Multi-directionally preformed braided part and three-dimension integrally braiding method thereof

Abstract

The invention discloses a multi-directionally preformed braided part, which comprises at least two components having different forming directions. Fiber bundles inside the braided part run through the components along different forming directions to form an integral structure. The intersection position of the components having different forming directions is provided with a through hole. The invention also provides a three-dimension integrally braiding method of the multi-directionally preformed braided part, which comprises: a step 1 of determining forming directions; a step 2 of determining a theoretical intersection position; a step 3 of determining a thread leading region and a thread adding region for theoretical intersection; a step 4 of braiding the first component, in which a fiber bundle passing the position of the thread leading region for theoretical intersection is led out and a leading-out end is left when the braiding reaches the position, and new fiber bundles prepared in advance are added to the position of the thread adding region for theoretical intersection and a preserved end is left when the braiding reaches the position; and a step 5 of changing braiding direction to braid the second components till the braiding of the second component is finished.

Description

technical field [0001] The invention relates to a braided piece and a weaving method, in particular to a multidirectional preformed braided piece and a weaving method thereof. Background technique [0002] At present, the three-dimensional weaving technology is mainly based on the four-step three-dimensional weaving process, which originates from the four-step three-dimensional weaving method described by R.A. Florentine in its patent (US 4312261). Based on it, people have made various improvements to the above method, but no matter how it is improved, there is generally only one forming direction of the workpiece. [0003] However, in real life, the desired product will have two or more weaving directions. For example, a rectangular cross-section corner product has two weaving directions; another example is a multi-directional preformed braid of a complex shape composite material support composed of two or more geometric bodies intersecting in space, with two or more the ...

AI Technical Summary

Problems solved by technology

[0014] (1) There is a spacer 13 between the main pipe 10 and the branch pipe 11 of the three-dimensional braided preformed braid, which causes the internal space of the main pipe 10 and the branch pipe 11 to be unable to communicate, so that this product cannot be used as a multi-way connection joint

[0015] (2) Among all the fiber bundles forming the branch pipe 11, half of the fiber bundles (such as 14, 17) come from the area other than the partition 13 of the main pipe 10, and the other half of the fiber bundles (such as 15, 16) come from the partition 13, and when the thickness of the main pipe and the branch pipe is similar, the connection between the spacer 13 and other parts of the main pipe is relatively weak due to the addition of wires and lead wires at the intersection line 12 of the spacer 13, thus affecting the connection performance between the branch pipe 11 and the main pipe 10

[0016] (3) The comparative patent does not consider the tongue that may exist at the connection between the main pipe 10 and the branch pipe 11, but directly uses the lead-out end of the fiber bundle 14, the reserved end and lead-out end of the fiber bundle 15, and the reserved end of the fiber bundle 16. Braiding the branch pipe 11 at the end will cause distortion of the flower joint at the heel, which will affect the connection performance between the branch pipe 11 and the main pipe 10

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