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Drill blank, method for manufacturing drill blank, drill, and method for manufacturing drill
A drill includes a drill blank brazed thereto in an elongated columnar-shape and made of cemented carbide. In the drill blank, both dA and dB are equal to or smaller than 2 mm, dA≧dB>dC, a ratio of the length to dA is equal to or larger than 3, and dB/dA=0.96 to 1 and dC/dA=0.9 to 0.995 in a longitudinal direction, where dA indicates the diameter of one end of both ends, dB indicates the diameter of the other end thereof, and dC indicates the minimum diameter of a central portion. Brazing of the drill blank is easy and precision in brazing is enhanced.
Drill blank, method for manufacturing drill blank, drill, and method for manufacturing drill
A drill includes a drill blank brazed thereto in an elongated columnar-shape and made of cemented carbide. In the drill blank, both dA and dB are equal to or smaller than 2 mm, dA≧dB>dC, a ratio of the length to dA is equal to or larger than 3, and dB/dA=0.96 to 1 and dC/dA=0.9 to 0.995 in a longitudinal direction, where dA indicates the diameter of one end of both ends, dB indicates the diameter of the other end thereof, and dC indicates the minimum diameter of a central portion. Brazing of the drill blank is easy and precision in brazing is enhanced.
Drill blank, method for manufacturing drill blank, drill, and method for manufacturing drill
MATSUSHITA SHIGERU (author) / YAMADA TADAYUKI (author)
2017-01-31
Patent
Electronic Resource
English
IPC:
B23P
Sonstige Metallbearbeitung
,
OTHER WORKING OF METAL
/
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
B23B
Drehen
,
TURNING
/
B23K
Löten
,
SOLDERING OR UNSOLDERING
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
B30B
PRESSES IN GENERAL
,
Pressen allgemein
/
C04B
Kalk
,
LIME
/
C22C
Legierungen
,
ALLOYS