Powder cleaning device for metal additive manufacturing

Abstract

The invention discloses a powder cleaning device for metal additive manufacturing, and relates to the technical field of metal additives. The powder cleaning device comprises a main body frame, a mounting table arranged on the main body frame is included, a fixing frame is fixedly mounted on the surface of the mounting table, and a collecting box is mounted in the fixing frame; the scraping mechanism comprises a base plate installed in the fixing frame and further comprises a movable scraping block installed in the fixing frame, and a heating wire is arranged in the movable scraping block. The movable scraping block is driven to transversely move along the surface of the base plate under the action of the pressed mechanism, so that metal dust on the base plate is scraped off, the purpose of fully cleaning and recycling the attached metal dust is achieved, water vapor on the metal dust is evaporated through work of a heating wire in the movable scraping block, and therefore the metal dust is effectively removed. And meanwhile, when the base plate is reset, vibration is generated on the base plate under the action of the pressed mechanism at the moment, and therefore the metal dust can fall more sufficiently.

Description

Technical Field

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

[0002] With the development of industry, metal processing methods are becoming more and more diversified, especially the production method of metal additives. After the metal powder is heated and melted, it is quickly sprayed out with a nozzle and solidified on the surface of the processed metal to obtain the required metal shape. At the same time, the manufacturing method of metal additives has also been included in the ranks of sustainable development.

[0003] At present, when metal additive manufacturing is carried out, the sprayed powder cannot be completely combined with the metal to be processed, and the scattered high-temperature powder will adhere to the surface of the substrate. The substrate needs to be cleaned regularly to complete the recovery of the metal powder. The existing equipment uses vibration to make the metal powder fall off the substrate during recovery. However, the adhesion of the high-temperature metal powder to the substrate and the water vapor formed on the substrate when the high-temperature powder meets the cold substrate cause the adhesion between the powder and the substrate to be too large. It is difficult to completely remove the powder from the substrate through vibration, which greatly affects the recovery efficiency of the powder.

[0004] Based on this, the present invention designs a powder cleaning device for metal additive manufacturing to solve the above problems. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a powder cleaning device for metal additive manufacturing, aiming to solve the technical problems existing in the prior art mentioned in the background technology.

[0006] The embodiment of the present invention is implemented as follows: a powder cleaning device for metal additive manufacturing, the device comprising: Main frame: including a mounting platform arranged on the main frame, a fixing frame is fixedly installed on the surface of the mounting platform, and a collection box is installed inside the fixing frame; The scraping mechanism includes a base plate installed inside the fixed frame, and a movable scraping block installed inside the fixed frame. A heating wire is arranged inside the movable scraping block, and a gathering scraper is slidably connected to the surface of the movable scraping block. Flipping mechanism: used to drive the substrate to flip and simultaneously drive the substrate to move in the vertical direction; Pressure mechanism: used to drive the moving scraper block to move horizontally.

[0007] Furthermore, the flipping mechanism includes two flipping gears fixedly mounted on the base plate, each flipping gear is meshed with a flipping rack, the flipping rack is fixedly mounted on the inner wall of the fixed frame, the flipping gear is rotationally connected to the inner wall of the support block, and a damper is arranged between the flipping gear and the support block.

[0008] Furthermore, the pressure mechanism includes a pressure frame slidably connected to the inner wall of the fixed frame, and the pressure frame is connected to the inner wall of the fixed frame through a return spring, and a collecting box is fixedly installed on the surface of the pressure frame, and two rotating screws are passed through the inside of the pressure frame and are rotatably connected to the rotating screw, and the inner wall of each rotating screw is slidably connected to the first ratchet gear, the first ratchet gear is meshed with the first rack, the first rack is fixedly installed on the inner wall of the fixed frame, a connecting shaft is fixedly installed on the surface of the first ratchet gear, the connecting shaft is slidably connected to the inner wall of the rotating screw, an end of the connecting shaft away from the first ratchet gear is fixedly connected to the second ratchet gear, the second ratchet gear is slidably connected to the inner wall of the rotating screw, the second ratchet gear is meshed with the second rack, the second rack is fixedly installed on the inner wall of the fixed frame, the rotating screw and the moving slider form a spiral pair transmission, and a connecting block is fixedly installed on the surface of the moving slider, the connecting block is slidably connected to the inner wall of the pressure frame, and the end of the connecting block away from the moving slider is connected to the moving scraper block, and the first ratchet gear and the second ratchet gear are both rotatably connected to the swing mechanism.

[0009] Furthermore, the swing mechanism includes two swing cylinders fixedly mounted on the pressure frame, a cross-linking rod is fixedly mounted on the output end of each swing cylinder, a linkage slider is fixedly mounted on the surface of the cross-linking rod, the linkage slider is slidably connected to the surface of the pressure frame, a linkage rod passes through the interior of the linkage slider and is fixedly connected to the linkage rod, a first connecting plate and a second connecting plate are fixedly mounted on both ends of the linkage rod, the first connecting plate is rotatably connected to the first ratchet gear, the second connecting plate is rotatably connected to the second ratchet gear, and the first connecting plate and the second connecting plate are both slidably connected to the rotating screw.

[0010] Furthermore, the device also includes a reciprocating mechanism, which includes a reciprocating motor fixedly mounted on a moving slider, a fixed plate fixedly mounted on the surface of the moving slider, an output end of the reciprocating motor passes through the fixed plate and is rotatably connected to the fixed plate, a rotating gear is fixedly mounted on the output end of the reciprocating motor, the rotating gear is meshed with a transmission gear set, the transmission gear set passes through a connecting block and is rotatably connected to the connecting block, the other end of the transmission gear set is meshed with a driven gear, the driven gear is fixedly mounted on the surface of the reciprocating screw rod, and the reciprocating screw rod is rotatably connected to the inner wall of the moving scraper block.

[0011] Furthermore, the device also includes a driving mechanism, which includes a driving motor fixedly mounted on the mounting table, the output end of the driving motor passes through the mounting table and is rotatably connected to the mounting table, a bevel gear group is fixedly mounted on the output end of the driving motor, the inner wall of the bevel gear group is fixedly connected to the main screw rod, the main screw rod is rotatably connected to the mounting table, and the main screw rod and the main slider form a spiral pair transmission, and a support block is fixedly mounted on the surface of the main slider.

[0012] Furthermore, the cross section of the movable scraper block is set to be trapezoidal.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention drives the moving scraper block to move laterally along the surface of the substrate through the action of the pressure mechanism, thereby scraping off the metal dust on the substrate, so as to achieve the purpose of fully cleaning and recovering the attached metal dust, and through the operation of the heating wire inside the moving scraper block, the water vapor on the metal dust evaporates, thereby preventing the dust from adhering to the moving scraper block. At the same time, when the substrate is reset, the pressure mechanism generates vibration on the substrate, so that the metal dust falls more fully.

[0014] 2. The present invention drives the collecting scraper to slide along the moving scraper block through the transmission action of the spiral pair, collects the powder scraped off and adhered to the moving scraper block, and then drops the powder into the collection box under the action of the gravity of the powder, thereby achieving the purpose of concentrating the powder for rapid falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a powder cleaning device for metal additive manufacturing provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 It is a schematic diagram of the installation position structure of the flip rack of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B; Figure 6 It is a schematic cross-sectional structure diagram of a powder cleaning device for metal additive manufacturing according to the present invention from another viewing angle; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at C; Figure 8 For the present invention Figure 6 A schematic diagram of the structure at D of FIG. Fig. 9It is a schematic cross-sectional structure diagram of another viewing angle of a powder cleaning device for metal additive manufacturing of the present invention; Fig.10 For the present invention Fig. 9 A schematic diagram of the structure at E of FIG. Fig.11 This is a schematic diagram of the installation position structure of the collection box of the present invention; Fig.12 For the present invention Fig.11 Enlarged structural diagram of F.

[0016] In the attached drawings: 1, main frame; 101, mounting platform; 102, fixed frame; 103, collecting box; 2, scraping mechanism; 201, base plate; 202, moving scraper block; 203, gathering scraper; 3, flip mechanism; 301, flip gear; 302, flip rack; 303, support block; 4, pressure mechanism; 401, pressure frame; 402, rotating screw; 403, first ratchet gear; 404, first rack; 405, connecting shaft; 406, second ratchet gear; 407, second rack; 408, moving Moving slider; 409, connecting block; 5, swing mechanism; 501, swing cylinder; 502, cross connecting rod; 503, linkage slider; 504, linkage rod; 505, first connecting plate; 506, second connecting plate; 6, reciprocating mechanism; 601, reciprocating motor; 602, fixed plate; 603, rotating gear; 604, transmission gear set; 605, driven gear; 606, reciprocating screw; 7, driving mechanism; 701, driving motor; 702, bevel gear set; 703, main screw; 704, main slider. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0019] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, in one embodiment, a powder cleaning device for metal additive manufacturing is provided, the device comprising: The main frame 1 includes a mounting platform 101 disposed on the main frame 1 , a fixing frame 102 is fixedly mounted on the surface of the mounting platform 101 , and a collection box 103 is installed inside the fixing frame 102 ; The scraping mechanism 2 includes a base plate 201 installed inside the fixed frame 102, and also includes a moving scraper block 202 installed inside the fixed frame 102. A heating wire is arranged inside the moving scraper block 202, and a gathering scraper plate 203 is slidably connected to the surface of the moving scraper block 202. Flipping mechanism 3: used to drive the substrate 201 to flip and drive the substrate 201 to move in the vertical direction; The pressure mechanism 4 is used to drive the movable scraper block 202 to move in the horizontal direction.

[0020] In practical application of the embodiment of the present invention, when cleaning and recycling the substrate 201, as shown in FIG. Figure 2 and Figure 3 As shown, at this time, the substrate 201 is driven to move downward under the action of the flipping mechanism 3, and the substrate 201 rotates during the descending process. At this time, the metal dust accumulated on the substrate 201 falls into the collecting box 103. Due to the blocking effect of the fixed frame 102, the harm of dust is avoided. After the substrate 201 flips 180 degrees, the substrate 201 continues to descend, and the compressed mechanism 4 is driven to move downward synchronously by squeezing the compressed mechanism 4, as shown in FIG. Figure 6 and Figure 7 As shown, the movable scraper block 202 is driven by the pressure mechanism 4 to move laterally along the surface of the substrate 201, thereby scraping off the metal dust on the substrate 201, so as to achieve the purpose of fully cleaning and recovering the attached metal dust, and the water vapor on the metal dust is evaporated by the operation of the internal heating wire of the movable scraper block 202, thereby preventing the dust from adhering to the movable scraper block 202. At the same time, when the substrate 201 is reset, the pressure mechanism 4 generates vibration on the substrate 201, so that the metal dust falls more fully.

[0021] like Figure 2 and Figure 3 As shown, as a preferred embodiment of the present invention, the flipping mechanism 3 includes two flipping gears 301 fixedly mounted on the base plate 201, each flipping gear 301 is meshed with a flipping rack 302, the flipping rack 302 is fixedly mounted on the inner wall of the fixed frame 102, the flipping gear 301 is rotatably connected to the inner wall of the support block 303, and a damper is arranged between the flipping gear 301 and the support block 303.

[0022] In practical application of the embodiment of the present invention, when performing a cleaning operation on the substrate 201, as shown in FIG. Figure 2 and Figure 3As shown, at this time, the flip gear 301 is driven to move downward by the support block 303, and the downward movement of the flip gear 301 drives the substrate 201 to move downward synchronously. At the same time, the meshing action of the gear rack drives the flip gear 301 to rotate, and then drives the substrate 201 to flip 180 degrees, so that the powder accumulated on the substrate 201 falls into the collection box 103 below.

[0023] like Figure 6 , Figure 7 Hehe Figure 8 As shown, as another preferred embodiment of the present invention, the pressure mechanism 4 includes a pressure frame 401 that is slidably connected to the inner wall of the fixed frame 102, and the pressure frame 401 is connected to the inner wall of the fixed frame 102 through a reset spring, and a collection box 103 is fixedly installed on the surface of the pressure frame 401, and two rotating screws 402 are passed through the inside of the pressure frame 401 and are rotatably connected to the rotating screw 402, and the inner wall of each rotating screw 402 is slidably connected to the first ratchet gear 403, and the first ratchet gear 403 is meshed with the first rack 404, and the first rack 404 is fixedly installed on the inner wall of the fixed frame 102, and a connecting shaft 405 is fixedly installed on the surface of the first ratchet gear 403, and the connecting shaft 405 is connected to the rotating screw The inner wall of 402 is slidably connected, and the end of the connecting shaft 405 away from the first ratchet gear 403 is fixedly connected to the second ratchet gear 406, the second ratchet gear 406 is slidably connected to the inner wall of the rotating screw rod 402, the second ratchet gear 406 is meshed with the second rack 407, the second rack 407 is fixedly installed on the inner wall of the fixed frame 102, the rotating screw rod 402 and the moving slider 408 form a spiral pair transmission, and a connecting block 409 is fixedly installed on the surface of the moving slider 408, the connecting block 409 is slidably connected to the inner wall of the pressure frame 401, and the end of the connecting block 409 away from the moving slider 408 is connected to the moving scraper block 202, and the first ratchet gear 403 and the second ratchet gear 406 are both rotatably connected to the swing mechanism 5.

[0024] In actual application of the embodiment of the present invention, when the substrate 201 continues to move downward after being turned over, the substrate 201 presses the pressure frame 401 to move downward. Figure 6 and Figure 7 As shown, the downward movement of the pressure frame 401 drives the first ratchet gear 403 to move downward, and the reset spring connected to the inner wall of the pressure frame 401 and the fixed frame 102 is used to reset the pressure frame 401. At this time, the rotating screw 402 is driven to rotate by the meshing action of the gear rack, as shown in FIG. Figure 7 As shown, from Figure 7From the front view, the rotation of the rotating screw rod 402 drives the moving slider 408 to move obliquely to the lower left, and then drives the moving scraper block 202 to move horizontally through the connection of the mechanism, so as to achieve the purpose of scraping off the powder on the surface of the substrate 201. When the moving scraper block 202 moves to the other end, the substrate 201 rises and resets again. At this time, under the action of the first ratchet gear 403 itself, due to the limiting effect of the first rack 404, the teeth on the first ratchet gear 403 are constantly moved, thereby generating a vibration on the first ratchet gear 403, and through the mechanism The transmission effect transmits the vibration to the movable scraper block 202, so that the powder can be cleaned and shed more fully. At the same time, when the substrate 201 is reset to no longer squeeze the pressure frame 401, under the action of the swing mechanism 5, the first ratchet gear 403 is disengaged from the first rack 404, and the second ratchet gear 406 is engaged with the second rack 407. When cleaning next time, the meshing action of the second ratchet gear 406 and the second rack 407 drives the rotating screw 402 to reverse, thereby driving the movable scraper block 202 to move in the opposite horizontal direction to scrape and clean the powder on the substrate 201.

[0025] like Figure 4 and Figure 5 As shown, as another preferred embodiment of the present invention, the swing mechanism 5 includes two swing cylinders 501 fixedly mounted on the pressure frame 401, and a cross-linking rod 502 is fixedly mounted on the output end of each swing cylinder 501, and a linkage slider 503 is fixedly mounted on the surface of the cross-linking rod 502, and the linkage slider 503 is slidably connected to the surface of the pressure frame 401, and a linkage rod 504 passes through the interior of the linkage slider 503 and is fixedly connected to the linkage rod 504, and a first connecting plate 505 and a second connecting plate 506 are fixedly mounted on both ends of the linkage rod 504, the first connecting plate 505 is rotatably connected to the first ratchet gear 403, the second connecting plate 506 is rotatably connected to the second ratchet gear 406, and the first connecting plate 505 and the second connecting plate 506 are both slidably connected to the rotating screw 402.

[0026] In actual application of the embodiment of the present invention, when the base plate 201 is reset to no longer press the pressure frame 401, the swing cylinder 501 starts to operate. Figure 5 As shown, from Figure 5 When viewed from the front, the operation of the swing cylinder 501 drives the cross-link 502 to move to the left, and then drives the linkage rod 504 to move to the left, so that the first ratchet gear 403 is disengaged from the first rack 404, and the second ratchet gear 406 is engaged with the second rack 407, thereby achieving a switching effect, so that the scraper block 202 can move in the opposite horizontal direction during the next cleaning.

[0027] like Fig.10 , Fig.11 and Fig.12As shown, as another preferred embodiment of the present invention, the device also includes a reciprocating mechanism 6, the reciprocating mechanism 6 includes a reciprocating motor 601 fixedly mounted on a moving slider 408, a fixed plate 602 is fixedly mounted on the surface of the moving slider 408, the output end of the reciprocating motor 601 passes through the fixed plate 602 and is rotatably connected to the fixed plate 602, a rotating gear 603 is fixedly mounted on the output end of the reciprocating motor 601, the rotating gear 603 is meshed with a transmission gear set 604, the transmission gear set 604 passes through the connecting block 409 and is rotatably connected to the connecting block 409, the other end of the transmission gear set 604 is meshed with a driven gear 605, the driven gear 605 is fixedly mounted on the surface of a reciprocating screw rod 606, and the reciprocating screw rod 606 is rotatably connected to the inner wall of the moving scraper block 202.

[0028] In practical application of the embodiment of the present invention, when the substrate 201 completes the horizontal movement, Fig.11 and Fig.12 As shown, at this time, the reciprocating motor 601 starts to run, and the operation of the reciprocating motor 601 drives the rotating gear 603 to rotate, and then drives the reciprocating screw rod 606 to rotate through the gear meshing transmission effect, as shown in FIG. Fig.10 As shown, the collecting scraper 203 is driven by the spiral pair to slide along the moving scraper block 202, so as to collect the powder scraped off and adhered to the moving scraper block 202, and then the powder falls into the collecting box 103 under the action of gravity, thereby achieving the purpose of concentrating the powder for rapid falling.

[0029] like Figure 1 and Figure 3 As shown, as another preferred embodiment of the present invention, the device also includes a driving mechanism 7, the driving mechanism 7 includes a driving motor 701 fixedly mounted on the mounting table 101, the output end of the driving motor 701 passes through the mounting table 101 and is rotatably connected to the mounting table 101, the output end of the driving motor 701 is fixedly mounted with a bevel gear set 702, the inner wall of the bevel gear set 702 is fixedly connected to a main screw rod 703, the main screw rod 703 is rotatably connected to the mounting table 101, and the main screw rod 703 and the main slider 704 form a spiral pair transmission, and the surface of the main slider 704 is fixedly mounted with a support block 303.

[0030] In actual application of the embodiment of the present invention, when cleaning and recovering the powder on the substrate 201, the driving motor 701 starts to run. Figure 1 As shown, the operation of the driving motor 701 drives the bevel gear set 702 to rotate, and then drives the main screw rod 703 to rotate synchronously. At this time, through the helical pair transmission effect, as shown in FIG. Figure 3 As shown, from Figure 3 From the front view direction, the main slider 704 is driven to move downward, thereby driving the substrate 201 to move downward.

[0031] like Fig. 9 and Fig.10 As shown, as another preferred embodiment of the present invention, the cross-section of the movable scraper block 202 is set to be trapezoidal.

[0032] In practical application, the embodiment of the present invention is as follows: Fig.10 As shown, by the trapezoidal setting of the movable scraper block 202 , when the movable scraper block 202 scrapes the surface of the substrate 201 , the fallen powder moves downward under the action of gravity, thereby preventing the powder from adhering to the surface of the movable scraper block 202 .

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder cleaning device for metal additive manufacturing, characterized in that: The device comprises: The main frame (1) comprises a mounting platform (101) arranged on the main frame (1), a fixing frame (102) being fixedly mounted on the surface of the mounting platform (101), and a collection box (103) being mounted inside the fixing frame (102); The scraping mechanism (2) comprises a base plate (201) mounted inside the fixed frame (102), and also comprises a movable scraping block (202) mounted inside the fixed frame (102), a heating wire is arranged inside the movable scraping block (202), and a gathering scraper (203) is slidably connected to the surface of the movable scraping block (202); A turning mechanism (3): used to drive the substrate (201) to turn over and simultaneously drive the substrate (201) to move in a vertical direction; The pressure-bearing mechanism (4) is used to drive the movable scraper block (202) to move in the horizontal direction.

2. A powder cleaning device for metal additive manufacturing according to claim 1, characterized in that: The flipping mechanism (3) comprises two flipping gears (301) fixedly mounted on the base plate (201), each flipping gear (301) meshing with a flipping rack (302), the flipping rack (302) fixedly mounted on the inner wall of the fixed frame (102), the flipping gear (301) being rotatably connected to the inner wall of the support block (303), and a damper being arranged between the flipping gear (301) and the support block (303).

3. A powder cleaning device for metal additive manufacturing according to claim 2, characterized in that: The pressure mechanism (4) comprises a pressure frame (401) slidably connected to the inner wall of the fixed frame (102), and the pressure frame (401) is connected to the inner wall of the fixed frame (102) via a return spring, a collecting box (103) is fixedly installed on the surface of the pressure frame (401), two rotating screws (402) are passed through the interior of the pressure frame (401) and are both rotatably connected to the rotating screws (402), the inner wall of each rotating screw (402) is slidably connected to a first ratchet gear (403), the first ratchet gear (403) is meshed with a first rack (404), the first rack (404) is fixedly installed on the inner wall of the fixed frame (102), a connecting shaft (405) is fixedly installed on the surface of the first ratchet gear (403), and the connecting shaft (405) is slidably connected to the inner wall of the rotating screw (402). The end of the connecting shaft (405) away from the first ratchet gear (403) is fixedly connected to the second ratchet gear (406), the second ratchet gear (406) is slidably connected to the inner wall of the rotating screw (402), the second ratchet gear (406) is meshed with the second rack (407), the second rack (407) is fixedly installed on the inner wall of the fixed frame (102), the rotating screw (402) and the moving slider (408) form a spiral pair transmission, the surface of the moving slider (408) is fixedly installed with a connecting block (409), the connecting block (409) is slidably connected to the inner wall of the pressure frame (401), the end of the connecting block (409) away from the moving slider (408) is connected to the moving scraper block (202), and the first ratchet gear (403) and the second ratchet gear (406) are both rotatably connected to the swing mechanism (5).

4. A powder cleaning device for metal additive manufacturing according to claim 3, characterized in that: The swing mechanism (5) comprises two swing cylinders (501) fixedly mounted on the pressure frame (401); a cross connecting rod (502) is fixedly mounted on the output end of each swing cylinder (501); a linkage slider (503) is fixedly mounted on the surface of the cross connecting rod (502); the linkage slider (503) is slidably connected to the surface of the pressure frame (401); a linkage rod (504) penetrates the interior of the linkage slider (503) and is fixedly connected to the linkage rod (504); a first connecting plate (505) and a second connecting plate (506) are fixedly mounted on both ends of the linkage rod (504); the first connecting plate (505) is rotatably connected to the first ratchet gear (403); the second connecting plate (506) is rotatably connected to the second ratchet gear (406); and both the first connecting plate (505) and the second connecting plate (506) are slidably connected to the rotating screw rod (402).

5. The powder cleaning device for metal additive manufacturing according to claim 3, characterized in that: The device further comprises a reciprocating mechanism (6), the reciprocating mechanism (6) comprising a reciprocating motor (601) fixedly mounted on a moving slider (408), a fixed plate (602) fixedly mounted on the surface of the moving slider (408), an output end of the reciprocating motor (601) passing through the fixed plate (602) and being rotatably connected to the fixed plate (602), a rotating gear (603) fixedly mounted on the output end of the reciprocating motor (601), the rotating gear (603) meshing with a transmission gear set (604), the transmission gear set (604) passing through a connecting block (409) and being rotatably connected to the connecting block (409), the other end of the transmission gear set (604) meshing with a driven gear (605), the driven gear (605) fixedly mounted on the surface of a reciprocating screw rod (606), and the reciprocating screw rod (606) being rotatably connected to the inner wall of the moving scraper block (202).

6. The powder cleaning device for metal additive manufacturing according to claim 2, characterized in that: The device further comprises a driving mechanism (7), the driving mechanism (7) comprising a driving motor (701) fixedly mounted on the mounting platform (101), the output end of the driving motor (701) passing through the mounting platform (101) and being rotationally connected to the mounting platform (101), a bevel gear set (702) being fixedly mounted on the output end of the driving motor (701), the inner wall of the bevel gear set (702) being fixedly connected to a main screw rod (703), the main screw rod (703) being rotationally connected to the mounting platform (101), the main screw rod (703) and the main slider (704) forming a helical pair transmission, and a support block (303) being fixedly mounted on the surface of the main slider (704).

7. The powder cleaning device for metal additive manufacturing according to claim 1, characterized in that: The cross section of the movable scraper block (202) is arranged to be trapezoidal.

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