Geometric error measurement and accuracy verification of the swing head of a five-axis CNC machine tool with a single swing angle

WANG Liping; ZHANG Shizhen; WANG Dong

doi:10.16511/j.cnki.qhdxxb.2020.25.006

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Journal of Tsinghua University(Science and Technology) ›› 2020, Vol. 60 ›› Issue (4) : 292-298. DOI: 10.16511/j.cnki.qhdxxb.2020.25.006

MECHANICAL ENGINEERING

Geometric error measurement and accuracy verification of the swing head of a five-axis CNC machine tool with a single swing angle

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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.

Key words

geometric error of the swing head / five-axis CNC machine tool / error measurement / accuracy verification

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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[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(4): 292-298 https://doi.org/10.16511/j.cnki.qhdxxb.2020.25.006

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