Powder conveying mechanism and powder conveying type additive manufacturing equipment

Abstract

The invention relates to the technical field of additive manufacturing, and discloses a powder transmitting mechanism and powder transmitting type additive manufacturing equipment, and the powder transmitting mechanism comprises a powder transmitting laser disc which is provided with a processing energy beam transmission channel and a plurality of powder transmitting laser beam control units; the processing energy beam transmission channel is used for transmitting the processing energy beam to a processing platform of the additive manufacturing equipment; the powder transmitting laser beam control unit is used for converging powder transmitting laser beams and controlling the waist position of the powder transmitting laser beams to move between the machining platform and a feeding disc of the additive manufacturing equipment, and the powder transmitting laser beams are used for transferring raw materials for additive manufacturing from the feeding disc to the machining platform based on the optical tweezers effect and conducting preheating treatment on the raw materials. Through a brand-new powder transferring mode, raw materials for additive manufacturing are preheated in the powder transferring process, and the technical problems that in the existing additive manufacturing technology, a preheating and powder spreading mechanism is large in size and complex in structure are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and particularly to a powder feeding mechanism and a powder feeding type additive manufacturing device. Background Art

[0002] Additive Manufacturing (AM), also known as 3D printing, is based on three-dimensional model data. Using powdery metals or plastics and other bondable materials, it directly manufactures entities or parts that are exactly the same as the corresponding digital models by means of layer-by-layer material stacking.

[0003] In order to achieve better additive manufacturing effects, current additive manufacturing technologies usually require preheating the raw materials such as metal powders used for additive manufacturing in advance. In addition, current additive manufacturing technologies all adopt a powder spreading printing scheme, that is, in the printing process, operations such as layer-by-layer printing coverage need to be carried out through a powder spreading mechanism. The powder spreading mechanism occupies a large volume and usually has a relatively complex structure. Summary of the Invention

[0004] In view of this, the present invention provides a powder feeding mechanism and a powder feeding type additive manufacturing device to solve or partially solve the technical problems of large volume and complex structure of the preheating and powder spreading mechanisms in existing additive manufacturing technologies.

[0005] The technical solutions proposed by the present invention are as follows:

[0006] In a first aspect of the present invention, there is provided a powder feeding mechanism applied to a powder feeding type additive manufacturing device, including: a powder feeding laser disk, on which a processing energy beam transmission channel and a plurality of powder feeding laser beam control units are provided; the processing energy beam transmission channel is used to transmit the processing energy beam to the processing platform of the additive manufacturing device; the powder feeding laser beam control unit is used to converge the powder feeding laser beam and control the movement of the beam waist position of the powder feeding laser beam between the processing platform and the loading tray of the additive manufacturing device. The powder feeding laser beam is used to transfer the raw materials for additive manufacturing from the loading tray to the processing platform based on the optical tweezer effect and preheat the raw materials.

[0007] In an optional embodiment, the powder feeding laser beam control unit includes a focusing unit and a motion control unit. The focusing unit is used to converge the powder feeding laser beam, and the motion control unit is used to control the movement path of the powder feeding laser beam according to a control instruction.

[0008] In an optional embodiment, a driving mechanism and a reflection unit are provided on the motion control unit. The output end of the driving mechanism is connected to the reflection unit to adjust the tilt angle of the reflection unit.

[0009] In an alternative embodiment, the powder delivery mechanism further includes a first light source disposed on the powder delivery laser disk, and the first light source is configured to output a powder delivery laser beam to the powder delivery laser beam control unit.

[0010] In an alternative embodiment, the powder delivery mechanism further includes a laser beam splitter configured to split the processing energy beam into a plurality of powder delivery laser beams and transmit the powder delivery laser beams to the powder delivery laser beam control unit.

[0011] In an alternative embodiment, the loading tray surrounds the outer periphery of the processing platform, and a circumferentially surrounding boss is provided on the outer periphery of the loading tray.

[0012] In an alternative embodiment, the powder delivery laser disk has an annular structure, the processing energy beam transmission channel is provided in the middle of the powder delivery laser disk, and the powder delivery laser beam control units are arranged at intervals along the circumference on the periphery of the processing energy beam transmission channel.

[0013] In an alternative embodiment, the energy density per unit area of the powder delivery laser beam is 5×10 4 W / cm 2 to 5×10 5 W / cm 2 .

[0014] A second aspect of the present invention provides a powder delivery type additive manufacturing apparatus, including a processing energy beam output unit and a powder delivery mechanism according to any one of the first aspect of the present invention, and the processing energy beam output unit is configured to output a processing energy beam.

[0015] In an alternative embodiment, the processing energy beam output unit includes: an energy source configured to output a processing energy beam; a shaping component configured to shape the processing energy beam; a focusing adjustment component including a galvanometer and a field lens, the galvanometer is configured to adjust the focusing coordinates of the processing energy beam, and the field lens is configured to converge the processing energy beam.

[0016] The present invention has the following beneficial effects:

[0017] A powder delivery mechanism and a powder delivery type additive manufacturing apparatus of the present invention are provided. By providing a processing energy beam transmission channel and a plurality of powder delivery laser beam control units on the powder delivery laser disk, the powder delivery laser beam control units are used to converge the powder delivery laser beam, and the beam waist position of the powder delivery laser beam is controlled to move between the processing platform and the loading tray of the additive manufacturing apparatus. The powder delivery laser beam can transfer the raw material for additive manufacturing from the loading tray to the processing platform based on the optical tweezer effect and preheat the raw material, which facilitates the processing energy beam to quickly process the raw material on the processing platform of the additive manufacturing apparatus. Through a new powder delivery method, the raw material for additive manufacturing is preheated during the powder delivery process, solving the technical problems of large volume and complex structure of the preheating and powder spreading mechanisms in the existing additive manufacturing technology, improving the processing efficiency, and realizing high-quality additive manufacturing. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the powder feeding mechanism in the embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the powder feeding laser disc in the embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the powder feeding laser beam control unit in the embodiment of the present invention;

[0022] Figure 4 It is a top view of the loading tray and the processing platform in the embodiment of the present invention;

[0023] Figure 5 It is a cross-sectional view of the loading tray in the embodiment of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the powder feeding additive manufacturing equipment in the embodiment of the present invention;

[0025] Description of the Reference Numerals:

[0026] 1. Powder feeding laser disc; 11. Processing energy beam transmission channel; 12. Powder feeding laser beam control unit; 121. Focusing unit; 122. Motion control unit; 2. Processing platform; 3. Loading tray; 4. Energy source; 5. Shaping component; 6. Galvo scanner; 7. Field lens. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] In view of the technical problems in the related additive manufacturing technology that a heating mechanism is required to preheat raw materials such as metal powder respectively, and a powder spreading mechanism is required to spread powder layer by layer, resulting in a large overall volume and high cost of the additive manufacturing equipment, an embodiment of the present invention provides a powder delivery mechanism and a powder delivery type additive manufacturing equipment.

[0032] Such as Figure 1 and Figure 2 As shown in [figures not provided], a powder delivery mechanism according to an embodiment of the present invention is applied to a powder delivery type additive manufacturing equipment, and includes:

[0033] A powder delivery laser disc 1, on which a processing energy beam transmission channel 11 and a plurality of powder delivery laser beam control units 12 are provided;

[0034] The processing energy beam transmission channel 11 is used to transmit the processing energy beam to the processing platform 2 of the additive manufacturing equipment;

[0035] The powder delivery laser beam control unit 12 is used to converge the powder delivery laser beam and control the movement of the beam waist position of the powder delivery laser beam between the processing platform 2 and the loading tray 3 of the additive manufacturing equipment. The powder delivery laser beam is used to transfer the raw materials for additive manufacturing from the loading tray 3 to the processing platform 2 based on the optical tweezer effect and preheat the raw materials.

[0036] Specifically, in the powder delivery type additive manufacturing equipment, the processing energy beam is output by the processing energy beam output unit to the processing platform 2 to solidify and form the raw materials on the processing platform 2. The processing energy beam transmission channel 11 is a through hole provided in the middle of the powder delivery laser disc 1, and the processing energy beam is transmitted to the processing platform 2 through this through hole.

[0037] In one example, the processing energy beam is generally a laser beam generated by a laser. The raw materials for additive manufacturing are metal powders such as copper powder and aluminum powder.

[0038] The powder-feeding laser beam can be output by additionally setting a laser source on the powder-feeding laser disc 1, or when the processing energy beam is a laser beam, it can be laser split to generate the corresponding powder-feeding laser beam.

[0039] A number of powder-feeding laser beam control units 12 are provided on the powder-feeding laser disc 1 and are located on the periphery of the processing energy beam transmission channel 11.

[0040] The powder-feeding laser beam control unit 12 converges the powder-feeding laser beam through a condenser device such as a convex lens, and reflects the converged powder-feeding laser beam to the processing platform 2 or the loading tray 3 through a reflector. By combining the motor drive to adjust the angle of the reflector, the waist position of the powder-feeding laser beam is controlled to move between the processing platform 2 and the loading tray 3 of the additive manufacturing equipment.

[0041] Furthermore, the powder-feeding laser beam mainly has two functions. One is to preheat the metal powder, and the other is to transport the metal powder from the position of the loading tray 3 to the processing platform 2. During the feeding process, due to the energy of the laser itself, the metal powder is preheated, that is, it has both the function of feeding and the function of preheating the metal powder. Therefore, the energy density per unit area of the powder-feeding laser beam should be less than the energy density per unit area of the molten raw material, and it can produce an optical tweezer effect. In one example, the energy density per unit area of the powder-feeding laser beam is 5×10 4 W / cm 2 to 5×10 5 W / cm 2 .

[0042] The embodiment of the present invention utilizes the optical tweezer effect to realize the transportation of metal powder. The optical tweezer effect is to use the gradient force and scattering force of the laser beam to act on the particles together, so as to realize the capture and manipulation of the particles. Specifically, the intensity distribution of the laser beam is uneven, resulting in the particles being affected by the gradient force in the beam and moving in the direction of the maximum beam intensity (i.e., the waist position). When the particles move in the beam, a scattering force will be generated due to the change in momentum, and this force will also pull the particles towards the waist. Combining the actions of the gradient force and the scattering force, the particles will eventually be stably located near the waist position.

[0043] When the waist position of the powder-feeding laser beam moves from the loading tray 3 to the processing platform 2, raw materials such as copper powder can follow the powder-feeding laser beam to move to the processing platform 2 to achieve powder feeding. At the same time, the laser energy of the powder-feeding laser beam itself can also heat the metal powder, realizing the preheating of the raw materials while powder feeding, and improving the overall working efficiency of the additive manufacturing equipment.

[0044] A powder delivery mechanism according to an embodiment of the present invention is provided with a processing energy beam transmission channel 11 and a plurality of powder delivery laser beam control units 12 on a powder delivery laser disk 1. The powder delivery laser beam control units 12 are used to converge the powder delivery laser beams, and control the movement of the beam waist position of the powder delivery laser beams between a processing platform 2 and a loading tray 3 of an additive manufacturing device. The powder delivery laser beams can transfer the raw materials for additive manufacturing from the loading tray 3 to the processing platform 2 based on the optical tweezer effect, and preheat the raw materials, which is convenient for the processing energy beam to quickly process the raw materials on the processing platform 2 of the additive manufacturing device. Through a new powder delivery method, the raw materials for additive manufacturing are preheated during the powder delivery process, solving the technical problems of large volume and complex structure of the preheating and powder spreading mechanisms in the existing additive manufacturing technologies, improving the processing efficiency, and realizing high-quality additive manufacturing.

[0045] In some embodiments, the powder delivery laser disk 1 is of a ring structure, the processing energy beam transmission channel 11 is arranged in the middle of the powder delivery laser disk 1, and the powder delivery laser beam control units 12 are arranged at intervals along the circumference on the periphery of the processing energy beam transmission channel 11.

[0046] A plurality of powder delivery laser beam control units 12 are arranged around the processing energy beam transmission channel 11. Each powder delivery laser beam control unit 12 can control the corresponding powder delivery laser beam to deliver a batch of raw materials to the processing platform 2 for processing. The powder delivery laser beam control units 12 are evenly distributed along the circumference, which can realize the powder delivery in all directions around the processing platform 2, ensuring the uniformity of powder distribution and the stability of the processing process.

[0047] This structure uniformly arranges and highly integrates most of the powder delivery lasers, which can greatly improve the powder delivery rate of the powder delivery mechanism, thereby improving the additive manufacturing rate.

[0048] Further, as Figure 3 shown, the powder delivery laser beam control unit 12 includes a focusing unit 121 and a motion control unit 122. The focusing unit 121 is used to converge the powder delivery laser beam, and the motion control unit 122 is used to control the movement path of the powder delivery laser beam according to a control instruction.

[0049] The main function of the focusing unit 121 is to converge the powder delivery laser beam, concentrate the energy of the beam, so as to be able to act more effectively on the powder material and realize the precise transportation of the powder.

[0050] Specifically, the focusing unit 121 can use optical devices such as a convex lens, a combination of multiple lenses, a parabolic mirror or a spherical mirror to realize the focusing of the beam.

[0051] The motion control unit 122 is responsible for controlling the movement path of the powder delivery laser beam according to external control instructions, ensuring that the beam can move between the processing area and the loading area along a preset trajectory to achieve precise powder transportation. In one example, the motion control unit 122 can use a piezoelectric-driven mirror, which is a device that uses the piezoelectric effect to control the tilt angle of the mirror. When a voltage is applied, the piezoelectric material deforms, driving the mirror to tilt. The piezoelectric-driven mirror has a fast response speed and high control precision. It can achieve precise adjustment of small angles and is suitable for occasions with extremely high requirements for the beam direction.

[0052] In some embodiments, a driving mechanism and a reflecting unit are provided on the motion control unit 122. The output end of the driving mechanism is connected to the reflecting unit to adjust the tilt angle of the reflecting unit.

[0053] The reflecting unit is usually a mirror assembly capable of reflecting the beam. When its tilt angle changes, the propagation direction of the powder delivery laser beam also changes accordingly, thus realizing the dynamic adjustment of the movement path of the powder delivery laser beam.

[0054] The driving mechanism is a high-precision rotary motor. The rotary motor rotates according to the background instruction to adjust the tilt angle of the reflecting unit, causing the powder delivery laser beam to deflect, and then causing the powder delivery laser beam to move from the position of the loading tray 3 to the position of the processing platform 2. Due to the optical tweezer effect acting on the metal powder, the capture and manipulation of the metal powder can be realized, that is, when the powder delivery laser beam moves from the position of the loading tray 3 to the position of the processing platform 2, the irradiated metal powder will also follow and move from the position of the loading tray 3 to the position of the processing platform 2, thereby realizing the transportation of the metal powder.

[0055] The sequence and specific positions of the focusing unit 121 and the motion control unit 122 in the optical path can be set according to the actual situation. In one example, the focusing unit 121 is arranged on the left side of the motion control unit 122. After the focusing unit 121 focuses the powder delivery laser beam on the left side, the transmission direction of the powder delivery laser beam is changed through the motion control unit 122, thereby controlling the movement path of the powder delivery laser beam.

[0056] The powder delivery laser beam control unit 12 in the embodiment of the present invention makes the control of the powder delivery laser beam more flexible and precise, can quickly respond to control instructions during the processing process, and can adjust the position and direction of the powder delivery laser beam in real time according to actual processing requirements, which can effectively improve the processing adaptability and manufacturing ability of the additive manufacturing equipment and meet the requirements of different processing tasks.

[0057] In some embodiments, the powder delivery mechanism further includes a first light source, which is arranged on the powder delivery laser disk 1, and the first light source is used to output the powder delivery laser beam to the powder delivery laser beam control unit 12.

[0058] Specifically, the first light source is a light source additionally provided on the powder feeding laser disc 1. The number of the first light sources is the same as the number of the powder feeding laser beam control units 12, and each powder feeding laser beam control unit 12 is correspondingly connected to one first light source; alternatively, the number of the first light sources is less than the number of the powder feeding laser beam control units 12, and the light beam output by the first light source is split, so that each powder feeding laser beam control unit 12 can receive the corresponding powder feeding laser beam.

[0059] Further, the energy density per unit area of the powder feeding laser beam ranges from 5×10 4 W / cm 2 to 5×10 5 W / cm 2 For example, the energy density per unit area of the powder feeding laser beam is 6×10 5 W / cm 2 or 1×10 5 W / cm 2 etc. The powder feeding laser beam within this range can simultaneously preheat and transport raw materials such as copper powder.

[0060] In this embodiment, an additional first light source is introduced to provide the powder feeding laser beam for the powder feeding laser beam control unit 12, ensuring the stability and reliability of the powder feeding laser beam. A stable light source supply helps to ensure the continuity and consistency of the powder delivery process, reduce problems such as uneven powder distribution caused by unstable light beams, and thus improve the stability of the additive manufacturing process and the quality of the manufactured parts.

[0061] In some embodiments, the powder feeding mechanism further includes a laser beam splitter, which is used to split the processing energy beam into several powder feeding laser beams and transmit the powder feeding laser beams to the powder feeding laser beam control unit 12.

[0062] Specifically, the powder feeding type additive manufacturing equipment outputs a processing energy beam through a processing energy beam output unit. The processing energy beam output unit uses a second laser to output a laser beam as the processing energy beam, and the laser beam splitter is arranged between the powder feeding laser disc 1 and the second laser.

[0063] The energy density per unit area of the processing energy beam is generally greater than 1×10 6 W / cm 2 so as to be able to melt raw materials such as copper powder.

[0064] The laser beam splitter can split the laser beam output by the second laser into multiple powder feeding laser beams with specific directions and intensity distributions and output them to each powder feeding laser beam control unit 12 of the powder feeding laser disc 1.

[0065] Exemplarily, the laser beam splitter adopts a prism-type beam splitter, and utilizes the refraction and dispersion characteristics of the prism to achieve beam splitting. The prism can be an equilateral prism, a right prism, a triangular prism, etc. When the laser beam passes through the prism, since light with different wavelengths has different refractive indices, the light beam will undergo refraction and dispersion inside the prism, thus splitting into multiple light beams in different directions. Alternatively, the laser beam splitter adopts a diffractive optical element beam splitter, and utilizes a diffractive optical element (such as a diffraction grating) to achieve beam splitting. The diffractive optical element is based on the principle of light diffraction, and controls the propagation direction and intensity distribution of the light beam by etching specific microstructures on its surface.

[0066] Through the beam splitting function of the laser beam splitter, powder can be delivered to more processing points per unit time, improving the production efficiency of the entire additive manufacturing equipment. Moreover, by directly splitting the processing energy beam without the need to additionally introduce other light sources, the volume and cost of the powder delivery mechanism can be reduced.

[0067] In some embodiments, as shown in Figure 4 and Figure 5 , the loading tray 3 surrounds the outer periphery of the processing platform 2, and a circumferentially surrounding boss is provided on the outer periphery of the loading tray 3.

[0068] Specifically, the processing platform 2 is the processing location for additive manufacturing. The loading tray 3 surrounds the processing platform 2 on all sides. The main function of the loading tray 3 is to carry the raw materials for processing, specifically metal powders such as copper powder.

[0069] When transporting the raw materials through the powder delivery laser beam, the raw materials will undergo displacement. In the embodiment of the present invention, by providing a circumferentially surrounding boss on the outer periphery of the loading tray 3, it is possible to prevent the raw materials from overflowing outside the loading tray 3.

[0070] The embodiment of the present invention also provides a powder delivery type additive manufacturing equipment, as shown in Figure 6 , which includes a processing energy beam output unit and a powder delivery mechanism as described in any one of the above embodiments of the present invention. The processing energy beam output unit is used to output a processing energy beam.

[0071] The processing energy beam output unit includes: an energy source 4 for outputting a processing energy beam; a shaping component 5 for shaping the processing energy beam; a focusing adjustment component, including a galvanometer 6 and a field lens 7. The galvanometer 6 is used to adjust the focusing coordinates of the processing energy beam, and the field lens 7 is used to converge the processing energy beam.

[0072] Specifically, the energy source 4 used for processing adopts a second laser, and the laser beam emitted by the second laser itself is shaped by the shaping component 5. The shaping component 5 includes a DOE lens, beam expansion, etc. for the laser beam. The shaped energy is output to the focusing adjustment component.

[0073] The focusing adjustment component includes a galvanometer scanner 6 and a field lens 7. The galvanometer scanner 6 is combined with a precision motor itself, so as to control the parameters of the output laser beam. For the laser, it can control the focusing coordinates of the laser beam, and can control the focal plane position by driving the field lens 7. The field lens 7 can converge the laser beam for the laser beam, thereby increasing the energy density during laser processing or additive manufacturing.

[0074] The powder feeding laser disc 1 constructs multiple powder feeding laser beams simultaneously through a plurality of powder feeding laser beam control units 12. The constructed powder feeding laser beams, even after convergence, do not reach the damage threshold of the raw material, and are used for raw material powder transportation and material preheating. When feeding powder, the optical tweezer technology is adopted to pick up the raw material powder from the feeding tray 3 and control the movement of the raw material powder to the additive manufacturing area through the internal motor, that is, move the raw material powder from position A of the feeding tray 3 to position B of the processing platform 2, completing one feeding.

[0075] The feeding tray 3 carries the raw material powder used in additive manufacturing. The position B of the processing platform 2 is the energy convergence area, and generally the energy density here is the highest.

[0076] The powder feeding type additive manufacturing equipment of the embodiment of the present invention is provided with a processing energy beam transmission channel 11 and a plurality of powder feeding laser beam control units 12 on the powder feeding laser disc 1. The powder feeding laser beam control units 12 are used to converge the powder feeding laser beams and control the waist position of the powder feeding laser beams to move between the processing platform 2 and the feeding tray 3 of the additive manufacturing equipment. The powder feeding laser beams can transfer the raw materials for additive manufacturing from the feeding tray 3 to the processing platform 2 based on the optical tweezer effect and preheat the raw materials, facilitating the processing energy beam to quickly process the raw materials on the processing platform 2 of the additive manufacturing equipment. Through a new powder feeding method, the raw materials for additive manufacturing are preheated during the powder feeding process, solving the technical problems of large volume and complex structure of the preheating and powder spreading mechanisms in the existing additive manufacturing technology, improving the processing efficiency, and realizing high-quality additive manufacturing.

[0077] Although the exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions, and modifications to these embodiments without departing from the spirit and the defined protection scope of the present invention, and such modifications and variations all fall within the defined scope.

Claims

1. A powder delivery mechanism is applied to a powder delivery type additive manufacturing device, and is characterized in that, Comprising: A powder delivery laser disc, on which a processing energy beam transmission channel and a number of powder delivery laser beam control units are provided; The processing energy beam transmission channel is used to transmit the processing energy beam to the processing platform of the additive manufacturing equipment; The powder delivery laser beam control unit is used to converge the powder delivery laser beam and control the movement of the beam waist position of the powder delivery laser beam between the processing platform and the loading tray of the additive manufacturing equipment. The powder delivery laser beam is used to transfer the raw material for additive manufacturing from the loading tray to the processing platform based on the optical tweezer effect and preheat the raw material.

2. The powder feeding mechanism according to claim 1, wherein The powder delivery laser beam control unit includes a focusing unit and a motion control unit. The focusing unit is used to converge the powder delivery laser beam, and the motion control unit is used to control the movement path of the powder delivery laser beam according to the control instruction.

3. The powder feeding mechanism according to claim 2, wherein, A driving mechanism and a reflection unit are provided on the motion control unit. The output end of the driving mechanism is connected to the reflection unit to adjust the tilt angle of the reflection unit.

4. The powder feeding mechanism according to claim 1, characterized in that, It further includes a first light source, which is arranged on the powder delivery laser disc and is used to output the powder delivery laser beam to the powder delivery laser beam control unit.

5. The powder delivery mechanism according to claim 1, wherein, It further includes a laser beam splitter, which is used to divide the processing energy beam into a number of the powder delivery laser beams and transmit the powder delivery laser beams to the powder delivery laser beam control unit.

6. The powder feeding mechanism according to claim 1, characterized in that, The loading tray surrounds the outer periphery of the processing platform, and a circumferentially surrounding boss is provided on the outer periphery of the loading tray.

7. The powder feeding mechanism according to claim 1, characterized in that, The powder delivery laser disc is of an annular structure. The processing energy beam transmission channel is arranged in the middle of the powder delivery laser disc, and the powder delivery laser beam control units are arranged at intervals along the circumference on the periphery of the processing energy beam transmission channel.

8. The powder feeding mechanism according to claim 1, characterized in that, The energy density per unit area of the powder-feeding laser beam is 5×10 4 W / cm 2 to 5×10 5 W / cm 2 .

9. A powder feeding type additive manufacturing device, characterized in that, It includes a processing energy beam output unit and the powder delivery mechanism according to any one of claims 1 to 8. The processing energy beam output unit is used to output the processing energy beam.

10. The powder feeding type additive manufacturing equipment according to claim 9, characterized in that, The processing energy beam output unit includes: An energy source, which is used to output the processing energy beam; A shaping component, which is used to shape the processing energy beam; A focusing adjustment component, including a galvanometer scanner and a field lens. The galvanometer scanner is used to adjust the focusing coordinates of the processing energy beam, and the field lens is used to converge the processing energy beam.

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