Bagherzadeh, Amin and Kuram, Emel and Budak, Erhan (2021) Experimental evaluation of eco-friendly hybrid cooling methods in slot milling of titanium alloy. Journal of Cleaner Production, 289 . ISSN 0959-6526 (Print) 1879-1786 (Online)
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Official URL: http://dx.doi.org/10.1016/j.jclepro.2021.125817
Abstract
The positive effects of cutting fluids on the machinability performance are well known in machining
industry. However, it is also known that their use causes environmental and health problems. Moreover,
manufacturers are faced with strict environmental regulations in order to employ dry machining, which
is not efficient especially in machining of difficult-to-cut materials such as titanium alloys. Therefore,
machining industry developed alternative green machining solutions such as minimum quantity of
lubrication, vegetable based cutting fluids, cryogenics and hybrid cooling (combination of cryogenics and
minimum quantity of lubrication). Up to now, no work has been documented in the literature on
comparison of cryogenics and hybrid cooling with minimum quantity of lubrication. Furthermore, as no
information regarding the effects of hybrid cooling on workpiece temperatures during milling of titanium alloy is available, this research aims to demonstrate the feasibility of implementing cryogenics and
hybrid cooling method in slot milling of titanium alloy. Thus, the aim of this experimental study was to
determine the machining performance of titanium alloy under various green lubricating/cooling
methods. In order to do so, minimum quantity of lubrication, cryogenic cooling by spraying liquid nitrogen, cryogenic cooling by spraying carbon dioxide, simultaneous spraying of carbon dioxide and
minimum quantity of lubrication, and simultaneous spraying of liquid nitrogen and minimum quantity of
lubrication were applied during slot milling process under different cutting speeds. The performance of
these methods was evaluated by measuring tool wear, temperature, cutting forces and surface roughness. The results showed that the efficiency of cryogenic cooling was based on the cutting speed where
better results were obtained at higher speeds. It was also concluded that the simultaneous spray of
cryogenic fluid and minimum quantity of lubrication improved the machinability of titanium alloy as
compared to only spray of cryogenics because of both lubricating and cooling effects. In terms of environmental impact of machining operations, hybrid cryogenic methods offer an efficient solution to
improve the process sustainability towards cleaner production since the coolant volume is reduced
substantially compared to conventional cooling methods decreasing pollutants, and lung and skin diseases experienced by the workers in production facilities. Results showed that the combination of
cryogenic and minimum quantity lubrication method provided a balance between productivity and
environment. Hybrid method improved the productivity of milling process in terms of cutting speed, tool
life, and cost while increasing environmental protection and operator health and reducing material
waste.
Item Type: | Article |
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Uncontrolled Keywords: | Cryogenic cooling, Minimum quantity of lubrication, Titanium alloy, Tool wear, Temperature, Cutting force, Surface roughness |
Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ241-254.7 Machine construction (General) |
Divisions: | Faculty of Engineering and Natural Sciences > Academic programs > Industrial Engineering Faculty of Engineering and Natural Sciences |
Depositing User: | Erhan Budak |
Date Deposited: | 21 Aug 2021 17:24 |
Last Modified: | 19 Aug 2022 10:58 |
URI: | https://research.sabanciuniv.edu/id/eprint/41917 |