CN104015406B - Embedded co-curing grid damping composite material structure and manufacturing process thereof - Google Patents
Embedded co-curing grid damping composite material structure and manufacturing process thereof Download PDFInfo
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Abstract
The invention discloses an embedded co-curing grid damping composite material structure which is characterized by comprising an upper composite material prepreg layer and a lower composite material prepreg layer, wherein a plurality of blocky damping fins with the same shape and size are bonded between the upper composite material prepreg layer and the lower composite material prepreg layer through viscous-state damping sizing materials; and the upper composite material prepreg layer, the lower composite material prepreg layer, the plurality of blocky damping fins and the composite material prepregs respectively paved on the upper part and the lower part of the upper composite material prepreg layer and the lower composite material prepreg layer are co-cured in an autoclave to form the embedded co-cured grid damping composite material component. The manufacturing process of the structure comprises eight steps of determining the damping structure, manufacturing a patch template, pressing a damping film, manufacturing a damping small piece, manufacturing viscous-state damping sizing material, adhering the damping piece, volatilizing a solvent and finally forming, and lays a foundation for the design research of the anisotropic damping structure and the wide application of the embedded co-curing grid damping composite material structure.
Description
Technical field
The present invention relates to the crossing research field of Noise and Vibration Control and functional composite material, especially a kind of embedded co-curing grid damp composite material structure and manufacture craft thereof.
Background technology
In aviation, today that space technology develops rapidly, traditional material and structure can not meet aircraft lightweight, high rigidity, the designing requirement of large damping capacity, embedded co-curing composite damping structure is at a kind of new construction with high damping vibration attenuation performance almost keeping conventional composite materials mechanical property basis proposes, that a class is by the heterogeneous complex solid of three kinds of material cured of different nature, analyze from its Nomenclature Composition and Structure of Complexes, one is wherein had to be that continuous print is called matrix substantially in layer, and another be mutually dispersion contain by matrix be called wild phase, one is also had to be isotropic visco-elastic damping material mutually.Its matrix phase, wild phase and visco-elastic damping material play coordinative role in performance, thus reach the object improving composite element damping significantly, obtain the comprehensive mechanical property that homogenous material hardly matches.This prior impedance bundary structure is embedded in matrix material inside compared with traditional damping form, have and do not come off, the advantage such as anti-aging, therefore this composite laminated damping structure has just become the Hot Contents of numerous Chinese scholars research once proposition, but the structure of this composite damping workpiece is obviously different from conventional material with making, there is strong anisotropy, the difficulty of processing and fabricating and complexity are increased greatly, therefore the manufacture craft of embedded co-curing damp composite material is one of important topic of current domestic field of compound material research.
Pressed disc method is the technique of the most basic making viscoelastic damping film.Because unvulcanized visco-elastic damping material is relatively sticky softer, difficult especially during laying, so there is the tabletting method of partial vulcanization, the visco-elastic damping material after namely adopting the compacting of the mould of heating mixing, has realized partial vulcanization in the process making film.Then the partial vulcanization damping diaphragm made is laid in material prepreg layer, completes co-curing according to curing process curve together with prepreg.Although the thickness of the viscoelastic damping film that this technique makes accurately can be controlled by compression mold, its Coating combination performance is relatively weak.
Spread coating mainly uses specific solvent---and damping material dissolves by gasoline according to a certain percentage, viscous state damping material dissolution homogeneity scrubbing brush is coated in material prepreg surface by recycling brush coating process, after solvent volatilization, damping layer thickness is measured, brush till damping layer thickness reaches designing requirement again, finally the prepreg of band damping layer is spread into wherein as the one deck in composite, and complete co-curing in autoclave.Although its Coating combination performance of embedded co-curing damp composite material that this technique makes is relatively high, the uniformity of viscoelastic damping film thickness is difficult to accurately control.
Above-mentioned two kinds of methods are only applicable to the making of the embedded co-curing composite element of continuous damping diaphragm.Development for the discontinuous grid damping structure with anisotropic is almost still blank so far.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of embedded co-curing grid damp composite material structure and manufacture craft thereof.It adopts following technical scheme:
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins become matrix form to arrange, and put into coordinate system by some block damping fins, often the center ordinate correspondent equal of row damping fin, often the abscissa correspondent equal at row damping fin center.
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; In lastrow between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent next line;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; In left column between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent right row.
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent next line between adjacent two pieces of damping fins in lastrow;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent right row between adjacent two pieces of damping fins in left column.
A kind of embedded co-curing grid damp composite material structure fabrication processes, comprising:
The first step, determines damping structure as requested, namely selects the distribution mode of damping fin, the size of design damping fin and spacing dimension according to the performance of required embedded co-curing grid damp composite material;
Second step, make paster template, the size of damping fin size, spacing and back gauge designed by step one draws out grid chart in template; The material that correspondence will be pasted damping fin position is again got rid of, and namely forms paster template;
3rd step, utilizes pressed disc method to obtain damping diaphragm;
4th step, is cut into the size of required grid damping fin by obtained damping diaphragm;
5th step, prepares viscous state damping material solution;
6th step, by the grid damping fin upper and lower surface of gained with viscous state damping material solution adheres on material prepreg;
7th step, places 12-24 hour in draughty environment, and the solvent in viscous state damping material is volatilized, if produced in enormous quantities, uses wet type heating by the solvent recovery recycling in viscous state damping material;
8th step, by the material prepreg of band grid damping fin and the material prepreg not with grid damping fin according to designing requirement order together with lay, put into autoclave and adopt co-curing reaction finally to make embedded co-curing grid damp composite material component.
The material prepreg of band grid damping fin in 8th step and the material prepreg not with grid damping fin are same prepregs, be a kind of band grid damping fin and another kind does not have grid damping fin, wherein prepreg can be glass fiber compound material prepreg also can be carbon fibre composite prepreg (using carbon fibre composite prepreg in the present invention), all can buy on the market.
Co-curing reaction condition in 8th step is identical with ZL201210030874.2 " the large damp composite material of embedded high temperature co-curing and preparation technology thereof ": the vacuum in vacuum bag is-0.099--0.097MPa, in autoclave, gas pressure is 0.4-0.6MPa, temperature will control temperature in autoclave by the solidifying requirements of used resin, and its heating rate is 0.5-3 DEG C/min; Rate of temperature fall is 1.5 ± 0.2 DEG C/min, is incubated 4-6 hour when 183-190 DEG C, 120 ± 2 DEG C time, be incubated 0-15 minute, and when in autoclave, temperature is down to 80-50 DEG C, release cools, and takes out embedded co-curing grid damp composite material goods.
In described second step, paster template to be opened by cardboard or aluminium foil is made, and the way that material template being pasted damping fin position is combined with cutter by craft steel ruler is removed.
In described 3rd step, damping diaphragm carries out on vulcanizing press, the elastomeric compound of q.s is prepared according to damping material calendering process, elastomeric compound is extruded thin slice on a mill until, compression mold is placed on preheating on vulcanizing press, arrange preheat temperature be 180 DEG C consistent with the curing temperature of viscoelastic material; Elastomeric compound thin slice is cut into rectangular, after mold temperature reaches 180 DEG C and be stable, then the elastomeric compound thin slice uniform spreading of strip is entered mould central authorities; Arranging cure time is 4min, after cure time arrives, the sizing material thin slice after partial vulcanization is taken off cooling and forms damping diaphragm.
Pressed disc method makes damping diaphragm and please refer to patent: " manufacture craft of embedded co-cured high damping composite laminates structure ", ZL201010177278.8
In the present invention, damping fin material adopts the material preparation in Chinese patent ZL201210030874.2 " the large damp composite material of embedded high temperature co-curing and preparation technology thereof ", and the composition ratio of quality and the number of copies of concrete formula is: butyl rubber 92.5-93.5 part; Chlorinated scoline 6.5-7.5 part; Haloflex 2.9-3.1 part; Zinc oxide 3.9-4.1 part; Stearic acid 0.8-1 part; Carbon black 50-52 part; Octyl phenolic 5.9-6.1 part.Employing butyl rubber, chlorinated scoline are that primary raw material makes viscoelastic material.
In described 4th step, damping diaphragm is cut into required grid damping fin, use a cross section and grid damping fin equal and opposite in direction and the rectangular tube be made up of same tool steel plate, the opening part of this rectangular tube is processed into blade-like, cut damping diaphragm with this blade, just damping diaphragm is made grid damping fin.
In described 5th step, viscous state damping sizing material makes, first by consistent with damping diaphragm component mixing complete after elastomeric compound be placed in mill and extrude 1mm thickness sheet, and elastomeric compound thin slice is cut into the wide adhesive tape of 10mm, again solvent No. 120 gasoline determining volume are poured in large beaker, the quality of required elastomeric compound thin slice adhesive tape is calculated according to mass ratio 1:5, and take with electronic balance, then be positioned in industrial naptha by the adhesive tape of the elastomeric compound taken, sealing is placed in room temperature environment to deposit and within 24 hours, makes it dissolve formation viscous state damping sizing material completely.
In described 6th step, damping fin adheres to, by the damping fin upper and lower surface viscous state damping material solution adheres of gained between upper and lower two panels material prepreg, during enforcement, first with adhesive tape or binding agent, paster template is fixed on material prepreg, but to easily take off, and do not stay remnants, position is pasted according to the damping fin that paster template determines, viscous state damping is brushed uniformly on material prepreg or/and on damping fin, and damping fin is attached on the relevant position in the grid of paster template, ensure that every sheet damping fin and correspondence position fit like a glove, and and tight between material prepreg, after posting piecewise, place 10min in draughty environment, after damping fin bonding is firm, paster template is carefully taken off, is sure not damping fin is moved, then brush viscous state damping sizing material rapidly and uniformly at the upper surface of every block damping fin, another layer of material prepreg is attached to the upper surface of damping fin, complete pasting of damping small pieces.
The invention has the beneficial effects as follows, the damping diaphragm that utilized pressed disc method to obtain, it is hot forming in a mold, its thickness can be well controlled, and by controlling its state of cure (vulcanization) of tablet forming technique state modulator, guarantee that the residue cure time of damping diaphragm is consistent with the hardening time of material prepreg.
Embedded co-curing grid damp composite material structure is a kind of damping anisotropic structure, will have the damping fin array co-curing of periodic arrangement in composite element exactly.This periodic damping fin array, by adjusting in every plate shape and area and array horizontal and vertical distance between sheet and sheet, just energy accurate adjustment embedded co-curing grid damp composite material component is each to damped coefficient, realize the accurate control of damped coefficient at different directions, the damping of composite structure accurately can be designed in different directions, and this invention will have wide practical use in many high-tech areas.
Viscous state damping material in the present invention is the transition zone between damping diaphragm and prepreg.Before co-curing, damping fin is mainly fixed on material prepreg by the effect of viscous state damping sizing material.When after the solvent volatilization in viscous state damping glue material solution, form unvulcanized transition zone, this damping layer is owing to there being the existence of a lot of unsaturated bond, cross-bond is being formed with prepreg generation chemical reaction with meeting in the process of prepreg co-curing, final formation inierpeneirating network structure (IPN), this patent implement time use material functional group between chemical reaction as shown in Figure 3.And the damping layer of the partial vulcanization that unvulcanized damping layer and compressing tablet obtain also has good affinity interaction, meeting sulfuration simultaneously in co-curing process, Small molecular in two-layer damping layer can react to each other and be cross-linked into macromolecular structure by chemical bond, and its chemical reaction as shown in Figure 4.As can be seen here, due to the existence of transition zone, compressing tablet damping layer and prepreg by the indirect combination between chemical bond, can improve the adhesion between grid damping fin and material prepreg by layer to layer transition method, thus greatly improve the mechanical property of embedded co-curing composite structure.
Accompanying drawing explanation
Fig. 1 embedded co-curing grid damping layer composite structure;
Fig. 2 damping fin distribution mode;
Fig. 3 butyl rubber and bismaleimide resin reaction principle;
Fig. 4 butyl rubber sulfuration mechanism;
The situation template of Fig. 5 paster damping;
Fig. 6 compressing tablet damping diaphragm;
Fig. 7 cuts damping fin mould;
Fig. 8 punching press makes damping fin schematic diagram;
Fig. 9 grid damping fin;
Figure 10 viscous state damping sizing material;
Figure 11 layer to layer transition method lays damping fin schematic diagram;
It is in kind that Figure 12 layer to layer transition method lays damping layer;
Figure 13 embedded co-curing grid damp composite material fabrication processing figure.
Wherein material prepreg layer, 2. block damping fin on 1., 3. descend material prepreg layer, 4. rectangular tube, 5. cutting edge, 6. viscous state damping sizing material.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention is actual solves three problems: propose several different grid damping layer structure of embedded co-curing composite, explore use layer to layer transition method to make embedded co-curing grid damping layer composite structure can performance, develop the technique of a set of making embedded co-curing grid damping layer composite structure, below in conjunction with accompanying drawing 1 to Figure 13 and embodiment, the invention will be further described.
Embedded co-curing grid damp composite material structure has different mechanical properties for its composite of embedding of different grid damping array.According to the distribution mode of grid damping fin, this structure is divided into three kinds by different the present invention: in-line arrangement formula, middle bifurcated row formula, non-middle bifurcated row formula, specifically as shown in Figure 2, if this structure is put into coordinate system, the in-line arrangement formula i.e. ordinate correspondent equal of the every row damping fin centre of form, the often abscissa correspondent equal of the row damping fin centre of form, as shown in Fig. 2 (a); Middle bifurcated row formula, horizontal stroke (indulging) the coordinate correspondent equal of the damping fin centre of form, damping fin is symmetrical about the center line of the row (column) spacing of adjacent column, as shown in Fig. 2 (b), b1=b2; Non-middle bifurcated row formula, its damping fin centre of form horizontal stroke (indulging) coordinate correspondent equal, damping fin is asymmetric about the center line of the row (column) spacing of adjacent column, as shown in Fig. 2 (c), b1 ≠ b2.When same mesh damping fin, according to different arrangement modes, the anisotropic properties of total damping is different.
Specifically can be divided into following three examples:
Embodiment 1:
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer 1 and lower material prepreg layer 3, between upper and lower material prepreg layer 1,3, be bonded with the identical block damping fin 2 of some shape sizes by viscous state damping sizing material 6; Described upper and lower material prepreg layer 1,3 and some block damping fins 2 and be layed in upper and lower material prepreg layer 1,3 upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fin 2 one-tenth matrix arrangement, put into coordinate system by some block damping fins, often the ordinate correspondent equal at the center of row damping fin, often the abscissa correspondent equal at row damping fin center.
Embodiment 2:
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer 1 and lower material prepreg layer 3, between upper and lower material prepreg layer 1,3, be bonded with the identical block damping fin 2 of some shape sizes by viscous state damping sizing material 6; Described upper and lower material prepreg layer 1,3 and some block damping fins 2 and be layed in upper and lower material prepreg layer 1,3 upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; In lastrow between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent next line;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; In left column between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent right row.
Embodiment 3:
A kind of embedded co-curing grid damp composite material structure, comprise material prepreg layer 1 and lower material prepreg layer 3, between upper and lower material prepreg layer 1,3, be bonded with the identical block damping fin 2 of some shape sizes by viscous state damping sizing material 6; Described upper and lower material prepreg layer 1,3 and some block damping fins 2 and be layed in upper and lower material prepreg layer 1,3 upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent next line between adjacent two pieces of damping fins in lastrow;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent right row between adjacent two pieces of damping fins in left column.
In manufacture craft, pressed disc method and brushing or spraying process combine by the present invention, propose to use layer to layer transition method to make embedded co-curing grid damping layer composite structure, the molecule functional group of its transition zone can react with bismaleimide resin (or epoxy resin) functional group, simultaneously can with the damping fin surface molecular generation vulcanization reaction of partial vulcanization, form inierpeneirating network structure, improve the inter-layer bonding force of pressed disc method simultaneously, overcome the problem in uneven thickness of brushing or spraying process making damping diaphragm, concrete chemical equation as shown in Figure 3 and Figure 4.
In concrete enforcement, the present invention uses the excessive method of interlayer to make the technical process of embedded co-curing grid damp composite material structure, main point of eight steps, comprising: design damping structure, make paster template, compacting damping diaphragm, make damping small pieces, viscous state damping sizing material makes, damping fin adheres to, solvent volatilization, final molding.Concrete technology parameter below in conjunction with specific embodiment and enforcement illustrates:
The first, design damping structure, select the distribution mode of damping fin according to the performance of required embedded co-curing grid damp composite material, design the size of damping fin and the size of spacing;
The second, make paster template, according to the damping structure making paster template as shown in Figure 5 of design, only make the paster template of in-line arrangement formula and middle bifurcated row formula here.Suitable material to be selected before making paster template, its material should be quality softer and not with the material of damping material, composite generation chemical reaction or physical bond, as cardboard open, aluminium foil etc.; Determine formwork integral size again, template is consistent with the size of material prepreg; Then grid chart is drawn out according to the size of the size of designed damping fin, spacing and back gauge; The material that finally correspondence will be pasted damping fin position is got rid of, and manual mould material of removing can complete with steel ruler and cutter.
Three, damping diaphragm is suppressed, pressed disc method is utilized to obtain certain thickness damping diaphragm as shown in Figure 6, here the making of damping diaphragm carries out on vulcanizing press, the determination of its cure time, curing temperature and operating pressure to guarantee damping diaphragm have the state of cure (vulcanization) being not more than 30% under and be unlikely to damping diaphragm when conjunctiva and sticky connection occurs mould, guarantee that conjunctiva is smooth and easy indeformable.During concrete enforcement, prepare the elastomeric compound of q.s according to damping material calendering process, elastomeric compound is extruded thin slice on a mill until.Mould is placed on preheating on vulcanizing press, arranging preheat temperature is 180 DEG C (this temperature is consistent with the curing temperature of cohesive material).Sizing material is cut into rectangular, after mold temperature reaches 180 DEG C and be stable, then the elastomeric compound uniform spreading of strip is entered mould central authorities.Arranging cure time is 4min, after cure time arrives, is taken off by damping diaphragm and cools.According to the curing curve of damping material at 180 DEG C, when cure time is 4min, its state of cure (vulcanization) is not more than 30%.
Four, damping small pieces are made, obtained damping diaphragm is cut into the size of required grid damping small pieces, wafer cutting die used herein as shown in Figure 7, use a cross section and grid damping fin equal and opposite in direction and the rectangular tube 4 be made up of same tool steel plate, the opening part of this rectangular tube is processed into blade-like 5, cut damping diaphragm with this blade, just damping diaphragm is made grid damping fin 2.The damping diaphragm of Fig. 6 is gone out damping fin as shown in FIG. 8 and 9.
Five, viscous state damping sizing material makes, as shown in Figure 10.First the sizing material (consistent with compressing tablet gum base ingredients) after mixing completing is placed in mill and extrudes 1mm thickness sheet, and film is cut into the wide adhesive tape of 10mm, again solvent No. 120 gasoline determining volume are poured in large beaker, the quality of required elastomeric compound is calculated according to mass ratio 1:5, and take with electronic balance, then be positioned in industrial naptha by the adhesive tape of the elastomeric compound taken, sealing is placed in room temperature environment to deposit and makes it dissolve completely in 24 hours, stirs rear and can be used for brushing.When preparing viscous state damping sizing material, for ensureing that the thickness of viscous state damping layer is much smaller than compressing tablet damping thickness, the mass concentration of solute and solvent is less than general brush coating process viscous state damping sizing material concentration used.
6th, damping fin adheres to, by the damping fin upper and lower surface viscous state damping material solution adheres of gained between upper and lower two panels material prepreg, as shown in figure 11, first with adhesive tape or other binding agent, paster template is fixed on material prepreg during enforcement, but to easily take off, and do not stay remnants, determine damping fin according to template and paste position, viscous state damping sizing material is brushed on the composite equably or/and on damping small pieces, and damping fin is attached on relevant position, ensure that every sheet damping block and correspondence position fit like a glove, and and there is no space between composite.After posting piecewise, place 10min in draughty environment, after damping fin bonding is firm, paster template is carefully taken off, is sure not damping fin is moved.Then brush viscous state damping sizing material quickly and evenly at the upper surface of every sheet damping block, another layer of material prepreg is attached to the upper surface of damping fin, complete pasting of damping small pieces.Figure 12 is the grid damping layer material object produced by layer to layer transition method.
The semi-finished product that 6th step is made are placed in draughty environment and place 12-24 hour, the solvent in viscous state damping material vapored away, wants Fire Hazard Area in solvent volatilization process by seven, solvent volatilization.If produced in enormous quantities, wet type also can be used to heat the solvent recovery recycling in viscous state damping material.
Eight, final molding, by the material prepreg of band grid damping fin and the material prepreg not with grid damping fin according to designing requirement order together with lay, put into autoclave, finally make embedded co-curing grid damp composite material component according to the curing process curve of material prepreg.In co-curing process, butyl rubber and resin generation chemical reaction form cross-bond, and butyl rubber sulfidation small molecular is cross-linked to form macromolecular structure, its reaction principle reaction equation as shown in Figure 3 and Figure 4.
The present invention's damping diaphragm that utilized pressed disc method to obtain, it is hot forming in a mold, its thickness can be well controlled, and by controlling its state of cure (vulcanization) of tablet forming technique state modulator, guarantee that the residue cure time of damping diaphragm is consistent with the hardening time of material prepreg, improve the adhesion between grid damping fin and material prepreg by layer to layer transition method, thus substantially improve the mechanical property of embedded co-curing grid damp composite material structure.The technological process of whole enforcement is see Figure 13.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. an embedded co-curing grid damp composite material structure, it is characterized in that, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins become matrix arrangement, put into coordinate system by some block damping fins, often the ordinate correspondent equal at the center of row damping fin, often the abscissa correspondent equal at row damping fin center.
2. an embedded co-curing grid damp composite material structure, it is characterized in that, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; In lastrow between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent next line;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; In left column between adjacent two pieces of damping fins the middle separated time in gap right through separated time in one piece of damping fin corresponding in adjacent right row.
3. an embedded co-curing grid damp composite material structure, it is characterized in that, comprise material prepreg layer and lower material prepreg layer, between upper and lower material prepreg layer, be bonded with the identical block damping fin of some shape sizes by viscous state damping sizing material; Described upper and lower material prepreg layer and some block damping fins and be layed in upper and lower material prepreg layer upper and lower respectively material prepreg jointly in autoclave co-curing form embedded co-curing grid damp composite material component;
Described some block damping fins are that neat row or column is placed, and in a coordinate system, the center abscissa of two pieces of damping fins corresponding up and down in adjacent lines is unequal, but the center abscissa of two pieces of damping fins corresponding up and down in alternate row is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent next line between adjacent two pieces of damping fins in lastrow;
Or the center abscissa of two pieces of damping fins that left and right is corresponding is unequal in adjacent column, but in alternate row, the center abscissa of two pieces of damping fins that left and right is corresponding is equal; The middle separated time sequence of one piece of damping fin that the middle separated time in gap is corresponding with adjacent right row between adjacent two pieces of damping fins in left column.
4. the manufacture craft of embedded co-curing grid damp composite material structure according to any one of claim 1-3, is characterized in that, comprising:
The first step, determines damping structure as requested, namely selects the distribution mode of damping fin according to the performance of required embedded co-curing grid damp composite material, designs the size of damping fin and the size of spacing;
Second step, make paster template, the size of damping fin size, spacing and back gauge designed by the first step draws out grid chart in template; The material that correspondence will be pasted damping fin position is again got rid of, and namely forms paster template;
3rd step, utilizes pressed disc method to obtain damping diaphragm;
4th step, is cut into the size of required damping fin by obtained damping diaphragm;
5th step, prepares viscous state damping material solution;
6th step, by the damping fin upper and lower surface of gained with viscous state damping material solution adheres on material prepreg;
7th step, places 12-24 hour in draughty environment, and the solvent in viscous state damping material is volatilized, if produced in enormous quantities, uses wet type heating by the solvent recovery recycling in viscous state damping material;
8th step, by the material prepreg of band grid damping fin and the material prepreg not with grid damping fin according to designing requirement order together with lay, put into autoclave and adopt co-curing reaction finally to make embedded co-curing grid damp composite material component.
5. technique as claimed in claim 4, it is characterized in that, in described second step, paster template is that cardboard is opened or aluminium foil, and the way that material template being pasted damping fin position is combined with cutter by craft steel ruler is removed.
6. technique as claimed in claim 4, it is characterized in that, in described 3rd step, damping diaphragm carries out on vulcanizing press, the elastomeric compound of q.s is prepared according to damping material calendering process, elastomeric compound is extruded thin slice on a mill until, compression mold is placed on preheating on vulcanizing press, arrange preheat temperature be 180 DEG C consistent with the curing temperature of viscoelastic material; Elastomeric compound thin slice is cut into rectangular, after mold temperature reaches 180 DEG C and be stable, then the elastomeric compound thin slice uniform spreading of strip is entered mould central authorities; Arranging cure time is 4min, after cure time arrives, the sizing material thin slice after partial vulcanization is taken off cooling and forms damping diaphragm.
7. technique as claimed in claim 4, it is characterized in that, in described 4th step, damping diaphragm is cut into required grid damping fin, use a cross section and grid damping fin equal and opposite in direction and the rectangular tube be made up of same tool steel plate, the opening part of this rectangular tube is processed into blade-like, cuts damping diaphragm with this blade, just damping diaphragm has been made grid damping fin.
8. technique as claimed in claim 4, it is characterized in that, in described 5th step, viscous state damping sizing material makes, first by consistent with damping diaphragm component mixing complete after elastomeric compound be placed in mill and extrude 1mm thickness sheet, and elastomeric compound thin slice is cut into the wide adhesive tape of 10mm, again solvent No. 120 gasoline determining volume are poured in large beaker, the quality of required elastomeric compound thin slice adhesive tape is calculated according to mass ratio 1:5, and take with electronic balance, then the adhesive tape of the elastomeric compound taken is positioned in industrial naptha, sealing is placed in room temperature environment to deposit and within 24 hours, makes it dissolve formation viscous state damping sizing material completely.
9. technique as claimed in claim 4, it is characterized in that, in described 6th step, damping fin adheres to, by the damping fin upper and lower surface viscous state damping material solution adheres of gained between upper and lower two panels material prepreg, during enforcement, first with adhesive tape or binding agent, paster template is fixed on material prepreg, but to easily take off, and do not stay remnants, what determine damping fin according to paster template pastes position, by even for viscous state damping scrubbing brush on material prepreg or/and on damping fin, and damping fin is attached on the relevant position in the grid of paster template, ensure that every sheet damping fin and correspondence position fit like a glove, and and tight between material prepreg, after posting piecewise, place 10min in draughty environment, after damping fin bonding is firm, paster template is carefully taken off, is sure not damping fin is moved, then brush viscous state damping sizing material quickly and evenly at the upper surface of every sheet damping fin, another layer of material prepreg is attached to the upper surface of damping fin, complete pasting of damping small pieces, finally by the material prepreg of band grid damping fin and the material prepreg not with grid damping fin according to designing requirement order together with lay, put into autoclave and adopt co-curing reaction finally to make embedded co-curing grid damp composite material component.
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| CN108162509A (en) * | 2017-12-27 | 2018-06-15 | 中国人民解放军海军工程大学 | A kind of active temperature control variable damping sandwich and variable damper control method |
| DK3793819T3 (en) | 2018-05-17 | 2023-11-27 | Avery Dennison Corp | Multi-layer cushioning laminate with partial coverage |
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