Performance Characterization of Surface Quality and Tool Wear of Wet/Dry Drilling on Steels by Using Coated Drill Bits

• Main Authors: A. Bovas Herbert Bejaxhin, G. Paulraj
• Format: Article
• Language: English
• Published: Taiwan Association of Engineering and Technology Innovation 2019-04-01
• Series: Proceedings of Engineering and Technology Innovation
• Subjects: drilling; coating; surface roughness; tool wear
• Online Access: http://ojs.imeti.org/index.php/PETI/article/view/3597

The creation of holes by the drilling operation is a normal process which we were followed from the earlier days. Especially the drill bits’ usage is an Important consideration among the different drilling operations. Here we considered the coated form of drill bits for the purpose of improving the surface quality and to overcome the tool wear by the particulate deposition over the surface of the specimen. The drilling features are to find out over the specimen EN 8 Alloy steel and mild steel which are experimentally verified. In the view of differentiating the eminence of surface roughness and tool wear an appearance of Alloy steel and mild steel specimens, the wet and dry conditioned drilling operations are performed by the manifestation of coolants. The importance of Pertura and Latuma tool coated drill bits developed by the Physical Vapour Deposition (PVD) method are used for this operation. Based on the drilling conditions whether usage or non-usage of coolants is majorly influenced on surface roughness, and the tool coatings are politely influenced on the surface roughness of each specimen have been found out. Likewise, the tool coatings and the rotational speed influenced more on machining time has been recognized. Tool wear patterns are categorized and compared with the simulation data of drilling in Deform 3D. Effective stress is identified and related to the value of surface coarseness in both conditions of drilling on different steel specimens.