摘要
数控机床加工状态数据具有多样化、时序性的特征,导致数控加工变形精度较差等问题。基于此,提出基于多维度控制的数控加工变形控制方法。采用自回归平均模型以及多维时间序列状态模型,对数控机床加工变形参数进行采集,判断数控机床加工状况间整体差异性。在获取的数控加工变形参数基础上,使用直线运动补偿以及圆弧运动补偿,实现三维空间内多方向运动补偿,在插补点坐标基础上原坐标不变的情况下,获得加工变形后数控机床应补偿量,实现多维度控制的数控加工变形控制。实验结果表明:采用该方法可实现高精度、全方位的数控加工变形控制,鲁棒性较好。
To improve the poor accuracy of NC machining deformation caused by diversity and timing of machining state data of NC machine tools,a method of NC machining deformation control based on multi-dimensional control was proposed.By auto-regressive average and multi-dimensional time series state models,the machining deformation parameters of CNC machine tools were collected to judge the overall difference between the machining conditions of CNC machine tools.Based on the acquired deformation parameters of NC machining,linear motion and arc-motion compensations were used to achieve multi-directional motion compensation in three-dimensional space.On the basis of interpolation point coordinates,when the original coordinates remain unchanged,the compensation amount of NC machine after machining deformation was obtained to realize multi-dimensional control of NC machining deformation.The results show that the proposed method can achieve high precision and omni-directional NC machining deformation control with good robustness.
作者
吴艳芳
高鹏
WU Yanfang;GAO Peng(Zibo Technical College,Zibo 255000,China)
出处
《机械制造与自动化》
2021年第3期149-152,共4页
Machine Building & Automation
关键词
数控加工
多维时间序列
多维度控制
变形参数
变形控制
误差补偿
CNC machining
multi-dimensional time series
multi-dimensional control
deformation parameters
deformation control
error compensation
