Title:
END MILL
Document Type and Number:
WIPO Patent Application WO/2020/170689
Kind Code:
A1
Abstract:
The purpose of the present invention is to perform machining on a double-curved surface to have good finished surface characteristics while achieving high speed feeding. An end mill (2) is provided with a bottom blade (2A) formed in a curved convex and circular arc shape, and a radius blade (2B) located at the edge and formed in a circular arc shape. The bottom blade (2A) has a region where a blade part is not formed on the axis of the end mill (2), and the end mill (2) is further provided with a center blade (2C) in the region of the bottom blade (2A). The center blade (2C) is formed in a circular arc shape with a radius smaller than that of the circular arc part of the bottom blade (2A).
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Inventors:
ETO JUN (JP)
UNNO HIROKAZU (JP)
UNNO HIROKAZU (JP)
Application Number:
PCT/JP2020/001817
Publication Date:
August 27, 2020
Filing Date:
January 21, 2020
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
B23C3/16; B23C5/10
Foreign References:
| JP2001071209A | 2001-03-21 | |||
| JP2010520064A | 2010-06-10 | |||
| US20050025584A1 | 2005-02-03 |
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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