CN114378313B - Powder falling device for metal 3D printing - Google Patents
Powder falling device for metal 3D printing Download PDFInfo
- Publication number
- CN114378313B CN114378313B CN202111285186.6A CN202111285186A CN114378313B CN 114378313 B CN114378313 B CN 114378313B CN 202111285186 A CN202111285186 A CN 202111285186A CN 114378313 B CN114378313 B CN 114378313B
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- powder
- box body
- powder falling
- metal
- shaft
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- 239000000843 powder Substances 0.000 title claims abstract description 232
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 238000010146 3D printing Methods 0.000 title claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000003638 chemical reducing agent Substances 0.000 claims description 21
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 15
- 229910052731 fluorine Inorganic materials 0.000 claims description 15
- 239000011737 fluorine Substances 0.000 claims description 15
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
-
- 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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
Abstract
The invention provides a powder falling device for metal 3D printing, which comprises a powder storage bin, an adapter plate and a powder box assembly, wherein the powder box assembly comprises a box body and a powder falling shaft, a plurality of powder collecting units which are sequentially and tightly arranged are arranged on the outer side of the powder falling shaft, the box body is a cylinder, the powder collecting units are tangent to the box body, a powder inlet hole and a powder outlet hole are formed in the side face of the cylinder, a powder falling channel is arranged in the adapter plate, the powder storage bin is connected with the powder inlet hole through the powder falling channel, and the powder outlet hole corresponds to a scraper on a powder bed. The open type dovetail groove structure is arranged, so that the disassembly, the assembly and the maintenance are convenient; meanwhile, the sealing devices are arranged at the two ends, so that the sealing effect can be realized, and the phenomenon that the equipment is stopped due to poor sealing and damage to the bearing can be avoided, thereby improving the overall production efficiency.
Description
[ field of technology ]
The invention relates to the technical field of 3D printing, in particular to a powder falling device for metal 3D printing.
[ background Art ]
In existing 3D printing apparatuses, most apparatuses employ a lower powder supply device, i.e. the powder supply device is located below the powder bed, and during the printing of the product, powder is fed into the powder bed layer by layer from below by a piston cylinder. The method has the disadvantages of relatively simple structure, large occupied space, incapability of adding powder in real time when the powder is lacking in the printing process, stop and pressure release for adding powder, inert gas waste, and possible quality problems after the printing is interrupted.
Meanwhile, part of equipment adopts a powder feeding device, namely a powder feeding device is positioned above the powder bed, powder enters the powder feeding device from a powder bin, a powder feeding shaft with a groove is driven by a motor to feed the powder into the powder feeding device, and finally the powder is fed onto the powder bed. In the method, the powder falling precision is poor, the powder falling device is mostly of an integral structure, the powder falling device is difficult to disassemble and assemble and is troublesome to maintain, the sealing effect is poor, powder leakage is caused in the rotation process of the powder falling shaft, and the bearing is damaged.
Accordingly, there is a need to develop a powder dropping device for metal 3D printing to address the deficiencies of the prior art to solve or mitigate one or more of the problems described above.
[ invention ]
In view of the above, the invention provides a powder falling device for metal 3D printing, which is provided with an open dovetail groove structure, and is convenient to assemble, disassemble and maintain; meanwhile, the sealing devices are arranged at the two ends, so that the sealing effect can be realized, and the phenomenon that the equipment is stopped due to poor sealing and damage to the bearing can be avoided, thereby improving the overall production efficiency.
In one aspect, the invention provides a powder falling device for metal 3D printing, which comprises a powder storage bin, an adapter plate and a powder box assembly, wherein the powder box assembly comprises a box body and a powder falling shaft, a plurality of powder collecting units which are sequentially and tightly arranged are arranged on the outer side of the powder falling shaft, the box body is a cylinder, the powder collecting units are tangent to the box body, a powder inlet hole and a powder outlet hole are formed in the side face of the cylinder, a powder falling channel is arranged in the adapter plate, and the powder storage bin is connected with the powder inlet hole through the powder falling channel.
In the aspect and any possible implementation manner, there is further provided an implementation manner, the box body and the powder falling shaft coaxially and asynchronously rotate, the powder collecting unit is in an arc structure, and the arc corresponding to the arc structure is (0 degree, 180 degrees).
As described above, in one aspect and any one of the possible implementation manners, there is further provided an implementation manner, a top of the powder storage bin is connected to a top plate of the 3D printing part forming chamber, a bottom of the powder storage bin is connected to the adapter plate, and a straight slot hole is arranged at a central position of the bottom of the powder storage bin and connected to the powder falling channel.
As described above, in one aspect and any possible implementation manner, there is further provided an implementation manner, the powder dropping device for metal 3D printing further includes a clamping plate, one end of the powder dropping channel disposed in the adapter plate is a cylindrical head counter-sunk hole, and is used for being screwed and fixed at the bottom of the Chu Fencang, one side of the adapter plate is further provided with an open dovetail groove structure, an opening of the open dovetail groove structure is connected with the clamping plate, so as to form a complete dovetail groove structure, and after the powder box assembly is inserted into the adapter plate, the powder box assembly is compressed by the clamping plate and fixed by a screw.
In the aspects and any possible implementation manner described above, there is further provided an implementation manner, where the powder box assembly further includes a bearing one and a bearing seat, the top of the box body is inserted in the adapter plate and fixed on the side surface by the clamping plate, the powder falling shaft is sleeved inside the box body, two ends of the powder falling shaft extend out of the box body, one end of the powder falling shaft extending out is installed on an inner ring of the bearing one, and the bearing one is installed in the bearing seat.
The powder box assembly further comprises a second bearing, the bearing seat is fixedly connected to one end face of the box body in a threaded mode, the other end, extending out of the powder falling shaft, of the powder falling shaft is installed on the inner ring of the second bearing, and the rectangular connecting plate is fixedly connected to the other end face of the box body in a threaded mode.
As described above and any possible implementation manner, there is further provided an implementation manner, where the powder dropping device for metal 3D printing further includes a rectangular connecting plate, a rectangular connecting plate counter bore is formed on the rectangular connecting plate, and the second bearing is installed in the rectangular connecting plate counter bore.
As described above, in one aspect and any possible implementation manner, there is further provided an implementation manner, the powder setting device for metal 3D printing further includes a metal seal ring seat and a fluorine rubber seal ring, the metal seal ring seat is sleeved outside the fluorine rubber seal ring, the fluorine rubber seal ring is installed on the powder setting shaft, and the metal seal ring seat is sleeved on the outer circle and tangent to the interior of the box body.
As described above, in any one of the possible implementation manners, there is further provided an implementation manner, the bottom surface of the box body is provided with a powder falling boss, the boss is provided with a straight slot hole and connected with the powder outlet hole, and one side surface of the box body is provided with two through holes for installation and positioning of the metal sealing ring.
As described above, in one aspect and any possible implementation manner, there is further provided an implementation manner, the powder dropping device for metal 3D printing further includes a transmission mechanism, the transmission mechanism includes a motor, a speed reducer, a pulley set and a synchronous belt, the motor is installed on the speed reducer, the speed reducer is screwed and fixed on the rectangular connecting plate, and an output shaft of the speed reducer is connected with the powder dropping shaft through the pulley set and the synchronous belt.
Compared with the prior art, the invention can obtain the following technical effects:
1. the adapter plate and the clamping plate are combined into a detachable dovetail groove structure, so that the powder falling device is convenient to disassemble, assemble and maintain;
2. the sealing structures at the two ends of the powder falling shaft are utilized, so that the powder leakage phenomenon can be avoided;
3. powder can be sent to a powder bed by utilizing the straight slot holes on the powder storage bin, the adapter plate and the box body and the rotation of the powder falling shaft 42;
4. utilize the powder boss that falls of box body bottom surface, can fall the powder accuracy in the scraper on the powder bed, can improve shop powder precision, and then improve the printing precision of equipment.
Of course, it is not necessary for any of the products embodying the invention to achieve all of the technical effects described above at the same time.
[ description of the 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 will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural perspective view of a powder dropping device of a 3D printing apparatus according to an embodiment of the present invention;
fig. 2 is a left side cross-sectional view of a powder dropping device of a 3D printing apparatus according to an embodiment of the present invention;
fig. 3 is a front cross-sectional view of a powder box component in a powder dropping device structure of a 3D printing apparatus according to an embodiment of the present invention.
Wherein, in the figure:
1. a powder storage bin; 2. an adapter plate; 3. a clamping plate; 4. a powder box assembly; 5. a transmission mechanism; 6. a rectangular connecting plate; 7. a sealing mechanism; 41. a case body; 42. a powder falling shaft; 43. a first bearing; 44. a second bearing; 45. a bearing seat; 51. a motor; 52. a speed reducer; 53. a synchronous belt wheel set; 54 a synchronous belt; 71. a metal seal ring seat; 72. and (3) a fluorine rubber sealing ring.
[ detailed description ] of the invention
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are only some of the embodiments of the present invention and not all other embodiments that are obtained under the full inventive faculty fall within the scope of the present invention.
Embodiments of the surgical section used in embodiments of the present invention. Based on the embodiments of the present invention, one of ordinary skill in the art will recognize that no language is used for the description of the specific embodiments and the intention is not to limit the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention provides a powder falling device for metal 3D printing, which is provided with an open type dovetail groove structure, and is convenient to assemble, disassemble and maintain; meanwhile, the sealing devices are arranged at the two ends, so that the sealing effect can be realized, and the phenomenon that the equipment is stopped due to poor sealing and damage to the bearing can be avoided, thereby improving the overall production efficiency. The powder falling device for metal 3D printing comprises a powder storage bin, an adapter plate and a powder box assembly, wherein the powder box assembly comprises a box body and a powder falling shaft, a plurality of powder collecting units which are closely arranged in sequence are arranged on the outer side of the powder falling shaft, the box body is a cylinder, the powder collecting units are tangent to the box body, a powder inlet hole and a powder outlet hole are formed in the side face of the cylinder, a powder falling channel is arranged in the adapter plate, the powder storage bin is connected with the powder inlet hole through the powder falling channel, and the powder outlet hole corresponds to a scraper on a powder bed. The powder collecting unit is of an arc structure, the arc corresponding to the arc structure is (0 degree, 180 degrees) in size, the top of the powder storage bin is connected with the top plate of the 3D printing part forming chamber, the bottom of the powder storage bin is connected with the adapter plate, a straight slot hole is arranged at the center of the bottom of the powder storage bin and is connected with a powder falling channel, the powder falling device for metal 3D printing further comprises a clamping plate and a rectangular connecting plate, one end of the powder falling channel arranged in the adapter plate is a cylindrical head counter bore and is used for being screwed and fixed at the bottom of Chu Fencang, one side of the adapter plate is further provided with an open dovetail groove structure, the opening of the open dovetail groove structure is connected with the clamping plate to form a complete dovetail groove structure, after the powder box assembly is inserted into the adapter plate, the powder box assembly is pressed by the clamping plate and is fixed by a screw, the powder box assembly further comprises a bearing I and a bearing seat, the powder box component also comprises a bearing II which is in threaded connection with one end face of the box body, the other end of the powder falling shaft which extends out is arranged in the inner ring of the bearing II, the rectangular connecting plate is in threaded connection with the other end face of the box body, a rectangular connecting plate countersink is arranged on the rectangular connecting plate, the bearing II is arranged in the rectangular connecting plate countersink, the metal sealing ring seat is sleeved outside the fluorine rubber sealing ring, the fluorine rubber sealing ring is installed on the powder falling shaft, and the metal sealing ring seat is sleeved on the outer circle and tangent to the inside of the box body. The powder discharging box comprises a box body and is characterized in that a powder discharging boss is arranged on the bottom surface of the box body, a straight slot hole is arranged on the boss and connected with a powder discharging hole, and two through holes are formed in one side surface of the box body and used for installing and positioning the metal sealing ring. The powder falling device for metal 3D printing further comprises a transmission mechanism, the transmission mechanism comprises a motor, a speed reducer, a belt pulley set and a synchronous belt, the motor is installed on the speed reducer, the speed reducer is fixedly connected to the rectangular connecting plate in a threaded mode, and an output shaft of the speed reducer is connected with the powder falling shaft through the belt pulley set and the synchronous belt.
The invention relates to a powder falling device for metal 3D printing, which comprises a powder storage bin 1, an adapter plate 2, a powder box assembly 4, a clamping plate 3, a rectangular connecting plate 6, a sealing mechanism 7 and a transmission mechanism 5, wherein the top of the powder storage bin 1 is connected with a top plate of a forming chamber, and the bottom of the powder storage bin 1 is connected with the adapter plate 2; the powder box assembly 4 comprises a box body 41, a powder falling shaft 42, a first bearing 43, a second bearing 44 and a bearing seat 45, wherein the top of the box body 41 is inserted into the adapter plate 2 and is fixed on the side surface by the clamping plate 3, the powder falling shaft 42 is sleeved in the box body 41, two ends of the powder falling shaft 42 extend out of the box body 41, one end of the powder falling shaft 42 extending out is installed in an inner ring of the first bearing 43, the first bearing 43 is installed in the bearing seat 45, the bearing seat 45 is fixedly connected with one end face of the box body 41 in a threaded manner, the other end of the powder falling shaft 42 extending out is installed in the inner ring of the second bearing 44, the second bearing 44 is installed in a countersunk hole of the rectangular connecting plate 6, and the rectangular connecting plate 6 is fixedly connected with the other end face of the box body 41 in a threaded manner; the sealing mechanism 7 comprises a metal sealing ring seat 71 and a fluorine rubber sealing ring 72, the metal sealing ring seat 71 is sleeved outside the fluorine rubber sealing ring 72, the fluorine rubber sealing ring 72 is arranged on the powder falling shaft 42, and the metal sealing ring seat 71 is sleeved on the outer circle and tangent to the inside of the box body 41 so as to achieve a sealing effect; the transmission mechanism 5 comprises a motor 51, a speed reducer 52, a belt pulley group and a synchronous belt 54, wherein the motor 51 is arranged on the speed reducer 52, the speed reducer 52 is fixedly connected to the rectangular connecting plate 6 in a threaded manner, and an output shaft of the speed reducer 52 is connected with the powder falling shaft 42 through the belt pulley group and the synchronous belt 54 to provide rotary power for the powder falling shaft;
preferably, a cylindrical head counter bore is formed in the adapter plate 2 and is used for being screwed and fixed at the bottom of the Chu Fen bin 1, the adapter plate 2 is provided with an open dovetail groove structure and forms a complete dovetail groove structure with the clamping plate 3, and after the powder box assembly 4 is inserted into the adapter plate 2, the powder box assembly is compressed by the clamping plate 3 and fixed by a screw;
preferably, a straight slot hole is arranged at the center of the bottom of the powder storage bin 1;
preferably, a straight slot hole is formed in the center of the top surface of the adapter plate 2, and sealing grooves are formed in the periphery of the straight slot hole and are used for installing sealing rings to avoid powder leakage;
preferably, the top surface of the box 41 is provided with a straight slot for powder falling; a cylindrical hole is formed in the middle of the box body 41, and the center line of the cylindrical hole coincides with the center line of the powder falling shaft 42; the bottom surface of the box body 41 is provided with a powder falling boss, and the boss is provided with a straight slot hole, so that the powder falling precision is improved; two through holes are formed in one side surface of the box body 41 and used for mounting and positioning the metal sealing ring;
preferably, the metal seal ring seat 71 is provided with a threaded hole in the circumferential direction, the center line of the threaded hole coincides with the center line of the through hole of the box 41, and the metal seal ring seat is installed and positioned by a positioning screw;
preferably, the center lines of the straight slot holes on the top surfaces of the powder storage bin 1, the adapter plate 2 and the box body 41 are on the same vertical surface;
in a specific embodiment, the adapter plate 2 is provided with a positioning hole, so that the clamping plate 3 is convenient to install;
as shown in fig. 1, the invention provides a powder falling device for metal 3D printing, which comprises a powder storage bin 1, an adapter plate 2, a powder box assembly 4, a clamping plate 3, a rectangular connecting plate 6, a sealing mechanism 7 and a transmission mechanism 5. The powder storage bin 1 is of a thin-wall structure, and the top of the powder storage bin 1 is connected with the top plate of the forming chamber; the adapter plate 2 is internally provided with a cylindrical head counter-sunk hole which is used for being screwed and fixed at the bottom of the powder storage bin 1, the adapter plate 2 is provided with an open type dovetail groove structure, and the adapter plate is screwed and connected with the clamping plate 3 to form a complete dovetail groove structure;
as shown in fig. 2 and 3, the powder box assembly 4 comprises a box body 41, a powder falling shaft 42, a first bearing 43, a second bearing 44 and a bearing seat 45, wherein the top of the box body 41 is inserted into the adapter plate 2, the powder falling shaft 42 is sleeved in the box body 41 and is screwed and fixed on the side surface of the adapter plate 2 by using a clamping plate 3, the center line of the powder falling shaft coincides with the center line of the inner circle of the box body 41, two ends of the powder falling shaft 42 extend out of the box body 41, one end of the extending end is arranged on the inner circle of the first bearing 43, the first bearing 43 is arranged in the bearing seat 45, the bearing seat 45 is screwed and fixed on one end surface of the box body 41, the other end of the extending end of the powder falling shaft 42 is arranged on the inner circle of the second bearing 44, the second bearing 44 is arranged in a countersunk hole of the rectangular connecting plate 6, and the rectangular connecting plate 6 is screwed and fixed on the other end surface of the box body 41;
the sealing mechanism 7 comprises a metal sealing ring seat 71 and a fluorine rubber sealing ring 72, wherein the metal sealing ring seat 71 is sleeved outside the fluorine rubber sealing ring 72, the fluorine rubber sealing ring 72 is arranged on the shaft shoulder of the powder falling shaft 42, and the metal sealing ring seat 71 is sleeved on the outer circle and tangent to the inside of the box body 41 so as to achieve the sealing effect;
the transmission mechanism 5 comprises a motor 51, a speed reducer 52, a belt pulley group and a synchronous belt 54, wherein the motor 51 is arranged on the speed reducer 52, the speed reducer 52 is fixedly connected to the rectangular connecting plate 6 in a threaded manner, and an output shaft of the speed reducer 52 is connected with the powder falling shaft 42 through the belt pulley group and the synchronous belt 54 to provide rotary power for the powder falling shaft.
The powder falling process is as follows: powder in the powder storage bin 1 enters the groove of the powder falling shaft 42 in the box body 41 through the straight groove hole under the action of gravity, the powder falling shaft is tangent to the inner circle of the box body 41, the powder is ensured to exist in the groove of the powder falling shaft, the motor 51 drives the powder falling shaft 42 to rotate through the synchronous belt 54 wheel under the action of the transmission mechanism 5, and the powder is accurately fallen into the scraper on the powder bed from the boss straight groove hole at the bottom of the box body 41.
The powder falling device for metal 3D printing provided by the embodiment of the application is described in detail above. The above description of embodiments is only for aiding in understanding the method of the present application and its core ideas; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As referred to throughout the specification and claims, the terms "comprising," including, "and" includes "are intended to be interpreted as" including/comprising, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect. The description hereinafter sets forth the preferred embodiment for carrying out the present application, but is not intended to limit the scope of the present application in general, for the purpose of illustrating the general principles of the present application. The scope of the present application is defined by the appended claims.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that this application is not limited to the forms disclosed herein, but is not to be construed as an exclusive use of other embodiments, and is capable of many other combinations, modifications and environments, and adaptations within the scope of the teachings described herein, through the foregoing teachings or through the knowledge or skills of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.
Claims (4)
1. The powder falling device for metal 3D printing is characterized by comprising a powder storage bin, an adapter plate and a powder box assembly, wherein the powder box assembly comprises a box body and a powder falling shaft, a plurality of powder collecting units which are sequentially and tightly arranged are arranged on the outer side of the powder falling shaft, the box body is a cylinder, the powder collecting units are tangent to the box body, a powder inlet hole and a powder outlet hole are formed in the side face of the cylinder, a powder falling channel is arranged in the adapter plate, and the powder storage bin is connected with the powder inlet hole through the powder falling channel;
the powder collecting unit is of an arc structure, and the arc corresponding to the arc structure is larger than 0 degrees and not larger than 180 degrees;
the top of the powder storage bin is connected with the top plate of the 3D printing part forming chamber, the bottom of the powder storage bin is connected with the adapter plate, a straight slot hole is formed in the center of the bottom of the powder storage bin, and the straight slot hole is connected with the powder falling channel;
the powder falling device for metal 3D printing further comprises a clamping plate, one end of a powder falling channel arranged in the adapter plate is a cylindrical head countersunk hole and is used for being fixedly connected to the bottom of the Chu Fencang in a screwed mode, one side of the adapter plate is further provided with an open type dovetail groove structure, the opening of the open type dovetail groove structure is connected with the clamping plate to form a complete dovetail groove structure, and after the powder box assembly is inserted into the adapter plate, the powder box assembly is compressed by the clamping plate and is fixed by a screw;
the powder box assembly further comprises a first bearing and a bearing seat, the top of the box body is inserted into the adapter plate and fixed on the side face by the clamping plate, the powder falling shaft is sleeved into the box body, two ends of the powder falling shaft extend out of the box body, one end of the powder falling shaft extending out is arranged on an inner ring of the first bearing, and the first bearing is arranged in the bearing seat;
the powder box assembly further comprises a second bearing, the bearing seat is fixedly connected to one end face of the box body in a threaded mode, and the other end, extending out of the powder falling shaft, of the powder falling shaft is arranged on an inner ring of the second bearing;
the powder falling device for metal 3D printing further comprises a rectangular connecting plate, wherein the rectangular connecting plate is fixedly connected to the other end face of the box body in a threaded manner, a rectangular connecting plate countersink is formed in the rectangular connecting plate, and a second bearing is arranged in the rectangular connecting plate countersink;
powder in a powder storage bin of the powder falling device for metal 3D printing falls into a groove of a powder falling shaft in a box body through a straight groove hole under the action of gravity, the powder falling shaft is tangent to a circle in the box body, the powder is guaranteed to exist in the groove of the powder falling shaft, a motor is driven to rotate through a synchronous pulley under the action of a transmission mechanism, and the powder is accurately fallen into a scraper on a powder bed from a boss straight groove hole at the bottom of the box body.
2. The powder falling device for metal 3D printing according to claim 1, further comprising a metal seal ring seat and a fluorine rubber seal ring, wherein the metal seal ring seat is sleeved outside the fluorine rubber seal ring, the fluorine rubber seal ring is installed on the powder falling shaft, and the metal seal ring seat is sleeved on the outer circle and tangent to the inside of the box body.
3. The powder falling device for metal 3D printing according to claim 2, wherein a powder falling boss is arranged on the bottom surface of the box body, a straight slot hole is arranged on the boss and connected with the powder outlet, and two through holes are arranged on one side surface of the box body and used for installing and positioning the metal sealing ring.
4. The powder falling device for metal 3D printing according to claim 1, further comprising a transmission mechanism, wherein the transmission mechanism comprises a motor, a speed reducer, a belt pulley set and a synchronous belt, the motor is installed on the speed reducer, the speed reducer is fixedly connected to the rectangular connecting plate in a threaded manner, and an output shaft of the speed reducer is connected with the powder falling shaft through the belt pulley set and the synchronous belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285186.6A CN114378313B (en) | 2021-11-01 | 2021-11-01 | Powder falling device for metal 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285186.6A CN114378313B (en) | 2021-11-01 | 2021-11-01 | Powder falling device for metal 3D printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114378313A CN114378313A (en) | 2022-04-22 |
| CN114378313B true CN114378313B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111285186.6A Active CN114378313B (en) | 2021-11-01 | 2021-11-01 | Powder falling device for metal 3D printing |
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| CN (1) | CN114378313B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177818A (en) * | 1991-12-26 | 1993-07-20 | Itasaka Masao | Powder spreading device of printing machine |
| CN105598451A (en) * | 2016-03-01 | 2016-05-25 | 西安铂力特激光成形技术有限公司 | Additive manufacturing powder discharging device |
| CN206633416U (en) * | 2017-03-17 | 2017-11-14 | 南京增材制造研究院发展有限公司 | A kind of 3D printing powder feeding and spreading coordinated type two-way powder laying device and equipment |
| CN208644071U (en) * | 2018-08-10 | 2019-03-26 | 天津易博三维科技有限公司 | Metal increasing material manufacturing quantifies powder falling mechanism |
| CN111659890A (en) * | 2020-07-06 | 2020-09-15 | 苏州三峰激光科技有限公司 | Metal 3D prints and spreads powder device |
-
2021
- 2021-11-01 CN CN202111285186.6A patent/CN114378313B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177818A (en) * | 1991-12-26 | 1993-07-20 | Itasaka Masao | Powder spreading device of printing machine |
| CN105598451A (en) * | 2016-03-01 | 2016-05-25 | 西安铂力特激光成形技术有限公司 | Additive manufacturing powder discharging device |
| CN206633416U (en) * | 2017-03-17 | 2017-11-14 | 南京增材制造研究院发展有限公司 | A kind of 3D printing powder feeding and spreading coordinated type two-way powder laying device and equipment |
| CN208644071U (en) * | 2018-08-10 | 2019-03-26 | 天津易博三维科技有限公司 | Metal increasing material manufacturing quantifies powder falling mechanism |
| CN111659890A (en) * | 2020-07-06 | 2020-09-15 | 苏州三峰激光科技有限公司 | Metal 3D prints and spreads powder device |
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| CN114378313A (en) | 2022-04-22 |
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