JPS60117013U

JPS60117013U - carbide drill

Info

Publication number: JPS60117013U
Application number: JP496884U
Authority: JP
Inventors: 博下村; 斉藤　勝利; 修一ノ関
Original assignee: 三菱マテリアル株式会社
Priority date: 1984-01-18
Filing date: 1984-01-18
Publication date: 1985-08-07

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 drawings]

第１図ないし第３図は従来のドリルの一例を示し、第１
図はその底面視図、第２図、第３図はそれぞれ第１図の
■矢視、■矢視図、第４図ないし第６図は従来のドリル
の他の例を示し、第４図はその底面視図、第５図、第６
図はそれぞれ第４図の■矢視、■矢視図、第７図ないし
第１１図はこの考案の一実施例を示し、第７図はその底
面視図、第８図、第９図はそれぞれ第７図の■矢視、■
矢視図、第１０図は第８図のＸ−Ｘ線矢視断面図、第１
１図は第７図のＸＩ−ＸＩＸ線矢視断面図第１２図Ａ、
　Ｂは第４薗ないし第６図に示す従来のドリルとこの考
案に係る超硬ドリルとの実験データを示す図、第１３図
、第１４図はそれぞれこの考案の他の実施例を示す第１
１図と同様の図である。１１・・・・・・ドリル本体、１２・・・・・・切屑排
出溝、１３・・・・・・チゼル、１４．１５・・・・・
・平坦面、１６・・・・・・逃げ面、１７・・・切刃、
１８・・・チップポケット。Figures 1 to 3 show an example of a conventional drill.
The figure is a bottom view, FIGS. 2 and 3 are views from the ■ arrow and ■ arrow in FIG. 1, respectively. FIGS. 4 to 6 show other examples of the conventional drill, and FIG. are its bottom views, Figures 5 and 6.
The figures are respectively a view from the ■ arrow and a view from the ■ arrow in FIG. View from the ■ arrow in Figure 7, and ■ respectively.
Fig. 10 is a sectional view taken along the line X-X of Fig. 8, Fig. 1
Figure 1 is a sectional view taken along the line XI-XIX in Figure 7; Figure 12A;
B is a diagram showing experimental data of the conventional drill shown in FIGS. 4 to 6 and the carbide drill according to this invention, and FIGS.
It is a figure similar to figure 1. 11...Drill body, 12...Chip discharge groove, 13...Chisel, 14.15...
・Flat surface, 16... flank surface, 17... cutting edge,
18... Chip pocket.

Claims

[Scope of utility model registration request]

The core thickness is set to 0.3D to 0.4D (D is the diameter of the drill), and the helix angle is 30° to 40° on the outer periphery of the tip of the drill body.
In the drill, a pair of chip discharge grooves are formed with a width of 0.degree., and a chisel is formed between a pair of flank surfaces formed on the tip surface of the drill body, the width of the chisel being 0.degree.
By thinning approximately along the chip evacuation groove so that the angle becomes 0.03D to 0.1D, the angle between the tips of the wall surfaces defining the chip ejection groove is 100° to 150°.
Two flat surfaces are formed, the one facing the direction of rotation extends from the outer circumference to the chisel, and has an axial rake angle of 0° to 15°; A carbide drill, characterized in that a cutting edge is formed at an intersecting ridge formed by a flat surface facing the rotation direction and the flank surface, and further, at least a tip portion of the drill body is made of a cemented carbide.