JPH03107122U

JPH03107122U -

Info

Publication number: JPH03107122U
Application number: JP1592990U
Authority: JP
Priority date: 1990-02-20
Filing date: 1990-02-20
Publication date: 1991-11-05

Description

[Brief explanation of drawings]

第１図は本考案のスローアウエイ式ボールエン
ドミルの一実施例を示したもので、第１図ａはそ
の正面図、第１図ｂは同図ａの底面図、第２図は
上記ボールエンドミルの中心部分に装着されるチ
ツプの図で、第２図ａはその正面図、第２図ｂは
同図ａの底面図、第２図ｃは同図ａの側面図、第
３図は上記ボールエンドミルの外周側に装着され
るチツプの図で、第３図ａはその正面図、第３図
ｂは同図ａの底面図、第３図ｃは同図ａの側面図
である。１……中心部分切削用チツプ、２……外周側切
削用チツプ、１０……シヤンク本体、１２ａ，１
２ｂ……切刃、１３ａ，１３ｂ……すくい面、１
６ａ，１６ｂ……逃げ面、２１ａ，２１ｂ……す
くい面、２２ａ，２２ｂ……逃げ面、２３ａ，２
３ｂ……切刃、１０１……半球状部、１０３，１
０３ａ，１０３ｂ……チツプ座。 Fig. 1 shows an embodiment of the throw-away ball end mill of the present invention, Fig. 1a is its front view, Fig. 1b is a bottom view of Fig. 1a, and Fig. 2 is the ball end mill described above. Figure 2a is a front view of the chip, Figure 2b is a bottom view of Figure a, Figure 2c is a side view of Figure A, and Figure 3 is the same view as above. 3A is a front view thereof, FIG. 3B is a bottom view of FIG. 3A, and FIG. 3C is a side view of FIG. 3A. 1... Tip for cutting the center portion, 2... Tip for cutting the outer peripheral side, 10... Shank body, 12a, 1
2b... Cutting blade, 13a, 13b... Rake face, 1
6a, 16b... Relief surface, 21a, 21b... Rake surface, 22a, 22b... Relief surface, 23a, 2
3b...Cutting blade, 101...Semispherical part, 103,1
03a, 103b...Chipu constellation.

Claims

[Scope of utility model registration request]

At the tip of the shank body, there is a chip for cutting a portion of the work material that corresponds to the center of rotation of the shank body, and one or more chips for cutting a portion of the work material that corresponds to the outer circumferential side of the shank body. and,
The cutting edges are arranged so that they partially overlap each other on the rotation trajectory, and the rotational projection of the end portion is hemispherical, and at least the rake face of the chip located in the hemispherical portion is a slope that slopes downward toward the center of the chip. A throw-away ball end mill characterized by providing a positive rake angle.