CN100350088C - Three-dimensional integral weaving method for multi-directional preform - Google Patents
Three-dimensional integral weaving method for multi-directional preform Download PDFInfo
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- CN100350088C CN100350088C CNB200610013429XA CN200610013429A CN100350088C CN 100350088 C CN100350088 C CN 100350088C CN B200610013429X A CNB200610013429X A CN B200610013429XA CN 200610013429 A CN200610013429 A CN 200610013429A CN 100350088 C CN100350088 C CN 100350088C
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Abstract
The invention relates a tridimensional integral knitting method for a multidirectional preforming component, which based on a technology of a four step method three dimensional four way, or five way or above square and/ or circular knitting, the present invention is characterized in that when a first forming direction part of the multidirectional preforming component is knitted, all yarn of a second or rest forming direction part of the component is reserved at a vertically intersected position of two or more geometric solid spaces by adopting a yarn adding and leading method according to the shape of the following geometric solids and the requirement of a knitting rule, and then the knitting of the first forming direction part is continued till completed; the knitting direction is changed, the reserved yarn is led out from the second or the rest other forming direction, the knitting rule of a machine is adjusted accordingly, and the second or the rest forming direction part is knitted till the component is completed entirely. The invention has the advantages that the method is simple, the application is wide, and the integrity of the structure and the mechanical performance of the component are improved.
Description
Technical field
The present invention relates to a kind of 3 D weaving technology, a kind of 3 D weaving technology that is used for the composite material supporter preform, be specially a kind of three-dimension integrally braiding method and auxiliary mould thereof of making the multi-directional preform of the crossing complicated shape composite material supporter of two or more solid spatial vertical, international monopoly Main classification number plan is Int.Cl
7D04C 1/00.
Background technology
The enhancing structure of composite or the shape and structure of supporter preform and quality thereof have determined performance of composites substantially.The important form that the high-performance advanced composite material strengthens structure is to adopt the 3 D weaving preform of 3 D weaving technology preparation.Its main feature is: 1. fibre bundle in product, be interweaved, multi-direction orientation, thereby form the structure of an integral body, make product in all directions, particularly on thickness direction, be enhanced, avoided layering.2. can directly knit out three-dimension integrally special-shaped product, for example three-dimension integrally thick-walled tube, annulus, tapered sleeve body, worker's type beam, T type beam, L type beam, the box type beam etc. of different shape, different size.Need not reprocess the fibre damage of having avoided processing to cause with its composite product of making.3. can use various high-performance fibers, weave as carbon fiber, silicon carbide fibre, quartz fibre, aramid fiber, glass fibre and general fibre etc.Therefore, the 3 D weaving technology is developed in recent years rapidly, and becomes one of crucial technologies of preparing of composite element that high-tech sector is used such as Aeronautics and Astronautics, has good development prospect.
At present the 3 D weaving technology is based on four step rule 3 D weaving technology, and it comes from the four step rule three dimensional knitting method that Luo Ting (R.A.Florentine) not describes in its patent (US 4312261).Li Wei (W.Li) etc. are also at its " structural analysis I of D braided composites preform: the preformed braided technology of four step rule " (textile research, 1990.4.81 page or leaf Structural Analysis of 3-D BraidedPreforms for Composites Part I:The Four-step Preforms, J.Text.Inst., 1990,81 NO.4) square and round four step rule 3 D weaving technology have been described by system in, and have analyzed the characteristics of motion of braiding yarn in the braiding process.This technology can comprise two yarn systems, i.e. knitting yarn wire system and axle yarn system (the 5th to yarn system).Wherein the knitting yarn wire system is the main yarn system, and axle yarn system is the auxiliary yarns wire system that adds as required.All yarns hang along the weaving forming direction and are arranged on the braiding machine chassis.The spread pattern of braiding yarn and type of weave are determined by the shape of cross section of product: 1. the product cross section is rectangle or rectangle combination, for example T type, worker's type, L type, box type etc., the braiding yarn is arranged in the cross sectional shape of product by the row and column mode, and this braid method is the square braiding; 2. the cross section of product is circle or annular, and braiding yarn mode then capable by hoop and radial alignment is arranged in the cross sectional shape of product, and this braid method is called tubular braiding.In the braiding process, machine is pressed the motion of ranks over-over mode, four steps were a machine cycles, knitting yarn is by certain design rule motion, the axle yarn is motionless along weaving direction, form a not stratified three-dimensional four-way (not containing a yarn) or three-dimensional five like this to (containing a yarn) overall structure,, just can be made into the prismatic 3 D weaving preformed member of certain-length through some machine cycles.Zhongcai Sci. ﹠ Tech. Co., Ltd has reported that in its patent " composite with 3 D multi-directional braided fabric dead size reduced profile yarn weaving method " (CN 1614114) a kind of composite is with 3 D multi-directional braided fabric dead size reduced profile yarn weaving method.Its principle is to utilize the characteristics of 3 D weaving spindle (moving yarn and motionless yarn) motion, knitting yarn is constantly reduced or subtracts carefully, thereby realize reducing of braided fabric cross-sectional area.This method can realize the braiding of the three-dimensional braiding preforms that cross-sectional area gradually changes, but integral piece has only a forming direction.Reduce or subtract in the thin process at yarn, the characteristics of motion that machine chassis is taken the yarn device can not change, and for example, initial cross-section is the preform of rectangle, and its yarn movement is pressed the lateral rows and the longitudinal row motion of the square braiding characteristics of motion.After reducing or subtract carefully through yarn, leftover yarn is still followed the characteristics of motion of square braiding lateral rows and longitudinal row; Again for example, initial cross-section is the product of rectangle and circular combination, the machine chassis characteristics of motion is the combination of square and tubular braiding rule, even a part in the braiding process wherein (circle or rectangle) is cut, the characteristics of motion of other parts can not change yet, and its product forming direction also has only one; Again for example, turning, square-section product is made by changing weaving direction in the braiding process, but the machine movement rule can not change, and this method only limits to the square braiding of low flat plates.
But in engineering is used, most composite product shape and structure more complicated, for example, multidirectional moulding prefabricated by the crossing complicated shape composite material supporter that constitutes of two or more solid spatial vertical has two or more forming directions, perhaps in a product, relate to square braiding and two kinds of characteristics of motion of tubular braiding simultaneously, for example dull and stereotyped joint product, two forming directions (shown in Fig. 1 arrow) are just arranged, one is to adopt the square braiding along panel axes to, yarn arrays and braiding pattern; Another is axial along pipe, and yarn arrays and braiding pattern adopt tubular braiding; Again for example, the T junction product also has 2 forming directions (shown in Fig. 2 arrow), one along main panel axes to, another is along perpendicular to main dull and stereotyped direction; Again for example, box body joint (referring to shown in Figure 3), it has 5 forming directions, and the square combined knitting that forming direction is a main cartridge is axial, and four pipes vertically stretching are respectively the forming direction of other 4 tubular braidings.For this class the composite product of two or more weaving forming directions is arranged, adopt existing four step rule three dimensional knitting method or technology just can't finish, can not satisfy the requirement of high-performance composite materials preformed member.Present solution is to adopt 3 D weaving technology to weave each part of product respectively, adopts the technology of stitching or co-curing that they are linked together then.Such preform globality is very poor, connecting portion only have sew up fiber or matrix stressed, it is concentrated and destroyed to be easy to form stress during bearing load.
Summary of the invention
At the deficiencies in the prior art, the technical problem that quasi-solution of the present invention is determined is, design a kind of three-dimension integrally braiding method of multi-directional preform, this method can realize that two or more solid spatial vertical intersect the three-dimension integrally braiding of the multi-directional preform of the complicated shape composite material supporter that constitutes, make the inner reinforcing fiber bundles of product can be according among the part of design rule along different spatial orientations through different forming directions, and form a continuous not stratified three-dimension integrally network structure, improve the globality of product structure, improve the mechanical mechanics property of solid space connecting portion, and product is for body formed only, need not reprocessing after making composite, while method is simple, and applicability is wide.
The technical scheme that the present invention solves described braid method technical problem is: the three-dimension integrally braiding method that designs a kind of multi-directional preform, this braid method is with the three-dimensional four-way of four step rule, five to or five to above square or/and tubular braiding technology be the basis, it is characterized in that in first forming direction part of braiding multi-directional preform, in the position that two or more solid spatial vertical intersect, after adopting ledger line lead-in wire method to reserve remaining other forming direction of second or institute whole yarns partly of multi-directional preform by the geometry shape of follow-up forming direction and braiding pattern requirement, continue the first forming direction part of braiding multi-directional preform again, until finishing; Change weaving direction then, second or remaining other forming direction of institute draw described reservation yarn, and the braiding pattern of corresponding adjustment machine, remaining other forming direction part of second or institute of braiding multi-directional preform is finished until the whole braidings of multi-directional preform.
Compared with prior art, the present invention is in the three-dimensional four-way of basic four step rule, five to or five on the basis of above weaving, the braid method that adds yarn and lead-in wire by ingenious design in advance, realized having the integral weaving of the preform of two or more weaving forming directions, be applicable to the three-dimension integrally braiding requirement of the multi-directional preform of the various labyrinth shape composite material supporters that two or more solid spatial vertical intersect, can knit out the multi-directional preform of the composite material supporter of various labyrinth shapes, and yarn runs through into an integral body mutually according to design rule in different forming direction preforms, can guarantee fortifying fibre in the whole preform continuously and complete.Simultaneously, preform is realized according to the product size design fully, avoid or reduced the fibre damage that machining causes behind the preformed member composite curing, greatly improve the globality and the combination property of composite, especially the bonding strength between the different forming directions, and have characteristics such as braid method is simple, wide adaptability.
Description of drawings
Fig. 1 is for adopting a kind of embodiment of three-dimension integrally braiding method braiding gained product of the present invention---have the flat board of two forming directions and the face shaping schematic diagram of vertical tube joint product;
Fig. 2 is for adopting the another kind of embodiment of three-dimension integrally braiding method braiding gained product of the present invention---have the face shaping schematic diagram of the T junction product of two forming directions;
Fig. 3 is for adopting the third embodiment of three-dimension integrally braiding method braiding gained product of the present invention---have four pipes of five forming directions and the face shaping schematic diagram of a vertical joint product that links to each other of box body;
Fig. 4 partly reserves the theoretical network for location of yarn for the dull and stereotyped pipe with vertical tube joint product of two forming directions of first embodiment of three-dimension integrally braiding method of the present invention, the sequence numbers that are listed as for knitting yarn such as 1,2,3 among the figure;
Fig. 5 partly reserves yarn for the dull and stereotyped pipe with vertical tube joint product of two forming directions of first embodiment of three-dimension integrally braiding method of the present invention and hangs the yarn schematic diagram;
Fig. 6 is the auxiliary mould schematic diagram of two forming directions flat boards of three-dimension integrally braiding method first embodiment of the present invention with vertical tube joint product.
The specific embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof, but the present invention is not subjected to the restriction of embodiment:
A kind of three-dimension integrally braiding method (hereinafter to be referred as braid method) of making the preform (hereinafter to be referred as multidirectional product) of the crossing complicated shape composite material supporter of two or more solid spatial vertical of the present invention's design is with the three-dimensional four-way of traditional four step rule, five to or five to above square or/and tubular braiding technology be the basis, it is characterized in that in first forming direction part of the multidirectional product of braiding, in the position that two or more solid spatial vertical intersect, adopt ledger line lead-in wire method to reserve second or institute's other forming direction of remainder whole yarns partly of multidirectional product by the geometry shape of follow-up forming direction and braiding pattern requirements after; Continue the first forming direction part of the multidirectional product of braiding again, until finishing; Change weaving direction then, second or remaining other forming direction of institute draw described reservation or add yarn in advance, and the braiding pattern of corresponding adjustment machine, weave second or remaining other forming direction part of institute of multidirectional product, until multidirectional product all braiding finish.
The described forming direction of braid method of the present invention is meant the length direction perpendicular to the product regular cross-section, also is the direction that stitch length forms in the braiding process, is generally perpendicular to the chassis of vertical braiding machine.
The described stitch length of braid method of the present invention is meant the i.e. length of a preform that machine cycles knit out of four steps braiding motion.
The described colored nodel line P of braid method of the present invention is meant that along the weaving forming direction be a series of contours (referring to Fig. 4) that spacing obtains with the stitch length.
Braid method described ledger line lead-in wire method of the present invention or technology, be meant in the process of braiding first forming direction product part, in the corresponding position that two or more solid spatial vertical intersect, the yarn of design quantity is added and draw by the geometry shape of follow-up forming direction and braiding pattern requirement, both required simultaneously the radical of corresponding adding yarn consistent with the number of yarns of being drawn, to satisfy the braiding requirement of first forming direction product part, require the number of yarns of being drawn and the radical summation of institute corresponding adding yarn to satisfy follow-up second forming direction or the braiding requirement partly of other forming direction product again.
The described 3 D multi-directional weaving of braid method of the present invention be meant adopt three-dimensional four-way or three-dimensional five to braided structure technology.But as required, the described 3 D multi-directional integral weaving of braid method of the present invention technology still applicable to three-dimensional five to above braided structure technology.
Be example with the dull and stereotyped braiding process of two forming directions below, further specify braid method of the present invention with vertical tube joint product (referring to Fig. 1):
The first, the main forming direction of selected multidirectional product, and arrange the yarn braiding.This multidirectional product embodiment is made up of rectangular flat and the pipe two parts that intersect vertically.During braiding, be the main forming direction or the first forming direction I,, comprise main yarn system and auxiliary yarns wire system according to the used braiding yarn of this square-section size design radical with the rectangular flat length direction.The main yarn system for the braiding yarn, the auxiliary yarns wire system comprise the 5th to yarn, the 6th to yarn and the 7th to yarn.The auxiliary yarns wire system can add according to the designing requirement of multidirectional product, to improve the mechanical property of product in this direction.For the braiding of this routine plate part, adopt three-dimensional five to get final product to braided structure.The braiding yarn is arranged in rectangle on machine chassis, according to the lateral rows of square braid method and the regular movement of longitudinal row.
The second, design second forming direction or the theory location and the quantity of ledger line lead-in wire of surplus other forming directions.The second forming direction II of this routine multidirectional product is described pipe part.At first utilize CAD (CAD) method to obtain the annulus intersection of pipe part and dull and stereotyped intersecting area, i.e. the theory location or the location drawing (referring to Fig. 4) reserved of pipe yarn; Be that spacing (comprising the intersecting lens part) between the intersecting lens of pipe and flat board marks a series of straight lines of being called colored nodel line P with a braiding stitch length then.The root of flower nodel line P and pipe intersects (or tangent) several times, illustrates when every pipe yarn is reserved to draw yarn several times respectively; The intersection point (or point of contact) that calculates flower nodel line P and loop line is to the length between the intersection point of flower nodel line P and dull and stereotyped boundary line, according to the relation that yarn device columns is directly proportional of taking of hanging yarn on the width of multidirectional product and the braiding machine chassis, can calculate the theoretical corresponding position of taking yarn device row, yarn position of drawing on the multidirectional product; Required yarn arrays of pipe and quantity according to the arc length of flower nodel line loop line that P cuts, can be calculated the radical of at every turn drawing yarn by pro rata, thereby can determine the quantity of ledger line lead-in wire by its appearance and size design.If the multidirectional product of two above forming directions, then the theory location of other forming direction ledger line lead-in wire is same as the described second forming direction II with the quantity design principle.
The ledger line lead-in wire of the three, the second forming direction.This is a key problem in technology of the present invention.When the length that weaves this routine multidirectional product master forming direction I plate part reaches with the tangent place of described pipe part is when drawing the yarn position first time, to draw the second forming direction II pipe, first group of (No.1) yarn (referring to Fig. 4) partly equably.Yarn takes off from hanging the yarn point, is suspended to after the bending on the extension yarn dish of angled placement with it.Hang of the yarn arrays design of yarn dish according to the tubular braiding rule of pipe.Whenever draw an one thread, add an one thread simultaneously.An end that adds yarn hangs on the yarn dish, and the other end hangs on the extension yarn point that just takes off yarn.Drawing yarn and adding yarn all is that partial-length partial-length (length on the pipe that just is about to weave) in dull and stereotyped hangs on the yarn dish.Can make the plate part of product and pipe partly connect into as a whole by the ledger line lead-in wire like this (referring to Fig. 5.Fig. 5 has represented to hang the ledger line lead-in wire signal at yarn point a place, and wherein, a1 is for reserving the yarn of drawing, and a2 is for reserving the yarn that adds).Draw after first group of yarn, weave a stitch length, first group of yarn of drawing inweaved.Draw second group of yarn (No.2) then, ledger line lead-in wire method is with first group, but second group of yarn is divided into left and right two parts symmetrical.By that analogy, can finish the ledger line lead-in wire that second forming direction partly is the pipe part.Reserving the pipe yarn also hangs on the yarn dish in advance by tubular braiding method arrangement yarn.If the multidirectional product of two above forming directions, then the method for other forming direction ledger line lead-in wire is same as the method for described second forming direction ledger line lead-in wire.
The 4th, continue the braiding of main forming direction product part, up to finishing.After the ledger line lead-in wire of second forming direction or other forming direction is finished, continue the braiding of main forming direction product part, up to finishing this part product.This example promptly continues the remaining plate part of braiding by the requirement length of product plate part, finishes up to braiding, after the end yarn tail is cut off.
The 5th, the conversion braiding axle is to weaving to second forming direction or other forming direction.After main forming direction part product braiding was finished, the conversion braiding axle was to continuing to weave second forming direction or other forming direction product part again to second forming direction or other forming direction.This example second forming direction product partly is the pipe part, therefore adopt corresponding circular knitting machine, the pipe braiding yarn of described reservation is transferred on the extension yarn point of braiding machine chassis from hanging the yarn dish, all yarns are pressed the tubular braiding method and are arranged, weave the pipe part of second forming direction by four step rule tubular braiding technology, up to specific length, cut off behind the fixed yarn tail.If the multidirectional product of two above forming directions, then the braid method of other forming direction ledger line lead-in wire is same as the braid method of described second forming direction ledger line lead-in wire.Clearly since second or the other end of other forming direction yarn or subparticipation the braiding of first forming direction product part, so yarn runs through between two parts of product mutually, it is as a whole that different forming directions are connected into.Because the present invention has designed the braid method of reserving yarn or ledger line lead technology dexterously, therefore, braid method of the present invention is applicable to the three-dimension integrally braiding requirement of the multi-directional preform of the crossing various labyrinth shape composite material supporters of two or more solid spatial vertical, knit out the multi-directional preform of the composite material supporter of various labyrinth shapes, be not only applicable to the product that two or more forming directions all are square or tubular braiding, and be applicable to that two or more forming directions are respectively product round and the square braiding, and be the multidirectional product of high-quality integral body (referring to Fig. 3).
For the multidirectional product of two above forming directions, the present invention can have two kinds of braid methods: the one, formerly finish the braiding of first forming direction (main forming direction) product part after, remaining other direction product of the institute of braiding simultaneously braiding partly again; The 2nd, formerly finish the braiding of first forming direction (main forming direction) after, can weave the product part of other forming direction by design sequence successively respectively, after promptly determining good braiding order, weave first forming direction earlier, back braiding second forming direction, weave the 3rd forming direction (referring to Fig. 3) again, the rest may be inferred, all weaves until multidirectional product various piece and finish.Simply say, the quantity of the each weaving forming direction of multidirectional product of two above forming directions and put in order not uniquely, this helps conveniently implementing and raising the efficiency.
In order to overcome the morphotropism of multidirectional product, improve the systematicness and the weaving quality of multidirectional product, braid method of the present invention also can supportingly design auxiliary mould, it is characterized in that this auxiliary mould is used for fixing when braid method commutation of the present invention weaves the part that described product has woven.The partial shape design that described auxiliary mould has woven according to described product.This routine auxiliary mould (referring to Fig. 6) is designed to rectangular metal plate according to described product, and two up and down, the upper plate center is porose, the other parts except that the pipe part on the described multidirectional product plate part can be covered and fix.During the commutation braiding, clamp the first forming direction part of multidirectional product, and fix or hang above machine, with second forming direction or other forming direction knitting tension partly that improves multidirectional product, guarantee that the product weaving forming is good, whole multidirectional product body rule.
The invention has the advantages that ingenious and scientifically designed the braid method of multidirectional product, adopt the ledger line lead technology to realize that the integral body of multidirectional product each several part connects, thereby the complicated abnormal shape preform of two or more weaving forming directions is formed by the fibre bundle continuous weaving, and for body formed only, avoid or reduced the fibre bundle damage that the processing of composite machinery causes behind the composite curing, the continuity of reinforcing fiber bundles in the product and the globality of braided structure have been guaranteed, improved the Mechanics of Machinery character of product, and method is simple, and applicability is wide.
The present invention does not address part and is applicable to prior art.
Further provide the specific embodiment of braid method of the present invention below again.
Embodiment 1:
Adopt the flat board and the vertical tube joint product (referring to Fig. 1) of two forming directions of braid method braiding of the present invention.
The main forming direction I of this product is designed to plate part, and the second forming direction II is the pipe part.Rectangle width 53mm, the thickness 5mm of plate part, length 250mm; The internal diameter 22mm of pipe part, external diameter 26mm, pipe part starting point anomaly plate initial surface 60mm.The dull and stereotyped four step rule three-dimensional five that adopts weaves to square.The braiding yarn is the T300-6K carbon fiber, 20 ° of braid angles, and braiding stitch length 4.5mm, the required yarn radical of design braiding is 605.Being woven into pipe adds line position and begins to add in advance the required yarn of pipe braiding.The design pipe is partly used 350 on yarn, and go between in advance radical and position are referring to table 1.Data are for drawing 175 of yarn radicals in the table 1, and it is identical therewith to add the yarn radical in advance, and total number of threads satisfies 350.Pipe partly weaves the lead-in wire order from No.1 to No.7.The sequence number of knitting yarn row is since 1 arrangement, and order is to arrange from left to right in the face of machine direction.Woven plate part, woven the pipe part again,, finished described multidirectional product integral weaving up to specific length.
Dull and stereotyped and the required pre-ledger line lead-in wire parameter list of vertical tube joint pipe of table 1
| The lead-in wire numbering | The left side radical | Lead-in wire row scope | The right side radical | Draw yarn row scope |
| No.1 | 45 | 25-35 | ||
| No.2 | 11 | 20-25 | 11 | 35-40 |
| No.3 | 9 | 16-20 | 9 | 40-44 |
| No.4 | 3 | 15-16 | 3 | 44-45 |
| No.5 | 9 | 16-20 | 9 | 40-44 |
| No.6 | 11 | 20-25 | 11 | 35-40 |
| No.7 | 44 | 25-35 |
Embodiment 2:
Adopt braid method braiding two forming direction T junction products (referring to Fig. 2) of the present invention.
The main forming direction I and the second forming direction II of this product are plate part, but both size differences.The width 25mm of the former plate, thickness 5mm, length 350mm, the braiding stitch length is designed to 4mm; The cross-sectional width 20mm of latter's plate, thickness 5mm, length 200mm, the braiding stitch length is designed to 4mm.Two forming directions are vertical mutually.Main forming direction I (plate part) adopts four step rule three-dimensional five to the square braiding, and the braiding yarn is the T300-12K carbon fiber, 25 ° of braid angles, and the required yarn radical of design braiding is 136.The second forming direction II (riser part) adopts the braiding of three-dimensional four-way braiding square, and the braiding yarn is the T300-12K carbon fiber, 25 ° of braid angles, and the required yarn radical of design braiding is 124.Through calculating, can only in 2 the stitch length scopes in the corresponding height position of main forming direction I (plate part), draw the braiding yarn that all need.Therefore each yarn quantity of drawing is 31, draws the yarn number of times and is 2, twice and draw between the yarn stitch length at interval, and always drawing number of yarns is 62, and it is identical with number of leads to add amount of thread in advance, draws altogether to weave 124 on yarn.The first forming direction I (plate part) back half-twist is finished in braiding, adopts four step rule three-dimensional five to weave the second forming direction II (riser part) to the square weaving, up to specific length, finishes the integral weaving of described multidirectional product.
Embodiment 3:
Adopt four pipes and a vertical joint product (referring to Fig. 3) that links to each other of box body of five forming directions of the inventive method braiding.
This product partly is main forming direction I with box body, adopts the square weaving braiding of box body cross section; The pipe of four sides can be all the second forming direction II or arrange forming direction and be II, III, IV and V (referring to Fig. 3) in proper order, adopts the braiding of tubular braiding technology.At first with initial cross section, the initial cross section of the box body of multidirectional product part, by this sectional dimension and shaped design braiding yarn arrays as braiding.The braiding yarn adopts T700 12K carbon fiber, is arranged as box body on machine chassis, and braiding selects three-dimensional five for use to braid method, stitch length 5mm; Pipe partly adopts same yarn, and braiding is adopted as three-dimensional six to braid method, 22 ° of braid angles.Box body partial design knitting yarn adds up to 1636, and every pipe is 280 by its Cross section Design braiding yarn.When box body partly is woven into height with the pipe junction, reserve four whole yarns that pipe is required simultaneously four sides.Ledger line lead-in wire parameter sees Table 2.Woven the box body part, more simultaneously or be docile and obedient four pipe parts of preface (II, III, IV, V) braiding,, finished described multidirectional product integral weaving up to specific length.
Table 2 five is to pipe and box body joint product pipe part ledger line lead-in wire parameter list
| Draw the yarn serial number | The left side radical | Draw yarn row scope | The right side radical | Draw yarn row scope |
| No.1 | 33 | 20-30 | ||
| No.2 | 14 | 15-20 | 14 | 30-35 |
| No.3 | 7 | 13-15 | 7 | 35-37 |
| No.4 | 15 | 13-19 | 15 | 31-37 |
| No.5 | 35 | 19-31 |
Be understood that, though the multidirectional product shape of present embodiment is complicated, but simplify or more complicated multidirectional product through multiple variation on its basis, braid method of the present invention integral weaving is equally smoothly finished, the minimizing of for example described pipe partial amt and increase; Internal diameter, the external diameter of pipe part are the same or different with thickness; Described box body partly pick out pipe part position height, about and symmetry with asymmetric variation etc., their ledger line lead-in wire rule all is the same with braid method, can adopt braid method manufacturing of the present invention, also be that braid method of the present invention has extensively and favorable applicability and practicality.
Claims (3)
1. the three-dimension integrally braiding method of a multi-directional preform, this braid method is with the three-dimensional four-way of four step rule, five to or five to above square or/and tubular braiding technology be the basis, it is characterized in that in first forming direction part of braiding multi-directional preform, in the position that two or more solid spatial vertical intersect, after adopting ledger line lead-in wire method to reserve remaining other forming direction of second or institute whole yarns partly of multi-directional preform by the geometry shape of follow-up forming direction and braiding pattern requirement, continue the first forming direction part of braiding multi-directional preform again, until finishing; Change weaving direction then, second or remaining other forming direction of institute draw described reservation yarn, and the braiding pattern of corresponding adjustment machine, remaining other forming direction part of second or institute of braiding multi-directional preform is finished until the whole braidings of multi-directional preform.
2. the three-dimension integrally braiding method of multi-directional preform according to claim 1 is characterized in that this three dimensional knitting method adopts supporting auxiliary mould to secure the above the part that product has woven when the commutation braiding.
3. auxiliary mould that is used for the described braid method of claim 2, it is characterized in that this auxiliary mould can be designed to rectangular metal plate according to the partial shape that described product has woven, two up and down, and can fix, and there is described second forming direction part or other forming direction are partly commutated hole that braiding stretches out at the upper plate center.
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| FR2907800B1 (en) * | 2006-10-27 | 2009-03-20 | Airbus France Sas | THREE DIMENSIONAL SURFACING WEAVING |
| CN101487169B (en) * | 2008-01-16 | 2013-03-13 | 阚玉华 | Three-dimensional full five-direction knitting preformed member and its knitting method |
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