Patent ID: 6640205
Filing Date: 2003-10-28
Classification: B25D,E21B,G01V,Y10T

Abstract:
A method of investigating and identifying the nature of a material, to be worked and for making available at least one operating parameter for the optimized pre-setting of a hammer drill, comprising the steps of:detecting a shock wave generated or induced in the drill, before or at the beginning of or during a working process; measuring the shock wave signal; algorithmically analyzing the shock wave signal; algorithmically evaluating at least one distinguishing feature (M1 to M4), characteristic of the material, from the shock wave signal, for classifying the material; determining the at least one distinguishing feature for characterizing the drill over the shock wave and the material; and on-line setting at least one of the operating parameters comprising â€œimpact frequencyâ€ , â€œindividual impact energyâ€  and â€œrpmâ€ .