附录
附录1英文原文
BasicMachi
i
gOperatio
sa
dCutti
gTech
ology
BasicMachi
i
gOperatio
sMachi
etoolshaveevolvedfromtheearlyfootpoweredlathesoftheEgyptia
sa
dJoh
Wilki
so
sbori
gmillTheyaredesig
edtoproviderigidsupportforboththeworkpiecea
dthecutti
gtoola
dca
preciselyco
troltheirrelativepositio
sa
dthevelocityofthetoolwithrespecttotheworkpieceBasicallyi
metalcutti
gasharpe
edwedgeshapedtoolremovesarather
arrowstripofmetalfromthesurfaceofaductileworkpiecei
theformofaseverelydeformedchipThechipisawasteproductthatisco
siderablyshortertha
theworkpiecefromwhichitcamebutwithacorrespo
di
gi
creasei
thick
essoftheu
cutchipThegeometricalshapeofworkpiecedepe
dso
theshapeofthetoola
ditspathduri
gthemachi
i
goperatio
Mostmachi
i
goperatio
sproducepartsofdifferi
ggeometryIfaroughcyli
dricalworkpiecerevolvesaboutace
tralaxisa
dthetoolpe
etratesbe
eathitssurfacea
dtravelsparalleltothece
terofrotatio
asurfaceofrevolutio
isproduceda
dtheoperatio
iscalledtur
i
gIfahollowtubeismachi
edo
thei
sidei
asimilarma
ertheoperatio
iscalledbori
gProduci
ga
exter
alco
icalsurfaceu
iformlyvaryi
gdiameteriscalledtapertur
i
gifthetoolpoi
ttravelsi
apathofvaryi
gradiusaco
touredsurfacelikethatofabowli
gpi
ca
beproducedorifthepieceisshorte
ougha
dthesupportissufficie
tlyrigidaco
touredsurfacecouldbeproducedbyfeedi
gashapedtool
ormaltotheaxisofrotatio
Shorttaperedorcyli
dricalsurfacescouldalsobeco
tourformedFlatorpla
esurfacesarefreque
tlyrequiredTheyca
bege
eratedbyradialtur
i
gorfaci
gi
whichthetoolpoi
tmoves
ormaltotheaxisofrotatio
I
othercasesitismoreco
ve
ie
ttoholdtheworkpiecesteadya
dreciprocatethetoolacrossiti
aseriesofstraightli
ecutswithacrosswisefeedi
creme
tbeforeeachcutti
gstrokeThisoperatio
iscalledpla
i
ga
discarriedouto
ashaperForlargerpiecesitiseasiertokeepthetoolstatio
arya
ddrawtheworkpieceu
deritasi
pla
i
gThetoolisfedateachreciprocatio
Co
touredsurfacesca
beproducedbyusi
gshapedtoolsMultipleedgedtoolsca
alsobeusedDrilli
gusesatwi
edgedflutedtoolforholeswithdepthsupto5to10timesthedrilldiameterWhetherthe
fdrilltur
sortheworkpiecerotatesrelativemotio
betwee
thecutti
gedgea
dtheworkpieceistheimporta
tfactorI
milli
goperatio
sarotarycutterwitha
umberofcutti
gedgese
gagestheworkpieceWhichmovesslowlywithrespecttothecutterPla
eorco
touredsurfacesmaybeproduceddepe
di
go
thegeometryofthecuttera
dthetypeoffeedHorizo
talorverticalaxesofrotatio
maybeuseda
dthefeedoftheworkpiecemaybei
a
yofthethreecoordi
atedirectio
s
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