JPH0187805U

JPH0187805U -

Info

Publication number: JPH0187805U
Application number: JP18399687U
Authority: JP
Priority date: 1987-12-01
Filing date: 1987-12-01
Publication date: 1989-06-09
Anticipated expiration: 2002-12-01
Also published as: JPH0529764Y2

Description

[Brief explanation of the drawing]

第１図は、この考案の工具を使用状態にして示
す斜視図、第２図は、その要部の拡大平面図、第
３図は第２図の―線に沿つた断面図、第４図
は実施例１の効果を示すグラフ、第５図は実施例
２に使用した被削材の側面図、第６図は従来工具
での刃先接触域を示す平面線図、第７図は従来工
具による断続切削形態の一例を示す線図である。１……切刃、２……すくい面、３……横逃げ面
、４……ネガテイブランド、Ｒ……ノーズ半径、
β……刃物角、φ……切刃傾き角、θ……横すく
い角、α…ネガテイブランド角、Ａ，Ａ′……被
削材、Ｆ……加工端面。 Fig. 1 is a perspective view showing the tool of this invention in use, Fig. 2 is an enlarged plan view of its main parts, Fig. 3 is a sectional view taken along the line - - in Fig. 2, and Fig. 4. is a graph showing the effect of Example 1, FIG. 5 is a side view of the workpiece used in Example 2, FIG. 6 is a plan view showing the contact area of the cutting edge with the conventional tool, and FIG. 7 is the conventional tool. It is a diagram showing an example of an interrupted cutting mode by. 1... Cutting edge, 2... Rake face, 3... Side flank surface, 4... Negative brand, R... Nose radius,
β...Blade angle, φ...Cutting blade inclination angle, θ...Side rake angle, α...Negative land angle, A, A'...Work material, F...Machine end face.

Claims

[Scope of Claim for Utility Model Registration] (1) A cutting tool whose cutting edge is made of a high-hardness sintered body containing cubic boron nitride, the cutting tool having a cutting edge angle β of 9
0° or more, and the nose portion of the cutting blade has a roundness with a radius R, and the cutting blade inclination angle φ and side rake angle θ are φ+θ≦1°, -12°<φ<-3 °
, θ≧4°, and the ratio d/R between the R and the depth of cut d during cutting is 0.375 or less. (2) The high-hardness sintered body contains cubic boron nitride in a volume ratio of 55 to 75%, and the remainder is carbides and nitrides of group a, a, and a transition metals of the periodic table,
The high-hardness sintered product according to claim 1 of the utility model registration claim, characterized in that it contains boride, silicide, oxide, or a mixture or mutual solid solution thereof, and aluminum, tungsten carbide, or unavoidable impurities. A tool for interrupted cutting using the body. (3) -10° to -35° to the nose R part of the cutting blade above.
An interrupted cutting tool using a high hardness sintered body according to claim 1 or 2 of the utility model registration claim, characterized in that it has a negative brand of .