Directed Light NIST presentation
Download as PPTX, PDF
0 likes72 views
The document discusses laser welding and process monitoring of medical devices. It notes that laser welding is used for dissimilar materials in medical applications like biopsy probes, batteries, and surgical tools. It emphasizes that process monitoring is vital to ensure consistent laser power delivery and the correct laser pulse duration, frequency, and assist gas parameters are used depending on the metal types and thicknesses being welded to achieve high quality welds. Vision and motion systems can also help with precision part placement and inspection for micro-welding applications.
Directed Light NIST presentation
- 1. Laser Welding and Process Monitoring of Medical Devices Neil Ball President
- 2. AboutDIRECTEDLIGHT Over 35 years in the Photonics Industry Laser Parts, Accessories and Service Advanced Technology Job Shop Custom Systems Integration
- 3. Medical Applications Dissimilar Materials Biopsy Probe Batteries Defibrillators Neuro Stimulators Welding of Pacemakers Deep Penetration Welding (.025< 1mm .100/4mm) Surgical tools
- 4. Power & Energy Monitoring Power Management Weld quality dependent on consistent delivery of laser intensity Manual monitoring vs. direct feedback Automation and system integration ensures high throughput and quality welds. Coherent Ophir Gentec
- 5. Pulse Verification Pulse Management Pulse duration and frequency directly influence weld quality We now have three knobs to turn: laser power, pulse duration and pulse frequency Process monitoring is vital to ensure the correct parameters are used dependent on metal types and thickness. Innovative Laser Technologies (ILT)
- 6. Gas Flow AssistGas Considerations A Fourth Knob: Assist gas can be used to cool the surrounding weld area, remove oxidation and/or keep the laser beam delivery optics clean Pressure and flow sensors are required to ensure a proper assist gas for the task. Multiple assist gases will require multiple sensors Laser Mech
- 7. Vision Tools MachineVisionas an aide For many applications it is a requirement particularly for micro- welds Increasingly small spot sizes and miniature components, precise placement is vital for high yield Vision systems are also used for part inspection during QC Fraunhofer Institute for Physical Measurement Techniques
- 8. Motion Tools Part PlacementAccuracy Directing the laser spot on target can require micron scale accuracy As the number of axis increase, tolerance becomes additive. Part placement to beam welding spot must be considered. Courtesy Aerotech