Boring tool for composite laminate materials

Details Boring tool for composite laminate materials Boring tool for composite laminate materials

1995-10-30

1998-09-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool having crystalline cutting edge

408229, B23B 5102

Patent

active

058138048

ABSTRACT:
A polycrystalline diamond (PCD) tipped tool for producing holes in non-ferrous and non-metallic composite materials without delamination. The tool comprises an elongated body portion having a distal cutting region and a proximal shank region and first and second cutting regions including first and second planar surfaces, respectively. The planar surfaces diverge in a direction from the distal cutting region toward the proximal shank region to define a cutting angle that is preferably about 120.degree..
A first axial flute separates a forward edge of the first cutting region from a trailing edge of the second cutting region and a second axial flute radially opposed to the first axial flute separates a forward edge of the second cutting region from a trailing edge of the first cutting region. Each of the first and second cutting regions further includes a planar surface forming with a forward edge thereof respective first and second clearance angles of between 10.degree. to 20.degree., with the first clearance angle being greater than said second clearance angle. In accordance with an especially preferred embodiment, the first clearance angle is 19.degree. and the second clearance angle is 11.degree..

REFERENCES:
patent: 4561813 (1985-12-01), Schneider
patent: 4759667 (1988-07-01), Brown

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