Non-burring drill for composite materials

Details Non-burring drill for composite materials Non-burring drill for composite materials

1981-10-05

1984-11-06

Vlachos, Leonidas

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408 1R, 408228, B23B 5100, B23B 5108

Patent

active

044809522

ABSTRACT:
A drill for fiber filled composite materials which has a relatively blunt tip portion for initiating a hole in the workpiece, followed by an acute reaming portion for enlarging the initial hole with minimal breakout followed by a circular rear-facing cutting edge for removing fibers projecting from the walls of the hole upon retracting the drill through the hole.

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"Spade Drills for High Production", Butrick, American Machinist, Apr. 17, 1972.

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