JPH0164309U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ないし第４図は本考案の一実施例を示す
図であつて、第１図はスローアウエイチツプを示
す平面図、第２図は凹溝の詳細を示す平面図、第
３図は第２図の―線視断面図、第４図は第２
図の―線視断面図、第５図ないし第９図は従
来のスローアウエイチツプを示す図であつて、第
５図ないし第８図はそれぞれスローアウエイチツ
プの要部を示す平面図、第９図は第８図の方向
矢視図である。 ２……切刃、３……ランド、４……凹溝、４ａ
……壁面、５……凹溝、５ａ……壁面、６……切
刃、１１……上面（端面）、１２……角部、１３
……切刃、１４……ランド、１５……凹溝、１５
ｂ……第２凹曲面、１５ｃ……第１凹曲面、Ａ，
Ｂ，Ｃ，Ｄ，Ｅ……スローアウエイチツプ、Ｗ…
…谷線。 1 to 4 are views showing one embodiment of the present invention, in which FIG. 1 is a plan view showing the throw-away tip, FIG. 2 is a plan view showing details of the groove, and FIG. 3 is a plan view showing the details of the groove. Figure 2 is a sectional view taken along the line, Figure 4 is a cross-sectional view of the
5 to 9 are diagrams showing conventional throw-away chips, and FIGS. 5 to 8 are plan views showing the main parts of the throw-away chip, and FIGS. The figure is a directional view of FIG. 8. 2...Cutting blade, 3...Land, 4...Concave groove, 4a
... Wall surface, 5 ... Concave groove, 5a ... Wall surface, 6 ... Cutting edge, 11 ... Top surface (end surface), 12 ... Corner, 13
... Cutting edge, 14 ... Land, 15 ... Concave groove, 15
b...Second concave curved surface, 15c...First concave curved surface, A,
B, C, D, E... Throwaway tip, W...
... Valley line.

Claims (1)

【実用新案登録請求の範囲】 外観略多角形板状をなし、少なくとも一端面の
角部で交叉する２つの稜線部のうち一方に切刃が
形成され、この切刃に沿う所定幅の部分に高さが
一様とされたランドが形成され、このランドに沿
つて凹溝が形成されてなるスローアウエイチツプ
において、上記凹溝を、その横断面における最深
部が連続してなる谷線が切刃に沿う方向へ向かつ
て上記切刃に対して内側へ平面視角度α傾斜し、
かつ、谷線が端面に対して切刃に沿う方向へ向か
つて下り勾配となる角度β傾斜するように形成し
、凹溝の谷線の端部から端面側へ立ち上がる壁面
を谷線を含み端面と直交する断面形状が曲率半径
Ｒ_１の略円弧状となる凹曲面に形成するとともに
、谷線から端面側へ立ち上がる壁面を谷線に直交
する断面形状が曲率半径Ｒ_２の略円弧状となる凹
曲面に形成し、上記角度α，β、曲率半径Ｒ_１，
Ｒ_２と、上記谷線と直交する断面における上記ラ
ンドと凹溝の壁面とのなす角度γおよび上記ラン
ドの幅Ｗとを次の範囲内で設定したことを特徴と
するスローアウエイチツプ。 ３°≦α≦７°，１°≦β≦５° １５°≦γ≦２５° ２０mm≦Ｒ_１≦３０mm ２mm≦Ｒ_２≦４mm ０．０５mm≦Ｗ≦０．２mm[Claims for Utility Model Registration] Approximately polygonal plate-like in appearance, a cutting edge is formed on one of two ridgeline portions that intersect at the corner of at least one end surface, and a predetermined width portion along the cutting edge. In a throwaway chip in which a land with a uniform height is formed and a groove is formed along the land, the groove is cut by a continuous valley line at the deepest point in the cross section. In the direction along the blade, the angle α in plan view is inclined inward with respect to the cutting blade,
In addition, the valley line is formed so as to be inclined at an angle β that is downward in the direction along the cutting edge with respect to the end face, and the wall surface that rises from the end of the valley line of the concave groove toward the end face including the valley line is formed on the end face. The cross-sectional shape perpendicular to the valley line is formed into a concave curved surface having a substantially circular arc shape with a radius of curvature _R1 , and the cross-sectional shape of the wall surface rising from the valley line toward the end surface perpendicular to the valley line has a substantially circular arc shape with a radius of curvature _R2 . It is formed into a concave curved surface, and the angles α and β, the radius of curvature R ₁ ,
A throw-away chip characterized in that _R2 , the angle γ between the land and the wall surface of the groove in a cross section perpendicular to the valley line, and the width W of the land are set within the following ranges. 3°≦α≦7°, 1°≦β≦5° 15°≦γ≦25° 20mm≦R ₁ ≦30mm 2mm≦R ₂ ≦4mm 0.05mm≦W≦0.2mm