CN109693376A - Increasing material manufacturing two-way powder laying device - Google Patents
Increasing material manufacturing two-way powder laying device Download PDFInfo
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- CN109693376A CN109693376A CN201910100848.4A CN201910100848A CN109693376A CN 109693376 A CN109693376 A CN 109693376A CN 201910100848 A CN201910100848 A CN 201910100848A CN 109693376 A CN109693376 A CN 109693376A
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- China
- Prior art keywords
- powder
- scraper
- runner
- mounting base
- powdering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses a kind of increasing material manufacturing two-way powder laying devices, it including workbench, the powder supply mechanism that reciprocally left and right linear slide is installed on workbench, is installed on workbench for driving the first driving device of powder supply mechanism sliding, the powder supply mechanism includes the scraper mounting base to be reciprocatingly slided by first driving device driving, is installed on the scraper of scraper mounting base bottom and is set to two powdering runners in scraper mounting base and being located at left and right sides of scraper；The present invention can two-way powder laying, avoid idle stroke, be effectively utilized two-way travel carry out powdering operation, improve powdering efficiency.
Description
Technical field
The invention belongs to increases material manufacturing technology field, in particular to a kind of increasing material manufacturing two-way powder laying device.
Background technique
Based on the process characteristic that increasing material manufacturing equipment is successively processed, before each scanning machining, will sprawl one layer it is new
Powder, for being sintered or melting；Large-scale increasing material manufacturing equipment shaping area is big, and required powdering blade construction span is big, and stroke is remote,
There certainly will be higher requirement to the scraper device rigidity of structure and working efficiency；In the prior art, in a cycle of power spreading device
Interior is single stone and scraper, easily leads to idle stroke, reduces working efficiency.
Therefore, in order to solve the above problem, a kind of increasing material manufacturing two-way powder laying device is needed, can be realized two within the monocycle
Secondary powdering avoids idle stroke, improves working efficiency, and control mechanism is simple and compact for structure, controls easy to operate.
Summary of the invention
In view of this, the present invention provides a kind of increasing material manufacturing two-way powder laying device, it can be realized and spread twice within the monocycle
Powder avoids idle stroke, improves working efficiency, and control mechanism is simple and compact for structure, controls easy to operate.
Increasing material manufacturing two-way powder laying device of the invention, including workbench, reciprocally left and right linear slide is installed on work
Powder supply mechanism on platform is installed on first driving device on workbench for driving powder supply mechanism to slide, the powder supply mechanism
Including reciprocatingly slided by first driving device driving scraper mounting base, be installed on the scraper of scraper mounting base bottom and set
It is placed in two powdering runners in scraper mounting base and being located at left and right sides of scraper.
Further, can penetrate through direction sliding in the powdering runner along it is provided with runner liner, on the workbench
It is provided with the pressing device being used cooperatively with runner liner, after the runner liner is docked with the powder feeding tank of powder feeder unit, is compressed
Device is pressed on runner liner bottom and makes runner liner upward sliding and constitute the stream of closure between the powder feeding tank of powder feeder unit
Road.
Further, the pressing device be set to be respectively cooperating on workbench two that two runner liners use it is convex
Platform, the opposite side of two boss has extends the inclined-plane or curved surface gradually raised along the two center outward, described oblique
Face or curved surface with corresponding runner liner bottom for contacting and making in runner lining sliding pressure tightly in powder feeder unit.
Further, there is the curved surface being arc-shaped in the opposite side of described two boss.
Further, runner liner top and bottom edge, which has, extends outwardly for runner liner to be limited to powdering
Defining flange in runner.
Further, the defining flange of two runner liner bottoms extends along the front and back side of scraper respectively and exceeds scraper
With the front and back end of scraper mounting base, two boss set up separately the front and back side with scraper and scraper mounting base and with substrate in two runners
The defining flange in portion is used in combination.
Further, there is the inclined-plane tilted upward from outside to inside at the top of scraper mounting base, so that scraper mounting base is installed on the
Triangle cantilever design is formed in one driving device.
Further, the side of scraper mounting base offers the fleshing through slot of section triangular shape.
Further, scraper mounting base bottom is provided with T shape mounting groove, and T shape installation base, T shape are provided at the top of scraper
Installation base is set in T shape mounting groove.
Further, the scraper bottom is provided with chamfering along the two sides of scraper glide direction.
Beneficial effects of the present invention:
The present invention can avoid idle stroke, improve by realizing two-way powder laying operation to powder supply in different powdering runners
Powdering efficiency, while powder supply runner is integrated in scraper mounting base, switching device that no setting is required realizes the bidirectional operation of powdering, this
Structure simplifies the structure of two-way powder laying, scrapes powder and power spreading device is integrated in one, and improves powdering and scrapes the stability of powder, and two
Person's interaction, improves powdering effect；Powder supply runner temporarily accepts powder in moving process, this structure can facilitate selectivity
To carrying out powder supply in powder supply runner, the powder supply to different powder supply runners can be realized by the stroke control to scraper mounting base
Operation, the switching device of this structure no setting is required powder supply runner, and to powder supply in powder supply runner before powdering, so that powder exists
Squeezed state in powder supply runner remains constant, and the powder bed of laying remains that thin and thick is uniform, improves powdering quality；
When powder supply of the present invention, runner liner is realized by the cooperation of simple boss structure and the journey that migrates of scraper mounting base
Closure runner is formed between powder feeder unit, is effectively prevented fugitive dust and is blocked laser effect sintering or fusing effect, also avoids
Fugitive dust influences powdering effect, while also reducing fugitive dust dust pollution phenomenon caused by the inside and outside environment of work chamber, improves burning
Effect and powdering effect are tied, the working environment inside and outside work chamber is improved；Boss structure is simple, easily operated, and no setting is required specially
The sliding of runner liner can be realized in power device；Curved surface in the arc-shaped is arranged in boss, this structure makes runner liner
When moving up along boss curved surface, initial velocity is larger, and when being moved to highest point, speed goes to zero, so that at the top of runner liner
Defining flange when being bonded with powder feeder unit bottom, stress is more uniform, and the obturation effect both improved is avoided due to speed
It is too fast and caused by rigid collision, during being used for multiple times, it is ensured that two this sealing effects improve making for runner liner
Use number.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is schematic diagram of the three-dimensional structure；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is schematic cross-sectional view of the present invention；
Fig. 4 is the A point enlarged structure schematic diagram of Fig. 3；
Fig. 5 is powder supply roller bearing driving device structure schematic diagram；
Fig. 6 is boss enlarged structure schematic diagram；
Fig. 7 is scraper mounting base structural schematic diagram；
Fig. 8 is runner inner lining structure schematic diagram；
Fig. 9 is powder supply roller bearing mounting base structural schematic diagram；
Figure 10 is powder supply rolling shaft structure schematic diagram；
Figure 11 is powder supply box structure schematic diagram；
In attached drawing: 1- scraper mounting base, 2- scraper, 3- powdering runner, 4- pacify for powder box, 4a- powder falling portion, 5- powder supply roller bearing
Fill seat, 5a- powder falling slot, 5b- holding groove, 6- powder supply roller bearing, 6a- quantitatively supplying powder slot, 6b- polygon drive lugs, 7- powder supply chamber,
8- powder supply plate, 8a- powder feeding tank, 9- runner liner, 10- defining flange, 11- boss, 12- accumulator tank, 13- shaft, 14- opening and closing
Door, 15- guide rail, 16- work chamber, 17- unthreaded hole, 18- workbench, 19- first motor, 20- ball-screw, 21- connecting plate, 22-
Fleshing through slot, 23- third motor, 24- driving pulley, 25- driven pulley, 26- belt, 27- backboard, 28- bearing, 29- guiding
Wall, 30- mounting plate, 31- reinforcing rib.
Specific embodiment
Fig. 1 is schematic diagram of the three-dimensional structure；Fig. 2 is schematic structural view of the invention；Fig. 3 is that sectional structure of the present invention shows
It is intended to；Fig. 4 is the A point enlarged structure schematic diagram of Fig. 3；Fig. 5 is powder supply roller bearing driving device structure schematic diagram；Fig. 6 is put for boss
Big structure schematic diagram；Fig. 7 is scraper mounting base structural schematic diagram；Fig. 8 is runner inner lining structure schematic diagram；Fig. 9 is powder supply roller bearing
Mounting base structural schematic diagram；Figure 10 is powder supply rolling shaft structure schematic diagram；Figure 11 is powder supply box structure schematic diagram；
The present embodiment middle left and right direction is corresponding with the direction Fig. 2, that is, facing is this implementation on the left of product shown in Fig. 2
Left direction in example, facing product right side shown in Fig. 2 is the right direction in the present embodiment.
As shown in the figure: the increasing material manufacturing of the present embodiment is two-way for power spreading device, including workbench, reciprocally left and right straight line is sliding
The dynamic powder supply mechanism being installed on workbench, be installed on the first driving device on workbench for driving powder supply mechanism to slide with
And be installed on workbench and be located at for two powder feeder units for powder supply mechanism powder supply on powder supply mechanism sliding path, it is described
Powder supply mechanism includes the scraper mounting base 1 to be reciprocatingly slided by first driving device driving, is installed on scraper mounting base bottom
Scraper 2 and the two powdering runners 3 for being set in scraper mounting base and being located at left and right sides of scraper, the powder feeder unit bottom
Powder feeding tank 8a is offered, two powdering runners are respectively used to the powder that two powder feeding tanks of undertaking are fallen and realize the two-way of powder supply mechanism
Powdering；
Workbench is not limited to traditional open platform in the present embodiment, and the preferred workbench of the present embodiment is work chamber
16, work chamber is hollow rectangular parallelepiped structure, and the components such as powder supply mechanism, the first driving structure and powder feeder unit are set to work
To make in the inner cavity of cabin, the side wall of work chamber offers operation window, and certainly, the specific structure of work chamber is not limited to rectangular parallelepiped structure,
It can be adjusted correspondingly according to the product of printing and the factors such as setting of inner components, and details are not described herein again, work
The unthreaded hole 17 passed through for laser is offered at the top of cabin, it is logical that the bottom face unthreaded hole of work chamber is connected with the forming extended downwardly
Road is provided with forming workbench 18 in formed channel, and forming workbench is liftable to be set in formed channel, and shape is specifically gone up and down
Formula can realize that details are not described herein again by linear motor, hydraulic cylinder or other structures, and two powder feeder units are set to forming work
The left and right sides of platform 18, first driving device use first motor 19, and first motor and the transmission of ball-screw 20 cooperate, ball wire
Thick stick is threadedly coupled with sliding block, and sliding block is raised on 21 back of connecting plate, and scraper mounting base back fixation is connected on front side of connecting plate,
The accurate driving to powder supply mechanism is realized by the cooperation of motor and ball-screw, and there are two bearings for setting on work chamber side wall
Seat, ball-screw both ends are installed on the bearing in bearing block, and concern lead screw is made to be rotatably assorted with work chamber through this structure,
The stability of ball-screw is improved, scraper mounting base bottom is provided with T shape mounting groove, and the installation of T shape is provided at the top of scraper
Boss, T shape installation base are set to the installation that scraper is realized in T shape mounting groove, this structure facilitates the installation and removal of scraper, just
In Maintenance and Repair, scraper bottom is provided with chamfering along the two sides of scraper glide direction, during powder is scraped in scraper sliding, by falling
Angle has downward pressure to powder, and, to adjust the compaction rate of powder, can be improved by pressure under the angular adjustment of chamfering
Powder laying effect；There is the inclined-plane tilted upward from outside to inside in scraper mounting base, may make scraper to install by this inclined-plane
Seat side forms triangular structure or forms ladder structure of right angle, and scraper mounting base 1 is installed on connecting plate 21 and forms triangle
Cantilever design improves the stability of scraper mounting base, and certainly, scraper mounting base is not limited to this cantilever design, when for big
When type increasing material manufacturing apparatus, since scraper installation holder structure is larger, guide rail shape can be set in scraper mounting base two sides at this time
At aerial construction, scraper mounting base is driven to run on two guide rails by driving device, when scraper installation holder structure is larger,
The arrangement that other forms can be used improves the stability of scraper mounting base, and details are not described herein again；The side of scraper mounting base
Fleshing through slot 22 is offered, fleshing through slot cross section structure triangular in shape is guaranteeing scraper mounting base overall structure through this structure
The weight that scraper mounting base is reduced under the premise of intensity reduces the materials of scraper mounting base, save the cost, two powdering streams
Road 3 is penetrated through from the inclined-plane in scraper mounting base to bottom, by this inclined-plane scraper mounting base and powder feeder unit can be formed good
Good cooperation forms a closed runner, can effectively reduce that is, so that powder feeding tank 8a and powdering runner form good perforation
Fugitive dust improves powdering effect, while scraper mounting base is divided into three parts by two powdering runners, that is, is located at two powdering streams
Two parts on the outside of road and a part among two powdering runners, this three parts structure are vertically playing reinforcing rib
Effect, since runner liner is with the vertical engagement process of powder supply plate, scraper mounting base will receive vertical active force, by this plus
Strengthening tendons structure vertically improves the intensity of scraper mounting base, and shape occurs when preventing scraper mounting base by vertical active force
Become, avoids improving powdering since deformation occurs and leads to runner liner and powdering runner deformation occurs for scraper mounting base
Stability and powdering effect, while scraper mounting base provides stable support for scraper, avoids scraper stress and deformation and influences
Scrape powder effect；
When in use, the sliding stroke of scraper mounting base is accurately controlled by controlling the start and stop of first motor 19, when scraping
Knife mounting base from left to right powdering when, powdering runner on the right side of scraper carries out powdering operation, while after being located at glide direction
The scraper of side carries out scraping powder operation, and the powder stored in powder supply runner when laying to the rightmost side is just fallen to the greatest extent, is now placed in and scrapes
Powdering runner on the left of knife is docked with the powder feeding tank of right side powder feeder unit, by the powder feeder unit on right side on the left of scraper
Powdering runner realizes powder supply operation, and part of flow of powder to work chamber bottom, which is formed, accumulates and block up powdering runner bottom
Plug, so that powder storing is in powdering runner, the position of powder accumulation is preferably disposed on formed channel side, can avoid pile of grounds
The influence that product is laid with powder on forming workbench, when scraper mounting base is slided from right to left, left side powdering runner is spread
Powder operation, while being located at the scraper on rear side of glide direction and carrying out scraping powder operation, it is stored in powder supply runner when laying to the leftmost side
Powder just fall to the greatest extent, be now placed in the powdering runner on the right side of scraper and docked with the powder feeding tank of left side powder feeder unit, pass through on the left of
Powder feeder unit to be located at scraper on the right side of powdering runner realize powder supply operation, then scraper mounting base continuation realize from left to right
Powdering operation, carries out next powdering process, the powdering being always ensured that on front side of scraper mounting base glide direction during powdering
Runner carries out powdering operation, and scraper, which is located at rear side, to carry out scraping powder operation, what this was obviously contemplated that for those skilled in the art,
Specifically repeat no more；Two-way powder laying operation is realized by above-mentioned powdering process, is avoided idle stroke, is improved powdering efficiency, together
When powdering runner be integrated in scraper mounting base, switching device that no setting is required realizes the bidirectional operation of powdering, this structure simplifies
The structure of two-way powder laying, scrapes powder and power spreading device is integrated in one, and improves powdering and scrapes the stability of powder, the two phase interaction
With improving powdering effect；Powdering runner temporarily accepts powder in moving process, this structure can facilitate selective to powdering
Powder supply is carried out in runner, and the powder supply to different powdering runners can be realized to the stroke control of scraper mounting base by first motor
Operation, the switching device of this structure no setting is required powdering runner, and to powder supply in powdering runner before powdering, so that powder exists
Squeezed state in powdering runner remains constant, and the powder bed of laying remains that thin and thick is uniform, improves powdering quality.
Direction sliding can be penetrated through in powdering runner described in the present embodiment along it is provided with runner liner 9, the work
The pressing device being used cooperatively with runner liner is provided on platform, after the runner liner is docked with powder feeding tank 8a, pressing device
Runner liner bottom is pressed on to make runner liner upward sliding and constitute the runner of closure between powder feeding tank；The setting of powdering runner
For through slot structure, similar to the waist-shaped hole structure of lengthening, runner liner is thin-walled annular structure compatible with powdering runner, this
When powder feeder unit powder supply when, powder storing is in runner liner, after runner liner is docked with powder feeding tank 8a, passes through pressing device pressure
Make its upward sliding in runner liner bottom, runner liner bottom is against powder feeder unit bottom and makes runner liner and powder feeding tank
Between form closure runner, pressing device can be the hydraulic mechanism for being set to work chamber bottom, when normal condition, hydraulic mechanism
Output end bounces back in work chamber bottom, and the components such as hydraulic mechanism output end and scraper is avoided to interfere, when scraper is installed
After seat positioning is so that runner liner docks with powder feeding tank 8a, hydraulic structure, which acts its output end and moves up, is against runner liner bottom,
Realize moving up for runner liner, certain pressing device is not limited to hydraulic system, can pass through the other structures such as spring part, motor
Form provides the power compressed, and details are not described herein again；Powder fugitive dust caused by this structure can effectively avoid due to intermediate gap,
It effectively prevents fugitive dust and blocks laser effect sintering or fusing effect, also avoiding fugitive dust influences powdering effect, while also reducing
Fugitive dust dust pollution phenomenon caused by the inside and outside environment of work chamber, improves sintering quality and powdering effect, improves work
Working environment inside and outside cabin.
In the present embodiment, the powder feeder unit include be fixed on the worktable for store powder for powder box 4, be connected to
Powder supply cassette bottom portion is simultaneously used for the quantitatively supplying powder mechanism for powdering runner quantitatively supplying powder, the quantitatively supplying powder with for the perforation of powder box inner cavity
Actuator base offers the powder falling slot 5a for powder falling；This powder falling slot 5a can be used directly as powder feeding tank 8a, certainly such as Fig. 3 institute
Show, powder feeding tank is opened on powder supply plate and is located at below powder falling slot, and the two is formed through closure runner, for powder box and quantitatively supplying powder
The connection of mechanism removably can be integrated in the two in quantitatively supplying powder mechanism for powder box certainly and be integrally formed setting, the present embodiment
In preferred detachable connection method, facilitate the disassembly for powder box and quantitatively supplying powder mechanism, maintenance, for the side wall of powder box at least side
It tilts down and to form guide wall 29 powder supply cassette bottom portion is reduced downwards, guide wall is parallel to holding groove length direction, described to lead
Holding groove side is extended downward into wall, by being oriented to the flowing of wall guided powder, the delay of powder is avoided, for powder box by powder
It being supplied by the powder falling slot of quantitatively supplying powder mechanism to powder feeding tank, quantitatively supplying powder mechanism can be accurately powder supply in powdering runner,
The speed of powder outflow and the sliding speed and sliding distance of scraper mounting base of cooperation powdering runner accurately control powder
Laying area, when scraper mounting base slides into least significant end, it is ensured that powder inside fall to the greatest extent, avoid invalid powdering from operating,
The utilization rate for improving powder reduces the powder for needing to recycle, improves powdering efficiency.
There is horizontal-extending mounting plate 30 in powder supply cassette bottom portion, between the mounting plate and guide wall on the outside of for powder box
Form Delta Region；Between the mounting plate and guide wall formed Delta Region in be provided with it is a plurality of by the two be linked together plus
Strengthening tendons 31 are provided with a guide wall for powder box as shown in figure 11, so that being installed for the trapezoidal structure in powder box side by setting
Plate improves the stability installed for powder box, while by adding reinforcing rib raising for the integral strength of powder box.
There is edge in the present embodiment, at the top and bottom of the runner liner extends outwardly for runner liner to be limited to
Defining flange 10 in powdering runner, the pressing device are to be set on workbench to be located at below two powder feeding tank 8a simultaneously
Two boss 11 that two runner liners use are respectively cooperating with, the opposite side of two boss has outside along the two center
Side extends the inclined-plane or curved surface gradually raised, the inclined-plane or curved surface for connecing with the defining flange below corresponding runner liner
It touches and makes in runner lining sliding pressure tightly on powder feeder unit；Upper and lower defining flange and runner liner form I-shaped structure, limit
The length of width or defining flange that the width of position flange should be greater than powdering runner should be greater than the length of powdering runner, to reach
Runner liner is limited to the purpose in powdering runner, the height of runner liner should be slightly above the height of powdering runner, so that stream
Road liner can slide up and down in powdering runner, can increase and be pressed on the binding face of powder feeder unit bottom by upper limit flange,
So that the two fits closely, the obturation effect of the two is improved, upper limit flange may be configured as elastic material, such as rubber material,
During runner liner moves up, powder feeder unit bottom is deformed in by the upper limit flange extrusion of rubber material, so that runner
The runner of closure is constituted between liner and powder feeding tank, boss may be configured as wedge block, may be alternatively provided as semicircular structure, certainly
It may be configured as other polymorphic structures, details are not described herein again, preferred semi-circular lands in the present embodiment, as shown in fig. 6, scraping
When knife mounting base is moved to the leftmost side, boss 11 gradually raises the limit of the runner liner bottom on the right side of scraper by extrados
Position flange, the defining flange of top is pressed in powder feeder unit bottom, so that constituting the stream of closure between runner liner and powder feeding tank
Road, when boss and defining flange disengaging, runner liner is cooperated by the automatic reset of gliding of self weight by simple boss structure
The sliding stroke of scraper mounting base realizes the closure between runner liner and powder feeding tank, this structure is simple, easily operated, is not necessarily to
Dedicated power device, which is arranged, can be realized the sliding of runner liner.
In the present embodiment, the defining flange of two runner liner bottoms extends and exceeds along the front and back side of scraper respectively
The front and back end of scraper and scraper mounting base, two boss be divided into the front and back side of scraper and scraper mounting base and in two runners
The defining flange in substrate portion is used in combination；As shown in fig. 6, being located at the runner liner on the right side of scraper, the defining flange of bottom
The front side for extending forwardly into scraper and scraper mounting base front end face, the boss setting on the left of forming workbench in scraper and are scraped
The front side of knife mounting base front end face, similarly for the runner liner being located on the left of scraper, bottom defining flange is extanded rearward to
The rear side of scraper and scraper mounting base rear end face, after the boss on the right side of forming workbench is set to scraper and scraper mounting base
The rear side of end face is provided allows bit space through this structure, and scraper mounting base and scraper are not sent out in sliding process with boss
Raw interference, and runner of the boss not with runner liner intersects, and does not interfere the laying of powder.
In the present embodiment, there is the curved surface being arc-shaped in the opposite side of described two boss 11；Curved surface in the arc-shaped is set,
The defining flange of runner liner bottom is against when moving upwards on curved surface, and the speed that runner liner moves up is curved variation,
By the bending radius of Control curve to control the initial velocity and terminate speed that liner moves up, at two in the present embodiment
The opposite side bottom of boss to its highest point is preferably provided to 1/4 arc surface, and the curved surface tangent line of boss highest point is horizontal；This structure
When so that runner liner being moved up along boss curved surface, initial velocity is larger, and when being moved to highest point, speed goes to zero, so that
Defining flange at the top of runner liner is gently bonded with powder feeder unit bottom, uniform force, is improved the obturation effect of the two, is avoided
Rigid collision caused by as excessive velocities, during being used for multiple times, it is ensured that the sealing effect of the two improves runner
Boss is arranged to semicircular structure, sagittal plane end in the present embodiment for convenience of the manufacture of boss by the access times of liner
Fit in work chamber bottom.
In the present embodiment, the quantitatively supplying powder mechanism includes powder supply roller bearing mounting base 5, powder supply roller bearing 6 and driving powder supply
The second driving device that roller bearing is rotated centered on its own axis, the powder supply roller bearing mounting base are connected to powder supply cassette bottom portion,
Columnar powder supply chamber 7 is offered in the powder supply roller bearing mounting base, the powder supply roller bearing diameter is adapted simultaneously with powder supply chamber diameter
Rotatably it is installed on that powder supply is intracavitary, offering above the powder supply roller bearing mounting base makes for powder box inner cavity and the perforation of powder supply chamber
Holding groove 5b, the powder falling slot 5a are opened in powder supply roller bearing mounting base lower section, and the powder supply roller bearing circumferential surface is evenly distributed with along axis
To the quantitatively supplying powder slot 6a of extension；When powder supply roller bearing mounting base is with setting is integrally formed for powder box, holding groove 5b is directly from confession
To powder supply cassette bottom portion, when the two is arranged using removably, holding groove uses two-part structure, that is, exists for perforation above powder chamber
Above powder supply chamber and powder supply cassette bottom portion is provided with holding groove, and two holding grooves dock the runner to form closure, holding groove with
And powder falling slot, along the axially extending of powder supply chamber, powder falling slot position is opened in the top and the bottom of powder supply chamber with holding groove respectively,
So that powder falling slot position is in the underface of holding groove, quantitatively supplying powder slot radial section can be for semicircle shape, rectangle or other are polygon
Shape structure, powder supply roller bearing are gap-matched with powder supply chamber, and gap width is adjustable according to factors such as powder particle sizes, work as powder supply
When roller bearing rotates, above quantitatively supplying powder slot 6a when being docked with holding groove 5b, in flow of powder to quantitatively supplying powder slot, when this determines
When amount powder feeding tank is docked with powder falling slot, in flow of powder to powder falling slot, the accurate flow control of powder is realized, powder supply roller bearing turns
The dynamic effect that can be achieved actively to extract powder avoids going out for the phenomenon that unsmooth flowing caused by the powder in powder box for a long time accumulation
It is existing, as shown in Figure 9 and Figure 10, at powder supply chamber both ends there is diameter to be greater than the mounting hole of the intracavitary diameter of powder supply, this mounting hole is as axis
Seat use is held, powder supply roller bearing both ends are rotatably assorted by bearing 28 in bearing block, and powder supply roller bearing can pass through peripheral hardware third motor
Direct-connected driving, as shown in figure 5, each quantitatively supplying powder mechanism respectively configures second driving device, the second driving in the present embodiment
Device includes third motor 23, driving pulley 24, driven pulley 25, belt 26, and driving pulley 24 and third motor drive cooperate,
Powder supply roller bearing and the transmission of driven pulley 25 cooperate, and driving pulley and driven pulley pass through the transmission cooperation of belt 26, each quantitative confession
Powder mechanism respectively configures the convenient independent control to quantitatively supplying powder mechanism of a set of drive system, and the driving of certain powder supply roller bearing is simultaneously unlimited
In this structure, shift fork can also be cooperated to realize the control to two powder supply roller bearings by retarder, details are not described herein again.
In the present embodiment, second driving device include be installed on the actuator being used to provide power on workbench and
The mediation member of powder supply roller bearing is driven and reached power by actuator, and powder supply roller bearing end is provided with for in
Between the polygon drive lugs 6b that cooperates of driving member, be provided on the mediation member compatible with polygon drive lugs
Driving hole, the polygon drive lugs 6b are located in driving hole；Actuator is third motor, and mediation member is actively
Belt wheel, driven pulley and belt, certain mediation member can be to be direct-connected in the monomer wheel on third motor output shaft, specifically not
It is repeating；The powder supply roller bearing mounting base is removably connected to work chamber inner wall, and driven pulley is passed by driving hole and polygon
Rotational motion is transferred to powder supply roller bearing by the cooperation of dynamic convex block, and polygon drive lugs can be rectangular cam, triangle or five
The structures such as side shape or hexagon, polygon drive lugs are not limited to the polygonized structure of traditional sense, or spline, tooth
The polygonized structures such as colyliform, details are not described herein again, and driven pulley can be unitary structure, i.e. a Wheel structure, wheel body one
There is the mounting hole for cooperating with drive shaft at end, and the other end is provided with driving hole, and driven pulley may be duplex, that is, exist
There are two Wheel structure, one of wheel body and drive shafts to cooperate for axial setting, another wheel body is matched with polygon drive lugs
It closes, is not repeating specifically, it, can be directly by quantitatively supplying powder mechanism and confession when carrying out powdering operation for different classes of powder
Powder box is removed, and is installed in place by new quantitatively supplying powder mechanism and for powder box, and the polygon of the powder supply roller bearing end after replacement passes
Dynamic convex block and driving hole cooperate, and powder supply roller bearing mounting base is being fixed in work chamber by screw, this structure is convenient quantitatively to be supplied
Powder mechanism and disassembly and replacement for powder box component as a whole, improve the continuous work ability of the present apparatus, when needing
When will be with changing powder, directly with changing quantitatively supplying powder mechanism and for powder box, it can avoid caused by original equipment is dismantled and cleaned
Operating interruptions.
In the present embodiment, the powder feeder unit further includes powder supply plate 8, and the powder supply plate 8 is vertically extending to be connected to powder supply rolling
Axis mounting base bottom is simultaneously covered in powder falling slot bottom end, and the powder feeding tank 8a is vertically opened on powder supply plate 8 and passes through with powder falling slot 5a
It is logical；Pass through powder supply plate, it is possible to increase the distance between powder supply roller bearing mounting base and scraper mounting base facilitate between each components
Arrangement, by the setting of powder supply plate, so that powder supply trench bottom is close to each other between powdering runner top as far as possible, in powder supply roller bearing
After mounting base is docked with scraper mounting base, so that forming closed runner between powder feeding tank and powdering runner, the powder fallen is produced
Raw dust controlling reduces pollution of the fugitive dust to environment and the influence to powdering quality, improves paving in closed runner
Silty amount.
It is described that the powder falling portion 4a being arc-shaped to lower recess radial section, institute are provided with for 4 bottom of powder box in the present embodiment
Holding groove 5b is stated to be opened in powder falling portion bottom and axially extend, it is described for being coaxially arranged with shaft 13 with powder falling portion in powder box 4,
The open and close door 14 of the rotating shaft transmission cooperation being connected with for opening or closing holding groove, the open and close door fit in powder falling portion
4a medial surface is simultaneously adapted with powder falling portion medial surface；As shown in figure 4, powder falling portion is strip and prolongs along powder supply roller bearing axial direction
It stretches, powder falling portion is located at the lowest part for powder box, extends downward into powder falling portion edge for the side wall of powder box, passes through the guiding of side wall
So that powder flows into powder falling portion, it is always ensured that in powder falling portion full of powder, it is each quantitative when cooperation powder supply roller bearing extracts powder
The amount of powder that powder feeding tank is extracted maintains in lesser error range, and avoiding leads to each quantitative confession since flow of powder is unsmooth
The amount of powder deviation extracted in powder tank is excessive, improves powder supply precision；Open and close door be semi-annular shape structure, the outer diameter of open and close door with
The internal diameter in powder falling portion is identical, and open and close door is cooperatively connected by fan-shaped connecting rod transmission in shaft, when shaft rotates, open and close door
It is fitted in the medial surface sliding in powder falling portion, open and close door can be used elastic material or metal material, according to the difference of open and close door material,
It can be cooperated by way of clearance fit or transition fit between open and close door and powder falling portion, when open and close door uses metal material,
The mode that clearance fit can be used avoids the two frictional force excessive, when biggish material elastic using rubber etc., can be used
The mode of cooperation is crossed, powder can be pushed into side during closure or openness, facilitate open and close door by the open and close door of this structure
Opening and closing, powder not will cause the stuck phenomenon of open and close door, improve the operational reliability of open and close door, reduce powder to open and close door
Opening and closing and the influence closed.
In the present embodiment, there are two accumulator tank 12, two accumulator tanks for setting on powder supply mechanism path on the workbench
It is divided into the left and right sides in powdering region；Accumulator tank is set to the two sides of two powder feeding tank 8a, and is located at the outside of two convex blocks,
The settable recycling box in work chamber bottom, recycling box inner cavity are penetrated through by accumulator tank and work chamber inner cavity, and scraper is by extra powder
It is pushed at accumulator tank, powder is fallen in recycling box by accumulator tank, facilitates the recycling of powder.
In the present embodiment, it is fixedly connected on the workbench and is led with scraper mounting base with the use of what is be oriented to it
Rail 15, as shown in figure 5, guide rail, first motor and ball-screw are fixedly connected on backboard 27, backboard is fixed on work chamber
On inner sidewall, for the operation stability for improving scraper mounting base, setting up and down there are two track on front side of backboard, ball-screw is set
It is placed between two tracks, connecting plate back is provided with track groove compatible with track, and track and track groove may be configured as swallow
Shape of tail, which is coupled, realizes that the single-degree-of-freedom linear slide of the two may be alternatively provided as other structures form and realize single-degree-of-freedom straight line
Sliding, details are not described herein again.
In the present embodiment, the powder supply chamber axial direction and powder supply mechanism glide direction are perpendicular；Powder supply chamber axial direction
Vertical with powder supply mechanism glide direction but allow to be kept at an angle error, specific error range is true according to practical laying condition
It is fixed, the shape of powder plane laying can be improved through this structure, improve powder laying effect.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of increasing material manufacturing two-way powder laying device, it is characterised in that: including workbench, reciprocally left and right linear slide is installed on
Powder supply mechanism on workbench is installed on first driving device on workbench for driving powder supply mechanism to slide, the powdering
Mechanism include by first driving device driving reciprocatingly slide scraper mounting base, be installed on the scraper of scraper mounting base bottom with
And it is set to two powdering runners in scraper mounting base and being located at left and right sides of scraper.
2. increasing material manufacturing two-way powder laying device according to claim 1, it is characterised in that: can be along it in the powdering runner
The sliding of perforation direction is provided with runner liner, and the pressing device being used cooperatively with runner liner is provided on the workbench,
After the runner liner is docked with the powder feeding tank of powder feeder unit, pressing device is pressed on runner liner bottom and makes runner liner upward
Slide and constitute between the powder feeding tank of powder feeder unit the runner of closure.
3. increasing material manufacturing two-way powder laying device according to claim 2, it is characterised in that: the pressing device is to be set to
Two boss that two runner liners use are respectively cooperating on workbench, the opposite side of two boss has along the two center
Place extends the inclined-plane or curved surface gradually raised, the inclined-plane or curved surface for contacting simultaneously with corresponding runner liner bottom outward
So that lining sliding pressure is tightly on powder feeder unit in runner.
4. increasing material manufacturing two-way powder laying device according to claim 3, it is characterised in that: the opposite side of described two boss
There is the curved surface being arc-shaped.
5. increasing material manufacturing two-way powder laying device according to claim 3, it is characterised in that: at the top of the runner liner and bottom
There is the defining flange to extend outwardly for being limited to runner liner in powdering runner in portion edge.
6. increasing material manufacturing two-way powder laying device according to claim 5, it is characterised in that: two runner liner bottoms
Defining flange extend and exceed respectively the front and back end of scraper and scraper mounting base along the front and back side of scraper, two boss set up separately with
The front and back side of scraper and scraper mounting base is simultaneously used in combination with the defining flange of two runner liner bottoms.
7. increasing material manufacturing two-way powder laying device according to claim 1, it is characterised in that: have at the top of scraper mounting base from outer
Slope inwardly upward inclined-plane, so that scraper mounting base is installed on formation triangle cantilever design in first driving device.
8. increasing material manufacturing two-way powder laying device according to claim 7, it is characterised in that: the side of scraper mounting base opens up
There is the fleshing through slot of section triangular shape.
9. increasing material manufacturing two-way powder laying device according to claim 1, it is characterised in that: scraper mounting base bottom is provided with
T shape mounting groove is provided with T shape installation base at the top of scraper, and T shape installation base is set in T shape mounting groove.
10. according to increasing material manufacturing two-way powder laying device described in claim 1, it is characterised in that: the scraper bottom is sliding along scraper
The two sides in dynamic direction are provided with chamfering.
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| CN201910100848.4A CN109693376B (en) | 2019-01-31 | 2019-01-31 | Bidirectional powder spreading device for additive manufacturing |
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| CN201910100848.4A CN109693376B (en) | 2019-01-31 | 2019-01-31 | Bidirectional powder spreading device for additive manufacturing |
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| CN114535617A (en) * | 2022-02-23 | 2022-05-27 | 深圳市金石三维打印科技有限公司 | Metal powder 3D printing system and printing method |
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| CN109693376B (en) | 2023-05-09 |
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