Composite material curved tube and preparation method thereof

Abstract

The invention provides a batch-production composite material curved tube and a preparation method thereof. The preparation of the composite material curved tube relates to three core technologies of water-soluble core mold preparation, three-dimensional woven prefabricated body preparation and HP-RTM curing molding, the outer contour of a core mold is molded by a mold, non-machining is realized, the efficiency is high, and the realization of mass production is facilitated. Metal positioning joints are fixed at the two ends of the water-soluble core mold, so that the problem that when the core mold is prepared, the problems that a product is difficult to position by only depending on a molded surface during curing in an HP-RTM mold, and in a three-dimensional weaving process, a mechanical arm needs to grab a product, and a grabbing point and a programming alignment point are difficult to find out on the product are solved, the water-soluble core mold which is independently researched and developed is used for replacing a traditional metal core mold for splicing, and the bent tube demolding problem is effectively solved. Full-automatic production is basically achieved, and batch production of 100,000 pieces per year is achieved.

Description

Technical field [0001] The present invention belongs to the technical field of aerospace, orbit vehicles, oil vessels, and specific relaxation, variable curvature, hollow closed composite curved tube and preparation method thereof. Background technique [0002] In the case of the structural characteristics of the hollow closed composite, it is applicable to aerospace, orbit vehicles, oil vessels, etc., such as Airbus A350-XWB fuselage frame, BMW new 7-Series side-around beam, space camera shading Hood, airlines, airlines, etc., oil pipelines, etc. [0003] Conventional curing mode (vacuum introduction, LP-RTM, prepreg molding) cycle is more than a few hours, in addition to the previous preparation time, 2-3 pieces of 2-3 pieces in 24 hours, difficult to meet the batch production level. As of now, only the HP-RTM and WCM forming processes enable the production of continuous fiber composite product molding parts / 3-5 min, while WCM can only shape 2D or 2.5 days of shell structure....

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the domestic production of composite material closed curved pipes is at the level of artificial single-piece small-batch manufacturing and cannot be produced in batches, the present invention proposes a composite material curved pipe and its preparation method. The method combines a water-soluble mandrel, three-dimensional braided The three core technologies of prefabrication and HP-RTM solidification molding are connected in series to form a research and development production line, realizing the mass production capacity of tens of thousands of pieces per year for a single production line

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