Z-direction zero-tension suture needle special for composite materials and using method thereof

Abstract

The invention relates to a Z-direction zero-tension suture needle special for composite materials and a using method thereof, and relates to the field of weaving and forming of composite materials. The suture needle is provided with a needle body, a yarn guide sliding groove is formed in the upper side of the needle body, a puncture needle tip is arranged at the front end of the needle body, a needle head threading hole is formed in the rear portion of the puncture needle tip, and a needle head wire hole is formed in the rear portion of the puncture needle tip. A puncture platform is arranged on the lower side of the puncture needle point, and a threading groove is formed in the puncture needle point. The use method comprises the following steps: sewing the tiled layer with the thickness of D; yarn goes out of the needle head at least 1mm through the guide chute and the needle head guide hole. During sewing, the needle body moves forwards, and the puncture needle tip drives the yarn to penetrate through the tiled layer and then continues to move forwards by 1 mmD; after the needle body moves backwards and the front end of the puncture needle tip is separated from the flat layer, the needle body translates by at least 1mm, and the actions are repeated to finish the suturing operation. The Z-direction zero-tension suture needle has the advantages of being simple in structure, convenient to use, good in product performance, high in consistency and the like, and the tiled layer structure and fiber lines thereof cannot be damaged.

Description

technical field [0001] The invention relates to the field of composite material weaving and forming. In detail, it is a simple structure, easy to use, will not damage the structure of the flat layer and its fiber lines, and the continuous fiber lines inserted in the longitudinal direction (Z direction) will not break, and the product performance is good. A special Z-direction zero-tension suture needle for composite materials with high consistency and a use method thereof. Background technique [0002] We know that ceramic matrix composites and resin matrix composites are lightweight, high-strength, high-modulus new materials that are reinforced by glass fiber, carbon fiber or other high-performance continuous fibers. They are used in aerospace structural parts and friction parts, aerospace Ablation-resistant parts and new energy vehicles have a wide range of applications. Among them, composite laminates are a kind of commonly used composite materials suitable for large com...

AI Technical Summary

Problems solved by technology

The existing process of adding continuous fibers in the thickness direction of composite laminates generally adopts traditional crochet stitching. The existing process of adding continuous fibers to the thickness direction of composite laminates using crochet needles is easy to be mistakenly hooked to the flat layer ( X, Y plane layer) fiber lines, damage the structure and fiber lines of the flat layer, and when the thickness of the suture (flat layer) is greater than 20mm, it is easy to cause the continuous fiber inserted in the longitudinal direction (Z direction) to break, affecting final product performance, making it poorly consistent

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