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CN207464196U - Improve powder device of being coated with property and uniformity on printing substrate in 3D printing - Google Patents

Improve powder device of being coated with property and uniformity on printing substrate in 3D printing Download PDF

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Publication number
CN207464196U
CN207464196U CN201721651709.3U CN201721651709U CN207464196U CN 207464196 U CN207464196 U CN 207464196U CN 201721651709 U CN201721651709 U CN 201721651709U CN 207464196 U CN207464196 U CN 207464196U
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Prior art keywords
substrate
powder
grid
grid member
coated
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CN201721651709.3U
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Chinese (zh)
Inventor
韩向阳
何志娟
邵犬
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Shenzhen Huayang New Mstar Technology Ltd
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Shenzhen Huayang New Mstar Technology Ltd
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Abstract

The utility model discloses powder device of being coated with property and uniformity on printing substrate in a kind of raising 3D printing, which includes:Laser head (1), by emitting shape hot briquetting of the laser by the powder to be printed being coated with above substrate (3) according to setting;Scraper (2) moves back and forth to carry out powdering operation to the upper surface of substrate (3) in the top of substrate (3);Substrate (3), upper surface are coated with powder to be printed, protrude from substrate (3) upper surface and pass through laser melting and are fixedly connected with grid member (5);Wherein, the grid lines in the grid member (5) is staggered, also, grid lines in the same direction is arranged in parallel.Described device can effectively improve the being coated with property and uniformity of powder in print procedure, improve the compactness and mechanical property of shaping workpiece, it is ensured that the cleannes of shaping workpiece will not pollute in print procedure.

Description

Improve powder device of being coated with property and uniformity on printing substrate in 3D printing
Technical field
The utility model is related to a kind of raising powder device of being coated with property and uniformity on plank, more particularly to one kind carries Powder device of being coated with property and uniformity on printing substrate, belongs to 3D printing technique field in high 3D printing.
Background technology
It during 3D printing, needs powder being uniformly coated on substrate, laser melting molding can be carried out.So And for some metal-powders, such as aluminium alloy powder, poor fluidity in printing powdering operation, usually will appear powder Powdering is uneven on substrate or even does not spread the situation of powder.This can seriously affect heat of the shaping workpiece in print procedure and pass It leads, the consistency and mechanical property of shaping workpiece, makes the product that printing obtains that can not meet requirement.
For these reasons, the present inventor is improved existing technology, and working out one kind can improve in 3D printing Powder device of being coated with property and uniformity on printing substrate.
Utility model content
In order to overcome the above problem, present inventor has performed sharp studies, design powder in a kind of raising 3D printing and exist The device of being coated with property and uniformity on substrate, described device become substrate in substrate surface setting grid member, enhance on substrate The degree of roughness on surface so as to increase friction of the powder during being coated between substrate, and then improves powder in powdering Being coated with property and uniformity in operation.
Specifically, the purpose of this utility model is to provide powders in a kind of raising 3D printing to be coated on printing substrate The device of property and uniformity, described device include:
The powder to be printed that 3 top of substrate is coated with is heated by laser head 1 by emitting laser according to the shape of setting Type;With,
Scraper 2 moves back and forth to carry out powdering operation to the upper surface of substrate 3 in the top of substrate 3;With,
Substrate 3, upper surface are coated with powder to be printed, protrude from 3 upper surface of substrate and pass through laser melting and fix It is connected with grid member 5;Grid lines in the grid member 5 is staggered, also, grid lines in the same direction is arranged in parallel.
The height of the grid member 5 is 0.02mm-0.4mm.
The height of the grid member 5 is 0.02mm-0.24mm.
In the grid member 5, the width of grid lines is 0.01-0.5mm.
The material identical for preparing material and powder to be printed of the grid member 5.
Grid member 5 by thermoforming and is fixed on the upper surface of substrate 3 by the laser that laser head 1 emits.
In the grid member 5, the size of single grid cell is (0.1~20mm) × (0.1~20mm);
In the grid member 5, single size of mesh opening is 3mm × 3mm.
Laser head 1 launches laser, is radiated on grid member 5 and the powder to be printed of 3 top of substrate, powder is in laser It acts on lower heat fusing and is formed by curing setting workpiece, the workpiece and the grid cell of grid member 5 are affixed.
Advantageous effect includes possessed by the utility model:
(1) in 3D printing, by adding grid member in substrate surface, the surface roughness of substrate is considerably increased, is increased Add friction of the powder during being coated between substrate, and then improve being coated with property and uniformity of the powder on substrate, into This cheap, significant effect;
(2) therefore the material identical for preparing material and powder to be printed of the grid member, will not cause the dirt of product Dye, ensure that the quality and cleannes of product;
(3) substrate 3 with grid member 5 that is provided in the utility model prepares simple and easy, improves being coated with property of powder It is with obvious effects, it will not excessively increase printing cost and time-write interval.
Description of the drawings
Fig. 1 shows that powder is on printing substrate upper berth in the raising 3D printing according to a kind of preferred embodiment of the utility model The structure diagram of the property covered and uniformity device;
Fig. 2 shows according to a kind of schematic cross-section of the substrate of preferred embodiment of the utility model;
Fig. 3 shows the position relationship schematic diagram of the substrate and scraper according to a kind of preferred embodiment of the utility model.
Drawing reference numeral explanation:
1- laser heads
2- scrapers
3- substrates
4- operating rooms
5- grid members
Specific embodiment
The utility model is further described below by drawings and examples.By these explanations, this practicality is new The characteristics of type and advantage will become more apparent from clearly.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary " Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the drawings In terms of kind, but unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other not Forming conflict can be combined with each other.
According to it is provided by the utility model it is a kind of raising 3D printing in powder device of being coated with property and uniformity on substrate, Described device includes laser head 1, scraper 2 and substrate 3.
As shown in Figure 1, having an operating room 4 in 3D printing device, the laser head 1 is set to utility model works The top of room 4;Laser head 1 can be to 4 internal emission laser of operating room, and according to preset program, constantly changes laser Moving direction and position.
Scraper 2 is set to the lower section of operating room 4, and positioned at the top of substrate 3.The substrate 3 is preferably rectangular, in order to just In description, in the utility model, as shown in Figure 3, the side parallel with 2 extending direction of scraper is short side in substrate 3, with scraper The parallel side of moving direction is long side.The scraper 2 combines shape by two length wing essentially identical with 3 short side of substrate Into intermediate in wing forms class v-shaped structure, and the bottom end of the class v-shaped structure has hole.Powder to be printed flows into class In v-shaped structure, and the hole for passing through bottom end gradually flows out.Scraper 2 moves horizontally, the direction of motion and the extending direction of scraper 2 Vertically, the powder of outflow is sprawled as plane by mechanicals efforts.In this way, by the reciprocating motion of scraper 2, will constantly flow into Powder to be printed in class v-shaped structure is gradually coated in the upper surface of substrate 3.
During 3D printing, by the powder of laser projection to 3 upper surface of substrate region to be printed, powder is in laser Under irradiation, local moment is heated thawing, and powder granule is melted into one.By laser head 1 constantly change laser direction and Position so that powder is shaped to grid or workpiece according to preset program melted by heating.
In the utility model, the powder is metal-powder, such as stainless steel powder, Al alloy powder, the powder is in 3D In printing can melt molding be the workpiece for setting shape and structure.
In the utility model, substrate 3 is horizontally disposed, to ensure that the powder being coated on the substrate 3 will not be in dead weight condition Lower flowing;The scraper 2 is set basically perpendicular to substrate 3 so that treats that powdering body is being conducted oneself with dignity in class v-shaped structure between wing Under the conditions of can constantly downwards hole outflow.The lower end of scraper 2 is set with interval, powder outflow with the upper surface of substrate 3 Afterwards, after being handled by the mobile powdering of scraper 2, the thickness powder layer identical with the setting interval numerical value is formed.It is scraped by setting The interval of 2 lower end of knife and 3 upper surface of substrate, so that it is determined that being coated with the thickness of individual layer powder.
0.1~120 μm, preferably 20~80 μm are divided between the lower end of scraper 2 and the upper surface of substrate 3.It is described The powder of thickness enables to heat to reach the bottom of this layer of powder when laser heats, and by the molding workpiece of melting and solidification with Substrate 3 or the melting of the workpiece of lower floor are affixed, improve the compactness of product.
After scraper 2 completes the operation of single powdering in the upper surface of substrate 3, being parked in does not influence Laser emission and powder sintering Region.The upper surface of substrate 3 is entirely coated with the powder of one layer of setting thickness, and laser head 1 swashs according to setting program, transmitting The powder that light heats region to be printed makes its melt molding.
After the powder in this layer of region to be printed carries out laser heating melting and solidification forming according to preset program, base Plate 3 declines, and the distance of decline and 2 lower end of scraper set are identical with the interval of 3 upper surface of substrate;And the height of scraper 2 is kept Constant, in this way, when in scraper 2 again powdering operation, the powder thickness being coated with is still setting thickness.
In the 3D printing equipment of two-way powder laying, scraper 2 again with treat powdering body on the substrate 3 side along and previous powdering The negative direction level in direction at the uniform velocity returns to previous powdering position;In the printing device of unidirectional powdering, scraper 2 is square on the substrate 3 Along and the negative direction constant level in previous powdering direction return to initial powdering position, then with treating powdering body along former powdering direction Level at the uniform velocity moves, and powder is entirely coated with again in the upper end of substrate 3;Again after the completion of powdering, laser is again according to pre- The program first set carries out heating melt molding to the powder to be printed of print area.
Scraper 2 moves back and forth in the upper surface of substrate 3 and carries out powdering operation, is constantly coated with setting in the upper surface of substrate 3 The powder to be printed of thickness;By scraper 2 and the blocked operation of laser 1, the growth of printing workpiece is realized.
The scraper 2 generally rests against the top at 3 edge of substrate, will not interfere laser after each powdering operates Movement of the laser of first 1 transmitting on powder.
The substrate 3 provides support, by scraper 2 in the upper of substrate 3 in the lower section of laser head 1 and scraper 2 for powder End layer layer powdering is simultaneously molded powder melted by heating in region to be printed by laser heating so that the shaping workpiece being prepared is consolidated It is connected on the upper surface of substrate 3.
The upper surface of the substrate 3 is connected with grid member 5, and the grid member 5 is formed by grid lines is interlaced, wherein, Grid lines is solid parts, passes through the different interlaced formation grid frames of grid lines.
As shown in Figure 2, the grid member 5 protrudes from the upper surface of substrate 3, the height of grid lines in preferred grid part 5 It is identical.In this way, the substrate 3 with the grid member 5 has mutually level horizontal plane, when scraper 2 moves horizontally powdering, Neng Gou The uniform powder of upper end laying depth of substrate 3.
In a preferred embodiment, as shown in figure 3, the grid lines in grid member 5 is mutually perpendicular to be staggered to form tool There is the mesh of certain height.
Numerous grid cells that grid lines is staggered to form in grid member 5 increase the roughness on 5 surface of grid member, lead to Grid member 5 and friction of the powder in being coated with are crossed, improves the being coated with property and uniformity of powder on the substrate 3.
In the grid member 5, it is also provided in the grid cell that grid lines is staggered to form and contour its of grid member 5 His component so that the surface roughness of grid member 5 increases, so as to increase friction of the powder with grid member 5 during being coated with, And then improve the being coated with property and uniformity of powder on the substrate 3.
Substrate 3 is usually reused in 3D printing, and surfacing is smooth thereon, in order to reduce grid member 5 to substrate 3 Damage, it is preferred that after the bottom end heating melting of the grid member 5, be connected as one with substrate 3.
In a preferred embodiment, the grid member 5 is incited somebody to action after heating powder by the laser that laser head 1 emits Gradually heat fusing is molded and is fixed on the upper surface of substrate 3 for it.In order to reduce damage of the grid member 5 to substrate 3, it is preferred that It can be formed under conditions of grid member 5, the laser energy for the laser that laser head 1 emits is the smaller the better.
Grid member 5 and substrate 3, for example, it may be this mode fixes grid member 5 and substrate 3:
After scraper 2 moves progress single powdering operation in the upper surface of substrate 3, laser head 1 launches laser, and is radiated at On the powder in 3 surface Dai Da regions of substrate, powder granule moment be heated thawing and 3 surface cure of substrate be molded, laser according to The grid member printing path movement of setting, powder is melted and is molded the first layer grid that grid member 5 is prepared;First layer grid After formation, laser head 1 is launched laser continuation and is radiated at set by 3 surface of substrate according to preset workpiece print routine On the corresponding region powder to be beaten of fixed workpiece, which, which is heated, melts and in 3 surface of substrate and cured forming Grid member on curing molding, become the first layer for preparing workpiece.
Then scraper 2 is in the mobile progress powdering operation again of the surface covered with first layer grid and the substrate 3 of workpiece, paving After the completion of powder, laser head 1 launches laser, is moved according to the grid member printing path of setting, is radiated at established first layer On the powder of grid and workpiece surface, powder moment be heated thawing and with first layer grid and workpiece curing molding, so as to fulfill The growth of the second layer grid of grid member 5;After second layer grid protocol, laser head 1 is launched laser and is continued according to pre- The workpiece print routine first set is radiated on the corresponding region powder to be beaten of workpiece on first layer grid and workpiece surface, the area Domain powder moment be heated thawing and the curing molding on the first layer grid and first layer workpiece with cured forming, be prepared The second layer of workpiece.The height of grid member 5 gradually increases with printing workpiece with the progress of print progress together, 5 He of grid member Workpiece synchronizes to be formed.
It repeats to terminate after above-mentioned action respectively grows into preset height to grid member 5 and workpiece.
Preferably, the height of grid member 5 is 1-5 printing thickness, and further, the height of grid member 5 is 1-3 printing Thickness;The printing thickness is exactly the thickness of powder being coated in powdering operation.
It is therefore preferable that the height of the grid member 5 is 0.02mm-0.4mm;More preferably 0.02mm-0.24mm.The height The grid member 5 of degree under the premise of satisfaction is coated with requirement, can reduce the forming material requested of grid and the time that forming is required, Reduce the cost of manufacture of substrate 3.Can also the height of grid member 5 adaptively be adjusted according to the mobility of different powder body materials.
Grid lines is numerous in grid member 5, it is therefore preferable that the line width of the grid lines in grid member 5 is 0.01-0.5mm, it is described Width can reduce the curring time of grid, reduce printing cost, and formed grid member can also be made to play 3 surface of increase substrate The effect of roughness increases friction of the powder during being coated between substrate 3, improve powder being coated with property on the substrate 3 and Uniformity.The line width of the grid member 5 can also adaptively adjust grid member 5 according to the difference of powder body material mobility Line width.
When scraper moves filling powder in 5 upper surface of grid member, since grid frame increases the coarse journey on 3 surface of substrate Degree, increases the rubbing action of powder and substrate 3, so that powder is equably coated on the surface of substrate 3.
Preferably, in the grid member 5, the distance between grid lines of parallel distribution is equal, in this way, in grid member 5 Numerous grid cell sizes it is identical, be evenly distributed so that the grid frictional force that powder is subject to during powdering is also more equal Even, further improve powder is coated with uniformity.
Grid cell in grid member 5 becomes accommodation space, and the powder on substrate 3 is deposited in the accommodation space.It is described In grid member 5, the size of grid cell can do the variation of adaptability, powder fluidity according to the mobility of different powders When preferable, grid can be not provided with or increase macroreticular area;When powder fluidity is poor, grid area can be set smaller.
For example, when being printed using the excellent stainless steel powder of mobile performance, it can be by the area of single grid cell It is set as 0, that is, does not have to increase print grid part 5 in surface;And when being printed using the poor powder of mobile performance, it is single The size of a grid cell is 0~20mm × 0~20mm, such as carries out 3D printing, the grid cell using aluminium alloy powder Area be 3mm × 3mm.
In the grid member 5, extending direction and the 2 moving direction institute angle degree of scraper of grid lines can be converted freely, The angle does not interfere with grid and performance is coated with to powder, such as the angle is in 30 °;Alternatively, the extending direction of grid lines with Scraper moving direction is identical.
For more convenient setting grid member 5, the setting of preferred grid line vertical interlaced, also, the extension side of grid lines Include but not limited to 30~45 ° to scraper moving direction institute angle degree (acute angle).
The flat shape of the grid member 5, shape, the size of size and 3D printing converted products are adapted, such as Fig. 2 In, the area of the grid member 5 is less than substrate 3;In another embodiment, as shown in figure 3, the grid member 5 and substrate 3 Size it is identical, substrate 3 is completely covered grid member 5.This not only expands the scope of application of grid member 5, also shortens grid Time-write interval of part 5 and cost-effective.
In substrate 3 provided by the utility model, grid member 5 is particularly provided with, the grid member 5 is printed in workpiece It is gradually formed together with workpiece in the process.Which increase the frictional force of powder and substrate 3 so that powder is coated with substrate 3 Uniformity is significantly improved, and the shaping workpiece compactness and mechanical property printed is obviously improved.
In the utility model, preferably described grid member 5 and the material identical of powder to be printed, in this way, printing Cheng Zhong, preparing material and will not being polluted to shaping workpiece for grid member 5, ensure that the quality and cleanliness factor of shaping workpiece.
Powder device of being coated with property and uniformity on substrate in a kind of raising 3D printing provided by the utility model, it is described Device can effectively improve the being coated with property and uniformity of powder in print procedure, improve the compactness and mechanical property of shaping workpiece Matter, simultaneously, it is ensured that the cleannes of shaping workpiece will not pollute in print procedure.
The fingers such as " on ", " under ", " interior ", " outer " " preceding " " rear " it should be noted that term in the description of the present invention, The orientation or position relationship shown is based on the orientation or position relationship under utility model works state, is for only for ease of description The utility model and simplified description rather than instruction imply that signified device or element must be with specific orientation, Yi Te Fixed azimuth configuration and operation, therefore it is not intended that limitation to the utility model.In addition, term " first ", " second ", " third ", " the 4th " are only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " connected " " connection " should broadly understood, for example, it may be fixedly connected or be detachably connected or one connection Commonly;Can be mechanical connection or electrical connection;Can be directly connected to, can also be indirectly connected with by intermediary, It can be the connection inside two elements.For the ordinary skill in the art, can above-mentioned art be understood with concrete condition Concrete meaning of the language in the utility model.
The utility model is illustrated above in association with preferred embodiment, but these embodiments are only models Example property, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the utility model, these It each falls in the scope of protection of the utility model.

Claims (9)

1. improve powder device of being coated with property and uniformity on printing substrate in 3D printing, which is characterized in that the device includes:
The powder to be printed being coated with above substrate (3) is heated by laser head (1) by emitting laser according to the shape of setting Type;With,
Scraper (2) moves back and forth to carry out powdering operation to the upper surface of substrate (3) in the top of substrate (3);With,
Substrate (3), upper surface are coated with powder to be printed, protrude from substrate (3) upper surface and pass through laser melting and fix It is connected with grid member (5);
Wherein, the grid lines in the grid member (5) is staggered, also, grid lines in the same direction is arranged in parallel.
2. the apparatus according to claim 1, which is characterized in that the height of the grid member (5) is 0.02mm-0.4mm.
3. device according to claim 1 or 2, which is characterized in that the height of the grid member (5) is 0.02mm- 0.24mm。
4. device according to claim 3, which is characterized in that in the grid member (5), the line width of grid is 0.01- 0.5mm。
5. device according to claim 4, which is characterized in that the grid member (5) prepares material and powder to be printed The material identical of body.
6. device according to claim 5, which is characterized in that grid member (5) is heated by the laser that laser head (1) emits It is molded and is fixed on the upper surface of substrate 3.
7. device according to claim 6, which is characterized in that in the grid member (5), the size of single grid cell is (0.1~20mm) × (0.1~20mm).
8. device according to claim 7, which is characterized in that in the grid member (5), single size of mesh opening for 3mm × 3mm。
9. device according to claim 8, which is characterized in that laser head (1) launches laser, is radiated on substrate (3) In the grid member (5) of side and powder to be printed, powder heat fusing and is formed by curing setting workpiece under laser action, the work Part and the grid cell of grid member (5) are affixed.
CN201721651709.3U 2017-12-01 2017-12-01 Improve powder device of being coated with property and uniformity on printing substrate in 3D printing Active CN207464196U (en)

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CN201721651709.3U CN207464196U (en) 2017-12-01 2017-12-01 Improve powder device of being coated with property and uniformity on printing substrate in 3D printing

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Application Number Priority Date Filing Date Title
CN201721651709.3U CN207464196U (en) 2017-12-01 2017-12-01 Improve powder device of being coated with property and uniformity on printing substrate in 3D printing

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110438495A (en) * 2019-09-12 2019-11-12 广东海洋大学 A kind of powdering method and device for laser melting coating
CN114131050A (en) * 2021-12-13 2022-03-04 深圳市华阳新材料科技有限公司 Unsupported 3D printing method
CN114378917A (en) * 2021-12-23 2022-04-22 集美大学 A liquid level adjustable large-format paste 3D printing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110438495A (en) * 2019-09-12 2019-11-12 广东海洋大学 A kind of powdering method and device for laser melting coating
CN114131050A (en) * 2021-12-13 2022-03-04 深圳市华阳新材料科技有限公司 Unsupported 3D printing method
CN114378917A (en) * 2021-12-23 2022-04-22 集美大学 A liquid level adjustable large-format paste 3D printing method
CN114378917B (en) * 2021-12-23 2024-01-05 集美大学 Large-format slurry 3D printing method capable of adjusting liquid level

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