CN2303698Y - 台阶式麻花钻 - Google Patents

台阶式麻花钻 Download PDF

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Publication number
CN2303698Y
CN2303698Y CN 97224883 CN97224883U CN2303698Y CN 2303698 Y CN2303698 Y CN 2303698Y CN 97224883 CN97224883 CN 97224883 CN 97224883 U CN97224883 U CN 97224883U CN 2303698 Y CN2303698 Y CN 2303698Y
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blade
stage
fluted drill
drill
diameter
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周丽华
由光宇
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Abstract

本实用新型是一种至少由两级刃部组成的台阶式麻花钻,从刃尖部起为第1级,该级直径最小,长度最短,逐级增大,形成台阶,两级刃部之间有过渡刃,刃尖及每级过渡刃有锋角,台阶式麻花钻可实现一个钻头即可钻出不同孔径的孔,钻大孔无须更换钻头,省时、省力。

Description

台阶式麻花钻
本实用新型涉及一种用于钻孔的刀具,特别是涉及一种由一根钻头即可完成小孔眼钻削及对小孔眼扩孔的台阶式麻花钻。
传统的直柄或锥柄麻花钻,都是一根钻头一种规格,只能钻一种孔径的孔,当要钻一大孔径的孔,如对小孔卧孔或钻一个大的通孔时,就要用二根不同直径的麻花钻才能完成,先用一根直径小的钻头钻一小孔,再换一直径大的钻头,把小孔扩大成所需要的孔径,这样加工一个大孔要钻两次,而且要更换钻头,既费时,又费力,另外直柄麻花钻的柄部为圆柱形,虽然生产厂家容易生产,但在使用中,往往出现钻卡卡不住钻头的情形。
本实用新型的目的在于,提供一种由一根钻头即可钻出不同孔径的孔的台阶式麻花钻,以克服已有技术的不足。
以下方式可实现本实用新型:
台阶式麻花钻,分为刃部及柄部,至少由两极刃部组成,从刃尖部起为第1级,该级直径最小,纵向长度最短,逐级增大,两级直径不等的刃部之间有与刃尖部同样切削角度的过渡刃,刃沟自刃尖部起贯通各级刃部。
每相邻级刃部的直径及长度尺寸为倍数关系。
本实用新型由至少两级直径不同,长度不等的刃部构成,形成台阶,一根钻头即可钻出小孔及对小孔的扩孔,直至钻出大孔,使经二次以上钻削才能完成的大孔眼,为一次完成,省时、省力,截面为三角形的柄部,更易卡紧。
图1为本实用新型结构示意图;
图2是图1的剖面图;
实施例:
以两级刃部组成的台阶式麻花钻为例,第1级刃部见图中的2,直径为5mm,刃部长10mm,4是第2级刃部,直径为10mm,刃部长80mm,第1级刃部2和第2级刃部之间是一截圆锥形过渡刃3,刃尖1和过渡刃3都有118--120°的锋角,刃沟6自刃尖1起始贯通第1级及第2级刃部,以便于排屑,柄部5的截面为等边三角形,柄部7还可以圆柱形直柄或锥形柄。当第一级刃部长在0-5mm之间时,即成为双刃尖部钻头。

Claims (5)

1、一种台阶式麻花钻,分为刃部和柄部,其特征是:至少由两级刃部组成,从刃尖部起为第1级,该级直径最小,纵向长度最短,逐级增大,两级直径不等的刃部之间有与刃尖部同样切削角度的过渡刃,刃沟自刃尖部起贯通各级刃部。
2、根据权利要求1所述的麻花钻,其特征是:每相邻级刃部的直径及纵向长度尺寸为倍数关系。
3、根据权利要求1所述的麻花钻,其特征是:靠近柄部一级刃部的纵向长度大于或等于前几段刃部纵向长度的总和。
4、根据权利要求1所述的麻花钻,其特征是:刃尖部与各级过渡刃的切削角度相同。
5、根据权利要求1所述的麻花钻,其特征是:柄部截面为等边三角形。
CN 97224883 1997-08-30 1997-08-30 台阶式麻花钻 Expired - Fee Related CN2303698Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 97224883 CN2303698Y (zh) 1997-08-30 1997-08-30 台阶式麻花钻

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Application Number Priority Date Filing Date Title
CN 97224883 CN2303698Y (zh) 1997-08-30 1997-08-30 台阶式麻花钻

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CN2303698Y true CN2303698Y (zh) 1999-01-13

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102189286A (zh) * 2011-06-03 2011-09-21 开平依利安达电子第五有限公司 一种改善线路板插件孔品质的刀具
CN101722323B (zh) * 2008-10-24 2012-04-18 佑能工具株式会社 钻孔工具
WO2012058863A1 (zh) * 2010-11-04 2012-05-10 Li Shiqing 一种复合定位复合切削的定心螺旋刀具
CN104416202A (zh) * 2013-09-02 2015-03-18 天工爱和特钢有限公司 多段钻头
US9579732B2 (en) 2012-07-18 2017-02-28 Milwaukee Electric Tool Corporation Hole saw
CN108166930A (zh) * 2017-12-29 2018-06-15 重庆邦略投资有限公司 一种石头钻头
US11148212B2 (en) 2018-07-10 2021-10-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw
US12059734B2 (en) 2019-06-20 2024-08-13 Milwaukee Electric Tool Corporation Hole saw with circular sidewall openings

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101722323B (zh) * 2008-10-24 2012-04-18 佑能工具株式会社 钻孔工具
WO2012058863A1 (zh) * 2010-11-04 2012-05-10 Li Shiqing 一种复合定位复合切削的定心螺旋刀具
CN102189286A (zh) * 2011-06-03 2011-09-21 开平依利安达电子第五有限公司 一种改善线路板插件孔品质的刀具
USRE48513E1 (en) 2012-07-18 2021-04-13 Milwaukee Electric Tool Corporation Hole saw
US9579732B2 (en) 2012-07-18 2017-02-28 Milwaukee Electric Tool Corporation Hole saw
US10086445B2 (en) 2012-07-18 2018-10-02 Milwaukee Electric Tool Corporation Hole saw
US10751811B2 (en) 2012-07-18 2020-08-25 Milwaukee Electric Tool Corporation Hole saw
US11084108B2 (en) 2012-07-18 2021-08-10 Milwaukee Electric Tool Corporation Hole saw
US11084107B2 (en) 2012-07-18 2021-08-10 Milwaukee Electric Tool Corporation Hole saw
US11745273B2 (en) 2012-07-18 2023-09-05 Milwaukee Electric Tool Corporation Hole saw
CN104416202A (zh) * 2013-09-02 2015-03-18 天工爱和特钢有限公司 多段钻头
CN108166930A (zh) * 2017-12-29 2018-06-15 重庆邦略投资有限公司 一种石头钻头
US11148212B2 (en) 2018-07-10 2021-10-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
US11845134B2 (en) 2018-07-10 2023-12-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
US12059734B2 (en) 2019-06-20 2024-08-13 Milwaukee Electric Tool Corporation Hole saw with circular sidewall openings
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw

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