Blank material for drill and drill therefrom

Details Blank material for drill and drill therefrom Blank material for drill and drill therefrom

1992-05-29

1993-12-28

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool of specific diverse material

761086, 408145, 408230, B23B 5102

Patent

active

052733793

ABSTRACT:
A blank material for a drill having a cutting edge and a drill produced from this blank material. The blank material comprises a first blank material having a twisted groove formed on the outer circumference of a columnar base metal sinter and filled with a superhigh pressure sinter, the base metal sinter and the superhigh pressure sinter being sintered and affixed together into one body, and a second blank material composed of a base metal sinter, and the first and the second blank materials are sintered and affixed together at the end faces at superhigh pressure and high temperature. A drill is manufactured by fixing a shank material to the blank material, and forming a twisted cutting edge and a front edge part continuing therefrom, the cutting edge being formed on the superhigh pressure sinter on the first blank material and the front edge part being formed on the second blank material. A blank material with a first blank material and two second blank materials, the second blank materials being sintered and affixed respectively to each end face of the first blank material, is used, and split into two, and then two shank materials are fixed respectively to each of the two split shank materials, then two drills of high wear resistance and performance may be produced out of one blank material economically.

REFERENCES:
patent: 4679971 (1987-07-01), Maier
patent: 4762445 (1988-08-01), Bunting
patent: 4880707 (1989-11-01), Kohno et al.
patent: 5031484 (1991-07-01), Packer

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