A method for making carbon twisted yarn in the r-angle region

Abstract

The invention discloses a method for manufacturing carbon-twisted yarns in the R-angle area. The carbon-twisted yarns are prepared by manual laying, and the manufacturing process of the carbon-twisted yarns for the C-shaped frame composite material structural parts is completed, ensuring that each thin strip can be Completely follow the shape, so that the surface quality and internal quality of the triangular area meet the design requirements, ensuring product quality stability. Moreover, the method of the present invention can control the filling amount through the external mold pressing, avoiding the phenomenon of insufficient filling or excessive filling, and ensuring the stability of product quality. Moreover, the preparation method of the present invention can ensure the continuity of the carbon twisted filaments, thereby improving the requirements for product molding quality and the like. In addition, the method of the present invention does not require pre-compacting tooling, which saves manufacturing costs.

Description

technical field [0001] The invention relates to a method for making carbon twisted yarns in the R angle region. Background technique [0002] Resin-based carbon fiber composite materials have superior properties such as specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. They are currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. [0003] C-shaped frame structure with L-shaped ribs, such as figure 1 As shown, it is a relatively common reinforced structural member in composite material parts. It is usually divided into structural forms such as equal-section C-shaped frames and variable-section C-shaped frames. The characteristics of the C-shaped structure are large overall size and complex structure, and are The arc-shaped structure has high curvature, but the C-shaped frame can meet the load strength, reduce ...

AI Technical Summary

Problems solved by technology

However, the carbon twisted wire prepared in this way has a relatively high rigidity, and cannot be completely conformed to the shape in the region with a large curvature, and the product quality cannot be guaranteed. Its metallographic structure is as follows: image 3 shown

In addition, the disadvantages of adopting the carbon twisted wire forming process mainly include the following aspects: 1. For the C-shaped frame with large curvature, the general carbon twisted wire forming process tends to cause the thicker part of the twisted wire and strong rigidity. It is easy to produce wrinkles, making it difficult to ensure the size and thickness of the triangular area

2. For the large-size C-shaped frame, the carbon-twisted wire cannot completely follow the shape during the filling process, especially in the area where the curvature changes greatly, it is easy to appear rich resin and other phenomena, which will affect the quality of the part and cause the surface quality of the triangular area and internal quality substandard

3. In the general carbon twisted filament forming process, the filling amount is generally prepared by obtaining data from theoretical calculations, but there is often a certain error between the theoretical data and the actual application, so the filling amount cannot be controlled, and the stability of product quality cannot be guaranteed.

4. For different types of C-shaped frames, it is necessary to prepare carbon twisted wire preforming tooling of different specifications, which increases manufacturing costs

Images