| 摘要 |
PROBLEM TO BE SOLVED: To provide a cemented carbide-made end mill having a long service life without causing abnormal abrasion and blade chipping by chip clogging, by particularly restraining chattering vibration, by performing composite processing at a high speed by one end mill, even in composite processing including longitudinal feed processing, cross-feed processing and inclined cutting required for roughing such as a metal mold. SOLUTION: This cemented carbide-made end mill has a plurality of bottom blade, a plurality of outer peripheral blades and a gash composed of a plurality of gash surfaces. The cemented carbide end mill is characterized in that the plurality of gash surfaces are composed of a first gash surface being a rake surface of the bottom blades, a second gash surface arranged on the rotational center side of a tool shaft of the end mill and a third gash surface arranged on the outer peripheral side of the end mill, and the plurality of outer peripheral blades are different in a helix angle of the outer peripheral blades adjacent in the peripheral direction of an outer peripheral surface in a cross-sectional view perpendicular to the axis of the end mill. COPYRIGHT: (C)2011,JPO&INPIT |
