JPS5924211U

JPS5924211U - Drill

Info

Publication number: JPS5924211U
Application number: JP11978782U
Authority: JP
Inventors: 水木　叔知
Original assignee: ダイジヱツト工業株式会社
Priority date: 1982-08-05
Filing date: 1982-08-05
Publication date: 1984-02-15

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]

図は、いずれも本考案によるもので、第１図は、この考
案のドリルの正面図を示し、第２図は第１図の要部の側
面図で、第３図は第１図の底面図であり、第４図は他の
実施例を示す底面図などである。１・・・シャンク本体、１１・・・柄部、１２・・・軸
部、１３．１３□・・・ねじれ溝、２，２１・・・超硬
合金製チップ、２２，２２．・・・中心側切刃、２３．
２３□・・・外周側′切刃、２４．２４□・・・円弧切
刃、２５゜２５１・・・すくい面。The figures are all based on the present invention; Fig. 1 shows a front view of the drill of this invention, Fig. 2 is a side view of the main part of Fig. 1, and Fig. 3 is a bottom view of the drill of Fig. 1. FIG. 4 is a bottom view showing another embodiment. DESCRIPTION OF SYMBOLS 1...Shank body, 11...Handle part, 12...Shaft part, 13.13□...Twisted groove, 2,21...Cemented carbide tip, 22,22. ...Central side cutting edge, 23.
23□...Outer peripheral side' cutting edge, 24.24□...Circular cutting edge, 25°251...Rake face.

Claims

[Scope of utility model registration request]

In a drill having a cutting blade made of cemented carbide, the ridge line of the cutting blade that cuts near the center is a straight line or a broken line, and this and a curved line or straight line that cuts the outer peripheral side, or a line that is a combination of the above ridge lines. A drill characterized in that a cutting edge is continuous and a rake face is continuously formed on the cutting edge.