In order to optimize the needle punching forming process of preform,the influence of parameters such as hook teeth depth,number of needles and needle punching density on the needle punching force and volume fraction of perform is investigated.Researches has shown that the needle punching force increases with the increase of hook teeth depth,number of needles and layer thickness,but the influence of needle arrangement and needling density is relatively small;The volume fraction of preform increases with the increase of needling density,and the number and arrangement of needles have little effect on the volume fraction of preform;The volume fraction of preform increases with the increase of the layer thickness,but when the hook teeth are all inserted into the preform during the needling process,the volume fraction of preform tends to stabilize.The research results can provide a reference for optimizing the needle punching forming process of high-performance composite components in aerospace and other fields.
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