CN113857496A

CN113857496A - Powder spreading device for preparing continuous gradient material powder by laser melting equipment in lower powder supply selection area

Info

Publication number: CN113857496A
Application number: CN202111271451.5A
Authority: CN
Inventors: 侯瑞东; 赵浩; 陈庆文; 李香云
Original assignee: Beijing Longyuan Automated Fabrication System Co ltd
Current assignee: Beijing Longyuan Automated Fabrication System Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2021-12-31

Abstract

The invention discloses a powder paving device for preparing continuous gradient material powder by using laser melting equipment in a lower powder supply selection area, which comprises a powder adding bin, a stiffening beam, a partition baffle, an inclined baffle and a partition plate, wherein the stiffening beam is arranged on the lower powder supply selection area; the powder adding bin is provided with a plurality of reinforcing beams, the reinforcing beams are arranged on the powder adding bin, and the reinforcing beams are arranged on the powder adding bin; the inclined baffle plate divides the separation area into two or more gradient areas with triangular sections; a fracture is formed on the horizontal plane of the inclined baffle plate corresponding to the notch; inside the baffle inserted by the socket and added the powder storehouse, and passed the fracture of subregion baffle and oblique baffle, can divide into upper and lower two-layer space with adding the powder storehouse. The invention adopts a differential mathematical means to match different components in each gradient area, realizes the powder laying process through the scraper, realizes more uniform mixing of the components and ensures more continuous gradient.

Description

Powder spreading device for preparing continuous gradient material powder by laser melting equipment in lower powder supply selection area

Technical Field

The invention relates to a continuous gradient material powder technology, in particular to a laying device for preparing multi-component continuous gradient material powder based on a lower powder supply selection area laser melting device.

Background

The "material genome project" is proposed in the strategic background of reviving the manufacturing industry after the information technology revolution in the united states, with the important recognition of the material innovation on the technological progress and the industrial development. The preparation of the high-flux material effectively accelerates the research and study of new materials, and further shortens the research and development period of the new materials and reduces the research and development cost. Meanwhile, materials with different components are adopted at two ends of the part, gradient interval gradual transition is adopted between the two component materials instead of the traditional direct interface combination of AB two materials, the performance of the corresponding materials is gradually transited in the gradient interval, and the part failure caused by the interface combination problem is avoided. The preparation method of the high-flux material is various, and mainly comprises vapor deposition, powder metallurgy, centrifugal casting and selective laser melting additive manufacturing technologies. The selective laser melting additive manufacturing technology is a very flexible production and preparation means, a member with a complex shape is prepared by adopting high-energy laser, the forming precision is high, the mechanical property is good, and the selective laser melting additive manufacturing technology gradually becomes an important method for preparing high-flux materials.

In the prior art, the invention patent with the patent number of CN105386037B provides a method for forming a functional gradient part by adopting a selective laser melting forming technology, powder A is placed in a powder feeding bed by adopting selective laser melting forming equipment, powder B is placed in a powder feeding hopper, the powder A is formed firstly, and then the powder B is formed to realize sample preparation, but an obvious interface exists between the A/B materials; the invention patent with the patent number of CN108393491B provides a device for preparing a functional gradient material by selective laser melting, which realizes sample preparation by adopting a powder supply mode that a double-underneath type powder feeding cylinder conveys different powders, but the sample preparation is not a continuous gradient in a strict sense; the invention patent application with the patent number of CN111906305A provides a device and a method for paving selective laser melting continuous gradient material powder, wherein the design that a single-component powder supply cylinder independently ascends and descends and a double-component powder supply cylinder integrally rotates is adopted, and the paving of the double-component continuous mass gradient material powder is realized through the cooperative motion of independent ascending and descending and integral rotation, but the powder supply structure is complex, and the gradient powder supply among more components cannot be easily realized.

Therefore, how to simplify the technical threshold of multi-element continuous gradient and reduce the preparation cost, and quickly and effectively implement the new material development iteration cycle is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a powder spreading apparatus for preparing continuous gradient material powder by using a laser melting device in a lower powder supply selection area, and aims to solve the above technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

the powder spreading device for preparing continuous gradient material powder by using laser melting equipment in the lower powder supply selection area comprises:

a powder adding bin; the powder adding bin is of a cylindrical structure with an upper opening and a lower opening; the upper parts of one group of corresponding side walls of the powder adding bin are provided with corresponding notches which are horizontally arranged;

a reinforcing beam; the number of the reinforcing beams is at least 4, and the reinforcing beams are divided into two groups and correspondingly fixed on the upper part and the lower part of the inner side wall of the powder adding bin; the stiffening beam is perpendicular to the notch;

partition baffles; the number of the partition baffles is multiple; the partition baffles are vertically fixed between the two groups of stiffening beams and are arranged in parallel at equal intervals; the powder adding bin and the two groups of reinforcing beams are surrounded by the plurality of partition baffles to form a region, and a fracture is formed on a horizontal plane corresponding to the notch;

an inclined baffle plate; the number of the inclined baffles is multiple, and the inclined baffles are divided into multiple groups according to the number of the separation areas; each partition area is internally provided with at least one inclined baffle; the inclined baffle is obliquely fixed between the two groups of the reinforcing beams, and the separation area is divided into two or more gradient areas with triangular sections; a fracture is formed on the horizontal plane of the inclined baffle plate corresponding to the notch;

a partition plate; the baffle by the socket inserts add inside the powder storehouse, and pass the subregion baffle with the fracture of oblique baffle can with add the powder storehouse and divide into two-layer space from top to bottom.

Through the technical scheme, the powder adding bin is directly divided into two or more gradient areas with triangular sections by the inclined baffle, the single inclined baffle in the prior art is distinguished from the powder adding mode, each gradient area is matched with different components by adopting a differential mathematical means, the powder laying process is realized through the scraper, the components are mixed more uniformly, and the gradient is more continuous.

Preferably, in the above apparatus for preparing powder of continuous gradient material by using laser melting equipment in the lower powder supply separation region, when there is one inclined baffle plate in the separation region, the inclined baffle plate coincides with a diagonal line of the separation region; when two inclined baffles are arranged in the separation area, one inclined baffle is superposed with the diagonal line of the separation area, and the other inclined baffle divides the divided triangular area into two triangular gradient areas again; when three inclined baffles are arranged in the separation area, one inclined baffle is superposed with the diagonal line of the separation area, the other two inclined baffles are arranged in parallel, and the divided triangular area is divided into two triangular gradient areas again respectively. According to the setting of the oblique baffle of different quantity, can realize that multicomponent gradient supplies powder, the expansibility of its use is stronger.

Preferably, in the device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply and selection area, a strip-shaped push-pull convex strip is arranged at one side edge of the partition plate, and a pointed chamfer is formed at one side edge of the partition plate, which is far away from the push-pull convex strip. The structure setting of push-and-pull sand grip and tip chamfer is convenient for the inserting and taking out of baffle.

Preferably, in the above-mentioned powder paving device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply and selection area, the width of the notch is smaller than that of the push-pull convex strip. The spacing of baffle male can be realized.

Preferably, in the device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply selection area, the area enclosed by the powder adding bin and the two groups of reinforcing beams is a three-dimensional area with a rectangular cross section; and the two groups of stiffening beams respectively enclose the inner walls at two sides of the powder adding bin to form two strip areas positioned at two sides of the three-dimensional area. Because both sides have powder, the powder fills each other when the device is wholly withdrawn, but the gradient area does not move.

Preferably, in the above-mentioned powder paving device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply and selection area, the cross section of the powder adding bin is square, and four corners of the powder adding bin are rounded. Facilitating the arrangement of the structures.

Preferably, in the above-mentioned powder feeding and separation area laser melting device under preparation continuous gradient material powder shop powder device, add the powder storehouse with have the spout in the coplanar on the perpendicular two lateral walls of notch length direction, the spout can with baffle border sliding connection. The stable insertion of the partition can be ensured.

Preferably, in the device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply and selection area, the partition plate is made in an FDM additive manufacturing mode and is made of plastic or metal. The preparation is convenient and reliable, and the materials are simple.

According to the technical scheme, compared with the prior art, the invention discloses the device for preparing the continuous gradient material powder by the laser melting equipment in the lower powder supply and selection area, and the device has the following beneficial effects:

1. the powder feeding bin is directly divided into two or more gradient areas with triangular sections by the inclined baffle, the method is different from the single inclined baffle dividing powder feeding mode in the prior art, each gradient area is matched with different components by adopting a differential mathematical means, the powder laying process is realized by the scraper, the components are mixed more uniformly, and the gradient is more continuous

2. According to the invention, multi-component gradient powder supply can be realized according to the arrangement of different numbers of inclined baffles, and the expansibility of the powder supply is stronger.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a powder paving device for preparing continuous gradient material powder by using a lower powder supply selection area laser melting device provided by the invention;

FIG. 2 is a top view of a powder paving device for preparing continuous gradient material powder by using a laser melting device in a lower powder supply selection area provided by the invention;

FIG. 3 is a cross-sectional view of a powder spreading device for preparing continuous gradient material powder by using a laser melting device in a lower powder supply selection area provided by the invention;

FIG. 4 is a schematic structural view of a separator according to the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a top view of the powder adding bin of example 1 according to the present invention after filling;

FIG. 7 is a top view of the powder feeding cylinder with the powder adding bin removed according to example 1 of the present invention;

FIG. 8 is a top view of the powder feeding cylinder after powder spreading by a scraper according to example 1 of the present invention;

FIG. 9 is a top view of the powder adding bin of example 2 according to the present invention after filling;

fig. 10 is a top view of the powder adding bin of embodiment 3 according to the present invention.

Wherein:

1-powder adding bin;

11-notches; 12-a chute;

2-a reinforcing beam;

3-partition baffle;

31-a separation region;

4-an inclined baffle plate;

41-gradient region;

5-a separator;

51-push-pull convex strips; 52-tip chamfering;

6-powder supply cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the accompanying drawings 1 to 5, the embodiment of the invention discloses a powder spreading device for preparing continuous gradient material powder by using laser melting equipment in a lower powder supply selection area, which comprises:

a powder adding bin 1; the powder adding bin 1 is of a cylindrical structure with an upper opening and a lower opening; the upper parts of one group of corresponding side walls of the powder adding bin 1 are provided with corresponding notches 11 which are horizontally arranged;

a reinforcing beam 2; the number of the reinforcing beams 2 is at least 4, and the reinforcing beams are divided into two groups and correspondingly fixed on the upper part and the lower part of the inner side wall of the powder adding bin 1; the reinforcing beam 2 is vertical to the notch 11;

a partition baffle 3; the number of the partition baffles 3 is multiple; the partition baffles 3 are vertically fixed between the two groups of stiffening beams 2 and are arranged in parallel at equal intervals; the powder adding bin 1 and the two groups of reinforcing beams 2 are enclosed by a plurality of partition baffles 3 to form a plurality of partition areas 31, and fractures are formed on horizontal planes of the partition baffles 3 corresponding to the notches 11;

an inclined baffle 4; the number of the inclined baffles 4 is multiple, and the inclined baffles are divided into multiple groups according to the number of the separation areas 31; at least one inclined baffle 4 is arranged in each separation area 31; the inclined baffle 4 is obliquely fixed between the two groups of reinforcing beams 2 to divide the dividing region 31 into two or more gradient regions 41 with triangular sections; a fracture is formed on the horizontal plane of the inclined baffle 4 corresponding to the notch 11;

a partition 5; the baffle 5 is inserted by the socket 11 and is added inside the powder storehouse 1, and passes the fracture of subregion baffle 3 and oblique baffle 4, can divide into upper and lower two-layer space with adding powder storehouse 1.

In order to further optimize the technical characteristics, one side edge of the partition board 5 is provided with a strip-shaped push-pull convex strip 51, and one side edge of the partition board 5 far away from the push-pull convex strip 51 is provided with a sharp-pointed chamfer 52.

To further optimize the above technical features, the width of the notch 11 is smaller than the width of the push-pull protrusion 51.

In order to further optimize the technical characteristics, the area enclosed by the powder adding bin 1 and the two groups of reinforcing beams 2 is a three-dimensional area with a rectangular cross section; two groups of stiffening beams 2 enclose two strip areas positioned at two sides of the three-dimensional area with the inner walls at two sides of the powder adding bin 1 respectively.

In order to further optimize the technical characteristics, the cross section of the powder adding bin 1 is square, and four corners of the powder adding bin are rounded.

In order to further optimize the technical characteristics, the two side walls of the powder adding bin 1, which are perpendicular to the length direction of the notch 11, are provided with sliding grooves 12 on the same horizontal plane, and the sliding grooves 12 can be in sliding connection with the edges of the partition board 5.

To further optimize the above technical features, the partition 5 is made in an FDM additive manufacturing manner.

In order to further optimize the above technical features, the partition 5 is made of plastic or metal.

Example 1:

referring to fig. 6 to 8, when there is one inclined baffle 4 in the partition area 31, the inclined baffle 4 coincides with a diagonal line of the partition area 31.

Example 2:

referring to fig. 9, when two inclined baffles 4 are arranged in the partition area 31, one inclined baffle 4 is overlapped with the diagonal line of the partition area 31, and the other inclined baffle 4 divides the divided triangular area into two triangular gradient areas 41 again.

Example 3:

referring to fig. 10, when there are three inclined baffles 4 in the partition area 31, one inclined baffle 4 is overlapped with the diagonal line of the partition area 31, and the other two inclined baffles 4 are arranged in parallel and respectively divide the divided triangular area into two triangular gradient areas 41 again.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Powder device is spread to continuous gradient material powder of lower confession powder selection district laser melting equipment preparation, its characterized in that includes:

a powder adding bin (1); the powder adding bin (1) is of a cylindrical structure with an upper opening and a lower opening; the upper parts of one group of corresponding side walls of the powder adding bin (1) are provided with corresponding notches (11) which are horizontally arranged;

a reinforcement beam (2); the number of the reinforcing beams (2) is at least 4, and the reinforcing beams are divided into two groups and correspondingly fixed on the upper part and the lower part of the inner side wall of the powder adding bin (1); the reinforcing beam (2) is perpendicular to the notch (11);

a partition baffle (3); the number of the partition baffles (3) is multiple; the partition baffles (3) are vertically fixed between the two groups of reinforcing beams (2) and are arranged in parallel at equal intervals; the powder adding bin (1) and the two groups of reinforcing beams (2) are enclosed by the partition baffles (3) to form a plurality of partition areas (31), and fractures are formed on horizontal planes of the partition baffles (3) corresponding to the notches (11);

an inclined baffle plate (4); the number of the inclined baffles (4) is multiple, and the inclined baffles are divided into multiple groups according to the number of the separation areas (31); at least one inclined baffle (4) is arranged in each separation area (31); the inclined baffle (4) is obliquely fixed between the two groups of the reinforcing beams (2) to divide the dividing region (31) into two or more gradient regions (41) with triangular sections; a fracture is formed on the horizontal plane of the inclined baffle (4) corresponding to the notch (11);

a partition plate (5); baffle (5) by socket (11) insert add inside powder storehouse (1), and pass subregion baffle (3) with the fracture of oblique baffle (4), can with add powder storehouse (1) and divide into two-layer space from top to bottom.

2. The device for preparing continuous gradient material powder paving by a lower powder supply selective area laser melting device according to claim 1, characterized in that when one inclined baffle plate (4) is arranged in the separation area (31), the inclined baffle plate (4) is superposed with the diagonal line of the separation area (31); when two inclined baffles (4) are arranged in the separation region (31), one inclined baffle (4) is superposed with the diagonal line of the separation region (31), and the other inclined baffle (4) divides the divided triangular region into two triangular gradient regions (41) again; when three inclined baffles (4) are arranged in the separation region (31), one inclined baffle (4) is superposed with the diagonal line of the separation region (31), the other two inclined baffles (4) are arranged in parallel, and the divided triangular region is divided into two triangular gradient regions (41) again respectively.

3. The device for preparing the continuous gradient material powder paving device by the laser melting equipment of the lower powder supply selection area according to claim 1, characterized in that a strip-shaped push-pull convex strip (51) is arranged at one side edge of the partition plate (5), and a sharp-pointed chamfer (52) is formed at one side edge of the partition plate (5) far away from the push-pull convex strip (51).

4. The device for preparing continuous gradient material powder paving by a lower powder supply selective area laser melting device according to claim 3, characterized in that the width of the notch (11) is smaller than the width of the push-pull rib (51).

5. The device for preparing the continuous gradient material powder paving in the lower powder supply selection area laser melting equipment according to claim 1, wherein the area enclosed by the powder adding bin (1) and the two groups of the reinforcing beams (2) is a three-dimensional area with a rectangular cross section; the two groups of the reinforcing beams (2) and the inner walls of the two sides of the powder adding bin (1) enclose two strip areas positioned on the two sides of the three-dimensional area respectively.

6. The device for preparing the continuous gradient material powder by the laser melting equipment of the lower powder supply selection area according to claim 1, wherein the cross section of the powder adding bin (1) is square and four corners of the powder adding bin are rounded.

7. The device for preparing the continuous gradient material powder paving by the laser melting equipment of the lower powder supply selection area according to claim 1, is characterized in that sliding grooves (12) in the same horizontal plane are formed in two side walls, perpendicular to the length direction of the notch (11), of the powder adding bin (1), and the sliding grooves (12) can be in sliding connection with the edges of the partition boards (5).

8. The device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply selection area according to claim 1, wherein the partition plate (5) is manufactured by adopting an FDM additive manufacturing mode.

9. The device for preparing continuous gradient material powder by using the laser melting equipment in the lower powder supply selection area according to claim 1, wherein the partition plate (5) is made of plastic or metal.