Abstract
Based on their favourable mechanical features, applications of ceramics are continuously spreading in industrial environment. Such a good feature is their resistance against heat shock, so, currently they are applied e.g. as coating material for gas turbines. The paper proposes an indirect method for supervision of the cutting tool wear in the optimisation of a micro-milling process of ceramics. It replaces the expensive and time consuming measurement of the cutting tool wear in which the experiment have to be stopped, the tool has to be taken from the machine and it has to be measured e.g. by microscope. The replaced measurement has also the disadvantage that the tool has to be positioned (again) when putting it back to the machine bringing also inaccuracies to the machining. Experiments show that the proposed novel technique allows monitoring the tool wearing process characteristics without measuring the tool directly, even if the applied indirect measurement (on the workpiece) incorporates some inaccuracies. The introduced methodology supported the ceramics milling technology optimisation according to tool live and machining process time, simultaneously.
Highlights
There is an increasing trend using ceramics in the application areas where high hardness and thermal resistance are faced [1]
The introduced methodology supported the ceramics milling technology optimisation according to tool live and machining process time, simultaneously
Indirect measurement and supervision The cutting process removes a special part of the ceramics coating on the workpiece having a prescribed geometry
Summary
There is an increasing trend using ceramics in the application areas where high hardness and thermal resistance are faced [1]. The energy industry takes advantage of this trend, e.g. gas turbines are applied for producing electric energy with the aim to reach the highest efficiency through coating the turbine blade surfaces with ceramics. The weak points of these technologies are their complexity, they are expensive and their long machining time.
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