CN109318506A - A kind of composite material grid lattice structure and preparation method - Google Patents
A kind of composite material grid lattice structure and preparation method Download PDFInfo
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- CN109318506A CN109318506A CN201810855315.2A CN201810855315A CN109318506A CN 109318506 A CN109318506 A CN 109318506A CN 201810855315 A CN201810855315 A CN 201810855315A CN 109318506 A CN109318506 A CN 109318506A
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000006260 foam Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims description 77
- 238000000034 method Methods 0.000 claims description 33
- 238000000465 moulding Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 31
- 238000010586 diagram Methods 0.000 description 21
- 239000011159 matrix material Substances 0.000 description 15
- 238000005520 cutting process Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 6
- 238000005491 wire drawing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229910000743 fusible alloy Inorganic materials 0.000 description 3
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- 238000007789 sealing Methods 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012966 insertion method Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention belongs to field of compound material, a kind of netted lattice structure of composite material and preparation method, including transverse truss, longitudiual truss and covering are disclosed；Longitudiual truss is interspersed in the inside of transverse truss, and transverse truss is inserted in the groove of longitudiual truss, the outside of covering bonding and transverse truss and longitudiual truss.Transverse truss, including horizontal top boom, horizontal lower boom, horizontal web member；Horizontal top boom and horizontal lower boom are parallel to each other, and horizontal web member is connected between horizontal top boom and horizontal lower boom, and horizontal web member and horizontal top boom and horizontal lower boom constitute triangle.Longitudiual truss, including vertical top boom, vertical lower boom, vertical web member, groove and foam；At the node that the vertical web member that groove is located at the outside of longitudiual truss is connect with vertical top boom and vertical lower boom and the midpoint of two nodes.High production efficiency of the present invention, maintainable good, node strength is high, and connectivity is strong.
Description
Technical field
The invention belongs to field of compound material more particularly to a kind of netted lattice structures of composite material and preparation method.
Background technique
Lattice structure is made of two pieces of panels and intermediate dot matrix fuse, and dot matrix fuse therein is by being in periodic arrangement
Rod piece composition.The forms such as pyramid, tetrahedron, Kagome can be divided into according to the arrangement mode of dot matrix fuse rod piece.By material
Material can be divided into metal, composite material and plastics etc..Metal lattice structure usually in a welding manner connects fuse and panel
It is connected together.And composite material dot matrix structure can only pass through cementing, mechanical company since the special property of composite material can not weld
Connect, fiber embedment etc. modes connect.
There are several types of preparation methods at present for composite material dot matrix structure: (1) wire drawing connection method, and panel has opened up compression bar slot
And wire drawing hole, first compression bar is inserted into compression bar slot, the wire drawing of pre-soaked resin is then woven through panel from wire drawing hole, it will be opposite
Upper and lower two panels pull fix；(2) laminate is cut corrugated length by Water Cutting technique by Water Cutting construction from part
Item processes embeding locking gate port at node, is prepared into pyramid dot matrix fuse together by right-angled intersection mode interlocking, last and face
Plate bonds together；(3) embeding locking gate port assembling method cuts out embeding locking gate port, then the dot matrix core that will be cut into Water Cutting on panel
Rod piece is inserted into panel embeding locking gate port and spreading glue；(4) corrugated plating cuts dot matrix core and is reinforced at node with sheet metal, first
Composite material corrugated plate is prepared, fold-line-shaped rod piece is then cut into, is then bonded together with sheet metal assembly, finally will
Sheet metal is Nian Jie with panel；(5) pultrusion rod assembling method punches on panel, is inserted into the cylindrical bar of pultrusion preparation simultaneously
Redundance is cut off after node smearing structure glue, curing molding；(6) thermoplastic fusion bonding method presoaks thermoplastic filaments band
Material is woven into reticulated, and then local heating punching press obtains lattice structure core material, finally by core material and two pieces of thermoplastic composites
It is bonded after material panel heating；(7) mould heat pressure secondary forming process prepares Unidirectional Fiber-reinforced Composite gold by mold
Word tower dot matrix fuse, then bonds together with panel；(8) mould heat pressure one-shot forming technique, using demountable core model,
Prepreg is laid in core model groove, both ends fiber is embedded in panel；(9) fiber interts low-melting alloy core die resin note
Enter method, by do not infiltrate resin fiber intert forward (FWD) hole low-melting alloy core die in and lay panel fiber, then use
VARI technique injects resin, heating fusing low-melting alloy core die after solidification.
Above-mentioned composite material dot matrix structure preparation method has the following problems: method (1) wire drawing can only tension cannot be pressurized,
Lack die pressure, unstable quality when wire-drawing shape simultaneously；It is secondary bonding between the core of method (2) face, in weld section
Point is easily destroyed, and furthermore laminate machine direction can not be designed, and rod piece transverse fiber content is big；Method (3) to (7) is
The secondary bonding of face core, node abutting edge intensity are low；Method (8) mold is complicated, and demoulding is difficult, it is difficult to be applied to Practical Project；Side
Method (9) fuse and panel are integrally formed, and structural mechanical property is good, impure in release problems, and it is special-shaped curved can to prepare ultra-large type
Component, but preparation process is complicated, high production cost.
Although above-mentioned lattice structure preparation method is different, structure type is identical, it may be assumed that passes through intermediate dot matrix core
Son links together two pieces of panels, is point contact between fuse and panel.Under classical three-point bending stress, knot
Dot matrix fuse in structure is primarily subjected to shear and panel is kept to stablize simultaneously, and panel is primarily subjected to moment of flexure.Dot matrix fuse needs
By a point by Shear transfer to panel, this, which will lead to, will appear serious stress concentration on panel.Opposite dash-board injury simultaneously
Very sensitive, the destruction of any one piece of panel will all make the reduction of lattice structure bearing capacity.Two pieces of panels are indispensable, therefore dot matrix
The inside of structure is difficult to carry out later maintenance.How connection and panel stress node at fuse and panel between is promoted
Concentration is the main problem that lattice structure is faced.
Summary of the invention
It is an object of the invention to open stress distribution is uniform, a kind of netted dot matrix knot of the high composite material of node strength
Structure and preparation method.
The object of the present invention is achieved like this:
A kind of netted lattice structure of composite material, including transverse truss 1, longitudiual truss 2 and covering 3；Longitudiual truss 2 is worn
Be inserted in the inside of transverse truss 1, transverse truss 1 is inserted in the groove 7 of longitudiual truss 2, covering 3 bonding with transverse truss 1 and indulge
To the outside of truss 2.
Transverse truss 1, including horizontal top boom 41, horizontal lower boom 51, horizontal web member 61；51 phase of horizontal top boom 41 and horizontal lower boom
Mutually parallel, horizontal web member 61 is connected between horizontal top boom 41 and horizontal lower boom 51, horizontal web member 61 and horizontal top boom 41 and horizontal lower edge
Bar 51 constitutes triangle.
Longitudiual truss 2, including vertical top boom 42, vertical lower boom 52, vertical web member 62, groove 7 and foam 22；Vertical top boom 42
Be parallel to each other with vertical lower boom 52, vertical web member 62 is connected between vertical top boom 42 and vertical lower boom 52, indulge web member 62 with it is vertical on
Chord member 42 and vertical lower boom 52 constitute triangle；Groove 7 be located at the outside of longitudiual truss 2 vertical web member 62 and vertical top boom 42 and
At the node that vertical lower boom 52 connects and the midpoint of two nodes；The width of groove 7 is identical as the thickness of transverse truss 1, section
At the node that the depth of groove 7 at point is connect with the horizontal web member 61 of transverse truss 1 with horizontal top boom 41 and horizontal lower boom 51
Depth of section is identical, the depth of the groove 7 of the midpoint of two nodes and the horizontal top boom 41 of transverse truss 1 and horizontal lower boom 51
Depth of section is identical；Foam 22 is covered on the vertical top boom 42 of longitudiual truss 2 and the outside of vertical lower boom 52.
A kind of netted lattice structure preparation method of composite material, it is characterised in that: comprise the following steps:
Step 1: prepare mold, core model 8 is fixed on pedestal 15；
Step 2: winding interspersed truss member fiber, and the ladder fibre 10, second of triangular fibre 9, first is trapezoidal
Fiber 11, the winding of third root ladder fibre 12 are punctured on core model 8, and are pressed into bottom, and three kinds of ladder fibres are continuous with one
Ladder fibre 13 be laid with；
Step 3: being laid with surface fibre 14 and foam 22, and foam 22 is only layed in longitudiual truss profile 19 according to actually making
It chooses whether to be laid with situation；
Step 4: mounting end sealing element 16 and L shape mold 17 mold, and are pressurizeed using mechanical pressurization or vacuum bag；
Step 5: curing molding is solidified if using prepreg using heated at constant temperature case or autoclave, such as
Fruit uses the fiber for not infiltrating resin then to be prepared using RTM or VARTM or VARI technique；
Step 6: mold is removed, prepares transverse truss profile 18 and longitudiual truss profile 19 respectively according to above step；
Step 7: groove 7 is opened up on 19 surface of longitudiual truss profile using milling machine；
Step 8: transverse truss profile 18 and the slice of longitudiual truss profile 19 are obtained into transverse truss 1 and longitudiual truss 2；
Step 9: longitudiual truss 2 is tilted and is inserted into the staggered transverse truss 1 of left and right horizontal, is carried out before insertion
Blasting treatment and smearing structure glue；
Step 10: the transverse truss 1 of dislocation is aligned, and inclined longitudiual truss 2 is vertical, transverse truss 1 is inserted into vertical
Into the groove 7 of truss 2, the netted lattice structure of composite material is obtained；
Step 11: bonding covering 3.
The invention has the benefit that
High production efficiency of the present invention is suitble to industrialized mass production；Reasonable stress, internal truss frame are main load-carrying member,
Panel；It is maintainable good, it is small on structure stress influence to remove panel；Rod piece fiber is completely through node, and fiber is continuous at node,
Node strength is high；Connectivity is strong, and the company of truss member need to be only considered when being connected with the netted lattice structure of other planes
It connects.
Detailed description of the invention
Fig. 1 is a kind of netted lattice structure schematic diagram of composite material；
Fig. 2 is transverse truss and longitudiual truss connection schematic diagram；
Fig. 3 is the netted lattice structure monomer of composite material；
Fig. 4 is transverse truss plan view；
Fig. 5 is longitudiual truss plan view；
Fig. 6 is the longitudiual truss plan view with foam；
Fig. 7 is to prepare mold；
Fig. 8, which is that fiber winding is interspersed, is laid with schematic diagram；
Fig. 9 is that truss-triangles fiber interts schematic diagram；
Figure 10 is that first truss ladder fibre interts schematic diagram；
Figure 11 is that second truss ladder fibre interts schematic diagram；
Figure 12 is that third root truss ladder fibre interts schematic diagram；
Figure 13, which is that all truss fibers are interspersed, is laid with schematic diagram；
Figure 14 is continuously to intert ladder fibre schematic diagram；
Figure 15 is molding explosive view；
Figure 16 is molding figure；
Figure 17 is longitudiual truss profile fluting schematic diagram；
Figure 18 is longitudiual truss section steel cutting schematic diagram；
Figure 19 is transverse truss section steel cutting schematic diagram；
Figure 20 is longitudiual truss direction of insertion schematic diagram；
Figure 21 is that longitudiual truss is inserted into schematic diagram；
Figure 22 is the first assembling schematic diagram；
Figure 23 is the second assembling schematic diagram；
Figure 24 is third assembling schematic diagram；
Figure 25 is the 4th assembling schematic diagram；
Figure 26 is the 5th assembling schematic diagram；
Figure 27 is the 6th assembling schematic diagram.
Specific embodiment
Further describe the present invention with reference to the accompanying drawing:
Such as Fig. 1, a kind of netted lattice structure of composite material, including transverse truss 1, longitudiual truss 2 and covering 3；Such as Fig. 2
And Fig. 3, longitudiual truss 2 are interspersed in the inside of transverse truss 1, transverse truss 1 is inserted in the groove 7 of longitudiual truss 2, and covering 3 is viscous
The outside of knot and transverse truss 1 and longitudiual truss 2.
Such as Fig. 4, transverse truss 1, including horizontal top boom 41, horizontal lower boom 51, horizontal web member 61；Horizontal top boom 41 and horizontal lower edge
Bar 51 is parallel to each other, and horizontal web member 61 is connected between horizontal top boom 41 and horizontal lower boom 51, horizontal web member 61 and horizontal top boom 41 and
Horizontal lower boom 51 constitutes triangle.
Such as Fig. 5, longitudiual truss 2, including vertical top boom 42, vertical lower boom 52, vertical web member 62, groove 7 and foam 22；On vertical
Chord member 42 and vertical lower boom 52 are parallel to each other, and vertical web member 62 is connected between vertical top boom 42 and vertical lower boom 52, indulge web member 62
Triangle is constituted with vertical top boom 42 and vertical lower boom 52；The vertical web member 62 that groove 7 is located at the outside of longitudiual truss 2 winds up with vertical
At the node that bar 42 and vertical lower boom 52 connect and the midpoint of two nodes；The thickness phase of the width of groove 7 and transverse truss 1
Together, the node that the depth of the groove 7 at node is connect with the horizontal web member 61 of transverse truss 1 with horizontal top boom 41 and horizontal lower boom 51
The depth of section at place is identical, the depth of the groove 7 of the midpoint of two nodes and the horizontal top boom 41 of transverse truss 1 and horizontal lower boom
51 depth of section is identical；Such as Fig. 6, foam 22 is covered on the vertical top boom 42 of longitudiual truss 2 and the outside of vertical lower boom 52.
A kind of netted lattice structure preparation method of composite material, it is characterised in that: comprise the following steps:
Step (1): such as Fig. 7, prepare mold, core model 8 is fixed on pedestal 15；
Step (2): such as Fig. 8 to Figure 13, interspersed truss member fiber is wound, by 9, first ladder fibres of triangular fibre
10, second ladder fibre 11, the winding of third root ladder fibre 12 are punctured on core model 8, and are pressed into bottom, such as Figure 14, and three
Kind ladder fibre is laid with a continuous ladder fibre 13；
Step (3): being laid with surface fibre 14 and foam 22, and foam 22 is only layed in longitudiual truss profile 19 according to actually making
It chooses whether to be laid with situation；
Step (4): if Figure 15 and Figure 16 mounting end sealing element 16 and L shape mold 17 mold, using mechanical pressurization or very
Empty bag pressurization；
Step (5): curing molding is solidified if using prepreg using heated at constant temperature case or autoclave,
It is prepared if using the fiber for not infiltrating resin using RTM or VARTM or VARI technique；
Step (6): mold is removed, prepares transverse truss profile 18 and longitudiual truss profile 19 respectively according to above step；
Step (7): such as Figure 17, groove 7 is opened up on 19 surface of longitudiual truss profile using milling machine；
Step (8): such as Figure 18 and Figure 19, transverse truss profile 18 and the slice of longitudiual truss profile 19 are obtained into transverse truss
1 and longitudiual truss 2, it also pultrusion processes, plate patterning method, 3D printing method can be used prepare transverse truss (1) and longitudinal
Truss (2).
Step (9): such as Figure 20, Figure 21 and Figure 22, longitudiual truss 2 is tilted and is inserted into the staggered lateral purlin of left and right horizontal
In frame 1, blasting treatment and smearing structure glue are carried out before insertion；
Step (10): such as Figure 22 to Figure 27, the transverse truss 1 of dislocation being aligned, and inclined longitudiual truss 2 is vertical, will
Transverse truss 1 is inserted into the groove 7 of longitudiual truss 2, obtains the netted lattice structure of composite material；
Step (11): bonding covering 3.
Embodiment 1 is given below: fiber winds Insertion method:
If making transverse truss as shown in Figure 4, truss length 240mm is made of, each unit 4 basic unit bodies
Body length 60mm, 45 ° of web member angle, web member section 2mm*2mm, chord member upper and lower surface spacing 32mm, chord member section 2mm*3mm.
Longitudiual truss 2 is made of as shown in figure 5, its truss length 240mm 4 basic unit bodies, each unit body length
60mm, 36.25 ° of web member angle, web member section 2mm*2mm, chord member upper and lower surface spacing 32mm, chord member section 2mm*6mm, node
Locate groove 2.1mm*3.5mm, chord member central slot 2.1mm*3.1mm.
Step (1): mold prepares.It is illustrated in figure 7 truss profile and prepares mold, mold includes a pedestal 15 and nine
Core model 8, core model 8 are fixed on pedestal 15 using bolt or other modes, and there are the gaps of 2mm between core model 8.The wheel of core model 8
Exterior feature is triangle, needs to require to design corresponding chamfering according to node fiber lap and demoulding in the corner of triangle.In order to
Conveniently stripped, core model 8 is designed as removably, and furthermore 8 surface of core model can prepare teflon coatings, and successively package air-permeable layer and
Heat-shrink tube.Transverse truss and longitudiual truss need to use various sizes of core model 8 according to design, the preparation principle phase of both they
Together, only laying and size are different.
Step (2): interspersed truss member fiber is wound.As shown in figure 8, fiber is wrapped in from 8 upper opening of core model
On core model 8, and prolong the bottom that the fiber of winding is pressed into core model 8 by graphic arrow direction.It needs to wind triangle on core model 8
The ladder fibre 10, second of fiber 9, first ladder fibre 11, third root ladder fibre 12, altogether 4 kinds of fibers.Such as Fig. 9 institute
The winding for being shown as triangular fibre 9 interts track, and triangular fibre 9 is wound along the numerical order in diagram circle and wears
It inserts, track is in periodic triangle.As Figure 10 to Figure 12 be respectively first ladder fibre, 10, second ladder fibres 11,
The winding of third root ladder fibre 12 interts track, and track is in periodically trapezoidal.Figure 13 is the institute in addition to triangular fibre 9
There is the layout drawing of fiber.3 kinds of ladder fibres, which can only use a continuous ladder fibre 13 and prolong path shown in Figure 14, to be twined
Around.The laying ratio of triangular fibre 9 and ladder fibre 13 is laid with according to calculating.Tow as small as possible when being laid with fiber,
It repeatedly counts, be equably laid with, avoid the fiber of a large amount of same paths of once-paving.Fibre bundle can be prepreg can be with
It is the fiber of non-impregnation.
Step (3): surface fibre 14 or foam 22 are laid with.As shown in Fig. 8,13 and 14, it is laid with triangular fibre 9 and ladder
After shape fiber 13, surface fibre 14 is wound in outer layer.A certain amount of 90 degree of fibers can be added in surface fibre 14, to increase bar
Part transverse strength.In addition to being directly all laid with the outer longitudiual truss 2 of surface fibres 14 it is also an option that laying foam 22 replaces portion
Divide surface fibre 14.As shown in figure 5, longitudiual truss 2 disconnects at node due to being provided with groove 7, fiber, the intensity at node
There is weakening, therefore can be according to as shown in fig. 6, part surface fibre 14 is replaced with foam 22.It can be not by this method
Mitigate construction weight while reducing truss intensity.The surface fibre 14 of 2mm thickness is replaced with into foam 22 as shown in Figure 6, it can be with
Enable 2 weight saving 26.2% of longitudiual truss, whole loss of weight 17.4%.
Step (4): molding.As shown in Figure 15 and Figure 16, then mounting end sealing element 16 first installs L shape mold 17.
Mechanical pressurization or vacuum bag pressurization can be used.
Step (5): curing molding.If using prepreg, solidified using heated at constant temperature case or autoclave
Molding.It is then formed using RTM or VARTM or VARI technique if it is the fiber of non-impregnation.
Step (6): demoulding.Outermost layer L shape mold is removed first, then releases the connection between core model 8 and pedestal 15,
Remove pedestal 15.It finally extracts core model 8 and removes end seal 16.If having wrapped up air-permeable layer and heat-shrink tube outside core model 8,
Air then can be first injected into air-permeable layer, then extract core model 8.
Step (7): 19 surface of longitudiual truss profile fluting.Transverse truss profile 18 does not need to be surface-treated, and longitudinal purlin
Frame section 19 needs to open up groove 7 on surface using milling machine.As shown in figure 17, milling cutter 20 mills on the surface of longitudiual truss profile 19
Cut out rectangular recess 7.The width and depth of groove 7 are determined according to the node section of transverse truss 1 and chord member section, in order to protect
Smoothly assembly needs to design fabrication tolerance to card, and groove depth and width are increased 0.1mm here.
Step (8): profile slice.Use cutting sheet 21 by transverse truss profile 18 and longitudinal purlin as shown in Figure 18 and Figure 19
Frame section 19 is cut into the sheet material of 2mm thickness, obtains transverse truss 1 and longitudiual truss 2.
Step (9): insertion longitudiual truss 2.As shown in figure 20, by transverse truss 1 according to odd even difference turned upside down, and
Left and right directions is staggered 22.4mm i.e. 0.37 cycle length, and front and back constant spacing 30mm i.e. 0.5 cycle length is arranged.And it is longitudinal
Truss 2 turns upside down and the 45 degree of angles that tilt perpendicular to transverse truss 1 according to odd even difference, bottom spacing 5.9mm i.e. 0.1
Cycle length.Longitudiual truss 2 is prolonged Figure 20 to show in shown arrow direction insertion transverse truss 1, after insertion as shown in figure 21.Such as figure
It shown in 22, for the front view of the process, is checked along 2 direction of longitudiual truss, it can be seen that in geometrically transverse truss 1 and indulge
To truss 2, there is no interference.Blasting treatment is carried out to groove 7 and panel point before insertion, and in the recessed of longitudiual truss 2
Smearing structure glue at slot 7 and corresponding node.
Step (10): assembly truss.As shown in figure 23, the lower edge groove 7 of longitudiual truss is inserted into the lower edge of transverse truss 1
Then staggered transverse truss 1 is gradually moved to flush position as shown in Figure 23 to 27, in this process longitudiual truss 2 by bar 5
With the mobile angle changing of transverse truss 1.Last transverse truss 1 or so is aligned as shown in figure 27, and longitudiual truss is stood vertically
It is vertical.Truss-like lattice structure finished product as shown in Figure 1 is obtained after structure adhesive curing.
Step (11): bonding covering.In the top-bottom chord surface smearing structure glue of truss-like lattice structure, then by covering
3 paste surface, obtain the netted lattice structure of the composite material with covering as shown in Figure 2.
Embodiment 2: pultrusion processes:
The step (1) in embodiment 1 to step (7) are replaced to carry out transverse truss profile 18 and longitudinal direction using pultrusion processes
The preparation of truss profile 19.Subsequent installation step is same as Example 1.
Embodiment 3: plate patterning method:
The step (1) in embodiment 1 to step (8) are replaced to carry out transverse truss 1 and longitudiual truss 2 using plate patterning method
Preparation.The composite material laminated board of 2mm thickness or metal plate are directly cut using Water Cutting or laser cutting or machine cuts
At transverse truss 1 and longitudiual truss 2 as shown in Figure 4 and Figure 5.Subsequent installation step is same as Example 1.
Embodiment 4:3D impact system:
The step (1) in embodiment 1 to step (8) are replaced to carry out 1 He of transverse truss using composite material 3D printing technique
The preparation of longitudiual truss 2.It is printed using composite material 3D printing technique fiber path shown in Figure 14.Use this method
The netted lattice structure of high-performance composite materials can expeditiously be produced.And stock utilization is high, can effectively save material.
Subsequent installation step is same as Example 1.
Compared with prior art, high production efficiency of the present invention is suitble to industrialized mass production；Reasonable stress, internal truss frame
For main load-carrying member, panel；It is maintainable good, it is small on structure stress influence to remove panel；Rod piece fiber completely through node,
Fiber is continuous at node, and node strength is high；Connectivity is strong, need to only examine when being connected with the netted lattice structure of other planes
Consider the connection of truss member.
The above is not intended to restrict the invention, and for those skilled in the art, the present invention can have various
Change and variation.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (5)
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| CN110500348A (en) * | 2019-08-14 | 2019-11-26 | 上海卫星工程研究所 | 3D printing multiple-pass joint |
| CN111016215A (en) * | 2019-12-31 | 2020-04-17 | 哈尔滨工业大学 | Combined die for preparing fiber reinforced composite material folded sandwich circular truncated cone shell |
| CN111605129A (en) * | 2019-02-25 | 2020-09-01 | 三菱重工业株式会社 | Joining member and method for manufacturing joining member |
| CN112396937A (en) * | 2020-06-18 | 2021-02-23 | 哈尔滨工业大学（威海） | Building block type truss teaching experiment device |
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| CN101708637A (en) * | 2009-11-30 | 2010-05-19 | 哈尔滨工业大学 | Assembly jig for preparing fiber reinforced eggshell type dot matrix sandwich panel core |
| CN105346070A (en) * | 2015-09-30 | 2016-02-24 | 北京大学 | Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure |
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| CN101708637A (en) * | 2009-11-30 | 2010-05-19 | 哈尔滨工业大学 | Assembly jig for preparing fiber reinforced eggshell type dot matrix sandwich panel core |
| CN105346070A (en) * | 2015-09-30 | 2016-02-24 | 北京大学 | Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111605129A (en) * | 2019-02-25 | 2020-09-01 | 三菱重工业株式会社 | Joining member and method for manufacturing joining member |
| CN111605129B (en) * | 2019-02-25 | 2022-05-10 | 三菱重工业株式会社 | Joint member and method for manufacturing joint member |
| CN110500348A (en) * | 2019-08-14 | 2019-11-26 | 上海卫星工程研究所 | 3D printing multiple-pass joint |
| CN111016215A (en) * | 2019-12-31 | 2020-04-17 | 哈尔滨工业大学 | Combined die for preparing fiber reinforced composite material folded sandwich circular truncated cone shell |
| CN112396937A (en) * | 2020-06-18 | 2021-02-23 | 哈尔滨工业大学（威海） | Building block type truss teaching experiment device |
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