topic cutting fluid

7/26/2019 Topic Cutting Fluid

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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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