An additive manufacturing powder spreading device

Abstract

The present invention belongs to the technical field of additive manufacturing, and specifically is an additive manufacturing powder spreading device, comprising a device base; a hydraulic cylinder is fixedly connected to the center of the device base; a support column is fixedly connected to the output end of the hydraulic cylinder; a support plate is arranged and spliced ​​with a plurality of splicing plates according to different sizes of products, so as to adaptively splice powder spreading base plates of different sizes, replace the traditional fixed-size powder spreading base plates, reduce part of the powder spreading area, and thus improve the efficiency of powder spreading, and utilize metal powder loaded in a powder spreading box to slide with a No. 2 electric slider to spread the powder, and cooperate with a scraper to flatten the spread metal powder, so as to achieve uniform powder spreading during additive manufacturing, and utilize two material storage boxes fixed at both ends of the device base, and 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, so as to achieve the effect of loading the powder into the powder spreading box.

Description

Technical Field

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

[0002] Additive manufacturing is an advanced technology that uses a method of layer-by-layer accumulation of materials to manufacture solid parts. Additive manufacturing is also known as 3D printing. After layer-by-layer powder spreading, additive manufacturing uses laser sintering and curing to construct a three-dimensional object, so additive manufacturing is opposite to the production method of traditional subtractive manufacturing.

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

[0004] In the process of additive manufacturing, in the current powder spreading device for additive manufacturing, each time a three-dimensional model is printed, the powder spreading area needs to be filled layer by layer. The size of the powder spreading area by the powder spreading device is fixed. However, when additive manufacturing products of different sizes, the size of the powder spreading area remains unchanged, resulting in high powder consumption and easy influence on the powder spreading efficiency of additive manufacturing.

[0005] Therefore, 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 and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An additive manufacturing powder spreading device of the present invention includes a device base; a hydraulic cylinder is fixedly connected to the center inside of the device base; the output end of the hydraulic cylinder is fixedly connected to a support column; the top end of the support column is fixedly connected to a support plate, and a plurality of first insertion holes are opened on both sides of the support plate; splicing plates are arranged on both sides of the support plate, and a plurality of second insertion holes are opened on the side of the splicing plate away from the support plate; a plurality of insertion rods are fixedly connected to the side of the splicing plate close to the support plate, and the diameter of the insertion rods corresponds to the diameters of the first insertion holes and the second insertion holes; baffles are slidably connected to both sides of the inner wall of the device base close to the support plate through first electric sliders; a matching component is arranged on the top end of the device base, and the matching component is used to cooperate with the support plate for powder spreading.

[0008] Preferably, the matching component includes a powder spreading box and a sealing plate; the powder spreading box is slidably connected to the top end of the device base through a second electric slider; the sealing plate is slidably connected to the bottom inner wall of the powder spreading box through a third electric slider.

[0009] Preferably, connecting plates are fixedly connected to both sides of the powder spreading box; a scraper is fixedly connected to the outer wall of the connecting plate near the bottom side of the powder spreading box; 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; a storage box is fixedly connected to one end of the two support frames away from the device base.

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

[0012] Preferably, fixing frames are symmetrically and fixedly connected to the outer walls of the two support frames; a plurality of sliding rods are slidably connected to the inner walls of the fixing frames; a right-angled plate is fixedly connected to the end of the sliding rod, and the right-angled plate is fixedly connected to the plurality of sliding rods; an elastic member is sleeved on the sliding rod, and the elastic member is located between the fixing frame and the right-angled plate.

[0013] Preferably, recovery grooves are provided on both sides of the top end of the device base; the bottom cross-sectional shape of the recovery groove is trapezoidal in reverse; an inclined groove is provided inside the device base between the recovery groove and the support plate.

[0014] Preferably, a rubber plate is fixedly connected to the top end of the support plate, and the bottom ends on both sides of the rubber plate are fixedly connected to the top ends on both sides of the support plate; an electric cylinder is fixedly connected to the inside of the top end of the support column; the output end of the electric cylinder is fixedly connected to a long strip plate, and the long strip plate 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 groove; a delivery pipe is fixedly connected to the top end of the delivery pump, and the delivery pipe penetrates through the support frame and is connected to the inside of the storage box.

[0016] Preferably, a plurality of splicing plates are provided; the two splicing plates are spliced by two insertion rods.

[0017] The beneficial effects of the present invention are as follows:

[0018] 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.

[0019] 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

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the powder spreading box in the present invention;

[0023] Figure 3 It is a structural schematic diagram of the blocking plate in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the support plate in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the material storage box in the present invention;

[0026] Figure 6 It is a partial structural cross-sectional view of the powder spreading box in the present invention;

[0027] Figure 7 It is a structural schematic diagram of the sliding rod in the present invention.

[0028] In the figure: 1. Device base; 11. Hydraulic cylinder; 12. Support column; 13. Support plate; 14. Splicing plate; 15. Insertion rod; 16. Baffle; 2. Powder spreading box; 21. Sealing plate; 3. Connecting plate; 31. Scraper; 32. Side plate; 4. Support frame; 41. Storage box; 5. Flow guiding box; 6. Fixed frame; 61. Sliding rod; 62. Right-angle plate; 63. Elastic member; 7. Recovery groove; 8. Rubber plate; 81. Electric cylinder; 82. Long strip plate; 9. Delivery pump; 91. Extraction pipe; 92. Delivery pipe. Detailed implementation manners

[0029] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0030] As Figures 1 to 4 , Figure 6As shown in the figure, an additive manufacturing powder spreading device according to an embodiment of the present invention includes a device base 1; a hydraulic cylinder 11 is fixedly connected to the center inside of the device base 1; an output end of the hydraulic cylinder 11 is fixedly connected to a support column 12; a top end of the support column 12 is fixedly connected to a support plate 13, and a plurality of first insertion holes are formed on both sides of the support plate 13; splicing plates 14 are arranged on both sides of the support plate 13, and a plurality of second insertion holes are formed on a side of the splicing plate 14 away from the support plate 13; a plurality of insertion rods 15 are fixedly connected to a side of the splicing plate 14 close to the support plate 13, and a diameter of the insertion rod 15 corresponds to diameters of the first insertion hole and the second insertion 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 first electric sliders; a matching component is arranged at a top end of the device base 1, and the matching component is used for matching the support plate 13 to spread powder; when spreading powder in additive manufacturing, taking the device base 1 as a main framework of the powder spreading device, a laser device is arranged above the device base 1, and the laser device is used for laser melting or sintering and curing powder materials during layer-by-layer stacking. First, according to the size of the product to be printed, the two splicing plates 14 are respectively and oppositely inserted and fixed on both sides of the support plate 13 through a plurality of insertion rods 15, and the plurality of insertion rods 15 are respectively inserted into the plurality of first insertion holes. If the product to be printed is too large, another splicing plate 14 is continuously spliced on the other side of the splicing plate 14 already spliced on the support plate 13, and the plurality of insertion rods 15 installed on the other splicing plate 14 are respectively inserted into the second insertion holes of the previous splicing plate 14 until the support plate 13 and the plurality of splicing plates 14 are adapted to the size of the currently printed product. If the product to be printed is small, only the support plate 13 is used to receive the metal powder for powder spreading. After adjusting the width of the powder spreading bottom plate spliced by the support plate 13 and the plurality of splicing plates 14, the two baffles 16 are respectively slid through the first electric sliders and closely fit the outermost two splicing plates 14. After the matching component is filled with metal powder, the powder is evenly spread on the spliced powder spreading bottom plate. For each layer of powder spread, the laser device is used to sinter and cure the metal powder above the support plate 13 through a laser beam. After sintering, the output end of the hydraulic cylinder 11 drives the support plate 13 and the plurality of splicing plates 14 on the support column 12 to slide down a distance of one layer of powder, and powder spreading and curing are carried out in sequence until the product is manufactured. According to different sizes of the product, the powder spreading bottom plate of different sizes is adaptively spliced, replacing the traditional powder spreading bottom plate of a fixed size, reducing part of the powder spreading area, reducing the consumables for powder spreading, and thus improving the powder spreading efficiency.

[0031] The mating component includes a powder spreading box 2 and a plugging plate 21; the powder spreading box 2 is slidably connected to the top end of the device base 1 through a second electric slider; the plugging plate 21 is slidably connected to the inner bottom wall of the powder spreading box 2 through a third electric slider; when additive manufacturing powder spreading is carried out, metal powder is poured into the interior of the powder spreading box 2. As the second electric slider drives the powder spreading box 2 to slide close to the spliced powder spreading bottom plate, then the third electric slider drives the plugging plate 21 that originally plugged the bottom of the powder spreading box 2 to slide. After the plugging plate 21 slides, the bottom of the powder spreading box 2 is opened, so that the metal powder temporarily stored in the powder spreading box 2 falls onto the powder spreading bottom plate. The powder spreading box 2 reciprocally slides with the second electric slider, playing the role of additive manufacturing powder spreading.

[0032] Both sides of the powder spreading box 2 are fixedly connected with connecting plates 3; the outer wall of the connecting plate 3 is fixedly connected with a scraper 31 near one side of the bottom 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 for powder spreading with the second electric slider, 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 the two side plates 32 cooperate to block the metal powder scraped by the scraper 31, making the spread metal powder layer flatter and improving the effect of laser beam solidifying the metal powder.

[0033] As Figure 1 、 Figure 2 and Figure 5 As shown in the figure, a pair of symmetrically arranged support frames 4 are fixedly connected to the outer wall of the device base 1; the ends of the two support frames 4 far from the device base 1 are fixedly connected with material storage boxes 41; when loading metal powder into the interior of the powder spreading box 2, the two material storage boxes 41 are respectively fixed at both ends of the device base 1 by using the two support frames 4. A large amount of metal powder is stored in the two material storage boxes 41, and the feeding ports of the material storage boxes 41 are plugged. After the second electric slider drives the powder spreading 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 spreading box 2 is laid on the powder spreading bottom plate or the powder layer. The powder spreading box 2 slides to the bottom position of the material storage box 41. At this time, the bottom feeding port of the material storage box 41 is opened, and the metal powder in the material storage box 41 is fed into the interior of the powder spreading box 2 for storage, playing the role of loading the interior of the powder spreading box 2.

[0034] The bottoms of the two material storage boxes 41 are fixedly connected with a diversion box 5; the diversion box 5 is located at the bottom feeding port of the material storage box 41, and the bottom port diameter of the diversion box 5 is smaller than the top port diameter of the powder spreading box 2; when the metal powder in the material storage box 41 is fed into the interior of the powder spreading box 2, by using the diversion box 5 fixed at the feeding port of the material storage box 41 and plugging the bottom end of the diversion box 5 first, a large amount of metal powder is stored in the material storage box 41. When the second electric slider drives the powder spreading box 2 to slide to the bottom of the diversion box 5, the bottom end of the diversion box 5 is opened, and the metal powder in the material storage box 41 falls into the large mouth at the top of the powder spreading box 2 along the small opening at the bottom end of the diversion box 5, realizing the function of guiding and loading the interior of the powder spreading box 2.

[0035] As Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, fixed brackets 6 are symmetrically and fixedly connected to the outer walls of the two support brackets 4; a plurality of sliding rods 61 are slidably connected to the inner walls of the fixed brackets 6; right-angled plates 62 are fixedly connected to the ends of the sliding rods 61, and the right-angled plates 62 are fixedly connected to the plurality of sliding rods 61; elastic members 63 are sleeved on the sliding rods 61, and the elastic members 63 are located between the fixed brackets 6 and the right-angled plates 62; when controlling the sealing of the bottom end of the diversion box 5, with the fixed brackets 6 fixed on the side of the support bracket 4 away from the powder spreading box 2, the right-angled plates 62 slide on the fixed brackets 6 through the plurality of sliding rods 61. As the second electric slider drives the powder spreading box 2 to slide and squeeze the right-angled plates 62, the right-angled plates 62 slide to open the bottom end of the diversion box 5, and the plurality of elastic members 63 are squeezed and contracted by the right-angled plates 62. The metal powder inside the storage box 41 falls into the powder spreading box 2 along the diversion of the diversion box 5. When the second electric slider drives the powder spreading box 2 to slide away from the right-angled plates 62, the plurality of elastic members 63 are elastically reset to squeeze the right-angled plates 62 and cooperate with the plurality of sliding rods 61 to slide, and the right-angled plates 62 slide to seal the bottom end of the diversion box 5, playing a role in controlling the sealing of the bottom end of the diversion box 5.

[0036] As Figures 1 to 3 As shown, recovery grooves 7 are provided on both sides of the top end of the device base 1; the bottom cross-sectional shape of the recovery grooves 7 is an inverted trapezoid; an inclined groove is provided inside the device base 1 between the recovery grooves 7 and the support plate 13; when manufacturing a product 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. A large amount of metal powder is temporarily stored at the inverted trapezoidal bottom of the recovery grooves 7, facilitating subsequent recovery and treatment of the metal powder, and playing a role in recycling and storing the used metal powder.

[0037] As Figures 1 to 4 As shown, a rubber plate 8 is fixedly connected to the top end of the support plate 13, 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; an electric cylinder 81 is fixedly connected to the top end inside the support column 12; 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; after manufacturing a product by additive manufacturing, when the product is taken off from the powder spreading bottom plate, a large amount of uncured metal powder remains on the support plate 13. The first electric slider is used to drive the baffle 16 away from the support plate 13, and the output end of the electric cylinder 81 drives the long strip plate 82 to rise. The long strip plate 82 jacks up the middle of the flexible rubber plate 8, causing slopes to appear on both sides of the rubber plate 8. A large amount of metal powder falls along the slopes of the rubber plate 8 into the inclined groove of the device base 1, and then the metal powder falls into the recovery grooves 7 for collection, playing a role in recycling the remaining metal powder.

[0038] AsFigures 1 to 3 , Figure 5 As shown, a transfer pump 9 is fixedly connected to the support frame 4; an extraction pipe 91 is fixedly connected to the outer wall of the transfer pump 9, and the extraction pipe 91 is connected to the bottom of the recovery tank 7; the top end of the transfer pump 9 is fixedly connected to a transfer pipe 92, and the transfer pipe 92 penetrates through the support frame 4 and is connected to the inside of the storage tank 41; when the remaining metal powder after additive manufacturing is stored in the recovery tank 7, the transfer pump 9 is used in cooperation with the extraction pipe 91 to extract the metal powder at the bottom of the recovery tank 7. The transfer pump 9 is a pump capable of transporting powder. After extracting the metal powder, it is sent to the inside of the storage tank 41 through the transfer pipe 92, thereby achieving the effect of recycling the metal powder.

[0039] As Figures 1 to 4 shown, a plurality of splicing plates 14 are provided; two of the splicing plates 14 are spliced by two insertion rods 15; when additive manufacturing of a large-volume product is carried out, the support plate 13 serves as the main support for the powder spreading bottom plate. A plurality of splicing plates 14 are spliced on both sides of the support plate 13 until the powder spreading bottom plate spliced by the plurality of splicing plates 14 and the support plate 13 can support the large-volume product. A plurality of insertion rods 15 are installed on one of the two splicing plates 14, and the plurality of insertion rods 15 are inserted into the second insertion holes of the other splicing plate 14, thereby realizing the function of splicing and building the powder spreading bottom plate, which is applicable to additive manufacturing of products of different sizes.

[0040] 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;

[0041] When loading metal powder into the powder spreading box 2, two support frames 4 are used to fix two storage boxes 41 at both ends 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 second electric slider drives the powder spreading box 2 to slide from one side of the device base 1 to the other side, the metal powder in the powder spreading box 2 is laid on the powder spreading bottom plate or the powder layer. The powder spreading 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 interior of the powder spreading box 2 for storage, playing a role in loading the interior of the powder spreading box 2; when the metal powder in the storage box 41 is discharged into the interior of the powder spreading box 2, the diversion box 5 is fixed at the discharge port of the storage box 41, and the bottom end of the diversion box 5 is blocked first. A large amount of metal powder is stored in the storage box 41. When the second electric slider drives the powder spreading box 2 to slide to the bottom of the diversion box 5, the bottom end of the diversion box 5 is opened, and the metal powder in the storage box 41 falls into the large opening at the top of the powder spreading box 2 along the small opening at the bottom end of the diversion box 5, realizing the function of guiding and loading the interior of the powder spreading box 2;

[0042] When controlling the blockage of the bottom end of the diversion box 5, the fixing frame 6 is fixed on the side of the support frame 4 away from the powder spreading box 2. The right-angle plate 62 slides on the fixing frame 6 through a plurality of sliding rods 61. As the second 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 diversion box 5, and a plurality of elastic members 63 are squeezed and contracted by the right-angle plate 62. The metal powder in the storage box 41 falls into the interior of the powder spreading box 2 along the diversion of the diversion box 5. When the second electric slider drives the powder spreading box 2 to slide away from the right-angle plate 62, the plurality of elastic members 63 are elastically reset to squeeze the right-angle plate 62 and cooperate with the plurality of sliding rods 61 to slide, and the right-angle plate 62 slides to block the bottom end of the diversion box 5, playing a role in controlling the blockage of the bottom end of the diversion box 5;

[0043] When the product is manufactured by additive manufacturing, the excess metal powder on the product is shaken off. The excess metal powder falls into the two recovery tanks 7 on both sides through the chute and is temporarily stored. A large amount of metal powder is temporarily stored at the trapezoidal bottom of the recovery tank 7, which is convenient for subsequent recovery and treatment of the metal powder, and plays a role in recycling and storing the used metal powder. After the product is manufactured by additive manufacturing, the product is taken off the powder spreading bottom plate, and a large amount of uncured metal powder remains on the support plate 13. The first electric slider is used to drive the baffle 16 away from the support plate 13, and the output end of the electric cylinder 81 drives the long strip plate 82 to rise. The long strip plate 82 jacks up the middle of the rubber plate 8 made of flexible material, causing slopes on both sides of the rubber plate 8. A large amount of metal powder falls along the slopes of the rubber plate 8 into the chute of the device base 1, and then the metal powder falls into the recovery tank 7 for collection, playing a role in recycling the remaining metal powder. When the remaining metal powder after additive manufacturing is stored in the recovery tank 7, the transfer pump 9 is used in cooperation with the extraction pipe 91 to extract the metal powder at the bottom of the recovery tank 7. The transfer pump 9 is a pump capable of transporting powder. After the metal powder is extracted, it is sent to the inside of the storage box 41 through the transfer pipe 92, thus realizing the effect of recycling the metal powder.

[0044] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An additive manufacturing powder spreading device, characterized in that: It comprises a device base; a hydraulic cylinder is fixedly connected to the center 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; baffles are slidably connected to both sides of the inner wall of the device base close to the support plate 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; The matching assembly includes a powder spreading box and a blocking plate; the powder spreading box is slidably connected to the top of the device base through a No. 2 electric slider; the blocking plate is slidably connected to the bottom inner wall of the powder spreading box through a No. 3 electric slider; A pair of symmetrically arranged support frames are fixedly connected to the outer wall of the device base; a material storage box is fixedly connected to one end of the two support frames away from the device base; The bottom ends of the two material storage boxes are fixedly connected with a flow guide box; the flow guide box is located at the bottom feeding port of the material storage box, and the bottom port diameter of the flow guide box is smaller than the top port diameter of the powder spreading box; 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.

2. The powder spreading device for additive manufacturing according to claim 1, characterized in that: Both sides of the powder spreading box are fixedly connected with connecting plates; 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 both sides of the connecting plate are fixedly connected with side plates.

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

4. The additive manufacturing powder spreading device according to claim 1, characterized in that: The top of the support plate is fixedly connected to a rubber plate, and the bottom ends of the rubber plate are fixedly connected to the tops of the support plate; the top of the support column is fixedly connected to an electric cylinder; the output end of the electric cylinder is fixedly connected to a long strip plate, and the long strip plate is located between the support plate and the rubber plate.

5. The additive manufacturing powder spreading device according to claim 3, characterized in that: 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.

6. The additive manufacturing powder spreading device according to claim 1, characterized in that: A plurality of splicing plates are provided; two splicing plates are spliced ​​together by two plug-in rods.

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