JPS5836017U

JPS5836017U - drilling tool

Info

Publication number: JPS5836017U
Application number: JP13137581U
Authority: JP
Inventors: 国森　永年
Original assignee: 住友電気工業株式会社
Priority date: 1981-08-31
Filing date: 1981-08-31
Publication date: 1983-03-09

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、本考案の孔明は工具を示す側面図、第２図は
同上の正面図、第３図は第１図に示す工具を９０°回転
して見た側面図、第４図は斜視図、第５図はチップの他
の実施例を示す正面図である。１・・・工具本体、２・・・ねじれ溝、３・・・座面、
４・・・チップ、５・・・切刃、７・・・すくい面、８
・・・平取部、９・・・にげ面、１０．１０’・・・凹
所、１１・・・凸部。Figure 1 is a side view showing the tool of the present invention, Figure 2 is a front view of the same as above, Figure 3 is a side view of the tool shown in Figure 1 rotated by 90 degrees, and Figure 4 is a side view of the tool shown in Figure 1. The perspective view and FIG. 5 are front views showing another embodiment of the chip. 1... Tool body, 2... Twisted groove, 3... Seat surface,
4... Chip, 5... Cutting edge, 7... Rake face, 8
...Flat portion, 9...Ripped surface, 10.10'...Concave portion, 11...Convex portion.

Claims

[Scope of utility model registration request]

(1) At the tip of the tool body, a pair of tips are arranged point-symmetrically with each other with the starting end of each cutting edge located near the center of rotation,
Each of the above-mentioned inserts has several steps of flattened parts in the axial direction that are convex in the direction of rotation on the rake face near the center of rotation, with the intersection line with the front curved surface serving as the center edge. An axial recess is provided in the center to form a central cutting edge that connects the center edge and the outer cutting edge, and the outer cutting edge has a positive radial rake angle and an axial rake angle. Komei is a tool that is characterized by forming a positive angle close to the helix angle of the helix groove of the tool body.

(2) The tool according to claim 1, wherein the axial helix angle of each tip is set to be approximately equal to the helix angle of the helix groove of the tool body.

(3) The tool according to claim 1 or 2, wherein the tip has a convex portion that serves as a chip breaker at the rear of the rake face.

(4) The tip is removably attached to the tool body as a two-corner type or a single-corner type that is symmetrical in the front and back. The Komei mentioned in any of these is a tool.