双针床经编机间隔距离对纱线需求量的影响分析

Influence of interval distance of double-needle bed warp-knitting machine on yarn demand

为解决双针床经编机栅状脱圈板的间距造成纱线波动问题和分析栅状脱圈板间距与需纱波动量之间的内在联系,使用KEYENCEVW-6000型动态分析三维显微系统追踪双针床经编机成圈过程中织针和导纱针的位移曲线,分析双针床经编机梳栉摆动过程中的导纱针与织针的相互位置配置,并计算双针床经编机成圈机构整体需纱量的波动量。通过建立前针床成圈过程中成圈机件的几何模型,推导出梳栉摆幅和脱圈板间距的函数关系,得出需纱波动量与栅状脱圈板间距之间的线性关系模型。实验结果表明二者之间具有良好的线性关系,设计的具有双倍补偿能力的活动杆式张力杆,可有效减少编织过程中纱线波动的问题。

In order to solve the yarn fluctuation caused by the interval distance of the double-needle bed warp-knitting machine, the intrinsic correlation of interval distance and the fluctuation of the yarn demand was analyzed. The displacement curves of the knitting needles and the guide needles in the process of forming a double-needle bed warp-knitting machine were tracked by using the KEYENCE VW-6000 dynamic analysis three-dimensional microscope system, the collocation of guide needle and knitting needles was analyzed, and the whole yarn demand fluctuation in the knitting area of the warp-knitting machine was calculated. A geometrical model of the coil parts in the process of the front needle bed knitting loop-forming was established. The function relation between the swing amplitude of guide bar and knocking-over bar was deduced. Then, the linear relation model between the integral yarn-demand fluctuation of the double-needle bed warp-knitting machine and the spacing of the knocking-over bar was obtained. Finally, a kind of movable rod tension bar with double compensation capability was designed, which can effectively reduce the yarn fluctuation during knitting.