Title:
DRILL HEAD FOR BORING DEEP HOLE
Document Type and Number:
WIPO Patent Application WO/2006/132068
Kind Code:
A1
Abstract:
A drill head for boring a deep hole capable of increasing boring accuracy by improving the roundness and the straightness of the hole. The drill head for boring the deep hole is formed by fixing a cutting edge (2) to the tip face side of a head body (1) and guide pads (3) and (4) to the tip outer peripheral side of the head body (1). The axial length (Lm) of a margin part (6) formed on the outer peripheral part tip side of the cutting edge (2) in the drill rotating direction and the axial lengths (Lp) of the guide pads (3) and (4) are determined to be substantially equal to each other, and the tip and rear end positions of the margin part (6) are aligned substantially with the tip and rear end positions of the guide pads (3) and (4) in the circumferential direction.
Inventors:
Nomura, Takuji c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Sakai, Makoto c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Sakai, Makoto c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Application Number:
PCT/JP2006/310019
Publication Date:
December 14, 2006
Filing Date:
May 19, 2006
Export Citation:
Assignee:
UNITAC, Incorporated (23-21, Minamimukonoso 3-chome Amagasaki-sh, Hyogo 33, 66100, JP)
Nomura, Takuji c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Sakai, Makoto c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Nomura, Takuji c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
Sakai, Makoto c/o Unitac (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 66100, JP)
International Classes:
B23B51/00
Attorney, Agent or Firm:
Fujikawa, Tadashi (1-22, Nagasunishidori 1-chome Amagasaki-sh, Hyogo 07, 66008, JP)
Download PDF: