Turning Flashcards
What is turning
single pooint cutting tolol removing material from rotating work peice to form a cyllinder
where is turning preformed
Lathe
what are the 11 different parts of the lathe and where are they located
Head stock
tail stock
Spped controls ( headstock)
feed controls (headstock)
Bed ( tail stock)
Spidle (headstock)
carriage
tool post ( carriage)
ways
threaded lead screw
cross slide (carriage)
what is the headstock for
hold one end of work peice
is hollow
controls spindle lead screw and feed screw sppeds
what is the purpose of the carriage
holds/ controls actiity of te the cutting tool
what is the purope of the rack
hanfdd feeding
what is thhe purpose of the lead screw
for threading
what is the purpose of the feed rod
power feed
what are the cliucth conttrols for
forward reverse and stop
what is the purpose of the tail stock
supports tyhhe other end of workpeice ( if requires)
can be used for drilling and reaming
slides along bed
what is 3 components of lathe sizing and there defintions
swing- max diametre of workp[eice
max distance between centres: distance between the centre of the hed stock to tail stock
spindle bore- max bar diameter that will fit through the headstock
what are the differnet tool pots
quick change tool post
4 way turret
latern tool post
wat is the quick change tool post
40 positions at 9 eg increments
easily ajustable tool height
what us a 4 way turret
can hold multple tools
very hard to set tool hights
what are the 6 metthods of holding work
chucks
collet
face plate
live/dead centre
drive dog
mandrel
what are the 3 different types of chucks and what makes the,m special
3 jaw- self centrering jaws
4 jaw- bindependant jaws
6 jaw- self centreing jaws
what are. the advantages of a collet
better tool clearence
better workpeice contact
less mass = less energy
avaliable for square/hex bar but custom shapes are possible
what are the disadvantages of a collet
only suitable for small diameters
small range
need a different collet for each size of bar stock
what is a face plate
a plate attachted to the spindle with 4 clamps attached to the workpeice
only used for non cylindrical work peices
what is a liv/ dead centres and what is the difference
live centera have an interanal bearing system allowing them to rotate with peice where dead centres dont rotate
attahced to tailstock of machine
what are centre drills/ what is important when using 1
they create 60 deg holes to support liv/dead centres
important- make sure the tool is 60 deg cnetre drill since countersinks do not have the tip relief, inspect the hole
what is a morse taper
a self holing taper in the tail stock
what is the point of the morse taper
allows quick tool change and repeatadly
what is a drive dog
a clamp that is attached on to the part and to a plate (dog plate)
what is another word fro drive dog
between centres
what is a mandrel
a fixture mounted in the achuck that can hold pre machined part
what are the ccutting condidtions needed for turning
cutting speed
feed
depth of cut
what is cutting speed
spped of the tool relitive to the surface of the part
what is turning on a lathe
workpeice is spinning tool is atationary
what are the 11 different types of turning operations
facing
taper turning
countour turning
form turing
chamfering
grooving/part off
face grovving
threading
drilling
boring
knurling
what is facing
tool is fed inward (purpindicular to workpeice axis)
what is taper turning
cutting on an angle
what is countor turning
feeding the tool followiing the countor of the shape
what is form turning
a tool that has a certian shape that only makes that shape
what is chamfering
cutting the edge of a cylinder forming a chamfer
what is grooving/part off
tool is fed into the rotationg part
partially- craetes grooves
entirely cuttingoff part
what is importamt when face grooving
looking at tool clearence
what is threading
pointed toll fed linear across the surface
tool moves parrellel to part
what is drilling
work ritating drill not
what is boring
inceasing diameter of exsisting hole
what is the difference between boring and turning
boring is on the inside of a hole
turning is done on the outside of the cylinder
what are the difficulties when boring
less rigid setup
hard to evacuate chips
chips want to wrap around boirng tool
hard to see whats happening
hard to make hole have flat bottom
what is step boring
a tool to be used when a large cut is neededd as the tool has mulyipe heighhts set
what is knurlinh
where a pattern is rolled onto the material to create texture
what are the 2 types of knurling
form knurling- uuses hard rolls to deform the material
cut knurling- uses sharp edge tool pressed on an angle to cut the pattern
