Milling Flashcards
what is milling
an interupted cutting operation
what are the 3 different tuypes of milling operations
plain milling
face milling
end milling
what is plain milling
axis of cutting tool purpindicular to surface
operation preformed by cuttiing edges of cutter
used on horizantal milling machine
what are tyhe 2 types of plain milling/whats the difeerence
slab milling- cut covers whole workpeice
slotting- width of cutter is less then workpeice making a slot in the material
what are the 2 types of face milling/whats the difference
convential face milling- cutter overhangs on both side
partial face milling- cutter overhangs on 1 side
what is face milling
cuting across the face of the material
what is end milling
the multpiple cutting edges tool
what are the 4 types of end milling
surface contouring
profile milling
pocket milling
slot milling
What is slot milling
most difficult end milling operation
the full cutter diameter is ingaged in the cut
what is ppocket milling
mills pockets in the material
what is profile milling
end milling on the outside of the part
what is the surface countouring
a ball nose cutter on a curved path
what are the considerations for end mills
material
coating
centercutiing
flute count
what are the 3 different materials
HSS
solid carbide
indexable tooling
why choose hss
cheaper then carbide
more forgiving
easily to sharpen
why chose solid carbide
operates at higher cutting speeds/feed rates
better wear resistance
more rigid and stable
brittle/expensive
why chose indexable carbide
only needd to replace inserts
get benifts of carbide
common for turning tools
center cutting vs non center cutting
center has more variety of applications, is allowed to plunge dril and ramp
non centreing is used for side cutsonly, not applicable whem plunging is required
what does flute count have to with materials
soft materials will need larger flute valleys
what does flute count have to do tool geometry
more flutes mean large coreand smaller flute valleys
how does milling work
workpeice is not moving tool is spinning
climb vs conventional milling
climb is down milling while convemntional is up mlling
climb milling advatages
less load on cutting edge
better surface finish
improves tool life
requires less tool power
climb milling facts
cleaner sheer plane
longer tool life
chips less likely to be recut
convential milling facts
increased tool wear
chips more likely to get recut
what is shaping
shaping only cuts on forward
what is planing
smilar to shaping but is more rigid and is used for larger peices
what is broaching
a multi-tooth tool takes multiple cuts. each cut is a little deeper the earlier tooth
what are the advantages of broaching
can be used for internal and external shapes
highly economic for mass production
easily can go from rough to finished
only used a single motion cutting
what are the limitations of broaching
requires sperate tool per job
no size ajustability
high tool costs
usable only for light cuts
what is sawing
narrow slit in into the peice with a tool with a series of closely spaced teeth
what are the 3 types of sawing
hack sawing
band sawing
circular sawing
