JPS6017912U

JPS6017912U - carbide drill

Info

Publication number: JPS6017912U
Application number: JP10935383U
Authority: JP
Inventors: 良克森
Original assignee: 住友電気工業株式会社
Priority date: 1983-07-12
Filing date: 1983-07-12
Publication date: 1985-02-06

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、本考案ドリルの一例を示す側面図、第２図は
その正面図、第３図及び第４図はマージン刃部分の拡大
正面図、第５図及び第６図は外周逃げ面と切屑排出溝と
の交線部の拡大正面図である。１・・・・・・本体、２・・・・・・外周マージン面、
３・・・・・・切屑排出溝面、４・・・・・・交線部、
５・・・・・・曲面、６・・・・・・面取部、７・・・
・・・外周逃げ面、８・・・・・・交線部、９・・・・
・・曲面、１０・・・・・・面取部。 ′　・　ｒｌ・　、′＋″″″″′ ２′　＼７Fig. 1 is a side view showing an example of the drill of the present invention, Fig. 2 is a front view thereof, Figs. 3 and 4 are enlarged front views of the margin blade portion, and Figs. 5 and 6 are peripheral flank surfaces. It is an enlarged front view of the intersection line of and a chip discharge groove. 1... Main body, 2... Outer margin surface,
3...Chip discharge groove surface, 4...Intersection line part,
5... Curved surface, 6... Chamfered part, 7...
...Outer circumferential flank surface, 8...Intersection line, 9...
...Curved surface, 10... Chamfered part. ′ ・ rl ・ , ′+″″″″′ 2′ \7

Claims

[Scope of utility model registration request]

(1) Part or all of the cutting edge is made of cemented carbide or TiC. In a drill made of cemented carbide having a surface coating layer such as T1CN, TiN, AI□03, etc., a drill with a radius of 0.03 to 0.15 mm is provided at least at the intersection of the outer peripheral margin surface of the main body and the chip discharge groove surface. A carbide drill characterized by being rounded or having a flat chamfered portion having the same width S and intersecting an outer peripheral margin surface at an obtuse angle when viewed from the front of the drill.

(2) In addition to etching the outer peripheral margin, the intersection of the outer peripheral flank and the chip discharge groove surface is also etched with a radius of 0°05 to 0.05°.
5B, or a flat chamfered portion that intersects both surfaces at an obtuse angle.