CN101348012A

CN101348012A - Opening reinforcement method and reinforcement sheet of fiber reinforcement resin composite material member

Info

Publication number: CN101348012A
Application number: CNA2008101370320A
Authority: CN
Inventors: 陈辉; 林再文; 路明坤; 梁岩; 刘永琪; 王明寅; 石建军
Original assignee: HARBIN FRP INSTITUTE
Current assignee: HARBIN FRP INSTITUTE
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2009-01-21
Anticipated expiration: 2028-08-29
Also published as: CN101348012B

Abstract

The invention discloses an opening reinforcement method and a reinforcement sheet of components of fiber-reinforced resin composites and relates to an opening reinforcement method and a reinforcement sheet used in the method. The invention solves the problems of the present reinforcement method such as difficult quality control, excessive subsequent working procedures, long time of occupying forming molds, and low working efficiency. The main steps of the method are as follows: preparing the reinforcement sheet; laying a fibrous presoaked band and the reinforcement sheet on a core mold for preparing the components of the fiber-strengthening resin composites and compacting fibrous presoaked band and the reinforcement sheet. The reinforcement sheet is annular with the thickness L2 of 2 to 4mm. The implementation of the reinforcement with the method can realize parallel production of a reinforcement section and composite bodies as well as the assembly type production of laying the composites, greatly improve the turnover utilization ratio of the mold, increase work efficiency, shorten the product molding cycle and lower the requirements of application periods of the resin body.

Description

The reinforcement for openings method and the reinforcing chip of fiber-resin composite member

Technical field

The present invention relates to be used for the reinforcement for openings method and the used reinforcing chip of this method of fiber-resin composite member.

Background technology

Composite material structural member has been widely used in the structural member of products such as Aeronautics and Astronautics, because of it has high specific strength, high specific stiffness, good vibration damping, endurance, advantage such as anticorrosive, uses increasingly extensive.For install instruments, needs such as weight reduction, usually need be in member upper shed (perforate), and opening is generally bigger, can account for more than 50% of surface area, this opening is not as carrying out reinforcement, because bigger at edge of opening stress, structure bearing capacity can reduce greatly, so must carry out carrying out local reinforcement near the opening.Existing reinforcement has two kinds: after a kind of method is first moulding parts (member), and then opening, rivet reinforcement at edge of opening with materials such as metals behind the opening, such shortcoming is that part is many, operation is many, the quality assurance difficulty, reliability of structure is low; Another kind method is that the composite body is with the moulding of reinforcement zone, can save follow-up manufacturing procedure like this, if but the reinforcement district is very thick, carry out the lay in reinforcement district at the scene by individual layer (every layer of fiber preimpregnation band is about 0.15mm), the lay time can be very long, and the quality of product is wayward, and the opening reinforcement part bit manipulation time is long, the mould holding time is long, influences the quality and the efficient of product.

Summary of the invention

The present invention exists in order to solve existing reinforcement that quality is wayward, the following process operation is many, takies long, ineffective problem of mould time, and then a kind of reinforcement for openings method and reinforcing chip of fiber-resin composite member are provided.

The present invention solves the problems of the technologies described above the technical scheme of taking to be: reinforcement of the present invention is to realize according to following steps: step 1, preparation reinforcing chip: the geometry and the size that design reinforcing chip according to the perforate size of fiber-resin composite member, geometry and size according to the reinforcing chip that designs prepare the reinforcing chip mould, lay down fibre preimpregnation band and carry out compaction treatment and promptly get required reinforcing chip on mould; Step 2, lay thickness L1 is 1.5～3mm fiber preimpregnation band on the core of preparation fiber-resin composite member; Behind step 3, the completing steps two, lay reinforcing chip, described reinforcing chip are enclosed within on the boss of core; Step 4, repetitive operation step 2 and step 3, and repave at last that to put thickness L1 be 1.5～3mm fiber preimpregnation band, the thickness T 1 that makes described fiber-resin composite member bodies is that 4.5～9mm, reinforcement thickness T 2 are 4～8mm; Step 5, outer die casing is contained on the core of the good fiber preimpregnation band of lay, curing molding after the fiber preimpregnation band compacting between external mold and the core.Described reinforcing chip is a ring-type, and the thickness L2 of described reinforcing chip is 2～4mm.

The present invention has following beneficial effect: implement reinforcement by the inventive method, can make the parallel production of reinforcement district and composite body, realize the assembled production of composite material laying, increase substantially the turnover utilization rate of mould, improved operating efficiency greatly, shorten the formed product cycle, reduce requirement working life of bulk resin.Improve the cutting performance in reinforcement district, thereby improved the whole mechanical property of structure.The reinforcing chip of moulding is by being extrusion forming separately, each individual layer of reinforcing chip (every layer is about 0.15mm) is arranged closely, reinforcing chip geometric accuracy height, the reinforcing chip of moulding can realize that circumferential zero degree is Wrapping formed separately, can increase substantially the circumferential rigidity of fiber-resin composite member perforate, and other forming method can't be realized the lay of this angle.In addition, the reinforcing chip of independent moulding can be formulated corresponding inspection procedure quality such as reinforcing chip apparent thickness are tested, and improves the q﹠r of product greatly.The assembled moulding is carried out in the production that can walk abreast of the required fiber preimpregnation band of reinforcing chip and body at last, reaches reinforcement and the moulding of body one co-curing, reduces the following process operation, enhances product performance.The shape of reinforcing chip is arbitrarily, and the angle of reinforcing chip also can be programmable arbitrarily.

Description of drawings

Fig. 1 is the front view of core of the present invention, Fig. 2 is the B-B profile of Fig. 1, Fig. 3 is the C-C profile of Fig. 1, Fig. 4 is the structural representation at core lay down fibre preimpregnation band and reinforcing chip, Fig. 5 is the plane outspread drawing with the fiber-resin composite member that has perforate (referring to deployable member) of this method making, Fig. 6 is the A-A profile of Fig. 5, and Fig. 7 is the structural representation of reinforcing chip, and Fig. 8 is the left cutaway view of Fig. 7.

The specific embodiment

The specific embodiment one: shown in Fig. 1～8, the reinforcement for openings method of the described fiber-resin composite member of present embodiment realizes according to following steps: step 1, preparation reinforcing chip: the geometry and the size that design reinforcing chip according to the perforate size of fiber-resin composite member, geometry and size according to the reinforcing chip that designs prepare the reinforcing chip mould, lay down fibre preimpregnation band and carry out compaction treatment and promptly get required reinforcing chip on mould; Step 2, lay thickness L1 is 1.5～3mm fiber preimpregnation band (thickness in monolayer of fiber preimpregnation band is 0.15mm, so need lay 10～20 layers) on the core 5 of preparation fiber-resin composite member; Behind step 3, the completing steps two, lay reinforcing chip 3, described reinforcing chip are enclosed within on the boss 5-1 of core 5; Step 4, repetitive operation step 2 and step 3, and repave at last that to put thickness L1 be 1.5～3mm fiber preimpregnation band, the thickness T 1 that makes described fiber-resin composite member bodies is that 4.5～9mm, reinforcement thickness T 2 are 4～8mm; Step 5, outer die casing is contained on the core 5 of the good fiber preimpregnation band of lay,, promptly gets the fiber-resin composite member 1 that has perforate 2 after the demoulding curing molding after the fiber preimpregnation band compacting between external mold and the core 5.The described core 5 of present embodiment, external mold are prior art.Described reinforcing chip 3 dimensions does not according to actual needs wait.

The described fiber preimpregnation of present embodiment band is made of reinforcing material and matrix, described reinforcing material is that wherein one or more of glass fibre, carbon fiber or aramid fiber mix, matrix is meant glue, described glue be by epoxy resin (or mylar) and arylamine solidified agent, imidazoles promoter by weight 1: (0.4～0.5): the ratio of (0.05～0.01) is mixed and made into; Above-mentioned glue is made pellicle, unidirectional fibre (glass fibre, carbon fiber or aramid fiber wherein one or more) is laid in makes unidirectional carbon fiber dimension preimpregnation band on the pellicle again.In order more effectively to improve the axial rigidity of member, the lay direction of fiber is very near axial direction.Consider the globality of member and the problem of member bodies opening, reality adopted 0 ° (machine direction is with axially consistent), ± 45 ° of (machine direction with axially angulation be ± 45 °) unidirectional fibre preimpregnation band laies add carbon fiber ring to the method shaped component of winding etc.

The angle of reinforcing chip can realize comprising the arbitrarily angled of pure hoop, to certain thickness, carries out compaction treatment at lay, and compaction treatment can effectively reduce the porosity of reinforcing chip, guarantees the lay position of each individual layer in the layer of reinforcing chip shop.Lay separates reinforcing chip after finishing with the reinforcing chip model, the specialized package of packing into is stand-by.Position in that the composite body need carry out reinforcement adds reinforcing chip 3 successively.The shop layer of reinforcing chip and composite body is alternately placed, to improve the cutting performance in reinforcement zone.After treating that all over products is finished, reinforcing chip is cured moulding with body, reaches the integrated purpose of opening reinforcement and body.

The specific embodiment two: shown in Fig. 6～8, the described reinforcing chip of present embodiment is a ring-type, and the thickness L2 of described reinforcing chip is 2～4mm.

The specific embodiment three: the described reinforcing chip of present embodiment is that fiber axis is to the winding-type reinforcing chip.The reinforcing chip of moulding can realize that circumferential zero degree is Wrapping formed separately, can increase substantially the circumferential rigidity of fiber-resin composite member perforate, and other forming method can't be realized the lay of this angle.Other composition and annexation are identical with the specific embodiment two.

Claims

1, a kind of reinforcement for openings method of fiber-resin composite member, it is characterized in that: described reinforcement is realized according to following steps: step 1, preparation reinforcing chip: the geometry and the size that design reinforcing chip according to the perforate size of fiber-resin composite member, geometry and size according to the reinforcing chip that designs prepare the reinforcing chip mould, lay down fibre preimpregnation band and carry out compaction treatment and promptly get required reinforcing chip on mould; Step 2, to go up lay thickness L1 at the core (5) of preparation fiber-resin composite member be 1.5～3mm fiber preimpregnation band; Behind step 3, the completing steps two, lay reinforcing chip, described reinforcing chip are enclosed within on the boss (5-1) of core (5); Step 4, repetitive operation step 2 and step 3, and repave at last that to put thickness L1 be 1.5～3mm fiber preimpregnation band, the thickness T 1 that makes described fiber-resin composite member bodies is that 4.5～9mm, reinforcement thickness T 2 are 4～8mm; Step 5, outer die casing is contained on the core (5) of the good fiber preimpregnation band of lay, curing molding after the fiber preimpregnation band compacting between external mold and the core (5).

2, the reinforcing chip in the described reinforcement of realization claim 1, it is characterized in that: described reinforcing chip is a ring-type, the thickness L2 of described reinforcing chip is 2～4mm.

3, reinforcing chip according to claim 2 is characterized in that: described reinforcing chip is that fiber axis is to the winding-type reinforcing chip.