• FLANK WEAR OF SURFACE TEXTURED TOOL IN DRY TURNING OF AISI 4140 STEEL

    Machines. Technologies. Materials., Vol. 13 (2019), Issue 2, pg(s) 93-96

    Surface texturing on a cutting tool is a process which can provide reduction in friction, improved performance of a contact interface and a better tool life. In this paper, influence of surface texturing on tool wear of both textured and non-textured tools were compared. Different textures were applied on coated carbide tools by Femtosecond laser to enchance the wear resistance. Dry cutting experiments on AISI 4140 (32 HRC) were carried out with conventional cutting inserts having parallel and perpendicular textured sufaces to the cutting edge on the flank face. Finally, results showed that surface texturing of cuttting insert was found to be beneficial to the decrease of the flank wear.

  • AN EXPERIMENTAL STUDY ON CUTTING FORCES AND SURFACE ROUGHNESS IN MQL MILLING OF ALUMINUM 6061

    Machines. Technologies. Materials., Vol. 13 (2019), Issue 2, pg(s) 86-89

    The minimum quantity lubrication (MQL) and dry machining operations are two types of environmentally friendly processes that have potentials to replace with conventional cooling methods. In recent years, the studies have been performed on the environmentfriendly lubrication methods such as MQL method in machining operations. These studies have also focused on the usage of vegetable cutting fluids instead of mineral based oils due to increasing awareness to the environment and human health. In this experimental study, Aluminum 6061 was machined under dry and MQL conditions and the cutting force components and surface roughness values were measured. The experiments were carried out by CNC milling machine tool at three different cutting speeds and constant depth of cut and feed. The vegetable cutting fluid was pulverized to the rake face by using single nozzle and double nozzles at two flow rates during MQL milling. Cutting force components and surface roughness values were compared for minimum quantity lubrication and dry milling operations of Aluminum 6061.