PCD drill for composite materials

Details PCD drill for composite materials PCD drill for composite materials

2004-11-18

2009-08-18

Howell, Daniel W (Department: 3726)

Cutting by use of rotating axially moving tool

Tool having crystalline cutting edge

C408S224000, C408S230000

Reexamination Certificate

active

07575401

ABSTRACT:
A PCD drill for producing close tolerance holes in multi layer laminates, such as carbon fiber reinforced composites, with minimum fraying of the fibers on both entrance and exit from the hole is provided. The drills provided include a symmetrical cutting point with a self-centering split point and a high shear second cutting lip positioned at the outer diameter of the drill. The drills of the invention may allow for increased cutting speeds and feeds when used with such advanced composite materials, thus increasing tool productivity and providing increased performance.

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