【摘要】 建立了数控机床空间误差预报的多项式模型,该模型把机床的空间误差表示为机床运动坐标的多项式函数;提出了用激光球杆仪直接测量机床空间误差的方法;由机床工作空间有限定位点误差的测量数据,利用最小二乘法来决定误差预报模型的系数。在XK713数控加工中心上进行了误差的多项式建模和补偿实验,结果表明本误差预报和补偿方法省时,效果显著。更多还原

【Abstract】 In this paper, to predict the volumetric errors of multiaxis CNC machining centers at any point in the workspace, a quadratic model is proposed. A novel method is developed to measure directly the volumetric errors in machine tools using a laser ball bar. A method for estimating the coefficients of the model from the measured errors in the workspace is given. Software based error compensation is tested on a CNC machine, and results demonstrate the effectiveness of the error prediction and compensation.更多还原