期刊
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
卷 54, 期 5-8, 页码 479-488出版社
SPRINGER LONDON LTD
DOI: 10.1007/s00170-010-2976-9
关键词
High-speed machining; Milling; Thin wall; Chatter; Time domain simulation
资金
- Basque Country Government
- CIC MARGUNE developed under the ETORTEK program
- Spanish Ministry of Science and Technology
- MICYT [DPI2002-04167-C02-01]
- French Region Midi-Pyrenees Project 'Complex workpiece machining in aeronautical context'
The aim of this study is to evaluate the modelling of machining vibrations of thin-walled aluminium workpieces at high productivity rate. The use of numerical simulation is generally aimed at giving optimal cutting conditions for the precision and the surface finish needed. The proposed modelling includes all the ingredients needed for real productive machining of thin-walled parts. It has been tested with a specially designed machining test with high cutting engagement and taking into account all the phenomena involved in the dynamics of cutting. The system has been modelled using several simulation techniques. On the one hand, the milling process was modelled using a dynamic mechanistic model, with time domain simulation. On the other hand, the dynamic parameters of the system were obtained step by step by finite element analysis; thus the variation due to metal removal and the cutting edge position has been accurately taken into account. The results of the simulations were compared to those of the experiments; the discussion is based on the analysis of the cutting forces, the amplitude and the frequency of the vibrations evaluating the presence of chatter. The specific difficulties to perfect simulation of thin-walled workpiece chatter have been finely analysed.
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