Spot drilling insert

Details Spot drilling insert Spot drilling insert

2004-01-15

2009-06-02

Ashley, Boyer D (Department: 3724)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

C408S213000, C408S225000, C408S713000

Reexamination Certificate

active

07540696

ABSTRACT:
A spot drilling tool includes a drill holder and an insert removably mounted to the holder. The insert is a standardized part configured to support a drill point in a predetermined position forward of the drill holder and centered on the rotational axis of the drill holder. The drill point has two flutes and two substantially conical land surfaces extending between the flutes. The land surfaces have centers of curvature offset from the rotational axis of the insert to provide radial clearance for the trailing portion of the land. A chisel edge at the tip of the drill point is supported by a tapered web defined between the diagonally opposed and offset flutes. Linear cutting edges are formed at the junction of a planar flute surface and the conical land surface. The cutting edges define a narrow included point angle of between 50° and 80°.

REFERENCES:
patent: 3288015 (1966-11-01), Hanneman
patent: 3395603 (1968-08-01), Skierski
patent: 3564948 (1971-02-01), Pomernacki
patent: 4147088 (1979-04-01), Whittaker, Jr.
patent: 4286904 (1981-09-01), Porter et al.
patent: 4565473 (1986-01-01), Hosoi
patent: 4708557 (1987-11-01), Hashimoto
patent: 4787792 (1988-11-01), Jesson et al.
patent: 4968193 (1990-11-01), Chaconas et al.
patent: 5112167 (1992-05-01), Shiga et al.
patent: 5149234 (1992-09-01), Durfee, Jr.
patent: 5286143 (1994-02-01), Schimke
patent: 5288183 (1994-02-01), Chaconas et al.
patent: 5779403 (1998-07-01), Kleine et al.
patent: 5827019 (1998-10-01), Morrissey
patent: 6095723 (2000-08-01), Reynolds et al.
patent: 6129162 (2000-10-01), Hauptmann
patent: 6227774 (2001-05-01), Haughton et al.
patent: 6260637 (2001-07-01), Haussmann et al.
patent: 6312432 (2001-11-01), Leppelmeier
patent: 6371702 (2002-04-01), DeWald et al.
patent: 6446741 (2002-09-01), Kersten et al.
patent: 6565296 (2003-05-01), McKinley et al.
patent: 6629805 (2003-10-01), Eischeid
patent: 6641395 (2003-11-01), Kumar et al.
patent: 6702047 (2004-03-01), Huber
patent: 6848869 (2005-02-01), Stokey
patent: 7147414 (2006-12-01), Mast et al.
patent: 2003/0077134 (2003-04-01), Moser et al.
patent: 2004/0001741 (2004-01-01), Mast et al.
patent: 2004/0151553 (2004-08-01), George et al.
patent: 2006088267 (2006-04-01), None

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