JPH01101704U

JPH01101704U -

Info

Publication number: JPH01101704U
Application number: JP20159487U
Authority: JP
Priority date: 1987-12-25
Filing date: 1987-12-25
Publication date: 1989-07-10
Anticipated expiration: 2002-12-25
Also published as: JP2558412Y2

Description

[Brief explanation of the drawing]

第１図ａ、第１図ｂおよび第２図ａ、第２図ｂ
は従来のろう付等により固着されたスローアウエ
イチツプでありａは正面図、ｂは側面図をそれぞ
れ示す。第３図ａ、第３図ｂは硬質焼結体単体か
ら成るスローアウエイチツプでありａは正面図、
ｂは側面図を示す。第４図ａ、第４図ｂは本考案
の実施例を示すスローアウエイチツプでありａは
正面図、ｂは側面図を示す。第５図は第４図ａの
Ａ―Ａ断面図であり、第６図は第４図ａのＢ―Ｂ
断面図であり、第７図は第４図ａのＣ―Ｃ断面図
である。 Figure 1a, Figure 1b and Figure 2a, Figure 2b
1 is a throwaway chip fixed by conventional brazing or the like; a shows a front view, and b shows a side view. Figures 3a and 3b are throw-away chips made of a single hard sintered body; a is a front view;
b shows a side view. FIGS. 4a and 4b show a throw-away chip showing an embodiment of the present invention, where a shows a front view and b shows a side view. Fig. 5 is a sectional view taken along line AA in Fig. 4a, and Fig. 6 is a sectional view taken along line B-B in Fig. 4a.
FIG. 7 is a sectional view taken along line CC in FIG. 4a.

Claims

[Claims for Utility Model Registration] (1) Two or three layers having a hard sintered body layer or a hard sintered body layer bonded directly or through an intermediate layer to the upper surface of a sintered carbide layer. The throw-away chip is made of a single composite hard sintered body, and has a shape such as a triangle, square, or rhombus, with the upper surface of the layer of the hard sintered body being the rake face and the thickness direction of the hard sintered body being the flank face. A throw-away tip characterized in that the angle formed between the rake face and each flank face of the tip is 90° at each side and less than 90° near the R portion of the cutting edge. (2) In the throw-away chip described in claim 1 of the utility model registration claim, the condition of the flank face of each side where the angle between the rake face and the flank face is 90° is machined by electric discharge machining or wire electric discharge machining. A throw-away chip characterized in that the surface is in the same state as it was ground, and the flank surface near the R part of the cutting edge where the angle between the rake face and the flank face is less than 90° is a ground surface. . (3) In the indexable tip described in claims 1 and 2 of the utility model registration, the position where the angle between the rake face and the flank face is less than 90° is only around the entire circumference of the R part of the cutting edge, or A throw-away tip characterized by being within a range of 3 mm or less in the straight line direction of the side from the entire circumference of the R part of the cutting edge and the point where the R part of the cutting edge touches the straight line of the side. (4) The throw-away chip according to any of claims 1 to 3, wherein the hard sintered body is a diamond sintered body containing diamond as a main component. (5) Utility model registration claims 1 to 3, characterized in that the hard sintered body is a high-pressure phase type boron nitride sintered body containing high-pressure phase type boron nitride as a main component.
Throwaway tip as described in section.