The Reliability and Value of Tests to Determine the Limitations of the Performance of Lathes Imposed by Self-Excited Vibration
Cutting tests have been carried out on a large number of lathes to establish whether or not the onset of self-excited vibration is a suitable measure of the limit of performance of lathes, and to assess the reliability of receptance measurements for the prediction of the onset of self-excited vibration. The measurements have been analysed using statistical techniques such as analysis of variance, multiple regression and multivariate normal analysis.
Results of large numbers of cutting tests show that the variability in the onset of self-excited vibration among nominally identical new machines varies between ±20 per cent and ±40 per cent. Little correlation has been established between the onset of self-excited vibration in practice and corresponding receptance measurements but, more important, test results suggest that the onset of self-excited vibration may not be a major limitation to the performance of lathes. Before standardised test procedures for assessing the performance of machine tools can sensibly be proposed, it will be necessary to establish from cutting tests the relative importances of different types of performance limitation for different types of machine and conditions of usage.
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- 1.B. J. Stone (1971). A dynamic performance test for lathes. MTIRA, MacclesfieldGoogle Scholar
- 2.A. El-Khatib, M. M. Sadek and S. A. Tobias (1974). Standardisation of dynamic acceptance tests for machine tools. Draft report, BirminghamGoogle Scholar
- 3.Baum and Heller et al. (1974). Problems of assessment of the dynamic behaviour of metalcutting machine tools. Industrie-Anzeiger, 96 (78)Google Scholar
- 4.A. Golder (1975). A statistical approach to machine tool testing. Proc. 16th Int. MTDR Conf., Macmillan Press, ManchesterGoogle Scholar
- 5.J. Tlusty and M. Polacek (1968). Experience with analysing stability of machine tools against chatter. Advances in Machine Tool Design and Research, BirminghamGoogle Scholar
- 6.G. Pendlebury, R. Lawther and J. I. Roberts (1971). An electrohydraulic vibrator. Advances in Machine Tool Design and Research, ManchesterGoogle Scholar
- 7.BAS tests (1972). Sveriges MekanförbundGoogle Scholar