An Investigation of the use of Cutting Tests to Assess the Performance of Lathes
Cutting tests have been performed by ICPMUA, Bucharest, in a controlled manner according to the recommendations in an MTIRA report1, on ten centre lathes of 400 mm swing, ten centre lathes of 500 mm swing and ten vertical lathes. None of the machines tested was new, but all were of approximately the same age. Receptance measurements were also made on twelve of the centre lathes.
In the case of centre lathes a large variability between nominally identical machines was evident—up to 76 per cent in the results for turning tests on small workpieces, and the results of different tests (parallel-turning, facing, etc.) placed the machines in different orders; no one test could be identified as generally giving results representative of machine quality. With vertical lathes the variability was more difficult to assess since chatter was difficult to achieve, and it was again difficult to identify any one type of test as giving representative results.
It is concluded that further work is necessary, on a number of machines, to determine to what degree the results of any particular cutting test is representative of machine quality.
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- 1.B. J. Stone (1971). A dynamic performance test for lathes. MTIRA, MacclesfieldGoogle Scholar