Title:
刃先交換式ボールエンドミル
Document Type and Number:
Japanese Patent JP5060626
Kind Code:
B2
Abstract:
. An indexable ball end mill comprising first to third inserts having arcuate cutting edges detachably attached with first to third screws to first to third seats in a semispherical tip end portion of a tool body; a first threaded hole for the first screw slantingly penetrating a slit-shaped first seat; the first insert having an inclined hole to avoid interference between the first screw and the second and third screws; a hole of the first insert and the first screw having at least partially finished surfaces, so that when the first screw penetrates the first insert attached to the first seat, the first insert is precisely positioned by tight engagement of both finished surfaces.
Inventors:
Nagashima Yumi
Yoshiyuki Kobayashi
Haruhisa Hikasayama
Seiji Niwa
Yoshiyuki Kobayashi
Haruhisa Hikasayama
Seiji Niwa
Application Number:
JP2011046814A
Publication Date:
October 31, 2012
Filing Date:
March 03, 2011
Export Citation:
Assignee:
Hitachi Tool Co., Ltd.
TOYOTA JIDOSHA KABUSHIKI KAISHA
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B23C5/22; B23C5/10
Domestic Patent References:
| JP7164233A | ||||
| JP2003511248A | ||||
| JP60085815A | ||||
| JP2001121339A | ||||
| JP54029490U |
Attorney, Agent or Firm:
Takaishi Tachibana