基于MatLab的经编机钩针凸轮轮廓曲线反求设计

Reverse design used in crochet cam contour curve of warp-knitting machine based on MatLab

为设计并制造磨损的经编机钩针凸轮的替代品,提出一种新的反求设计方法,即利用三坐标测量仪测得磨损凸轮轮廓线上各点数据,在MatLab中将所采集的数据进行曲线绘制,通过进一步修正曲线,对数据进行重新筛选后,利用MatLab对新数据进行三次样条插值,再借助Excel将插值后的数据导入AutoCAD中生成可编辑的凸轮轮廓曲线,为数控编程提供依据。实际运行结果表明,由该方法加工出的凸轮满足生产工艺要求,振动小,噪音低,这种方法可为类似凸轮设计提供借鉴。

In order to design and manufacture a warp-knitting machine crochet cam to replace old one which is easy to wear, a new reverse design method is proposed by measuring the cam curve data by 3-D CMM, plotting the cam curve in MatLab, modifying the cam curve further, filtering the collected data, processing the filtered data by cubic spline interpolation in MatLab, and sending the new data to AutoCAD to generate compliable cam contour curve by Excel. The results of experiment show that the cam manufactured in this way satisfies production requirement, vibration decreases and noise declines, it can be used as reference for similar cam reconstruction.