Prediction and identification of rotary axes error of non-orthogonal five-axis machine tool |
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| Affiliation: | 1. College of Engineering, Nanjing Agricultural University, Nanjing 210031, China;2. Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK;1. The State Key Lab of Fluid Power Transmission and Control, Department of Mechanical Engineering, Zhejiang University, Room 123, Teaching building No.1, Yuquan Campus, Hangzhou 310027, China;2. School of Mechanical and Manufacturing Engineering, The University of New South Wales, NSW 2052, Australia;1. Institute for Machine Tools and Manufacturing (IWF), ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland;2. Reiden Technik AG, Werkstrasse 2, 6260 Reiden, Switzerland;3. inspire AG, Technoparkstrasse 1, 8005 Zurich, Switzerland |
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| Abstract: | This paper proposes an efficient and automated scheme to predict and identify the position and motion errors of rotary axes on a non-orthogonal five-axis machining centre using the double ball bar (DBB) system. Based on the Denavit-Hartenberg theory, a motion deviations model for the tilting rotary axis B and rotary C of a non-orthogonal five-axis NC machine tool is established, which considers tilting rotary axis B and rotary C static deviations and dynamic deviations that total 24. After analysing the mathematical expression of the motion deviations model, the QC20 double ball bar (DBB) from the Renishaw Company is used to measure and identify the motion errors of rotary axes B and C, and a measurement scheme is designed. With the measured results, the 24 geometric deviations of rotary axes B and C can be identified intuitively and efficiently. This method provides a reference for the error identification of the non-orthogonal five-axis NC machine tool. |
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| Keywords: | Non-orthogonal five-axis NC machine tool Tilting rotary axis Denavit-Hartenberg motion deviations Identification algorithm |
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