Rotation body type composite material component forming method

Abstract

The invention relates to a rotation body type composite material component forming method. The forming method comprises the following steps that the surface of a forming tool is coated with a demoulding material; secondly, manual pavement and pasting of prepreg are conducted on the surface of the forming tool coated with the demoulding material, in the pavement and pasting process, pavement and pasting positioning is conducted, and a vacuum bag pressing method is used for conducting pre-compaction on the paved and pasted prepreg; thirdly, after pavement and pasting are finished, the paved andpasted prepreg is overturned, and rotation type prepreg is formed through overturning; and fourthly, an inflated cylindrical vacuum bag or air bag is used for packaging the rotation type prepreg, thencuring is conducted, and a rotation body type composite material component is obtained. According to the rotation body type composite material component forming method, fiber winding equipment is notneeded, and the production cost is reduced; and material sheet paving and pasting of a rigidity core die are not needed, and fiber wrinkling and deformation caused by the too long rigidity core die are avoided.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a forming method of a revolving body type composite material component. Background technique [0002] Composite gyrostructure is a structural element with reasonable stress form. It has the advantages of strong designability, high specific strength, specific modulus, small linear expansion coefficient and good fatigue resistance. It is widely used in aerospace and Sporting goods and other fields, such as: communication satellite antenna mast, engine bracket, UAV tube beam, fishing rod and racket, etc. The preparation method of the composite rotary structure generally adopts the rigid male mold forming method, the forming process is relatively simple, and the product is formed by the fiber winding process. figure 1 is a rigid mandrel, figure 2 It is a schematic diagram of the female mold tooling for the upper and lower petals. Such as figure 1 As shown, when using...

AI Technical Summary

Problems solved by technology

However, for the preparation of large-size, high-length-diameter-ratio rotary composite products, the filament winding process has obvious defects, because when using this process to prepare large-size, high-length-diameter ratio rotary composite products, it is necessary to use rigid The mandrel winds the fiber prepreg into a shape of revolution

However, due to the large size and large length-to-diameter ratio of the composite product (the length is more than 5 meters and the diameter is about 200mm), the rigid mandrel used for filament winding does not have sufficient support stiffness, and deformation and bending will occur in the length direction, resulting in During the fiber winding process, the circular runout of the rigid mandrel is very large, so that the wound fiber prepreg will also undergo large bending deformation and wrinkles, and the straightness and appearance quality of the product will be affected

[0003] As a commonly used main load-bearing part and secondary load-bearing part, rotary composite products have always been difficult to form and demould

The rigid mandrel has the problem of difficulty in mold loading and demolding: when the mold is installed, the laid fibers are prone to wrinkles or extrusion deformation at the mold clamping point; when demolding, if the mold release agent of the rigid mandrel If the brush is not in place, it is easy to get stuck inside the product; it is also difficult to guarantee the straightness of prepreg laying

Images