Simplified Map-based Selection of Optimal Spindle Speeds When Milling Complex Structures
In the paper a method for selecting optimal spindle speeds for complex structures during milling operations is presented. It is based on the selection of the spindle speed in accordance with a simple equation resulting from the minimisation of vibration energy, which leads to the minimisation of the work of cut-ting forces presented in previous elaborations by the authors . Optimal spindle speeds are obtained for many points selected on machined surface thanks to the results of the modal test. The effectiveness of the proposed method is verified based on the results of experimental research. Reduction of vibration level, improvement of surface quality and reduction of milling time were obtained.
KeywordsFace milling Vibration surveillance Optimal spindle speed
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The research was carried out as a part of tasks financed by the Polish National Centre for Research and Development, project TANGO1/266350/NCBR/2015, on “Application of selected mechatronic solutions for supervising the machining of large-size work-pieces on multi-axis machining centres”.
Experimental investigations on the MIKROMAT 20V portal machining centre were made thanks to cooperation with PHS HYDROTOR S.A. in Tuchola, Poland.
- 3.Tomkow J.:. Vibrostability of machine tools; The Scientific and Technical Publication: War-saw. Poland (1997) (in Polish).Google Scholar
- 5.Kalinski K. J., Mazur M. R., Galewski M. A.: High speed milling vibration surveillance with the use of the map of optimal spindle speeds, Proceedings of the 8th International Conference on High Speed Machining, ENIM, Metz, 300-305 (2010).Google Scholar
- 11.Liao Y. S., Young Y. C.: A new on-line spindle speed regulation strategy for chatter control. International Journal of Machine Tools & Manufacture 35(6), 651-660 (1996).Google Scholar
- 12.Tarng Y. S., Lee E. C.,: A Critical Investigation of the Phase Shift Between the Inner and Outer Modulation for the Control of Machine Tool Chatter, International Journal of Machine Tools & Manufacture. 37, 1661–1672 (1997).Google Scholar
- 15.Sarhan A. D., Besharaty S. R., Akbaria J., Hamdi M.: Improvement on a CNC Gantry Machine Structure Design for Higher Machining Speed Capability. World Academy of Science, Engineering and Technology. International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering. 9, 534–538 (2015).Google Scholar
- 16.Heylen W., Lammens S., Sas P.: Modal analysis theory and testing. KU Leuven; (2007).Google Scholar
- 17.Galewski M.A.: Application of the LabView Environment for Experimental Modal Analysis Support. In: From Finite Elements Method to Mechatronics, Eds. K. J. Kaliński, K. Lipiński, The Publication of Gdansk University of Technology, Gdansk, 105-118 (2017) (in Polish).Google Scholar