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IJAT Vol.2 No.6 pp. 425-430
doi: 10.20965/ijat.2008.p0425
(2008)

Paper:

Tool Life of Small Diameter Ball End Mill for High Speed Milling of Hardened Steel – Effects of the Machining Method and the Tool Materials –

Hiroyasu Iwabe and Kazufumi Enta

Graduate School of Science and Technology, Niigata University
8050, Ikarashi 2-nocho, Nishi-ku, Niigata 950-2181, Japan

Received:
June 17, 2008
Accepted:
July 18, 2008
Published:
November 5, 2008
Keywords:
ball end mill, high speed milling, hardened steel, tool life, flank wear
Abstract

We studied tool life, flank wear, and machined surface roughness in the high-speed milling of hardened steel on a small ball end mill using a high-speed milling machine. We found that: (1) Cutting edge flank wear increases in proportion to cutting length and the flank wear shape gradually has a resembalance to the shape of the actual cutting length. (2) Long tool life depends on stepdown pick-feed and down-milling conditions. (3) Surface roughness increases in proportion to cutting length, but a low surface roughness of 1.4 μm is obtainable for a 3,800 m cutting length in down-milling. (4) CBN tool flank wear is very low — at least 1/15 th that of carbide tools under down-milling conditions, and a surface roughness of 1.6 μm is obtainable for a 67.2 km cutting length. We verified the effectiveness of CBN tools in high-speed milling of hardened steel under cutting conditions.

Cite this article as:
H. Iwabe and K. Enta, “Tool Life of Small Diameter Ball End Mill for High Speed Milling of Hardened Steel – Effects of the Machining Method and the Tool Materials –,” Int. J. Automation Technol., Vol.2, No.6, pp. 425-430, 2008.
Data files:
References
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Last updated on Nov. 08, 2019