Abstract:
Minimum quantity lubrication (MOL) refers to the use of cutting fluids of only
a minute amounHypically of a flow rate of 50 to 500 mllhour-which is about
three to four orders of magnitude lower than ti1e amount commonly used in
flood cooling condition, where, for example, up to 10 liters of fluid can be
dispensed per minute. The concept of minimum quantity lubrication,
sometimes referred to as near dry lubrication or micro lubrication, has
been suggested since a decade ago as a means of addressing the issues of
environmental intrusiveness and occupational hazards associated With the
airborne culling fluid particles on factory shop floors. The minimization of
cutting fluid also leads to economical benefits by way of saving lubricant
costs and workpiece/tool/machine cleaning cycle time.
Compared to the wet drilling, MQL drilling performed many superiors mainly
due to high lubricant capacity. It also provides significant reduction in
roundness deviation at the entrance and end of the holes and also taper
values Furthermore, it prOVides environment friendlmess (maintaining neat,
clean and dry working area, avoiding inconvenience and health hazards due
to heat, smoke, fumes, gases etc. and preventing pollution of the
surroundings) and improves the machinability characteristics.
