SYSTEM AND METHOD FOR FORMING A COMPOSITE STIFFENER

    公开(公告)号:US20240326352A1

    公开(公告)日:2024-10-03

    申请号:US18740695

    申请日:2024-06-12

    CPC classification number: B29C70/30 B29C70/54 B29C70/545 B29L2031/3076

    Abstract: A method for forming a composite stiffener includes locating a composite sheet on a support surface such that a first sheet-portion of the composite sheet is supported on the support surface and a second sheet-portion of the composite sheet extends beyond the support surface. The method includes separating the second sheet-portion from the first sheet-portion to at least partially form a composite charge. The method includes transferring the composite charge onto a layup surface of a layup tool, wherein the layup surface comprises a curvature along a longitudinal tool-axis of the layup tool. The method includes selectively positioning the layup tool relative to a compaction device such that a compaction force, applied to the composite charge by the compaction device, is normal to the layup surface. The method includes compacting the composite charge on the layup surface to form a portion of the composite stiffener.

    Sheet-shaped reinforcing fiber substrate and manufacturing method therefor

    公开(公告)号:US12090743B2

    公开(公告)日:2024-09-17

    申请号:US17295265

    申请日:2019-11-29

    Abstract: The present invention aims to provide a sheet-shaped reinforcing fiber substrate having shear deformability to conform to a three dimensional shape and restraining the generation of waste pieces to realize a large improve in the yield of reinforcing fibers and a reduction in production cost, and also provide a production method therefor.
    The sheet-shaped reinforcing fiber substrate has a layered structure containing N layers (N being an integer of 3 or more) produced by arranging a plurality of reinforcing fiber bundles with appropriate lengths and meets the requirements (1) to (5) given below:



    (1) in each layer, mutually adjacent reinforcing fiber bundles are aligned parallel to each other in such a manner that the clearance between mutually adjacent reinforcing fiber bundles is not smaller than the width of the reinforcing fiber bundles,
    (2) the reinforcing fiber bundles in a layer and those in the layer located immediately above or below and in contact therewith are aligned in different directions,
    (3) the length direction of the reinforcing fiber bundles in a randomly selected odd-numbered no'th layer (no being an odd number not less than 3 and not more than N) and the length direction of the reinforcing fiber bundles in the (no-2)'th layer are parallel to each other and the reinforcing fiber bundles in each layer do not overlap each other,
    (4) in the case where N is 4 or more, the length direction of the reinforcing fiber bundles in a randomly selected even-numbered ne'th layer (ne being an even number not less than 4 and not more than N) and the length direction of the reinforcing fiber bundles in the (ne-2)'th layer are parallel to each other and the reinforcing fiber bundles in each layer do not overlap each other, and
    (5) mutually intersecting reinforcing fiber bundles are joined together in at least part of the intersection regions where a reinforcing fiber bundles in any of the odd-numbered layers directly overlaps a reinforcing fiber bundle in any of the even-numbered layers.

    System and method for forming a composite stiffener

    公开(公告)号:US12053938B2

    公开(公告)日:2024-08-06

    申请号:US17701790

    申请日:2022-03-23

    CPC classification number: B29C70/30 B29C70/54 B29C70/545 B29L2031/3076

    Abstract: A system for forming a composite stiffener includes a support surface to support a composite sheet and a sheet-locating device to locate the composite sheet such that a first sheet-portion is supported on the support surface and a second sheet-portion extends beyond the support surface. The system includes a separation device to separate the second sheet-portion from the first sheet-portion to at least partially form a composite charge. The system includes a layup tool including a longitudinal tool-axis and a layup surface configured to receive the composite charge. The layup surface includes a curvature along the longitudinal tool-axis. The system includes a compaction device to compact the composite charge on the layup surface. The system includes a tool-positioning device to position of the layup tool such that a compaction force, applied to the composite charge by the compaction device, is normal to the layup surface.

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