ACOUSTIC EMISSION ENERGY PARAMETERS AT COMPOSITE TOOL WEAR WITH A NOT CONTROLLED CUTTING DEPTH
Filonenko Sergey, National Aviation University (1 Kosmonavta Komarova Av., 03068 Kyiv, Ukraine)
Urgency of the research. The control and monitoring of cutting tool condition is one of the problems quality assurance items, which are produced by materials machining methods. The special value this problem has at composite materials machining, for which extremely dangerous are the surface defects.
Target setting. For solution this problem the different methods will be used, one of which is the acoustic emission method. However acoustic emission parameters depend on large number factors. For estimation of their influencing value have the analytical investigations with definition of acoustic emission parameters change legitimacies. The outcomes of such researches are the basis in mining verification and monitoring methods of composite materials machining technological processes.
Actual scientific researches and issues analysis. Many scientists from all over the world researches of influencing cutting tool wear on acoustic emission for solution the problem of quality assurance items at composite materials machining.
Uninvestigated parts of general matters defining. The most capacious parameters of acoustic radiation is the acoustic emission signals energy. Simulation of acoustic radiation energy at transition from normal to worn treating tool (from composite material) condition, definition influencing wear on acoustic emission signals energy parameters at composite materials machining introduces not only scientific, but also practical concern.
The research objective. In this paper, the researches of influencing treating tool wear from composite materials on acoustic radiation energy parameters are carried out at composite materials machining with not controlled cutting depth for a case of prevailing mechanical destruction its surface layer.
The statement of basic materials. The simulation of acoustic radiation energy at tool wear from composite material for a case of composite material machining with a not controlled cutting depth is conducted. It is shown, that the increasing of tool wear is accompanied by decreasing of acoustic radiation energy parameters. The statistical energy parameters of acoustic emission signals are determined at increasing of tool wear. It is shown, that the most sensing acoustic radiation energy parameter is the acoustic emission signals energy average level dispersion.
The researches have shown that the ascending of tool wear results in decreasing all acoustic emission energy parameters. However percentage decreasing of acoustic emission energy average level advances percentage decreasing of energy average level and its standard deviation. Such regularity is conditioned by that decreasing of acoustic emission energy parameters at decreasing the treated composite material destruction area advances ascending acoustic emission energy parameters at increase of treating composite material wear. The obtained outcomes can be used at mining verification, monitoring and control methods of composite materials machining technological processes.
acoustic emission, composite material, energy, machining, wear, statistical characteristics
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