tube 662, an arc groove for the connecting upper tube 663 to pass through is opened on the hemispherical surface of the ventilation sleeve 661. At this time, the connecting upper tube 663 will rotate along the arc groove square, and when it rotates to the bottom, the entire ventilation sleeve 661 will rotate vertically close to the maximum 90°, and the connecting upper tube 663 only needs to be fine-tuned, thereby ensuring that the powder suction telescopic tube 7 does not need to follow the rotation to avoid bending as much as possible.

[0051] Reference Figure 1-2 and Fig. 9 When cleaning the gap between the substrate 17 and the forming cylinder 15, since the gap between the substrate 17 and the forming cylinder 15 is frame-shaped, the top wall of the powder suction chamber 102 on one side of each corner of the annular guide rail 2 is provided with two induction control blocks 13, and a controller connecting the induction control blocks 13 and the horizontal slide rail 5 is installed in the powder cleaning box 1. When the guide rail slider 3 slides along the annular guide rail 2 and contacts the first induction control block 13 at the corner within the same time period, the horizontal slide rail 5 controls the slide rail slide seat 61 to move toward the inner wall of the powder cleaning box 1 first, and then moves away from the inner wall of the powder cleaning box 1, so that the powder blowing tube 633 remains in the gap, and then the powder blowing tube 633 blows up the powder. At this time, the telescopic powder suction tube 632 absorbs the blown powder to ensure that the frame-shaped gap between the entire substrate 17 and the forming cylinder 15 is fully cleaned.

[0052] Example 2, reference Figure 1-Figure 13 When the powder blowing tube 633 is pressed and bent against the part or substrate 17, it can be used to sweep the powder, which is similar to the structure of a broom. Each powder blowing tube 633 is equivalent to a bristle of the broom. When the Y-tube 631 rotates, it drives several powder blowing tubes 633 to rotate, thereby cleaning the surface of the part or substrate 17.

[0053] At the same time, in order to improve the powder suction effect of the telescopic powder suction tube 632, when using the powder blowing tube 633 for cleaning, Fig.13 , two electric push rods 6323 are symmetrically arranged, and the upper and lower ends of the two electric push rods 6323 are rotatably connected to the two gaskets 6321 respectively, and the one close to the powder blowing tube 633 is set as the first electric push rod, and the other is set as the second electric push rod. At this time, the second electric push rod is started to extend, and the first electric push rod remains unchanged. During the extension of the second electric push rod, the gasket 6321 located below will rotate around the bottom hinge of the first electric push rod, and drive the bottom of the hose 6322 to unfold, and finally form a telescopic powder suction tube 632 with the bottom pipe opening tilted toward the powder blowing tube 633, and finally as shown in the figure. Fig.13 As shown, it is convenient to quickly collect the cleaned powder.

[0054] Working principle: When cleaning powder, the forming cylinder 15 is first transferred to the powder cleaning equipment. The powder cleaning box 1 recognizes the position of the forming cylinder 15 and automatically drops to the top of the forming cylinder 15 and fits with the bottom wall of the printer. Then, the inflatable sealing ring 9 is inflated to seal the forming cylinder 15. After the sealing is completed, the air is washed into the powder suction chamber 102 of the powder cleaning box 1 through the air inlet pipe 8. When the oxygen content is lower than 5000ppm, the lifting mechanism 16 under the forming cylinder 15 drives the substrate 17 to move upward. The upper layer of powder is sucked from the powder suction port to the receiving cylinder driven by the air flow. The substrate 17 rises at a certain speed until the substrate 17 moves to the initial placement position in the printer.

[0055] At this time, the working procedures of the robot arm 4, the horizontal slide rail 5, and the annular guide rail 2 are adjusted according to the size of the substrate 17, so that the telescopic powder suction tube 632 moves along the surface of the part and the substrate 17 to absorb powder, and the pulse generator 12 impacts the surface of the part until the powder on the surface of the part and the surface of the substrate 17 is completely absorbed;

[0056] When there are holes, grooves, or deep gaps or holes on the surface of a part, as well as between the part and the substrate 17, when the Y-tube 631 moves to the upper position of the part, the horizontal drive motor 64 is first started, and the Y-tube 631 is driven by the horizontal drive motor 64 to rotate 180°, so that the telescopic powder suction tube 632 and a plurality of powder blowing tubes 633 are swapped, and then the electric push rod 6323 drives the telescopic powder suction tube 632 to retract upward, and closes the solenoid valve 634 on the powder blowing tube 633. According to the tilt state of the holes on the surface of the parts, the mechanical arm 4 and the vertical drive motor 65 are adjusted in both directions to align a number of powder blowing tubes 633 with the holes and then insert them into the holes or gaps to blow the powder. At the same time, the retracted telescopic powder suction tube 632 absorbs the blown powder and works along with the annular guide rail 2 until all the powder in the holes of the entire part is blown out and then absorbed. After the suction is completed, the mechanical arm 4 and the vertical drive motor 65 work again to restore the positions of the powder blowing tubes 633 and the telescopic powder suction tubes 632.

[0057] When cleaning the powder in the gap between the substrate 17 and the forming cylinder 15, first move the multi-directional powder suction assembly 6 to the position of the horizontal slide rail 5 close to the inner wall of the powder cleaning box 1, and retract the telescopic powder suction tube 632, and move the entire multi-directional powder suction assembly 6 downward until the powder blowing tube 633 is inserted into the gap between the substrate 17 and the forming cylinder 15, the annular guide rail 2 starts to work, and the guide rail slider 3 drives the powder blowing tube 633 to work along the annular guide rail 2. When the annular guide rail 2 moves in a straight line, the powder blowing tube 633 blows air to the powder in the gap, and the telescopic powder suction tube 632 sucks the powder. When the guide rail slider 3 starts to move When it reaches the corner of the circular guide rail 2, that is, the arc-shaped part, the guide rail slider 3 contacts the first induction control block 13. When the controller receives the position of the guide rail slider 3, it starts the horizontal slide rail 5 to make the slide rail slide seat 61 approach and then move away from the inner wall of the powder cleaning box 1, so that the powder blowing tube 633 is always inserted in the gap until it completes the entire arc part and contacts the second induction control block 13. At this time, the contact time is in the cooling time period, and the controller no longer receives the signal of the induction control block 13 until it moves to the next corner of the circular guide rail 2. The cooling time has passed, and the cycle is repeated until the cleaning is completed.

[0058] After the powder suction is completed, the powder cleaning box 1 moves away from the position above the forming cylinder 15, and the base plate 17 is removed by the quick release mechanism 14, and then the next step is carried out. The forming cylinder 15 also moves to the next station to work accordingly.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A powder cleaning box based on a 3D printing device, comprising a powder cleaning box body (1) located directly above a forming cylinder (15) inside the printer, characterized in that: The bottom of the powder cleaning box (1) is open, and the interior is divided into an adjustment chamber (101) located at the upper end and a powder suction chamber (102) located at the lower end by a horizontal partition. An annular guide rail (2) is arranged in the adjustment chamber (101), and a guide rail slider (3) installed on the annular guide rail (2) is arranged at the top of the powder suction chamber (102). A mechanical arm (4) is installed on the bottom surface of the guide rail slider (3), and a horizontal slide rail (5) is installed at the bottom of the mechanical arm (4). A multi-directional powder suction component (6) is connected to the horizontal slide rail (5); a rotating connecting pipeline (11) is provided in the middle of the regulating chamber (101); a powder suction telescopic tube (7) is connected between the multi-directional powder suction component (6) and the rotating connecting pipeline (11); a powder outlet (10) communicating with the powder suction chamber (102) is installed at the center of the top surface of the powder cleaning box (1); and an air inlet pipe (8) for discharging inert gas to the powder suction chamber (102) is provided at the outer bottom of the powder cleaning box (1); The multi-directional powder suction assembly (6) comprises a slide rail seat (61) mounted on a horizontal slide rail (5), a mounting sleeve (62) connected to the side of the slide rail seat (61), and a Y-shaped powder suction member (63) inserted into the mounting sleeve (62), wherein the Y-shaped powder suction member (63) comprises a Y-shaped tube (631), a telescopic powder suction tube (632), and a plurality of powder blowing tubes (633), a ventilation connector (66) connected to the telescopic powder suction tube (7) is mounted at the top of the Y-shaped tube (631), a vertical drive motor (65) is connected between the slide rail seat (61) and the mounting sleeve (62), and a horizontal drive motor (65) is mounted at the bottom of the mounting sleeve (62) for driving the Y-shaped tube (631) to rotate. The Y-shaped tube (631) is driven by a motor (64), and the bottom tube openings of the Y-shaped tube (631) are respectively connected to the telescopic powder suction tube (632) and a plurality of powder blowing tubes (633), and electromagnetic valves (634) are installed at the tube openings. The Y-shaped tube (631) works with the horizontal drive motor (64), the vertical drive motor (65) and the mechanical arm (4), and rotates horizontally or vertically in the powder cleaning box (1) to adjust the powder blowing tube (633) toward the surface of the part and the substrate (17), or adjust the powder blowing tube (633) to be inserted into the holes on the surface of the product, the long gap formed between the product and the substrate (17), the gap between the substrate (17) and the forming cylinder (15), and the groove of the substrate (17) itself; The ventilation connecting piece (66) comprises a ventilation sleeve (661) located at the lower end, a spherical tube (662) rotatably mounted in the ventilation sleeve (661), an upper connecting tube (663) connected to the top end of the spherical tube (662), and a lower connecting tube (664) connected to the bottom end of the ventilation sleeve (661), the top end of the upper connecting tube (663) being connected to the bottom of the powder suction telescopic tube (7), and the bottom end of the lower connecting tube (664) being connected to the top of the Y-shaped tube (631); The upper end of the ventilation sleeve (661) is in the shape of a hollow hemisphere, the middle part is in the shape of a hollow column, and the bottom part is in the shape of a hollow truncated cone. The bottom of the spherical tube (662) is provided with an outlet. The outer side of the spherical tube (662) fits with the hemispherical inner wall of the ventilation sleeve (661), and the hemispherical surface of the ventilation sleeve (661) is provided with an arc groove for the upper tube (663) to pass through. The telescopic powder suction tube (632) comprises a hose (6322) connected to the bottom end of the Y-shaped tube (631), gaskets (6321) arranged at both ends of the hose (6322), and an electric push rod (6323) connected between the two gaskets (6321).

2. A powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: A pulse generator (12) extending into the powder suction chamber (102) is also provided in the regulating chamber (101), and the emission end of the pulse generator (12) faces the parts on the substrate (17).

3. A powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: A frame-shaped inner groove is provided at the bottom of the powder suction chamber (102), and an inflatable sealing ring (9) for sealing the powder cleaning box (1) and the printing equipment table is provided in the frame-shaped inner groove.

4. A powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: The bottoms of both sides of the powder cleaning box (1) are provided with a plurality of air inlet holes, and a plurality of branch pipes of the air inlet pipe (8) are respectively fitted in the air inlet holes, and the ends of the air inlet pipe (8) are connected to the inert gas storage tank.

5. The powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: The top of the rotating connecting pipeline (11) passes through the powder cleaning box (1) and is provided with a connection hole. The rotating connecting pipeline (11) is annular in the regulating chamber (101). The bottom of the rotating connecting pipeline (11) is rotatably provided with an annular bottom plate, and a through hole for connecting to the powder suction telescopic tube (7) is opened on the annular bottom plate. The connection hole at the top of the rotating connecting pipeline (11) and the powder outlet (10) are both connected to an exhaust fan.

6. The powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: The upper end of the Y-shaped tube (631) is rotatably connected to the mounting sleeve (62), and a driven gear is fixedly sleeved on the upper end portion of the Y-shaped tube (631) below the mounting sleeve (62), and a driving gear meshing with the driven gear is fixedly mounted on the output shaft of the horizontal drive motor (64).

7. The powder cleaning box based on 3D printing equipment according to claim 1, characterized in that: Two induction control blocks (13) are provided on the top wall of the powder suction chamber (102) at one side of each corner of the annular guide rail (2), and a controller connecting the induction control blocks (13) and the horizontal slide rail (5) is installed in the powder cleaning box (1).

Images