Additive manufacturing powder spreading device

Abstract

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing powder spreading device which comprises a device base. A hydraulic cylinder is fixedly connected into the center of the device base; the output end of the hydraulic cylinder is fixedly connected with a supporting column. The supporting plate and the multiple splicing plates are spliced according to different sizes of products, powder laying bottom plates of different sizes are adaptively spliced, a traditional powder laying bottom plate of a fixed size is replaced, a part of powder laying area is reduced, and therefore the powder laying efficiency is improved, metal powder is contained in the powder laying box and slides along with a second electric sliding block for powder laying, and the powder laying efficiency is improved. The two storage boxes are fixed to the two ends of the device base, when the powder laying box slides to the bottom end of the flow guide box, the metal powder stored in the storage boxes is guided by the flow guide box to fall into the powder laying box, and the effect of feeding the powder laying box is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of additive manufacturing, and in particular to an additive manufacturing powder spreading device. Background Art

[0002] Additive manufacturing is an advanced technology that uses a layer-by-layer accumulation of materials to manufacture physical parts. Additive manufacturing is also called 3D printing. Additive manufacturing builds three-dimensional objects by laying powder layer by layer and using laser sintering and solidification. Therefore, additive manufacturing is the opposite of traditional subtractive manufacturing.

[0003] Additive manufacturing mainly includes several steps: design, slicing, printing and post-processing. First, a three-dimensional model is designed using computer-aided design software. The three-dimensional model is then sliced ​​into a series of two-dimensional layers. A 3D printer is then used to apply powder and print layer by layer according to the slicing information, and finally the designed three-dimensional object is constructed.

[0004] In the process of additive manufacturing, the current powder-laying device for additive manufacturing needs to fill the powder-laying area in layers for each 3D model printed. The size of the area where the powder is laid is fixed. However, when additive manufacturing products of different sizes, the size of the powder-laying area remains unchanged, which results in not only high material consumption, but also easy to affect the efficiency of powder laying for additive manufacturing.

[0005] To this end, the present invention provides an additive manufacturing powder spreading device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: an additive manufacturing powder spreading device described in the present invention comprises a device base; a hydraulic cylinder is fixedly connected to the central interior of the device base; a support column is fixedly connected to the output end of the hydraulic cylinder; a support plate is fixedly connected to the top of the support column, and a plurality of No. 1 plug-in holes are provided on both sides of the support plate; splicing plates are provided on both sides of the support plate, and a plurality of No. 2 plug-in holes are provided on the side of the splicing plate away from the support plate; a plurality of plug-in rods are fixedly connected to the side of the splicing plate close to the support plate, and the diameters of the plug-in rods correspond to the diameters of the No. 1 plug-in holes and the No. 2 plug-in holes; the inner wall of the device base close to both sides of the support plate is slidably connected with a baffle through a No. 1 electric slider; a matching component is provided at the top of the device base, and the matching component is used to match the support plate for powder spreading.

[0008] Preferably, the mating component includes a powder spreading box and a sealing plate; the powder spreading box is slidably connected to the top of the device base through a No. 2 electric slider; the sealing plate is slidably connected to the bottom inner wall of the powder spreading box through a No. 3 electric slider.

[0009] Preferably, connecting plates are fixedly connected to both sides of the powder spreading box; a scraper is fixedly connected to one side of the outer wall of the connecting plate close to the bottom of the powder spreading box; and side plates are fixedly connected to both sides of the connecting plate.

[0010] Preferably, a pair of symmetrically arranged support frames are fixedly connected to the outer wall of the device base; and a material storage box is fixedly connected to one end of the two support frames away from the device base.

[0011] Preferably, a guide box is fixedly connected to the bottom ends of the two material storage boxes; the guide box is located at the bottom feed opening of the material storage box, and the bottom port diameter of the guide box is smaller than the top port diameter of the powder spreading box.

[0012] Preferably, the outer walls of the two support frames are symmetrically fixed with fixed frames; the inner walls of the fixed frames are slidably connected with multiple sliding rods; the ends of the sliding rods are fixed with right-angle plates, and the right-angle plates are fixed to multiple sliding rods; elastic members are sleeved on the sliding rods, and the elastic members are located between the fixed frames and the right-angle plates.

[0013] Preferably, recovery grooves are provided on both sides of the top of the device base; the bottom cross-section of the recovery groove is an inverted trapezoid; and an inclined groove is provided inside the device base between the recovery groove and the support plate.

[0014] Preferably, a rubber plate is fixed to the top of the support plate, and the bottom ends of the rubber plate are fixed to the top ends of the support plate; an electric cylinder is fixed inside the top of the support column; a long strip is fixed to the output end of the electric cylinder, and the long strip is located between the support plate and the rubber plate.

[0015] Preferably, a delivery pump is fixedly connected to the support frame; an extraction pipe is fixedly connected to the outer wall of the delivery pump, and the extraction pipe is connected to the bottom of the recovery tank; a delivery pipe is fixedly connected to the top of the delivery pump, and the delivery pipe passes through the support frame and is connected to the inside of the storage box.

[0016] Preferably, a plurality of the splicing plates are provided; two splicing plates are spliced ​​together via two plug-in rods.

[0017] The beneficial effects of the present invention are as follows: 1. The powder spreading device for additive manufacturing described in the present invention can be spliced ​​with a support plate and a plurality of splicing plates according to the size of the product to adaptively splice powder spreading base plates of different sizes, thereby replacing the traditional fixed-size powder spreading base plates and reducing part of the powder spreading area, thereby improving the efficiency of powder spreading. The metal powder loaded in the powder spreading box is slid along the No. 2 electric slider to spread the powder, and the scraper is used to flatten the spread metal powder, thereby playing a role in uniform powder spreading during additive manufacturing. Two material storage boxes are fixed at the two ends of the device base. When the powder spreading box slides to the bottom of the guide box, the metal powder stored in the material storage box is guided by the guide box to fall into the powder spreading box, thereby playing a role in loading the powder into the powder spreading box.

[0018] 2. The additive manufacturing powder spreading device described in the present invention realizes the function of controlling and sealing the bottom of the guide box by sliding and squeezing the powder spreading box with the right-angle plate set, and the recovery groove and the inclined groove are respectively opened inside the base of the device to recover and store the remaining metal powder, and the electric cylinder is used to drive the middle part of the rubber plate on the top of the long plate to form a slope on both sides of the rubber plate to guide the remaining metal powder to fall, thereby realizing the function of auxiliary collection of the metal powder, relying on the conveying pump to cooperate with the extraction pipe to extract the metal powder collected in the recovery groove, and the metal powder is delivered to the storage box by the conveying pipe, so as to achieve the effect of recycling the metal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a stereogram of the present invention; Figure 2 It is a schematic diagram of the structure of the powder spreading box in the present invention; Figure 3 It is a structural schematic diagram of the blocking plate in the present invention; Figure 4 It is a structural schematic diagram of the support plate in the present invention; Figure 5 It is a structural schematic diagram of the material storage box in the present invention; Figure 6 It is a partial structural cross-sectional view of the powder spreading box in the present invention; Figure 7 It is a structural schematic diagram of the sliding rod in the present invention.

[0021] In the figure: 1. device base; 11. hydraulic cylinder; 12. support column; 13. support plate; 14. splicing plate; 15. plug-in rod; 16. baffle; 2. powder box; 21. sealing plate; 3. connecting plate; 31. scraper; 32. side plate; 4. support frame; 41. material storage box; 5. guide box; 6. fixed frame; 61. sliding rod; 62. right-angle plate; 63. elastic part; 7. recovery trough; 8. rubber plate; 81. electric cylinder; 82. long strip plate; 9. delivery pump; 91. extraction pipe; 92. delivery pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figures 1 to 4 , Figure 6As shown, an additive manufacturing powder spreading device according to an embodiment of the present invention comprises a device base 1; a hydraulic cylinder 11 is fixedly connected to the center of the device base 1; a support column 12 is fixedly connected to the output end of the hydraulic cylinder 11; a support plate 13 is fixedly connected to the top of the support column 12, and a plurality of No. 1 plug-in holes are provided on both sides of the support plate 13; a splicing plate 14 is provided on both sides of the support plate 13, and a plurality of No. 2 plug-in holes are provided on the side of the splicing plate 14 away from the support plate 13; a plurality of plug-in rods 15 are fixedly connected to the side of the splicing plate 14 close to the support plate 13, and the diameter of the plug-in rod 15 is the same as that of the No. 1 plug-in hole and the No. 2 plug-in hole. The diameter of the connecting hole corresponds to that of the connecting hole; the inner wall of the device base 1 is slidably connected to the baffle 16 on both sides close to the support plate 13 through a No. 1 electric slider; a matching component is provided at the top of the device base 1, and the matching component is used to cooperate with the support plate 13 for powder spreading; when powder is spread in additive manufacturing, the device base 1 is used as the main frame of the powder spreading device, and a laser device is arranged above the device base 1. The laser device is used to laser melt or sinter the solidified powder material when stacking layer by layer. First, according to the size of the printed product, the two splicing plates 14 are respectively fixed on both sides of the support plate 13 by a plurality of plug-in rods 15, and a plurality of plug-in rods are arranged. The rods 15 are respectively inserted into multiple No. 1 plug-in holes. If the printed product is too large, another splicing board 14 is spliced ​​on the other side of the splicing board 14 that has been spliced ​​on the support plate 13. Multiple plug-in rods 15 are installed on the other splicing board 14 and are respectively inserted into the No. 2 plug-in holes of the previous splicing board 14 until the support plate 13 cooperates with the multiple splicing boards 14 to be suitable for the size of the currently printed product. If the printed product is small, only the support plate 13 is used to bear the metal powder for spreading the powder. After adjusting the width of the powder spreading base plate spliced ​​by the support plate 13 and the multiple splicing boards 14, the two baffles 16 are respectively slid through the No. 1 electric slider to fit tightly. The two outermost splicing plates 14 are matched with the components to be loaded with metal powder and then evenly spread the powder on the spliced ​​powder-spreading base plates. Each time a layer of powder is spread, a laser device is used above the support plate 13 to sinter and solidify the metal powder through a laser beam. After sintering, the output end of the hydraulic cylinder 11 drives the support plate 13 on the support column 12 and multiple splicing plates 14 to slide down a distance of one layer of powder, and the powder is spread and solidified in turn until the product is manufactured. According to the size of the product, powder-spreading base plates of different sizes are adaptively spliced ​​to replace the traditional fixed-size powder-spreading base plates, reduce part of the powder-spreading area, and reduce the consumables of powder-spreading, thereby improving the efficiency of powder-spreading.

[0024] The matching components include a powder spreading box 2 and a sealing plate 21; the powder spreading box 2 is slidably connected to the top of the device base 1 through the No. 2 electric slider; the sealing plate 21 is slidably connected to the bottom inner wall of the powder spreading box 2 through the No. 3 electric slider; when spreading powder for additive manufacturing, metal powder is poured into the interior of the powder spreading box 2, and the No. 2 electric slider drives the powder spreading box 2 to slide close to the spliced ​​powder spreading bottom plate, and then the No. 3 electric slider drives the sealing plate 21 that originally blocks the bottom of the powder spreading box 2 to slide. After the sealing plate 21 slides, it opens the bottom of the powder spreading box 2, so that the metal powder temporarily stored in the powder spreading box 2 falls onto the powder spreading bottom plate, and the powder spreading box 2 slides back and forth with the No. 2 electric slider, which plays the role of spreading powder for additive manufacturing.

[0025] Both sides of the powder spreading box 2 are fixedly connected with connecting plates 3; a scraper 31 is fixedly connected to the outer wall of the connecting plate 3 near the bottom side of the powder spreading box 2; both sides of the connecting plate 3 are fixedly connected with side plates 32; when the powder spreading box 2 slides along with the No. 2 electric slider to spread powder, the connecting plate 3 cooperates with the scraper 31 to slide synchronously with the powder spreading box 2, the scraper 31 scrapes the spread metal powder, and cooperates with the two side plates 32 to block the metal powder scraped by the scraper 31, so that the spread metal powder layer is smoother, thereby improving the effect of laser beam solidification of the metal powder.

[0026] like Figure 1 , Figure 2 and Figure 5 As shown, a pair of symmetrically arranged support frames 4 are fixedly connected to the outer wall of the device base 1; a storage box 41 is fixedly connected to one end of the two support frames 4 away from the device base 1; when metal powder is loaded into the powder box 2, the two support frames 4 are used to fix the two storage boxes 41 at the two end positions of the device base 1 respectively, a large amount of metal powder is stored in the two storage boxes 41, and the discharge port of the storage box 41 is blocked, and after the No. 2 electric slider drives the powder box 2 to slide from one side of the device base 1 to the other side of the device base 1, the metal powder in the powder box 2 is laid on the powder base plate or powder layer, and the powder box 2 slides to the bottom position of the storage box 41. At this time, the bottom discharge port of the storage box 41 is opened, and the metal powder in the storage box 41 is discharged into the internal storage of the powder box 2, which plays a role in loading the inside of the powder box 2.

[0027] The bottom ends of the two storage boxes 41 are fixedly connected with a guide box 5; the guide box 5 is located at the bottom discharge port of the storage box 41, and the bottom port diameter of the guide box 5 is smaller than the top port diameter of the powder spreading box 2; when the metal powder inside the storage box 41 is discharged into the powder spreading box 2, the guide box 5 is fixed at the discharge port of the storage box 41, and the bottom end of the guide box 5 is sealed first, and a large amount of metal powder is stored in the storage box 41. When the No. 2 electric slider drives the powder spreading box 2 to slide to the bottom end of the guide box 5, the bottom end of the guide box 5 is opened, and the metal powder in the storage box 41 is guided along the small opening at the bottom end of the guide box 5 to fall into the large opening at the top end of the powder spreading box 2, thereby achieving the function of guiding the feeding of the inside of the powder spreading box 2.

[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the outer walls of the two support frames 4 are symmetrically fixed with fixed frames 6; the inner walls of the fixed frames 6 are slidably connected with multiple sliding rods 61; the ends of the sliding rods 61 are fixed with right-angle plates 62, and the right-angle plates 62 are fixed to multiple sliding rods 61; elastic members 63 are sleeved on the sliding rods 61, and the elastic members 63 are located between the fixed frames 6 and the right-angle plates 62; when the bottom end of the guide box 5 is controlled and blocked, the fixed frame 6 is fixed to the side of the support frame 4 away from the powder box 2, and the right-angle plates 62 slide on the fixed frame 6 through multiple sliding rods 61 On the top, as the No. 2 electric slider drives the powder box 2 to slide and squeeze the right-angle plate 62, the right-angle plate 62 slides to open the bottom end of the guide box 5, and multiple elastic parts 63 are squeezed and contracted by the right-angle plate 62. The metal powder inside the storage box 41 is guided along the guide box 5 and falls into the interior of the powder box 2. When the No. 2 electric slider drives the powder box 2 to slide away from the right-angle plate 62, the multiple elastic parts 63 elastically reset and squeeze the right-angle plate 62 to cooperate with the multiple sliding rods 61 to slide, and the right-angle plate 62 slides to block the bottom end of the guide box 5, thereby controlling and blocking the bottom end of the guide box 5.

[0029] like Figures 1 to 3 As shown, recovery grooves 7 are provided on both sides of the top of the device base 1; the bottom cross-sectional shape of the recovery groove 7 is an inverted trapezoid; an inclined groove is provided inside the device base 1 between the recovery groove 7 and the support plate 13; when the product is manufactured by additive manufacturing, the excess metal powder on the product is shaken off, and the excess metal powder falls into the two recovery grooves 7 on both sides through the inclined groove for temporary storage, and a large amount of metal powder is temporarily stored at the bottom of the inverted trapezoid of the recovery groove 7, which is convenient for the subsequent recovery and processing of the metal powder, and plays a role in recycling and storing the used metal powder.

[0030] like Figures 1 to 4 As shown, the top of the support plate 13 is fixedly connected to a rubber plate 8, and the bottom ends of both sides of the rubber plate 8 are fixedly connected to the top ends of both sides of the support plate 13; the top of the support column 12 is fixedly connected to an electric cylinder 81; the output end of the electric cylinder 81 is fixedly connected to a long strip plate 82, and the long strip plate 82 is located between the support plate 13 and the rubber plate 8; when the product is manufactured by additive manufacturing, the product is removed from the powder-laying bottom plate, and a large amount of unsolidified metal powder remains on the support plate 13. The baffle 16 is driven away from the support plate 13 by a No. 1 electric slider, and the output end of the electric cylinder 81 drives the long strip plate 82 to rise. The long strip plate 82 lifts up the middle part of the rubber plate 8 made of flexible material, so that slopes appear on both sides of the rubber plate 8, and a large amount of metal powder falls along the slope of the rubber plate 8 into the inclined groove of the device base 1, and then the metal powder falls into the recovery groove 7 for collection, which plays a role in recovering the remaining metal powder.

[0031] like Figures 1 to 3 , Figure 5 As shown, a delivery pump 9 is fixedly connected to the support frame 4; an extraction pipe 91 is fixedly connected to the outer wall of the delivery pump 9, and the extraction pipe 91 is connected to the bottom of the recovery tank 7; a delivery pipe 92 is fixedly connected to the top of the delivery pump 9, and the delivery pipe 92 passes through the support frame 4 and is connected to the inside of the storage box 41; when the remaining metal powder after additive manufacturing is stored in the recovery tank 7, the delivery pump 9 is used in conjunction with the extraction pipe 91 to extract the metal powder at the bottom of the recovery tank 7. The delivery pump 9 is a pump that can transport powder. After the metal powder is extracted, it is sent to the inside of the storage box 41 through the delivery pipe 92, thereby achieving the effect of recycling the metal powder.

[0032] like Figures 1 to 4 As shown, there are multiple splicing plates 14; two of the splicing plates 14 are spliced ​​together by two plug-in rods 15; when additive manufacturing is performed on a large-volume product, the support plate 13 is used as the main support for the powder-laying base plate, and multiple splicing plates 14 are spliced ​​on both sides of the support plate 13, until the powder-laying base plate spliced ​​by multiple splicing plates 14 and the support plate 13 can support the large-volume product, and multiple plug-in rods 15 are installed on one splicing plate 14 between the two splicing plates 14, and the multiple plug-in rods 15 are inserted into the No. 2 plug-in holes of the other splicing plate 14, thereby realizing the function of splicing and building the powder-laying base plate, which is suitable for additive manufacturing of products of different sizes.

[0033] Working process: When the powder is spread in additive manufacturing, the device base 1 is used as the main structure of the powder spreading device. A laser device is arranged on the top of the device base 1. The laser device is used to laser melt or sinter the solidified powder material when stacking layer by layer. First, according to the size of the printed product, two splicing plates 14 are respectively fixed on both sides of the support plate 13 by multiple plug-in rods 15. The multiple plug-in rods 15 are respectively inserted into multiple No. 1 plug-in holes. If the printed product is too large, another splicing plate 14 is spliced ​​on the other side of the splicing plate 14 that has been spliced ​​on the support plate 13. The other splicing plate 14 A plurality of plug-in rods 15 are installed on the top and are respectively inserted into the No. 2 plug-in holes of the previous splicing plate 14, until the support plate 13 cooperates with the plurality of splicing plates 14 to be suitable for the size of the currently printed product. If the printed product is small, only the support plate 13 is used to bear the metal powder for spreading the powder. After adjusting the width of the powder spreading base plate spliced ​​by the support plate 13 and the plurality of splicing plates 14, the two baffles 16 are respectively slid through the No. 1 electric slider to fit tightly with the two outermost splicing plates 14. After the metal powder is loaded into the matching assembly, the powder is evenly spread on the spliced ​​powder spreading base plate. Each time a layer of powder is spread, a laser device is used on the top of the support plate 13. The metal powder is solidified by sintering with a laser beam. After sintering, the output end of the hydraulic cylinder 11 drives the support plate 13 on the support column 12 and multiple splicing plates 14 to slide down a distance of one layer of powder, and the powder is spread and solidified in turn until the product is manufactured. According to the size of the product, different sizes of powder-spreading base plates are adaptively spliced ​​to replace the traditional fixed-size powder-spreading base plates, reduce part of the powder-spreading area, and thus improve the efficiency of powder-spreading. When adding material to powder, pour the metal powder into the powder-spreading box 2. As the No. 2 electric slide block drives the powder-spreading box 2 to slide close to the spliced ​​powder-spreading base plates, the No. 3 electric slide block then The block drives the blocking plate 21 that originally blocked the bottom of the powder spreading box 2 to slide, and the blocking plate 21 slides to open the bottom of the powder spreading box 2, so that the metal powder temporarily stored in the powder spreading box 2 falls onto the powder spreading bottom plate, and the powder spreading box 2 slides back and forth with the No. 2 electric slider, playing the role of powder spreading in additive manufacturing; when the powder spreading box 2 slides with the No. 2 electric slider to spread powder, the connecting plate 3 cooperates with the scraper 31 to slide synchronously with the powder spreading box 2, and the scraper 31 scrapes the spread metal powder, and cooperates with the two side plates 32 to block the metal powder scraped by the scraper 31, so that the spread metal powder layer is smoother, thereby improving the effect of laser beam solidification of metal powder; When metal powder is loaded into the powder box 2, two support frames 4 are used to fix two storage boxes 41 at the two end positions of the device base 1 respectively. A large amount of metal powder is stored in the two storage boxes 41, and the discharge port of the storage box 41 is blocked. After the No. 2 electric slider drives the powder box 2 to slide from one side of the device base 1 to the other side of the device base 1, the metal powder in the powder box 2 is laid on the powder base plate or powder layer, and the powder box 2 slides to the bottom position of the storage box 41. At this time, the bottom discharge port of the storage box 41 is opened, and the metal powder in the storage box 41 is discharged. The powder box 2 is stored inside the material storage, which plays a role in feeding the inside of the powder box 2; when the metal powder inside the material storage box 41 is discharged into the inside of the powder box 2, the guide box 5 is fixed at the discharge port of the material storage box 41, and the bottom end of the guide box 5 is blocked first. A large amount of metal powder is stored in the material storage box 41. When the No. 2 electric slider drives the powder box 2 to slide to the bottom end of the guide box 5, the bottom end of the guide box 5 is opened, and the metal powder in the material storage box 41 is guided along the small opening at the bottom end of the guide box 5 to fall into the large opening at the top end of the powder box 2, thereby achieving the role of guiding and feeding the inside of the powder box 2; When the bottom end of the guide box 5 is controlled and blocked, the fixing frame 6 is fixed to the side of the support frame 4 away from the powder spreading box 2, and the right-angle plate 62 slides on the fixing frame 6 through multiple sliding rods 61. As the No. 2 electric slider drives the powder spreading box 2 to slide and squeeze the right-angle plate 62, the right-angle plate 62 slides to open the bottom end of the guide box 5, and multiple elastic members 63 are squeezed and contracted by the right-angle plate 62. The metal powder inside the storage box 41 is guided along the guide box 5 and falls into the inside of the powder spreading box 2. When the No. 2 electric slider drives the powder spreading box 2 to slide away from the right-angle plate 62, the multiple elastic members 63 elastically reset and squeeze the right-angle plate 62 to cooperate with the multiple sliding rods 61 to slide, and the right-angle plate 62 slides to block the bottom end of the guide box 5, thereby controlling and blocking the bottom end of the guide box 5; When the product is manufactured by additive manufacturing, the excess metal powder on the product is shaken off, and the excess metal powder falls into the two recovery slots 7 on both sides through the inclined slot for temporary storage. A large amount of metal powder is temporarily stored at the bottom of the inverted trapezoid of the recovery slot 7, which is convenient for the subsequent recycling of the metal powder and plays a role in recycling and storing the used metal powder; when the product is manufactured by additive manufacturing, the product is removed from the powder-laying bottom plate, and a large amount of unsolidified metal powder remains on the support plate 13. The baffle plate 16 is driven away from the support plate 13 by the No. 1 electric slider, and the output end of the electric cylinder 81 drives the long strip plate 82 to rise, and the long strip plate 82 moves the flexible material The middle part of the rubber plate 8 is lifted up, so that slopes appear on both sides of the rubber plate 8. A large amount of metal powder falls along the slope of the rubber plate 8 into the inclined groove of the device base 1, and then the metal powder falls into the recovery groove 7 for collection, which plays a role in recycling the remaining metal powder; when the remaining metal powder after additive manufacturing is stored in the recovery groove 7, the metal powder at the bottom of the recovery groove 7 is extracted by the delivery pump 9 in cooperation with the extraction pipe 91. The delivery pump 9 is a pump that can transport powder. After the metal powder is extracted, it is sent to the inside of the storage box 41 through the delivery pipe 92, thereby realizing the effect of recycling the metal powder.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An additive manufacturing powder spreading device, characterized in that: The invention comprises a device base (1); a hydraulic cylinder (11) is fixedly connected to the center of the device base (1); a support column (12) is fixedly connected to the output end of the hydraulic cylinder (11); a support plate (13) is fixedly connected to the top of the support column (12), and a plurality of No. 1 plug-in holes are provided on both sides of the support plate (13); a splicing plate (14) is provided on both sides of the support plate (13), and a plurality of No. 2 plug-in holes are provided on the side of the splicing plate (14) away from the support plate (13); a plurality of plug-in rods (15) are fixedly connected to the side of the splicing plate (14) close to the support plate (13), and the diameter of the plug-in rods (15) corresponds to the diameter of the No. 1 plug-in hole and the No. 2 plug-in hole; baffles (16) are slidably connected to both sides of the inner wall of the device base (1) close to the support plate (13) through No. 1 electric sliders; a matching component is provided at the top of the device base (1), and the matching component is used to match the support plate (13) for powder spreading.

2. The powder spreading device for additive manufacturing according to claim 1, characterized in that: The matching component comprises a powder spreading box (2) and a sealing plate (21); the powder spreading box (2) is slidably connected to the top of the device base (1) via a No. 2 electric slider; and the sealing plate (21) is slidably connected to the bottom inner wall of the powder spreading box (2) via a No. 3 electric slider.

3. The powder spreading device for additive manufacturing according to claim 2, characterized in that: Both sides of the powder spreading box (2) are fixedly connected to connecting plates (3); a scraper (31) is fixedly connected to the outer wall of the connecting plate (3) close to the bottom of the powder spreading box (2); and both sides of the connecting plate (3) are fixedly connected to side plates (32).

4. The additive manufacturing powder spreading device according to claim 2, characterized in that: A pair of symmetrically arranged support frames (4) are fixedly connected to the outer wall of the device base (1); and a material storage box (41) is fixedly connected to one end of the two support frames (4) away from the device base (1).

5. The additive manufacturing powder spreading device according to claim 4, characterized in that: A flow guide box (5) is fixedly connected to the bottom ends of the two material storage boxes (41); the flow guide box (5) is located at the bottom feed opening of the material storage box (41), and the bottom port diameter of the flow guide box (5) is smaller than the top port diameter of the powder spreading box (2).

6. The powder spreading device for additive manufacturing according to claim 4, characterized in that: The outer walls of the two support frames (4) are symmetrically fixed with a fixing frame (6); the inner wall of the fixing frame (6) is slidably connected with a plurality of sliding rods (61); the ends of the sliding rods (61) are fixedly connected with a right-angle plate (62), and the right-angle plate (62) is fixedly connected to the plurality of sliding rods (61); an elastic member (63) is sleeved on the sliding rod (61), and the elastic member (63) is located between the fixing frame (6) and the right-angle plate (62).

7. The additive manufacturing powder spreading device according to claim 4, characterized in that: Recovery grooves (7) are provided on both sides of the top of the device base (1); the bottom cross-section of the recovery groove (7) is in the shape of an inverted trapezoid; and an inclined groove is provided inside the device base (1) between the recovery groove (7) and the support plate (13).

8. The additive manufacturing powder spreading device according to claim 1, characterized in that: The top end of the support plate (13) is fixedly connected to a rubber plate (8), and the bottom ends of both sides of the rubber plate (8) are fixedly connected to the top ends of both sides of the support plate (13); the top end of the support column (12) is fixedly connected to an electric cylinder (81); the output end of the electric cylinder (81) is fixedly connected to a long strip plate (82), and the long strip plate (82) is located between the support plate (13) and the rubber plate (8).

9. The additive manufacturing powder spreading device according to claim 7, characterized in that: A delivery pump (9) is fixedly connected to the support frame (4); an extraction pipe (91) is fixedly connected to the outer wall of the delivery pump (9), and the extraction pipe (91) is connected to the bottom of the recovery tank (7); a delivery pipe (92) is fixedly connected to the top of the delivery pump (9), and the delivery pipe (92) passes through the support frame (4) and is connected to the interior of the material storage box (41).

10. The additive manufacturing powder spreading device according to claim 1, characterized in that: A plurality of the splicing plates (14) are provided; two splicing plates (14) are spliced ​​together via two plug-in rods (15).

Images