Laser Welding
* introduction
losers
Using for material
*
processing
lasers hav wide
range of applications
X a
_
materials
s
processing
-
welding cutting, surface
,
treatment ,
silling making
,...
,
test and measurement techn
allignment, metrology, holography
*
Communication
a and in
farm techn -
optical files ,
dis
tool
&
Surgery Cutting for eye
->
singery
Entertainment (CD
*
, light games ,.. )
,..- -
?
>
- Laser
light ison
interesting Energy source
for
material
processing
heat I
↳
Light (photom generates in a narrow ,
concentrated beam
↳ densities W/mG-Sun 10
Energy
in :
-tatogeneous welding oees
o
>
-
Spark Erasion : 16
>
-
Electin Beom : 1012
>
-
Laser Beam : 1012
Pulsed Laser beam : to 1020
up
>
-
beam
②Alsaptim and
properties
Goal
muchEnergy
Alsab
↑ : . as as
posible and
troem e
* Aleoption
factor depends m :
-wavelength of loser
-optical propertien of material
-
temp of
.
moterial
uu
‰
-
Surface state (solid
lig , ,
contact 1
vopour( ↳ more in
-surface condition
(Roughnent beam
for e =
if smooth
surface higher
-> incidence
angl reflection
∆
, gr
1M101. ---
& loser
light alraption
*
quality of laser
operation depends on
focus of the beam
In Small
Spot diameter (2rq)--high E
density ,
accurate operations
heat Zione (HAZI
narrow
offect. .
distones between
*
high focal length (f) + small spot lager
mochine
and work
pieca
*
lage distance
of focus JDOF) =
wilding and
cutting of thick plates , Simple positioning
machine head
Small
In diam .
It
of entry lases beam =>
Compact
how HAZ drawback fast cooling
Parameten
*
influencing beam
form
=
=> Brittele phases
beam
Small
wavelengths -
corresp to high quality
+
improved focus
posibilities
→ 2
rf
=
界表
Transvensa
* EM Mode (TEMxx)
distribution
↳
energy density better the ∅
↳ lower the mode (xx) -
focus around
Preheating
↳ Best
focus forElo mode
good cutting
- 김
ST lower ?
↳ distr desired
for welding -> more
unifam intensity is
Laser used
②
Typer of
&
Categorisation of layers
Lases
typer Gas lascer
* -
a :
COs
-
Solid state losers : Nd-YAG loser
-
-
Filre laser
>
-
Diode laser
>
-
Disk loser
>
-
Excimen laser
*
Operation mode >
-
Continuous
-
-
Pulsed
* introduction
losers
Using for material
*
processing
lasers hav wide
range of applications
X a
_
materials
s
processing
-
welding cutting, surface
,
treatment ,
silling making
,...
,
test and measurement techn
allignment, metrology, holography
*
Communication
a and in
farm techn -
optical files ,
dis
tool
&
Surgery Cutting for eye
->
singery
Entertainment (CD
*
, light games ,.. )
,..- -
?
>
- Laser
light ison
interesting Energy source
for
material
processing
heat I
↳
Light (photom generates in a narrow ,
concentrated beam
↳ densities W/mG-Sun 10
Energy
in :
-tatogeneous welding oees
o
>
-
Spark Erasion : 16
>
-
Electin Beom : 1012
>
-
Laser Beam : 1012
Pulsed Laser beam : to 1020
up
>
-
beam
②Alsaptim and
properties
Goal
muchEnergy
Alsab
↑ : . as as
posible and
troem e
* Aleoption
factor depends m :
-wavelength of loser
-optical propertien of material
-
temp of
.
moterial
uu
‰
-
Surface state (solid
lig , ,
contact 1
vopour( ↳ more in
-surface condition
(Roughnent beam
for e =
if smooth
surface higher
-> incidence
angl reflection
∆
, gr
1M101. ---
& loser
light alraption
*
quality of laser
operation depends on
focus of the beam
In Small
Spot diameter (2rq)--high E
density ,
accurate operations
heat Zione (HAZI
narrow
offect. .
distones between
*
high focal length (f) + small spot lager
mochine
and work
pieca
*
lage distance
of focus JDOF) =
wilding and
cutting of thick plates , Simple positioning
machine head
Small
In diam .
It
of entry lases beam =>
Compact
how HAZ drawback fast cooling
Parameten
*
influencing beam
form
=
=> Brittele phases
beam
Small
wavelengths -
corresp to high quality
+
improved focus
posibilities
→ 2
rf
=
界表
Transvensa
* EM Mode (TEMxx)
distribution
↳
energy density better the ∅
↳ lower the mode (xx) -
focus around
Preheating
↳ Best
focus forElo mode
good cutting
- 김
ST lower ?
↳ distr desired
for welding -> more
unifam intensity is
Laser used
②
Typer of
&
Categorisation of layers
Lases
typer Gas lascer
* -
a :
COs
-
Solid state losers : Nd-YAG loser
-
-
Filre laser
>
-
Diode laser
>
-
Disk loser
>
-
Excimen laser
*
Operation mode >
-
Continuous
-
-
Pulsed
