Forming method suitable for T-shaped and L-shaped composite material wall plates

Abstract

The invention belongs to the technical field of forming of composite materials, and relates to a forming method suitable for T-shaped and L-shaped composite material wall plates. A forming mode combining a soft film positioning plate and a soft film is adopted, a fit clearance does not exist, pressure transmission is uniform, and the internal quality of formed wall plates is good. There are only afew molds in a vacuum bag, heat transferring is uniform, and the uniformity of a temperature field is good. The number of molds entering a tank is small, a soft film forming mold is low in precisionand does not need to enter the tank, and the overall mold cost is low. The assembling clearance is small, the forming quality is good, and the forming method is suitable for wall plates with large skin thickness change or large skin shape change. By means of the forming method suitable for T-shaped and L-shaped composite material wall plates, the internal quality of composite material wall platesformed through the method is high, studs are high in position precision, and the forming method is particularly suitable for forming wall plates with complex surfaces and many variable-thickness areas, and lays a certain technical foundation for development of composite materials.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and relates to a molding method suitable for T-shaped and L-shaped composite material wall panels. Background technique [0002] The traditional T-shaped and L-shaped composite wall panel forming process methods are more mature. There are A (hard mold and hard mold combined forming) and B (hard mold and soft mold combined forming). If the traditional method is used to prepare the wall panel, it will Bring a lot of difficulties in manufacturing, if use hard mold and hard mold to form (such as figure 1 as shown) or molded with soft mold and hard mold (such as figure 2 shown), then [0003] 1. There is a perfect fit between the die and the die, and there will definitely be a fit gap, which will cause uneven pressure transmission and easily cause internal quality defects; [0004] 2. Put too many molds in the vacuum bag, resulting in uneven heat transfer and poor uniformity of ...

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Problems solved by technology

[0002] The traditional T-shaped and L-shaped composite wall panel forming process methods are more mature. There are A (hard mold and hard mold combined forming) and B (hard mold and soft mold combined forming). If the traditional method is used to prepare the wall panel, it will Bring a lot of difficulties in manufacturing, if use hard mold and hard mold to form (such as figure 1 as shown) or molded with soft mold and hard mold (such as figure 2 shown), then

[0003] 1. There is a perfect fit between the die and the die, and there will definitely be a fit gap, which will cause uneven pressure transmission and easily cause internal quality defects;

[0004] 2. Put too many molds in the vacuum bag, resulting in uneven heat transfer and poor uniformity of temperature field;

[0005] 3. The hard mold should be put into the tank together with the parts, which requires relatively high pressure resistance and accuracy of the mold, resulting in high mold cost and price;

[0006] 4. If the thickness of the skin changes greatly, or the shape of the skin changes greatly, if the traditional molding method is used, there will be assembly gaps and poor molding quality

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