This paper deals with the optimization of technological parameters (such as discharge voltage, current amplitude, time of impulse) to improve a dimensional accuracy of high aspect ratio holes obtained by using electrical discharge drilling (EDD). High aspect ratio holes characterize aspect ratio length to diameter of hole above 10 and diameter less than 1 mm. Due to drilling the holes included difficulties, especially in case applying difficult–to–machine materials as workpiece. In the first part of the article, based on the results analysis of experimental research, a mathematical model is developed. The second part of the study presents the results analysis of method prediction of selected process parameters which influence the technological factors such as linear tool wear, material removal rate and conicity angle.
Nowdays the measurements with using of a thermal camera are more and more applied. The thermal-imaging technique can be included into the diagnostic methods such as roentgenography, ultrasonography, computer tomography, magnetic resonance. The thermal–imaging technique gives the possibility of measurement by using of emitted infrared rays from human body. In the paper the results analysis of experimental research contains the temperature field of the hand dorsum are presented. The results of analysis demonstrate possibility detecting of asymmetrical changes which indicate e.g. beginning of diseases (without presenting of any symptoms).