A powder processing device for metal additive manufacturing

Abstract

The invention relates to the technical field of workpiece processing, and discloses a powder processing device for metal additive manufacturing, comprising a processing device main body and a demoulding component arranged inside the processing device main body, the demoulding component comprising an annular carrier plate, a first gear shaft and a circular shaft, the first gear shaft is symmetrically rotatably connected to the inside of the annular carrier plate, and the lower surface of the annular carrier plate is symmetrically rotatably connected to a cross plate; the threaded groove on the first sleeve and the threaded ring inside the tooth plate are threadedly connected, so that the tooth plate can slide inside the molding groove, and the size of the molded workpiece can be adjusted by rotating the first sleeve, avoiding the problem of different molds needing to be replaced for workpieces of different thicknesses, improving processing efficiency and reducing processing costs, and rebounding through the first spring after the mold clamping machine stops pressing, so that the tooth plate can promptly drive the molded workpiece to pop up, avoiding the problem of the workpiece adhering to the inner wall of the molding groove, and ensuring that the outer surface of the molded workpiece is smooth and flat.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece processing, and in particular to a powder processing device for metal additive manufacturing. Background Art

[0002] Metal additive manufacturing is a method of direct forming of metal parts and is the latest development of rapid prototyping technology. Metal additive manufacturing requires the use of metal powder, which is initially die-casted and then finally formed by high-temperature melting. Compared with traditional subtractive processing and manufacturing methods, it has a higher utilization rate of metal raw materials and has unique advantages in the preparation of complex metal parts. In addition, it can realize the rapid repair of molds and damaged parts, which plays a two-pronged role in shortening the design cycle of metal parts and reducing production costs.

[0003] In the existing metal additive manufacturing process, different workpieces need to be produced using their specific templates. When facing the production of workpieces of different sizes, workers need to constantly replace and install the templates, which reduces the efficiency of manufacturing work;

[0004] After the workpiece is compacted and formed, its interior is not breathable due to its high density after compaction. The outer wall of the workpiece and the molding equipment are tightly adsorbed, and the molded workpiece has not been melted at high temperature and has low strength. At this time, when the pushing device pushes it, the part where the molded workpiece and the equipment are adhered will be destroyed, causing the workpiece to be damaged and unusable.

[0005] To this end, a powder processing device for metal additive manufacturing is proposed. Summary of the invention

[0006] The object of the present invention is to provide a powder processing device for metal additive manufacturing to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder processing device for metal additive manufacturing, comprising a processing device body and a demolding assembly arranged inside the processing device body, the demolding assembly comprising an annular carrier plate, a first gear shaft and a circular shaft, the first gear shaft is symmetrically rotatably connected to the inside of the annular carrier plate, the lower surface of the annular carrier plate is symmetrically rotatably connected to a cross plate, the first gear shaft and the second gear shaft are both transmission-connected by a transmission belt, the circular shaft is symmetrically penetrated and slidably connected to the bottom of the annular carrier plate, the lower surface of the circular shaft is fixedly connected to a cross plate, the cross plate and the lower surface of the annular carrier plate are fixedly connected to a second spring, and the second springs are both sleeved on the outer wall of the circular shaft.

[0008] Preferably, an adjusting component is provided inside the processing device body, and the adjusting component includes a driving shaft, a first sleeve and a toothed plate, the driving shaft is driven and installed at the bottom of the inner cavity of the processing device body, the outer wall of the driving shaft is symmetrically fixedly connected to the limiting block, the first sleeve is slidably connected to the outer wall of the driving shaft, the inner wall of the first sleeve is provided with a sliding groove adapted to the limiting block, a first spring is fixedly connected between the top of the driving shaft and the top of the inner cavity of the first sleeve, a threaded groove is provided on the outer wall of the first sleeve, the toothed plate is slidably connected to the outer wall of the first sleeve, the inner ring of the toothed plate is fixedly connected to a threaded ring, the threaded ring and the threaded groove are threadedly connected, the toothed plate is slidably connected to the inside of the processing device body, the outer wall of the first sleeve and below the threaded groove are symmetrically provided with toothed grooves, the first gear shaft is meshed with the toothed grooves, and the annular carrier plate is rotatably connected to the lower surface of the toothed plate.

[0009] Preferably, the upper surface of the processing device body is slidably connected to a material injection device, and a scraping assembly is arranged inside the material injection device, and the scraping assembly includes a rack, a brush roller shaft and a first gear, the rack is symmetrically fixedly connected to the upper surface of the processing device body, the brush roller shaft is rotatably connected to the inside of the material injection device, the outer wall of the brush roller shaft is symmetrically rotatably connected to a slider, and the sliders are both vertically slidably connected to the inside of the material injection device, both ends of the brush roller shaft are fixedly connected to the first gear, the first gear is meshed with the rack, the upper surface of the slider is fixedly connected to a third spring, the end of the third spring away from the slider is fixedly connected to the inner wall of the material injection device, the upper surface of the slider is fixedly connected to a connecting rod, and a screw rod is driven to be installed inside the material injection device, and the middle part of the connecting rod is threadedly connected to the outer wall of the screw rod.

[0010] Preferably, a collecting component is provided inside the injection device, and the collecting component includes a fan shaft and a collecting box, the fan shaft is driven and installed inside the injection device, an air outlet is provided on the top of the injection device, the collecting box is slidably connected to the inside of the injection device, a second sleeve is fixedly connected to the inner cavity of the injection device, the second sleeve is sleeved on the outer wall of the fan shaft, a conical air duct is provided inside the injection device and below the second sleeve, a cavity is provided inside the injection device and below the conical air duct, the collecting box slides inside the cavity of the injection device, an air inlet is provided inside the injection device, and the air inlet is connected between the cavity of the injection device and the brush roller shaft.

[0011] Preferably, a clamping machine is arranged above the main body of the processing device, a pressing die is arranged at the bottom of the clamping machine, a molding groove is opened on the upper surface of the main body of the processing device, the pressing die is adapted to the molding groove, the tooth plate slides inside the molding groove in the middle part of the injection device, and the tooth plate is adapted to the molding groove.

[0012] Preferably, the limiting block and the sliding groove on the inner wall of the first sleeve limit the first sleeve, and the first sleeve can only slide vertically on the outer wall of the driving shaft and cannot rotate.

[0013] Preferably, the first gear shaft is meshed and engaged with the tooth groove, the tooth groove limits the first gear shaft, and the outer wall of the second gear shaft is in contact with the transverse plate.

[0014] Preferably, a controller is provided inside the injection device, a pusher is provided inside the main body of the processing device, and the controller is electrically connected to the screw rod and the pusher.

[0015] Preferably, when the fan shaft rotates, the airflow is blown vertically upward, and the plane formed by the air inlet is tangent to the section of the outer wall of the brush roller shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the driving shaft rotates, the threaded groove on the first sleeve and the threaded ring inside the tooth plate are threadedly connected, so that the tooth plate can slide inside the molding groove, and the size of the molded workpiece can be adjusted by rotating the first sleeve, avoiding the problem of replacing different molds for workpieces of different thicknesses, improving processing efficiency and reducing processing costs. The first spring rebounds after the mold clamping machine stops pressing, so that the tooth plate can drive the molded workpiece to pop up in time, avoiding the problem of the workpiece adhering to the inner wall of the molding groove, and ensuring that the outer surface of the molded workpiece is smooth and flat.

[0018] 2. By knocking the bottom of the tooth plate with the circular shaft, the metal additives attached to the upper surface of the tooth plate can be loosened and air can enter, so that the formed workpiece can be separated from the tooth plate, avoiding the problem of damage to the workpiece due to the adhesion of the formed metal material to the upper surface of the tooth plate during demolding.

[0019] 3. Through the cooperation of the scraping component and the collecting component, the metal additives adhering to the surface of the processing device body will first be scraped by the brush roller to reduce the adhesion force, and then the negative pressure adsorption of the cavity of the injection device will make the residual metal additives be sucked into the collection box through the air inlet, avoiding the problem that the metal additives are difficult to clean after adhering to the processing device body due to their small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 This is an exploded schematic diagram of the regulating assembly structure of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the demoulding component structure of the present invention;

[0024] Figure 5 It is a schematic cross-sectional view of the structure of the injection device of the present invention;

[0025] Figure 6 It is a partial schematic diagram of the structure of the scraping and sweeping assembly of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the injection device of the present invention;

[0027] Figure 8 It is a schematic cross-sectional view of the collecting component structure of the present invention.

[0028] In the figure:

[0029] 1. Processing device body; 2. Mold clamping machine; 3. Injection device; 4. Forming tank;

[0030] 11. Adjustment assembly; 111. Drive shaft; 112. First spring; 113. Limit block; 114. First sleeve; 115. Thread groove; 116. Tooth plate; 117. Thread ring;

[0031] 12. demoulding assembly; 121. annular carrier plate; 122. first gear shaft; 123. tooth groove; 124. second gear shaft; 125. transmission belt; 126. second spring; 127. transverse plate; 128. round shaft;

[0032] 31. Sweeping assembly; 311. Rack; 312. Sliding block; 313. Third spring; 314. Brush roller shaft; 315. First gear; 316. Connecting rod; 317. Screw rod;

[0033] 32. Collection component; 321. Fan shaft; 322. Second sleeve; 323. Conical air duct; 324. Collection box; 325. Air outlet; 326. Air inlet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiments of the present invention

[0036] See also Figures 1 to 4The processing device body 1 is provided with an adjustment component 11 inside, and the adjustment component 11 includes a driving shaft 111, a first sleeve 114 and a tooth plate 116. The driving shaft 111 is driven and installed at the bottom of the inner cavity of the processing device body 1. The outer wall of the driving shaft 111 is symmetrically fixedly connected to the limit block 113. The first sleeve 114 is slidably connected to the outer wall of the driving shaft 111. The inner wall of the first sleeve 114 is provided with a sliding groove adapted to the limit block 113. A first spring 112 is fixedly connected between the top of the driving shaft 111 and the top of the inner cavity of the first sleeve 114. A threaded groove 115 is provided on the outer wall of the first sleeve 114. The tooth plate 116 is slidably connected to the outer wall of the first sleeve 114. The inner ring of the tooth plate 116 is fixedly connected with a threaded ring 117. The threaded ring 117 and the threaded groove 115 is threadedly connected, and the tooth plate 116 is slidably connected to the inside of the processing device body 1. The outer wall of the first sleeve 114 and the lower part of the thread groove 115 are symmetrically provided with tooth grooves 123, and the first gear shaft 122 is meshed with the tooth grooves 123. The annular carrier plate 121 is rotatably connected to the lower surface of the tooth plate 116. A clamping machine 2 is arranged above the processing device body 1, and a pressing die is arranged at the bottom of the clamping machine 2. A molding groove 4 is arranged on the upper surface of the processing device body 1, and the pressing die is adapted to the molding groove 4. The tooth plate 116 slides inside the molding groove 4 in the middle of the injection device 3, and the tooth plate 116 is adapted to the molding groove 4. The limit block 113 and the slide groove on the inner wall of the first sleeve 114 limit the first sleeve 114, and the first sleeve 114 can only slide vertically on the outer wall of the driving shaft 111 and cannot rotate.

[0037] When the embodiment of the present invention is actually used:

[0038] The injection device 3 slides above the processing device body 1 and puts the metal additive into the inside of the molding groove 4, and then the injection device 3 slides away from the bottom of the mold clamping machine 2. At this time, the metal additive is accumulated in the inside of the molding groove 4 and is located above the tooth plate 116. Then the staff controls the rotation of the drive shaft 111 according to the required thickness of the molded workpiece. When the drive shaft 111 rotates, the first sleeve 114 is driven to rotate together through the limit block 113 and the slide groove on the inner wall of the first sleeve 114. During the rotation process, the thread groove 115 of the first sleeve 114 is threadedly connected with the thread ring 117. At this time, because the tooth plate 116 limits the vertical sliding connection The first sleeve 114 is connected to the inside of the processing device body 1, so the first sleeve 114 will move vertically on the outer wall of the first sleeve 114 through the threaded engagement of the thread groove 115 and the threaded ring 117 during the rotation process. Then the staff controls the mold clamping machine 2 to move downward. When the die at the bottom of the mold clamping machine 2 contacts the metal additive, the die continues to move downward, and the tooth plate 116 is pushed downward by the die of the upper mold clamping machine 2 through the extrusion of the metal additive. When the tooth plate 116 moves downward, the first spring 112 between the drive shaft 111 and the first sleeve 114 is squeezed and elastically contracts. When the inner wall of the first sleeve 114 After the top of the slide groove contacts the limit block 113, the first sleeve 114 cannot continue to slide downward on the outer wall of the driving shaft 111. At this time, the mold clamping machine 2 continues to apply downward pressure, and the metal additive material located inside the molding groove 4 is fixed and formed under the extrusion of the mold clamping machine 2 and the tooth plate 116. After the pressing is completed, the mold clamping machine 2 slides upward out of the molding groove 4. At this time, the first spring 112 is no longer squeezed and elastically stretches. The first spring 112 stretches and pushes the first sleeve 114 to move upward. The upward movement of the first sleeve 114 drives the tooth plate 116 to move upward together, so that the formed metal material is pushed out of the molding groove 4. When the shaft 111 rotates, the threaded groove 115 on the first sleeve 114 and the threaded ring 117 inside the tooth plate 116 are threadedly connected, so that the tooth plate 116 can slide inside the molding groove 4, and the size of the molded workpiece can be adjusted by rotating the first sleeve 114, avoiding the problem of replacing different molds for workpieces of different thicknesses, improving processing efficiency and reducing processing costs. The first spring 112 rebounds after the mold clamping machine 2 stops pressing, so that the tooth plate 116 can promptly drive the molded workpiece to pop up, avoiding the problem of the workpiece adhering to the inner wall of the molding groove 4, and ensuring that the outer surface of the molded workpiece is smooth and flat.

[0039] See also Figures 1 to 4A powder processing device for metal additive manufacturing comprises a processing device body 1 and a demoulding assembly 12 arranged inside the processing device body 1, the demoulding assembly 12 comprises an annular carrier plate 121, a first gear shaft 122 and a circular shaft 128, the first gear shaft 122 is symmetrically rotatably connected to the inside of the annular carrier plate 121, the lower surface of the annular carrier plate 121 is symmetrically rotatably connected to a transverse plate 127, a transmission belt 125 is transmission-connected between the first gear shaft 122 and the second gear shaft 124, the circular shaft 128 is symmetrically penetrated and slidably connected to the bottom of the annular carrier plate 121, the lower surface of the circular shaft 128 is fixedly connected to the transverse plate 127, a second spring 126 is fixedly connected between the transverse plate 127 and the lower surface of the annular carrier plate 121, the second spring 126 is sleeved on the outer wall of the circular shaft 128, the first gear shaft 122 is meshed and clamped with a tooth groove 123, the tooth groove 123 limits the first gear shaft 122, and the outer wall of the second gear shaft 124 is in contact with the transverse plate 127.

[0040] When the embodiment of the present invention is actually used:

[0041] After the metal additive is pressed and formed, the first spring 112 elastically stretches and pushes the first sleeve 114 to slide upward on the outer wall of the driving shaft 111. Then, the staff controls the driving shaft 111 to rotate and make the tooth plate 116 slide upward on the outer wall of the first sleeve 114. During the upward movement of the tooth plate 116, the first gear shaft 122 below it is driven to mesh with the tooth groove 123 and rotate. The first gear shaft 122 rotates and drives the second gear shaft 124 to rotate together through the transmission belt 125. During the rotation process, the second gear shaft 124 repeatedly pushes the cross plate 127 downward, so that the second spring 126 repeatedly stretches elastically and actively contracts. During the contraction process, the second spring 126 drives the round shaft 128 to knock the bottom of the tooth plate 116.

[0042] Because the rotation of the drive shaft 111 will drive the first sleeve 114 to rotate together, the annular carrier plate 121 is affected by the clamping of the first gear shaft 122 and the tooth groove 123, and the annular carrier plate 121 will rotate synchronously with the first sleeve 114 at the bottom of the tooth plate 116, so that the circular shaft 128 can make a circular motion at the bottom of the tooth plate 116, so that the circular shaft 128 can evenly knock the bottom of the tooth plate 116. Through the knocking of the bottom of the tooth plate 116 by the circular shaft 128, the metal additive attached to the upper surface of the tooth plate 116 can be loosened and air can enter, so that the formed workpiece can be separated from the tooth plate 116, avoiding the problem of damage to the workpiece due to the adhesion of the formed metal material to the upper surface of the tooth plate 116 due to the bottom during demolding.

[0043] See also Figure 5 and Figure 6The upper surface of the processing device body 1 is slidably connected with the injection device 3, and the injection device 3 is provided with a scraping assembly 31 inside. The scraping assembly 31 includes a rack 311, a brush roller shaft 314 and a first gear 315. The rack 311 is symmetrically fixedly connected to the upper surface of the processing device body 1, and the brush roller shaft 314 is rotatably connected to the inside of the injection device 3. The outer wall of the brush roller shaft 314 is symmetrically rotatably connected with a slider 312. The sliders 312 are vertically slidably connected to the inside of the injection device 3. Both ends of the brush roller shaft 314 are fixedly connected to the first gear 315. The first gear 315 is meshed with the rack 311, and the upper surface of the slider 312 is fixedly connected with the third spring 313, and the end of the third spring 313 away from the slider 312 is fixedly connected to the inner wall of the injection device 3, and the upper surface of the slider 312 is fixedly connected with a connecting rod 316, and the interior of the injection device 3 is driven to install a screw rod 317, and the middle part of the connecting rod 316 is threadedly connected to the outer wall of the screw rod 317, a controller is arranged inside the injection device 3, and a pusher is arranged inside the processing device body 1, and the controller is electrically connected to the screw rod 317 and the pusher.

[0044] When the embodiment of the present invention is actually used:

[0045] When the injection device 3 moves toward the mold clamping machine 2 to prepare for injecting metal additives, the controller inside the injection device 3 will control the screw 317 to rotate, so that the connecting rod 316 moves downward and drives the brush roller 314 to move downward through the slider 312. The third spring 313 is no longer squeezed and elastically stretches, so that the brush roller 314 fits the upper surface of the processing device body 1. The movement of the injection device 3 will drive the brush roller 314 inside it to move together. During the movement of the brush roller 314, the first gear 315 meshes and rotates with the rack 311. The brush roller 314 rotates and scrapes the residual metal additives on the processing device body 1, so that the metal additives attached to the processing device body 1 are separated from the processing device body 1 under the scraping of the brush roller 314.

[0046] See also Figure 7 and Figure 8A collecting assembly 32 is provided inside the injection device 3, and the collecting assembly 32 includes a fan shaft 321 and a collecting box 324. The fan shaft 321 is driven and installed inside the injection device 3. An air outlet 325 is provided on the top of the injection device 3. The collecting box 324 is slidably connected to the inside of the injection device 3. A second sleeve 322 is fixedly connected to the inner cavity of the injection device 3. The second sleeve 322 is sleeved on the outer wall of the fan shaft 321. A conical air duct 323 is provided inside the injection device 3 and below the second sleeve 322. A cavity is provided inside the injection device 3 and below the conical air duct 323. The collecting box 324 slides inside the cavity of the injection device 3. An air inlet 326 is provided inside the injection device 3. The air inlet 326 is connected between the cavity of the injection device 3 and the brush roller shaft 314. When the fan shaft 321 rotates, the air flow is blown vertically upward, and the plane formed by the air inlet 326 is tangent to the cross section of the outer wall of the brush roller shaft 314.

[0047] When the embodiment of the present invention is actually used:

[0048] When the device is in use, the fan shaft 321 is powered on and rotates. When the fan shaft 321 rotates, the airflow is blown in a vertically upward direction. Therefore, during the rotation process, the fan shaft 321 blows the air inside the cavity of the injection device 3 upward through the conical air duct 323 and discharges it to the outside of the device through the air outlet 325, so that the cavity of the injection device 3 is in a negative pressure state. When the cavity of the injection device 3 is in a negative pressure state, air is inflated into the interior through the air inlet 326. At this time, because the inclined surface of the air inlet 326 is tangent to the cross section of the brush roller shaft 314, during the rotation of the brush roller shaft 314, the metal additives adhered to its surface will be sucked into the injection device by the air inlet 326. Inside the cavity of the device 3, the metal additives are collected and eventually fall into the collection box 324. The staff can regularly slide the collection box 324 out of the molding tank 4 to recycle the collected metal additives. Through the cooperation of the scraping component 31 and the collecting component 32, the metal additives adhering to the surface of the processing device body 1 will first be scraped by the brush roller 314 to reduce the adhesion force, and then through the negative pressure adsorption of the cavity of the injection device 3, the remaining metal additives are sucked into the collection box 324 through the air inlet 326, thereby avoiding the problem that the metal additives are difficult to clean after adhering to the processing device body 1 due to their small size.

[0049] 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. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0050] 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 processing device for metal additive manufacturing, comprising a processing device body (1) and a demoulding component (12) arranged inside the processing device body (1), characterized in that: The demoulding assembly (12) comprises an annular carrier plate (121), a first gear shaft (122) and a circular shaft (128); the first gear shaft (122) is symmetrically rotatably connected to the inside of the annular carrier plate (121); the lower surface of the annular carrier plate (121) is symmetrically rotatably connected to the second gear shaft (124); a transmission belt (125) is transmission-connected between the first gear shaft (122) and the second gear shaft (124); the circular shaft (128) is symmetrically penetrated and slidably connected to the bottom of the annular carrier plate (121); a transverse plate (127) is fixedly connected to the lower surface of the circular shaft (128); a second spring (126) is fixedly connected between the transverse plate (127) and the lower surface of the annular carrier plate (121); and the second spring (126) is sleeved on the outer wall of the circular shaft (128); An adjusting component (11) is arranged inside the processing device body (1), and the adjusting component (11) comprises a driving shaft (111), a first sleeve (114) and a tooth plate (116); the driving shaft (111) is driven and installed at the bottom of the inner cavity of the processing device body (1); the outer wall of the driving shaft (111) is symmetrically fixedly connected to the limit block (113); the first sleeve (114) is slidably connected to the outer wall of the driving shaft (111); the inner wall of the first sleeve (114) is provided with a sliding groove adapted to the limit block (113); a first spring is fixedly connected between the top of the driving shaft (111) and the top of the inner cavity of the first sleeve (114); (112), a thread groove (115) is formed on the outer wall of the first sleeve (114), the tooth plate (116) is slidably connected to the outer wall of the first sleeve (114), the inner ring of the tooth plate (116) is fixedly connected to a thread ring (117), the thread ring (117) and the thread groove (115) are threadedly connected, the tooth plate (116) is slidably connected to the inside of the processing device body (1), the outer wall of the first sleeve (114) and below the thread groove (115) are symmetrically formed with tooth grooves (123), the first gear shaft (122) is meshed with the tooth grooves (123), and the annular carrier plate (121) is rotatably connected to the lower surface of the tooth plate (116).

2. A powder processing device for metal additive manufacturing according to claim 1, characterized in that: The upper surface of the processing device body (1) is slidably connected to a material injection device (3), and a scraping assembly (31) is arranged inside the material injection device (3). The scraping assembly (31) comprises a rack (311), a brush roller shaft (314) and a first gear (315). The rack (311) is symmetrically fixedly connected to the upper surface of the processing device body (1), and the brush roller shaft (314) is rotatably connected to the inside of the material injection device (3). The outer wall of the brush roller shaft (314) is symmetrically rotatably connected to a slider (312), and the sliders (312) are vertically slidably connected to the inside of the material injection device (3). The brush roller shaft (314) has a first gear (315) fixedly connected to both ends thereof, the first gear (315) meshing with the rack (311), the upper surface of the slider (312) having a third spring (313) fixedly connected thereto, one end of the third spring (313) away from the slider (312) being fixedly connected to the inner wall of the injection device (3), the upper surface of the slider (312) having a connecting rod (316) fixedly connected thereto, a screw rod (317) being drivenly installed inside the injection device (3), the middle portion of the connecting rod (316) being threadedly connected to the outer wall of the screw rod (317).

3. A powder processing device for metal additive manufacturing according to claim 2, characterized in that: A collecting assembly (32) is arranged inside the injection device (3), and the collecting assembly (32) comprises a fan shaft (321) and a collecting box (324). The fan shaft (321) is driven and installed inside the injection device (3). An air outlet (325) is provided at the top of the injection device (3). The collecting box (324) is slidably connected to the inside of the injection device (3). A second sleeve (322) is fixedly connected to the inner cavity of the injection device (3). The second sleeve (322) A conical air duct (323) is provided inside the injection device (3) and below the second sleeve (322), and a cavity is provided inside the injection device (3) and below the conical air duct (323). The collection box (324) slides inside the cavity of the injection device (3). An air inlet (326) is provided inside the injection device (3), and the air inlet (326) is connected between the cavity of the injection device (3) and the brush roller shaft (314).

4. The powder processing device for metal additive manufacturing according to claim 1, characterized in that: A clamping machine (2) is arranged above the processing device body (1), a pressing die is arranged at the bottom of the clamping machine (2), a molding groove (4) is opened on the upper surface of the processing device body (1), the pressing die is matched with the molding groove (4), the tooth plate (116) slides inside the molding groove (4) in the middle of the injection device (3), and the tooth plate (116) is matched with the molding groove (4).

5. The powder processing device for metal additive manufacturing according to claim 1, characterized in that: The limiting block (113) and the sliding groove on the inner wall of the first sleeve (114) limit the first sleeve (114); the first sleeve (114) can only slide vertically on the outer wall of the driving shaft (111) but cannot rotate.

6. The powder processing device for metal additive manufacturing according to claim 1, characterized in that: The first gear shaft (122) is meshed and engaged with the tooth groove (123), the tooth groove (123) limits the position of the first gear shaft (122), and the outer wall of the second gear shaft (124) is in contact with the transverse plate (127).

7. The powder processing device for metal additive manufacturing according to claim 2, characterized in that: The injection device (3) is provided with a controller inside, the processing device body (1) is provided with a pusher inside, and the controller is electrically connected to the screw rod (317) and the pusher.

8. The powder processing device for metal additive manufacturing according to claim 3, characterized in that: When the fan shaft (321) rotates, the airflow is blown in a vertically upward direction, and the plane formed by the air inlet (326) is tangent to the outer wall section of the brush roller shaft (314).

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