CN200974139Y - 斜面钻孔麻花钻 - Google Patents

斜面钻孔麻花钻 Download PDF

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Publication number
CN200974139Y
CN200974139Y CN 200620124981 CN200620124981U CN200974139Y CN 200974139 Y CN200974139 Y CN 200974139Y CN 200620124981 CN200620124981 CN 200620124981 CN 200620124981 U CN200620124981 U CN 200620124981U CN 200974139 Y CN200974139 Y CN 200974139Y
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China
Prior art keywords
drilling
inclined plane
drill
cutting edge
twist drill
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Expired - Fee Related
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CN 200620124981
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English (en)
Inventor
陈红云
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Yangdong Co Ltd
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Yangdong Co Ltd
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Priority to CN 200620124981 priority Critical patent/CN200974139Y/zh
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Publication of CN200974139Y publication Critical patent/CN200974139Y/zh
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Abstract

一种斜面钻孔麻花钻,其切削刃为向内凹进的圆弧状,横刃长0.5~1.0mm。本实用新型由于切削刃形状改变,横刃变短,当用于斜面上钻孔,开始时仅最外点和钻尖与斜面接触,受力小,随后钻尖加工出定心部位,改善弯曲变形,钻削稳定性好,从而提高钻孔精度和效率。

Description

斜面钻孔麻花钻
技术领域
本实用新型涉及一种机加工用钻头,尤其是用于斜面钻孔的麻花钻。
背景技术
在零件的加工中,经常碰到要在斜面上钻孔,若采用一般几何形状的麻花钻,虽然用了钻模,也容易偏歪。这是因为钻头刚开始与工件斜面接触时,钻头上的大部分切削刃与工件斜面接触,受力较大,得不到平衡,麻花钻单边切削,加上横刃太长,麻花钻易产生弯曲变形;钻床振动较大,钻套磨损快,钻出的孔尺寸精度不理想,加工效率较低。
实用新型内容
本实用新型的目的在于提供一种在斜面上钻孔时钻削稳定性好,能提高钻孔精度和效率的斜面钻孔麻花钻。
本实用新型的改进之处是切削刃的纵剖面为向内凹进的圆弧,横刃长0.5~1.0mm。
本实用新型由于切削刃为圆弧状,并且横刃也变短,用于斜面上钻孔时,开始瞬间麻花钻的最大外径点和钻尖与斜面接触,此时受力很小;切入一小段后,麻花钻受力增大,但钻尖已加工出定心部位,从而改善了麻花钻的弯曲变形,钻削稳定性好,钻套不易磨损,钻床振动小,使钻孔精度和效率都得到提高。
附图说明
附图为本实用新型结构示意图。
具体实施方式
如图,本实用新型的切削刃1为向内凹进的圆弧状,横刃2长0.6mm,在斜面工件3上钻孔,开始时最外点和钻尖与斜面接触,受力小,随后钻尖进入定心部位,改善弯曲变形,钻削稳定性好,钻孔精度和效率高。

Claims (1)

1、一种斜面钻孔麻花钻,其特征是切削刃的纵剖面为向内凹进的圆弧,横刃长0.5~1.0mm。
CN 200620124981 2006-10-31 2006-10-31 斜面钻孔麻花钻 Expired - Fee Related CN200974139Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620124981 CN200974139Y (zh) 2006-10-31 2006-10-31 斜面钻孔麻花钻

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620124981 CN200974139Y (zh) 2006-10-31 2006-10-31 斜面钻孔麻花钻

Publications (1)

Publication Number Publication Date
CN200974139Y true CN200974139Y (zh) 2007-11-14

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ID=38900433

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200620124981 Expired - Fee Related CN200974139Y (zh) 2006-10-31 2006-10-31 斜面钻孔麻花钻

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CN (1) CN200974139Y (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102728872A (zh) * 2012-06-05 2012-10-17 江苏天工工具有限公司 一种带抽吸装置的斜面钻头

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102728872A (zh) * 2012-06-05 2012-10-17 江苏天工工具有限公司 一种带抽吸装置的斜面钻头

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C19 Lapse of patent right due to non-payment of the annual fee
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