Processing characteristics and lubrication performance of castor oil-ethanol blended coolant-based minimal quantity lubrication

This paper presents an experimental investigation on effects of pressure and nozzle angle of minimal quantity lubrication (MQL) on cutting temperature and flank wear in turning. In manufacturing industries, there are always demands for the optimum cutting conditions for the most economical manufacturing cost. Hence, reduction in tool wear is essential for less expenditure with the knowledge of optimum cutting conditions of MQL. MQL, also known as near dry machining, has been acknowledged as an effective cooling technique in machining by applying vegetable oils in replacing the conventional flooding method due to environmental issues. By varying the operating pressures and nozzle angle with respect to the cutting zone, cutting temperature and flank wear are measured using a calibrated tool work thermocouple and SPG video microscope. Comparison was made between dry cutting, water mist cooling and MQL method with palm oil. Results showed that MQL with palm oil exhibits best cooling efficiency at 5 bar pressure and nozzle angle of 20o with reduction of 35% in tool wear and 23% in cutting temperature at higher cutting speeds.

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Research on Minimal Quantity Lubrication of Cutting Oil in Turning (Effect of Quantity of Oil Supply)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.78.3630 ◽

2012 ◽

Vol 78 (794) ◽

pp. 3630-3641 ◽

Cited By ~ 1

Author(s):

Hironori MATSUOKA ◽

Hajime ONO ◽

Takahiro RYU ◽

Takashi NAKAE ◽

Shuuichi SHUTOU

Keyword(s):

Oil Supply ◽

Minimal Quantity Lubrication ◽

Minimal Quantity

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CFD Analysis and Experimental Investigation of Jet Orientation in MQL Machining

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.135.462 ◽

2010 ◽

Vol 135 ◽

pp. 462-466 ◽

Cited By ~ 4

Author(s):

Hong Jie Pei ◽

Chun Gen Shen ◽

Wen Jie Zheng ◽

Gui Cheng Wang

Keyword(s):

Fluid Dynamics ◽

Experimental Investigation ◽

Flow Field ◽

Working Fluid ◽

Cfd Analysis ◽

Metal Working ◽

Minimal Quantity Lubrication ◽

Minimal Quantity ◽

Computer Fluid Dynamics ◽

Flank Face

MQL (minimal quantity lubrication) machining produces almost similar cutting performance to conventional flood supply machining while using much less metal working fluid. To take full advantage of MQL machining and expand its applicability, an understanding of its jet orientation is critical. Through computer fluid dynamics (CFD) analysis of MQL flow field surrounding the workpiece and tool, it was found that a zone of negative pressure (ZNP) existed between workpiece and flank tool face in turning and was in favor of coolant particle arriving at tool tip. Cutting force was minimal and discontinuous chip effect was best of all when spraying from principal flank face and at range of target 20mm.

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