Post on 13-Apr-2018
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Cutting Fluids
PREPARED BY : YAGNESH SURESHBHAI MEHTAENROLLMENT NO : 13111!""BRANCH : MECHANICAL ENGINEERINGINSTRUCTED BY : AYNESH #OSHI
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HISTORY
Essential in metal-cutting operations to reduce heatand friction
Centuries ago, water used on grindstones 100 years ago, tallowused (did not cool)
Early 20thcentury saw soap added to water
Solule oils came in 1!"#
Chemical cutting fluids introduced in 1!$$
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FUNCTION OF CUTINGFLUID
Cooling Cutting fluids assist ta%ing away heat and can dissipate
at least &0' of heat created during machiningecrease the temperature at the chip-tool interface y&0 degrees *, and it will increase tool life y up to &
times Lubrication
cutting fluids also aid the cutting process y luricatingthe interface etween the tool+s cutting edge and thechip y preenting friction at this interface, some of the
heat generation is preented Other functions
.rolong cutting-tool life
.roide rust control
/esist rancidity 3
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Heat Generated During Machining
eat finds its way into one of three places or%piece, tool and chips
$
Too much, or!
ill e"#and
Too much, cutting edge
ill brea! don ra#idl$,
reducing tool life
%ct as dis#osable
heat sin!
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Economic Advantages
to Using Cutting Fluids R$du%ti&n &' t&&l %&sts
R$du%$ t&&l ($)*+ t&&ls l)st l&ng$*
In%*$)s$d s,$$d &' ,*&du%ti&n R$du%$ -$)t )nd '*i%ti&n s& -ig-$* %utting
s,$$ds
R$du%ti&n &' l).&* %&stsT&&ls l)st l&ng$* )nd *$/ui*$ l$ss *$g*inding+
l$ss d&(nti0$+ *$du%ing %&st ,$* ,)*t R$du%ti&n &' ,&($* %&sts
F*i%ti&n *$du%$d s& l$ss ,&($* *$/ui*$d .0)%-ining
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Characteristics of a
Good Cutting Fluid12 G&&d %&&ling %),)%it
2 G&&d lu.*i%)ting /u)liti$s
32 R$sist)n%$ t& *)n%idit42 R$l)ti5$l l&( 5is%&sit
"2 St).ilit 6l&ng li'$7
82 Rust *$sist)n%$
92 N&nt&i%
;2 T*)ns,)*$nt
!2 N&n
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Tyes of Cutting
Fluids
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Li!uids
ater is a good conductor of heat ut hasdrawac%s as a cutting fluid t oils easily,promotes rusting of machine parts, and doesnot luricate well
ielectric fluid is used as a cutting fluid inElectrical discharge machines (E3s)
4erosene and ruing alcohol often gie good
results when wor%ing on )lu0iniu0 2
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Thin&all milling of aluminum using a
ater&based cutting fluid on the milling
cutter'
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"astes or gels
Cutting
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CO#Coolant
T-$ ChilAire systemis &n$ &' t-$,i&n$$*s in t-$ ),,li%)ti&n &' CO3)s )%&&l)nt2 Eisting CNC 0)%-in$s %)n .$
*$t*&>tt$d (it- t-is s)'$ )nd$n5i*&n0$nt)ll '*i$ndl %&&l)nt),,*&)%-2
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Air or other gases $e%g%&
nitrogen'5mient air, of course, was the original
machining coolant Compressed air, suppliedthrough pipes and hoses from an air
compressor and discharged from a no66leaimed at the tool, is sometimes a usefulcoolant
7i8uid nitrogen as a coolant in 9 for CC cameras in astronomy
for computers and e:treme oercloc%ing
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(eferences
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