A kind of preparation equipment and method of prefabricated body with bent section

A prefabricated body and section technology, applied in the field of resin-based composite material molding, can solve problems such as performance values ​​deviating from expected design values, uncontrollable fiber deformation, fiber buckling, etc., to improve reliability and stability, reliability and repeatability Good, fibrosis controllable effect

Active Publication Date: 2022-04-19
AVIC BASIC TECH RES INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, this kind of prefabricated body is prepared by manual laying method, which currently has the following problems: (1) The external force applied by hand is uncontrollable and random, resulting in uncontrollable fiber deformation, prone to fiber buckling, wrinkles, fiber The actual orientation deviates from the theoretical orientation and other defects; (2) The actual orientation of the fiber is difficult to predict, resulting in large dispersion of mechanical properties of the composite material, and the performance value deviates from the expected design value, and even cannot be used under normal conditions; (3) The repetition of component development The reliability is completely dependent on the proficiency of the workers, the reliability is poor, and the scrap rate is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation equipment and method of prefabricated body with bent section
  • A kind of preparation equipment and method of prefabricated body with bent section
  • A kind of preparation equipment and method of prefabricated body with bent section

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation equipment with bent cross-section prefabricated body, the structure of the formed axially curved П-shaped composite material blank is: its cross-sectional shape is П-shaped, and the П-shaped composite material blank is composed of a web and edge strips on both sides Composition, the thickness is δ, the width of the web is b, the width of the outer edge strip is L1, the width of the inner edge strip is L2, and the edge strips on both sides are part of the concentric ring, and the circle of the ring where the inner edge strip is located The arc radius is R, the arc radius of the ring where the outer edge is located is R+b, the R angle between the inner edge and the web is R1, and the R angle between the outer edge and the web is R2.

[0030] The preparation equipment for preforms with bent sections is divided into three areas: area I for feeding and guiding flat belts to rollers, area II for geometric section roll forming, and area III for bending roll form...

Embodiment 1

[0042] Example 1: Preparation of П-shaped beam prefabricated body with CF3031 / EP sizing agent

[0043]In this embodiment, the diameters of the inner and outer edge strips of the П-shaped beam are 2300mm and 2500mm respectively, and the thickness is 3mm. The strip material used is CF3031 fabric laminate, and the sizing agent is EP. Place the CF3031 / EP sizing fabric tape on the reel on the first template with a cross-section of П and extending along a straight line. According to the viscosity temperature test of the EP sizing agent resin, 70-90 ° C is selected as the molding temperature. Set the speed of each outer vertical roller in Zone II to 0.5m / min, set the speed of the vertical rollers outside the inner edge strip in Zone III to 0.54m / min, and set the speed of the vertical rollers outside the outer edge strip in Zone III to 0.5m / min. The speed of the rollers is set to 0.6m / min, and the gap between the vertical roller pairs is adjusted to 3mm. Press the cylinder, turn on t...

Embodiment 2

[0044] Example 2: Preparation of Z-beam prefabricated body with CFF3031 / EP sizing agent

[0045] The difference between this embodiment and Embodiment 1 is that the prefabricated body structure is changed from П-shaped to Z-shaped; The shape and surface are consistent, and other operations are the same as in Example 1, and the Z-shaped prefabricated body is obtained with good quality.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of resin-based composite material molding, and relates to a preparation device and method for a prefabricated body with a bent section. For the paving process of complex curved surfaces that cannot be developed, the external force applied by hand is uncontrollable and random, and the actual orientation of fibers is difficult to predict, resulting in large dispersion of mechanical properties of composite materials, and the performance values ​​deviate from the expected design values. The present invention has the preparation equipment of bent cross-section prefabricated body, is used for forming the plane strip material into the prefabricated body of "П" type cross section, and this equipment comprises feeding and flat belt pair roller guiding area I, geometric cross-section roller connected successively Press forming area II and bending roll forming and guiding output area III. Fiber degeneration is controllable, with good reliability and repeatability; continuous operation, that is, continuous repetition of this process to obtain a preform with unlimited length, high production efficiency; less cutting loss during the molding process, which can reduce material costs and meet different cross-sections Forming of preforms.

Description

technical field [0001] The invention belongs to the technical field of resin-based composite material molding, and relates to a preparation device and method for a prefabricated body with a bent section. Background technique [0002] There are "П" type, "L" type, "Z" type and other multi-bending corner resin-based composite parts with curvature on the aircraft. Such parts often have an assembly relationship, and their dimensions and surface precision require high. This type of composite material parts based on fabric layup requires external force to attach the fabric to the surface of the mold tooling during the layup stage. For complex curved surfaces that cannot be developed, draping requires the fabric to conform to the tooling surface through deformation. [0003] At present, this kind of prefabricated body is prepared by manual laying method, which currently has the following problems: (1) The external force applied by hand is uncontrollable and random, resulting in u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B29B11/14B29B11/12
CPCB29B11/14B29B11/12B29C49/071B29C2949/0715
Inventor 马金瑞黄峰刘强赵龙王宇
Owner AVIC BASIC TECH RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap