CN109501249A - A kind of variable cross-section aperture grid support construction and its generation method - Google Patents
A kind of variable cross-section aperture grid support construction and its generation method Download PDFInfo
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- CN109501249A CN109501249A CN201811513510.3A CN201811513510A CN109501249A CN 109501249 A CN109501249 A CN 109501249A CN 201811513510 A CN201811513510 A CN 201811513510A CN 109501249 A CN109501249 A CN 109501249A
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- support unit
- support
- aperture grid
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 32
- 210000005056 cell body Anatomy 0.000 claims description 38
- 210000004027 cell Anatomy 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000012805 post-processing Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
Abstract
The invention discloses a kind of variable cross-section aperture grid support construction and its generation methods, by forming aperture grid support unit by the grid cell volume array of multiple and different sizes, it is superimposed again by excessively a aperture grid support unit and forms the form that support unit changes support, it is equipped with the grid aperture through aperture grid support unit in the horizontal direction in aperture grid support unit side wall and forms lateral powder channel, so as to make to support powder inside fully erased after forming, the powder inside support is set to be recycled before heat treatment after forming parts, and improve printing rate, reduce post-processing difficulty, cross-sectional structure is formed using three-dimensional graphics software, and array and arrangement are carried out to support according to demand, the internal powder that can not be cleared out of conventional mesh support is cleaned up completely, reduce the powder usage amount of forming, laterally go out powder Lattice support setting print speed faster, shorten curring time, improve efficiency, reduce cost.
Description
Technical field
The present invention relates to the support in selective laser melting forming technique, specially a kind of variable cross-section aperture lattice support
Structure and its generation method.
Background technique
Selective laser melting forming technique is a kind of quick increasing material manufacturing forming technique, using laser heat source, after powdering
Successively accumulation, fast implements the near-net-shape of high complexity part.It is hanging at it to give the manufacturing process needs that it is successively accumulated
Face, rib, point and can not self-supporting forming feature add lattice support, to guarantee that part smoothly shapes, while reaching it and wanting
The surface roughness and dimensional accuracy asked.
Existing lattice support is as depicted in figs. 1 and 2, is perpendicular for the lattice support form carried in support addition software
To grid, the only size of the single grid cell of adjustable grid and the spacing of grid cell.It is shaped simultaneously with part, up and down or
It connect with part, or is connect with substrate, after forming, the powder in grid can not be removed, and cause waste of material, and cost increases
Add.After heat treatment, powder fuses into one with lattice support, increases post-processing difficulty.
Summary of the invention
The purpose of the present invention is to provide a kind of variable cross-section aperture grid support constructions and its generation method, structure simply to have
Effect, in process of production, reduces the loss of raw material, improves printing effect, reduce post-processing difficulty.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of variable cross-section aperture grid support construction, including the multiple aperture lattice support lists being sequentially overlapped along the vertical direction
Member, by multiple grid cell bodies, array forms each aperture grid support unit in the horizontal direction, and grid cell body is along perpendicular
To the hollow tubular structure of setting, aperture grid support unit side wall is equipped in the horizontal direction through aperture grid support unit histogram
The grid cell body size of grid aperture, multiple aperture grid support units along the vertical direction is sequentially increased, two neighboring
The grid cell body of lower layer's aperture grid support unit of aperture grid support unit) in formed be used to support upper layer aperture grid
The supporter of support unit, supporter are arranged along the vertical direction, form matrix pattern structure with grid cell body.
Further, the grid cell body ruler of lower layer's aperture grid support unit of two neighboring aperture grid support unit
Very little 2 times for upper layer aperture grid support unit grid cell body.
Further, grid cell body is rectangular configuration.
Further, upper one layer of grid cell body preferred dimension of adjacent two layers grid cell body is the square of a, adjacent
Next layer of grid cell body preferred dimension be 2a square.
Further, the minimum grid unit a for the first layer aperture lattice support connecting with part elongated is 0.6-
1.0mm。
Further, the height of gusseted piece along the vertical direction is upper layer gusseted piece side length adjacent thereto.
Further, the first layer aperture grid support unit supports height connecting with part is 3-5mm.
A kind of variable cross-section aperture grid support construction forming method, comprising the following steps:
Step 1) need to add support part in the importing of three-dimensional graphics software, and determine part puts and need to add support
Projected area；
Step 2), the region for needing to add support in part, a net of aperture grid support unit is generated by drawing
The cross section structure of lattice cell cube, scanning cross-section structure forms blank pipe in the vertical direction, in the horizontal direction array grid unit
Body forms aperture grid support unit；
Step 3) generates supporter in the grid cell body of aperture grid support unit, is generating branch according to step 2)
The aperture grid support unit upper end of support body continues to generate upper layer aperture grid support unit, repeats step 2) to step 3), shape
At support construction.
Further, after step 2) forms aperture grid support unit, in the horizontal direction in aperture grid support unit
Excision is stretched on vertical plane forms powder channel.
Compared with prior art, the invention has the following beneficial technical effects:
A kind of variable cross-section aperture grid support construction of the present invention, passes through the grid cell body by multiple and different sizes
Array forms aperture grid support unit, then is superimposed by excessively a aperture grid support unit and forms the shape that support unit changes support
State is equipped with the grid aperture through aperture grid support unit in aperture grid support unit side wall in the horizontal direction and is formed laterally
Powder channel, so as to make after forming support powder inside it is fully erased, enable support inside powder part at
It is recycled before heat treatment after type, and improves printing rate, reduce post-processing difficulty, it can not be clear by conventional mesh support inside
Powder out cleans up completely, reduces the powder usage amount of forming, and print speed is arranged faster in the lattice support of lateral powder out,
Curring time is shortened, is improved efficiency, cost is reduced.
A kind of variable cross-section aperture grid support construction generation method of the present invention forms cross section using three-dimensional graphics software and ties
Structure, and array and arrangement are carried out to support according to demand, it satisfies the use demand, and completion can be exported together with part data
Synchronous forming, and when generation is arranged, directly support unit is carried out reinforcing ensure that its support effect, forms aperture grid
After support unit, excision is stretched on the vertical plane of aperture grid support unit in the horizontal direction and forms powder channel, makes to support
Internal powder can be recycled before heat treatment after forming parts, reduce the powder usage amount of forming.
Detailed description of the invention
Fig. 1 is lattice support structural schematic diagram in the prior art.
Fig. 2 is the supporting surface structure of lattice support structure in the prior art.
Fig. 3 is variable cross-section aperture grid support construction schematic diagram.
Fig. 4 is grid cell body structural schematic diagram.
Fig. 5 is aperture grid support unit schematic diagram.
Fig. 6 is supporting body structure schematic diagram.
Fig. 7 is Fig. 6 partial enlargement diagram.
Fig. 8 is variable cross-section transition schematic diagram.
Fig. 9 is variable cross-section transition top view.
Figure 10 is variable cross-section transition cross-sectional view.
In figure, 1, aperture grid support unit；2, grid cell body；3, grid aperture；4, supporter.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in figs. 3 and 5, a kind of variable cross-section aperture grid support construction of the present invention, including along the vertical direction according to
Multiple aperture grid support units 1 of secondary superposition, each aperture grid support unit 1 is by multiple grid cell bodies 2 along level
Direction array forms, and grid cell body 2 is the hollow tubular structure being arranged along the vertical direction, and 1 side wall of aperture grid support unit is along water
Square to be equipped with through aperture grid support unit 1 grid aperture 3, formed powder channel, multiple apertures along the vertical direction
2 size of grid cell body of lattice support unit 1 is sequentially increased, lower layer's open cell mesh of two neighboring aperture grid support unit 1
2 times having a size of 1 grid cell body 2 of upper layer aperture grid support unit of the grid cell body 2 of lattice support unit 1；Grid cell
Body 2 is rectangular configuration, it is preferred that as shown in figure 4,2 preferred dimension of upper one layer of grid cell body is the square of a, under adjacent
The square that one layer of 2 preferred dimension of grid cell body is 2a；
It is transition section layer between two neighboring aperture grid support unit 1, two neighboring as shown in Fig. 6 to Figure 10
Supporter 4 is formed in lower layer's aperture grid support unit 1 of aperture grid support unit 1, supporter is arranged along the vertical direction, uses
In support upper layer aperture grid support unit 1, this preferred embodiment is as shown, supporter 4 is gusseted piece, gusseted
Piece is set in the grid cell body 2 of lower layer's aperture grid support unit 1, is formed matrix pattern structure with grid cell body 2, is realized
Lattice support variable cross-section, to support upper one layer of grid cell body 2；As shown in figure 8, the height of gusseted piece along the vertical direction
For upper layer gusseted piece side length adjacent thereto；
The first layer aperture grid bearing height connecting with part is 3-5mm, it is ensured that surface quality after part forming and
Dimensional accuracy meets customer requirement；
The minimum grid unit a for the first layer aperture lattice support connecting with part elongated is 0.6-1.0mm.
The size of grid aperture meets print procedure stable formation；
Meanwhile the present invention is variable cross-section support construction, with the increase of the variable cross-section number of plies, grid minimum unit can realize 2n
Multiple increases.Grid minimum cell size increases, and the path of laser scanning is shorter when printing, and print speed is faster.It shortens into
It the shape time, improves efficiency, reduces cost.
A kind of generation method of variable cross-section aperture grid support construction of the present invention, comprising the following steps:
Step 1) need to add support part in the importing of three-dimensional graphics software, and determine part puts and need to add support
Projected area；
Step 2), the region for needing to add support in part, a net of aperture grid support unit 1 is generated by drawing
The cross section structure of lattice cell cube 2, scanning cross-section structure forms blank pipe in the vertical direction, in the horizontal direction array grid unit
Body 2 forms aperture grid support unit 1；
Step 3) generates supporter 4 in the grid cell body 2 of aperture grid support unit 1, is being generated according to step 2)
1 upper end of aperture grid support unit of supporter 4 continues to generate upper layer aperture grid support unit 1, repeats step 2) to step
3) support construction, is formed.
After step 2) forms aperture grid support unit 1, in the horizontal direction on the vertical plane of aperture grid support unit 1
It stretches excision and forms powder channel.
While forming parts, the support construction and part obtained according to step 3) is integrally formed, complete after forming parts
The support of pairs of part, and by the powder in support construction after being poured out in powder channel, then carry out subsequent processing.
By forming aperture grid support unit by the grid cell volume array of multiple and different sizes, then by excessively a open cell mesh
Lattice support unit is superimposed to form the form that support unit changes support, is equipped in the horizontal direction in aperture grid support unit side wall
Grid aperture through aperture grid support unit forms lateral powder channel, so as to make to support powder inside after forming
It is fully erased, so that the powder inside support is recycled before heat treatment after forming parts, and improve printing rate, drop
Low post-processing difficulty cleans up the internal powder that can not be cleared out of conventional mesh support completely, and the powder for reducing forming uses
Amount, the lattice support setting print speed of lateral powder out faster, shorten curring time, improve efficiency, reduce cost.
A kind of variable cross-section aperture grid support construction generation method of the present invention forms cross section using three-dimensional graphics software and ties
Structure, and array and arrangement are carried out to support according to demand, it satisfies the use demand, and completion can be exported together with part data
Synchronous forming, and when generation is arranged, directly support unit is carried out reinforcing ensure that its support effect, forms aperture grid
After support unit, excision is stretched on the vertical plane of aperture grid support unit in the horizontal direction and forms powder channel, makes to support
Internal powder can be recycled before heat treatment after forming parts, reduce the powder usage amount of forming.
Claims (9)
1. a kind of variable cross-section aperture grid support construction, which is characterized in that including the multiple apertures being sequentially overlapped along the vertical direction
Lattice support unit (1), each aperture grid support unit (1) by multiple grid cell bodies (2) in the horizontal direction array and
At grid cell body (2) is the hollow tubular structure being arranged along the vertical direction, and aperture grid support unit (1) side wall is in the horizontal direction
Equipped with the grid aperture (3) for running through aperture grid support unit (1)；Multiple aperture grid support units (1) along the vertical direction
Grid cell body (2) size be sequentially increased, in lower layer's aperture lattice support list of two neighboring aperture grid support unit (1)
The supporter (4) for being used to support upper layer aperture grid support unit (1), supporter are formed in the grid cell body (2) of first (1)
(4) it is arranged along the vertical direction, forms matrix pattern structure with grid cell body (2).
2. a kind of variable cross-section aperture grid support construction according to claim 1, which is characterized in that two neighboring open cell mesh
The grid cell body (2) of lower layer's aperture grid support unit (1) of lattice support unit (1) is having a size of upper layer aperture lattice support list
2 times of first (1) grid cell body (2).
3. a kind of variable cross-section aperture grid support construction according to claim 2, which is characterized in that grid cell body (2)
For rectangular configuration.
4. a kind of variable cross-section aperture grid support construction according to claim 3, which is characterized in that supporter (4) is perpendicular
The gusseted piece being directly arranged, gusseted piece are set in the grid cell body (2) of lower layer's aperture grid support unit (1),
Matrix pattern structure is formed with grid cell body 2.
5. a kind of variable cross-section aperture grid support construction according to claim 4, which is characterized in that gusseted piece is along perpendicular
Histogram to height be upper layer gusseted piece side length adjacent thereto.
6. a kind of variable cross-section aperture grid support construction according to claim 1, which is characterized in that connect with part
The a length of 0.6-1.0mm of minimum grid element sides of one layer of aperture lattice support.
7. a kind of variable cross-section aperture grid support construction according to claim 1, which is characterized in that connect with part
One layer of aperture grid support unit (1) bearing height is 3-5mm.
8. a kind of variable cross-section aperture grid support construction forming method, which comprises the following steps:
Step 1) need to add support part in the importing of three-dimensional graphics software, determine the projection of part put and need to add support
Area；
Step 2), the region for needing to add support in part, a grid of aperture grid support unit (1) is generated by drawing
The cross section structure of cell cube (2), scanning cross-section structure forms blank pipe in the vertical direction, in the horizontal direction array grid unit
Body (2) forms aperture grid support unit (1)；
Step 3) generates supporter (4) in the grid cell body (2) of aperture grid support unit (1), according to step 2) in life
Continue to generate upper layer aperture grid support unit (1) at aperture grid support unit (1) upper end of supporter (4), repeats step
2) to step 3), support construction is formed.
9. a kind of variable cross-section aperture grid support construction forming method according to claim 8, which is characterized in that step 2)
After forming aperture grid support unit (1), excision shape is stretched on the vertical plane of aperture grid support unit (1) in the horizontal direction
At powder channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811513510.3A CN109501249B (en) | 2018-12-11 | 2018-12-11 | Variable-section open-pore grid supporting structure and generation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811513510.3A CN109501249B (en) | 2018-12-11 | 2018-12-11 | Variable-section open-pore grid supporting structure and generation method thereof |
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| Publication Number | Publication Date |
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| CN109501249B CN109501249B (en) | 2024-02-23 |
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Cited By (5)
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| CN110435143A (en) * | 2019-09-02 | 2019-11-12 | 广东省新材料研究所 | A kind of 3D printing porous support structure |
| CN110802837A (en) * | 2019-10-31 | 2020-02-18 | 共享智能装备有限公司 | FDM printing product supporting structure and printing method |
| CN111633207A (en) * | 2020-04-27 | 2020-09-08 | 鑫精合激光科技发展（北京）有限公司 | Heat dissipation device and application thereof |
| CN112338203A (en) * | 2020-11-09 | 2021-02-09 | 浙江天雄工业技术有限公司 | Powder recycling method, conformal powder supporting structure and design method thereof |
| CN114951693A (en) * | 2022-04-15 | 2022-08-30 | 中国航发北京航空材料研究院 | Selective laser melting forming method for part with small-size special-shaped hole |
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| CN112338203A (en) * | 2020-11-09 | 2021-02-09 | 浙江天雄工业技术有限公司 | Powder recycling method, conformal powder supporting structure and design method thereof |
| CN112338203B (en) * | 2020-11-09 | 2023-03-07 | 浙江天雄工业技术有限公司 | Method for recycling powder |
| CN114951693A (en) * | 2022-04-15 | 2022-08-30 | 中国航发北京航空材料研究院 | Selective laser melting forming method for part with small-size special-shaped hole |
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