Laser Welds – Types

There are three key weld geometries used in laser welding: butt, lap and fillet. Each has features that align with certain applications.

Butt Weld

  • Most efficient for laser power vs weld strength & speed
  • Weld strength directly related to weld depth
  • Least forgiving for part fit-up
  • Minimum part thickness limitation

Laser Welds - Types

Lap Weld

  • Weld strength from weld width at interface
  • Most forgiving for part fit-up
  • Thin (top) to thick preferred

Laser Welds - Types

Fillet Weld

If the laser is angled to the workpiece:

  • More efficient for strength
  • More forgiving for fit-up
  • May require more complex configuration/motion

If the laser is aligned with the workpiece:

  • More convenient for tooling and configuration
  • Thickness of top part limited to 0.02″

Laser Welds - Types

 

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