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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2008

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Influence of temperature and microstructure of the workpiece material on energy quanta in cutting process

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Kisin M. , Noc Razinger M. , Pusavec F. , Kopac J.

Journal of Achievements in Materials and Manufacturing Engineering

2008

tom Vol. 30, nr 1

75-78

Purpose: of this paper is on-line identification of the machinability based on the theory of energy quanta power spectra of the measured signal of the cutting force. Identification method is supported by measurements of the instantaneous temperature in the cutting zone for workpieces with the same chemical composition but different microstructure and mechanical properties. Design/methodology/approach: For measuring the temperature in the cutting zone the direct IFT (Instantly Formed Thermo element) method was used. Findings: Low carbon steel with a previously cold-deformed microstructure has a better machinability in lower cutting force, smaller energy quanta and lower temperature in the cutting zone as low carbon steel with the normalized microstructure. Research limitations/implications: The theory of energy quanta as a basis for on-line identification of cutting parameters for optimization and adaptive control of the cutting process in the industry praxis is not yet in use. But it was developed in laboratory research up to the stage when testing in the industry is already possible, where are because of high productivity the demands on work load of machines and the quality of final products much higher. Originality/value: The method on-line identification on the theory of energy quanta used for that has to be accomplished in real time and has to have the required reliability. The choice of the measured parameter has to be suitable and relevant.