THROWAWAY REAMER

Japanese Patent JP3876577

B2

PROBLEM TO BE SOLVED: To provide a throwaway reamer preventing generation of damage in a prepared hole by a cutting blade in the case the reamer is extracted from the prepared hole finish worked in a workpiece.
SOLUTION: In this throwaway reamer, providing a throwaway chip 8 protruded to an external peripheral side of a tool main unit rotated around an axial line C in its tip end part and providing a guide pad protruded to the external peripheral side of the tool main unit to be extended in a direction of the axial line C, a land 8d having a circular arc surface (arc-shaped external peripheral surface) 8e of radius R2 of rotation with a center C1 serving as the center is provided, in a manner wherein a radius of rotation with the axial line C serving as the center is gradually lessened as the land goes toward a rearward side of a cut rotational direction T from a cutting blade 8a, in a rake face 8b facing the external peripheral side of the tool main unit of the throwaway chip 8. A width E of the land 8d is set to within a range from 0.01 mm to a half the thickness of the throwaway chip 8.

Osamu Tsujimura
Masaharu Takiguchi
Otsuka Yuji

JP32614199A

January 31, 2007

November 16, 1999

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Mitsubishi Materials Corporation

B23D77/02; (IPC1-7): B23D77/02

JP3533375Y1
JP7251323A
JP866826A
JP223925U
JP6170640A

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Yutaka Matsutomi
Kazuya Nishi
Yasuhiko Murayama

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