CN106180708B - Controlled pore reticular supporting structure in metal increasing material manufacturing and preparation method thereof - Google Patents
Controlled pore reticular supporting structure in metal increasing material manufacturing and preparation method thereof Download PDFInfo
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- CN106180708B CN106180708B CN201610526380.1A CN201610526380A CN106180708B CN 106180708 B CN106180708 B CN 106180708B CN 201610526380 A CN201610526380 A CN 201610526380A CN 106180708 B CN106180708 B CN 106180708B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/40—Structures for supporting workpieces or articles during manufacture and removed afterwards
- B22F10/47—Structures for supporting workpieces or articles during manufacture and removed afterwards characterised by structural features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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- 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
- B33Y10/00—Processes of additive manufacturing
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
Controlled pore reticular supporting structure in metal increasing material manufacturing and preparation method thereof, controlled pore support construction are in contact with substrate part with the supporting surface contact portion of molded part, intermediate body portion and lower part including top；The intermediate body portion is made of multiple porous element bodies, and the porous element body is big octahedral unit structure, and the big octahedral unit structure is spliced to form by eight first poles；It is in contact with substrate the straight-bar that the node for the porous element body that part is outside extends downwardly；The described extension upward with the vertex of molded part supporting surface contact portion is the top porous element body, the extension are small octahedral unit structure and the thin bar connecting with molded part；The thin bar is generated from the vertex of big octahedral unit structure and small octahedral unit structure；The top surface diameter of the thin bar is less than basal diameter, and the upper end of the thin bar is protruded into inside molded part.
Description
Technical field
The present invention relates to the controlled pore reticular supporting structures and preparation method thereof in a kind of metal increasing material manufacturing, main to use
The support of arbitrarily complicated curved surface during metal increasing material manufacturing belongs to the advanced manufacture of laser to guarantee the Forming Quality of part
In rapid shaping field.
Background technique
When metal increasing material manufacturing forming metal parts, addition support construction, and the addition manner pair supported are required substantially
The quality of metal increasing material manufacturing forming metal parts influences very big.Laser beam snap action makes in metal increasing material manufacturing forming process
It obtains fusion of metal powder and forms molten bath, if the not support of metal solid, molten bath will be in the work of self gravity and capillary force
The defects of sinking in powder under, forming viscous powder, dross influences the molding of part when serious.On the other hand, metal solid
It big 100 times of the pyroconductivity of thermal conductivity ratio metal powder or so, if there is no solid support structure when molding draping face, is equivalent to
Powder support, this results in energy that cannot quickly spread by heat transfer, so that the excessive gas for causing metal powder of energy
Phenomena such as change, burning.During metal increasing material manufacturing, since laser is snap action in regional area, metal powder be experienced
It is brought rapidly up the process of fusing cooled and solidified, this results in temperature gradient big, so that generating internal stress occurs buckling deformation.And it props up
The presence of support structure limits the buckling deformation of forming part.In conclusion support construction in metal increasing material manufacturing forming process
Be it is indispensable, basic function is as follows: 1. play the role of support molded part.2. the buckling deformation for preventing molded part.3.
The generation for the defects of preventing molded part gasification, burning, viscous powder, dross.
In general present metal increasing material manufacturing forming process supporting type a little support, line support, mesh-supported,
Flat porous support etc..Point support is connect in the form of point contact with forming part, and a thickness for support pole can be set, connect
The thickness of contact portion point.Advantage is that molded part is easily removed a support construction, if disadvantage is to support pole too thin, and supporting surface
When far from horizontal position, cause to support pole not only thin but also long, support the rigidity of itself inadequate, it is easily deformable.If increasing support
Size can then waste material.The advantage of line support is that the support of crypto set on a line can be connect by adjusting
The size of tooth is touched to control the contact area with forming part.But line support can only be on a direction, and line support
Waste material.Mesh-supported combines the advantages of line support, and the shape of connecting shaping part carrys out the support of reasonable Arrangement line, but line supports
The shortcomings that still remain.Flat porous support is that porous structure is designed in the structure supported online, so that the entity portion of line support
Divide hollow out, which reduces the consumption of material, support strength are also reduced, so that being easily removed when post-processing.Although these
Support construction has the advantages that respective, but disadvantage still remains.Traditional support construction shortcoming is as follows: 1, needing long
It is not intensity is not enough exactly that material wastes very much when support construction.2, lack the support construction in space to meet different shape difference
The support of position is added.3, support removeability it is too poor, be not easy after forming parts removal support, cause subsequent processing it is time-consuming,
Arduously.
The purpose of support addition is that molded part is enable smoothly to form, and does not occur the defects of buckling deformation, dross, burning,
Equally also to guarantee the Forming Quality of overhung structure.And select the density of what kind of support, support addition to forming metal parts
It influences very big.So the support construction of optimization should have following main points: 1, support and molded part contact area are reasonable,
Molded part should can be supported, dross defect is prevented.The heat for enabling energy to pass through metal solid again passes
It leads and scatters and disappears, prevent burning defect.2, the supported amount contacted with molded part is enough, to prevent the warpage of molded part from becoming
Shape.3, the support contacted with molded part cannot be too thick, and intensity cannot be too big, to be conducive to the removal of subsequent support.4, support is intermediate
Part will have enough intensity to prevent support self-deformation, and the damage of material is reduced as far as under the premise of intensity is enough
Consumption, is also beneficial to the removal of subsequent support.5, support construction will adapt to the shape of molded part, position, increase the suitable of support construction
The property used.
Due to the indispensable property of support construction, in conjunction with the advantages of conventional support structure, its disadvantage is removed, designs optimization
Metal increasing material manufacturing support construction be of great significance.
Summary of the invention
In order to overcome disadvantages mentioned above existing for existing metal increasing material manufacturing support construction, the present invention provides a kind of metal increasing material
Controlled pore reticular supporting structure in manufacture and preparation method thereof, the structure is with consumptive material is few, intensity is high, easy removal, adaptation
Property it is good the advantages that, and holey support construction use UG Parametric designing modeling method so that support design, addition,
Modification becomes the time for flexibly shortening supported design, support addition；And the ease of removal of support construction makes mold zero
Part has better Forming Quality.The technical solution adopted by the present invention is that:
The production method of controlled pore reticular supporting structure in metal increasing material manufacturing, it is characterised in that: the production
Method is as follows:
S1, controlled pore reticular supporting structure is designed by UG parametric modeling method: uses the side of UG parametric modeling
The cell cube of method building controllable porous structure；Design the following parameter of initial setting: unit body length, cell cube width, cell cube
Four parameters of height and cell cube holder radius, after setting parameter, constrained in UG modeling using the parameter of setting；
It only needs to modify parameter when subsequent modification and can be achieved with the adjustment of cell cube size, porosity；
S2, the shape for needing to add supporting surface according to part, array goes out controlled pore reticular supporting structure, according to part
Height increases or decreases the number of cell cube；Supporting surface contact portion with molded part is extended from network cells body node
The thin bar gone out.
The point that S3, layout addition support: thin bar is drawn from supporting point, a part of thin bar puts in molded part, protrudes into molding
The length of part determines the bond strength between support and molded part；
S4, after determining the height of supporting point and thin bar, it is to support that each height of the point from substrate, which subtracts bearing height,
Cell cube overall height；The height and number of each cell cube are determined according to overall height；；After determining cell cube number,
Overall height is divided into set number of segment, every section of midpoint is the node of cell cube pole, and cell cube pole is from this node
Place generates；
S5, cell cube include big unit body and junior unit body, and the pole of small octahedral unit is from the pole of big unit body
Midpoint generates, and thin bar is generated from the vertex of big unit body and junior unit body.
The controlled pore support construction in metal increasing material manufacturing made according to production method described above, feature exist
In: part is in contact with substrate with the supporting surface contact portion of molded part, intermediate body portion and lower part including top；
The intermediate body portion is made of multiple porous element bodies, and the porous element body is big octahedral unit
Structure, the big octahedral unit structure are spliced to form by eight first poles；
It is in contact with substrate the straight-bar that the node for the porous element body that part is outside extends downwardly；
The described extension upward with the vertex of molded part supporting surface contact portion is the top porous element body
Point, the extension is small octahedral unit structure and the thin bar connecting with molded part；
The small octahedral unit is spliced to form by eight second poles, and described is arranged in second pole
The midpoint of one pole；The length of first pole is the half of the length of the second pole, and described is small octahedra single
The height of meta structure is the half of the height of big octahedral unit structure.
The thin bar is generated from the vertex of big octahedral unit structure and small octahedral unit structure；The thin bar
Top surface diameter be less than basal diameter, the upper end of the thin bar is protruded into inside molded part.
Further, the X-direction length of the big octahedral unit structure and Y-direction length and pole diameter dimension are adjustable
Section.
Further, the X-direction length of the big octahedral unit structure is 1.4mm~4mm, Y-direction length 1.4mm~
4mm, pole diameter dimension are 1.5mm~3mm.
Further, the height of the porous element body is 2mm~6mm.
Further, the top diameter, base diameter of the thin bar and height are adjustable, top diameter and base diameter setting
Range is 0.1mm~0.5mm, and it is 1mm~2mm. that range, which is arranged, in height
Further, it is 0.1mm~0.8mm that the thin bar, which protrudes into the setting range of the length inside molded part,.
The present invention devises 3 kinds of netted branch of different controlled pores according to the part shape that metal increasing material manufacturing is likely to occur
Support structure proposes the method for three kinds of support additions, specific as follows:
1, for the part of large area: devising the controlled pore reticular supporting structure of regular octahedron.The big portion of support construction
Sub-unit body is regular octahedron type, can be controlled by adjusting the height of cell cube, length, width and cell cube stent diameter
Make its porosity, intensity.This unit body size is larger, has reduced disappearing for material to the greatest extent under the premise of proof strength is enough
Consumption.And it is then smaller, closeer with the cell cube of molded part contact portion.This is the tiny pole and molding in order to guarantee to have enough
Part contact.The design method of junior unit body is that the center of big unit body rod is taken to extend pole, and pole length is big unit body
The half of pole length, height are also the half of big unit body height.Cell cube in this way with molded part contact portion is with regard to more
One times.And this controllable holey support construction can design junior unit according to the support density degree that oneself is needed
The division number of body.I.e. if desired more tiny poles are contacted with molded part, can be prolonged again from the center of junior unit body rod
Boom forms new small octahedron, thus the requirement of tiny pole needed for reaching.
2, for irregular small area part: devising another controlled pore reticular supporting structure, mentality of designing
The width of similar regular octahedron controlled pore reticular supporting structure, design cell body reduces, and eliminates extra pole.
3, for the surface of straight line class: combining the advantage of porous structure on the basis of straight support, devising straight line can
Control holey support construction.
Three kinds of support constructions set forth above can adapt to supporting surface of different shapes, use when supporting surface is large area
Octahedral porous support structure, and other two kinds of support constructions are then used in small area or marginal portion.The collocation of three kinds of supports
Using can be good at meeting different support demands, realizing that the support to arbitrary surface is added, increasing the suitable of support construction
Ying Xing.
Metal material of the invention is stainless steel, pure titanium, titanium alloy, cochrome.
The beneficial effects of the present invention are embodied in:
(1) present invention is designed modeling using UG parametrization, can quickly modify to holey support construction,
Save exploitation design time.
(2) reticulated porous structures are the strength and stability for guaranteeing support construction, and reduce the process time of support construction,
It improves efficiency.
(3) contact area of the controlled pore reticular supporting structure and molded part that design is reasonable, can play a supporting role,
The defects of dross, burning can be prevented again, guarantees Forming Quality.
(4) supported amount that the controlled pore reticular supporting structure designed is contacted with molded part can be increased according to demand
Subtract, realizes support density controllable function.The buckling deformation of molded part is prevented, and the removal of subsequent support can be made.
Supported design advantageously reduces the weight of support construction itself and the consumption of material at porous network structure, and rear
Removal can be easy in treatment process to support and be preferably minimized the surface roughness of supporting surface.Detailed description of the invention
Fig. 1 is general structure schematic diagram outside metal increasing material manufacturing controlled pore support construction of the present invention.
Fig. 2 is metal increasing material manufacturing controlled pore support construction Unit agent structure schematic diagram of the present invention.
Fig. 3 is metal increasing material manufacturing controlled pore support construction array schematic diagram of the present invention.
Fig. 4 is the controlled pore support construction thin bar structural schematic diagram in metal increasing material manufacturing of the present invention.
Fig. 5 is that metal increasing material manufacturing controlled pore support construction supporting point of the present invention determines schematic diagram.
Fig. 6 is controlled pore support construction and molded part schematic diagram in metal increasing material manufacturing of the present invention.
Fig. 7 is controlled pore support construction and molded part front view in metal increasing material manufacturing of the present invention.
Fig. 8 and Fig. 9 is the other two kinds of metals increasing material manufacturing controlled pore support construction schematic diagram of the present invention.
Specific embodiment
Embodiment 1
Referring to figs. 1 to Fig. 9, the production method of the controlled pore reticular supporting structure in metal increasing material manufacturing, the system
It is as follows to make method:
S1, controlled pore reticular supporting structure is designed by UG parametric modeling method: uses the side of UG parametric modeling
The cell cube of method building controllable porous structure；Design the following parameter of initial setting: unit body length, cell cube width, cell cube
Four parameters of height and cell cube holder radius, after setting parameter, constrained in UG modeling using the parameter of setting；
It only needs to modify parameter when subsequent modification and can be achieved with the adjustment of cell cube size, porosity；
S2, the shape for needing to add supporting surface according to part, array goes out controlled pore reticular supporting structure, according to part
Height increases or decreases the number of cell cube；Supporting surface contact portion with molded part is extended from network cells body node
The thin bar gone out.
The point that S3, layout addition support: thin bar is drawn from supporting point, a part of thin bar puts in molded part, protrudes into molding
The length of part determines the bond strength between support and molded part；
S4, after determining the height of supporting point and thin bar, it is to support that each height of the point from substrate, which subtracts bearing height,
Cell cube overall height；The height and number of each cell cube are determined according to overall height；；After determining cell cube number,
Overall height is divided into set number of segment, every section of midpoint is the node of cell cube pole, and cell cube pole is from this node
Place generates；
S5, cell cube 4 include big unit body and junior unit body, and the pole of small octahedral unit is from the pole of big unit body
Midpoint generates, and thin bar is generated from the vertex of big unit body and junior unit body.
The controlled pore support construction in metal increasing material manufacturing made according to production method described above, including top
Be in contact with substrate part 3 with the supporting surface contact portion 1 of molded part, intermediate body portion 2 and lower part；
The intermediate body portion 2 is made of multiple porous element bodies, and the porous element body is big octahedra single
Meta structure, the big octahedral unit structure are spliced to form by eight first poles；
It is in contact with substrate the straight-bar that the node for the porous element body that part 3 is outside extends downwardly；
The described extension upward with the vertex of molded part 5 supporting surface contact portion 1 is the top porous element body
Part, the extension are small octahedral unit structure 11 and the thin bar 6 connecting with molded part；
The small octahedral unit is spliced to form by eight second poles, and described is arranged in second pole
The midpoint of one pole；The length of first pole is the half of the length of the second pole, and described is small octahedra single
The height of meta structure is the half of the height of big octahedral unit structure.
The thin bar 6 is generated from the vertex of big octahedral unit structure and small octahedral unit structure；The thin bar
Top surface diameter 8 be less than basal diameter 7, the upper end of the thin bar 6 is protruded into inside molded part 5.
Further, the X-direction length of the big octahedral unit structure and Y-direction length and pole diameter dimension are adjustable
Section.
Further, the X-direction length of the big octahedral unit structure is 1.4mm~4mm, Y-direction length 1.4mm~
4mm, pole diameter dimension are 1.5mm~3mm.
Further, the height of the porous element body is 2mm~6mm.
Further, the top diameter 8, base diameter 7 of the thin bar and 9 adjustable, top diameter 8 and base diameters of height
7 setting ranges are 0.1mm~0.5mm, and it is 1mm~2mm. that range, which is arranged, in height 9
Further, it is 0.1mm~0.8mm that the thin bar 6, which protrudes into the setting range of the length inside molded part,.
In view of Forming Quality, shaping strength and stability, the internal structure of supportive body, the list of internal structure are devised
First body is designed to octahedral unit body.As shown in Figure 2.By internal structure design at octahedral unit structure, can protect in this way
Demonstrate,prove the strength reduction under the premise of support strength and stability support construction, but can reduce support with powder amount, increase
The ease of removal of support.The size of cell cube is different according to forming part height and changes.As shown in figure 3, unit volume mesh
Size can flexibly change, and cell cube X-direction length, Y-direction length and cell cube pole diameter can be according to required intensity
It is adjusted, increases length, reduces pole size, grid becomes larger, and increases the ease of removal of support, but strength reduction.And it props up
The overall height of support is then adjusted according to the height of molded part, and cell cube number and each cell cube height are then according to branch
Overall height is supportted to determine.
Fig. 4 shows the partial enlarged view of support construction and forming part junction.5 be molded part, and 4 be support construction.6
For thin bar, base diameter 7 and top diameter 8 can be adjusted according to required support strength.It is big to be generally made into base diameter,
Top diameter is small.It is designed to that thin bar further reduces the contact area of single pole and molded part, reduces single pole
Intensity further increases the ease of removal of support.The height 9 of thin bar is also adjustable parameter.The height for changing thin bar is adjustable
The removal difficulty of support can be changed in the bonding strength of support and molded part.Thin bar is high, and intensity is low, it is easier to remove, thin bar is short
It is then opposite.Support some to put in molded part, put in length be 10 shown in, can by adjusting this length come change support with
The bond strength of molded part, prevents molded part from buckling deformation occurs because of internal stress.11 be small octahedral unit structure, effect
It is to increase the thin bar connecting with molded part, thin bar is extended out at the top of junior unit body and big unit body.So with
The thin bar density of molded part connection can adjust by adjusting the number of junior unit body, realize the controllable function of support density
Energy.
Fig. 5 is the top view of molded part supporting surface, according to top view come the position of determination unit body supporting point.12 be molding
The supporting surface of part, 13 points supported for required addition.And the size of unit volume mesh X-direction and Y-direction can be according to required
Intensity is adjusted.
Embodiment 2
Determine method for an example with catenoid, reality according to cell cube described in embodiment 1 and supporting point
Apply 2 structural schematic diagram of example such as Fig. 6.
Molded part 14 has the curved surface of a pendency, and overhang length reaches more than ten millimeters of magnitude, it is necessary to add support
It can guarantee Forming Quality and the dimensional accuracy etc. of draping face.So addition support is necessary.15 parts are exactly to design in such as figure
Controlled pore support construction.The distribution of supporting point is arranged according to method described in embodiment 1.And the height of each cell cube
Degree is determined according to molded part overall height, is illustrated in figure 7 the front view of structural schematic diagram.Support the thin bar connecting with molded part
Highly 16 determine according to required intensity.Being left height 17 just is the height of cell cube support, by height 17 according to individual unit
The height of body is divided into several sections, and three section 18,19,20 are divided into figure.Each cell cube node location draws from the midpoint being segmented
Out, 21 be the cell cube strut drawn.The node location of remaining element body is also obtained with the method.
Fig. 8, Fig. 9 are the controlled pore support construction for being suitble to small area or marginal portion, and cell cube is still by octahedron
Composition, is slightly different with molded part coupling part.
The invention proposes controlled pore support constructions, devise the internal structure and connecting portion structure of support, propose
Using octahedron as the inner porosity of unit and small octahedral top support structure.Branch is adjusted by adjusting each parameter
The intensity and ease of removal of support.And the thin bar supported amount contacted with molded part can be increased and decreased according to demand, be realized
Support density controllable function.And porous element height can neatly be modified with number according to the height of forming surface.It is real
The addition of incumbent outstanding face support of anticipating.In addition the two kinds of support constructions designed are suitable for small area or marginal portion.Controlled pore
Parameters of braced structure is flexible, simplifies support, reduces powder consumption, in turn ensures intensity, and processing flexibly, increases support
Ease of removal.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (7)
1. the network-like support construction of controlled pore in metal increasing material manufacturing, it is characterised in that: including top with molded part
Supporting surface contact portion, intermediate body portion and lower part are in contact with substrate part；
The intermediate body portion is made of multiple porous element bodies, and the porous element body is big octahedral unit knot
Structure, the big octahedral unit structure are spliced to form by eight first poles；
It is in contact with substrate the straight-bar that the node for the porous element body that part is outside extends downwardly；
The described extension upward with the vertex of molded part supporting surface contact portion is the top porous element body, institute
The extension stated is small octahedral unit structure and the thin bar connecting with molded part；
The small octahedral unit is spliced to form by eight second poles, and first bar is arranged in second pole
The midpoint of son；The length of first pole is the half of the length of the second pole, the small octahedral unit knot
The height of structure is the half of the height of big octahedral unit structure；
The thin bar is generated from the vertex of big octahedral unit structure and small octahedral unit structure；The top surface of the thin bar
Diameter is less than basal diameter, and the upper end of the thin bar is protruded into inside molded part.
2. the production method of the controlled pore reticular supporting structure in metal increasing material manufacturing as described in claim 1, including such as
Lower step:
S1, controlled pore reticular supporting structure is designed by UG parametric modeling method: uses the method structure of UG parametric modeling
Build the cell cube of controllable porous structure；Design the following parameter of initial setting: unit body length, cell cube width, cell cube height
Degree and four parameters of cell cube holder radius after setting parameter, are constrained in UG modeling using the parameter of setting；It is subsequent
It only needs to modify parameter when modification and can be achieved with the adjustment of cell cube size, porosity；
S2, the shape for needing to add supporting surface according to part, array goes out controlled pore reticular supporting structure, according to the height of part
Increase or decrease the number of cell cube；Supporting surface contact portion with molded part is extended out from network cells body node
Thin bar；
The point that S3, layout addition support: thin bar is drawn from supporting point, a part of thin bar puts in molded part, protrudes into molded part
Length determines the bond strength between support and molded part；
S4, after determining the height of supporting point and thin bar, it is support unit that each height of the point from substrate, which subtracts bearing height,
Body overall height；The height and number of each cell cube are determined according to overall height；It, will be overall after determining cell cube number
Height is divided into set number of segment, and every section of midpoint is the node of cell cube pole, and cell cube pole generates from this node；
S5, cell cube include big unit body and junior unit body, and the pole of small octahedral unit is from the midpoint of the pole of big unit body
Position generates, and thin bar is generated from the vertex of big unit body and junior unit body.
3. the controlled pore network support structure in metal increasing material manufacturing as described in claim 1, it is characterised in that: described
The X-direction length and Y-direction length and pole diameter dimension of big octahedral unit structure are adjustable.
4. the controlled pore network support structure in metal increasing material manufacturing as claimed in claim 3, it is characterised in that: described
The X-direction length of big octahedral unit structure is 1.4mm~4mm, Y-direction length 1.4mm~4mm, and pole diameter dimension is
1.5mm~3mm.
5. the controlled pore network support structure in metal increasing material manufacturing as claimed in claim 4, it is characterised in that: described
The height of porous element body is 2mm~6mm.
6. the controlled pore network support structure in metal increasing material manufacturing as claimed in claim 5, it is characterised in that: described
The top diameter of thin bar, base diameter and height are adjustable, and top diameter and base diameter setting range are 0.1mm~0.5mm, high
Degree setting range is 1mm~2mm.
7. the controlled pore network support structure in metal increasing material manufacturing as claimed in claim 6, it is characterised in that: described
The setting range that thin bar protrudes into the length inside molded part is 0.1mm~0.8mm.
Priority Applications (1)
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