Assessment of possibilities of vibration signal quantification for the rock cutting process evaluation

摘要

Mechanical oscillations or vibrations arise in the rock cutting process due to mutual reactions of cutting tool and rock mass. A classical monitoring system provides scanning and recording of input variables of rock cutting process, such as the thrust, revolutions, power consumption and flush amount, and the net advance rate of tool in rocks as an output variable of the process. The measured data form a source for the calculation of the specific disintegration energy and the working ability of cutting tool, both serving as evaluation variables for the rock cutting process effectiveness. The monitoring system installed on the experimental drilling stand was adjusted to scan the vibration signals. The vibration signal was monitored during rotary drilling of andesite, granite and limestone samples with various cutting tools used and various thrust and revolutions levels applied. The results of vibration signal monitoring were processed and evaluated consequently. The paper presents an introductory analysis of vibration monitoring data. It proved it is possible to find relations between the input variables of rock cutting process and the variables characterizing the vibration signal. The outcomes have outlined a possibility of using the vibration signal for an evaluation or control of the rock cutting process.