Method for weaving 2.5D angle-interlock preformed part with section gradually decreasing

A prefabricated, corner interlocking technology, used in textiles, papermaking, fabrics, textiles, etc., can solve the problems of increased processes, inability to complete, and reduced performance of parts, to improve quality and performance, reduce fiber damage, and reduce processing. The effect of the process

Inactive Publication Date: 2018-02-27
TIANJIN POLYTECHNIC UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the overall preforming of such variable cross-section parts, the traditional basic three-dimensional weaving method or technology cannot be completed, and cannot meet the requirements of high-performance composite materials for preforms
The current solution is to use traditional machining methods to obtain the required variable-section shape on the basis of the corresponding equal-section preformed parts, such

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
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  • Method for weaving 2.5D angle-interlock preformed part with section gradually decreasing
  • Method for weaving 2.5D angle-interlock preformed part with section gradually decreasing
  • Method for weaving 2.5D angle-interlock preformed part with section gradually decreasing

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Example Embodiment

[0028] Example 1:

[0029] Adopt the trapezoidal body component (referring to of the inventive method weaving) Image 6 ). The cross-sectional size of its large end is 100mm×1.5mm (width×thickness), the trapezoid height is 100mm, the warp yarn density is 10 yarns / cm, the weft yarn density is 8 yarns / cm, the warp and weft yarns are carbon fiber T300-3K, and the reed used is 10 teeth / cm. According to the size requirements and density of the workpiece, the number of warp yarns required is 500, and the length of the warp yarns must be at least greater than 100mm.

[0030] Warp yarn 5 is passed through reed 4 according to the requirement of warp density, and is suspended on the yarn hanging point 9 on the machine chassis 7 . The up and down reciprocating motion of the machine chassis 7 drives the warp yarn 5 to reciprocate up and down, and 6 or 4 channels are formed between the warp yarns 5 during the up and down reciprocating process. At this time, the weft yarn 3 is passed thr...

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
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Abstract

The invention relates to a method for weaving a 2.5D angle-interlock preformed part with the section gradually decreasing. On the basis of a layer-layer angle-interlock weaving process, the method ischaracterized in that in the weaving process, with one end surface of the preformed part as a standard, according to the change of the size of the section of the preformed part and the movement law ofyarn, the quantity and positions of yarn-reducing points in a plane in the weaving direction are designed, and the yarn-reducing points are evenly distributed; by means of the methods of yarn reduction, yarn movement and yarn reed replacement, the section change of the preformed part is achieved, and the section-variable preformed part is woven. The method is simple and high in applicability, thewoven formed part is good in integrity, and the mechanical properties of composites can be improved.

Description

technical field [0001] The invention belongs to the field of three-dimensional fabric weaving, and in particular relates to a weaving method for a 2.5D corner interlocking prefabricated part with decreasing cross section. Background technique [0002] The traditional laminated composite material adopts the laminate structure, and the weak interlayer performance is its main defect. In the three-dimensional fabric prefabricated part prepared by three-dimensional weaving technology, the reinforcing fibers are interwoven in three-dimensional space, which has good structural integrity. While improving the overall mechanical properties of the material, the impact toughness and damage tolerance of the composite are improved. [0003] The reinforced structure of the composite material or the shape structure and quality of the support body preform basically determine the performance of the composite material. However, in engineering applications, there is a kind of composite materia...

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
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Application Information

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IPC IPC(8): D03D25/00
CPCD03D25/005
Inventor 孙颖刘俊岭陈利田书全陈冬
Owner TIANJIN POLYTECHNIC UNIV
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