基于轴向运动悬臂梁理论的无缝内衣机织针横向振动特性

无缝内衣机织针轴向运动过程中的横向振动特性与编织机构性能密切相关,为解决织针轴向运动过程中横向振动的理论及仿真模型少、编织过程织针横向振动数据难测量等问题,通过将编织织针等效为轴向运动悬臂梁对其横向振动特性进行理论研究,并采用ANSYS仿真软件进行有限元计算,最后通过高速相机对编织织针的横向振动特性进行测试。实验结果显示:理论及仿真计算所得横向振动曲线及动态频率值一致,动态频率值最大偏差不超过3.84%;织针编织过程中存在横向振动,且所得频率值与理论及仿真计算结果一致,证明了理论及仿真建模的正确性。

Transverse vibration characteristics of knitting needles in seamless underwear machines based on axial movement cantilever beam theory

During the axial movement of the knitting needle in seamless underwear machines,the transverse vibration characteristics of the knitting needle are closely related to the performance of the knitting mechanism.However,there are few studies on the transverse vibration of knitting needles at this stage during the knitting process,hindering the improvement of stability of the seamless underwear machine in terms of vibration.In this paper,the vibration characteristics were theoretically studied with the knitting needle as an equivalence to an axially moving cantilever beam and the finite element calculation was carried out using ANSYS simulation software.The transverse vibration characteristics of the knitting needles were examined using a high-speed camera.The transverse vibration curve and dynamic frequency value calculated theoretically and by simulation demonstrates high level of resemblance with each other for the transverse vibration curve,and the maximum deviation of the dynamic frequency value is below 3.84%,The experimental results prove the existence of transverse vibration during the knitting process,and the frequency value obtained is consistent with the theoretical and simulation results,which implies the correctness of the theoretical and simulation modeling.