JPS60175513U

JPS60175513U - drill structure

Info

Publication number: JPS60175513U
Application number: JP6436584U
Authority: JP
Inventors: 良克森
Original assignee: 住友電気工業株式会社
Priority date: 1984-05-02
Filing date: 1984-05-02
Publication date: 1985-11-20
Also published as: JPS6246490Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来一般の切刃素材に超硬合金を用いたドリル
の先端上面図、第２図は第１図側面図、第３図は面取り
説明の第２図Ｘ−Ｘ断面図、第４図以下はこの考案の実
施例の説明図であり、第４図は１実施例の上面図、第５
図は第４図側面図、第６図は第５図ｙ−ｙｉｆｒｍ図、
第７図は第５図２−２断面図、第８図は他の実施例の上
面図、第９図は第８図側面図、第１０図は第９図Ｙ−Ｙ
断面図、第１１図は第９図ｚ−Ｚ断面図、第１２図はサ
ンプルドリルの加工大数とその寿命の関係説明グラフ図
第１３図は加工穴数と外周逃げ面最大験耗関係説明グラ
フ図である。２・・・切刃、５・・・すくい面、６・・・逃げ面、４
′。４″・・・面取り、１′、１″・・・ドリル、１・・・
面取り幅、θ・・・面取り角。Fig. 1 is a top view of the tip of a conventional drill using cemented carbide as the cutting edge material, Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view taken along line XX of Fig. 2 for explaining chamfering, Figure 4 and the following are explanatory diagrams of embodiments of this invention. Figure 4 is a top view of one embodiment,
The figure is a side view of Figure 4, Figure 6 is a y-yifrm diagram of Figure 5,
7 is a sectional view taken along the line 2-2 in FIG. 5, FIG. 8 is a top view of another embodiment, FIG. 9 is a side view shown in FIG. 8, and FIG.
11 is a sectional view taken along the Z-Z line in FIG. 9, and FIG. 12 is a graph explaining the relationship between the number of machining holes of a sample drill and its life. It is a graph diagram. 2... Cutting edge, 5... Rake face, 6... Flank surface, 4
'. 4"...Chamfer, 1', 1"...Drill, 1...
Chamfer width, θ... Chamfer angle.

Claims

[Scope of utility model registration request]

(1) In a drill structure in which cemented carbide is used as the cutting edge material and a chamfer is formed at the intersection of the rake face and flank face, the chamfer angle is 10" to 45" with respect to the drill axis.
The chamfer width is within the range of 0.03 to 0.
．． The drill structure is characterized by the size of three cabinets, which are large near the center and small near the periphery, with a ratio of 3:1 to 2:1.

(2) A drill structure characterized in that the chamfer angle is larger near the center and smaller near the periphery.

(3) The ratio of the center and circumference of the above chamfer angle is 3:1
A drill structure characterized by a ratio of ~2:1.