The invention belongs to manufacture technology of composite material, are related to a kind of dipping method of glass fibre one-way tape for the main blade crossbeam of paving.The step of dipping, is as follows: preparing maceration extract;The table of comparisons of glass fibre one-way tape weight after establishing the dry glass fibre one-way tape weight of each batch glass fibre feed material length and impregnating;Dipping;Pass through critical point;Sampling;Determine whether dipping is qualified.The invention proposes a kind of dipping methods of glass fibre one-way tape for the main blade crossbeam of paving, it substantially reduces since the line density fluctuation of glass fibre causes the weight and volume of preimpregnated glass fibre one-way tape line to fluctuate, the static balance off-gage phenomenon for blade occur is avoided, the compression molding qualification rate of blade is improved.
The invention belongs to manufacture technology of composite material, are related to a kind of glass fibre one-way tape for the main blade crossbeam of paving Dipping method.
Main blade is the most critical component of helicopter, and the prepreg tape crossbeam of composite material blade is the most critical of main blade Component only places the suitable prepreg tape crossbeam of volume for molding, can just produce qualified main blade.Currently, straight It is preimpregnated glass fibre one-way tape that owner's blade, which is risen, with crossbeam, and used method is that strict control gel content is ± 2% Method, that is to say, that only in control unit length preimpregnated glass fibre one-way tape shared by epoxy resin and domestic DDM curing agent Weight ratio.The disadvantage is that: since the line density of glass fibre generally has fluctuation, it is unidirectional to will cause preimpregnated glass fibre in this way Band line density maximum fluctuation reaches ± 9%, and volume fluctuation reaches ± 6%, and weight and volume big in this way fluctuation will for blade The compression molding qualification rate for influencing blade, leads to the static balance off-gage phenomenon for blade often occur.In addition, for composite material paddle For leaf manufacture, the relative dimensions between material are extremely important, if the change in size of some part is excessive, will affect The thickness of other parts, and then its index and mechanical performance for corresponding to gel content is influenced, when serious, it is possible that large area It is layered, comes unglued, be not available the blade manufactured.
The purpose of the present invention is: propose a kind of dipping method of glass fibre one-way tape for the main blade crossbeam of paving, So as to reduce due to glass fibre line density fluctuation cause the weight and volume of preimpregnated glass fibre one-way tape line to fluctuate, avoid There is the static balance off-gage phenomenon of blade, improves the compression molding qualification rate of blade.
5, determine whether dipping is qualified: as sampled data m3With theoretical calculation data m2It matches, shows that this time dipping closes Lattice;Work as m3Beyond the data value calculated in formula, the gap between epoxy resin content control deflector roll must be adjusted, step 3 is repeated To step 5, until sampled data m3With theoretical calculation data m2Until matching.
The invention has the advantages that proposing a kind of dipping side of glass fibre one-way tape for the main blade crossbeam of paving Method is substantially reduced since the line density fluctuation of glass fibre causes the weight and volume wave of preimpregnated glass fibre one-way tape line It is dynamic, the static balance off-gage phenomenon for blade occur is avoided, the compression molding qualification rate of blade is improved.
1, prepare maceration extract: maceration extract is epoxy resin (CY205) and domestic DDM curing agent (diaminodiphenylmethane) Mixture, epoxy resin are mixed with DDM with weight ratio 100/27.
2.1, determine the numerical value of unit length L: unit length L takes the integral multiple of 100mm;It is selected in this specific implementation The dry glass fibre of a batch therefrom weighs 3 sections of the exemplar weighings that length is 2m, is respectively as follows: 56.31g, 56.43g, 56.48g, Average value m1For 56.41g.
2.2, the dry glass one-way fiber band tow weight m in each weight section of unit length glass fibre is determined1, take n =9, it determines Δ m=(59.04-56.16)/9=2.88, obtains 9 row weight distribution section, as shown in the table.
3, it impregnates: the glass fibre one-way tape impregnated will be needed to be put into impregnating equipment, under the traction of pulling equipment, glass Glass one-way fiber band moves dipping in the dipping tank of impregnating equipment and moves, and the glass fibre one-way tape after dipping is contained by epoxy resin When amount control deflector roll, by the space between two deflector rolls, control stays in the weight of the maceration extract on glass fibre one-way tape.
5, sample: in impregnated glass fibre one-way tape, acquiring out 0.2m, (acquisition length of mixture is dry glass The 1/10 of fiber) 3 sections of exemplar, weigh the weight of exemplar, respectively 7.20,7.24.7.26, average value m3It is 7.23.
6, determine whether dipping is qualified: being compared by the sample weight of acquisition with calculated weight, calculated result is 7.23, final result shows that sampled data matches with theoretical calculation data, shows that this time dipping is qualified.
1.5, determine whether dipping is qualified: as sampled data m3With theoretical calculation data m2It matches, shows that this time dipping is qualified; Work as m3Beyond the data value calculated in formula, must gap between adjustment epoxy resin content control deflector roll, repeat step 1.3 to Step 1.5, until sampled data m3With theoretical calculation data m2Until matching.