Integrated curing method of three-dimensional braided tubular preform and end joints

Abstract

The present invention provides a method for integrally solidifying a three-dimensional braided tubular preform and an end joint, comprising the following steps: 1. integrally extending a section of connecting column at the inner end of the end joint; 2. using the connecting column of the end joint As a mandrel, a three-dimensional braided tubular preform is woven on the outer surface of the connecting column with a three-dimensional braiding process; 3. Put the end joints and the three-dimensional braided tubular preform into the mold together, and solidify through the composite material molding process integrated structure. Utilizing the method of the present invention to manufacture the connecting joints with integral solidification of composite materials is convenient for batch production of connecting joints with complex structures, and can also achieve high load-bearing capacity of composite material pipes that are difficult to achieve by other processes, and can be conveniently used to make tensile-resistant pipes , Compression, bending, torsion and other loads of high-performance composite structural parts, such as tie rods, struts, torsion bars, beams, transmission shafts, etc.

Description

technical field [0001] The invention relates to an integral solidification method of a three-dimensional braided tubular preform and an end joint. Background technique [0002] Composite structural parts usually need to be combined into an overall composite structure through gluing, screwing, riveting and other processes. So far, composite material structural parts, especially tie rods, struts, torsion bars, beams, drive shafts, etc. usually have to process composite material pipes and supporting joints separately, and then glue the joints and composite material pipes, or Glue screws and glue rivets are connected, and finally the corresponding composite structural parts are obtained. In practical applications, there is also a process of solidifying and co-gluing metal embedded parts and composite parts, but they often cannot bear larger loads. Therefore, how to make tubular structural parts that can give full play to the high load-bearing capacity of composite materials It...

AI Technical Summary

Problems solved by technology

[0004] The excellent mechanical properties of 3D braided composites also bring certain obstacles to the design and manufacture of their connection structures.

For example, in high-load-bearing components, if the overall three-dimensional braided structural parts with joints are used, although the performance advantages are outstanding, it usually brings a series of problems such as sharply increased costs, long construction periods, and low production efficiency, which affects the Applications of Materials and Their Structures

Using metal or other materials to make joint connectors can solve the above problems, but how to connect is still a problem to be solved. If traditional glue joints, screw joints, riveting, or glue screws, glue riveting and other processes are still used, in addition to the original In addition to problems, it may also cause damage to the internal fiber structure, cause defects and damage, and increase the difficulty and cost of subsequent connection processes, etc.

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