Effect of twist drill bit features on drilling energy

Drilling operations are very important with an application rate of approximately 35% among all machining operations. The force, power and energy required for drilling are affected by factors such as drill diameter, drilling parameters, drill bit type, workpiece material. Most of the energy required for machining is converted into heat energy during the process. Heat is released due to the friction of the drilling bit with the chip and the workpiece. Due to this friction, tool wear also occurs. There are very few studies in the literature that reveal the relationship between tool temperature and tool wear. This study was carried out to reveal the relationship between cutting tool temperature and tool wear. In this article, the force, energy (power) required to drill steel and aluminum workpieces with different types of twist drill bits has been determined. Three types of 8 mm and 10 mm diameter twist drill bits (polished, rolled and TiN coated) were used for drilling. Drill tip temperatures were determined at the exit of the hole during the drilling process and the wear values of the drill bits were measured, and the relationship between tool temperature and tool wear was revealed.