Laser Drilling

Laser in industry

Laser

Drilling Welding Cutting

What’s Laser Drilling ?

advantages• Ease of programming ( CNC)

• High accuracy ( accurate surface finish )

• Non contact process (no wearing ) • high production rates ( faster setup time , less tooling )

Drilling

Melting Vaporization

Melting Vaporization

The energy required to remove material by melting is about 25% of that needed to vaporize the same volume, so a

process that removes material by melting is often favored.

What are the types of laser used ?!

According to techniques of pumping :• Vaporization : Q-switched ND-YAG ((neodymium-doped

yttrium aluminium garnet ))

Melting : flashtube Pumped ND-YAG ((neodymium-doped yttrium aluminium garnet ))

Melt expulsion

• It arises as a result of the rapid build up gas pressure . For it to happen a molten layer must be formed and pressure gradient must be high enough to overcome surface tension forces .

Melting expulsion

Fine

Excellent wall definition

Small heat affected zone

coarse Quick

Different techniques

Single shot percussion trepanning helical

Single shot drilling

• Attributes:Single pulseHigh energy

• Produces large no. of holes in extremely short amount of time

Percussion drilling

• Attributes:Multiple short duration pulsesLow energy (compared to single shot pulses)

• deeper holes• more precise holes

On the fly

Applications

Rubber Silicon Medical devices Nozzles