Browsing by Author "Kaftanoǧlu,B."

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Citation - Scopus: 2
An Environmentally Friendly Method of Cutting and Forming of Materials by Boron Nitride Coated Tools
(Inderscience Publishers, 2014) Kaftanoǧlu,B.; Dökmetaş,N.; 01. Atılım University
To decrease the undesirable effects on global warming and environmental pollution, manufacturing techniques should aim to use less energy, generate less pollution to the environment and aim at higher performance in shaping and cutting materials. In this paper, a new coating technique is presented for cutting and forming tools so that they can withstand higher temperatures, preserve their surface quality and cutting edge longer and require minimum quantity of lubrication (MQL) and achieve a longer life. It is known that coolants used in manufacturing cause environmental problems and their processing raises the manufacturing cost. Therefore, MQL or dry cutting is preferred if the tool material can withstand the high temperatures. A new technology of boron nitride (BN) coating using a physical vapour deposition (PVD) system is developed. BN coatings are applied on cutting tools and forming dies. Experiments and industrial applications show an increase in tool life. MQL and manufacturing at higher temperatures can be used due to the stability of BN. Copyright © 2014 Inderscience Enterprises Ltd.
Citation - Scopus: 20
Micro Textured Cutting Tool Effects on Cutting Forces, Volumetric Wear and Adhesion in Dry Turning of Titanium Alloy
(Inderscience Publishers, 2019) Patel,K.; Kaftanoǧlu,B.; Özel,T.; 01. Atılım University
There are several distinct advantages offered by micro-textures applied to cutting tool surfaces to reduce forces, friction, and wear. This study provides investigations on micro-grooves fabricated on the rake face of tungsten carbide inserts (WC/Co) that were used in turning titanium alloy Ti-6Al-4V under dry conditions. Tool inserts included varying micro-groove width (50∼100 μm), depth (10∼30 μm) and spacing (15∼100 μm). In the experiments, a constant depth of cut and a cutting speed were used. The effect of micro-textured tool surfaces on cutting force and tool wear was found to be significant. © 2019 Inderscience Enterprises Ltd.
Citation - Scopus: 1
Wear Resistance Performance of Boron Nitride Coatings on End Milling Cutters
(Inderscience Publishers, 2017) Çetin,B.; Durkaya,G.; Kurtuldu,H.; Hacaloglu,T.; Gurbuz,M.; Kaftanoǧlu,B.; Department of Metallurgical and Materials Engineering; Information Systems Engineering; 15. Graduate School of Natural and Applied Sciences; 06. School Of Engineering; 01. Atılım University
For defence industry applications, the machining of ultra-high strength steels or aluminium with ballistic temper grades is a widely-used operation. Therefore, it is a great challenge to find an optimum solution for tool wear. In that sense, tool coatings provide various solutions for machining of hard materials or improving wear resistance. A cost-effective tool coating provides longer tool life, hence decreases the tool cost contribution in production. Boron nitride (BN) coating could be thought as a new generation coating method compared to titanium nitride (TiN), aluminium titanium nitride (AlTiN) or silicon aluminium oxy-nitride (SiAlON). BN coating material has a great strength, toughness and chemical stability whereas it has an important disadvantage of high intrinsic stress. In this industrial study, standard end mill cutters are coated with BN material by physical vapour deposition (PVD) method. The coated and uncoated milling tools are compared according to their wear resistance and the obtained workpiece surface roughness. First results of the study are presented in this paper. © 2017 Inderscience Enterprises Ltd.