A modified vertical braiding machine and closed annular axis mandrels with a special-shaped cross section were used to braid annular axis preforms under four different technical parameters. After measuring the braiding angles and yarn spacing of the braided preform in different areas of the mandrels, it was found that the braiding angle increased by 20.9% and the yarn spacing decreased by 19.8% when the speed of the yarn carrier was doubled. The braiding angle decreased by 31.1% and the yarn spacing increased by 28.6% when the rotation speed of the mandrels was doubled. The results show that the rotation speed of the mandrel has a slightly greater influence on the braiding angle and the yarn spacing. By using the modified braiding machine to braid the annular axis preforms, multi-layer continuous braided preforms can be achieved on compact equipment. And the structure of the annular axis braided preforms can be changed by changing the technical parameters.

中文翻译：

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工艺参数对环形轴编织预成型坯结构的影响

在四个不同的技术参数下，使用一种改进的立式编织机和具有特殊形状横截面的封闭环形轴心轴编织环形轴坯。测量心轴不同区域的编织预成型件的编织角和纱线间距后，发现当载纱速度提高一倍时，编织角增加20.9％，纱线间距减少19.8％。当心轴转速加倍时，编织角减少31.1％，纱线间距增加28.6％。结果表明，芯轴的旋转速度对编织角和纱线间距的影响稍大。通过使用改进的编织机编织环形轴预成型坯，多层连续编织的瓶坯可以在紧凑的设备上实现。环形轴编织预成型坯的结构可以通过改变技术参数来改变。