CN111266582A

CN111266582A - Quantitative powder falling structure suitable for metal additive manufacturing

Info

Publication number: CN111266582A
Application number: CN202010221723.XA
Authority: CN
Inventors: 朱岩; 杨凯; 于妍; 李道杰; 丁亮; 罗汉; 余里成; 刘萌
Original assignee: Hunan Vanguard Group Co ltd
Current assignee: Hunan Vanguard Group Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-12

Abstract

The invention relates to the field of metal additive manufacturing, in particular to a quantitative powder falling structure suitable for metal additive manufacturing. The quantitative powder dropping structure comprises a powder cavity assembly and a powder dropping roller assembly from top to bottom, the quantitative powder dropping structure is suitable for metal additive manufacturing, the structure is simple, the assembly, the disassembly and the powder cleaning are convenient, the powder changing efficiency is improved, the powder dropping ports are staggered to prevent powder from leaking directly, the powder dropping amount can be adjusted in real time, the rotating state of the powder dropping roller is fed back, the situation that the powder dropping roller is stuck and the powder dropping printing continues is prevented, the inert gas protection is provided, and the powder dropping and changing efficiency and the safety are improved through the whole structure; in addition, the metal powder for additive manufacturing needs to be isolated from air, so that the air tightness of the quantitative powder falling device has higher requirement.

Description

Quantitative powder falling structure suitable for metal additive manufacturing

Technical Field

The invention relates to the field of metal additive manufacturing, in particular to a quantitative powder falling structure suitable for metal additive manufacturing.

Background

The selective laser melting process is to adopt the slicing treatment of the part, the three-dimensional entity is degraded to the two-dimensional section treatment, each layer thickness represents a section, and one layer is descended after each layer is sintered or melted by laser and then one layer is laid until the whole part is molded.

The powder structure that falls on metal vibration material disk that has disclosed, most structure is complicated, and the leakproofness is good and leak the powder easily, and whole powder structure that falls dismantles the installation inconvenient, and the clear powder of self dismantlement is maintained also more loaded down with trivial details, does not possess the unusual feedback of shop's powder roller state simultaneously.

Disclosure of Invention

In order to solve the above problems, the first aspect of the present invention provides a powder quantitative falling structure, which comprises, from top to bottom, a powder chamber assembly and a powder falling roller assembly, wherein the powder chamber assembly comprises a powder barrel and a powder chamber, and the lower part of the powder barrel and the upper part of the powder chamber are connected through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder chamber below is fixed with the last powder base that falls, the powder chamber is hollow structure, and the powder chamber below is equipped with the powder mouth that falls in the powder chamber, the powder roller that falls that goes up the powder base and run through from top to bottom advances the powder mouth, the powder roller that falls advances powder mouth one end and connects the powder chamber and fall the powder mouth, and the upper left side of the powder roller that falls is connected to the other end, the powder roller that falls that the powder base is equipped with runs through from top to bottom goes out the powder mouth, the powder roller that falls goes out powder mouth one end and the powder roller that falls right side below is connected.

As a preferable technical scheme, the left end of the powder dropping roller is provided with a powder dropping collision block, the left end of the powder feeding base is provided with a collision sensor, and when the powder dropping collision block rotates along with the powder dropping roller, the powder dropping collision block collides with the collision sensor.

As a preferable technical scheme, bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, and the bearing seats are detachably connected with the powder dropping base.

As a preferable technical scheme of the invention, a bearing is arranged between the bearing seat and the powder dropping roller.

As a preferable technical scheme of the invention, the inner side of the bearing is sealed by a cover and a powder dropping roller.

As a preferable technical scheme of the invention, a positioning key is arranged below the powder falling base and is used for positioning with the cavity.

As a preferable technical scheme, a feeding level sensor is arranged above the powder cavity side, and a discharging level sensor is arranged below the powder cavity side.

As a preferable technical scheme of the invention, an inert gas interface is arranged above the powder cavity.

As a preferable technical scheme, an aviation plug is arranged on the powder falling roller assembly, and leads of the impact sensor, the feeding level sensor and the discharging level sensor are concentrated in the aviation plug.

As a preferable technical scheme of the invention, the left end and the right end of the powder cavity are symmetrically provided with handles.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a quantitative powder dropping structure suitable for metal additive manufacturing, which is simple in structure, convenient to assemble, disassemble and clean, and capable of improving powder changing efficiency, wherein upper powder ports and lower powder ports are staggered to prevent powder from leaking directly, the powder dropping amount can be adjusted in real time, the rotating state of a powder dropping roller is fed back, the situation that the powder dropping roller is stuck and has no continuous powder dropping printing is prevented, inert gas protection is provided, and the efficiency and the safety of powder dropping and changing are improved through the whole structure; in addition, the metal powder for additive manufacturing needs to be isolated from air, so that the air tightness of the quantitative powder falling device has higher requirement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic front view of the quantitative powder falling structure.

FIG. 2 is an enlarged schematic view of the powder dropping roller assembly.

FIG. 3 is a side cross-sectional view of the quantitative drop structure.

FIG. 4 is a partially enlarged side sectional view of the quantitative powdering structure.

Fig. 5 is a schematic structural diagram of the quantitative powder falling structure.

Fig. 6 is a partially enlarged view of the quantitative powdering structure.

Wherein, 1-powder falling roller component, 2-powder cavity component, 1-1-powder falling roller, 1-2-powder falling base, 1-3-bearing seat, 1-4-positioning key, 1-5-sealing cover, 1-6-felt, 1-7-bearing sealing ring, 1-8-lip sealing ring, 1-9-bearing, 1-10-powder falling collision block, 1-11-collision sensor, 1-12-sensor fixing piece, 1-13-coupler, 1-14-servo motor, 1-15-base sealing ring, 1-16-sealing strip, 1-17-pin, 1-18-screw, 1-19-sheet metal part, 1-20-aviation plug, 2-1-powder cavity, 2-2-handle, 2-3-blanking position sensor, 2-4-loading position sensor, 2-5-upper cover plate, 2-6-inert gas interface, 2-7-powder barrel, 1-201-upper powder-dropping base and 1-202-lower powder-dropping base.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention is illustrated by the following specific embodiments, but is not limited to the specific examples given below.

The invention provides a quantitative powder falling structure suitable for metal additive manufacturing, which comprises a powder cavity assembly and a powder falling roller assembly from top to bottom, wherein the powder cavity assembly comprises a powder barrel and a powder cavity, and the lower part of the powder barrel and the upper part of the powder cavity are connected through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder chamber below is fixed with the last powder base that falls, the powder chamber is hollow structure, and the powder chamber below is equipped with the powder mouth that falls in the powder chamber, the powder roller that falls that goes up the powder base and run through from top to bottom advances the powder mouth, the powder roller that falls advances powder mouth one end and connects the powder chamber and fall the powder mouth, and the upper left side of the powder roller that falls is connected to the other end, the powder roller that falls that the powder base is equipped with runs through from top to bottom goes out the powder mouth, the powder roller that falls goes out powder mouth one end and the powder roller that falls right side below is connected.

In one embodiment, the powder falling roller is provided with a groove.

In one embodiment, the upper and lower powder bases are fixedly sealed by screws and sealing strips.

In one embodiment, the powder chamber assembly and the powder dropping roller assembly are fixedly sealed by screws and sealing rings.

In one embodiment, the left end of the powder dropping roller is provided with a powder dropping collision block, the left end of the powder feeding base is provided with a collision sensor, and when the powder dropping collision block rotates along with the powder dropping roller, the powder dropping collision block collides with the collision sensor.

In one embodiment, the impact sensor is fixed at the left end of the upper powder dropping base through a sensor fixing piece.

In one embodiment, a positioning key is arranged below the powder falling base and used for positioning with the cavity.

In one embodiment, the powder falling base and the cavity are hermetically fixed through a screw and a base sealing ring.

In one embodiment, the powder outlet of the powder dropping roller is communicated with the interior of the cavity.

The applicant assembles the powder chamber assembly and the powder dropping roller assembly to enable powder to enter the powder dropping roller assembly from a charging barrel of the powder chamber assembly through a powder chamber, wherein, the powder inlet of the powder falling roller and the powder outlet of the powder falling roller are arranged in a staggered structure, so that the powder leakage caused by the straight-through powder falling can be prevented, the powder entering the powder falling roller from the powder inlet of the powder falling roller drives the powder falling roller to rotate through the servo motor and the coupler, the powder is conveyed to fall by the groove structure of the powder falling roller, and enters the cavity through the powder outlet of the powder falling roller, in the process, the rotation turns of the powder falling roller are set through the servo motor to quantitatively adjust the powder falling amount, and whether the actual number of turns of the powder falling roller is consistent with the set number of turns is reflected by the number of times of impact between the powder falling impact block and the impact sensor, and an alarm signal is output when the actual number of turns of the powder falling roller is not consistent with the set number of turns, the safety risk that the additive manufacturing process is still resumed due to no signal output and no powder falling when the powder falling roller is stuck can be avoided. In addition, through the location key location, can fix a position powder structure and cavity fast to sealed fixed through screw and sealing washer, avoid metal powder and external gas to contact.

In one embodiment, bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, and the bearing seats and the powder dropping base are detachably connected.

The invention does not limit the concrete connection mode of the powder falling structure, and can be used for detachable connection, such as screw connection, key connection, pin connection and clamping connection; non-detachable connections, such as welding, gluing.

In one embodiment, the bearing seat and the powder dropping base are positioned and fixed through pins and screws.

In one embodiment, the bearing seat and the powder falling base are positioned and fixed through 4 pins and 4 screws.

In one embodiment, a bearing is arranged between the bearing seat and the powder falling roller.

In one embodiment, the inside of the bearing is sealed by a cover and a dusting roller.

In one embodiment, the bearing and the cover are sealed by a lip seal.

In one embodiment, the cover and the powder falling base are sealed through felt.

In one embodiment, the bearing seat and the powder falling roller are sealed through a bearing sealing ring.

In order to avoid dust leakage, the applicant sets a powder spreading roller, an upper powder falling base and a lower powder foundation base which are of symmetrical structures in a powder falling roller assembly, the two powder falling bases are installed in a staggered mode and fixed with each other through screws, the middle of the powder falling roller is sealed through sealing strips, bearing seats are arranged at the left end and the right end of the powder falling roller, bearings and lip-shaped sealing rings are installed on the inner sides of the bearing seats and used for rotating and dustproof sealing, four pins and the powder falling bases are used for fast positioning on the outer sides of the bearing seats, the four screws are used for fixing the powder falling bases, and the bearing sealing rings. In addition, in order to avoid the outflow of powder of the powder dropping roller, the applicant also arranges sealing covers between the bearing and the powder dropping roller, the sealing covers are fixed at two ends of the powder dropping roller and are used for sealing the powder in the grooves of the powder dropping roller to prevent the outflow of the powder, and meanwhile, a seal is formed between the upper felt and the lower felt and the sealing covers to prevent the outflow of the powder, so that the leakage of the powder is further avoided.

In one embodiment, a feeding level sensor is arranged above the powder cavity side, and a discharging level sensor is arranged below the powder cavity side.

In one embodiment, the number of fill level sensors is selected from one of 1, 2, 3, and 4.

In one embodiment, the number of the feed level sensors is selected from one of 1, 2, 3 and 4.

In one embodiment, an inert gas port is provided above the powder chamber.

In one embodiment, handles are symmetrically arranged at the left end and the right end of the powder cavity.

In one embodiment, the handle and the powder chamber are fixed by a sealing gasket and a screw.

In one embodiment, an upper cover plate is arranged above the powder cavity, the upper cover plate and the powder cavity are sealed through a sealing ring, and an inert gas interface is arranged on the upper cover plate.

In one embodiment, the powder barrel and the upper cover plate are connected through a vacuum butterfly valve and a pipeline.

The applicant connects the powder barrel and the powder cavity through the vacuum butterfly valve and the pipeline, powder can be added under the condition of not interrupting additive manufacturing, and the powder quantity in the powder cavity can be fed back by arranging the upper and lower material level sensors outside the powder cavity, so that quantitative powder falling is realized; in addition, the applicant sets up the inert gas interface above the powder chamber, can provide gas protection, simple structure, easy dismounting.

In one embodiment, an aviation plug is arranged on the powder falling roller assembly, and the wires of the impact sensor, the feeding level sensor and the discharging level sensor are concentrated in the aviation plug.

In one embodiment, the aviation plug is fixed on the powder dropping roller assembly through a sheet metal part.

The applicant can realize simple disassembly and assembly by reasonably designing the structure of the quantitative powder dropping structure, wherein the powder chamber component can be conveniently and quickly taken down from the powder dropping roller component by arranging symmetrical handles outside the powder chamber; when the powder falling roller assembly is dismounted, the servo motor and the coupler can be firstly taken down, then the positioning pin and the screw on the bearing seat are taken down, the powder falling roller can be quickly pulled out, the purpose of cleaning powder is achieved, the powder falling roller can be mounted in the powder falling roller structure only by repositioning the pin and fixing the screw, and the powder falling roller is simple to mount and dismount.

On the other hand, in order to improve the overall sealing effect, the applicant installs a sealing ring and the like on the overall structure of the quantitative powder falling structure, so that the overall air tightness can be improved. In addition, the applicant also sets up the circular connector on the powder falling structure to it is fixed through the sheet metal component, and gathers the circuit of all sensors in the powder falling structure at the circular connector, thereby more makes things convenient for the dismantlement installation of whole powder falling structure.

Exemplary embodiments will now be described in more detail with reference to the accompanying drawings.

Examples

Example 1

As shown in fig. 1 to 6, the present example provides a quantitative powder dropping structure suitable for metal additive manufacturing, the quantitative powder dropping structure comprises, from top to bottom, a powder chamber assembly 2 and a powder dropping roller assembly 1, the powder chamber assembly 2 comprises a powder barrel 2-7 and a powder chamber 2-1; the powder dropping roller assembly 1 comprises a powder dropping roller 1-1, a powder dropping base 1-2, a coupler 1-13 and a servo motor 1-14, the right end of the powder dropping roller 1-1 is connected with the servo motor 1-14 through the coupler 1-13, the powder dropping base 1-2 comprises an upper powder dropping base 1-201 and a lower powder foundation base 1-202, and the powder dropping roller 1-1 is fixed between the upper powder dropping base 1-201 and the lower powder foundation base 1-202; the lower part of the powder cavity 2-1 is fixed with an upper powder falling base 1-201, the powder cavity 2-1 is of a hollow structure, a powder falling hole of the powder cavity is arranged below the powder cavity, the upper powder falling base 1-201 is provided with a powder falling roller powder inlet which penetrates through the upper part and the lower part, one end of the powder falling roller powder inlet is connected with the powder falling hole of the powder cavity, the other end of the powder falling roller powder inlet is connected with the upper left part of the powder falling roller 1-1, the lower powder falling base 1-202 is provided with a powder falling roller powder outlet which penetrates through the upper part and the lower part, and one end of the powder falling roller powder outlet is connected with the lower right part of the; the powder dropping roller 1-1 is provided with a groove, the upper powder dropping base 1-201 and the lower powder foundation base 1-202 are fixedly sealed through a screw and a sealing strip 1-16, the powder cavity assembly 2 and the powder dropping roller assembly 1 are fixedly sealed through a screw and a sealing ring, the left end of the powder dropping roller 1-1 is provided with a powder dropping collision block 1-10, the left end of the upper powder dropping base 1-201 is provided with a collision sensor 1-11, when the powder dropping collision block 1-10 rotates along with the powder dropping roller 1-1, the powder dropping collision block 1-10 collides with the collision sensor 1-11, and the collision sensor 1-11 is fixed at the left end of the upper powder dropping base 1-201 through a sensor fixing part 1-12; a positioning key 1-4 is arranged below the powder dropping base 1-202 and used for positioning the cavity, the powder dropping base 1-202 and the cavity are sealed and fixed with a base sealing ring 1-15 through screws, and a powder outlet of the powder dropping roller is communicated with the interior of the cavity; bearing seats 1-3 are symmetrically arranged between the left end and the right end of the powder dropping roller 1-1 and the powder dropping base 1-2, the bearing seats 1-3 and the powder dropping base 1-2 are positioned and fixed through 4 pins and 4 screws, a bearing 1-9 is arranged between the bearing seat 1-3 and the powder dropping roller 1-1, the inner side of the bearing 1-9 is sealed by a sealing cover 1-5 and the powder dropping roller 1-1, and the bearing 1-1 and the sealing cover 1-5 are sealed by a lip-shaped sealing ring 1-8; the sealing cover 1-5 and the powder dropping base 1-2 are sealed through a felt 1-6; 2 material loading level sensors 2-4 are symmetrically arranged above the powder cavity 2-1, 2 material unloading level sensors 2-3 are symmetrically arranged below the powder cavity 2-1, handles 2-2 are symmetrically arranged at the left end and the right end of the powder cavity 2-1, and the handles 2-2 and the powder cavity 2-1 are fixed through sealing gaskets and screws; an upper cover plate 2-5 is arranged above the powder cavity 2-1, the upper cover plate 2-5 and the powder cavity 2-1 are sealed through a sealing ring, an inert gas interface 2-6 is arranged on the upper cover plate 2-5, and the powder barrel 2-7 and the upper cover plate 2-5 are connected through a vacuum butterfly valve and a pipeline.

Example 2

The quantitative powder falling structure comprises a powder cavity assembly and a powder falling roller assembly from top to bottom, wherein the powder cavity assembly comprises a powder barrel and a powder cavity, and the lower part of the powder barrel is connected with the upper part of the powder cavity through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder feeding device comprises a powder cavity, a powder feeding roller, a powder discharging roller, an upper powder falling base, a powder discharging roller and a powder discharging roller, wherein the powder cavity is fixed to the upper powder falling base, the powder cavity is of a hollow structure, a powder discharging port of the powder cavity is arranged below the powder cavity, the upper powder falling base is provided with a powder feeding port of the powder discharging roller, the powder feeding port penetrates through the powder feeding roller from top to bottom, one end of the powder discharging port of the powder discharging roller is connected with the upper left side of the powder discharging roller; the powder dropping roller is provided with a groove, the upper powder dropping base and the lower powder foundation base are fixedly sealed through a screw and a sealing strip, the powder cavity assembly and the powder dropping roller assembly are fixedly sealed through a screw and a sealing ring, the left end of the powder dropping roller is provided with a powder dropping collision block, the left end of the upper powder dropping base is provided with a collision sensor, when the powder dropping collision block rotates along with the powder dropping roller, the powder dropping collision block collides with the collision sensor, and the collision sensor is fixed at the left end of the upper powder dropping base through a sensor fixing piece; a positioning key is arranged below the powder falling base and used for positioning the cavity, the powder falling base and the cavity are sealed and fixed through screws and base sealing rings, and a powder outlet of the powder falling roller is communicated with the interior of the cavity; bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, the bearing seats and the powder dropping base are positioned and fixed through 4 pins and 4 screws, a bearing is arranged between the bearing seat and the powder dropping roller, the inner side of the bearing is sealed with the powder dropping roller through a sealing cover, and the bearing and the sealing cover are sealed through a lip-shaped sealing ring; the sealing cover and the powder falling base are sealed through felt; 2 material loading level sensors are symmetrically arranged above the powder cavity side, 2 material unloading level sensors are symmetrically arranged below the powder cavity side, handles are symmetrically arranged at the left end and the right end of the powder cavity, and the handles and the powder cavity are fixed through a sealing gasket and screws; an upper cover plate is arranged above the powder cavity, the upper cover plate and the powder cavity are sealed through a sealing ring, and the powder barrel and the upper cover plate are connected through a vacuum butterfly valve and a pipeline.

Example 3

The quantitative powder falling structure comprises a powder cavity assembly and a powder falling roller assembly from top to bottom, wherein the powder cavity assembly comprises a powder barrel and a powder cavity, and the lower part of the powder barrel is connected with the upper part of the powder cavity through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder feeding device comprises a powder cavity, a powder feeding roller, a powder discharging roller, an upper powder falling base, a powder discharging roller and a powder discharging roller, wherein the powder cavity is fixed to the upper powder falling base, the powder cavity is of a hollow structure, a powder discharging port of the powder cavity is arranged below the powder cavity, the upper powder falling base is provided with a powder feeding port of the powder discharging roller, the powder feeding port penetrates through the powder feeding roller from top to bottom, one end of the powder discharging port of the powder discharging roller is connected with the upper left side of the powder discharging roller; the powder dropping roller is provided with a groove, the upper powder dropping base and the lower powder foundation base are fixedly sealed through a screw and a sealing strip, the powder cavity assembly and the powder dropping roller assembly are fixedly sealed through a screw and a sealing ring, a positioning key is arranged below the lower powder dropping base and used for positioning the cavity, the lower powder dropping base and the cavity are fixedly sealed through a screw and a base sealing ring, and a powder outlet of the powder dropping roller is communicated with the inside of the cavity; bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, the bearing seats and the powder dropping base are positioned and fixed through 4 pins and 4 screws, a bearing is arranged between the bearing seat and the powder dropping roller, the inner side of the bearing is sealed with the powder dropping roller through a sealing cover, and the bearing and the sealing cover are sealed through a lip-shaped sealing ring; the sealing cover and the powder falling base are sealed through felt; 2 material loading level sensors are symmetrically arranged above the powder cavity side, 2 material unloading level sensors are symmetrically arranged below the powder cavity side, handles are symmetrically arranged at the left end and the right end of the powder cavity, and the handles and the powder cavity are fixed through a sealing gasket and screws; an upper cover plate is arranged above the powder cavity, the upper cover plate and the powder cavity are sealed through a sealing ring, an inert gas interface is arranged on the upper cover plate, and the powder barrel and the upper cover plate are connected through a vacuum butterfly valve and a pipeline.

Example 4

The quantitative powder falling structure comprises a powder cavity assembly and a powder falling roller assembly from top to bottom, wherein the powder cavity assembly comprises a powder barrel and a powder cavity, and the lower part of the powder barrel is connected with the upper part of the powder cavity through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder feeding device comprises a powder cavity, a powder feeding roller, a powder discharging roller, an upper powder falling base, a powder discharging roller and a powder discharging roller, wherein the powder cavity is fixed to the upper powder falling base, the powder cavity is of a hollow structure, a powder discharging port of the powder cavity is arranged below the powder cavity, the upper powder falling base is provided with a powder feeding port of the powder discharging roller, the powder feeding port penetrates through the powder feeding roller from top to bottom, one end of the powder discharging port of the powder discharging roller is connected with the upper left side of the powder discharging roller; the powder dropping roller is provided with a groove, the upper powder dropping base and the lower powder foundation base are fixedly sealed through a screw and a sealing strip, the powder cavity assembly and the powder dropping roller assembly are fixedly sealed through a screw and a sealing ring, the left end of the powder dropping roller is provided with a powder dropping collision block, the left end of the upper powder dropping base is provided with a collision sensor, when the powder dropping collision block rotates along with the powder dropping roller, the powder dropping collision block collides with the collision sensor, and the collision sensor is fixed at the left end of the upper powder dropping base through a sensor fixing piece; a positioning key is arranged below the powder falling base and used for positioning the cavity, the powder falling base and the cavity are sealed and fixed through screws and base sealing rings, and a powder outlet of the powder falling roller is communicated with the interior of the cavity; bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, the bearing seats and the powder dropping base are positioned and fixed through 4 pins and 4 screws, a bearing is arranged between the bearing seat and the powder dropping roller, and the bearing and the powder dropping roller are sealed through a lip-shaped sealing ring; 2 material loading level sensors are symmetrically arranged above the powder cavity side, 2 material unloading level sensors are symmetrically arranged below the powder cavity side, handles are symmetrically arranged at the left end and the right end of the powder cavity, and the handles and the powder cavity are fixed through a sealing gasket and screws; an upper cover plate is arranged above the powder cavity, the upper cover plate and the powder cavity are sealed through a sealing ring, an inert gas interface is arranged on the upper cover plate, and the powder barrel and the upper cover plate are connected through a vacuum butterfly valve and a pipeline.

The applicant provides a ration structure of falling powder suitable for metal vibration material disk, and the device is simple, through the structure of design powder chamber subassembly and the powder roller subassembly that falls, when can improving powder changing efficiency, the feedback falls the state of powder roller, and the dismouting of being convenient for, has good leakproofness, can avoid metal powder and outside air contact, and through rational design seal structure, can avoid falling the powder of powder in-process and leak. And the applicant finds that compared with the embodiment 1, when an inert gas interface is not added in the embodiment 2, the quality of the metal powder is damaged, and when the sealing structure between the bearing seat and the powder falling roller is changed in the embodiment 4, the powder can leak.

The exemplary embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous specific details are set forth, such as examples of specific compositions, components, devices, and methods, to provide a thorough understanding of embodiments of the invention. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the invention. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

Claims

1. A quantitative powder falling structure suitable for metal additive manufacturing is characterized by comprising a powder cavity assembly and a powder falling roller assembly from top to bottom, wherein the powder cavity assembly comprises a powder barrel and a powder cavity, and the lower part of the powder barrel is connected with the upper part of the powder cavity through a pipeline; the powder dropping roller assembly comprises a powder dropping roller, a powder dropping base, a coupler and a servo motor, the right end of the powder dropping roller is connected with the servo motor through the coupler, the powder dropping base comprises an upper powder dropping base and a lower powder foundation base, and the powder dropping roller is fixed between the upper powder dropping base and the lower powder foundation base; the powder chamber below is fixed with the last powder base that falls, the powder chamber is hollow structure, and the powder chamber below is equipped with the powder mouth that falls in the powder chamber, the powder roller that falls that goes up the powder base and run through from top to bottom advances the powder mouth, the powder roller that falls advances powder mouth one end and connects the powder chamber and fall the powder mouth, and the upper left side of the powder roller that falls is connected to the other end, the powder roller that falls that the powder base is equipped with runs through from top to bottom goes out the powder mouth, the powder roller that falls goes out powder mouth one end and the powder roller that falls right side below is connected.

2. The quantitative powder dropping structure suitable for metal additive manufacturing according to claim 1, wherein the powder dropping roller is provided with a powder dropping collision block at a left end, the powder feeding base is provided with a collision sensor at a left end, and the powder dropping collision block collides with the collision sensor when the powder dropping collision block rotates along with the powder dropping roller.

3. The quantitative powder dropping structure suitable for metal additive manufacturing according to claim 1, wherein bearing seats are symmetrically arranged between the left end and the right end of the powder dropping roller and the powder dropping base, and the bearing seats are detachably connected with the powder dropping base.

4. The quantitative powder dropping structure suitable for metal additive manufacturing according to claim 3, wherein a bearing is arranged between the bearing seat and the powder dropping roller.

5. The quantitative powder dropping structure suitable for metal additive manufacturing according to claim 4, wherein the inner side of the bearing is sealed by a cover and a powder dropping roller.

6. The quantitative powder falling structure suitable for metal additive manufacturing according to claim 1, wherein a positioning key is arranged below the powder falling base and used for positioning with the cavity.

7. The quantitative powder falling structure suitable for metal additive manufacturing according to claim 2, wherein a feeding level sensor is arranged above the powder cavity side, and a discharging level sensor is arranged below the powder cavity side.

8. The quantitative powder falling structure suitable for metal additive manufacturing according to claim 1, wherein an inert gas port is arranged above the powder cavity.

9. The quantitative powder dropping structure suitable for metal additive manufacturing according to claim 7, wherein an aviation plug is arranged on the powder dropping roller assembly, and wires of the impact sensor, the feeding level sensor and the discharging level sensor are concentrated in the aviation plug.

10. The quantitative powder falling structure suitable for metal additive manufacturing according to any one of claims 1 to 9, wherein handles are symmetrically arranged at the left end and the right end of the powder cavity.