CN114226762A - Single-scraper bidirectional powder laying device for additive manufacturing equipment - Google Patents
Single-scraper bidirectional powder laying device for additive manufacturing equipment Download PDFInfo
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- CN114226762A CN114226762A CN202111598904.5A CN202111598904A CN114226762A CN 114226762 A CN114226762 A CN 114226762A CN 202111598904 A CN202111598904 A CN 202111598904A CN 114226762 A CN114226762 A CN 114226762A
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- 239000000843 powder Substances 0.000 title claims abstract description 228
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 24
- 239000000654 additive Substances 0.000 title claims abstract description 17
- 230000000996 additive effect Effects 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 98
- 230000007480 spreading Effects 0.000 claims abstract description 32
- 238000003892 spreading Methods 0.000 claims abstract description 32
- 230000007704 transition Effects 0.000 claims abstract description 23
- 238000009827 uniform distribution Methods 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000009434 installation Methods 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 2
- 238000007790 scraping Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000945 filler Substances 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
- 239000000758 substrate Substances 0.000 description 1
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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]
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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
- B22F10/30—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
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- 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 spreading device for additive manufacturing equipment, which comprises a powder falling transition connecting piece, a scraper powder uniform distribution mechanism, a scraper frame connecting plate, a powder containing 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 scraper frame; the powder falling transition connecting piece is used for transitioning powder to the scraper powder uniform distribution mechanism; the scraper powder uniform distribution mechanism is used for uniformly distributing the powder falling into the scraper powder uniform distribution mechanism into two equal parts and flowing the powder into the powder storage grooves on two sides of the scraper frame connecting plate; a powder containing plate is arranged below the powder storage tank, two ends and the lower part of the powder containing plate are respectively contacted with the side limiting plate through rolling needles, and a gap is reserved between the two ends 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 and rear reversing positions of the movement of the powder paving device, so that the powder paving device can reciprocate. The invention has the leveling function, avoids the problem of relative error caused by the adjustment of the double-side scraper and ensures that the powder laying amount is the same each time.
Description
Technical Field
The invention belongs to the technical field of selective laser melting equipment, and particularly relates to a single-scraper bidirectional powder spreading device for additive manufacturing equipment.
Background
The selective laser melting (also called additive manufacturing or metal 3D printing) technology is a new processing method appearing in recent years, the technology adopts raw materials of powder of dozens to hundreds of microns, in the forming process, the powder is evenly spread on a forming substrate through a powder supply mechanism and a powder spreading mechanism, then the powder in a specific geometric shape area on the surface is melted by utilizing energy sources such as laser and the like to generate metallurgical bonding, and finally, parts grow layer by layer to realize the process of three-dimensional forming.
The equipment generally comprises a forming cavity, a forming bin, a powder conveying bin, a powder spreading device, an optical system device and other mechanisms. In order to improve the powder laying efficiency, a bidirectional powder laying device is generally adopted in more advanced equipment, particularly large-format laser selective melting equipment. Mainstream adopts two scrapers to spread powder device in the existing market, however two scraper structures must bring the both sides scraper height and are difficult to adjust to the technical problem on same shaping plane, also can't guarantee two scrapers can the level unanimity completely moreover to lead to turning right from a left side and scraping the powder and turning left from the right side and highly different, cause the homogeneity of the powder thickness of spreading inconsistent, finally lead to the shaping part precision to receive great influence, what the condition is serious even causes the scraper and part to take place to cut and rub, lead to taking shape failure.
In the actual operation process of the double-scraper powder spreading structure, the filler gauge is required to be repeatedly used to measure the gap between the scrapers on the two sides and the standard working plane, and the four jackscrews on the scraper leveling frame are adjusted at the same time, so that the process is complicated, relative errors are easily caused by simultaneous leveling of the scrapers on the two sides, the purpose of one-time adjustment is not easy to realize, and the leveling time is long.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the single-scraper bidirectional powder spreading device for the additive manufacturing equipment, the powder spreading device only has one scraper and has a leveling function, the problem of relative error caused by adjustment of double-side scrapers is avoided, and the same powder spreading amount in each time is ensured.
The invention is realized in this way, a single scraper two-way powder spreading device for additive manufacturing equipment, which comprises a powder falling transition connecting piece, a scraper powder uniform distribution mechanism, a scraper frame connecting plate, a powder containing 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 used for stably transitioning the metal powder provided by the powder supply mechanism into the scraper powder uniform distribution mechanism positioned below the powder supply mechanism; the scraper powder dividing mechanism is used for dividing powder falling into the scraper powder dividing mechanism into two equal parts and enabling the powder to flow into the powder storage grooves on two sides of the scraper frame connecting plate below the scraper powder dividing mechanism through gravity; two ends of the scraper frame connecting plate are respectively provided with a side limiting plate, a powder containing plate is arranged below the powder storage tank, two ends and the lower part of the powder containing plate are respectively contacted with the side limiting plates through rolling needles, and a gap is reserved between the two ends and the scraper frame connecting plate; the middle of the powder containing plate is open, powder falling holes are respectively formed in two sides of the powder containing plate, and the positions of the powder falling holes on the corresponding sides correspond to the positions of the powder storage grooves when the powder containing plate moves to the limiting position;
the scraper leveling mechanism is positioned above the scraper frame connecting plate, is connected with a scraper frame penetrating through an opening in the middle 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 base plate; the scraper frame is used for mounting a scraper;
the scraper reversing mechanism is respectively positioned at the front and rear reversing positions 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 frame 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, the side connecting plate is provided with a groove, and the connecting shaft penetrates through the compression spring and is arranged in the groove of the side connecting plate and fixedly connected with the scraper frame below; mounting flange fixes on the side connecting plate, precision adjusting bolt threaded connection makes connecting axle up end laminate completely with precision adjusting bolt lower extreme terminal surface through compression spring elasticity on mounting flange, side connecting plate both sides are provided with jackscrew hole one, and jackscrew passes a fixed scraper frame in jackscrew hole one.
In the technical scheme, preferably, the scraper frame is integrally of a U-shaped structure, the bosses are arranged at two ends of the scraper frame, the 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 the connecting shaft is provided with the inner thread counter bore.
In the above technical scheme, preferably, the powder falling transition connecting piece and the scraper powder uniform distribution mechanism are connected through a bolt, a plurality of second jackscrew holes are formed in the powder falling transition connecting piece, and the second jackscrew holes are connected with second jackscrews used for adjusting the height of the powder falling transition connecting piece in an internal thread mode.
In the technical scheme, preferably, the scraper powder equipartition mechanism is installed on the scraper frame connecting plate, the scraper powder equipartition mechanism is formed by two powder guide plates with the same structure, and the two powder guide plates are combined in a cross stacking mode, so that the areas of powder falling into two sides of the powder paving device are the same.
In the technical scheme, preferably, the powder pocket plate is limited in stroke through the limiting protrusion positioned 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, a through hole is formed in the single scraper buffer plate, the single scraper buffer plate is installed on a forming chamber bottom plate, 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 laying device are mounted on a horizontal movement mechanism of the 3D printer through a scraper holder connecting mechanism.
In above-mentioned technical scheme, it is further preferred, scrape a knife rest coupling mechanism and constitute by single scraper stores pylon and a scraper frame connecting block, single scraper stores pylon with the side connecting plate of scraper levelling mechanism is connected, scrape a knife rest connecting block and be connected with the horizontal motion mechanism of 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 different in height, the two scrapers are not consistent, the scrapers are difficult to adjust, and the thickness of the part layer is different, so that the part is easily scrapped.
2. The scraper disclosed by the invention is convenient to install and adjust, the installation and adjustment can be basically completed within ten minutes, the labor cost is greatly reduced, the scraper is convenient and fast to replace in midway, the reference surface is single and convenient to adjust, and the phenomenon that the scraper cannot be leveled can not occur.
3. According to the single-scraper bidirectional powder paving device, the scraper powder equipartition mechanism ensures that the powder paving amount is the same each time, the reversing mechanism is driven by a simple pure machine without an additional driving device, and the device is reliable in structure, long in service life and low in cost.
Drawings
FIG. 1 is a schematic structural diagram 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 the embodiment of the invention;
FIG. 3 is a cross-sectional view of a single-scraper bidirectional powder spreading device provided by an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a single-scraper bidirectional powder spreading device and a powder supply mechanism provided by the embodiment of the invention;
FIG. 5 is a schematic view of a configuration of a powder pocket plate and a side limiting plate according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a blade leveling mechanism provided by an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a doctor blade reversing mechanism provided in an embodiment of the invention;
FIG. 8 is a schematic structural view of the scraper reversing mechanism provided by the embodiment of the invention colliding with a powder pocket plate.
In the figure: 1. a scraper frame connecting mechanism; 1-1, connecting blocks of the scraper holders; 1-2, a single scraper hanging rack; 2. a powder falling transition piece; 2-1, a second top thread hole; 3. a scraper powder uniform distribution mechanism; 4. a doctor holder; 5. a scraper leveling mechanism; 5-1, precisely adjusting bolts; 5-2, installing a flange; 5-3, a side connecting plate; 5-4, compressing the spring; 5-5, a connecting shaft; 5-6, a first top thread hole; 6. a scraper frame connecting plate; 6-1, a powder storage tank; 6-2, limiting bulges; 7. a powder containing plate; 7-1, powder falling holes; 7-2, rolling needles; 8. a side limiting plate; 9. a scraper reversing mechanism; 9-1, reversing ejector rods; 9-2, a reversing spring; 9-3, a single scraper buffer plate; 9-4, fixing a 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 is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are 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 spreading device for additive manufacturing equipment, including a powder falling transition connection member 2, a scraper powder uniform distribution mechanism 3, a scraper frame connection 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 powder spreading device main body and used for smoothly transitioning metal powder provided by the powder supply mechanism 10 to the scraper powder uniform distribution mechanism 3 positioned below the powder falling transition connecting piece. The powder falling transition connecting piece 2 is connected with the scraper powder uniform distribution mechanism 3 through a bolt, a plurality of jackscrew holes 2-1 are formed in the powder falling transition connecting piece 2, the jackscrew holes 2-1 are connected with the jackscrew two through internal threads 2-1, the height of the powder falling transition connecting piece 2 is adjusted, the adjustment of the size of a gap between the powder falling transition connecting piece and the powder supply mechanism 10 is achieved, when the powder laying device moves to the position below the powder supply mechanism 10, the height of the powder falling transition connecting piece 2 is adjusted through a plug ruler, the gap is uniform on the two sides of the powder falling transition connecting piece 2, the powder cannot be overflowed by raising dust, and sealing rings are arranged between the two sides of the powder falling transition connecting piece 2 and the scraper powder uniform distribution mechanism 3.
The scraper powder equally-dividing mechanism 3 is used for equally dividing powder falling into the scraper powder equally into two equal parts and flowing the powder 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. Scraper powder equipartition mechanism 3 installs on scraper frame connecting plate 6, scraper powder equipartition mechanism 3 comprises two powder guiding plates that the structure is the same, two the powder guiding plate adopts the combination of cross stack form, makes the area that powder paving device both sides powder fell into the same, and when powder flowed to scraper powder equipartition mechanism 3 through gravity, the powder guiding plate can be with the powder respectively leading-in the powder storage tank 6-1 of both sides, because both sides lead the powder area the same so the powder volume of both sides also be the same.
The powder storage groove is characterized in that side limiting plates 8 are respectively installed at two ends of the scraper frame connecting plate 6, a powder pocket plate 7 is arranged below the powder storage groove 6-1, two ends and the lower portion of the powder pocket plate 7 are respectively in contact with the side limiting plates 8 through roller pins 7-2, a gap is reserved between the two ends and the scraper frame connecting plate 6, the middle of the powder pocket plate 7 is open, powder falling holes 7-1 are respectively formed in two sides of the powder pocket plate 7, the powder pocket plate 7 is movable and is limited in stroke through limiting protrusions 6-2 located at the bottom of the scraper frame connecting plate 6, and the powder falling holes 7-1 on the corresponding sides correspond to 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 paving device, when the powder paving device moves to the front and back reversing positions 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 a limit position at one side to a limit position at the other side, the powder limited in the powder storage groove 6-1 falls onto the powder bed through the powder falling hole 7-1 to realize powder falling of the powder paving device; after the powder laying device finishes powder falling, powder laying is carried out through a scraper adjusted in advance.
The scraper frame 4 is used for installing scrapers, and the types of the installed scrapers comprise brush scrapers, rubber scrapers, steel scrapers, ceramic scrapers and the like. The scraper frame 4 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 4 penetrates through the through holes through connecting bolts to be connected with connecting shafts 5-5 of the scraper leveling mechanism 5, internal thread counter bores are formed in the connecting shafts 5-5, when the connecting shafts 5-5 of the scraper leveling mechanism 5 are adjusted, the scraper frame 4 moves along with the connecting shafts 5-5, the scraper and a base plate are adjusted to be completely parallel, and the scraper frame 4 is convenient to disassemble.
The scraper reversing mechanism 9 is respectively positioned at the front and rear reversing positions 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 is composed 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, a through hole is formed in the single scraper buffer plate 9-3, the single scraper buffer plate 9-3 is installed on a forming chamber bottom plate 11, 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. The scraper reversing mechanisms 9 are four groups in total, and the reversing positions before and after powder spreading are two groups respectively, so that the reversing stress in the powder spreading process is uniform, and the reversing reliability and stability are ensured.
The two ends of the powder paving device are installed on a horizontal movement mechanism of the 3D printer through the scraper frame connecting mechanism 1, so that the powder paving device can move back and forth along with the horizontal movement mechanism to realize printing and powder paving actions. Specifically, the scraper frame connecting mechanism 1 is composed of a single scraper hanging frame 1-2 and a scraper frame connecting block 1-1, the single scraper hanging 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 the powder paving device main body integrally falls on the scraper frame connecting block 1-1 through the single scraper hanging frame 1-2 to realize fixed connection with the horizontal movement mechanism.
According to the single-scraper bidirectional powder spreading device, the installation and adjustment of the scraper are convenient, the installation and adjustment can be basically completed within ten minutes, the labor cost is greatly reduced, the scraper needs to be replaced in midway, the reference surface is single and convenient to adjust, and the phenomenon that the leveling cannot be performed is avoided.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, and the modifications or the replacements may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a two-way shop powder device of single scraper for vibration material disk equipment which characterized in that: the scraper powder uniform distribution mechanism comprises a powder falling transition connecting piece, a scraper powder uniform distribution mechanism, a scraper frame connecting plate, a powder bag 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 used for stably transitioning the metal powder provided by the powder supply mechanism into the scraper powder uniform distribution mechanism positioned below the powder supply mechanism; the scraper powder dividing mechanism is used for dividing powder falling into the scraper powder dividing mechanism into two equal parts and enabling the powder to flow into the powder storage grooves on two sides of the scraper frame connecting plate below the scraper powder dividing mechanism through gravity; two ends of the scraper frame connecting plate are respectively provided with a side limiting plate, a powder containing plate is arranged below the powder storage tank, two ends and the lower part of the powder containing plate are respectively contacted with the side limiting plates through rolling needles, and a gap is reserved between the two ends and the scraper frame connecting plate; the middle of the powder containing plate is open, powder falling holes are respectively formed in two sides of the powder containing plate, and the positions of the powder falling holes on the corresponding sides correspond to the positions of the powder storage grooves when the powder containing plate moves to the limiting position;
the scraper leveling mechanism is positioned above the scraper frame connecting plate, is connected with a scraper frame penetrating through an opening in the middle 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 base plate; the scraper frame is used for mounting a scraper;
the scraper reversing mechanism is respectively positioned at the front and rear reversing positions of the powder paving device and can collide with the powder pocket plate to realize the reciprocating motion of the powder paving device.
2. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: the scraper leveling mechanism is installed on the scraper frame connecting plate and consists of a side connecting plate, a connecting shaft, an installation flange, a precise adjusting bolt and a compression spring, wherein the side connecting plate is provided with a groove, and the connecting shaft penetrates through the compression spring to be arranged in the groove of the side connecting plate and is fixedly connected with the scraper frame below; mounting flange fixes on the side connecting plate, precision adjusting bolt threaded connection makes connecting axle up end laminate completely with precision adjusting bolt lower extreme terminal surface through compression spring elasticity on mounting flange, side connecting plate both sides are provided with jackscrew hole one, and jackscrew passes a fixed scraper frame in jackscrew hole one.
3. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1 or 2, 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 the scraper leveling mechanism, and internal thread counter bores are formed in the connecting shaft.
4. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: the powder falling transition connecting piece is connected with the scraper powder uniform distribution mechanism through bolts, a plurality of second jackscrew holes are formed in the powder falling transition connecting piece, and the second jackscrew holes are connected with the second jackscrew through internal threads and used for adjusting the height of the powder falling transition connecting piece.
5. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: scraper powder is equallyd divide the mechanism and is installed on scraping the knife rest connecting plate, scraper powder is equallyd divide the mechanism and is become by two powder guiding plate that the structure is the same, two powder guiding plate adopts alternately to pile up the form combination, and the area that makes shop powder device both sides powder fall into is the same.
6. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: and the powder covering plate is used for stroke limitation through a limiting bulge positioned at the bottom of the scraper frame connecting plate.
7. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: the height of the side limiting plate can be adjusted.
8. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: every scraper reversing mechanism comprises single scraper buffer board, switching-over ejector pin, switching-over spring, fixation nut, be provided with the through-hole on the single scraper buffer board, single scraper buffer board is installed on the forming chamber bottom plate, the switching-over ejector pin passes the through-hole and the fixation nut of switching-over spring and single scraper buffer board in proper order and is connected.
9. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 1, wherein: the two ends of the powder laying device are arranged on a horizontal movement mechanism of the 3D printer through a scraper frame connecting mechanism.
10. The single-scraper bidirectional powder spreading device for the additive manufacturing equipment according to claim 9, wherein: the scraper frame connecting mechanism is composed of a single scraper hanging frame and a scraper frame connecting block, the single scraper hanging 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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| 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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| CN114226762B CN114226762B (en) | 2023-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116766588A (en) * | 2023-07-27 | 2023-09-19 | 湖南珞佳智能科技有限公司 | Bidirectional powder spreading device for additive manufacturing and application method thereof |
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| CN114226762B (en) | 2023-10-27 |
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