1. Laser in industry
Laser
Drilling Welding Cutting

2. What’s Laser Drilling ?

3. advantages
• Ease of programming ( CNC)
• High accuracy ( accurate surface finish )
• Non contact process (no wearing )
• high production rates ( faster setup time , less tooling )

5. Drilling
Melting Vaporization

6. 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.

7. What are the types of laser used ?!

8. 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 ))

9. 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

10. Different techniques
Single shot percussion trepanning helical

11. Single shot drilling
• Attributes:
Single pulse
High energy
• Produces large no. of holes in extremely short amount of time

12. Percussion drilling
• Attributes:
Multiple short duration pulses
Low energy (compared to single shot pulses)
• deeper holes
• more precise holes

14. On the fly

15. Applications
Rubber Silicon
Medical
devices
Nozzles