数控机床空间误差球杆仪识别和补偿

提出了多轴机床空间误差的球杆仪识别方法和补偿技术。建立了机床刀尖相对工件的空间误差的误差参数模型；给出了在机床工作空间中三个互相垂直的平面内，用球杆仪测量圆周运动的半径误差结合机床的空间误差模型识别定位、直线度、角度、垂直度和反向间隙等误差参数的方法。补偿试验结果证明该误差识别与补偿方法省时有效。

ERROR IDENTIFICATION AND COMPENSATION OF CNC MACHINING CENTERS USING RENISHAW BALL BAR

An efficient method is proposed for the identification of motion error sources involved in CNC machine tools by Renishaw ball bar, which is characterized by low cost simplicity of setup, and quick measurements. A volumetric error model, which was expressed functions of the tool location and its elemental errors, is developed. A method by combining the measured radial data performed on the three orthogonal panes in the machine work zone with the volumetric error models to identifying parametric errors such as positional, straightness, angular, squareness, and backlash errors is given in detail. The results from the experimental tests of error compensation of a CNC machine, which uses the error data obtained by the proposed identification method, show that the method is feasible and accurate.