Metal tools and implements – making – Blank or process – Drill
Patent
1989-10-12
1991-06-04
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Drill
76DIG11, 76DIG12, 407118, 407119, 408144, B23B 2720, B23B 2718
Patent
active
050203940
ABSTRACT:
A polycrystal diamond fluted tool is provided which is capable of effecting working with much higher accuracy and longer life as compared with the sintered diamond straight fluted tool of the prior art, and is particularly suitable for finishing working with high accuracy. The tool is produced by forming, by a vapor phase synthesis method, a polycrystal diamond film on the surface of a substrate which has been subjected to helical grinding, then subjecting the product to a chemical treatment to dissolve and remove only the substrate, brazing the resulting polycrystal diamond film in a fluted form to at least a part of the rake face of a tool base metal which has been subjected to helical grinding in a similar manner to the substrate, and then subjecting the brazed tool base metal to working of a flank face to form a cutting edge.
REFERENCES:
patent: 2901222 (1959-08-01), Pease, Jr.
patent: 3309772 (1967-03-01), Lieb et al.
patent: 3514828 (1970-06-01), Wale
patent: 4731296 (1988-03-01), Kikuchi
patent: 4884476 (1989-12-01), Okuzumi
Nakai Tetsuo
Nakamura Tsutomu
Parker Roscoe V.
Sumitomo Electric Industries Ltd.
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