CN203236020U - 一种内冷式钻头 - Google Patents

一种内冷式钻头 Download PDF

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Publication number
CN203236020U
CN203236020U CN 201320276881 CN201320276881U CN203236020U CN 203236020 U CN203236020 U CN 203236020U CN 201320276881 CN201320276881 CN 201320276881 CN 201320276881 U CN201320276881 U CN 201320276881U CN 203236020 U CN203236020 U CN 203236020U
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China
Prior art keywords
cooling
drill bit
drill
bit
core body
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Expired - Fee Related
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CN 201320276881
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English (en)
Inventor
朱会昌
赵建敏
刘小兵
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JIANGSU JINGGONG TOOLS Co Ltd
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JIANGSU JINGGONG TOOLS Co Ltd
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Priority to CN 201320276881 priority Critical patent/CN203236020U/zh
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  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

本实用新型公开了一种内冷式钻头,包括钻尖、切削刀刃和冷却孔及钻柄,钻头的切削刀刃体内的芯体为螺旋锥形,所述螺旋锥形为自钻尖到螺旋沟槽尾端的芯体直径逐渐增大。本实用新型具有刚度好、强度大和加工效率高的优点。

Description

一种内冷式钻头
技术领域:
本实用新型涉及一种钻头,特别是适用于高强度要求的内冷式钻头。
背景技术:
内冷式钻头在钻头切削部分设有冷却孔,使芯体的横截面积更小,现有的内冷式钻头为了获得较大的刚度和强度而采用增大钻头芯体的截面积和厚度,这种结构增大了切削阻力,钻头磨损加快,通常是通过修磨横刃减小芯体厚度,然而修磨横刃难以保证一致性,极易使钻头磨损、掉块和折断,且加工效率低。
发明内容:
本实用新型的目的是提供一种刚性好、强度大和加工效率高的一种内冷式钻头。
实现本实用新型目的的技术方案是,一种内冷式钻头,包括钻尖、切削刀刃和冷却孔及钻柄,其特征在于:钻头的切削刀刃体内的芯体为螺旋锥形,所述螺旋锥形为自钻尖到螺旋沟槽尾端的芯体直径逐渐增大。
本实用新型与现有技术比较具有刚度好、强度大和加工效率高的优点。
附图说明:
图1是本实用新型的主视图;图2是图1的沿轴线的剖面图。
具体实施方式: 
结合以上附图对本实用新型详细说明,为了解决现有技术存在的缺陷,本实用新型采用的技术方案是,使钻头的切削刀刃体2内的芯体5为螺旋锥形,即自钻尖1到螺旋沟槽4尾端逐渐增大,而对钻尖、切削刀刃和钻柄3未作改变。这种锥形芯体结构的内冷式钻头的刚性和强度自钻尖到后端逐渐增大,同时这种前部尖后部大的锥形结构减小了轴向阻力的效果。

Claims (1)

1.一种内冷式钻头,包括钻尖、切削刀刃和冷却孔及钻柄,其特征在于:钻头的切削刀刃体内的芯体为螺旋锥形,所述螺旋锥形为自钻尖到螺旋沟槽尾端的芯体直径逐渐增大。
CN 201320276881 2013-05-21 2013-05-21 一种内冷式钻头 Expired - Fee Related CN203236020U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320276881 CN203236020U (zh) 2013-05-21 2013-05-21 一种内冷式钻头

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320276881 CN203236020U (zh) 2013-05-21 2013-05-21 一种内冷式钻头

Publications (1)

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CN203236020U true CN203236020U (zh) 2013-10-16

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Family Applications (1)

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CN 201320276881 Expired - Fee Related CN203236020U (zh) 2013-05-21 2013-05-21 一种内冷式钻头

Country Status (1)

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CN (1) CN203236020U (zh)

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20131016

Termination date: 20170521