阅读说明：本技术 大型纤维增强复合材料曲面和加强筋板一体成型及分段拼接方法 (Method for integrally forming and sectionally splicing curved surface and reinforcing rib plate of large fiber reinforced composite material ) 是由 乔光辉 刘卫生 孙巍 刘路 于 2020-05-13 设计创作，主要内容包括：本发明公开了一种大型纤维增强复合材料曲面和加强筋板一体成型及分段拼接方法,包括1)在模具内铺设纤维织物作为蒙皮(1)及翻边(4)；2)在蒙皮(1)上铺设铺放泡沫芯材、充气袋或其它材料作为纵向加强筋(2)和横向加强筋(3)的内支撑材料；3)在内支撑材料上方按要求铺放纤维织物形成纵向加强筋(2)和横向加强筋(3)；4)铺设隔离膜、导流网、导流槽、真空袋系统等,抽真空、真空灌注树脂固化成型；5)脱模后在翻边上涂抹胶粘剂,利用工装进行多段产品的拼接。本发明结构设计合理,操作工艺合理,操作方便,效率高,可减少加强筋板连接紧固件的使用量,缩短制造周期,降低模具成本。(The invention discloses a method for integrally forming and sectionally splicing a curved surface and a reinforcing rib plate of a large fiber reinforced composite material, which comprises the following steps of 1) paving fiber fabrics in a mould to serve as a skin (1) and a flanging (4); 2) laying and laying a foam core material, an air bag or other materials on the skin (1) as inner support materials of the longitudinal reinforcing ribs (2) and the transverse reinforcing ribs (3); 3) laying fiber fabrics above the inner support material according to requirements to form longitudinal reinforcing ribs (2) and transverse reinforcing ribs (3); 4) laying an isolation film, a flow guide net, a flow guide groove, a vacuum bag system and the like, vacuumizing, and filling resin in vacuum for curing and forming; 5) and after demolding, coating an adhesive on the flanging, and splicing the multiple sections of products by using the tool. The invention has reasonable structural design, reasonable operation process, convenient operation and high efficiency, can reduce the use amount of the reinforcing rib plate connecting fastener, shortens the manufacturing period and reduces the die cost.)

1. A large-scale fiber reinforced composite material curved surface and reinforcing rib plate integrated forming and segmented splicing method is characterized by comprising the following steps:

laying fiber fabrics as a skin (1) and a flanging (4) in the mould;

laying a foam core material or an air bag on the skin (1) as an inner support material of the longitudinal reinforcing ribs (2) and the transverse reinforcing ribs (3);

laying fiber fabrics above the inner support material according to requirements to form longitudinal reinforcing ribs (2) and transverse reinforcing ribs (3);

laying an isolation film, a flow guide net, a flow guide groove and a vacuum bag system on the longitudinal reinforcing ribs (2) and the transverse reinforcing ribs (3), vacuumizing and maintaining pressure to be qualified, and performing resin vacuum infusion to realize integral curing molding;

after molding, demolding to obtain a single-section product; and (3) coating an adhesive on the flanging (4) of the plurality of single-section products, and splicing by using a fixture tool to finish the large-scale fiber reinforced composite material curved surface product.

2. The method for integrally forming and sectionally splicing the curved surface and the reinforcing rib plate of the large-scale fiber reinforced composite material according to claim 1, wherein the skin (1) and the turned-up edge (4) in the step A are prepared by laying the fiber reinforced composite material.

3. The method for integrally forming and sectionally splicing the curved surface and the reinforcing rib plate of the large-sized fiber reinforced composite material according to claim 1, wherein the step B comprises the following steps: the method comprises the following steps of accurately laying a foam core material or an inflatable bag according to a design drawing by using a position positioning line on a flange edge of a mold to form an internal support structure of a reinforcing rib, wherein the step is a key step of integral forming.

4. The method for integrally forming and sectionally splicing the curved surface and the reinforcing rib plate of the large-sized fiber reinforced composite material according to claim 1, wherein the step E comprises the following steps: the inner flanging (4) is used as a bonding edge to splice a plurality of single-section products into a whole.

Technical Field

The invention belongs to the field of structural design and manufacture of large composite material products, and particularly relates to a method for integrally forming and sectionally splicing a curved surface and a reinforcing rib plate of a large fiber reinforced composite material.

Background

Due to the characteristics of light weight, corrosion resistance and the like of the composite material, under the current trend of light weight of the material, more and more products tend to be made of the composite material as a substitute material, so that the purpose of reducing weight is achieved.

At present, products of large skin structures, such as extension blade products, adopt a structural scheme suitable for metal materials, a plurality of composite square tube reinforcing ribs are assembled by means of a very complex die through mechanical connection and hand pasting of fiber cloth, and then outer skins are hand pasted on a frame formed by square tubes.

This structural scheme is extremely loaded down with trivial details consuming time to the manufacturing process, and operational environment is poor, and square union strength is weak, and size control accuracy is poor and the lightweight effect is relatively poor. For the curved surface structure with large width and extremely long length, the manufacturing difficulty is high, the manufacturing cost is high, and the efficiency is low.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the technical problems and provides a method for integrally forming and splicing a large-scale composite material curved surface and a reinforcing rib plate, which has the advantages of low manufacturing cost, convenient and efficient operation, suitability for preparation of large-scale curved surface and reinforcing rib plate composite material products and light weight of the prepared products.

The technical scheme is as follows: in order to realize the purpose of the invention, the invention adopts the technical scheme that:

a large-scale fiber reinforced composite material curved surface and reinforcing rib plate integrated forming and segmented splicing method is characterized by comprising the following steps:

A. laying fiber fabric as skin and flanging in the mould;

B. laying a foam core material, an air bag or other materials on the skin as inner support materials of the longitudinal reinforcing ribs and the transverse reinforcing ribs;

C. laying fiber fabrics above the inner support material according to requirements to form longitudinal reinforcing ribs and transverse reinforcing ribs;

D. laying an isolation film, a flow guide net, a flow guide groove and a vacuum bag system on the longitudinal reinforcing ribs and the transverse reinforcing ribs, vacuumizing and maintaining pressure to be qualified, and performing resin vacuum infusion to realize integral curing molding;

E. after molding, demolding to obtain a single-section product; and (3) coating an adhesive on the turned edges of the plurality of single-section products, and splicing by using a tool to finish the large-scale fiber reinforced composite material curved surface product.

According to the preferred scheme, the skin and the flanging in the step A are manufactured by laying the fiber reinforced composite material.

As a preferred scheme, the method for integrally forming and sectionally splicing the curved surface and the reinforcing rib plate of the large fiber reinforced composite material comprises the following steps: and laying a foam core material as an inner support structure of the reinforcing rib, and accurately laying the foam core material according to a design drawing by using the position positioning mark on the flange edge of the mould.

As a preferred scheme, the method for integrally forming and sectionally splicing the curved surface and the reinforcing rib plate of the large fiber reinforced composite material comprises the following steps: the inner flanging (4) is used as a bonding edge to splice a plurality of single-section products into a whole.

Has the advantages that: the large-scale fiber reinforced composite material curved surface and reinforcing rib plate integrated forming and splicing method provided by the invention has the advantages that the integral layer is poured and formed, the structural design is reasonable, the operation is convenient, and compared with the conventional technology, the large-scale fiber reinforced composite material curved surface and reinforcing rib plate integrated forming and splicing method has the characteristics of integration and light weight; the integral forming technology is adopted, the use amount of the reinforcing rib plate connecting fastener is reduced, and the manufacturing period is shortened; the method of splicing the sections by using the turned edges can greatly reduce the cost of the die and reduce the transportation pressure.

Drawings

FIG. 1 is a schematic view of a curved surface integrally formed structure of a large composite material;

FIG. 2 is a schematic view of a large composite material curved surface segment splicing method.

Detailed Description

The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.