Since the impact performance of a drill is the main parameter for determining the drilling efficiency, study of the impact performance of a drill has a crucial influence on its productivity. As the impact energy of a rock drill is an important characteristic to evaluate its performance, many researchers have proposed various methods of measuring impact energy in order to evaluate it accurately.
Evaluating the impact performance of a rock drill by their methods requires a standardized rock sample in advance. Therefore, it is difficult to apply them to the performance test of a rock drill in batch production processes.
Yang Un Hyok, a section head at the Faculty of Mining Engineering, proposed a new structure of measuring device for estimating the impact energy of a percussive drill and analyzed its characteristics.
In the newly proposed measurement device, the maximum value of the pressure wave generated by the impact of 33-56J is approximately linear, with a range of 12-15MPa. It is shown that the error in the new proposed measurement device is less than 5% when the oil temperature is 10-70℃, air content is less than 2% and oil leakage is 10%.
The results of the study show that the proposed device ensures high measurement accuracy and significantly reduces damage to the sensor.
For more information, please refer to his paper “Influence of Oil Temperature, Air Content and Leakage in Hydraulic Measuring Device for Estimating Impact Energy of Rock Drill” in “Proceedings of KUTIC-2025”.