DRILLING TOOL AND METHOD FOR MANUFACTURING THE SAME

DRILLING TOOL AND METHOD FOR MANUFACTURING THE SAME

To provide a drilling tool and a method for manufacturing the same, with which electroconductivity is ensured between a tool point and a material being drilled, and any decrease in drilling quality can be minimized more so than with a non-coated drill. A drilling tool in which one or more helical ch...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: WATANABE, Masahide, SATO, Masayasu
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Beschreibung
Zusammenfassung:To provide a drilling tool and a method for manufacturing the same, with which electroconductivity is ensured between a tool point and a material being drilled, and any decrease in drilling quality can be minimized more so than with a non-coated drill. A drilling tool in which one or more helical chip-evacuating flutes (2) are provided, from a tool point to a base, in an outer circumference of a tool main body (1) having a coating film (5) covering a tool base material made of a cemented carbide, and one or more cutting edges (4) are provided at intersecting ridge lines of the chip-evacuating flutes (2) and a point relief (3), wherein a point of the tool main body (1) is provided with an exposed part (6) in which there is no coating film (5) and the tool base material is exposed, and certain ranges at tool-outer-circumference sides of the cutting edges (4) are covered by the coating film (5).