JPS5836018U

JPS5836018U - Drill for deep hole cutting

Info

Publication number: JPS5836018U
Application number: JP13222881U
Authority: JP
Inventors: 倬司野村
Original assignee: 株式会社日本治金
Priority date: 1981-09-04
Filing date: 1981-09-04
Publication date: 1983-03-09
Also published as: JPS6137453Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例を示す正面図、第２図は
同平面図、第３図は同要部たる切削刃部分を示す正面図
、第４図は第３図におけるＩＶ−ＩＶ線断面部分の切削
状態を示す図、第５図は同じく第３図における■−■線
断面部分の切削状態を示す図、第６図乃至第９図はそれ
ぞれこの考案の他の実施例を示す要部平面図、第１０図
及び第１１図はこの種の従来例を示す切削刃部分の正面
図、第１２図はこの従来例による切削くずの生成状態を
示す図である。１・・・ドリル本体、２・・・ドリルヘッド、４・・・
切削刃、５・・・刃先部、５ａ・・・刃先部のアウタエ
ツジ、５ｂ・・・刃先部のインナエツジ、６・・・チッ
プブレーカ、７・・・平端面、０・・・回転軸心、Ｐ・
・・半径線。FIG. 1 is a front view showing an embodiment of this invention, FIG. 2 is a plan view of the same, FIG. 3 is a front view showing the main part of the cutting blade, and FIG. 4 is an IV-- FIG. 5 is a diagram showing the cutting state of the section taken along the line IV, FIG. 5 is a diagram showing the cutting state of the section taken along the line ■-■ in FIG. 3, and FIGS. 6 to 9 show other embodiments of this invention. 10 and 11 are front views of a cutting blade portion showing a conventional example of this type, and FIG. 12 is a diagram showing the state of generation of cutting waste according to this conventional example. 1...Drill body, 2...Drill head, 4...
Cutting blade, 5... Cutting edge portion, 5a... Outer edge of the cutting edge portion, 5b... Inner edge of the cutting edge portion, 6... Chip breaker, 7... Flat end surface, 0... Rotation axis center, P.
...Radius line.

Claims

[Claims for Utility Model Registration] 1. A cutting blade is attached to the drill head in a radial direction from the rotational axis, and a substantially mountain-shaped cutting edge portion consisting of an outer edge on the outer peripheral side and an inner edge on the axial center side is applied to the cutting force. 1. A deep hole cutting drill comprising: a chip breaker formed on the end face of the outer edge or from the end face of the outer edge to a part of the end face of the inner edge. 2. The deep hole cutting drill according to claim 1, wherein the outer edge of the cutting edge portion is formed on a radial line of the rotation axis of the drill head. -3 The deep hole cutting drill according to claim 1, wherein the outer edge of the cutting edge portion is formed to protrude tangentially from a radial line of the rotation axis of the drill head. 4. The deep hole cutting drill according to claim 1, wherein the outer edge of the cutting edge portion is formed by being recessed in a tangential direction from a radial line of the rotation axis of the drill head. 5. The deep hole cutting drill according to claim 1, wherein both the outer edge and the inner edge of the cutting edge portion are formed to protrude tangentially from a radial line of the rotation axis of the drill head.