END MILL WITH COOLANT HOLES - MITSUBISHI MATERIALS CORP

Title:

END MILL WITH COOLANT HOLES

Document Type and Number:

WIPO Patent Application WO/2014/069265

Kind Code:

A1

Abstract:

An end mill is configured in such a manner that the wear of the clearance face of a long bottom edge at the tip of the end mill body is effectively prevented and that chips which are produced by the long bottom edge is smoothly discharged. Bottom edges (9) are formed at the ridge lines where tip clearance faces (8) and gashes (7) intersect, the gashes (7) being formed at the front ends of chip discharge grooves (4) which are formed in an end mill body (1). At least one of the bottom edges (9) is a long bottom edge (9A) which extends further toward the inner peripheral side than the remaining bottom edges (9B, 9C). Coolant holes (10) are formed in the end mill body (1) at positions between the chip discharge grooves (4). A coolant hole (10A) which is located between a chip discharge groove (4A) which leads to a gash (7A) along which the long bottom edge (9A) is formed and a chip discharge groove (4C) which is located behind the chip discharge groove (4A) in the rotational direction (T) of the end mill is open at the tip clearance face (8A) of the long bottom edge (9A). A coolant hole (10B) which is located between the chip discharge groove (4A) leading to the gash (7A), along which the long bottom edge (9A) is formed, and a chip discharge groove (4B) located in front of the chip discharge groove (4A) in the rotational direction (T) of the end mill is open to the gash (7A), along which the long bottom edge (9A) is formed.

Inventors:

FUKATA KOJI (JP)
AZEGAMI TAKAYUKI (JP)

Application Number:

PCT/JP2013/078436

Publication Date:

May 08, 2014

Filing Date:

October 21, 2013

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP (JP)

International Classes:

B23C5/28; B23C5/10

Foreign References:

JP2001025915A	2001-01-30
JP2004276142A	2004-10-07
JP2003505259A	2003-02-12
JP2005502484A	2005-01-27
JPH08290319A	1996-11-05
JP2003340626A	2003-12-02
DE202009014216U1	2010-02-25
JP3025383B2	2000-03-27
JP4409665B2	2010-02-03

Other References: