A three-dimensional braided leaf spring preform and its braiding process
A preform, three-dimensional weaving technology, applied in the field of automotive leaf springs, can solve the problems of interlayer failure, low shear strength, composite material structure damage, etc., to achieve safety assurance, reduce the use of components such as links, and overall performance improved effect
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Embodiment 1
[0037] Such as Figure 1-Figure 2 As shown, this embodiment provides a three-dimensional braided leaf spring preform for automobiles, including a main body 2, a first roll ear 1 and a second roll ear 6, and the first roll ear 1 and the second roll ear 6 are respectively located at The two ends of the main body 2 are integrated with the main body 2 for weaving.
[0038] In this solution, not only the first ear 1 and the second ear 6 are integrally woven with the main body 2, but the main body 2 itself is also integrally woven. In a further solution, the middle part of the main body 2 has an enlarged part 5 , the thickness of the enlarged part 5 is greater than the thickness of both ends of the main body 2 , and the enlarged part 5 and the main body 2 are integrally woven.
[0039] Therefore, the present invention realizes the joint weaving of the coil ears on both sides of the leaf spring and the two parts of the main body of the leaf spring, as well as the weaving of the two ...
Embodiment 2
[0042] This embodiment provides a weaving process for a three-dimensional braided leaf spring preform for automobiles, comprising the following steps:
[0043] (1) Weaving of the first roll ear 1: according to the size of the first roll ear 1, arrange the required number of fibers into an array m*n, and reserve a certain length of fiber at the top of the first roll ear 1 for the second For the weaving of the first roll ear 1, after the first roll ear 1 is knitted, the reserved fibers are folded back to participate in the weaving of the main body 2.
[0044] Specifically, according to the size and thickness of the first roll ear of the selected leaf spring, calculate the required number of fibers, arrange the fibers on the three-dimensional weaving base according to m rows and n columns, at the top end when the roll ear starts to weave, Reserve fibers that are greater than or equal to the length of the entire leaf spring, and weave the ears first. After the length direction of ...
Embodiment 3
[0056] This embodiment provides a weaving process for a three-dimensional braided leaf spring preform for automobiles, which specifically includes the following steps:
[0057] Step (1), weaving of the first ear: According to a leaf spring of a certain size, 6 rows and 16 columns (96 pieces) of 12K carbon fiber are calculated as the first ear weaving. Before weaving the first ear, in the first ear 2 meters of carbon fiber are reserved at the top for subsequent weaving of the main part of the leaf spring. After the weaving of the first roll ear is completed, the carbon fiber reserved on the top of the first roll ear is folded back to participate in the weaving of the main part of the leaf spring.
[0058] Step (2), weaving of the main body: the number of fibers in the main part of the leaf spring requires 12 rows and 22 columns of 12K carbon fibers, a total of 264 carbon fibers, greater than 96*2=192 carbon fibers, 264-192=72, in three-dimensional weaving The equipment needs t...
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