CN114226762B - Single-scraper bidirectional powder paving device for additive manufacturing equipment - Google Patents
Single-scraper bidirectional powder paving device for additive manufacturing equipment Download PDFInfo
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- CN114226762B CN114226762B CN202111598904.5A CN202111598904A CN114226762B CN 114226762 B CN114226762 B CN 114226762B CN 202111598904 A CN202111598904 A CN 202111598904A CN 114226762 B CN114226762 B CN 114226762B
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- 239000000843 powder Substances 0.000 title claims abstract description 223
- 239000000654 additive Substances 0.000 title claims abstract description 16
- 230000000996 additive effect Effects 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 230000002457 bidirectional effect Effects 0.000 title abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 95
- 230000007480 spreading Effects 0.000 claims abstract description 33
- 238000003892 spreading Methods 0.000 claims abstract description 33
- 230000007704 transition Effects 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims 1
- 230000002146 bilateral effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
- B22F12/67—Blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/31—Calibration of process steps or apparatus settings, e.g. before or during manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a single-scraper bidirectional powder paving device for additive manufacturing equipment, which comprises a powder falling transition connecting piece, a scraper powder equally dividing mechanism, a scraper frame connecting plate, a powder pocket plate, a side limiting plate, a scraper frame, a scraper leveling mechanism and a scraper reversing mechanism, wherein the scraper frame connecting plate is arranged on the side limiting plate; the powder falling transition connecting piece is used for transiting powder into the scraper powder equally dividing mechanism; the scraper powder equally dividing mechanism is used for equally dividing the powder falling into two equal parts and flowing into powder storage grooves at two sides of the scraper frame connecting plate; a powder bag plate is arranged below the powder storage groove, two ends and the lower part of the powder bag plate are respectively contacted with the side limiting plate through rolling pins, and a gap is reserved between the powder bag plate and the scraper frame connecting plate; the scraper leveling mechanism is positioned above the scraper frame connecting plate and is connected with the scraper frame through a connecting shaft; the scraper reversing mechanism is positioned at the front reversing position and the rear reversing position of the powder paving device to realize the reciprocating motion of the powder paving device. The invention has the leveling function, avoids the problem of relative error generated by bilateral scraper adjustment, and ensures that the powder spreading amount is the same each time.
Description
Technical Field
The invention belongs to the technical field of laser selective melting equipment, and particularly relates to a single-scraper bidirectional powder paving device for additive manufacturing equipment.
Background
The laser selective melting (also called additive manufacturing or metal 3D printing) technology is a novel processing method which appears in recent years, raw materials adopted by the technology are all powder of tens to hundreds of micrometers, in the forming process, the powder is uniformly and flatly spread on a forming substrate through a powder supply mechanism and a powder spreading mechanism, then the powder in a surface specific geometric shape area is melted by using energy sources such as laser and the like, metallurgical bonding is generated, and finally parts grow layer by layer, so that the three-dimensional forming process is realized.
The equipment generally comprises a forming cavity, a forming bin, a powder feeding bin, a powder spreading device, an optical system device and other mechanisms. More advanced equipment, especially large-format laser selective melting equipment, is usually a bidirectional powder paving device for improving powder paving efficiency. At present, the mainstream adopts two scrapers to spread powder device in the market, but two scraper structures must bring both sides scraper height to be difficult to adjust same planar technical problem that takes shape, and also can't guarantee that two scrapers can be completely horizontal unanimous to lead to from left to right scrape the powder and from right to left scrape the difference in height of powder, cause the homogeneity of laid powder thickness inconsistent, finally lead to forming part precision to receive great influence, cause scraper and part to take place even that the condition is serious to scrape and rub, lead to forming failure.
In the actual operation process of the double-scraper powder spreading structure, the clearance between the scrapers on the two sides and the standard working plane is measured by repeatedly using the feeler gauge, and the four jackscrews on the scraper leveling frame are adjusted, so that the process is complicated, the scrapers on the two sides are easily subjected to relative error during simultaneous leveling, the purpose of one-time well adjustment is not easy to realize, and the leveling time is long.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a single-scraper bidirectional powder spreading device for additive manufacturing equipment, which is provided with only one scraper and has a leveling function, so that the problem of relative error generated by bilateral scraper adjustment is avoided, and the same powder spreading amount is ensured each time.
The invention is realized in such a way that a single scraper two-way powder paving device for additive manufacturing equipment comprises a powder falling transition connecting piece, a scraper powder equally dividing mechanism, a scraper frame connecting plate, a powder pocket plate, a side limiting plate, a scraper frame, a scraper leveling mechanism and a scraper reversing mechanism;
the powder falling transition connecting piece is positioned above the powder spreading device main body and is used for stably transiting the metal powder provided by the powder supply mechanism into the scraper powder equally dividing mechanism positioned below the powder supply mechanism; the scraper powder equally dividing mechanism is used for equally dividing the powder falling into two equal parts and flowing into powder storage grooves on two sides of a scraper frame connecting plate below the scraper powder equally dividing mechanism through gravity; the two ends of the scraper frame connecting plate are respectively provided with a side limiting plate, a powder pocket plate is arranged below the powder storage groove, and the two ends and the lower part of the powder pocket plate are respectively contacted with the side limiting plates through rolling pins and a gap is reserved between the powder pocket plate and the scraper frame connecting plate; the middle of the powder pocket plate is open, two sides of the powder pocket plate are respectively provided with a powder falling hole, and the positions of the powder falling holes on the corresponding sides correspond to the positions of the powder storage grooves when the powder pocket plate moves to the limiting position;
the scraper leveling mechanism is positioned above the scraper frame connecting plate, is connected with the scraper frame penetrating through the middle opening of the powder pocket plate through a connecting shaft, and is used for adjusting the scraper frame containing the scraper up and down to be completely parallel to the substrate; the scraper frame is used for installing a scraper;
the scraper reversing mechanisms are respectively positioned at the front reversing position and the rear reversing position of the powder paving device, and can collide with the powder pocket plate to realize the reciprocating motion of the powder paving device.
In the above technical scheme, preferably, the scraper leveling mechanism is mounted on the scraper rest connecting plate, the scraper leveling mechanism is composed of a side connecting plate, a connecting shaft, a mounting flange, a precise adjusting bolt and a compression spring, a groove is formed in the side connecting plate, and the connecting shaft penetrates through the compression spring to be placed in the groove of the side connecting plate and is fixedly connected with the scraper rest below; the mounting flange is fixed on the side connecting plate, the precise adjusting bolt is in threaded connection with the mounting flange, the upper end face of the connecting shaft is completely attached to the lower end face of the precise adjusting bolt through the elasticity of the compression spring, jackscrew holes I are formed in two sides of the side connecting plate, and jackscrews I penetrate through the jackscrew holes I to fix the scraper rest.
In the above technical scheme, preferably, the scraper frame is wholly in a U-shaped structure, bosses are arranged at two ends of the scraper frame, through holes are formed in the bosses, the scraper frame penetrates through the through holes through connecting bolts to be connected with a connecting shaft of the scraper leveling mechanism, and internal thread counter bores are formed in the connecting shaft.
In the above technical scheme, preferably, the powder falling transition connecting piece is connected with the scraper powder equipartition mechanism through a bolt, a plurality of second jackscrews are arranged on the powder falling transition connecting piece, and the jackscrews Kong Erna are in threaded connection with the second jackscrews for adjusting the height of the powder falling transition connecting piece.
In the above technical scheme, preferably, the scraper powder equipartition mechanism is installed on the scraper frame connecting plate, the scraper powder equipartition mechanism comprises two powder guide plates with the same structure, and two powder guide plates are combined in a cross stacking mode, so that the areas of powder falling into two sides of the powder spreading device are the same.
In the above technical scheme, preferably, the powder pocket plate performs travel limit through a limit protrusion located at the bottom of the scraper frame connecting plate.
In the above technical solution, preferably, the height of the side limiting plate is adjustable.
In the above technical scheme, preferably, each scraper reversing mechanism is composed of a single scraper buffer plate, a reversing ejector rod, a reversing spring and a fixing nut, wherein a through hole is formed in the single scraper buffer plate, the single scraper buffer plate is arranged on a bottom plate of the forming chamber, and the reversing ejector rod sequentially penetrates through the reversing spring and the through hole of the single scraper buffer plate to be connected with the fixing nut.
In the above technical scheme, preferably, two ends of the powder spreading device are mounted on a horizontal movement mechanism of the 3D printer through a scraper frame connecting mechanism.
In the above technical scheme, it is further preferable that the scraper rack connecting mechanism is composed of a single scraper rack and a scraper rack connecting block, the single scraper rack is connected with a side connecting plate of the scraper leveling mechanism, and the scraper rack connecting block is connected with a horizontal movement mechanism of the 3D printer.
The invention has the advantages and positive effects that:
1. the single-scraper bidirectional powder spreading device perfectly avoids all the defects of double-scraper bidirectional powder spreading, such as: the front scraper and the rear scraper are inconsistent in height, the two scrapers are inconsistent, the scrapers are difficult to adjust, and the inconsistent thickness of the part layers easily causes the scrapping of the part.
2. The scraper disclosed by the invention is convenient to install and convenient to adjust, the installation and adjustment can be basically completed within ten minutes, the labor cost is greatly reduced, the scraper is convenient and fast if the scraper needs to be replaced in the middle, the reference surface is convenient to adjust singly, and the phenomenon that leveling cannot be performed is avoided.
3. The single-scraper bidirectional powder spreading device provided by the invention has the advantages that the scraper powder equally dividing mechanism ensures that the powder amount of each powder spreading is the same, the reversing mechanism adopts simple pure mechanical driving without an additional driving device, the structure is reliable, the service life is long, and the cost is low.
Drawings
FIG. 1 is a schematic structural view of a single-scraper bidirectional powder spreading device provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of an arrangement structure of a single-scraper bidirectional powder spreading device provided by an embodiment of the invention;
FIG. 3 is a cross-sectional view of a single-blade bi-directional powder paving device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bidirectional powder spreading device with a single scraper and a powder feeding mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic view of a structure of a powder pocket plate and a side limiting plate according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a doctor blade leveling mechanism provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a scraper reversing mechanism according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a scraper reversing mechanism colliding with a powder collecting plate according to an embodiment of the present invention.
In the figure: 1. a scraper frame connecting mechanism; 1-1, a scraper frame connecting block; 1-2, a single scraper hanging rack; 2. a powder falling transition connecting piece; 2-1, a jackscrew hole II; 3. a scraper powder equally dividing mechanism; 4. a scraper rack; 5. a scraper leveling mechanism; 5-1, precisely adjusting the bolts; 5-2, mounting flanges; 5-3, a side connecting plate; 5-4, compressing a spring; 5-5, connecting shaft; 5-6, jackscrew hole I; 6. a scraper frame connecting plate; 6-1, a powder storage tank; 6-2, limiting protrusions; 7. a powder pocket plate; 7-1, powder falling holes; 7-2, rolling pins; 8. a side limiting plate; 9. a scraper reversing mechanism; 9-1, reversing ejector rods; 9-2, reversing springs; 9-3, a single scraper buffer plate; 9-4, fixing the nut; 10. a powder supply mechanism; 11. a forming chamber floor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the examples and the accompanying drawings. It should be understood that the detailed description is intended to illustrate the invention, and is not intended to limit the invention.
Examples
Referring to fig. 1 to 8, an embodiment of the present invention provides a single-scraper bidirectional powder paving device for additive manufacturing equipment, which includes a powder falling transition piece 2, a scraper powder equally dividing mechanism 3, a scraper frame connecting plate 6, a powder pocket plate 7, a side limiting plate 8, a scraper frame 4, a scraper leveling mechanism 5 and a scraper reversing mechanism 9.
The powder falling transition connecting piece 2 is positioned above the main body of the powder paving device and is used for stably transiting the metal powder provided by the powder supply mechanism 10 into the scraper powder equally dividing mechanism 3 positioned below the powder supply mechanism. The powder falling transition connecting piece 2 is connected with the scraper powder equally dividing mechanism 3 through bolts, a plurality of top thread holes 2-1 are formed in the powder falling transition connecting piece 2, the top threads 2-1 are connected with top threads in the top thread holes 2-1, the purpose of the powder falling transition connecting piece is to adjust the height of the powder falling transition connecting piece 2, the gap between the powder falling transition connecting piece and the powder supplying mechanism 10 is adjusted, when the powder spreading device moves below the powder supplying mechanism 10, the powder falling transition connecting piece 2 is adjusted in height through a feeler gauge, the gap between the powder falling transition connecting piece 2 and the two sides of the powder falling transition connecting piece 2 is even, powder cannot spill out, and a sealing ring is arranged between the two sides of the powder falling transition connecting piece 2 and the scraper powder equally dividing mechanism 3.
The scraper powder equally dividing mechanism 3 is used for equally dividing the powder falling into two equal parts and flowing into the powder storage grooves 6-1 on two sides of the scraper frame connecting plate 6 below the scraper powder equally dividing mechanism through gravity. The scraper powder equipartition mechanism 3 is installed on scraper frame connecting plate 6, scraper powder equipartition mechanism 3 comprises two powder guide plates that the structure is the same, two the powder guide plates adopts alternately to pile up the form combination, makes shop powder device both sides powder identical in area that falls into, and when powder flows to scraper powder equipartition mechanism 3 through gravity, the powder guide plate can be with the powder respectively leading into in the powder storage tank 6-1 of both sides, because both sides lead powder area the same so the powder volume of both sides is the same.
The two ends of the scraper frame connecting plate 6 are respectively provided with a side limiting plate 8, a powder pocket plate 7 is arranged below the powder storage groove 6-1, two ends and the lower side of the powder pocket plate 7 are respectively contacted with the side limiting plates 8 through rolling pins 7-2, a gap is reserved between the powder pocket plate and the scraper frame connecting plate 6, the middle of the powder pocket plate 7 is opened, two sides of the powder pocket plate 7 are respectively provided with a powder falling hole 7-1, the powder pocket plate 7 is movable, and the powder pocket plate 7 is limited in stroke through limiting protrusions 6-2 positioned at the bottom of the scraper frame connecting plate 6, and the positions of the powder falling holes 7-1 on the corresponding sides correspond to the positions of the powder storage groove 6-1 when the powder pocket plate 7 moves to the limiting positions. In the reciprocating motion process of the powder spreading device, when the powder spreading device moves to the front-back reversing position each time, the powder pocket plate 7 collides with the scraper reversing mechanism 9, so that the powder pocket plate 7 reciprocates at two limiting positions; when the powder pocket plate 7 moves from one side limiting position to the other side limiting position, powder limited in the powder storage groove 6-1 falls onto a powder bed through the powder falling hole 7-1 so as to realize powder falling of the powder spreading device; after the powder laying device finishes powder falling, the powder laying action is carried out through a scraper which is adjusted in advance.
The side limiting plates 8 can be adjusted in height, so that the height of the powder pocket plate 7 is adjusted, the lower part of the scraper frame connecting plate 6 is in clearance fit with the powder pocket plate 7, the clearance is adjusted through the side limiting plates 8, different heights of different powders are guaranteed, and the phenomenon of blocking does not occur.
The scraper leveling mechanism 5 is located above the scraper frame connecting plate 6 and connected with the scraper frame 4 penetrating through the middle opening of the powder pocket plate 7 through a connecting shaft, and is used for adjusting the scraper frame 4 containing the scraper up and down to be completely parallel to the substrate. The scraper leveling mechanism 5 is arranged on the scraper rest connecting plate 6, the scraper leveling mechanism 5 consists of a side connecting plate 5-3, a connecting shaft 5-5, a mounting flange 5-2, a precise adjusting bolt 5-1 and a compression spring 5-4, a groove is formed in the side connecting plate 5-3, and the connecting shaft 5-5 penetrates through the compression spring 5-4 to be arranged in the groove of the side connecting plate 5-3 and is fixedly connected with the scraper rest 4 below; the mounting flange 5-2 is fixed on the side connecting plate 5-3, the precise adjusting bolt 5-1 is in threaded connection with the mounting flange 5-2, the upper end face of the connecting shaft 5-5 is completely attached to the lower end face of the precise adjusting bolt 5-1 through the elasticity of the compression spring 5-4, the top thread holes I5-6 are formed in two sides of the side connecting plate 5-3, and the top thread I passes through the top thread holes I5-6 to fix the scraper rest 4. When the height of the scraper is required to be adjusted, the height of the scraper can be adjusted only by adjusting the height of the precise adjusting bolt 5-1, and the scraper frame 4 is fixed through jackscrew holes 5-6 on two sides of the side connecting plate 5-3 after the adjustment is finished.
The scraper frame 4 is used for installing scrapers, and the types of the installed scrapers comprise hairbrush scrapers, rubber scrapers, steel scrapers, ceramic scrapers and the like. The scraper frame 4 is of a U-shaped structure as a whole, bosses are arranged at two ends of the scraper frame, through holes are formed in the bosses, the scraper frame 4 passes through the through holes through connecting bolts and is connected with a connecting shaft 5-5 of the scraper leveling mechanism 5, an internal thread counter bore is formed in the connecting shaft 5-5, when the connecting shaft 5-5 of the scraper leveling mechanism 5 is adjusted, the scraper frame 4 moves along with the connecting shaft 5-5, so that the scraper and a substrate are adjusted to be completely parallel, and the scraper frame 4 is convenient to detach.
The scraper reversing mechanisms 9 are respectively positioned at the front reversing position and the rear reversing position of the powder paving device, and can collide with the powder pocket plate 7 to realize the reciprocating motion of the powder paving device. The scraper reversing mechanism 9 consists of a single scraper buffer plate 9-3, a reversing ejector rod 9-1, a reversing spring 9-2 and a fixing nut 9-4, wherein a through hole is formed in the single scraper buffer plate 9-3, the single scraper buffer plate 9-3 is arranged on a bottom plate 11 of a forming chamber, and the reversing ejector rod 9-1 sequentially penetrates through the reversing spring 9-2 and the through hole of the single scraper buffer plate 9-3 to be connected with the fixing nut 9-4. Four scraper reversing mechanisms 9 are provided, and two groups of reversing positions are provided before and after powder spreading, so that uniform stress of reversing in the powder spreading process is realized, and the reliability and stability of reversing are ensured.
The two ends of the powder paving device are arranged on a horizontal movement mechanism of the 3D printer through a scraper frame connecting mechanism 1, so that the powder paving device can reciprocate along with the horizontal movement mechanism to realize the printing and powder paving actions. Specifically, the scraper frame connecting mechanism 1 comprises a single scraper frame 1-2 and a scraper frame connecting block 1-1, the single scraper frame 1-2 is connected with a side connecting plate 5-3 of the scraper leveling mechanism 5, the scraper frame connecting block 1-1 is connected with a horizontal movement mechanism of the 3D printer, and a powder spreading device main body integrally falls on the scraper frame connecting block 1-1 through the single scraper frame 1-2 to realize fixed connection with the horizontal movement mechanism.
According to the single-scraper bidirectional powder spreading device, the scraper is convenient to install and adjust, the installation and adjustment can be basically completed within ten minutes, the labor cost is greatly reduced, convenience and quickness are realized if the scraper needs to be replaced in the middle, the reference surface is convenient to adjust singly, and the phenomenon that leveling cannot be performed is avoided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present invention.
Claims (8)
1. A two-way shop's powder device of single scraper for additive manufacturing equipment, its characterized in that: the device comprises a powder falling transition connecting piece, a scraper powder equipartition mechanism, a scraper frame connecting plate, a powder pocket plate, a side limiting plate, a scraper rest, a scraper leveling mechanism and a scraper reversing mechanism;
the powder falling transition connecting piece is positioned above the powder spreading device main body and is used for stably transiting the metal powder provided by the powder supply mechanism into the scraper powder equally dividing mechanism positioned below the powder supply mechanism; the scraper powder equally dividing mechanism is used for equally dividing the powder falling into two equal parts and flowing into powder storage grooves on two sides of a scraper frame connecting plate below the scraper powder equally dividing mechanism through gravity; the two ends of the scraper frame connecting plate are respectively provided with a side limiting plate, a powder pocket plate is arranged below the powder storage groove, and the two ends and the lower part of the powder pocket plate are respectively contacted with the side limiting plates through rolling pins and a gap is reserved between the powder pocket plate and the scraper frame connecting plate; the middle of the powder pocket plate is open, two sides of the powder pocket plate are respectively provided with a powder falling hole, and the positions of the powder falling holes on the corresponding sides correspond to the positions of the powder storage grooves when the powder pocket plate moves to the limiting position;
the scraper leveling mechanism is positioned above the scraper frame connecting plate, is connected with the scraper frame penetrating through the middle opening of the powder pocket plate through a connecting shaft, and is used for adjusting the scraper frame containing the scraper up and down to be completely parallel to the substrate; the scraper frame is used for installing a scraper;
the scraper reversing mechanisms are respectively positioned at the front reversing position and the rear reversing position of the powder paving device, and can collide with the powder pocket plate to realize the reciprocating motion of the powder paving device;
the scraper leveling mechanism is arranged on the scraper rest connecting plate and consists of a side connecting plate, a connecting shaft, a mounting flange, a precise adjusting bolt and a compression spring, wherein a groove is formed in the side connecting plate, and the connecting shaft penetrates through the compression spring, is arranged in the groove of the side connecting plate and is fixedly connected with the scraper rest below; the mounting flange is fixed on the side surface connecting plate, the precise adjusting bolt is in threaded connection with the mounting flange, the upper end surface of the connecting shaft is completely attached to the lower end surface of the precise adjusting bolt through the elasticity of the compression spring, jackscrew holes I are formed in two sides of the side surface connecting plate, and the jackscrews I penetrate through the jackscrew holes I to fix the scraper rest;
each scraper reversing mechanism consists of a single scraper buffer plate, a reversing ejector rod, a reversing spring and a fixing nut, wherein a through hole is formed in the single scraper buffer plate, the single scraper buffer plate is arranged on a bottom plate of a forming chamber, and the reversing ejector rod sequentially penetrates through the reversing spring and the through hole of the single scraper buffer plate to be connected with the fixing nut.
2. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the scraper frame is integrally of a U-shaped structure, bosses are arranged at two ends of the scraper frame, through holes are formed in the bosses, the scraper frame penetrates through the through holes through connecting bolts to be connected with a connecting shaft of a scraper leveling mechanism, and internal thread counter bores are formed in the connecting shaft.
3. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the powder falling transition connecting piece is connected with the scraper powder equally dividing mechanism through bolts, a plurality of second jackscrews are arranged on the powder falling transition connecting piece, and the second jackscrews are used for adjusting the height of the powder falling transition connecting piece through Kong Erna threaded connection.
4. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the scraper powder equipartition mechanism is installed on scraping knife rest connecting plate, scraper powder equipartition mechanism comprises two powder guide plates that the structure is the same, two the powder guide plates adopts alternately to pile up the form combination, makes shop powder device both sides powder fall into the same area.
5. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the powder pocket plate is limited in stroke through a limiting protrusion located at the bottom of the scraper frame connecting plate.
6. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the height of the side limiting plate is adjustable.
7. The single doctor bi-directional powder spreading device for an additive manufacturing apparatus according to claim 1, wherein: the two ends of the powder spreading device are arranged on a horizontal movement mechanism of the 3D printer through scraper frame connecting mechanisms.
8. The single doctor bi-directional powder spreading apparatus for an additive manufacturing apparatus according to claim 7, wherein: the scraper frame connecting mechanism consists of a single scraper frame and a scraper frame connecting block, wherein the single scraper frame is connected with a side connecting plate of the scraper leveling mechanism, and the scraper frame connecting block is connected with a horizontal movement mechanism of the 3D printer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598904.5A CN114226762B (en) | 2021-12-24 | 2021-12-24 | Single-scraper bidirectional powder paving device for additive manufacturing equipment |
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| CN202111598904.5A CN114226762B (en) | 2021-12-24 | 2021-12-24 | Single-scraper bidirectional powder paving device for additive manufacturing equipment |
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| CN114226762A CN114226762A (en) | 2022-03-25 |
| CN114226762B true CN114226762B (en) | 2023-10-27 |
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