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A method for forming a composite material tubular member

A composite material and molding method technology, which is applied in the field of composite material preparation technology, can solve the problems of high loss rate of prepreg, inability to perform local winding, unstable layup quality, etc., and achieve molding speed and molding quality advantages, matching methods Reasonable and feasible to ensure the compactness of the ply

Active Publication Date: 2021-02-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prepreg manual lay-up molding process has low lay-up angle accuracy, unstable lay-up quality, and low molding efficiency; the winding range is limited when forming a cylindrical structure by the fiber winding molding process, and local winding cannot be performed; the forming angle of the fiber winding molding process Restricted, small-angle winding cannot be carried out; the fiber winding molding process needs to be wound with a head, and there is fiber waste; the tape laying molding process has a high loss rate of prepreg when forming a large-angle (above 60°) layer, and forming a 90° ring Low efficiency when layering

Method used

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  • A method for forming a composite material tubular member
  • A method for forming a composite material tubular member
  • A method for forming a composite material tubular member

Examples

Experimental program
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Effect test

Embodiment

[0060]A cylindrical member with a length of 7m, a radius of 2m, and a thickness of 18mm was formed using this forming process. The first 5 layers of the cylindrical structure are laid in the order [90 / 0 / 90 / 0 / 90]. 90° layer uses winding forming method, the width of winding tape d1=50mm, the actual winding angle is 89.5°, and the tape forming method is used at 0°, the width of the tape is d2= 150mm, 90° winding tension is 9.2N / mm, 9N / mm, 8.8N / mm, 0° layup pressure is 19.8N and 19.4N. The molding cycle of the cylindrical component is 12 days, which is nearly half shorter than the original manual molding cycle of 23 days.

[0061]Ultrasonic non-destructive testing method was used to test the whole cylinder after forming. The test results showed that there were no defects such as delamination, looseness, pores, etc. on the whole of the component. Partial sampling of the component was carried out and the metallographic test was made. The porosity of the component is less than 0.3%.

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Abstract

The invention relates to a molding method of a composite material tubular member, belonging to the technical field of composite material preparation technology. In the non-90° layer of the present invention, a positive pressure is applied during the automatic laying process to form a molding pressure. Convert the tape laying forming pressure and winding tension into forming pressure, coordinate and control according to the provided forming pressure, and adjust the winding tension and tape laying pressure according to the actual prepreg tape width, total layer thickness, product diameter and other requirements , to achieve the goal of basically consistent molding pressure, and to achieve the matching of tape laying and winding processes.

Description

Technical field[0001]The invention relates to a method for forming a composite material cylindrical member, which belongs to the technical field of composite material preparation technology.Background technique[0002]There are mainly three molding processes for the existing composite material cylindrical structure, one is the manual layup molding process using prepreg, and the other is the filament winding molding process. The other is the tape laying process. The prepreg manual layup molding process has low lay angle accuracy, unstable layup quality, and low molding efficiency; the winding range of the filament winding molding process is limited when the cylindrical structure is formed, and local winding cannot be performed; the molding angle of the fiber winding molding process Restricted, small-angle winding cannot be carried out; filament winding molding process requires winding with a head, and there is fiber waste; the prepreg loss rate is high when forming large-angle (above 6...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/30B29C70/38B29C70/54
CPCB29C70/30B29C70/386B29C70/54
Inventor 陈亮沈登雄王俊锋张建宝张蕾张来锁
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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