CN111231373A

CN111231373A - Forming die and method for preparing intelligent skin composite material

Info

Publication number: CN111231373A
Application number: CN201911402232.9A
Authority: CN
Inventors: 王飞
Original assignee: Cetc Wuhu General Aviation Industry Technology Research Institute Co ltd; Cetc Wuhu Diamond Aircraft Manufacture Co ltd
Current assignee: Cetc Wuhu General Aviation Industry Technology Research Institute Co ltd; Cetc Wuhu Diamond Aircraft Manufacture Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-06-05

Abstract

The invention discloses a forming die and a method for preparing an intelligent skin composite material. According to the invention, a special forming die is designed according to the structure and the size of the intelligent skin, and the required skin structure can be manufactured through the die, so that the thermal deformation risk of the intelligent skin in the forming process can be effectively reduced, and the intelligent skin is ensured to have excellent size precision and stability.

Description

Forming die and method for preparing intelligent skin composite material

Technical Field

The invention belongs to the field of auxiliary parts of airplanes, and particularly relates to a forming die and a method for preparing an intelligent skin composite material.

Background

The smart skin is part of the sensor aircraft structure and is the key structure to carry the flight sensors. The sensor aircraft breaks through the design idea of separation of a sensor and a structure in the design of a traditional aircraft, combines the sensor (such as a radar, a large antenna, a detection element, a micro-processing element, a driving element and other functional parts) into an aircraft structure, and integrates the sensor and the aircraft structure into a whole by innovative structural design and utilizing advanced composite materials and forming technology thereof, thereby reducing the aerodynamic resistance and flight weight of the aircraft and improving the comprehensive performance of the aircraft.

The intelligent skin is a laminated structure, materials between layers are different, and coordination of hole positions and relative positions between layers is critical, so that a mold needs to be designed, the structure that the thermal expansion coefficient matching of a mold material and a skin material is good, and the hole position positioning is accurate can be fully considered.

Disclosure of Invention

The invention aims to provide a forming die and a method for preparing an intelligent skin composite material, which can ensure the dimensional accuracy and stability of an intelligent skin.

The technical solution for realizing the purpose of the invention is as follows:

the utility model provides an intelligence covering combined material forming die, includes metal framework, a plurality of plank, combined material profiled surface, first baffle and second baffle, metal framework includes horizontal skeleton and a plurality of vertical skeleton, a plurality of vertical skeletons set up perpendicularly in proper order in on the horizontal skeleton, be provided with a plank between the top of per two vertical skeletons, the combined material profiled surface lay in the upper portion of plank, first baffle fixed set up in one side of combined material profiled surface, the second baffle is fixed set up in the opposite side of combined material profiled surface.

Further, the mould still includes and sets up in a plurality of wheels of horizontal skeleton both sides.

Furthermore, four wheels are respectively arranged on two sides of the horizontal framework.

Furthermore, four corners of the die are respectively provided with a positioning hole.

Further, the metal framework is a steel framework.

Further, the lengths of the plurality of vertical backbones are not exactly the same.

Further, the first baffle and the second baffle are both long strips.

A preparation method of the intelligent skin composite material adopting the intelligent skin composite material forming die comprises the following steps:

the method comprises the following steps: paving and sticking an inner skin and inner-layer foam on the molding surface of the composite material, and bonding a reflecting surface after curing;

step two: positioning and bonding the middle-layer foam and the antenna unit by using the first baffle and the second baffle;

step three: and paving and attaching outer-layer foam and an outer skin.

Further, the inner skin is a carbon fiber layer, and the outer skin is a glass fiber layer.

Furthermore, the through hole for installing the electric connector on the intelligent skin composite material is subjected to numerical control machining by finding a reference through the positioning hole on the die.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, a special forming die is designed according to the structure and the size of the intelligent skin, the required skin structure can be manufactured through the die, the die is simple in structure, the manufacturing process is simple, convenient and accurate, the thermal deformation risk in the forming process of the intelligent skin can be effectively reduced, and the intelligent skin is ensured to have excellent size precision and stability.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

FIG. 1 is a front view of a smart skin composite forming mold of the present invention.

FIG. 2 is a top view of the smart skin composite forming mold of the present invention.

Fig. 3 is a longitudinal sectional view of the smart skin composite material molding die of the present invention.

Fig. 4 is a schematic structural diagram of a smart skin formed by using a smart skin composite material forming die.

Detailed Description

In order to better understand the technical content of the invention, specific embodiments are specifically illustrated in the following description in conjunction with the accompanying drawings.

As shown in fig. 1-3, an intelligence covering combined material forming die, includes metal framework 1, a plurality of plank 2, combined material profiled surface 3, first baffle 4 and second baffle 5, metal framework 1 includes horizontal skeleton 1-1 and a plurality of vertical skeleton 1-2, a plurality of vertical skeleton 1-2 set up perpendicularly in proper order in on horizontal skeleton 1-1, be provided with a plank 2 between per two vertical skeleton 1-2's the top, combined material profiled surface 3 lays in the upper portion of plank 2, first baffle 4 fixed set up in one side of combined material profiled surface 3, second baffle 5 fixed set up in the opposite side of combined material profiled surface 3.

Preferably, the mold further comprises a plurality of wheels 6 disposed at both sides of the horizontal frame 1-1.

Preferably, four wheels 6 are arranged on each side of the horizontal framework 1-1.

Preferably, the four corners of the mold are respectively provided with a positioning hole 7.

Preferably, the metal skeleton 1 is a steel skeleton.

Preferably, the lengths of the plurality of vertical skeletons 1-2 are not completely the same.

Preferably, the first baffle 4 and the second baffle 5 are both elongated.

The manufacturing process of the die comprises the following steps:

cutting a rectangular steel pipe into specified dimensions according to requirements, welding the rectangular steel pipe into a metal framework 1 according to structural requirements, connecting a wood board 2 with the metal framework 1 on the metal framework 1 by using rivets to form a wood board primary molded surface, scraping the mixed substitute wood onto the wood board 2 on the wood board primary molded surface, putting the mixed substitute wood into a curing furnace, heating to a certain temperature, and curing. And (3) processing the substitute wood to a specified size by adopting a numerical control machine tool according to the inner profile of the intelligent mask to form a composite material molding surface 3. Adopt unified benchmark, bore 4 locating holes on the mould with the digit control machine tool to and baffle bolt hole. After the baffle is processed, the baffle is connected with the die through a bolt. And finally, welding a wheel mounting plate and mounting the wheel.

The intelligent skin molded by the mold of the invention is shown in fig. 4, and the molding process comprises the following steps:

the method comprises the steps of firstly paving a carbon fiber layer (namely an inner skin) and an inner layer foam on a composite material forming surface 3, bonding a reflecting surface after curing, positioning and bonding the middle layer foam and an antenna unit by using a baffle, and finally paving an outer layer foam and a glass fiber layer (namely an outer skin). And a through hole for installing the electric connector on the skin is subjected to numerical control machining by finding a reference through a positioning hole 7 on the die.

Various modifications and alterations of this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent skin composite material forming die is characterized by comprising a metal framework (1), a plurality of wood boards (2), a composite material forming surface (3), a first baffle (4) and a second baffle (5), the metal framework (1) comprises a horizontal framework (1-1) and a plurality of vertical frameworks (1-2), the vertical frameworks (1-2) are sequentially and vertically arranged on the horizontal framework (1-1), a wood board (2) is arranged between the top ends of every two vertical frameworks (1-2), the composite material molding surface (3) is laid on the upper part of the wood board (2), the first baffle (4) is fixedly arranged on one side of the composite material molding surface (3), the second baffle (5) is fixedly arranged on the other side of the composite material molding surface (3).

2. The smart skin composite molding mold of claim 1, further comprising a plurality of wheels (6) disposed on both sides of the horizontal skeleton (1-1).

3. The smart skin composite material molding die according to claim 2, wherein four wheels (6) are arranged on each side of the horizontal skeleton (1-1).

4. The smart skin composite material molding die according to claim 1, wherein one positioning hole (7) is respectively arranged at four corners of the die.

5. The smart skin composite material molding die according to any one of claims 1 to 3, wherein the metal skeleton (1) is a steel skeleton.

6. The smart skin composite molding die of claim 4, wherein the lengths of the plurality of vertical skeletons (1-2) are not exactly the same.

7. The smart skin composite molding die of claim 4, wherein the first baffle (4) and the second baffle (5) are both elongated.

8. The method for preparing the smart skin composite material by using the smart skin composite material forming die as claimed in any one of claims 1 to 7, is characterized by comprising the following steps:

the method comprises the following steps: paving and sticking an inner skin and inner-layer foam on the composite material forming surface (3), and bonding a reflecting surface after curing;

step two: positioning and bonding the middle layer foam and the antenna unit by using a first baffle (4) and a second baffle (5);

step three: and paving and attaching outer-layer foam and an outer skin.

9. The method of claim 8, wherein the inner skin is a carbon fiber layer and the outer skin is a fiberglass layer.

10. The method according to claim 8 or 9, wherein the through holes for installing the electrical connectors on the smart skin composite material are subjected to numerical control machining by being referenced through positioning holes (7) on the die.