Objective:
This project proposes to evaluate next generation double electrode processes for 4-mm fillet welds as this fillet size is more likely to transition into existing shipyard facilities. (The ability to deposit 3-mm fillets requires precision no gap fit-up, clean bright metal surfaces, and highly accurate seam tracking and is an area for future work.)
The project goals are to:
- Evaluate and benchmark advanced double electrode GMAW processes and consumables for high-speed fillet welding
- Survey industry, screen candidate processes, and select preferred process variants for feasibility testing. Candidate processes for feasibility testing include:
- Twin (i.e., Lincoln HyperFillTM)
- Hot wire tandem (Lincoln)
- Tandem (Cloos)
- Adjustable configuration tandem (D&F Specialty Torch)
- Advanced consumables for tandem (advanced metal core electrodes for high-speed performance)
- Downselect and develop ARCWISE operational windows and bead shape maps for up to three variants
- Target application: 4-mm horizontal fillet welds
- Provide technology transfer and demonstration workshop upon project completion
Overview
Welding Technology
Project Team:
- EWI
- NASSCO
- HII-Ingalls Shipbuilding
- NSWC Carderock
2021
NSRP ASE Investment: $142K
