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The 6th SEMI-DRY CUTTING INTRODUCTION CHAPTER 1

As known from the protocol
adopted at the Kyoto conference
and the agreement made at
the Heiligendamm Summit heldin 2007, anti global warming
momentum is gathering in world
scale. We believe that Japanesemachine tool builders, as world
leaders of machine tool industries,can make acontribution to global warming countermeasures
by supplying highly efficient, energy saving
machines to customers. As a part of countermeasures,
this chapter provides information on semi-drycutting (MQL: Minimum Quantity Lubrication).
Semi-dry cutting was first introduced at JIMTOF
1988, and nine years have pas sed since;
however, this is not prevailing in turning
operation due to various problems. Recently,
substantial data in turning operation has beencollected to solve the problems and this method
is gradually being put into practical use.

Some people may already know about semi-dry cutting.
This is a brief introduction. Semi-dry cutting
is very close to dry cutting but supplies avery small quantity of coolant (2 to 30 cc per hour)to the point of cutting. Due to the nature ofthis cutting method, differently from conventional
methods with flood coolant or mist coolant,
it is essential to supply requisite minimum
quantity of coolant in the required state(drop diameter) accurately with agility, according
to the type of cutting.

[Cutting with oil-based coolant]
generated due to heat generated
from cutting.

[Cutting with mist-hole tools]
Small quantity of mist is
supplied to the point of cutting.

Bluebe's coolant for semi-dry cutting is vegetableoil based coolant. This is safe for humans andthe environment and can contribute to environmental
benefit of biomass*. However, introduction ofsemi-dry cutting without careful evaluation could
rather burden the environment since semi-dry
coolant supply systems use compressed air,which may increase energy consumption if not usedappropriately. Furthermore, even if the coolant
itself is safe to humans, inhaling large volumesof coolant mist can be harmful. Accordingly,
it is recommended to install a mist collector
or similar equipment taking into consideration
the workplace environment. * "Biomass" is renewable
and recyclable biological energy. The total amountof solar energy and energy produced by plantbiomass is estimated to be 10 times the amountof primary energy.

Advantages of Semi-dry Cutting
Compared with conventional cutting methods forsmall-diameter deep hole drilling on crankshafts(HSS drill + peck drilling on special machinesor gun-drilling with high-pressure coolant),
semi-dry cutting increases efficiency and reduces
total investment costs. Taking these advantages
into consideration, many automobile manufacturers
are introducing semi-dry cutting in their production
plants. Now, semi-dry cutting is considered amethod for realizing high efficiency and reducing
costs as well as an environmental countermeasure.

To Introduce Semi-dry Cutting
Changing the cutting method to semi-dry is not easy
only by individual effort and cooperation of various
fields is indispensable. If you have a problem inintroducing semi-dry cutting method, please contact
our Sales Engineering Section.Reference document:Document released by Fuji BC Engineering Co., Ltd.