| The competitiveness and the survival of manufacturing industries depend mainly on the quality of the products, the productivity, without forgetting the safety and the health of the operator. These performance indices are related to the operating conditions used.;The traditional method of machining is the use of cutting conditions fixed (feed rate, cutting speed), which limits productivity in the cases where the emphasis is on quality of the final part or reduces the quality of the piece when focusing on productivity.;The acoustic emission resulting from the cut also varies according to the cutting parameters. A suitable choice of the cutting conditions must satisfy the productivity, quality standards while respecting the environment and the health of the operator.;The acoustic emission resulting from the cut also varies according to the cutting parameters. A suitable choice of the cutting conditions must satisfy the productivity, quality standards while respecting the environment and the health of the operator. But it is noticed that the health of the operator is rarely taken into account during the optimisation of the production.;This work proposes a method of adaptive control of the cutting force and acoustic emissions in order to improve the quality and the productivity during milling.;An analysis of the sources of noise and mechanism of variation of the cutting pressures made it possible, in this work, to show experimentally that there is a correlation between the frequency of teeth passage, the cutting conditions, the cutting pressures and the acoustic emissions during milling.;This result made it possible to develop a model of variation of the cutting conditions in order to reduce the impact of the shock created by the tooth at the time of its entry in the matter, involving at the same time a significant reduction in the cutting forces and generated noise.;A model of state equations of the vibrations of the piece-tool system is also presented in annex. |
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