A powder feeding device for long-term and continuous material addition

Abstract

The present invention discloses a powder feeding device for long-time and continuous material addition, which relates to the field of laser surface micro-additive device, including a fixed seat, a laser high-speed nozzle and two powder feeding tubes, wherein the laser high-speed nozzle is fixedly plugged in the middle of the upper end of the fixed seat, and the lower end of the laser high-speed nozzle passes through the fixed seat, and the upper end of the fixed seat is provided with two strip openings symmetrically distributed on the left and right, and the two powder feeding tubes are respectively arranged in the two strip openings and symmetrically distributed about the laser high-speed nozzle, and the middle parts of the outer tube walls of the two powder feeding tubes are rotatably connected with the side walls of the two strip openings through a rotating shaft, and the upper sides of the tube walls of the two powder feeding tubes are fixedly provided with powder inlet tubes; the upper ends of the two powder feeding tubes are fixedly provided with high-pressure blowers. The present invention can automatically scrape the particles bonded inside the two powder feeding tubes to avoid affecting the particle conveying, and can synchronously adjust the angles of the two powder feeding tubes, and adjust the overlapping positions of the particles conveyed by the two powder feeding tubes, so as to be suitable for spraying at different heights and convenient for people to use.

Description

Technical Field

[0001] The invention belongs to the technical field of laser surface micro-additive material addition, and in particular relates to a powder feeding device for long-term and continuous material addition. Background Art

[0002] Laser surface micro-additive technology is a method of using laser to heat powder to a molten or semi-molten state, and spraying and depositing it onto a pre-treated substrate surface at a certain speed to form a coating. Laser thermal spraying technology can create a special working surface on the surface of ordinary materials to achieve a series of functions such as corrosion resistance, wear resistance, high temperature resistance, oxidation resistance, and electrical conductivity. Supersonic laser surface micro-additive is based on laser surface micro-additive technology. It uses compressed gas as the acceleration medium. The powder collides with the substrate surface at an ultra-high speed under the action of compressed gas. The substrate surface and the powder undergo plastic deformation at the same time. At the same time, the powder and the substrate undergo thermal softening under the action of laser radiation, and a metallurgical bonding surface coating is quickly formed. Compared with traditional laser surface micro-additive technology, high-speed laser surface micro-additive has high metallurgical bonding efficiency, high coating density, and strong bonding between powder and substrate.

[0003] At present, when performing laser surface micro-additive, generally a laser high-speed nozzle and two powder feeding tubes are used. The two powder feeding tubes are symmetrically arranged on both sides of the laser high-speed nozzle. The particles sprayed from the two powder feeding tubes overlap in and out on the spray line of the laser high-speed nozzle, and then softened and deposited, thereby improving the spraying effect. However, in the prior art, when the particles are transported through the two powder feeding tubes, the particles are easily adhered to the inner tube wall of the powder feeding tube. After long-term use, more particles adhered inside the powder feeding tube will accumulate, and the inside of the powder feeding tube lacks a structure for scraping off the particles, which easily affects the transportation of the particles. In addition, the two powder feeding tubes are generally fixed, and the angles of the two powder feeding tubes cannot be adjusted. The overlapping position of the particles sprayed from the two powder feeding tubes is fixed, which is difficult to meet the requirements of spraying at different heights, affecting people's use. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a powder feeding device for long-term and continuous additive manufacturing, which effectively solves the problem that when particles are currently transported through two powder feeding tubes, particles are easily adhered to the inner tube wall of the powder feeding tube. After long-term use, more particles adhered to the inside of the powder feeding tube will accumulate, and the inside of the powder feeding tube lacks a structure for scraping off the particles, which easily affects the transportation of the particles. In addition, the two powder feeding tubes are generally fixed, and the angles of the two powder feeding tubes cannot be adjusted. The overlapping position of the particles sprayed from the two powder feeding tubes is fixed, which is difficult to meet the requirements for spraying at different heights, affecting people's use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder feeding device for long-term and continuous material addition, comprising a fixed seat, a laser high-speed nozzle and two powder feeding tubes, wherein the laser high-speed nozzle is fixedly plugged in the middle of the upper end of the fixed seat, and the lower end of the laser high-speed nozzle passes through the fixed seat, and the upper end of the fixed seat is provided with two strip openings symmetrically distributed on the left and right, and the two powder feeding tubes are respectively arranged in the two strip openings and symmetrically distributed about the laser high-speed nozzle, and the middle parts of the outer tube walls of the two powder feeding tubes are rotatably connected to the side walls of the two strip openings through a rotating shaft, and the upper sides of the tube walls of the two powder feeding tubes are fixedly provided with powder inlet tubes;

[0006] A high-pressure fan is fixedly installed at the upper end of the two powder delivery pipes, and a scraping mechanism for cleaning the inside of the two powder delivery pipes is arranged inside the two powder delivery pipes. A shell is fixedly installed on the front side of the fixed seat, and the front ends of the two rotating shafts extend to the inside of the shell. The inside of the shell is provided with an angle adjustment mechanism that can drive the two powder delivery pipes to rotate relative to each other.

[0007] Preferably, the cleaning mechanism includes a spiral scraper, an impeller and a round rod, the spiral scraper is arranged in the powder delivery pipe, and the rod wall of the spiral scraper is abutted against the inner tube wall of the powder delivery pipe and can rotate, the impeller is arranged inside the powder delivery pipe at one end close to the high-pressure fan, the center axis of the impeller is fixedly connected to the spiral scraper through a round rod, the round rod is rotatably connected to a bracket through a first bearing, and the end of the bracket is fixedly connected to the inner tube wall of the powder delivery pipe.

[0008] Preferably, the angle adjustment mechanism includes a worm, a worm wheel, a rotating rod and two sets of gear pairs, the rotating rod is transversely arranged inside the shell, and both ends of the rod wall of the rotating rod are rotatably connected to a fixed plate through a second bearing, the two fixed plates are fixedly arranged in the shell, the two ends of the two rotating rods are respectively connected to the two rotating shafts through two sets of gear pairs, the worm wheel is fixedly sleeved with the middle part of the rod wall of the rotating rod, the worm is vertically arranged in the shell and meshingly connected with the worm wheel, the upper and lower ends of the worm are respectively rotatably connected to the upper and lower sides of the shell through a third bearing, and the upper end of the worm extends to the top of the shell and is fixedly connected to a knob.

[0009] Preferably, each group of the gear pairs includes a first bevel gear and a second bevel gear, the two first bevel gears are fixedly connected to the left and right ends of the rotating rod, the two second bevel gears are respectively fixedly connected to the front ends of the two rotating shafts, and the two first bevel gears are respectively meshed with the two second bevel gears.

[0010] Preferably, both powder feeding pipes are provided with regulating valves capable of adjusting the powder feeding amount.

[0011] Preferably, a pointer is fixedly provided on the valve stem of the two regulating valves, the pointer is located outside the powder inlet pipe, the outer side wall of the powder inlet pipe is provided with scale lines evenly distributed in a ring shape around the valve stem, and the pointer points to one of the scale lines.

[0012] Preferably, a transparent baffle is provided below the fixed seat, and a circular opening vertically aligned with the laser high-speed nozzle is provided in the middle of the upper end of the transparent baffle, and a guide assembly is provided at the lower end of the fixed seat, and the transparent baffle can slide vertically below the fixed seat through the guide assembly, and the lower end of the worm extends to the bottom of the shell and is fixedly connected to a threaded rod, and a moving block is fixedly connected to the middle of the front side of the transparent baffle, and a threaded hole is provided at the upper end of the moving block and is threadedly sleeved with the threaded rod.

[0013] Preferably, the guide assembly includes a plurality of guide rods, which are respectively vertically fixed at the four corners of the lower end of the fixing seat, and guide holes are respectively opened at the four corners of the upper end of the transparent baffle, and the transparent baffle is slidably mounted on the plurality of guide rods through the plurality of guide holes, the number of the guide rods is set to four, and the number of the guide holes is also set to four.

[0014] Preferably, the side wall of each guide hole is provided with a plurality of spherical grooves, the plurality of spherical grooves are evenly distributed in a ring shape, a ball is rolled inside each spherical groove, and the plurality of ball rollers are abutted against the rod wall of the guide rod and rolled with the guide rod.

[0015] Preferably, the transparent baffle is a box-type structure with an opening upward, and through holes are provided on both sides of the transparent baffle, and a first baffle plate and a second baffle plate are respectively arranged in the two through holes, and the first baffle plate and the second baffle plate are both moved up and down by a cylinder, and a conveying member whose upper end surface is higher than the bottom wall of the transparent baffle is provided at the bottom of the transparent baffle, and an air intake pipe is also provided in the side wall of the transparent baffle, and the upper end of the air intake pipe is connected to an external air supply pipeline, and a valve is arranged on the lower end of the air intake pipe, and the valve and the transparent baffle are connected by a spring so that the valve can move up and down, and the lower end of the air intake pipe is connected to the outside through a fourth pipe, and the valve can close the fourth pipe, and a first pipe is installed on the upper end of the second baffle plate, and vertical third pipes with openings at the lower ends are evenly arranged inside the second baffle plate, and the first pipe and the third pipe are connected through the second pipe, and when the second baffle plate moves upward and causes the first pipe to push the valve upward, the first pipe and the fourth pipe can be connected.

[0016] Technical effects and advantages of the present invention:

[0017] 1. When performing laser surface micro-additive, particles are transported to the inside of two powder delivery tubes through two powder inlet tubes, and air is blown into the two powder delivery tubes through two high-pressure fans. Particles are ejected through the two powder delivery tubes and then softened and deposited by the laser high-speed nozzle. The two high-pressure fans drive two impellers to rotate when blowing air, and the rotation of the two impellers drives two round rods to rotate respectively. The two round rods drive two spiral scrapers to rotate in the powder delivery tubes, so that particles on the inner wall of the two powder delivery tubes can be scraped off to prevent particles from adhering to the powder delivery tubes and affecting particle transportation;

[0018] 2. When the angles of the two powder feeding tubes need to be adjusted, the knob is turned to drive the worm to rotate, the worm rotation drives the worm wheel to rotate, the worm wheel drives the rotating rod to rotate, the rotating rod drives the two first bevel gears to rotate, the two first bevel gears respectively drive the two second bevel gears to rotate, and the two second bevel gears respectively drive the two powder feeding tubes to rotate through the two rotating shafts, so that the angles of the two powder feeding tubes can be adjusted, and the two powder feeding tubes rotate synchronously relative to each other, so that the particles sprayed from the two powder feeding tubes overlap on the spray line of the laser high-speed nozzle, which is suitable for laser surface micro-additives of different heights and convenient for people to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The figures are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the drawings:

[0020] Figure 1 It is a front structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixing seat, the laser high-speed nozzle and two powder feeding pipes of the present invention;

[0022] Figure 3 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the powder delivery tube of the present invention;

[0026] Figure 7 It is a side structural schematic diagram of the powder inlet pipe of the present invention;

[0027] Figure 8 is a schematic diagram of the three-dimensional structure of the transparent baffle of the present invention;

[0028] Fig. 9 is a schematic diagram of a top cross-sectional structure of a transparent baffle of the present invention;

[0029] Fig.10 It is a structural schematic diagram of another embodiment of the transparent blocking member of the present invention;

[0030] Fig.11 is a schematic cross-sectional structural diagram of a second blocking plate of the present invention;

[0031] Fig.12 For the present invention Fig.11 A is an enlarged structural diagram;

[0032] Fig.13 It is a schematic diagram of the lower end structure of the air intake duct of the present invention.

[0033] In the figure: 1. fixed seat; 2. laser high-speed nozzle; 3. powder delivery pipe; 4. powder inlet pipe; 5. high-pressure fan; 6. shell; 7. spiral scraper; 8. impeller; 9. bracket; 10. worm; 11. worm wheel; 12. rotating rod; 13. fixed plate; 14. knob; 15. first bevel gear; 16. second bevel gear; 17. regulating valve; 18. pointer; 19. transparent baffle; 20. moving block; 21. threaded rod; 22. guide rod; 23. ball; 24. through hole; 25. first baffle plate; 26. cylinder; 27. conveying member; 28. air inlet pipe; 29. ​​second baffle plate; 30. first pipeline; 31. second pipeline; 32. third pipeline; 34. valve; 35. fourth pipeline; 36. spring. DETAILED DESCRIPTION

[0034] The present invention provides Figure 1-9 A powder feeding device for long-term and continuous material addition is shown, comprising a fixed seat 1, a laser high-speed nozzle 2 and two powder feeding tubes 3, wherein the laser high-speed nozzle 2 is fixedly plugged in the middle of the upper end of the fixed seat 1, and the lower end of the laser high-speed nozzle 2 passes through the fixed seat 1, and the upper end of the fixed seat 1 is provided with two strip openings symmetrically distributed on the left and right, and the two powder feeding tubes 3 are respectively arranged in the two strip openings and symmetrically distributed about the laser high-speed nozzle 2, and the middle parts of the outer tube walls of the two powder feeding tubes 3 are rotatably connected with the side walls of the two strip openings through a rotating shaft, and the upper sides of the tube walls of the two powder feeding tubes 3 are fixedly provided with powder inlet tubes 4;

[0035] A high-pressure fan 5 is fixedly installed at the upper end of the two powder delivery pipes 3, and a scraping mechanism for cleaning the inside of the two powder delivery pipes 3 is installed inside the two powder delivery pipes 3. A shell 6 is fixedly installed on the front side of the fixed seat 1. The front ends of the two rotating shafts extend to the inside of the shell 6. The inside of the shell 6 is provided with an angle adjustment mechanism that can drive the two powder delivery pipes 3 to rotate relative to each other.

[0036] like Figure 6 The cleaning mechanism includes a spiral scraper 7, an impeller 8 and a round rod. The spiral scraper 7 is arranged in the powder delivery tube 3, and the rod wall of the spiral scraper 7 abuts against the inner tube wall of the powder delivery tube 3 and can rotate. The impeller 8 is arranged at one end of the powder delivery tube 3 near the high-pressure fan 5. The central axis of the impeller 8 is fixedly connected to the spiral scraper 7 through the round rod. The round rod is rotatably connected to the bracket 9 through the first bearing. The end of the bracket 9 is fixedly connected to the inner tube wall of the powder delivery tube 3. When laser surface micro-addition is performed, the two powder delivery tubes are respectively supplied with powder through the two powder inlet pipes 4. 3, two high-pressure fans 5 are used to blow air into the two powder delivery pipes 3 respectively, the particles are ejected through the two powder delivery pipes 3, and then softened and deposited by the laser high-speed nozzle 2, and the two high-pressure fans 5 respectively drive the two impellers 8 to rotate when blowing air, and the rotation of the two impellers 8 respectively drives the two round rods to rotate, and the two round rods respectively drive the two spiral scrapers 7 to rotate in the powder delivery pipe 3, so that the particles on the inner wall of the two powder delivery pipes 3 can be scraped off to avoid the particles sticking to the powder delivery pipe 3 and affecting the particle transportation.

[0037] like Figure 3 and Figure 4 As shown, the angle adjustment mechanism includes a worm 10, a worm wheel 11, a rotating rod 12 and two sets of gear pairs. The rotating rod 12 is horizontally arranged inside the housing 6, and both ends of the rod wall of the rotating rod 12 are rotatably connected to a fixed plate 13 through a second bearing. The two fixed plates 13 are fixedly arranged in the housing 6. The two ends of the two rotating rods 12 are respectively connected to the two rotating shafts through two sets of gear pairs. The worm wheel 11 is fixedly sleeved with the middle part of the rod wall of the rotating rod 12. The worm 10 is vertically arranged in the housing 6 and meshed with the worm wheel 11. The upper and lower ends of the worm 10 are rotatably connected to the upper and lower sides of the housing 6 through a third bearing, and the upper end of the worm 10 extends to the top of the housing 6 and is fixedly connected to a knob 14.

[0038] At the same time, each gear pair includes a first bevel gear 15 and a second bevel gear 16. The two first bevel gears 15 are fixedly connected to the left and right ends of the rotating rod 12, and the two second bevel gears 16 are respectively fixedly connected to the front ends of the two rotating shafts. The two first bevel gears 15 are respectively meshed and connected with the two second bevel gears 16.

[0039] When the angles of the two powder delivery tubes 3 need to be adjusted, the knob 14 is turned to drive the worm 10 to rotate, the worm 10 rotates to drive the worm wheel 11 to rotate, the worm wheel 11 drives the rotating rod 12 to rotate, the rotating rod 12 drives the two first bevel gears 15 to rotate, the two first bevel gears 15 respectively drive the two second bevel gears 16 to rotate, and the two second bevel gears 16 respectively drive the two powder delivery tubes 3 to rotate through the two rotating shafts, so that the angles of the two powder delivery tubes 3 can be adjusted, and the two powder delivery tubes 3 rotate synchronously relative to each other, so that the particles ejected from the two powder delivery tubes 3 overlap on the ejection line of the laser high-speed nozzle 2, which is suitable for laser surface micro-additives at different heights and convenient for people to use.

[0040] like Figure 1 As shown, the two powder inlet pipes 4 are both provided with regulating valves 17 capable of adjusting the powder inlet amount, so as to facilitate adjusting the powder inlet speed of the two powder inlet pipes 4.

[0041] like Figure 1 and Figure 7 As shown, a pointer 18 is fixedly provided on the valve stems of the two regulating valves 17, and the pointer 18 is located outside the powder inlet pipe 4. The outer wall of the powder inlet pipe 4 is provided with scale lines evenly distributed in a ring shape around the valve stem. The pointer 18 points to one of the scale lines, which is convenient for precise adjustment of the two regulating valves 17 to make the powder feeding speeds of the two powder inlet pipes 4 the same.

[0042] like Figure 1 , Figure 8 and Fig. 9 As shown, a transparent baffle 19 is arranged below the fixed seat 1, and a circular opening vertically aligned with the laser high-speed nozzle 2 is opened in the middle of the upper end of the transparent baffle 19, and a guide assembly is arranged at the lower end of the fixed seat 1. The transparent baffle 19 can slide vertically below the fixed seat 1 through the guide assembly. The lower end of the worm 10 extends to the bottom of the shell 6 and is fixedly connected with a threaded rod 21. A moving block 20 is fixedly connected to the middle of the front side of the transparent baffle 19, and a threaded hole is opened at the upper end of the moving block 20 and is threadedly sleeved with the threaded rod 21. When the knob 14 is turned to drive the worm wheel 10 to rotate, the worm wheel also drives the threaded rod 21 to rotate. The rotation of the threaded rod 21 can drive the transparent baffle 19 to move vertically, so that when adjusting the angles of the two powder feeding tubes 3, the height of the transparent baffle 19 can be adjusted synchronously, and the splashed particles can be blocked by the transparent baffle 19 to avoid affecting the spraying effect.

[0043] like Figure 1 and Fig. 9As shown, the guide assembly includes a plurality of guide rods 22, and the plurality of guide rods 22 are respectively vertically fixed at the four corners of the lower end of the fixing seat 1, and guide holes are opened at the four corners of the upper end of the transparent baffle 19, and the transparent baffle 19 is slidably mounted with the plurality of guide rods 22 through the plurality of guide holes. The number of guide rods is set to four, and the number of guide holes is also set to four, which can guide the vertical movement of the transparent baffle 19, so that the transparent baffle 19 is more stable when moving vertically.

[0044] like Fig. 9 As shown, the side wall of each guide hole is provided with a plurality of spherical grooves, which are evenly distributed in a ring shape, and a ball 23 is rolled inside each spherical groove, and the plurality of balls 23 are abutted against the rod wall of the guide rod 22 and rolled with the guide rod 22. The plurality of balls 23 can reduce the friction between the guide rod 22 and the transparent baffle 19, making the transparent baffle 19 more flexible and stable when moving.

[0045] The working principle of the present invention is as follows: when performing laser surface micro-additive, particles are transported to the inside of two powder delivery tubes 3 through two powder inlet tubes 4, and air is blown into the two powder delivery tubes 3 through two high-pressure fans 5. The particles are ejected through the two powder delivery tubes 3, and then softened and deposited by the laser high-speed nozzle 2. The two high-pressure fans 5 drive two impellers 8 to rotate respectively when blowing air, and the rotation of the two impellers 8 drives two round rods to rotate respectively, and the two round rods drive two spiral scraping rods 7 to rotate in the powder delivery tube 3, so that the particles on the inner side walls of the two powder delivery tubes 3 can be scraped off to prevent the particles from adhering to the powder delivery tube 3 and affecting the particle transportation;

[0046] When the angles of the two powder feeding tubes 3 need to be adjusted, the knob 14 is turned to drive the worm 10 to rotate, the worm 10 drives the worm wheel 11 to rotate, the worm wheel 11 drives the rotating rod 12 to rotate, the rotating rod 12 drives the two first bevel gears 15 to rotate, the two first bevel gears 15 respectively drive the two second bevel gears 16 to rotate, the two second bevel gears 16 respectively drive the two powder feeding tubes 3 to rotate through the two rotating shafts, so that the angles of the two powder feeding tubes 3 can be adjusted, and the two powder feeding tubes 3 rotate synchronously relative to each other, so that the particles sprayed from the two powder feeding tubes 3 overlap on the spray line of the laser high-speed nozzle 2, which is suitable for laser surface micro-additives of different heights and convenient for people to use.

[0047] As shown in Figures 10-13, in some embodiments, the transparent baffle 19 is a box-type structure with an opening upward to prevent the paint from being sprayed into the external environment during the spraying process. Through holes 24 are provided on both sides of the transparent baffle 19, and a first baffle plate 25 and a second baffle plate 29 are respectively provided in the two through holes 24, and the first baffle plate 25 and the second baffle plate 29 are both moved up and down by a cylinder 26. A conveying member 27 with an upper end surface higher than the bottom wall of the transparent baffle 19 is provided at the bottom of the transparent baffle 19, and an air inlet pipe 28 is also provided in the side wall of the transparent baffle 19. The upper end of the air inlet pipe 28 is connected to the external air pipeline, and the lower end thereof is covered with a Valve 34, the valve 34 is connected to the transparent baffle 19 by a spring 36 so that the valve 34 can move up and down, the lower end of the intake pipe 28 is connected to the outside through the fourth pipe 35, the valve 34 can close the fourth pipe 35, the first pipe 30 is installed on the upper end of the second baffle plate 29, and the third pipe 32 with a vertical and lower end opening is evenly arranged inside the second baffle plate 29. The first pipe 30 and the third pipe 32 are connected through the second pipe 31. When the second baffle plate 29 moves upward and the first pipe 30 pushes the valve 34 upward, the first pipe 30 and the fourth pipe 35 can be connected.

[0048] The workpiece to be sprayed can enter the transparent baffle 19 through the through hole 24. After entering, in order to prevent the spray material from escaping to the outside, the through hole 24 can be closed. After the spraying is completed, the second baffle 29 moves upward, and the conveying member 27 moves the workpiece out. In this process, the second baffle 29 will move upward to the highest position and push the valve 34 upward, so that the hot air from the outside can be blown to the surface of the workpiece along the air inlet pipe 28, the fourth pipe 35, the first pipe 30, the second pipe 31, and the third pipe 32, so as to dry the workpiece after spraying, thereby avoiding affecting the spraying effect.

[0049] In addition, in order to ensure that hot air does not escape in large quantities when the valve 34 is connected to the first pipe 30, a first inclined surface extending outward from top to bottom is provided on the lower end surface of the valve 34, and a second inclined surface matching the first pipe 30 is provided at the upper end. The upper position of the first pipe 30 is consistent with the inner wall size of the valve 34, and an inner cavity with a larger inner diameter is provided at its lower part, which can prevent the leakage of hot air.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder feeding device for long-term and continuous material addition, characterized in that: It comprises a fixed seat (1), a laser high-speed nozzle (2) and two powder delivery pipes (3), wherein the laser high-speed nozzle (2) is fixedly plugged into the middle of the upper end of the fixed seat (1), and the lower end of the laser high-speed nozzle (2) passes through the fixed seat (1), and the upper end of the fixed seat (1) is provided with two strip openings symmetrically distributed on the left and right, and the two powder delivery pipes (3) are respectively arranged in the two strip openings and are symmetrically distributed about the laser high-speed nozzle (2), and the middle parts of the outer tube walls of the two powder delivery pipes (3) are rotatably connected to the side walls of the two strip openings through a rotating shaft, and the upper sides of the tube walls of the two powder delivery pipes (3) are fixedly provided with powder inlet pipes (4); A high-pressure fan (5) is fixedly provided at the upper ends of the two powder delivery pipes (3), and a scraping mechanism capable of cleaning the inside of the powder delivery pipes (3) is provided inside the two powder delivery pipes (3); a shell (6) is fixedly provided on the front side of the fixed seat (1), and the front ends of the two rotating shafts extend into the inside of the shell (6); and an angle adjustment mechanism capable of driving the two powder delivery pipes (3) to rotate relative to each other is provided inside the shell (6); The scraping mechanism comprises a spiral scraper (7), an impeller (8) and a round rod, wherein the spiral scraper (7) is arranged in the powder delivery pipe (3), and the rod wall of the spiral scraper (7) abuts against the inner tube wall of the powder delivery pipe (3) and can rotate, the impeller (8) is arranged inside the powder delivery pipe (3) at one end close to the high-pressure fan (5), the central axis of the impeller (8) is fixedly connected to the spiral scraper (7) through the round rod, the round rod is rotatably connected to a bracket (9) through a first bearing, and the end of the bracket (9) is fixedly connected to the inner tube wall of the powder delivery pipe (3); The angle adjustment mechanism comprises a worm (10), a worm wheel (11), a rotating rod (12) and two sets of gear pairs. The rotating rod (12) is arranged transversely inside the housing (6), and both ends of the rod wall of the rotating rod (12) are rotatably connected to a fixing plate (13) via a second bearing. The two fixing plates (13) are fixedly arranged in the housing (6). The two ends of the two rotating rods (12) are respectively transmission-connected to two rotating shafts via two sets of gear pairs. The worm wheel (11) is fixedly sleeved with the middle part of the rod wall of the rotating rod (12). The worm (10) is vertically arranged in the housing (6) and meshingly connected with the worm wheel (11). The upper and lower ends of the worm (10) are respectively rotatably connected to the upper and lower sides of the housing (6) via a third bearing, and the upper end of the worm (10) extends to the top of the housing (6) and is fixedly connected to a knob (14).

2. A powder feeding device for long-term, continuous material addition according to claim 1, characterized in that: Each group of the gear pairs comprises a first bevel gear (15) and a second bevel gear (16), the two first bevel gears (15) being fixedly connected to the left and right ends of the rotating rod (12), the two second bevel gears (16) being fixedly connected to the front ends of the two rotating shafts respectively, and the two first bevel gears (15) being meshingly connected to the two second bevel gears (16) respectively.

3. A powder feeding device for long-term, continuous material addition according to claim 2, characterized in that: Both powder inlet pipes (4) are provided with regulating valves (17) capable of adjusting the powder inlet amount.

4. A powder feeding device for long-term, continuous material addition according to claim 3, characterized in that: A pointer (18) is fixedly provided on the valve stem of each of the two regulating valves (17), and the pointer (18) is located outside the powder inlet pipe (4). The outer wall of the powder inlet pipe (4) is provided with scale lines evenly distributed in a ring shape around the valve stem, and the pointer (18) points to one of the scale lines.

5. A powder feeding device for long-term and continuous material addition according to claim 4, characterized in that: A transparent baffle (19) is arranged below the fixed seat (1), and a circular opening is provided in the middle of the upper end of the transparent baffle (19) and is vertically aligned with the laser high-speed nozzle (2). A guide assembly is provided at the lower end of the fixed seat (1), and the transparent baffle (19) can slide vertically below the fixed seat (1) through the guide assembly. The lower end of the worm (10) extends to the bottom of the shell (6) and is fixedly connected to a threaded rod (21). A moving block (20) is fixedly connected to the middle of the front side of the transparent baffle (19), and a threaded hole is provided at the upper end of the moving block (20) and is threadedly sleeved with the threaded rod (21).

6. A powder feeding device for long-term, continuous material addition according to claim 5, characterized in that: The guide assembly comprises a plurality of guide rods (22), the plurality of guide rods (22) being respectively fixed vertically at the four corners of the lower end of the fixing seat (1), the four corners of the upper end of the transparent blocking member (19) being provided with guide holes, and the transparent blocking member (19) being respectively slidably mounted on the plurality of guide rods (22) through the plurality of guide holes, the number of the guide rods being set to four, and the number of the guide holes being also set to four.

7. A powder feeding device for long-term, continuous material addition according to claim 6, characterized in that: The side wall of each guide hole is provided with a plurality of spherical grooves, the plurality of spherical grooves are evenly distributed in a ring shape, a ball (23) is rollingly arranged inside each spherical groove, and the plurality of balls (23) are abutted against the rod wall of the guide rod (22) and are rollingly arranged with the guide rod (22).

8. A powder feeding device for long-term, continuous material addition according to claim 7, characterized in that: The transparent baffle (19) is a box-shaped structure with an opening upward. Through holes (24) are provided on both sides of the transparent baffle (19). A first baffle plate (25) and a second baffle plate (29) are respectively provided in the two through holes (24). The first baffle plate (25) and the second baffle plate (29) are both moved up and down by a cylinder (26). A conveying member (27) having an upper end surface higher than the bottom wall of the transparent baffle (19) is provided at the bottom of the transparent baffle (19). An air inlet pipe (28) is also provided in the side wall of the transparent baffle (19). The upper end of the air inlet pipe (28) is connected to an external air delivery pipeline. A valve (34) is provided on the lower end of the air inlet pipe. A spring is provided between the valve (34) and the transparent baffle (19). The second baffle plate (29) is connected to a spring (36) so that the valve (34) can move up and down. The lower end of the intake pipe (28) is connected to the outside through a fourth pipe (35). The valve (34) can close the fourth pipe (35). The upper end of the second baffle plate (29) is provided with a first pipe (30). A third pipe (32) is evenly arranged vertically and open at the lower end inside the second baffle plate (29). The first pipe (30) and the third pipe (32) are connected through a second pipe (31). When the second baffle plate (29) moves upward and causes the first pipe (30) to push the valve (34) upward, the first pipe (30) and the fourth pipe (35) can be connected.

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