Ball end mill

ボールエンドミル

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent finishing surface by securely suppressing a chattering vibration in a cutting machining using an end cutting edge of a ball end mill. SOLUTION: In the ball end mill, a plurality of end cutting edges 7 where a rotating trajectory around an axis line O is in a projective semi-spherical shape of an end mill body 1 are formed at the tip of the end mill body 1 rotating around the axis line O. The plurality of end cutting edges 7 is made to be a convex curve which is convex to the rotating direction T side of the end mill body 1 as seen from the tip in the axis line O direction. The curvature radius of the convex curve where at least the end cutting edge 7a of the end mill body 1 among these end cutting edges 7 is made as seen from the tip in the axis line O direction is made as a different curvature radius of the convex curve where the other end cutting edge 7b are made as seen from the tip in the axis line O direction. COPYRIGHT: (C)2006,JPO&NCIPI
【課題】 ボールエンドミルによる底刃を用いた切削加工において、ビビリ振動の発生を確実に抑えて良好な仕上げ面を得る。 【解決手段】 軸線O回りに回転されるエンドミル本体1の先端部に、軸線O回りの回転軌跡が1の凸半球状をなす複数の底刃7が形成されてなるボールエンドミルであって、これら複数の底刃7は、軸線O方向先端視にエンドミル本体1の回転方向T側に凸となる凸曲線をなすとともに、これらの底刃7のうち少なくとも1の底刃7aが軸線O方向先端視になす凸曲線の曲率半径が、他の底刃7bが軸線O方向先端視になす凸曲線の曲率半径と異なる大きさとされている。 【選択図】 図2

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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    JP-H0476310-UJuly 03, 1992
    JP-H063516-UJanuary 18, 1994三菱マテリアル株式会社ソリッドエンドミル

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Cited By (13)

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    CN-102497950-AJune 13, 2012三菱综合材料株式会社Ball end mill
    CN-102497950-BJuly 16, 2014三菱综合材料株式会社球头立铣刀
    JP-2010214500-ASeptember 30, 2010Mitsubishi Materials Corp, 三菱マテリアル株式会社ボールエンドミル
    JP-2011056649-AMarch 24, 2011Mitsubishi Materials Corp, 三菱マテリアル株式会社ボールエンドミル
    JP-2015062978-AApril 09, 2015京セラ株式会社, Kyocera CorpBall end mill
    JP-5869691-B2February 24, 2016京セラ株式会社ボールエンドミル
    KR-101740423-B1May 26, 2017쿄세라 코포레이션Ball end mill
    US-2012039677-A1February 16, 2012Kennametal Inc.Contour end mill
    US-2012170984-A1July 05, 2012Mitsubishi Materials CorporationBall end mill
    US-2015224585-A1August 13, 2015Kyocera CorporationBall end mill
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    WO-2011030854-A1March 17, 2011三菱マテリアル株式会社Fraise a embout spherique
    WO-2014069453-A1May 08, 2014京セラ株式会社Laminoir à extrémité sphérique