造纸过滤筛钻铣数控机床模糊控制算法设计

Design of Fuzzy Control Algorithm for Drilling and Milling NC Machine Tool of Papermaking Filter Screen

造纸过滤筛的加工质量直接影响了造纸工艺的进度与效率,为实现造纸过滤筛的精细化机械生产,提出造纸过滤筛钻铣数控机床模糊控制算法。根据造纸过滤筛钻铣数控机床的工作原理与元件组成,构建数控机床结构模型。依照造纸过滤筛的规格要求,规划钻铣刀具的加工轨迹和强度。利用硬件设备,实时采集造纸过滤筛钻铣数控机床工作信号。从结构、模糊控制量计算和反模糊化输出三个方面,设计并安装模糊控制器。以实时采集的工作信号为输入项,在模糊控制器的约束下,实现对钻铣数控机床刀具移动位置、速度以及钻铣力的模糊控制。通过性能测试实验得出结论:优化设计算法在位置、速度和钻铣力三个方面的控制误差分别为0.69mm、0.32m·min^(-1)和0.24N,均低于预设值,且造纸过滤筛加工产品中不合格阶梯孔数量明显下降。

The processing quality of paper-making filter screen directly affects the progress and efficiency of paper-making work.In order to realize the fine mechanical production of paper-making filter screen,a fuzzy control algorithm for drilling and milling NC machine tool of paper-making filter screen is proposed.According to the working principle and component composition of drilling and milling CNC machine tool for papermaking filter screen,the structural model of CNC machine tool is constructed.Plan the machining path and strength of drilling and milling tools according to the specification requirements of papermaking filter screen.The hardware equipment is used to collect the working signal of paper filter screen drilling and milling CNC machine tool in real time.The fuzzy controller is designed and installed from three aspects:structure,calculation of fuzzy control quantity and anti fuzzy output.Taking the real-time collected working signal as the input item and under the constraint of fuzzy controller,the fuzzy control of tool moving position,speed and drilling and milling force of drilling and milling NC machine tool is realized.Through the performance test experiment,it is concluded that the control errors of the optimization design algorithm in position,speed and drilling and milling force are 0.69 mm,0.32 m·min^(-1)and 0.24 N respectively,which are lower than the preset values,and the number of unqualified step holes in the processed products of papermaking filter screen is significantly reduced.