Title:
DEEP HOLE DRILLING MACHINE
Document Type and Number:
WIPO Patent Application WO/2007/116620
Kind Code:
A1
Abstract:
A deep hole drilling machine employing an external system for supplying coolant
to a drilling portion in which high drilling efficiency can be achieved even if
the drilling hole is deep by enhancing the discharge performance of chips from
the drilling portion without setting the supply pressure of coolant at a high
level. A tubular boring head (2) having discharging openings (4a, 4b) communicating
with a chip discharge passage (10) on the edge (3a-3c) side is attached to the distal
end of a hollow boring bar (1) having interior serving as the chip discharge passage
(10), bypass holes (5,...) are provided at a plurality of circumferential positions
in the circumferential wall (21) of the boring head (2) to penetrate obliquely
such that the outer opening (5a) is located closer to the distal end side of the
head than the inner opening (5b), and a part of coolant supplied externally to
the drilling portion side flows through the bypass holes (5,...) into the boring
head (2), thus generating attraction force to the discharge side and accelerating
discharge of the chips (S).
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Inventors:
NOMURA, Takuji (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 6610033, JP)
野村 倬司 (〒33 兵庫県尼崎市南武庫之荘３丁目２３－２１ ユニタック株式会社内 Hyogo, 6610033, JP)
野村 倬司 (〒33 兵庫県尼崎市南武庫之荘３丁目２３－２１ ユニタック株式会社内 Hyogo, 6610033, JP)
Application Number:
JP2007/054164
Publication Date:
October 18, 2007
Filing Date:
March 05, 2007
Export Citation:
Assignee:
UNITAC, Incorporated (23-21, Minamimukonoso 3-chome Amagasaki-sh, Hyogo 33, 6610033, JP)
ユニタック株式会社 (〒33 兵庫県尼崎市南武庫之荘３丁目２３－２１ Hyogo, 6610033, JP)
NOMURA, Takuji (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 6610033, JP)
ユニタック株式会社 (〒33 兵庫県尼崎市南武庫之荘３丁目２３－２１ Hyogo, 6610033, JP)
NOMURA, Takuji (Incorporated 23-21 Minamimukonoso 3-chome, Amagasaki-sh, Hyogo 33, 6610033, JP)
International Classes:
B23B51/06
Attorney, Agent or Firm:
FUJIKAWA, Tadashi (1-22, Nagasunishidori 1-chome Amagasaki-sh, Hyogo 07, 6600807, JP)
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