“Chip-guide drilling” – a new high-efficiency non-stop drilling method

In drilling, chip clogging stands as a major obstacle. For suppression, technologies such as pecking/high-pressure coolants are utilized. However, they have disadvantages, e.g., low efficiency/high energy consumption, respectively, and higher efficiency is required for deep holes. In this paper, a new high-efficiency non-stop drilling method is proposed by suppression of chip clogging through generation of straight/continuous chips via guide grooves. Moreover, the flute volume can be decreased because of these chips, resulting in increased drill strength; efficiency can be increased even more. Experiments against aluminum/copper alloys are conducted to verify the proposed method.