CN104476696B - The method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point - Google Patents
The method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point Download PDFInfo
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- CN104476696B CN104476696B CN201410741142.3A CN201410741142A CN104476696B CN 104476696 B CN104476696 B CN 104476696B CN 201410741142 A CN201410741142 A CN 201410741142A CN 104476696 B CN104476696 B CN 104476696B
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- draw point
- ultrasound wave
- stereo fabric
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Abstract
The invention discloses the method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point, utilize the supersonic vibration that ultrasonic equipment produces, the draw point that will arrange in advance, Z-direction is implanted in fiber cloth laying, after treating that draw point implantation is complete, Z-direction draw point is replaced as fiber or fiber rod, forms three dimension stereo fabric.The method that in stereo fabric of the present invention preparation, ultrasound wave implants draw point, fiber cloth laying is carried out the ultrasonic implantation of Z-direction draw point, Z-direction draw point is that passage preset by Z-direction displacement fiber, form three dimension stereo fabric, solve plane large scale, a molding difficult problem for high thickness stereo fabric, manpower needed for operational process of craft is few, low cost, easy to use, man-hour is few, can be effectively improved production efficiency.
Description
Technical field
The invention belongs to three-dimensional composite material precast body manufacturing technology field, specially ultrasound wave draw point implanted prosthetics is in Z-direction
The programmable solid of spacing knits the method that in the application in preparation, i.e. stereo fabric preparation, ultrasound wave implants draw point.
Background technology
Composite has the features such as light weight, intensity height, Burning corrosion resistance, is widely used to the most advanced and sophisticated necks such as Aeronautics and Astronautics
Territory.Three dimensional structure woven composite has thickness direction and horizontal comprehensive enhancing, increases substantially the anti-interlayer of material
Shear strong, and possess the forming ability of abnormal complex component, therefore have extensively in Aeronautics and Astronautics, the field such as military and civilian
General application.Prepare the technique of 3 D stereo composite preform at present to have 3 D weaving, stitching, carefully compile puncture, Z-pin
Technique etc..
The three-dimensional braid that three dimensional weaving technique weaves can reach any thickness, and has fiber to pass through thickness direction, from
And making D braided composites is a not stratified overall structure, fiber is interweaved in space, forms Integral net shaped knot
Structure, has preferable interlayer performance, shock resistance and some other premium properties, overcomes tradition laminated composite
Some fatal defects；Simultaneously can directly be woven into various profiled piece, it is to avoid the fibre damage that post-treatment causes, improve multiple
The damage tolerance of condensation material.
Sewing process has considerable restraint on the thickness of fabric, and current thickness is more than 40mm, and fiber volume fraction requires big
In the precast body of 50%, sewing process is relatively difficult to achieve, and in the face of material, performance damage ratio is more serious.
Current thin compile puncture technique can the higher fabric of molding thickness, first by a number of elongated draw point according to necessarily
Line-spacing and row away from being arranged in an integral array, then the most woven fiber cloth is placed in the Z-direction draw point of equidistantly arrangement
The top of matrix, utilizes the template at draw point matrix top, drives fiber cloth to move down.After fiber cloth passes draw point, it is pushed to steel
It is closely knit that pressurization is implemented in the lower end of pin, after certain altitude to be achieved, then is replaced Z-direction draw point one by one by Z-direction fiber, forms entirety
Puncture fabric.
But the thin planar dimension aspect compiling puncture process fabrics has considerable restraint, and the manpower, the equipment frock that need are more,
Process costs is the highest；During molding large-size components, size and the stability of draw point matrix are wayward, and technique carries out difficulty relatively
Greatly.
Z-pin technique is mainly used in strengthening laying prepreg or woven foam sandwich composite material, prepreg before curing or bubble
Foam thickness of interlayer direction is directly embedded into the stub of rigidity, and this stub is commonly referred to Z-pin.Z-pin can be (stainless with metal
Steel, aluminium alloy etc.) or nonmetal (carbon fiber, glass fibre, Kevlar fiber etc.).
Along with the demand of composite is gradually changed by Defence business to large scale, global formation, how to ensure 3 D stereo
Realize the low cost of fabric, high efficiency production molding on the premise of fabric property, become problem demanding prompt solution.
Summary of the invention
In order to overcome thin volume in prior art to puncture process fabrics restriction in terms of planar dimension, and the manpower of needs, equipment
Frock is more, and process costs is the highest, and during molding large-size components, size and the stability of draw point matrix are wayward, technique
Carry out the defects such as difficulty is bigger, it is an object of the invention to provide the method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is as follows:
The method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point, utilizes the supersonic vibration that ultrasonic equipment produces, will be pre-
The draw point first arranged, Z-direction is implanted in fiber cloth laying, after treating that draw point implantation is complete, Z-direction draw point is replaced fibroblast
Dimension or fiber rod, form three dimension stereo fabric.
Said method will in advance to draw point arrange, above-mentioned draw point position, draw point Z-direction spacing, draw point arrangement overall dimensions can
According to the Demand Design to gained stereo fabric.Overall dimensions and Z-direction fiber spacing design draw point according to stereo fabric are straight
Footpath, draw point length depends on fabric thickness, and aligning method that draw point is concrete and diameter and the specifically chosen of length thereof all can be joined
According to prior art.
Above-mentioned fiber cloth laying has a given layer density, concrete DENSITY ROOTS trample factually it needs to be determined that.
Draw point can be implanted in carbon cloth layer by supersonic vibration that above-mentioned ultrasonic equipment produces the most step by step, it is not necessary to right
Draw point applies extra pressure, improves perpendicularity when draw point is implanted.
When draw point is implanted, in order to the fiber cloth redundancy that will produce when implanting is launched to fabric edge, it is to avoid middle part forms gauffer and lacks
Falling into, preferably draw point uses the mode implanted by fiber cloth laying center to periphery.
Said method compile puncture direction thin with prior art is the most contrary, can realize the preparation of large-sized composite material, and need
Manpower, the equipment frock wanted are little, and process costs is the lowest, during molding large-size components, and the size of draw point matrix and stability
Easy to control, easy and convenient to handle.
Described ultrasonic equipment includes ultrasonic generator, transducer and the ultrasound wave work head being linked in sequence, wherein, ultrasonic
Ripple work head is strip and arranges straight down, and the bottom of ultrasound wave work head is planar structure.
The horn changing transducer vibrational amplitude is included as prior art ultrasonic generator.
Said method, by adjusting amplitude and the frequency of ultrasonic generator generation, is delivered to draw point top by ultrasound wave work head
Portion, is implanted to draw point in stereo fabric.
Ultrasonic frequency range is 30kHz～60kHz, and amplitude range is generally 30 μm～100 μm, according to draw point diameter
Size, selects different frequencies and amplitude range, preferably less than frequency high amplitude, because draw point diameter is the biggest, and the resistance of implanted
Power is the highest, and the amplitude of required setting is the highest.
The shape of ultrasound wave work head can be cylinder or cuboid or other shape.The bottom of ultrasound wave work head is work
Face, its shape can be designed as rectangle, circle etc. according to the flat shape of fabric, and the size of work surface is according to supersonic generator
The amplitude and the disposable draw point quantity implanted that produce select.
Described ultrasonic equipment also includes support, cross slide way, linear slide block, coarse adjustment fixture and telescopically adjustable bar；Institute
State cross slide way and be located on support and have more than two be parallel to each other, between two relative cross slide waies, be provided with transiting rod；
Transiting rod can move, to control the motion in first direction of work by relatively transverse guide rail；Linear slide block is located on transiting rod, control
The movement in work head another one direction processed；Described coarse adjustment fixture arranges straight down and is connected on linear slide block；Described can
Telescopic advance lever arranges straight down and is connected to the bottom of coarse adjustment fixture；The bottom of described telescopically adjustable bar and transducer
Connect.
When the relatively transverse guide rail of transiting rod moves, ultrasound wave work head is driven to complete the movement of X-direction；Linear slide block is in transition
When moving on bar, ultrasound wave work head is driven to complete the movement of Y-direction.
Above by coarse adjustment fixture adjust telescopically adjustable bar length, thus regulate ultrasound wave work head distance draw point away from
From, make ultrasound wave work head under the effect of ultrasonic generator, draw point can be implanted in stereo fabric.Coarse adjustment fixture Z
Can control manually or by existing plant equipment to movement.
Linear slide block can accurately control X and the Y-direction motion of coarse adjustment fixture, thus drives X and the Y-direction fortune of ultrasound wave work head
Dynamic.
Described ultrasonic equipment also includes chuck and lower chuck, and set upper chuck is located at bottom telescopically adjustable bar, described
Lower chuck is connected in bottom upper chuck by screw rod, and described transducer is located in lower chuck, and ultrasound wave work head is through at the bottom of lower chuck
Portion is connected to the bottom of transducer.Above-mentioned improved structure is stable, and ultrasound wave work head operationally will not produce in-plane
Side-play amount.
Described fiber cloth laying meets layer density requirements, before draw point is implanted, pressurizes closely knit to fiber cloth laying in advance；
In draw point implantation process, by keeping pressurized state, Z-direction scrim cloth is made to reach a layer density requirements.So can enter one
Step ensures the quality of gained stereo fabric.
Layer density requirements determines according to actual needs.
The guidance quality of above-mentioned draw point controls by means of template, and template is layer structure, when draw point top flushes with die head
Time, remove a top layer template, proceed draw point and implant, the like；After draw point is implanted, on fiber cloth laying top
Portion reserves a template, and the tip position bottom fiber cloth laying inserts one layer of template, and takes frock clamp to fabric
Bolster is clamped, and controls thickness direction required size, then moves to carry out on thread-changing table Z by the fabric after clamping
To fiber or the displacement of fiber rod, after replacement completion, remove frock clamp and bolster, form three dimension stereo fabric.
Thickness direction required size depends on and practice needs.
The application draw point needle point penetrates the whole thickness direction of fiber cloth laying, and after draw point is implanted, needle point is positioned at dimension cloth laying
Bottom.
Thread-changing table and to the displacement of fiber or fiber rod with reference to prior art.
Preferably, each implantation depth of draw point is 10mm.So can further ensure the stability that draw point is implanted.
Preferably, the length of draw point exceeds fiber cloth laying Z-direction thickness 60mm～120mm.So can be further ensured that draw point
Penetrance and the quality of gained fabric.
Above-mentioned Z-direction is the thickness direction of fiber cloth laying.
The NM technology of the present invention is all with reference to prior art.
The method that in stereo fabric of the present invention preparation, ultrasound wave implants draw point, carries out the ultrasonic of Z-direction draw point to fiber cloth laying
Implanting, Z-direction draw point is that passage preset by Z-direction displacement fiber, forms three dimension stereo fabric, solves plane large scale, high thickness
A molding difficult problem for degree stereo fabric, the manpower needed for operational process of craft is few, low cost, easy to use, man-hour is few, can have
Effect improves production efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in stereo fabric of the present invention preparation, ultrasound wave implants draw point.
Fig. 2 is ultrasonic equipment structural representation of the present invention.
Fig. 3 is that in detailed description of the invention, sequential schematic implanted by draw point.
In figure, 1 be transducer, 2 be ultrasound wave work head, 3 for support, 4 for cross slide way, 5 for linear slide block, 6
For coarse adjustment fixture, 7 be telescopically adjustable bar, 8 be upper chuck, 9 be lower chuck, 10 for screw rod, 11 is transiting rod, 12
For fiber cloth laying, 13 be draw point arrangement, 14 be template.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment, but present disclosure
It is not limited solely to the following examples.
The technological process of technique implanted by ultrasound wave draw point: 1. carbon cloth laying the most ultrasonic closely knit implantation draw point 4. Z-direction of 2. pressurizeing is put
Change.Concretely comprise the following steps:
1. carry out laying after meeting the carbon cloth cutting of layer density requirements, and it is closely knit to carry out in advance pressurizeing, and makes up to layer
Density requirements；
2. the fiber cloth laying of satisfied layer density requirements is positioned on pricking device operating platform, and uses pressurized equipment to carry out
Pressurization；
3., after fabric thickness reaches technological requirement scope, (length of draw point exceeds fiber cloth laying Z-direction thickness to carry out draw point
80mm) arrangement, then adjusts amplitude and the frequency of supersonic generator, thus controls level and the Z of ultrasound wave work head
To motion, according to the order from center to periphery, carry out ultrasound wave draw point implantation, each implantation depth about 10mm, Z-direction
Draw point is replaced for Z-direction fiber or fiber rod and is provided passage；
4. Z-direction draw point is replaced as fiber or fiber rod, to form three-dimensional integral fabric.
As in figure 2 it is shown, ultrasonic generator, transducer and ultrasound wave work head that ultrasonic equipment includes being linked in sequence, wherein,
Ultrasound wave work head is strip and arranges straight down, and the bottom of ultrasound wave work head is planar structure；
Above-mentioned ultrasonic equipment also includes support, cross slide way, linear slide block, coarse adjustment fixture, telescopically adjustable bar, upper folder
Dish and lower chuck；Described cross slide way is located on support and has more than two be parallel to each other, two relative cross slide waies
Between be provided with transiting rod；Transiting rod can move, to control the motion in first direction of work by relatively transverse guide rail；Linear slide block
It is located on transiting rod, controls the movement in work head another one direction；Described coarse adjustment fixture arranges straight down and is connected in line
On property slide block；Described telescopically adjustable bar arranges straight down and is connected to the bottom of coarse adjustment fixture；Set upper chuck is located at
Bottom telescopically adjustable bar, described lower chuck is connected in bottom upper chuck by screw rod, and described transducer is located in lower chuck, super
Sound wave work head passes the bottom being connected to transducer bottom lower chuck.
The guidance quality of draw point controls by means of template, and template is layer structure, when draw point top flushes with die head,
Remove a top layer template, proceed draw point and implant, the like；After draw point is implanted, pre-at fiber cloth laying top
Stay a template, and the tip position bottom fiber cloth laying inserts one layer of template, and take frock clamp upper and lower to fabric
Template is clamped, and controls thickness direction required size, then moves to carry out on thread-changing table Z-direction by the fabric after clamping
Fiber or the displacement of fiber rod, after replacement completion, remove frock clamp and bolster, form three dimension stereo fabric.
Fiber cloth specification MT300-3K carbon cloth, layer density 25-26 layer/cm；Gained stereo fabric size is 2m × 1m,
Thickness is 120mm；The frequency of supersonic generator is 35.7kHz, and amplitude is the 30% of peak swing, and peak swing is
100μm；The a diameter of 1.1mm of draw point, rectangular arrangement, pin spacing is 2.4mm；The bottom of ultrasound wave work head is 18
The rectangle of × 25mm.
Z-pin strengthens technique and first the fiber cloth meeting a given layer density requirements is positioned over operating platform, and equipment for the treatment of is to fiber
Cloth laying carry out pressurizeing closely knit after, arrange the draw point designed at fiber cloth upper surface, the draw point matrix in Fig. 1 by draw point and
Template collectively constitutes.After treating draw point arrangement, the overall dimensions of draw point arrangement is tightened up, makes overall dimensions, spacing
Control within the scope of technological requirement.Use pressurized equipment, again the fiber cloth laying of bottom is pressurized and at pressurize
State.
After ultrasound wave work head is according to installing as shown in Figure 2, shown in Fig. 3, the draw point arranged is taked from centre
The mode that region A implants to B, C region, both sides carries out draw point implantation.In order to improve the perpendicularity of implantation, take to divide by several times
Region implantation, each implantation depth is 10mm.When draw point top is implanted to die head, removes one layer of template, continue
Continue and carry out draw point implantation.After draw point is implanted, one layer of template is reserved at top, and inserts one layer of template at bottom tip position,
Take frock clamp that fabric bolster is clamped, control thickness direction size within the scope of technological requirement.Will clamping
After fabric move to carry out on thread-changing table Z-direction fiber or the displacement of fiber rod, remove frock clamp, form 3 D stereo
Fabric.
The method that in the preparation of above-mentioned stereo fabric, ultrasound wave implants draw point, carries out the ultrasonic of Z-direction draw point to fiber cloth laying and plants
Entering, Z-direction draw point is that passage preset by Z-direction displacement fiber, forms three dimension stereo fabric, solves plane large scale, high thickness
A stereo fabric molding difficult problem, the manpower needed for operational process of craft is few, low cost, easy to use, man-hour is few, can effectively carry
High efficiency, and the implantation of draw point Z-direction is i.e. stable the most accurate.
Claims (10)
1. the method that in a stereo fabric preparation, ultrasound wave implants draw point, it is characterised in that: utilize ultrasonic equipment to produce
Supersonic vibration, the draw point Z-direction arranged in advance is implanted in fiber cloth laying, treat draw point implant complete after, by Z
It is replaced as fiber or fiber rod to draw point, forms three dimension stereo fabric.
2. the method that in stereo fabric preparation as claimed in claim 1, ultrasound wave implants draw point, it is characterised in that: described
The ultrasonic equipment ultrasonic generator, transducer and the ultrasound wave work head that include being linked in sequence, wherein, ultrasound wave work head
For strip and arranging straight down, the bottom of ultrasound wave work head is planar structure.
3. the method that in stereo fabric preparation as claimed in claim 2, ultrasound wave implants draw point, it is characterised in that: described
Ultrasonic equipment also include support, cross slide way, linear slide block, coarse adjustment fixture and telescopically adjustable bar；Described laterally lead
Rail is located on support and has more than two be parallel to each other, and is provided with transiting rod between two relative cross slide waies；Transiting rod
Can move, to control the motion in first direction of work by relatively transverse guide rail；Linear slide block is located on transiting rod, controls work
The movement in head another one direction；Described coarse adjustment fixture arranges straight down and is connected on linear slide block；Described scalable tune
Pole arranges straight down and is connected to the bottom of coarse adjustment fixture；The bottom of described telescopically adjustable bar is connected with transducer.
4. the method that in stereo fabric preparation as claimed in claim 3, ultrasound wave implants draw point, it is characterised in that: described
Ultrasonic equipment also include chuck and lower chuck, set upper chuck is located at bottom telescopically adjustable bar, described lower chuck lead to
Crossing screw rod and be connected in bottom chuck, described transducer is located in lower chuck, and ultrasound wave work head is connected to bottom lower chuck
The bottom of transducer.
5. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature
It is: fiber cloth laying meets layer density requirements, before draw point is implanted, in advance fiber cloth laying is pressurizeed closely knit；
In draw point implantation process, by keeping pressurized state, Z-direction scrim cloth is made to reach a layer density requirements.
6. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature exists
In: the guidance quality of draw point controls by means of template, and template is layer structure, when draw point top flushes with die head,
Remove a top layer template, proceed draw point and implant, the like；After draw point is implanted, pre-at fiber cloth laying top
Stay a template, and the tip position bottom fiber cloth laying inserts one layer of template, and take frock clamp upper and lower to fabric
Template is clamped, and controls thickness direction required size, then the fabric after clamping is moved to carry out Z-direction on thread-changing table fine
Dimension or the displacement of fiber rod, after replacement completion, remove frock clamp and bolster, form three dimension stereo fabric.
7. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature
It is: each implantation depth of draw point is 10mm.
8. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature
It is: draw point uses the mode implanted by fiber cloth laying center to periphery.
9. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature
It is: the length of draw point exceeds fiber cloth laying Z-direction thickness 60mm～100mm.
10. the method that in the stereo fabric preparation as described in claim 1-4 any one, ultrasound wave implants draw point, its feature
Being: the frequency of supersonic vibration is 30kHz～60kHz, amplitude is 30 μm～100 μm.
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| CN201410741142.3A CN104476696B (en) | 2014-12-08 | 2014-12-08 | The method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point |
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| CN201410741142.3A CN104476696B (en) | 2014-12-08 | 2014-12-08 | The method that in the preparation of a kind of stereo fabric, ultrasound wave implants draw point |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105922474B (en) * | 2016-05-24 | 2017-12-26 | 中材科技股份有限公司 | A kind of ultrasonic wave is implanted into draw point device automatically |
| CN107009541B (en) * | 2017-06-13 | 2019-10-22 | 西北工业大学 | Composite material Z-direction enhances ultrasonic method for implantation |
| CN111070720B (en) * | 2019-12-31 | 2021-12-17 | 中国人民解放军国防科技大学 | Fiber position control device and method for fiber reinforced composite material |
| CN112297282B (en) * | 2020-09-29 | 2022-08-05 | 北京机科国创轻量化科学研究院有限公司 | Automatic Z-direction fiber implantation method for composite material preform |
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|---|---|---|---|---|
| US5800672A (en) * | 1994-06-07 | 1998-09-01 | Aztex, Inc. | Ultrasonic fastening system and method |
| WO1999046095A1 (en) * | 1998-03-13 | 1999-09-16 | Aztex, Inc. | Method of manufacturing a perforated laminate |
| CN203957370U (en) * | 2014-06-30 | 2014-11-26 | 南京航空航天大学 | The device of the ultrasonic implantation of Z-pin |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7409757B2 (en) * | 2005-06-22 | 2008-08-12 | Northrop Grumman Corporation | Automated Z-pin insertion technique using universal insertion parameters |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5800672A (en) * | 1994-06-07 | 1998-09-01 | Aztex, Inc. | Ultrasonic fastening system and method |
| WO1999046095A1 (en) * | 1998-03-13 | 1999-09-16 | Aztex, Inc. | Method of manufacturing a perforated laminate |
| CN203957370U (en) * | 2014-06-30 | 2014-11-26 | 南京航空航天大学 | The device of the ultrasonic implantation of Z-pin |
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Effective date of registration: 20200225 Address after: 210012, No. 30, Xi An Road, Yuhua West Road, Jiangsu, Nanjing Patentee after: Nanjing Glass Fibre Research and Design Institute company limited Address before: 210012, No. 30, Xi An Road, Yuhua West Road, Jiangsu, Nanjing Patentee before: Sinoma Science & Technology Co.,Ltd. |