CN104476696A - Method for ultrasonically implanting draw point in preparation of three-dimensional fabric - Google Patents
Method for ultrasonically implanting draw point in preparation of three-dimensional fabric Download PDFInfo
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- CN104476696A CN104476696A CN201410741142.3A CN201410741142A CN104476696A CN 104476696 A CN104476696 A CN 104476696A CN 201410741142 A CN201410741142 A CN 201410741142A CN 104476696 A CN104476696 A CN 104476696A
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- draw point
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- stereo fabric
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Abstract
The invention discloses a method for ultrasonically implanting a draw point in the preparation of a three-dimensional fabric. The method comprises the steps of implanting draw points which are arranged in advance into a fiber cloth laying layer in the Z direction by utilizing the ultrasonic vibration of an ultrasonic device, and replacing the Z-direction draw points with fibers or fiber rods to form the three-dimensional fabric after the draw points are completely implanted. According to the method, the Z-directional draw points are implanted into the fiber cloth laying layer, and the Z-directional draw points are used for preliminarily arranging passages for the Z-directional replacement fibers to form the three-dimensional fabric, so that the forming difficulty of the plane large-sized and large-thickness three-dimensional fabric can be solved, an operating process is small in manpower consumption, the cost is low, the use is convenient, the working time is little, and the production efficiency can be effectively improved.
Description
Technical field
The invention belongs to three-dimensional composite material precast body manufacturing technology field, be specially ultrasonic wave draw point implanted prosthetics and knit application in preparation in the programmable solid of Z-direction spacing, namely in stereo fabric preparation, ultrasonic wave implants the method for draw point.
Background technology
Composite has the features such as quality is light, intensity is high, Burning corrosion resistance, is widely used in the leading-edge fields such as Aeronautics and Astronautics.Three-dimensional structure woven composite has thickness direction and horizontal comprehensive enhancing, and the anti-interlayer shear increasing substantially material is strong, and possesses the forming ability of abnormal complex component, therefore has a wide range of applications in Aeronautics and Astronautics, military affairs and the field such as civilian.The technique preparing 3 D stereo composite preform at present has 3 D weaving, stitching, carefully compiles puncture, Z-pin technique etc.
The three-dimensional braid that three dimensional weaving technique weaves can reach any thickness, and there is fiber to pass through thickness direction, thus make D braided composites be a not stratified overall structure, fiber is interweaved in space, form integral network structure, there is good interlayer performance, shock resistance and some other premium properties, overcome some fatal defects of traditional laminated composite; Can directly be woven into various profiled piece simultaneously, avoid the fibre damage that aft-loaded airfoil causes, improve the damage tolerance of composite.
Sewing process has considerable restraint on the thickness of fabric, and current thickness is greater than 40mm, and fiber volume fraction requires the precast body being greater than 50%, the more difficult realization of sewing process, and in the face of material, performance damage is more serious.
Current thin puncture technique of compiling can the higher fabric of molding thickness, first the elongated draw point of some is arranged in an integral array according to certain line-spacing and row distance, then by the top in the Z-direction draw point matrix of equidistantly arrangement of woven fibre placement in advance, utilize the template at draw point matrix top, drive fiber cloth to move down.Fiber cloth is through after draw point, and the lower end enforcement pressurization being pushed to draw point is closely knit, after certain altitude to be achieved, then replaces Z-direction draw point one by one by Z-direction fiber, forms integrated piercing fabric.
But there is considerable restraint the thin planar dimension aspect compiling puncture process fabrics, and the manpower needed, equipment frock are more, and process costs is very high; During shaping large-size components, size and the stability of draw point matrix are wayward, and it is larger that technique carries out difficulty.
Z-pin technique is mainly used in strengthening laying prepreg or woven foam sandwich composite material, and prepreg before curing or foam layer thickness direction directly embed the stub of rigidity, and this stub is commonly referred to Z-pin.Z-pin can use metal (stainless steel, aluminium alloy etc.) or nonmetal (carbon fiber, glass fibre, Kevlar fiber etc.).
Along with Defence business changes to large scale, global formation gradually to the demand of composite, under the prerequisite ensureing three dimension stereo fabric performance, how to realize fabric low cost, high efficiency production are shaping, become problem demanding prompt solution.
Summary of the invention
In order to overcome the restriction of thin volume puncture process fabrics in planar dimension in prior art, and the manpower needed, equipment frock are more, process costs is very high, during shaping large-size components, size and the stability of draw point matrix are wayward, technique carries out the defects such as difficulty is larger, the object of this invention is to provide ultrasonic wave in the preparation of a kind of stereo fabric and implants the method for draw point.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
In stereo fabric preparation, ultrasonic wave implants a method for draw point, utilizes the ultrasonic vibration that ultrasonic equipment produces, by the draw point arranged 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.
Said method will in advance to draw point arrangement, above-mentioned draw point position, draw point Z-direction spacing, draw point arrangement appearance and size can according to the Demand Design to gained stereo fabric.According to appearance and size and the Z-direction fiber spacing design draw point diameter of stereo fabric, draw point length depends on fabric thickness, and the concrete selection of the aligning method that draw point is concrete and diameter and length all can refer to prior art.
Above-mentioned fiber cloth laying has a given layer density, and concrete DENSITY ROOTS is trampled factually to be needed to determine.
Draw point can successfully be implanted in carbon cloth layer by ultrasonic vibration that above-mentioned ultrasonic equipment produces step by step, without the need to applying extra pressure to draw point, improves perpendicularity when draw point is implanted.
When draw point is implanted, in order to the fiber cloth redundancy produced when implanting be launched to fabric edge, avoid middle part to form gauffer defect, preferred draw point adopts the mode implanted to periphery by fiber cloth laying center.
Said method is completely contrary with direction of puncturing of compiling thin in prior art, can realize the preparation of large-sized composite material, and the manpower needed, equipment frock is little, process costs is very low, during shaping large-size components, size and the stability of draw point matrix are easy to control, easy and convenient to handle.
Described ultrasonic equipment comprises the ultrasonic generator, transducer and the ultrasonic wave working head that are linked in sequence, and wherein, ultrasonic wave working head is strip and arranges straight down, and the bottom of ultrasonic wave working head is planar structure.
The ultrasonic transformer changing transducer vibrational amplitude is comprised as prior art ultrasonic generator.
Said method, by adjusting amplitude and the frequency of ultrasonic generator generation, is delivered to draw point top by ultrasonic wave working head, is implanted in stereo fabric by draw point.
Ultrasonic frequency range is 30kHz ~ 60kHz, and amplitude range is generally 30 μm ~ 100 μm, according to the size of draw point diameter, select different frequencies and amplitude range, preferred low frequency high amplitude, because draw point diameter is larger, the resistance of implanted is higher, and the amplitude of required setting is higher.
The shape of ultrasonic wave working head can be cylinder or cuboid or other shape.The bottom of ultrasonic wave working head is working face, and its shape can be designed to rectangle, circle etc. according to the flat shape of fabric, and the draw point quantity of the amplitude that the size of working face produces according to supersonic generator and disposable implantation is selected.
Described ultrasonic equipment also comprises support, cross slide way, linear slide block, coarse adjustment fixture and scalable adjusting rod; Described cross slide way to be located on support and to have more than two that are parallel to each other, and is provided with transiting rod between two relative cross slide waies; Transiting rod can move relative to cross slide way, to control the motion in first direction of work; Linear slide block is located on transiting rod, controls the movement in working head another one direction; Described coarse adjustment fixture arranges straight down and is connected on linear slide block; Described scalable adjusting rod arranges straight down and is connected to the bottom of coarse adjustment fixture; The bottom of described scalable adjusting rod is connected with transducer.
Transiting rod, when cross slide way moves, drives ultrasonic wave working head to complete the movement of X-direction; When linear slide block moves on transiting rod, ultrasonic wave working head is driven to complete the movement of Y-direction.
Adjust the length of scalable adjusting rod above by coarse adjustment fixture, thus regulate the distance of ultrasonic wave working head distance draw point, make ultrasonic wave working head under the effect of ultrasonic generator, draw point can be implanted in stereo fabric.Coarse adjustment fixture Z-direction move and can control by hand or by existing plant equipment.
Linear slide block accurately can control X and the Y-direction motion of coarse adjustment fixture, thus drives X and the Y-direction motion of ultrasonic wave working head.
Described ultrasonic equipment also comprises chuck and lower chuck, set upper chuck is located at bottom scalable adjusting rod, described lower chuck is connected in bottom upper chuck by screw rod, and described transducer is located in lower chuck, and ultrasonic wave working head is through the bottom being connected to transducer bottom lower chuck.Above-mentioned modified node method is stablized, and ultrasonic wave working head operationally can not produce the side-play amount of in-plane.
Described fiber cloth laying meets layer density requirements, before draw point is implanted, carries out pressurization in advance closely knit to fiber cloth laying; In draw point implantation process, by keeping pressurized state, Z-direction scrim cloth is made to reach a layer density requirements.The quality of gained stereo fabric can be ensured so further.
Layer density requirements is determined 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, removes a top layer template, proceeds draw point and implants, the like; After draw point is implanted, a reserved template at fiber cloth laying top, and the tip position bottom fiber cloth laying inserts one deck template, and take frock clamp to clamp fabric bolster, control thickness direction required size, then the fabric after clamping is moved to displacement thread-changing table carrying out Z-direction fiber or 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's draw point needle point penetrates the whole thickness direction of fiber cloth laying, and after draw point is implanted, needle point is positioned at the bottom of dimension cloth laying.
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.Further can ensure the stability that draw point is implanted like this.
Preferably, the length of draw point exceeds fiber cloth laying Z-direction thickness 60mm ~ 120mm.The penetrability of draw point and the quality of gained fabric can be ensured so further.
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.
In stereo fabric preparation of the present invention, ultrasonic wave implants the method for draw point, fiber cloth laying is carried out to 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 a shaping difficult problem for plane large scale, high thickness stereo fabric, manpower needed for operational process of craft is few, cost is low, easy to use, man-hour is few, can effectively enhance productivity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in stereo fabric of the present invention preparation, ultrasonic 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 ultrasonic wave working head, 3 be support, 4 be cross slide way, 5 be linear slide block, 6 be coarse adjustment fixture, 7 be scalable adjusting rod, 8 be upper chuck, 9 be lower chuck, 10 for screw rod, 11 is transiting rod, and 12 is fiber cloth laying, 13 is that draw point arrangement, 14 is for template.
Detailed description of the invention
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
The technological process of technique implanted by ultrasonic wave draw point: 1. 2. carbon cloth laying pressurizes the 4. Z-direction displacement of closely knit 3. ultrasonic implantation draw point.Concrete steps are:
1. carry out laying by after the carbon cloth cutting meeting layer density requirements, and it is closely knit to carry out pressurization in advance, makes it to reach a layer density requirements;
2. the fiber cloth laying of satisfied layer density requirements is positioned on pricking device operating platform, and adopts pressurized equipment to pressurize;
3. reach after technological requirement scope until fabric thickness, carry out draw point (length of draw point exceeds fiber cloth laying Z-direction thickness 80mm) arrangement, then amplitude and the frequency of supersonic generator is adjusted, thus control level and the Z-direction motion of ultrasonic wave working head, according to the order from center to periphery, carry out the implantation of ultrasonic wave draw point, each implantation depth is about 10mm, and Z-direction draw point is replaced for Z-direction fiber or fiber rod and provided passage;
4. Z-direction draw point is replaced as fiber or fiber rod, to form three-dimension integrally fabric.
As shown in Figure 2, ultrasonic equipment comprises the ultrasonic generator, transducer and the ultrasonic wave working head that are linked in sequence, and wherein, ultrasonic wave working head is strip and arranges straight down, and the bottom of ultrasonic wave working head is planar structure;
Above-mentioned ultrasonic equipment also comprises support, cross slide way, linear slide block, coarse adjustment fixture, scalable adjusting rod, upper chuck and lower chuck; Described cross slide way to be located on support and to have more than two that are parallel to each other, and is provided with transiting rod between two relative cross slide waies; Transiting rod can move relative to cross slide way, to control the motion in first direction of work; Linear slide block is located on transiting rod, controls the movement in working head another one direction; Described coarse adjustment fixture arranges straight down and is connected on linear slide block; Described scalable adjusting rod arranges straight down and is connected to the bottom of coarse adjustment fixture; Set upper chuck is located at bottom scalable adjusting rod, and described lower chuck is connected in bottom upper chuck by screw rod, and described transducer is located in lower chuck, and ultrasonic wave working head is through 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, removes a top layer template, proceeds draw point and implants, the like; After draw point is implanted, a reserved template at fiber cloth laying top, and the tip position bottom fiber cloth laying inserts one deck template, and take frock clamp to clamp fabric bolster, control thickness direction required size, then the fabric after clamping is moved to displacement thread-changing table carrying out Z-direction fiber or 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, and thickness is 120mm; The frequency of supersonic generator is 35.7kHz, and amplitude is 30% of peak swing, and peak swing is 100 μm; Draw point diameter is 1.1mm, journey rectangular arranged, and pin spacing is 2.4mm; The bottom of ultrasonic wave working head is the rectangle of 18 × 25mm.
Z-pin strengthens technique and first the fiber cloth meeting a given layer density requirements is positioned over operating platform, until equipment fiber cloth laying carried out pressurization closely knit after, to arrange the draw point designed at fiber cloth upper surface, the draw point matrix in Fig. 1 is made up of jointly draw point and template.After treating draw point arrangement, the appearance and size of draw point arrangement is tightened up, makes appearance and size, spacing controls within technological requirement scope.Adopt pressurized equipment, again the fiber cloth laying of bottom is pressurizeed and is in packing state.
Ultrasonic wave working head, according to after installing as shown in Figure 2, shown in Fig. 3, takes the mode implanted to B, C region, both sides from zone line A to carry out draw point implantation to the draw point arranged.In order to improve the perpendicularity of implantation, take gradation subregion implantation, each implantation depth is 10mm.When draw point top is implanted to die head, remove one deck template, proceed draw point and implant.After draw point is implanted, one deck template is reserved at top, and inserts one deck template at bottom tip position, takes frock clamp to clamp fabric bolster, controls thickness direction size within technological requirement scope.Fabric after clamping is moved to displacement thread-changing table carrying out Z-direction fiber or fiber rod, removes frock clamp, form three dimension stereo fabric.
In above-mentioned stereo fabric preparation, ultrasonic wave implants the method for draw point, fiber cloth laying is carried out to 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, the shaping difficult problem of high thickness stereo fabric, manpower needed for operational process of craft is few, cost is low, easy to use, man-hour is few, can effectively enhance productivity, and not only the implantation of draw point Z-direction stable but also accurate.
Claims (10)
1. in a stereo fabric preparation, ultrasonic wave implants the method for draw point, it is characterized in that: utilize the ultrasonic vibration that ultrasonic equipment produces, the draw point Z-direction arranged in advance 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.
2. in stereo fabric preparation as claimed in claim 1, ultrasonic wave implants the method for draw point, it is characterized in that: described ultrasonic equipment comprises the ultrasonic generator, transducer and the ultrasonic wave working head that are linked in sequence, wherein, ultrasonic wave working head is strip and arranges straight down, and the bottom of ultrasonic wave working head is planar structure.
3. in stereo fabric preparation as claimed in claim 2, ultrasonic wave implants the method for draw point, it is characterized in that: described ultrasonic equipment also comprises support, cross slide way, linear slide block, coarse adjustment fixture and scalable adjusting rod; Described cross slide way to be located on support and to have more than two that are parallel to each other, and is provided with transiting rod between two relative cross slide waies; Transiting rod can move relative to cross slide way, to control the motion in first direction of work; Linear slide block is located on transiting rod, controls the movement in working head another one direction; Described coarse adjustment fixture arranges straight down and is connected on linear slide block; Described scalable adjusting rod arranges straight down and is connected to the bottom of coarse adjustment fixture; The bottom of described scalable adjusting rod is connected with transducer.
4. in stereo fabric preparation as claimed in claim 3, ultrasonic wave implants the method for draw point, it is characterized in that: described ultrasonic equipment also comprises chuck and lower chuck, set upper chuck is located at bottom scalable adjusting rod, described lower chuck is connected in bottom upper chuck by screw rod, described transducer is located in lower chuck, and ultrasonic wave working head is through the bottom being connected to transducer bottom lower chuck.
5. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, it is characterized in that: fiber cloth laying meets layer density requirements, before draw point is implanted, carries out pressurization in advance closely knit to fiber cloth laying; In draw point implantation process, by keeping pressurized state, Z-direction scrim cloth is made to reach a layer density requirements.
6. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, it is characterized in that: the guidance quality of draw point controls by means of template, template is layer structure, when draw point top flushes with die head, remove a top layer template, proceed draw point to implant, the like; After draw point is implanted, a reserved template at fiber cloth laying top, and the tip position bottom fiber cloth laying inserts one deck template, and take frock clamp to clamp fabric bolster, control thickness direction required size, then the fabric after clamping is moved to displacement thread-changing table carrying out Z-direction fiber or fiber rod, after replacement completion, remove frock clamp and bolster, form three dimension stereo fabric.
7. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, it is characterized in that: each implantation depth of draw point is 10mm.
8. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, it is characterized in that: draw point adopts the mode implanted to periphery by fiber cloth laying center.
9. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, it is characterized in that: the length of draw point exceeds fiber cloth laying Z-direction thickness 60mm ~ 100mm.
10. in the stereo fabric preparation as described in claim 1-4 any one, ultrasonic wave implants the method for draw point, and it is characterized in that: the frequency of ultrasonic vibration is 30kHz ~ 60kHz, amplitude is 30 μm ~ 100 μm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105922474A (en) * | 2016-05-24 | 2016-09-07 | 中材科技股份有限公司 | Ultrasonic wave automatic steel needle implanting device |
| CN107009541A (en) * | 2017-06-13 | 2017-08-04 | 西北工业大学 | The ultrasonic method for implantation of composite Z-direction enhancing |
| CN111070720A (en) * | 2019-12-31 | 2020-04-28 | 中国人民解放军国防科技大学 | Fiber position control device and method for fiber reinforced composite material |
| CN112297282A (en) * | 2020-09-29 | 2021-02-02 | 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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| US20060288553A1 (en) * | 2005-06-22 | 2006-12-28 | Hall Terence F | Automated Z-pin insertion technique using universal insertion parameters |
| 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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| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105922474A (en) * | 2016-05-24 | 2016-09-07 | 中材科技股份有限公司 | Ultrasonic wave automatic steel needle implanting device |
| 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 |
| CN107009541A (en) * | 2017-06-13 | 2017-08-04 | 西北工业大学 | The ultrasonic method for implantation of composite Z-direction enhancing |
| CN111070720A (en) * | 2019-12-31 | 2020-04-28 | 中国人民解放军国防科技大学 | Fiber position control device and method for fiber reinforced composite material |
| CN112297282A (en) * | 2020-09-29 | 2021-02-02 | 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 |
| 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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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. |