CVN-21 Carrier Turbine Blade Tree Section
Abstract
Dresser-Rand Corporation located in Wellsville, New York, is responsible for power generation for the new CVN-21 Carrier for the U.S. Navy. Development of newer power generation systems has lead to the use of advanced materials with characteristics that allow the turbine blade (bucket) to withstand increased condensation levels. The new material characteristics, with higher than normal Rockwell hardness, created many manufacturing challenges. Shorter tool life, longer processing times, and longer hand finishing operations all contributed to extended lead times and additional costs. Having previously demonstrated that the use of state-of-the-market tooling along with advanced programming techniques can optimize tool performance, Dresser-Rand requested the help of the National Center for Defense Manufacturing and Machining (NCDMM) to review and provide solutions that would reduce the cost and part cycle times of this component. After reviewing the current method, NCDMM engineers concluded that the roughing process encompassed the greatest optimization opportunity. The current method included drilling and milling with multiple tools. This process left uneven amounts of stock remaining on the part, resulting in unpredictable tool life. NCDMM engineers determined water jet roughing would leave an even amount of stock while eliminating several roughing tools.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 23, 2005
- Accession Number
- ADA481797
Entities
Organizations
- National Center for Defense Manufacturing and Machining