1. A composite material integral quick connection process for a light sport airplane is characterized in that: the hand lay-up forming process comprises a hand lay-up forming process, a vacuum bag auxiliary resin injection forming process, vacuum bag pressing forming and compression molding forming process, and comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, using a brush, a roller brush or a plastic scraper to press and stack the fiber cloth, so that the fiber cloth is evenly dipped in the glue and bubbles are discharged;

s4, cutting the fiber cloth soaked with the resin according to the template, putting the fiber cloth into a mould, and sequentially coating the resin mixture and paving other fiber fabrics;

s5, placing the molded product into a mold, curing the molded product at room temperature, demolding the molded product and trimming the molded product;

the vacuum bag assisted resin injection molding process comprises the following steps:

s1, firstly, fixing the position of the fiber cloth by using self-spraying glue;

s2, laying layers according to the requirements of a drawing, then carrying out a vacuumizing procedure, evacuating bubbles in the part, then connecting a quantitative mixture of resin and a curing agent, connecting a mold at the other end, still connecting a vacuum system at one end until the resin mixture flows out from the other end and no bubbles are generated, cutting off pipelines at two ends of the resin injection and vacuum system, and then curing at room temperature;

s3, obtaining a part with a very smooth contact surface with the die after demolding, and then trimming;

the vacuum bag pressing forming method comprises the following steps:

s1, fixing the vacuum bag material on the hand-pasted product by using a porous film, a suction adhesive tape and a rubber sealant, and performing a vacuumizing procedure;

s2, after the part is solidified at normal temperature, demoulding, and then trimming the appearance;

the compression molding process comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, laying fiber cloth soaked in epoxy resin on the upper surface of the mould, and expelling bubbles on the bonding surface of the fiber cloth layer;

s4, pressurizing the die after die assembly to enable the redundant resin and bubbles to flow out, and then curing at room temperature; and after curing is finished, demolding and trimming.

2. The process of claim 1 for the integral quick connection of composite materials for light sports aircraft, characterized in that: the room temperature is controlled between 15 and 30 ℃.

3. The process of claim 1 for the integral quick connection of composite materials for light sports aircraft, characterized in that: the vacuum bag auxiliary resin injection molding process adopts locking pliers to cut off when pipelines at two ends of a resin injection system and a vacuum system are cut off.

4. The process of claim 2 for the integral quick connection of composite materials for light sports aircraft, characterized in that: the vacuum bag assisted resin infusion molding process requires that the resin infusion and vacuum system end lines be closed prior to cutting the resin infusion and vacuum system end lines.

5. The process of claim 1 for the integral quick connection of composite materials for light sports aircraft, characterized in that: and in the compression molding process, a compression mode for compressing the mold adopts a threaded clamp for clamping.

6. The process of claim 1 for the integral quick connection of composite materials for light sports aircraft, characterized in that: the mould of the compression molding process is an upper mould and a lower mould.

Background

As is well known, the shark aircraft has an extremely cool streamline in appearance design, applies shark bionics, and has excellent pneumatic performance.

However, the shark aircraft of today uses a number of metal materials which are heavy, susceptible to corrosion and to metal fatigue strength and metal crack propagation.

The shark aircraft of today has been processed gradually with composite materials, which are lighter than metal, not prone to corrosion, not affected by metal fatigue and metal crack propagation, very smooth, composite curved composite aerodynamic components that can reduce drag, enabling the aircraft to achieve excellent performance. The shark aircraft has excellent pneumatic performance due to the use of a shark bionic design of a complete machine composite material structure, can reach 333km/h in diving, keeps the maximum flight record of the same type of aircraft, and has the problems that the connection is unstable and the like easily in the existing connection process conforming to materials.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a composite material integral quick connection process for a light sport airplane.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a composite material integral quick connection process for a light sport airplane comprises a hand lay-up forming process, a vacuum bag auxiliary resin injection forming process, a vacuum bag pressing method forming process and a compression molding forming process, wherein the hand lay-up forming process comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, using a brush, a roller brush or a plastic scraper to press and stack the fiber cloth, so that the fiber cloth is evenly dipped in the glue and bubbles are discharged;

s4, cutting the fiber cloth soaked with the resin according to the template, putting the fiber cloth into a mould, and sequentially coating the resin mixture and paving other fiber fabrics;

s5, placing the molded product into a mold, curing the molded product at room temperature, demolding the molded product and trimming the molded product;

the vacuum bag assisted resin injection molding process comprises the following steps:

s1, firstly, fixing the position of the fiber cloth by using self-spraying glue;

s2, laying layers according to the requirements of a drawing, then carrying out a vacuumizing procedure, evacuating bubbles in the part, then connecting a quantitative mixture of resin and a curing agent, connecting a mold at the other end, still connecting a vacuum system at one end until the resin mixture flows out from the other end and no bubbles are generated, cutting off pipelines at two ends of the resin injection and vacuum system, and then curing at room temperature;

s3, obtaining a part with a very smooth contact surface with the die after demolding, and then trimming;

the vacuum bag pressing forming method comprises the following steps:

s1, fixing the vacuum bag material on the hand-pasted product by using a porous film, a suction adhesive tape and a rubber sealant, and performing a vacuumizing procedure;

s2, after the part is solidified at normal temperature, demoulding, and then trimming the appearance;

the compression molding process comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, laying fiber cloth soaked in epoxy resin on the upper surface of the mould, and expelling bubbles on the bonding surface of the fiber cloth layer;

s4, pressurizing the die after die assembly to enable the redundant resin and bubbles to flow out, and then curing at room temperature; and after curing is finished, demolding and trimming.

In order to increase the curing effect, the improvement of the invention is that the room temperature is controlled between 15 and 30 ℃.

In order to facilitate cutting, the invention improves that the vacuum bag assists the resin injection molding process to cut off by using a locking pliers when pipelines at two ends of a resin injection and vacuum system are cut off.

In order to prevent air from entering the pipes when the pipes are cut off, the improvement of the invention is that the vacuum bag-assisted resin injection molding process needs to close the pipes at two ends of the resin injection and vacuum system before the pipes at two ends of the resin injection and vacuum system are cut off.

In order to make the pressurization of the die more convenient and simultaneously conveniently adjust the pressurization strength, the improvement of the invention is that a threaded clamp is adopted for clamping in a pressurization mode for pressurizing the die in the compression molding process.

In order to facilitate demoulding and make redundant bubbles flow out more easily, the invention improves that the mould of the compression molding process is an upper mould and a lower mould.

(III) advantageous effects

Compared with the prior art, the invention provides a composite material integral quick connection process for a light sport airplane, which has the following beneficial effects:

according to the overall quick connection process for the composite material of the light-weight moving aircraft, different connection processes are adopted in different areas of the shark aircraft, so that the shark aircraft is more stable and reliable in connection, and the connection stability is improved.

Drawings

FIG. 1 is a schematic diagram of the process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the invention relates to a composite material integral fast connection process for a light sport aircraft, which comprises a hand lay-up forming process, a vacuum bag auxiliary resin injection forming process, a vacuum bag pressing forming process and a compression molding forming process, wherein the surface of a part manufactured by the vacuum bag auxiliary resin injection forming process and a mould combined is very smooth without small pores, and the vacuum bag auxiliary resin injection forming process is suitable for a seat of a shark aircraft, an engine fairing and the like, the vacuum bag pressing forming process is more suitable for forming a fuselage, a wing, a flight control surface and the like of the shark aircraft by adopting the process, the compression molding forming process is more suitable for small parts with requirements on surface smoothness, the shark aircraft adopts a simple compression molding forming process, and different connection processes are adopted in different areas of the shark aircraft, so that the connection of the shark aircraft is more stable and reliable, and the connection stability is improved, the hand lay-up forming process comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, using a brush, a roller brush or a plastic scraper to press and stack the fiber cloth, so that the fiber cloth is evenly dipped in the glue and bubbles are discharged;

s4, cutting the fiber cloth soaked with the resin according to the template, putting the fiber cloth into a mould, and sequentially coating the resin mixture and paving other fiber fabrics;

s5, placing the molded product into a mold, curing the molded product at room temperature, demolding the molded product and trimming the molded product;

the vacuum bag assisted resin injection molding process comprises the following steps:

s1, firstly, fixing the position of the fiber cloth by using self-spraying glue;

s2, laying layers according to the requirements of a drawing, then carrying out a vacuumizing procedure, evacuating bubbles in the part, then connecting a quantitative mixture of resin and a curing agent, connecting a mold at the other end, still connecting a vacuum system at one end until the resin mixture flows out from the other end and no bubbles are generated, cutting off pipelines at two ends of the resin injection and vacuum system, and then curing at room temperature;

s3, obtaining a part with a very smooth contact surface with the die after demolding, and then trimming;

the vacuum bag pressing forming method comprises the following steps:

s1, fixing the vacuum bag material on the hand-pasted product by using a porous film, a suction adhesive tape and a rubber sealant, and performing a vacuumizing procedure;

s2, after the part is solidified at normal temperature, demoulding, and then trimming the appearance;

the compression molding process comprises the following steps:

s1, firstly, paving a fiber fabric cut according to a drawing on a workbench;

s2, brushing an epoxy resin mixture;

s3, laying fiber cloth soaked in epoxy resin on the upper surface of the mould, and expelling bubbles on the bonding surface of the fiber cloth layer;

s4, pressurizing the die after die assembly to enable the redundant resin and bubbles to flow out, and then curing at room temperature; and after curing is finished, demolding and trimming.

It should be further explained that the room temperature is controlled between 15 and 30 degrees, the curing effect is increased, the vacuum bag assisted resin injection molding process is cut off by using a locking pliers when the pipelines at the two ends of the resin injection and vacuum systems are cut off, the vacuum bag assisted resin injection molding process is convenient to cut off, the pipelines at the two ends of the resin injection and vacuum systems need to be closed before the pipelines at the two ends of the resin injection and vacuum systems are cut off, air is prevented from entering the pipelines when the pipelines are cut off, the pressurizing mode of pressurizing the mold in the compression molding process is realized by clamping the mold through a threaded clamp, the pressurization of the mold is more convenient, the pressurizing strength is conveniently adjusted, the mold in the compression molding process is an upper mold and a lower mold, the demolding is more convenient, and meanwhile, redundant bubbles are easier to flow out.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.