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A kind of preparation method of continuous fiber resin matrix composite material fastener

A continuous fiber and composite material technology, applied in the field of resin-based composite material preparation, can solve the problems of thread formation, insufficient mechanical properties, weak transverse strength of continuous fiber, etc., and achieve the effect of high yield and good reliability

Active Publication Date: 2016-09-14
AEROSPACE PRECISION PROD INC LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the field of fastener forming technology, the forming technology of metal materials is very mature, and the injection molding technology of chopped fiber and long fiber composite materials has also reached engineering applications, but its mechanical properties are not enough to match metal fasteners. contend
Continuous fiber composites have great advantages in axial strength, but due to the weak transverse strength of continuous fibers, composites cannot be threaded by injection molding or rolling, so they are only used in sheets prepared by laying up and other large components, not used in fasteners

Method used

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  • A kind of preparation method of continuous fiber resin matrix composite material fastener
  • A kind of preparation method of continuous fiber resin matrix composite material fastener
  • A kind of preparation method of continuous fiber resin matrix composite material fastener

Examples

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Embodiment 1

[0031] Preparation of M6 hex head bolts

[0032] Prepare M6*15 hexagon head bolt fasteners with a strength above 200MPa, weave a bundle of 3K carbon fibers (single filament diameter 7μm) and 16 polyetheretherketone resin filaments (single filament diameter 0.15mm) into a composite filament, and control the carbon fiber The volume ratio is 28.5%. According to the size of M6 hex head bolts (various size parameters can be obtained by referring to the fastener standards of relevant specifications), determine the size of each part of the intermediate bar, that is, the volume of the large head is about 346.2mm 3 , the height of the big head is 8mm, and the volume of the thin rod (threaded rod plus threaded part) is about 332.9mm 3 , the diameter of the thin rod is 4.4 mm, the height of the intermediate rod is 30 mm, and then 56 composite wires are cut with a length of 30 mm. Put the intercepted composite wire into a preforming mold made according to the size of the above-mentioned...

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Abstract

The invention provides a preparation method of a fastening member made of continuous fiber-resin based composite material. The preparation method comprises the following steps: carrying out pre-moulding so as to make a certain amount of composite silks, which is prepared by weaving fibers and resin silks together, into intermediate rods, and carrying out secondary moulding so as to convert the intermediate rods into fastening members. The moulding process of the fastening members is controlled by calculating the sizes of each part of the intermediate rods and separating the heating process into two steps so as to achieve step-by-step moulding in the secondary moulding process. A feasible technical process is provided for the preparation of fastening members made of continuous fiber-resin based composite material.

Description

technical field [0001] The invention relates to the technical field of preparation of resin-based composite materials, in particular to a method for preparing continuous fiber resin-based composite material fasteners. Background technique [0002] Advanced resin-based composite materials have been widely used in the world's advanced aircraft body structures due to their light weight, high strength, corrosion resistance, and fatigue resistance. At present, most of the fasteners are still made of metal, and metal fasteners not only cannot be well matched with composite materials, but also have large specificity, high temperature resistance, and limited corrosion resistance, which are difficult to meet the requirements of aviation, aerospace and other fields. Urgent needs. Due to the special layered structure of the composite material, which is very different from the metal structure, it is necessary to use matching connectors to solve the weaknesses of the composite material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D1/00
Inventor 张晓玲赵国盟焦莎潘慧张文静郑晓冬郭双双徐涛涛
Owner AEROSPACE PRECISION PROD INC LTD
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