JPS6084204U

JPS6084204U - Drill

Info

Publication number: JPS6084204U
Application number: JP17778383U
Authority: JP
Inventors: 浜田　知伸
Original assignee: ダイジヱツト工業株式会社
Priority date: 1983-11-16
Filing date: 1983-11-16
Publication date: 1985-06-11

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図は本考案のドリルの要部を示した正面図、第２図
は第１図を拡大した底面図、第３図はこの考案の作用を
説明するために用いた作用図などである。１・・・シャンク本体、２，２１・・・チップ、１１゜
１１□・・・フルート、１２．１２□・・・チップ座、
１３．１３□・・・ポケット、１４，１４１・・・壁、
１５．１５□・・・油穴、２１．２１□・・・切刃稜線
、２２．２２．・・・切刃始端、２３．２３□・・・外
周切刃、０・・・軸中心。Figure 1 is a front view showing the main parts of the drill of this invention, Figure 2 is an enlarged bottom view of Figure 1, and Figure 3 is an action diagram used to explain the operation of this invention. . 1...Shank body, 2,21...Tip, 11゜11□...Flute, 12.12□...Tip seat,
13.13□...pocket, 14,141...wall,
15.15□... Oil hole, 21.21□... Cutting edge ridge line, 22.22. ...Start of cutting edge, 23.23□...Outer cutting edge, 0...Axis center.

Claims

[Scope of utility model registration request]

It has a pair of cutting edges, one cutting edge starting end is located near the drill rotation center, the other cutting edge starting end is located away from the drill rotation center, and at least the cutting edge located near the drill rotation center, 1. A drill characterized in that, in a bottom view, the cutting edge has a protruding curve and a cutting edge has a straight line or a curved edge with a smaller curvature than the cutting edge.