双刃带麻花钻

Double-margin twist drill

Abstract

The invention discloses a double-margin twist drill comprising a cutting part and a handle part, wherein the cutting part comprises a chip guiding groove, a first main cutting edge, a second main cutting edge and a guiding edge, wherein the guiding edge comprises a first margin, a second margin, a third margin and a fourth margin; the first margin and the second margin are connected with the first main cutting edge and are positioned at the periphery of the cutting part; the third margin and the fourth margin are connected with the second main cutting edge and are positioned at the periphery of the cutting part; the first margin and the third margin are in centrosymmetric distribution relative to the rotary center O of the twist drill; and the second margin and the fourth margin are in noncentrosymmetric distribution by the rotary center O of the double-margin twist drill. The double-margin twist drill not only has no influence on the processing and guiding functions of the margins for holes, but also can reduce the cutting torque to minimum.
本发明公开了一种双刃带麻花钻,包括切削部分和柄部,所述切削部分包括导屑槽、第一主切削刃、第二主切削刃和导向刃,所述导向刃包括与第一主切削刃相连接的位于切削部分外周的第一刃带和第二刃带,以及与第二主切削刃相连接的位于切削部分外周的第三刃带和第四刃带,所述第一刃带和第三刃带关于麻花钻回转中心O成中心对称分布,所述第二刃带和第四刃带关于双刃麻花钻回转中心O成中心非对称分布。该双刃带麻花钻既不影响刃带对孔加工导向的功能,又能将切削扭矩降低为最小。

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Cited By (5)

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    CN-104755210-AJuly 01, 2015住友电工硬质合金株式会社Small-diameter drill
    CN-104755210-BMarch 08, 2017住友电工硬质合金株式会社小直径钻头
    CN-104755211-AJuly 01, 2015住友电工硬质合金株式会社Two-edge double margin drill
    EP-2915612-A4June 01, 2016Sumitomo Elec Hardmetal CorpTwo-edge double margin drill
    US-9522428-B2December 20, 2016Sumitomo Electric Hardmetal Corp.Small-diameter drill