Fiber fabric winding deformation control method and forming mold thereof

Abstract

The invention relates to a fiber fabric winding deformation control method and a forming mold thereof. The control method comprises the following steps: S1 lifting a plurality of positioning pins arranged on the surface of the forming mold according to the design position of the fiber fabric wound on the forming mold; S2 winding the fiber fabric on the forming mold, and enabling a plurality of cross points of the warp-direction tracing yarn and the weft-direction tracing yarn arranged on the fiber fabric to correspondingly cover the positioning pins; S3 taking back the lifted positioning pins; and S4 wrapping the fiber fabric with the fixed mold, and injecting resin after vacuumizing. The invention provides the fiber fabric winding deformation control method and the forming mold thereof. The fiber deformation of each part of the fiber fabric in the winding process can meet the design requirement.

Description

technical field [0001] The invention relates to the technical field of fiber fabric manufacture, in particular to a method for controlling the winding deformation of a fiber fabric and a molding die thereof. Background technique [0002] Fiber-reinforced resin-based composites are currently one of the most important materials for aerospace structures. As the proportion of composite materials used in aircraft gradually increases, the size of composite components also increases. The traditional manual laying of prepregs uses laser projection equipment, which uses lasers to mark the outline of the position where the prepregs are to be laid. At present, the laying process of dry fiber fabrics generally involves placing tracer yarns on the surface of the fiber fabrics, and aligning the tracer yarns with the contour lines of the laser projection during laying to complete the laying of the fiber fabrics. [0003] The use of fiber fabrics to manufacture composite components, such ...

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Problems solved by technology

[0004] When using fiber fabrics to manufacture composite components with variable curvature and diameter, it is necessary to deform the fiber fabrics such as torsion, winding, and compaction to meet the forming requirements. When torsion and winding, traditional laser projection + tracer is usually used. Yarn technology is used to complete the deformation of fiber fabrics, but this method can only ensure the deformation of the fabric at the position of the tracer yarn, and ensure that the weaving structure of the fabric here is consistent with the design after deformation, and cannot accurately control other positions except the position of the tracer yarn , it is impossible to guarantee that the fiber deformation everywhere on the composite material part meets the design requirements

When the tracer yarn does not match the laser projection position, the deviation value can only be obtained through manual measurement, and then adjust the tracer yarn or fiber fabric of the next fiber fabric according to the deviation value, which cannot be adjusted in real time on the current fiber fabric

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