Indexable insert drill

Details Indexable insert drill Indexable insert drill

1992-11-12

1993-12-14

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool-support with means to permit positioning of the tool...

Pivotable tool

408189, 408224, 408713, B23B 5102

Patent

active

052696189

ABSTRACT:
An indexable insert drill for producing a hole in a workpiece by relative rotary motion between the drill and workpiece. The drill comprises an elongated body having a central axis and a leading end, and a plurality of cutting inserts mounted on the leading end of the body. The cutting inserts are displaced at different radial locations relative to the central axis of the body. Each cutting insert has a cutting edge formed by a pair of respective inside and outside active cutting edge segments with the inside cutting edge segment being located closer to the central axis of the body than the outside cutting edge segment thereof. The inside and outside cutting edge segments of the respective cutting inserts extend at obtuse angles to one another and define therebetween apexes which are axially displaced at different distances from a plane normal to the central axis of the drill at the leading end of the drill which distances increase in length from an innermost one of the inserts to an outermost one thereof.

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patent: 4563113 (1986-01-01), Ebenhoch
patent: 4586858 (1986-05-01), Kubota
patent: 4889455 (1989-12-01), Karlsson et al.
patent: 4889456 (1989-12-01), Killinger
patent: 5049011 (1991-09-01), Bohnet et al.

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