CN108994297B - Powder feeding device - Google Patents
Powder feeding device Download PDFInfo
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- CN108994297B CN108994297B CN201811036632.8A CN201811036632A CN108994297B CN 108994297 B CN108994297 B CN 108994297B CN 201811036632 A CN201811036632 A CN 201811036632A CN 108994297 B CN108994297 B CN 108994297B
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- powder
- feeding
- flashboard
- material leakage
- conveying channel
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- 239000000843 powder Substances 0.000 title claims abstract description 232
- 239000000463 material Substances 0.000 claims abstract description 161
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 230000008859 change Effects 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000010146 3D printing Methods 0.000 abstract description 11
- 230000007480 spreading Effects 0.000 abstract description 10
- 238000003892 spreading Methods 0.000 abstract description 10
- 238000007639 printing Methods 0.000 description 15
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000007306 turnover Effects 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
- B22F12/50—Means for feeding of material, e.g. heads
- B22F12/52—Hoppers
-
- 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
-
- 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
- B22F12/22—Driving means
- B22F12/224—Driving means for motion along a direction within the plane of a layer
-
- 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
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The invention belongs to the technical field of 3D printing, and particularly relates to a powder feeding device. The device comprises a powder spreading platform, a storage bin and an automatic material leakage mechanism, wherein the automatic material leakage mechanism comprises a material leakage base, a feeding flashboard and a quantitative driving assembly; a material conveying channel for conveying powder to the powder paving platform is arranged in the material leakage base, and the quantitative driving assembly drives the material feeding flashboard to reciprocate relative to the material leakage base to change the opening degree of the material conveying channel and control the quantity of the powder output through the material conveying channel. The material leakage base is provided with a material conveying channel for conveying powder to the powder paving platform, the powder is conveyed to the powder paving platform through the material conveying channel, the material feeding flashboard penetrates through the material leakage base, and the quantitative driving assembly can control the relative material leakage base to reciprocate and change the opening degree of the material conveying channel, so that the quantitative conveying of the powder is realized by controlling the quantity of the powder output through the material conveying channel.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a powder feeding device.
Background
Additive manufacturing (3D printing) is an incremental manufacturing process for constructing three-dimensional objects by continuously fusing more than one thin layer of material, the waste of raw materials, particularly rare materials, can be greatly reduced by using 3D printing to manufacture products, and the characteristics of products which cannot be manufactured by general quantitative removal processing, such as closed inner cavities of the products, inner cavity pipelines of the products which are bent, and the like, can be directly printed by 3D printing. The basic process steps of the 3D printing technology are as follows: storing the three-dimensional model in a computer, and layering the model to obtain the section data of each layer; a powder system or device spreads the powder material into a thin layer on a working platform, and a beam of high energy density (laser or electron beam) scans a cross section of the three-dimensional model over the powder layer; the working platform descends by a distance equal to the thickness of the powder layer, a layer of new powder is paved on the working platform, and the next section of the three-dimensional model is scanned by rays; repeating the steps until the three-dimensional object is manufactured. Wherein the powder raw material is dried and fine, and the average particle diameter is only about 100 μm.
From the above, the use of a powder system or a powder device to tile a powder material on a workbench is one of the key steps affecting the 3D printing technology, and the feeding mode of the existing 3D printing powder device mainly comprises a push type and a turnover type, wherein push type refers to the use of a scraper of a powder feeding device to directly push metal powder, and raw materials are turned over the scraper and conveyed to the feeding front end of the scraper; by inverted it is meant that a quantity of powder is supplied to an inverting mechanism and then inverted for delivery to the doctor blade. However, the above two feeding methods cannot realize quantitative feeding, and there are also defects in the feeding process such as inaccurate feeding position, serious powder waste and low feeding efficiency.
Disclosure of Invention
The invention aims to provide a powder feeding device, and aims to solve the technical problems that the powder feeding device in the prior art cannot realize quantitative feeding and is low in feeding efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme: the powder feeding device comprises a powder spreading platform, a feed bin positioned above the powder spreading platform and used for containing powder, and an automatic material leakage mechanism used for conveying the powder in the feed bin to the powder spreading platform, wherein the automatic material leakage mechanism comprises a material leakage base fixed on the lower bottom surface of the feed bin, a feeding flashboard penetrating through the material leakage base and a quantitative driving assembly connected with the feeding flashboard; a material conveying channel for conveying powder to the powder paving platform is formed in the material leakage base, and the quantitative driving assembly drives the material feeding flashboard to reciprocate relative to the material leakage base so as to change the opening degree of the material conveying channel and control the quantity of the powder output through the material conveying channel.
Further, the material leakage base is provided with an upper surface, a lower bottom surface, a first side edge and a second side edge, wherein the upper surface and the lower bottom surface are oppositely arranged, the upper surface is opposite to the bin, the material conveying channel penetrates through the upper surface and the lower bottom surface, the first side edge of the material leakage base is provided with a penetrating opening for the feeding flashboard to penetrate into the material leakage base, the first end of the feeding flashboard penetrates through the penetrating opening and then is suspended in the material conveying channel, the second end of the feeding flashboard is positioned outside the material leakage base, and the quantitative driving assembly is connected to the second side edge and is used for driving the first end of the feeding flashboard to reciprocate in the material conveying channel so as to change the opening degree of the material conveying channel.
Further, the inner side wall of the material conveying channel, which is close to the second side edge part, is concavely provided with a clamping interface for clamping the first end of the material feeding flashboard towards the second side edge part, and the first end of the material feeding flashboard is driven by the quantitative driving component to be clamped in the clamping interface, or the first end of the material feeding flashboard is driven by the quantitative driving component to be separated from the clamping interface.
Further, a first end of the feeding flashboard is provided with a sealing cushion pad, and the sealing cushion pad is an elastic cushion pad.
Further, the quantitative driving assembly comprises a flashboard pushing piece which is fixedly connected with the feeding flashboard and used for pushing the feeding flashboard to move, the flashboard pushing piece comprises a first guide strip, a second guide strip and a connecting rod connected between the first guide strip and the second guide strip, two opposite ends of the material leakage base are respectively provided with a first guide hole and a second guide hole for the first guide strip and the second guide strip to penetrate through, and the first guide strip and the second guide strip penetrate out of the corresponding first guide hole and the second guide hole and are fixedly connected with the second end of the feeding flashboard;
The quantitative driving assembly further comprises a driving motor for driving the flashboard pushing piece to move, a rotary gear is fixed on a power output shaft of the driving motor, a flashboard pushing rack meshed with the rotary gear is fixed on the connecting rod, and the rotary gear is meshed with the flashboard pushing rack to push the connecting rod to drive the feeding flashboard to reciprocate relative to the material leakage base.
Further, a plurality of elastic pieces are connected between the connecting rod and the material leakage base, and the elastic pieces are arranged between the connecting rod and the material leakage base at intervals.
Further, the elastic piece is a pressure spring, a plurality of first pressure spring guide posts are arranged on the second side edge part at intervals, second pressure spring guide posts are arranged on the connecting rod at intervals, each first pressure spring guide post, each pressure spring and each second pressure spring guide post are in one-to-one correspondence respectively, and two ends of the pressure spring are sleeved on the corresponding first pressure spring guide post and second pressure spring guide post respectively.
Further, the powder feeding device further comprises a powder guiding mechanism, the powder guiding mechanism is fixed on the lower bottom surface of the material leakage base, a scraper capable of moving along the length direction of the powder paving platform is arranged on the powder paving platform, a powder inlet of the powder guiding mechanism is communicated with the material conveying channel, and a powder outlet of the powder guiding mechanism extends to the moving direction of the scraper.
Further, the powder feeding device further comprises a vibrator for improving the feeding smoothness of the powder, and the vibrator is arranged on the bin.
Further, two groups of storage bins and automatic material leakage mechanisms with the same structure are arranged on the powder paving platform, and the two groups of storage bins and the automatic material leakage mechanisms are symmetrically arranged above the two opposite side parts of the powder paving platform.
The invention has the beneficial effects that: the powder feeding device is characterized in that an automatic material leakage mechanism is arranged at the bottom of a storage bin and comprises a material leakage base, a feeding flashboard and a quantitative driving assembly, wherein the material leakage base, the feeding flashboard and the quantitative driving assembly are matched with each other to realize quantitative feeding. Specifically, the material leakage base is provided with a material conveying channel for conveying powder in the storage bin to the powder paving platform, and the powder enters the material leakage base from the storage bin and is conveyed to the powder paving platform through the material conveying channel; the feeding flashboard is penetrated in the material leakage base, and can control the relative material leakage base to reciprocate by the quantitative driving component and change the opening degree of the material conveying channel, so as to control the quantity of the powder output by the material conveying channel, and the quantitative conveying of the powder can be realized through the automatic material leakage mechanism. And set up quantitative actuating mechanism automatic drive pay-off flashboard motion and adjust the opening degree of defeated material passageway, not only can effectually realize the ration feeding of powder, can also avoid appearing because of the excessive or insufficient powder that needs secondary feeding etc. the powder that leads to of feeding extravagant, in addition, once ration feeding can accomplish appointed print work, has improved the printing efficiency of 3D printing, and product production efficiency and quality are all ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural view of a powder feeding device according to an embodiment of the present invention;
FIG. 2 is an assembly view I of a bin and an automatic leak mechanism of a powder feeding device according to an embodiment of the invention;
FIG. 3 is a second assembly view of a bin and an automatic leak mechanism of a powder feeder according to an embodiment of the present invention;
Fig. 4 is a first structural view of an automatic material leakage mechanism of the powder feeding device according to the embodiment of the present invention;
FIG. 5 is a partial view of an assembly of an automatic leak mechanism and a powder guiding mechanism of a powder feeding device according to an embodiment of the present invention;
FIG. 6 is a partially exploded view of an automatic leak mechanism of a powder feeder according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along line A-A of FIG. 5;
fig. 8 is a structural view of a silo of a powder feeding device according to an embodiment of the invention.
Wherein, each reference sign in the figure:
10-powder spreading platform 11-scraper 12-mounting rack
20-Bin 21-bin mounting locking block 22-feeding chamber
23-Powder supply chamber 30-automatic material leakage mechanism 31-material leakage base
32-Feeding flashboard 33-quantitative driving mechanism 34-elastic piece
40-Powder guiding mechanism 41-lower bottom plate 42-upper cover plate
43-Powder conveying space 50-vibrator 121-height adjusting plate
231-Discharge hole 232-material quantity observation window 311-material conveying channel
312-Through hole 313-card interface 314-first guide hole
315-Second guide hole 321-sealing buffer cushion 331-flashboard pusher
332-Driving motor 333-rotating gear 334-flashboard pushing rack
341-First compression spring guide post 342-second compression spring guide post 3111-first feeding chamber
3112-Second feeding chamber 3113-feeding gap 3311-first guide strip
3312-Second guide bar 3313-connecting bar.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to fig. 1 to 8 are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 to 8, the powder feeding device according to the embodiment of the invention comprises a powder spreading platform 10, a bin 20 positioned above the powder spreading platform 10 and used for containing powder, an automatic material leakage mechanism 30 used for conveying the powder in the bin 20 onto the powder spreading platform 10, and the automatic material leakage mechanism 30 comprises a material leakage base 31 fixed on the lower bottom surface of the bin 20, a feeding gate plate 32 penetrating through the material leakage base 31, and a quantitative driving mechanism 33 connected with the feeding gate plate 32; the material leakage base 31 is provided with a material conveying channel 311 for conveying powder to the powder paving platform 10, and the quantitative driving mechanism 33 drives the material feeding flashboard 32 to reciprocate relative to the material leakage base 31 so as to change the opening degree of the material conveying channel 311 and control the quantity of the powder output through the material conveying channel 311.
The powder feeding device of the embodiment of the invention is provided with an automatic material leakage mechanism 30 at the bottom of a storage bin 20, wherein the automatic material leakage mechanism 30 comprises a material leakage base 31, a feeding flashboard 32 and a quantitative driving mechanism 33 which are matched with each other to realize quantitative feeding. Specifically, the material leakage base 31 is provided with a material conveying channel 311 for conveying the powder in the material bin 20 to the powder paving platform 10, and the powder enters the material leakage base 31 from the material bin 20 and is conveyed to the powder paving platform 10 through the material conveying channel 311; the feeding flashboard 32 is penetrated in the material leakage base 31, and can be controlled by the quantitative driving mechanism 33 to reciprocate relative to the material leakage base 31 and change the opening degree of the material conveying channel 311, so as to control the quantity of the powder output through the material conveying channel 311, thereby realizing the quantitative conveying of the powder through the automatic material leakage mechanism 30. In addition, the quantitative driving mechanism 33 is arranged to automatically drive the feeding flashboard 32 to move and adjust the opening degree of the feeding channel 311, so that not only can the quantitative feeding of powder be effectively realized, but also the waste of the powder caused by excessive feeding or insufficient feeding and the need of secondary feeding can be avoided, and in addition, the appointed printing work can be completed by one-time quantitative feeding, the printing efficiency of 3D printing is improved, and the production efficiency and the quality of the product are both ensured.
Specifically, as shown in fig. 1 to 3, in the powder feeding device of this embodiment, two opposite side edges of the upper top of the bin 20 are provided with bin installation locking blocks 21, when the bin 20 is installed, the bin 20 can be suspended and arranged above the powder paving platform 10 by fixedly connecting the two bin installation locking blocks 21 with a structure in an external environment, and the distance between the bin 20 and the powder paving platform 10 can be adjusted and controlled by adjusting the installation height, so that the powder feeding device is convenient to disassemble and assemble.
In this embodiment, as shown in fig. 2, 3 and 8, the bin 20 includes a feeding chamber 22, a powder supply chamber 23 and a discharge port 231 disposed below the powder supply chamber 23, which are sequentially connected from top to bottom, and the discharge port 231 is communicated with the material conveying channel 311. Wherein, the feeding chamber 22 is used for containing the powder raw material fed into the bin 20, the powder raw material enters the powder supply chamber 23 through the feeding chamber 22, enters the material conveying channel 311 through the discharging hole 231, and is conveyed to the powder paving platform 10, and along with the continuous output of the powder from the discharging hole 231, the powder in the feeding chamber 22 continuously enters the powder supply chamber 23. The above-mentioned bin 20 installs the clamping piece and sets up in the relative both sides portion of throwing material room 22, has offered material volume observation window 232 on the powder supply room 23, and during the use, can observe the volume of powder in the powder supply room 23 through material volume observation window 232, when observing that no powder gets into powder supply room 23 from throwing material room 22, then indicate that throwing material room 22 should be supplemented with the throwing material. So, through setting up the memory space that the material volume observation window 232 can master the interior powder of feed bin 20 at any time, can effectually avoid appearing the circumstances of feed bin 20 outage, timely supplementary powder guarantees the continuity and the stability of print job.
In this embodiment, as shown in fig. 4 to 7, the material leakage base 31 has an upper surface and a lower bottom surface which are oppositely arranged, and a first side edge portion and a second side edge portion which are oppositely arranged, the upper surface is opposite to the material bin 20, and the material conveying channel 311 penetrates through the upper surface and the lower bottom surface, i.e. the material conveying channel 311 is a through hole structure which is arranged on the material leakage base 31, and under the condition that no external structure is blocked, the powder in the material bin 20 can directly pass through the material conveying channel 311 to reach the powder paving platform 10; the first side edge of the leakage base 31 is provided with a penetrating opening 312 through which the feeding gate plate 32 penetrates into the leakage base 31, the first end of the feeding gate plate 32 is suspended in the feeding channel 311 after penetrating through the penetrating opening 312, the second end of the feeding gate plate 32 is located outside the leakage base 31, the quantitative driving mechanism 33 is connected to the second side edge and is used for driving the first end of the feeding gate plate 32 to reciprocate in the feeding channel 311 to change the opening degree of the feeding channel 311, namely, the feeding gate plate 32 traverses the feeding channel 311, and when the first end of the feeding gate plate 32 moves to abut against the side wall of the feeding channel 311, the feeding gate plate 32 can block the feeding channel for blocking the powder, at the moment, the powder is accumulated on the feeding gate plate 32 and cannot be further conveyed, that is, the feeding gate plate 32 divides the feeding channel 311 into a first feeding cavity 3111 accumulated with the powder and a second feeding cavity 3112 into which the powder cannot enter temporarily, and the feeding gate plate 32 is not in this state when the 3D printing work is not performed, so that the powder is prevented from leaking.
Specifically, as shown in fig. 4 to 7, when the printing operation is performed, the quantitative driving mechanism 33 is started to control and drive the feeding gate plate 32 to move relative to the leakage base 31, so that the first end of the feeding gate plate 32 moves to be not abutted against the side wall of the feeding channel 311, a feeding gap 3113 is formed between the first end of the feeding gate plate 32 and the side wall of the feeding channel 311, and the powder in the first feeding cavity 3111 can enter the second feeding cavity 3112 through the feeding gap 3113 and be conveyed onto the powder laying platform 10. More specifically, the quantitative driving mechanism 33 adjusts the size of the feeding gap 3113 formed between the first end of the feeding shutter 32 and the side wall of the feeding channel 311 by driving the feeding shutter 32 to reciprocate relative to the leakage base 31, the opening degree of the feeding channel 311 is adjusted, and the throughput of powder per unit time of the feeding gap 3113 can be calculated, so that the purpose of quantitatively controlling the conveying amount of powder can be achieved. In addition, the quantitative driving mechanism 33 can automatically drive the feeding flashboard 32 to move relative to the material leakage base 31, the change and adjustment of the opening degree of the material conveying channel 311 are quick and flexible, flexible switching of the feeding amount can be realized, and the working efficiency is high.
In this embodiment, as shown in fig. 3,4 and 7, the inner side wall of the feeding channel 311 near the second side edge is concavely formed with a clamping interface 313 for clamping the first end of the feeding gate 32 towards the second side edge, the first end of the feeding gate 32 is driven by the quantitative driving mechanism 33 to be clamped in the clamping interface 313, at this time, the feeding channel 311 is blocked by the feeding gate 32, and the powder is limited in the space above the feeding gate 32 and in the first feeding cavity 3111, i.e. the powder in the bin 20 cannot be conveyed to the powder laying platform 10; or the quantitative driving mechanism 33 drives the first end of the feeding shutter 32 to deviate from the clamping interface 313, at this time, a feeding gap 3113 is formed between the first end of the feeding shutter 32 and the side wall of the feeding channel 311, and the powder can be output through the gap. Specifically, the first end of the feeding gate plate 32 is clamped by the clamping interface 313, so that the sealing degree of powder when the powder is not conveyed can be improved, and fine powder is prevented from leaking out of the abutting gap between the feeding gate plate 32 and the side wall of the material conveying channel 311.
In the present embodiment, as shown in fig. 7, the first end of the feed shutter 32 is provided with a sealing cushion 321, and the sealing cushion 321 is an elastic cushion. That is, when the first end of the feeding gate 32 is clamped into the clamping port 313, the feeding gate 32 presses the sealing buffer pad 321, and the feeding gate 32 presses the sealing buffer pad 321 and elastically deforms the sealing buffer pad 321, so that the feeding channel 311 is better sealed, and the powder is further ensured not to leak.
In this embodiment, as shown in fig. 5 to 7, the quantitative driving mechanism 33 includes a shutter pushing member 331 fixedly connected to the feeding shutter 32 and used for pushing the feeding shutter 32 to move, the shutter pushing member 331 includes a first guide bar 3311, a second guide bar 3312 and a connecting rod 3313 connected between the first guide bar 3311 and the second guide bar 3312, the opposite ends of the leak base 31 are respectively provided with a first guide hole 314 and a second guide hole 315 for the first guide bar 3311 and the second guide bar 3312 to penetrate, and the first guide bar 3311 and the second guide bar 3312 penetrate out of the corresponding first guide hole 314 and the second guide hole 315 and are fixedly connected with the second end of the feeding shutter 32; the first guide bar 3311 reciprocates in the first guide hole 314 along a straight line, the second guide bar 3312 reciprocates in the second guide hole 315 along a straight line, and the first guide bar 3311 and the second guide bar 3312 simultaneously move and drive the feeding gate plate 32 to move, so that the size of a feeding gap 3113 formed between the first end of the feeding gate plate 32 and the side wall of the feeding channel 311 is changed, the opening degree of the feeding channel 311 is changed, and the purpose of adjusting the feeding quantity of powder is achieved.
More specifically, as shown in fig. 3 to 7, the quantitative driving mechanism 33 further includes a driving motor 332 for driving the shutter pushing member 331 to move, a rotary gear 333 is fixed on a power output shaft of the driving motor 332, a shutter pushing rack 334 meshed with the rotary gear 333 is fixed on the connecting rod 3313, and the rotary gear 333 is meshed with the shutter pushing rack 334 to push the connecting rod 3313 to drive the feeding shutter 32 to reciprocate relative to the leakage base 31. When the conveying amount of the powder is required to be adjusted and changed, the driving motor 332 is started to move, the power output shaft of the driving motor 332 drives the rotary gear 333 to rotate, the rotary gear 333 drives the shutter pushing rack 334 meshed with the rotary gear 333 to move, and the shutter pushing rack 334 is fixedly connected with the connecting rod 3313 of the shutter pushing piece 331, so that the shutter pushing rack 334 can drive the whole shutter pushing piece 331 to move, the shutter pushing piece 331 further transmits pushing force to the feeding shutter 32 and enables the feeding shutter 32 to move relative to the material leakage base 31, and therefore, the driving motor 332, the shutter pushing rack 334, the shutter pushing piece 331 and the feeding shutter 32 are linked, and the driving motor 332 is started to move, so that the feeding shutter 32 can be pushed to move. The whole quantitative driving mechanism 33 has ingenious structure and higher matching degree among all the structures, and can realize the adjustment of the powder conveying amount by simply starting the driving motor 332 to operate, thus having strong operability and very convenient use.
More specifically, the driving motor 332 is a stepping motor or a servo motor mounted with a speed reducer (not shown), wherein the stepping motor or the servo motor can rotate at a fixed angle in a certain direction, and when rotating, the power output shaft of the stepping motor or the servo motor rotates at a fixed angle step by step, so that the displacement amount of the feeding shutter 32 can be controlled by controlling the number of pulses, and the displacement amount of the feeding shutter 32 can be controlled, and the rotating speed and the acceleration of the motor can be controlled by controlling the pulse frequency, so that the accurate adjustment of the moving speed of the feeding shutter 32 can be achieved; therefore, the stepping motor or the servo motor is selected to drive the rotary gear 333 to rotate so as to drive the feeding flashboard 32 to move, so that the accuracy of the moving speed and the distance of the feeding flashboard 32 can be better ensured, and the accuracy of quantitative feeding is improved as much as possible. Further, a decelerator is installed on the stepper motor or the servo motor, that is, the decelerator is installed between the prime mover of the stepper motor or the servo motor and the working machine or the actuating mechanism, and the decelerator mainly plays a role of matching the rotation speed and the transmission torque, so that the rotation speed of the stepper motor is reduced, and the torque is increased, so that the driving motor 332 (the stepper motor or the servo motor) can still provide the torque for the feeding shutter 32 to move at a low rotation speed.
More specifically, as shown in fig. 1, 3 and 4, the powder paving platform 10 is provided with the mounting frame 12 for mounting the driving motor 332, the driving motor 332 is mounted on the mounting frame 12, and the mounting frame 12 is further provided with the height adjusting plate 121 for adjusting the mounting height of the driving motor 332, and the mounting height of the driving motor 332 can be adjusted through the height adjusting plate 121, so that the matching degree between the rotating gear 333 and the flashboard pushing rack 334 is better ensured, and the powder quantitative accuracy is ensured.
In the present embodiment, as shown in fig. 5 and 6, a plurality of elastic members 34 are connected between the connecting rod 3313 and the leakage base 31, and the plurality of elastic members 34 are disposed between the connecting rod 3313 and the leakage base 31 at intervals. The elastic member 34 is connected between the connecting rod 3313 and the leakage base 31, and when the driving motor 332 is not started to operate, the elastic member 34 is in a compressed state, at this time, the elastic member 34 in the compressed state generates elastic thrust, and a normal thrust is formed between the gate pushing member 331 and the feeding gate 32, and the normal thrust makes the gate pushing member 331 have a tendency to move in a direction away from the feeding gate 32, so that the first end of the feeding gate 32 is stressed and better clamped in the clamping interface 313, and the sealing effect of the feeding channel 311 is further improved. In addition, the elastic member 34 makes the shutter pushing member 331 have a tendency to move in a direction away from the feeding shutter 32, and can make the shutter pushing rack 334 and the rotating gear 333 in a force engagement state, and the external force can effectively eliminate a return stroke difference of engagement between the gear and the rack, so as to ensure tightness of engagement and ensure accuracy of adjustment of the opening degree of the feeding channel 311.
Specifically, as shown in fig. 5 and 6, the elastic member 34 is preferably a compression spring, a plurality of first compression spring guide posts 341 are disposed on the second side edge of the leakage base 31 at intervals, second compression spring guide posts 342 are disposed on the connecting rod 3313 at intervals, the first compression spring guide posts 341, the compression springs and the second compression spring guide posts 342 are respectively in one-to-one correspondence, and two ends of the compression spring are respectively sleeved on the corresponding first compression spring guide posts 341 and second compression spring guide posts 342. The first pressure spring guide columns 341 and the second pressure spring guide columns 342 which are in one-to-one correspondence are arranged for fixing the pressure springs, so that the pressure springs can be effectively fixed, meanwhile, the compression and the stretching of the pressure springs can be guided, the torsion of the pressure springs is avoided, the feeding flashboard 32 is inclined when moving, and the opening degree of the feeding channel 311 cannot be normally adjusted. And, the pressure spring is evenly arranged between the connecting rod 3313 and the material leakage base 31 to ensure that the driving motor 332 evenly transmits the driving force to the feeding flashboard 32, so that the feeding flashboard 32 is prevented from being inclined in movement due to uneven stress, and the normal operation of quantitative feeding work is ensured.
In this embodiment, as shown in fig. 5 and 7, the powder feeding device further includes a powder guiding mechanism 40, the powder guiding mechanism 40 is fixed on the lower bottom surface of the leakage base 31, the powder laying platform 10 is provided with a scraper 11 capable of moving along the length direction of the powder laying platform 10, the powder inlet of the powder guiding mechanism 40 is communicated with the material conveying channel 311, and the powder outlet of the powder guiding mechanism 40 extends to the moving direction of the scraper 11. A powder guiding mechanism 40 is arranged between the material conveying channel 311 and the powder paving platform 10, powder discharged from the material bin 20 enters the powder guiding mechanism 40 after being discharged through the material conveying channel 311, and then is discharged onto the powder paving platform 10 through the powder guiding mechanism 40, such as the front part (along the moving direction) of the scraper 11, and then the scraper 11 moves along the length direction of the powder paving platform 10, and the powder is uniformly paved on the powder paving platform 10.
Specifically, as shown in fig. 5 and 7, the powder guiding mechanism 40 includes a lower base plate 41 for supporting the powder and an upper cover plate 42 for preventing the powder from lifting, wherein a first end of the lower base plate 41 is fixed on a lower bottom surface of the leakage base 31, the powder is conveyed onto the lower base plate 41 after being output through the material conveying channel 311, and a second end of the lower base plate 41 extends to the right front of the scraper 11 and is used for positioning and conveying the powder to a designated position, so that fixed-point conveying of the powder can be realized, and the accuracy of conveying the powder is improved; the upper cover plate 42 is covered on the lower bottom plate 41 and encloses with the lower bottom plate 41 to form a powder conveying space 43 for conveying powder, and the upper cover plate 42 is arranged to cover the powder, so that fine powder can be effectively prevented from being raised, and waste of the powder and dust pollution to the environment due to the powder are avoided.
In this embodiment, as shown in fig. 3 and 8, the powder feeding device further includes a vibrator 50 for improving the feeding smoothness of the powder, and the vibrator 50 is mounted on the hopper 20. Specifically, the vibrator 50 is mounted on the outer side wall of the powder supply chamber 23 of the bin 20, and when powder is conveyed, the vibrator 50 is started to vibrate to drive the bin 20 to vibrate synchronously, so that the smoothness of discharging of the bin 20 can be improved, and the situation that the powder cannot be conveyed downwards smoothly due to blockage of a discharge hole 231 of the bin 20 or overlarge friction between the bin 20 and the powder is avoided. Specifically, the vibrator 50 here is a vibration motor capable of adjusting the vibration amplitude, or an ultrasonic vibrator 50 whose power can be adjusted.
In this embodiment, as shown in fig. 1 and 2, two sets of bins 20 and automatic material leakage mechanisms 30 with the same structure are provided on the powder paving platform 10, and the two sets of bins 20 and the automatic material leakage mechanisms 30 are symmetrically provided above two opposite sides of the powder paving platform 10, that is, the bins 20 and the automatic material leakage mechanisms 30 are provided on the left and right sides of the powder paving platform 10, that is, the powder feeding device of this embodiment can realize single-side feeding and double-side feeding simultaneously.
Specifically, as shown in fig. 1 to 5, the single-side feeding operation of the powder feeding device of the embodiment is implemented as follows: the automatic material leakage mechanism 30 arranged at the left side (right side) of the powder paving platform 10 conveys the powder in the material bin 20 to the powder paving platform 10, specifically, after the powder is quantitatively output through the material conveying channel 311 of the material leakage base 31, the powder is positioned and output to the right side (left side) of the scraper 11 by the powder guiding mechanism 40, after the powder is conveyed in place, the scraper 11 moves rightwards (leftwards) along the length direction of the powder paving platform 10, and the powder is uniformly paved on the powder paving platform 10 for printing; after printing is completed for one layer, the scraper 11 is returned to the initial position to carry out feeding action of the next round; namely, unilateral feeding needs to be performed by setting printing and feeding intervals, and printing efficiency is difficult to effectively improve.
The implementation process of the bilateral feeding work comprises the following steps: the automatic material leakage mechanism 30 arranged at the left side of the powder paving platform 10 conveys the powder in the storage bin 20 to the powder paving platform 10, specifically, after the powder is quantitatively output through the material conveying channel 311 of the material leakage base 31, the powder is positioned and output to the right side of the scraper 11 by the powder guiding mechanism 40, after the powder is conveyed in place, the scraper 11 moves rightwards along the length direction of the powder paving platform 10, and the powder is uniformly paved on the powder paving platform 10 for printing; when the printer prints, the powder in the bin 20 arranged on the right side of the powder spreading platform 10 is quantitatively output through the corresponding material conveying channel 311 of the material leakage base 31, the powder is positioned and output to the left side of the scraper 11 by the powder guiding mechanism 40, when the printing of the previous round is finished, the scraper 11 moves leftwards, the powder is spread on the powder spreading platform 10 for the printing of the second round, and after the scraper 11 returns to the left initial position, the powder in the left bin 20 is conveyed to the right side of the scraper 11 again to be ready for the printing of the third round; thus, the double-side feeding can realize printing and feeding at the same time, and compared with the printing at the same time, the printing efficiency is higher.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The utility model provides a powder feedway, includes shop's powder platform and is located shop's powder platform's top just is used for holding the feed bin of powder, its characterized in that:
The powder feeding device further comprises an automatic material leakage mechanism for conveying the powder in the bin to the powder paving platform, wherein the automatic material leakage mechanism comprises a material leakage base fixed on the lower bottom surface of the bin, a feeding flashboard penetrating through the material leakage base and a quantitative driving assembly connected with the feeding flashboard;
A material conveying channel for conveying the powder to the powder paving platform is formed in the material leakage base, and the quantitative driving assembly drives the feeding flashboard to reciprocate relative to the material leakage base so as to change the opening degree of the material conveying channel and control the quantity of the powder output through the material conveying channel;
The material leakage base is provided with an upper surface, a lower bottom surface, a first side edge part and a second side edge part, wherein the upper surface and the lower bottom surface are oppositely arranged, the upper surface is opposite to the material bin, the material conveying channel penetrates through the upper surface and the lower bottom surface, the first side edge part of the material leakage base is provided with a penetrating opening for the material feeding flashboard to penetrate into the material leakage base, the first end of the material feeding flashboard penetrates through the penetrating opening and then is suspended in the material conveying channel, the second end of the material feeding flashboard is positioned outside the material leakage base, and the quantitative driving assembly is connected to the second side edge part and is used for driving the first end of the material feeding flashboard to reciprocate in the material conveying channel so as to change the opening degree of the material conveying channel;
the inner side wall, close to the second side edge, of the material conveying channel is concavely provided with a clamping interface for clamping the first end of the feeding flashboard towards the second side edge, the first end of the feeding flashboard is driven by the quantitative driving assembly to be clamped in the clamping interface, or the first end of the feeding flashboard is driven by the quantitative driving assembly to be separated from the clamping interface;
The quantitative driving assembly comprises a flashboard pushing piece which is fixedly connected with the feeding flashboard and used for pushing the feeding flashboard to move, the flashboard pushing piece comprises a first guide strip, a second guide strip and a connecting rod connected between the first guide strip and the second guide strip, two opposite ends of the leakage base are respectively provided with a first guide hole and a second guide hole for the first guide strip and the second guide strip to penetrate, and the first guide strip and the second guide strip penetrate out of the corresponding first guide hole and the second guide hole and are fixedly connected with the second end of the feeding flashboard;
The quantitative driving assembly further comprises a driving motor for driving the flashboard pushing piece to move, a rotary gear is fixed on a power output shaft of the driving motor, a flashboard pushing rack meshed with the rotary gear is fixed on the connecting rod, and the rotary gear is meshed with the flashboard pushing rack to push the connecting rod to drive the feeding flashboard to reciprocate relative to the material leakage base;
A plurality of elastic pieces are connected between the connecting rod and the material leakage base, and the elastic pieces are arranged between the connecting rod and the material leakage base at intervals;
the powder feeding device further comprises a powder guiding mechanism, the powder guiding mechanism is fixed on the lower bottom surface of the material leakage base, a scraper capable of moving along the length direction of the powder paving platform is arranged on the powder paving platform, a powder inlet of the powder guiding mechanism is communicated with the material conveying channel, and a powder outlet of the powder guiding mechanism extends to the moving direction of the scraper.
2. The powder feeding device of claim 1, wherein: the first end of the feeding flashboard is provided with a sealing buffer cushion, and the sealing buffer cushion is an elastic buffer cushion.
3. The powder feeding device of claim 1, wherein: the elastic piece is a pressure spring, a plurality of first pressure spring guide posts are arranged on the second side edge part at intervals, a plurality of second pressure spring guide posts are arranged on the connecting rod at intervals, the first pressure spring guide posts, the pressure springs and the second pressure spring guide posts are respectively in one-to-one correspondence, and two ends of the pressure spring are respectively sleeved on the corresponding first pressure spring guide posts and second pressure spring guide posts.
4. The powder feeding device of claim 1, wherein: the powder feeding device further comprises a vibrator for improving the feeding smoothness of the powder, and the vibrator is mounted on the bin.
5. The powder feeding device according to any one of claims 1 to 4, wherein: the powder paving platform is provided with two groups of storage bins with the same structure and the automatic material leakage mechanisms, and the two groups of storage bins with the automatic material leakage mechanisms are symmetrically arranged above two opposite side parts of the powder paving platform.
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| CN201811036632.8A CN108994297B (en) | 2018-09-06 | 2018-09-06 | Powder feeding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109622961B (en) * | 2018-12-26 | 2023-12-22 | 深圳市圆梦精密技术研究院 | 3D metal printer |
| CN109570505B (en) * | 2018-12-26 | 2023-08-04 | 深圳市圆梦精密技术研究院 | Metal powder feeding device and 3D printer |
| CN111940728B (en) * | 2019-05-17 | 2023-08-25 | 天津斯沃姆科技发展有限公司 | Laser forming equipment and method for additive manufacturing |
| CN112238609A (en) * | 2020-09-17 | 2021-01-19 | 广州海鑫无纺布实业有限公司 | Additive manufacturing laser forming equipment |
| CN112774576A (en) * | 2021-01-05 | 2021-05-11 | 北京新龙立自动化技术有限公司 | Feeding mechanism and dry-process granulator |
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| CN201685457U (en) * | 2010-06-02 | 2010-12-29 | 研能科技股份有限公司 | Stereoscopic forming mechanism |
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| CN102795485A (en) * | 2011-05-26 | 2012-11-28 | 许祥熙 | Machine for automatically filling quantitative powder |
| CN204621074U (en) * | 2015-05-13 | 2015-09-09 | 西安科技大学 | A kind of large scale that is applied to increases the two-way automatic power spreading mechanism that material manufactures forming machine |
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