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US 7,247,212 B2Granted
Orthogonal weaving for complex shape preforms
AssigneeGeneral Electric Company
InventorsTimothy Daniel Kostar, Douglas Melton Carper, Suresh Subramanian
Life of this patent
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Abstract
An orthogonal stitch-weave method and fiber architecture. The architecture allows near-net-shape composite preforms to be fabricated, thereby reducing costs associated with complex preform shapes and increasing desired strengths of the composite.
Claims14
A method of weaving a preform for forming a finished ceramic matrix composite comprising:
- positioning a predetermined number of pins in a base, wherein the pins extend perpendicularly from the surface of the base and wherein the pins are positioned laterally across the base to form a general outline of a desired preform shape;
- positioning a first predetermined number of weft tows adjacent the pins in a first path forming a general outline of the desired preform shape;
- positioning a predetermined number of stitcher tows adjacent to the pins, wherein the stitcher tows are positioned adjacent to the first predetermined number of weft tows and perpendicular to the path forming the general outline of the desired preform shape;
- and
- advancing the pins perpendicularly through the base to provide sufficient pin length to allow positioning of additional weft tows and stitcher tows;
- wherein the positioning of the weft tows, the positioning of the stitcher tows and the advancing of the pins are repeated until the weft tows and the stitcher tows form a predetermined thickness;
- wherein upon achieving said predetermined thickness, the pins are removed and replaced with a warp tow to form the desired preform shape.
4 more elements
A method of making a ceramic matrix composite comprising:
- weaving fiber tows into a ceramic matrix composite preform,
- wherein weaving fiber tows includes,
- positioning a predetermined number of pins in a base, wherein the pins extend perpendicularly from the surface of the base and wherein the pins are positioned laterally across the base to form a general outline of a desired preform shape;
- positioning a first predetermined number of weft tows adjacent the pins in a first path forming a general outline of the desired preform shape;
- positioning a predetermined number of stitcher tows adjacent to the pins, wherein the stitcher tows are positioned adjacent to the first predetermined number of weft tows and perpendicular to the path forming the general outline of the desired preform shape;
- and
- advancing the pins perpendicularly through the base to provide sufficient pin length to allow positioning of additional weft tows and stitcher tows;
- wherein the positioning of the weft tows, the positioning of the stitcher tows and the advancing of the pins are repeated until the weft tows and the stitcher tows form a predetermined thickness;
- wherein upon achieving said predetermined thickness, the pins are removed and replaced with a warp tow to form the desired preform shape, and thereafter,
- processing the ceramic matrix composite preform into a ceramic matrix composite wherein the processing forms a finished ceramic matrix composite substantially without trimming of the preform.
7 more elements
Dependencies are inferred from the claim text.