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

Abstract

The present invention discloses a powder spreading device for preparing continuous gradient material powder by using a lower powder supply selection area laser melting equipment, comprising a powder adding bin, a reinforcing beam, a partition baffle, an inclined baffle and a partition; a plurality of partition baffles divide the area enclosed by the powder adding bin and two groups of reinforcing beams into a plurality of partition areas, and a fracture is formed on the horizontal plane corresponding to the partition baffle and the notch; the inclined baffle divides the partition area into two or more gradient areas with triangular cross-sections; a fracture is formed on the horizontal plane corresponding to the inclined baffle and the notch; the partition is inserted into the powder adding bin by a socket, and passes through the fracture of the partition baffle and the inclined baffle, so as to divide the powder adding bin into an upper and lower space. The present invention adopts the mathematical means of differentiation to match different components in each gradient area, realizes the powder spreading process by a scraper, and realizes a more uniform mixing of each component, so that the gradient is more continuous.

Description

Technical Field

[0001] The invention relates to continuous gradient material powder technology, and more specifically to a device for preparing multi-component continuous gradient material powder based on a lower powder supply selection area laser melting device. Background Art

[0002] The "Material Genome Project" was proposed by the United States after the information technology revolution, when it fully realized the important role of material innovation in technological progress and industrial development, and in the strategic background of reviving the manufacturing industry. "High-throughput material preparation" effectively accelerates the exploration and research of new materials, further shortens the research and development cycle of new materials, and reduces research and development costs. At the same time, different materials are used at both ends of the parts, and a gradient interval is used to gradually transition between the two component materials, rather than the traditional direct interface bonding of the two AB materials. The performance of the corresponding materials is also gradually transitioned in the gradient interval to avoid part failure caused by interface bonding problems. There are many preparation methods for "high-throughput material preparation", mainly vapor deposition, powder metallurgy, centrifugal casting and selective laser melting additive manufacturing technology. Selective laser melting additive manufacturing technology itself is an extremely flexible production and preparation method. It uses high-energy lasers to prepare components with complex shapes. It has high molding accuracy and good mechanical properties, and has gradually become an important method for "high-throughput material preparation".

[0003] In the prior art, the invention patent with patent number CN105386037B proposes a method for forming functional gradient parts by selective laser melting forming technology, wherein powder A is placed in a powder feeding bed and powder B is placed in a powder feeding hopper by selective laser melting forming equipment, powder A is formed first, and then powder B is formed to achieve sample preparation, but there is an obvious interface between the two materials A / B; the invention patent with patent number CN108393491B proposes a device for preparing functional gradient materials by selective laser melting, wherein a powder supply method of conveying different powders by double lower-mounted powder feeding cylinders is used to achieve sample preparation, but it is not a continuous gradient in the strict sense; the invention patent application with patent number CN111906305A proposes a device and method for laying powder of continuous gradient materials by selective laser melting, wherein a single-component powder feeding cylinder is independently lifted and a two-component powder feeding cylinder is rotated as a whole, and the laying of powder of a two-component continuous mass gradient material is achieved through the coordinated movement of independent lifting and overall rotation, but its powder supply structure is complex, and gradient powder supply between more components cannot be easily achieved.

[0004] Therefore, how to simplify the technical threshold of multi-component continuous gradients and reduce preparation costs, and quickly and effectively realize the iterative cycle of new material development, is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] In view of this, the present invention provides a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting equipment, aiming to solve the above technical problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The lower powder supply and selection area laser melting equipment is a powder spreading device for preparing continuous gradient material powder, comprising:

[0008] Powder adding bin; the powder adding bin is a cylindrical structure with upper and lower openings; a group of corresponding side walls of the powder adding bin have horizontally opened and corresponding notches on their upper parts;

[0009] Reinforcement beams; the number of the reinforcement beams is at least 4, and the reinforcement beams are divided into two groups and fixed to the upper and lower parts of the inner side wall of the powder adding bin; the reinforcement beams are perpendicular to the notch;

[0010] Partition baffles; the number of the partition baffles is multiple; the multiple partition baffles are vertically fixed between the two groups of reinforcement beams and are arranged in parallel with equal spacing; the multiple partition baffles divide the area enclosed by the powder filling bin and the two groups of reinforcement beams into multiple partition areas, and the partition baffles are formed with fractures on the horizontal planes corresponding to the notches;

[0011] Oblique baffles; the number of the oblique baffles is multiple, and they are divided into multiple groups according to the number of the separation areas; each separation area has at least one oblique baffle; the oblique baffles are fixed obliquely between the two groups of reinforcing beams to divide the separation area into two or more gradient areas with triangular cross-sections; the oblique baffles are formed with a fracture on the horizontal plane corresponding to the notch;

[0012] Partition; the partition is inserted into the powder adding bin through the socket and passes through the fracture of the partition baffle and the inclined baffle, so as to divide the powder adding bin into two layers of space, upper and lower.

[0013] Through the above technical scheme, the present invention uses an inclined baffle to directly divide the powder filling bin into two or more gradient areas with triangular cross-sections, which is different from the single inclined baffle division powder filling method in the prior art. Different mathematical means of differentiation are used to match different components in each gradient area, and the powder laying process is realized by a scraper. The components are mixed more evenly, making the gradient more continuous.

[0014] Preferably, in the above-mentioned lower powder supply and selection area laser melting equipment for preparing continuous gradient material powder spreading device, when there is one inclined baffle in the separation area, the inclined baffle coincides with the diagonal of the separation area; when there are two inclined baffles in the separation area, one inclined baffle coincides with the diagonal of the separation area, and the other inclined baffle divides the divided triangular area into two triangular gradient areas again; when there are three inclined baffles in the separation area, one inclined baffle coincides with the diagonal of the separation area, and the other two inclined baffles are arranged in parallel, and each divides the divided triangular area into two triangular gradient areas again. According to the setting of different numbers of inclined baffles, multi-component gradient powder supply can be realized, and its use is more expandable.

[0015] Preferably, in the above-mentioned powder spreading device for preparing continuous gradient material powder by powder selection area laser melting equipment, one side edge of the partition has a strip-shaped push-pull convex strip, and one side edge of the partition away from the push-pull convex strip is formed with a pointed chamfer. The structural arrangement of the push-pull convex strip and the pointed chamfer facilitates the insertion and extraction of the partition.

[0016] Preferably, in the above-mentioned powder spreading device for preparing continuous gradient material powder by the lower powder supply selection area laser melting equipment, the width of the notch is smaller than the width of the push-pull convex strip, so as to achieve the limit of the partition insertion.

[0017] Preferably, in the above-mentioned powder spreading device for preparing continuous gradient material powder by the lower powder supply and selection area laser melting equipment, 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; the two groups of reinforcing beams respectively enclose two long strip areas located on both sides of the three-dimensional area with the inner walls of the two sides of the powder adding bin. Since there is powder on both sides, the powders fill each other when the device is withdrawn as a whole, but the gradient area will not move.

[0018] Preferably, in the above-mentioned powder spreading device for preparing continuous gradient material powder by lower powder supply and selection area laser melting equipment, the cross section of the powder feeding bin is square, and the four corners are rounded, so as to facilitate the arrangement of various structures.

[0019] Preferably, in the above-mentioned powder spreading device for preparing continuous gradient material powder by the lower powder supply selection area laser melting equipment, the two side walls of the powder supply bin perpendicular to the length direction of the slot are provided with slide grooves on the same horizontal plane, and the slide grooves can be slidably connected with the edge of the partition, so as to ensure the stable insertion of the partition.

[0020] Preferably, in the above-mentioned powder-feeding and selective laser melting device for preparing continuous gradient material powder, the partition is made by FDM additive manufacturing, and the partition is made of plastic or metal, which is convenient and reliable to manufacture and simple to obtain materials.

[0021] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting device, which has the following beneficial effects:

[0022] 1. The present invention uses an inclined baffle to directly divide the powder filling bin into two or more gradient areas with triangular cross sections, which is different from the single inclined baffle division powder filling method in the prior art. Different components are matched in each gradient area by differential mathematical means, and the powder laying process is realized by a scraper, so that each component is mixed more evenly and the gradient is more continuous.

[0023] 2. The present invention can realize multi-component gradient powder supply according to the arrangement of different numbers of inclined baffles, and its application is more expandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 The accompanying drawing is a schematic structural diagram of a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting equipment provided by the present invention;

[0026] Figure 2 The accompanying drawing is a top view of a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting equipment provided by the present invention;

[0027] Figure 3 The accompanying drawing is a cross-sectional view of a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting equipment provided by the present invention;

[0028] Figure 4 The accompanying drawing is a schematic diagram of the structure of the partition provided by the present invention;

[0029] Figure 5 The attached picture is Figure 4 A magnified view of the part A in the middle;

[0030] Figure 6 The accompanying drawing is a top view of the powder filling bin after filling of Example 1 provided by the present invention;

[0031] Figure 7 The accompanying drawing is a top view of the powder supply cylinder after the powder filling bin is removed according to the embodiment 1 of the present invention;

[0032] Figure 8The accompanying drawing is a top view of the powder supply cylinder after the powder is spread by a scraper according to Example 1 of the present invention;

[0033] Fig. 9 The accompanying drawing is a top view of the powder filling bin after filling of Example 2 provided by the present invention;

[0034] Fig.10 The accompanying drawing is a top view of the powder filling bin after filling of Example 3 provided by the present invention.

[0035] in:

[0036] 1-Powder filling bin;

[0037] 11-notch; 12-slideway;

[0038] 2- Strengthening beam;

[0039] 3-Partition baffle;

[0040] 31-separated area;

[0041] 4- inclined baffle;

[0042] 41- Gradient area;

[0043] 5-partition;

[0044] 51- push-pull convex strip; 52- pointed chamfer;

[0045] 6- Powder supply tank. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See attached Figure 1 To Attachment Figure 5 The embodiment of the present invention discloses a powder spreading device for preparing continuous gradient material powder by a lower powder supply selection area laser melting device, comprising:

[0048] The powder adding bin 1 is a cylindrical structure with upper and lower openings; a corresponding set of side walls of the powder adding bin 1 have horizontally opened and corresponding notches 11;

[0049] Reinforcement beam 2; the number of reinforcement beams 2 is at least 4, and is divided into two groups corresponding to the upper and lower parts of the inner wall of the powder adding bin 1; the reinforcement beam 2 is perpendicular to the notch 11;

[0050] Partition baffles 3; there are multiple partition baffles 3; multiple partition baffles 3 are vertically fixed between the two groups of reinforcing beams 2 and are arranged in parallel with equal intervals; the multiple partition baffles 3 divide the area surrounded by the powder filling bin 1 and the two groups of reinforcing beams 2 into multiple partition areas 31, and the partition baffles 3 are formed with fractures on the horizontal plane corresponding to the notch 11;

[0051] The inclined baffle 4 is a plurality of inclined baffles 4, and is divided into a plurality of groups according to the number of the partitioning areas 31; each partitioning area 31 has at least one inclined baffle 4; the inclined baffle 4 is fixed obliquely between the two groups of reinforcing beams 2, and the partitioning area 31 is divided into two or more gradient areas 41 with triangular cross sections; a fracture is formed on the horizontal plane corresponding to the inclined baffle 4 and the notch 11;

[0052] The partition 5 is inserted into the powder adding bin 1 by the socket 11, and passes through the fracture of the partition baffle 3 and the inclined baffle 4, so as to divide the powder adding bin 1 into two layers of space, upper and lower.

[0053] In order to further optimize the above technical features, one side edge of the partition 5 has a strip-shaped push-pull convex strip 51 , and one side edge of the partition 5 away from the push-pull convex strip 51 is formed with a pointed chamfer 52 .

[0054] In order to further optimize the above technical features, the width of the notch 11 is smaller than the width of the push-pull convex strip 51 .

[0055] In order to further optimize the above technical features, the area enclosed by the powder adding bin 1 and the two sets of reinforcing beams 2 is a three-dimensional area with a rectangular cross-section; the two sets of reinforcing beams 2 respectively enclose the inner walls on both sides of the powder adding bin 1 to form two long strip areas located on both sides of the three-dimensional area.

[0056] In order to further optimize the above technical features, the cross section of the powder adding bin 1 is a square with rounded corners.

[0057] In order to further optimize the above technical features, two side walls of the powder adding bin 1 that are perpendicular to the length direction of the slot 11 are provided with slide grooves 12 in the same horizontal plane, and the slide grooves 12 can be slidably connected to the edge of the partition 5 .

[0058] In order to further optimize the above technical features, the partition 5 is made by FDM additive manufacturing.

[0059] In order to further optimize the above technical features, the partition 5 is made of plastic or metal.

[0060] Embodiment 1:

[0061] See attached Figure 6 To Attachment Figure 8 When there is an inclined baffle plate 4 in the separation area 31 , the inclined baffle plate 4 coincides with the diagonal line of the separation area 31 .

[0062] Embodiment 2:

[0063] See attached Fig. 9 When there are two inclined baffles 4 in the separation area 31 , one inclined baffle 4 coincides with the diagonal line of the separation area 31 , and the other inclined baffle 4 divides the divided triangular area into two triangular gradient areas 41 again.

[0064] Embodiment 3:

[0065] See attached Fig.10 When there are three inclined baffles 4 in the separation area 31, one inclined baffle 4 coincides with the diagonal of the separation area 31, and the other two inclined baffles 4 are arranged in parallel and divide the divided triangular area into two triangular gradient areas 41 respectively.

[0066] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powder spreading device for preparing continuous gradient material powder in a lower powder supply selection area laser melting equipment, characterized in that: include: A powder adding bin (1); the powder adding bin (1) is a cylindrical structure with upper and lower openings; a group of corresponding side walls of the powder adding bin (1) have horizontally opened corresponding notches (11); Reinforcing beams (2); the number of the reinforcing beams (2) is at least four, and the reinforcing beams (2) are divided into two groups and fixed correspondingly to the upper and lower parts of the inner wall of the powder adding bin (1); the reinforcing beams (2) are perpendicular to the notch (11); Partition baffles (3); the number of the partition baffles (3) is multiple; the multiple partition baffles (3) are vertically fixed between the two groups of reinforcement beams (2) and are arranged in parallel at equal intervals; the multiple partition baffles (3) divide the area enclosed by the powder filling bin (1) and the two groups of reinforcement beams (2) into multiple partition areas (31), and the partition baffles (3) are formed with fractures on the horizontal planes corresponding to the notches (11); An inclined baffle (4); the inclined baffles (4) are multiple in number and are divided into multiple groups according to the number of the partitioning areas (31); each of the partitioning areas (31) has at least one inclined baffle (4); the inclined baffles (4) are tilted and fixed between two groups of the reinforcing beams (2) to divide the partitioning area (31) into two or more gradient areas (41) with triangular cross-sections; a fracture is formed on the horizontal plane of the inclined baffle (4) corresponding to the notch (11); A partition (5); the partition (5) is inserted into the powder adding bin (1) through the notch (11) and passes through the fracture of the partition baffle (3) and the inclined baffle (4), so as to divide the powder adding bin (1) into two layers of space, upper and lower; When there are two inclined baffles (4) in the separation area (31), one of the inclined baffles (4) coincides with the diagonal of the separation area (31), and the other inclined baffle (4) divides the divided triangular area into two triangular gradient areas (41); when there are three inclined baffles (4) in the separation area (31), one of the inclined baffles (4) coincides with the diagonal of the separation area (31), and the other two inclined baffles (4) are arranged in parallel and divide the divided triangular area into two triangular gradient areas (41) respectively; One side edge of the partition plate (5) is provided with a strip-shaped push-pull convex strip (51), and one side edge of the partition plate (5) away from the push-pull convex strip (51) is formed with a pointed chamfer (52).

2. The powder spreading device for preparing continuous gradient material powder by the lower powder supply selection area laser melting equipment according to claim 1, characterized in that: The width of the notch (11) is smaller than the width of the push-pull convex strip (51).

3. The powder spreading device for preparing continuous gradient material powder by the lower powder supply selection area laser melting equipment according to claim 1, characterized in that: 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; the two groups of reinforcing beams (2) respectively enclose two long strip areas located on both sides of the three-dimensional area with the inner walls of both sides of the powder adding bin (1).

4. The powder spreading device for preparing continuous gradient material powder by the lower powder supply selection area laser melting equipment according to claim 1, characterized in that: The cross section of the powder filling bin (1) is a square, and the four corners are rounded.

5. The powder spreading device for preparing continuous gradient material powder by lower powder supply and selection area laser melting equipment according to claim 1, characterized in that: The two side walls of the powder filling bin (1) which are perpendicular to the length direction of the slot (11) are provided with slide grooves (12) in the same horizontal plane, and the slide grooves (12) can be slidably connected to the edge of the partition plate (5).

6. The powder spreading device for preparing continuous gradient material powder by lower powder supply and selection area laser melting equipment according to claim 1, characterized in that: The partition (5) is manufactured by FDM additive manufacturing.

7. The powder spreading device for preparing continuous gradient material powder by lower powder supply and selection area laser melting equipment according to claim 1, characterized in that: The partition (5) is made of plastic or metal.

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