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Laser Drilling

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Laser Drilling

  1. 1. Laser in industry Laser Drilling Welding Cutting
  2. 2. What’s Laser Drilling ?
  3. 3. advantages • Ease of programming ( CNC) • High accuracy ( accurate surface finish ) • Non contact process (no wearing ) • high production rates ( faster setup time , less tooling )
  4. 4. Drilling Melting Vaporization
  5. 5. 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.
  6. 6. What are the types of laser used ?!
  7. 7. 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 ))
  8. 8. 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
  9. 9. Different techniques Single shot percussion trepanning helical
  10. 10. Single shot drilling • Attributes: Single pulse High energy • Produces large no. of holes in extremely short amount of time
  11. 11. Percussion drilling • Attributes: Multiple short duration pulses Low energy (compared to single shot pulses) • deeper holes • more precise holes
  12. 12. On the fly
  13. 13. Applications Rubber Silicon Medical devices Nozzles

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