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Course Details
Laser Safety
- Laser classification
- Beam hazards
- Eye and skin hazards
- Non-beam hazards
- Electrical
- Chemical
- Fire
- Explosion
- Control measures
- Safe operation
- Eye and skin protection
Laser Weld Defects
- Weld defect terminology
- Discontinuity
- Porosity
- Cracks
- Undercut
- Depth of Fusion
- Spatter
- Product impact
- Cost impact
How to Identify Laser Weld Defects
- Destructive testing
- Tensile strength
- Hardness
- Corrosion
- Micrograph (cross-section)
- Non-destructive testing
- Visual/optical
- Helium leak
- Radio isotope
- Ultrasonic
- In-process monitoring
Root Causes of Laser Weld Defects
- Material
- Laser parameters
- Power and focus
- Beam misalignment
- Temporal profile
- Spatial profile
- Equipment set-up and tooling
- Shield gas
- Misalignment
Methods to Reduce/Eliminate Laser Weld Defects
- Laser weld profile measurements
- Micrographs
- Cross-sectioning
- Measurement methods and equipment
- Troubleshooting techniques
- Optics
- Precision measurement
- Weld profile tell-tale
- SPC for laser welds
- Program set up
- Auditing control
- Reaction to SPC
Laser Adjustments for Defects
- Power
- Optics
- Specifications
- Cosmetic enhancements
- Shield gas
- Focusing optics
- Equipment set-up
Development of Product Weld Specifications
- Design engineering
- Quality assurance
- Maintaining weld specifications
Course Exercise: Micrograph Cross-Section Measurement
- Use digital microscopes (provided) to analyze laser welded assemblies for defects.