Cutting by use of rotating axially moving tool – Tool of specific diverse material
Patent
1992-03-30
1992-10-13
Bishop, Steven C.
Cutting by use of rotating axially moving tool
Tool of specific diverse material
407 50, 407110, 407119, 408145, 408231, 408713, B23B 2716, B23B 5100, B23B 2720
Patent
active
051545500
ABSTRACT:
A drill bit has a throw-away drill bit tip in the form of an insert (21, 31) secured to a shank (22, 32) to be mounted in a drilling tool. The insert (21, 31) is disengageably mechanically connected with the shank (22, 32) without any screws. At least a cutting edge of the insert (21, 31) is made of a diamond or cubic boron nitride sintered body, and the shank (22, 32) is made of steel. Due to this structure, the insert (21, 31) has an excellent wear resistance and an adhesion resistance. The shank (22, 32) has sufficient toughness against breakage. Such a drill bit does not require any resharpening for continuous use during bit life.
REFERENCES:
patent: 3540323 (1970-11-01), Rishel
patent: 4231762 (1980-11-01), Hara et al.
patent: 4375517 (1983-03-01), Watanabe et al.
patent: 4527931 (1985-07-01), Sarin
patent: 4744704 (1988-05-01), Galvefors
patent: 4909677 (1990-03-01), Noguchi et al.
patent: 4950557 (1990-08-01), Nakai et al.
Japanese Industrial Standard"Chormium Molybdenum Steels"; No.: JIS G 4105-1979.
Japanese Industrial Standard "Carbon Tool Steels" No.: JIS G 4401-1983.
Japanese Industrial Standard "High Speed Tool Steels" No.: JIS G 4403-1983.
Japanese Industrial Standard "Alloy Tool Steels" No.: JIS G 4404-1983.
Isobe Kazutaka
Noguchi Kazuo
Nomura Toshio
Bishop Steven C.
Fasse W. G.
Kane, Jr. D. H.
Sumitomo Electric Industries Ltd.
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