The Influence of Internally Cooled Drill Bits on Cutting Dynamics and Workpiece Hardness Monitoring in Stone Machining

• DOI: 10.3390/machines11111010
• Publication Date: 2023-11-05T12:35:06Z
• Authors: Miho Klaić; Danko Brezak; Matej Šlankovič; Tomislav Staroveški
• Keywords: Drill bit; Bit (key)

Drill bits with internal cooling capabilities are still not employed in stone machining practices within shop floor environments. Therefore, a conventional industrial drill bit used was subject to redesign wherein an axial channel machined throughout its body. A comparison drawn between the standard without and redesigned bit, which compressed air as medium. The experiment performed by drilling three types of samples varying hardness nine combinations cutting speed feed rate. During process, two process signals were continuously measured—namely, forces vibrations. Additionally, edges inspected after specific number cycles using vision system. primary objective this study compare tool wear dynamics achieved those bits. Furthermore, usage vibration classification during internally cooled additionally analyzed. results unveiled improvement minimizing forces, vibrations, intensity when utilizing bit. Even though system generally exhibited lower again demonstrated commendable efficacy classifying hardness.