NAVSEA Aircraft Carrier Filter Housing
Abstract
During the production of a filter housing for the Naval Sea Systems Command (NAVSEA), Hamill Manufacturing Company, Trafford, Pennsylvania, was required to drill a 5.5-inch-diameter, 21.5-inch-deep hole in a block of 1020 steel. The operation consumed excessive time and tooling. It took 63 minutes and four drills -- in spot, 3.0-inch, 5.0-inch, and 5.5-inch diameters -- to complete the hole. Chip control was an additional problem, frequently making it necessary to retract the drills in mid-cut to clear out the unwieldy steel chips. NAVSEA asked if the National Center for Defense Manufacturing and Machining (NCDMM) could provide a solution to reduce machining time and improve chip control. NCDMM suggested application of a 5.5-inch-diameter deephole drilling system that featured a coated carbide pilot drill flanked by two flutes tooled with a total of four indexable carbide cutting inserts. The inserts had titanium-nitride coating for wear resistance, and an advanced chip control geometry. Internal passages in the drill body delivered coolant directly to the cutting edge/workpiece interface.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 2004
- Accession Number
- ADA481960
Entities
Organizations
- National Center for Defense Manufacturing and Machining