Laser Procesing Power Point Show
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Transcript of Laser Procesing Power Point Show
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LASER PROCESSING OF
MATERIALS
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Interaction between laser and
material Low power
reflected
refracted
scattered
diffracted
minimal ener! absorption " #non"contactin$%
&i' power " ener! s(fficient to
'eat
melt
e)aporate
b(rn
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Processes w'ic' (se lasers
C(ttin
*eldin
+rillin
S(rface treatment
Rapid protot!pin Microfabrication
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Rapid protot!pin ,RP- A famil! of prod(ction met'ods w'ic' 'a)e
de)eloped in t'e last ten !ears
Enable parts to be prod(ced from CA+
drawin wit' little or no operator inter)ention
CA+ model is con)erted to la!ers ,STL file- Most wor. b! addin material rat'er t'an
remo)in it
Se)eral (se lasers as part of t'e processin
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*'! (se lasers for processin/
&i' ener! densit!
Can be mo)ed abo(t )er! 0(ic.l! and
acc(ratel!
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Ener! densit! of a laser beam
+efined as t'e ener! incident on (nit
area
+etermined b! laser power and beam
si1e
Can increase b! foc(sin laser beam
Limited b! diffraction
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+iffraction limited spot si1e of
a laser beam Ass(me t'at t'e laser is appro2imatel!
plane3 and t'at it 'as a diameter of D4
It is foc(sed b! a lens of focal lent' f
Gi)e a spot si1e of dspot
spotd f =2.4 f
D
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SA5
A laser beam of wa)elent' 6748m and
diameter 9mm and power 6.* is foc(sed
b! a lens of focal lent' :7mm4 T'eintensit! of t'e foc(sed spot isa-
a-64: *;mm