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<p>Needled preforms offer alternatives for developing composite fields, and the needling device is essential for preparing preforms. This study proposes a needling device for the preparation of thin-walled cone preforms. A needling mechanism and a mechanism for adjusting the height and tilt angle of the core mold are combined to prepare preforms. The tilt angle adjustable mechanism is analyzed kinematically and dynamically, and after optimization, the load change rate of the mechanism decreased by 47.7 %. A method is offered to create the profiled needle plate, which is to unfold the side of the cone surface into a plane to arrange the needle hole locations and then fold it back to the cone surface. The needle plate design serves to maintain uniform needling depth and boost needling efficiency. The stitch simulation can meet the design requirement by 100 %. This study has some implications for innovative needling device design and application.</p>

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Design and study of needling device for conical thin-walled carbon fiber preforms

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Zhengyu An,
  • Lei He,
  • Yage Du,
  • Benfengnian Dong,
  • Xuejie Liu

摘要

Needled preforms offer alternatives for developing composite fields, and the needling device is essential for preparing preforms. This study proposes a needling device for the preparation of thin-walled cone preforms. A needling mechanism and a mechanism for adjusting the height and tilt angle of the core mold are combined to prepare preforms. The tilt angle adjustable mechanism is analyzed kinematically and dynamically, and after optimization, the load change rate of the mechanism decreased by 47.7 %. A method is offered to create the profiled needle plate, which is to unfold the side of the cone surface into a plane to arrange the needle hole locations and then fold it back to the cone surface. The needle plate design serves to maintain uniform needling depth and boost needling efficiency. The stitch simulation can meet the design requirement by 100 %. This study has some implications for innovative needling device design and application.