Abstract:The swing angle accuracy is a key factor which strongly affects the machining performance of five-axis CNC machine tools and accurate measurements of the geometric error. This study measured the geometric swing head error of a five-axis CNC machine tool designed for machining aero-engine casings to verify the accuracy. This paper described a machine tool structure with a single direct-drive swing head and measurements of the main geometric errors of the swing head, including the deviation from the spindle end-face to the rotational center of the A-axis, the deviation between the swing sector and the YZ plane, and the height difference between the spindle axis and the A-axis. Then, the swing angle positioning accuracy was measured with the related position error. A cutting test on a simulated aero-engine casing showed that the machine tool swing angle accuracy was sufficiently accurate to properly machine the casing. The methods presented in this paper provide a foundation for improving the machining accuracy of five-axis machine tools in industry.
王立平, 张世珍, 王冬. 单摆角五轴数控机床摆头几何误差测量与精度验证[J]. 清华大学学报(自然科学版), 2020, 60(4): 292-298.
WANG Liping, ZHANG Shizhen, WANG Dong. Geometric error measurement and accuracy verification of the swing head of a five-axis CNC machine tool with a single swing angle. Journal of Tsinghua University(Science and Technology), 2020, 60(4): 292-298.
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