Abstract:
The concepl of Minimum QU811tity Lubrication (Mal) sometimes referred
to as near dl)' lubrication or micro lubrication has been advocated since a decade
ago as a me8rlS of addressing the issue of environmer'llal troublesome. Minimum
Quantity Lubrication mentions to the use of cutting fluid of only a Iiille amount
usually of a flow rate of 50 to 500 ml/hour-which is about tllree to four orders of
scale lower than the amount commonly used in flood cooling condition, lor
example, up to 10 liters of fluid can be supplied per minute. Saving lubricant costs
and tool Iworkplece/machine cleaning cycle time the minimization of cutting fluid
also leads to economical benefits.
A number of studies have showr'l that MQL machining can show
saliSfactory performance in praclical machining operations. But, there has been
lillie Investigation of the cutting fluids to be used in MQL machining. In this regard
the proposed research work has been earned out with a view to study the effects
of Minimum Quantity lubrication (MQl) by water soiuble cutting fluid on the cutting
performance of medium carbon steei, as compared to completely dry and wet
machining in terms of tool wear reduction, tooi iife increment and machined
surface mtegrlty, Based on the procesS parameters (speeds, feeds and depth of
cut) an approach has also been performed to recognize the apt MQL nozzle
position for better coohng aellon, In the study, the minimum quantity iubrication will
be provided with a spray of air and water soluble cutting fluid. Significant progress
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has been made In dry and semidry machining recently, and Minimum Quantity
Lubrication (MQL) machining in particular has been accepted as a successful
semi-dry application because of its environmentally friendly characteristics. "
Compared to the dry or wet machining, MOL machining performed
much better-quality, mainly due to considerable in cutting zone temperature
enabling favorable chip formation and chip-tooi interaction, It also provides
substantial reduction in tool wear, which augment the toci life, and surface finish.
Moreover, it provides environment friendliness (maintaining neat, clean and dry
working area and improves the machinability characteristics.
