JPH0451318U - - Google Patents

Info

Publication number
JPH0451318U
JPH0451318U JP9225390U JP9225390U JPH0451318U JP H0451318 U JPH0451318 U JP H0451318U JP 9225390 U JP9225390 U JP 9225390U JP 9225390 U JP9225390 U JP 9225390U JP H0451318 U JPH0451318 U JP H0451318U
Authority
JP
Japan
Prior art keywords
drill
cutting edge
tip
width
edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9225390U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP9225390U priority Critical patent/JPH0451318U/ja
Publication of JPH0451318U publication Critical patent/JPH0451318U/ja
Pending legal-status Critical Current

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  • Drilling Tools (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本考案ドリルの一実施例を示す正面
図、第２図は、その一部側面図、第３図は、拡大
底面図、第４図ａ〜ｃは、面取り部分の状態を一
部示す図で、第４図ａは、正面図、第４図ｂは、
平面図、第４図ｃは、側面図、第５図は、切屑の
カーリング状況を示す説明、第６図は、変形例を
示す拡大底面図である。 １……ドリル本体、４……先端切刃稜、６……
外周切刃稜、７……面取り部分、８……先端逃げ
面、９……油穴。 Fig. 1 is a front view showing one embodiment of the drill of the present invention, Fig. 2 is a partial side view thereof, Fig. 3 is an enlarged bottom view, and Figs. 4 a to c show the state of the chamfered portion. Partially shown, Figure 4a is a front view, Figure 4b is a
FIG. 4c is a plan view, FIG. 4c is a side view, FIG. 5 is an explanation showing the state of curling of chips, and FIG. 6 is an enlarged bottom view showing a modification. 1...Drill body, 4...Tip cutting edge ridge, 6...
Outer cutting edge ridge, 7... Chamfered portion, 8... Tip flank, 9... Oil hole.

Claims (1)

【実用新案登録請求の範囲】 (1) ドリル本体１の先端には、先端切刃稜４が
形成され、軸方向には、外周切刃稜６が形成され
るとともに、これらの先端切刃稜４および外周切
刃稜６が交差するコーナには、面取り部分７が備
えられるようにしたドリルにおいて、 前記面取り部分７は、外周切刃稜６に沿つて略
長方形を呈しており、その面取り角θが４５°以
下で、その幅がドリル径Ｄを基準としたときに、
先端視方向からの幅ａおよび側面視方向からの幅
ｂが 1/4Ｄ＞ａ＞ｂ＞Ｄの関係にあるように設
定されていることを特徴とするドリル。 (2) 前記ドリル本体１には、先端逃げ面８側に
油穴９が開口している請求項１記載のドリル。[Claims for Utility Model Registration] (1) A tip cutting edge ridge 4 is formed at the tip of the drill body 1, and an outer peripheral cutting edge ridge 6 is formed in the axial direction, and these tip cutting edge ridges are formed in the axial direction. In the drill, a chamfered portion 7 is provided at the corner where the outer cutting edge edge 6 and the outer cutting edge edge 6 intersect. When θ is 45° or less and its width is based on the drill diameter D,
A drill characterized in that a width a from a distal end view direction and a width b from a side view direction are set such that 1/4D>a>b>D. (2) The drill according to claim 1, wherein the drill body 1 has an oil hole 9 opened on the tip flank 8 side.
JP9225390U 1990-08-31 1990-08-31 Pending JPH0451318U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9225390U JPH0451318U (en) 1990-08-31 1990-08-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9225390U JPH0451318U (en) 1990-08-31 1990-08-31

Publications (1)

Publication Number Publication Date
JPH0451318U true JPH0451318U (en) 1992-04-30

Family

ID=31828563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9225390U Pending JPH0451318U (en) 1990-08-31 1990-08-31

Country Status (1)

Country Link
JP (1) JPH0451318U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097474A1 (en) * 2006-02-23 2007-08-30 National University Corporation Tokyo University Of Agriculture And Technology Nonaxisymmetrical blade drill
CN102470452A (en) * 2009-07-14 2012-05-23 克莱斯博士玛帕精密仪器工厂两合公司 Drill
WO2017084652A1 (en) * 2015-11-18 2017-05-26 Jens Mayer Machining tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097474A1 (en) * 2006-02-23 2007-08-30 National University Corporation Tokyo University Of Agriculture And Technology Nonaxisymmetrical blade drill
CN102470452A (en) * 2009-07-14 2012-05-23 克莱斯博士玛帕精密仪器工厂两合公司 Drill
JP2012532763A (en) * 2009-07-14 2012-12-20 マパル ファブリック フュール プラツィジョンズベルクゼウグ ドクトル．クレス カーゲー drill
WO2017084652A1 (en) * 2015-11-18 2017-05-26 Jens Mayer Machining tool

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