JPS63131313U

JPS63131313U -

Info

Publication number: JPS63131313U
Application number: JP2252687U
Authority: JP
Priority date: 1987-02-17
Filing date: 1987-02-17
Publication date: 1988-08-26

Description

[Brief explanation of the drawing]

第１図は、この考案の実施例を示す斜視図、第
２図は同じく平面図、第３図は同じく部分側面図
、第４図Ａは、同じく部分側断面説明図、Ｂは、
在来エンドミルの部分側断面説明図、第５図は、
第６図Ａ，Ｂを説明するためのエンドミルの平面
図、第６図Ａは、在来エンドミルの切削面積を示
す図、Ｂは、この考案の実施例による方法で切削
した、底刃の長刃と短刃の切削面積を示す図であ
る。１……底刃、２……軸中心、３……長刃、３ａ
……長刃の切れ刃、４……短刃、４ａ……短刃の
切れ刃、８……長刃のすかし角、９……短刃のす
かし角。 FIG. 1 is a perspective view showing an embodiment of the invention, FIG. 2 is a plan view, FIG. 3 is a partial side view, FIG. 4A is a partial side cross-sectional view, and B is a
Fig. 5 is a partial side cross-sectional explanatory diagram of a conventional end mill.
FIG. 6A is a plan view of the end mill for explaining FIGS. 6A and B. FIG. 6A is a diagram showing the cutting area of a conventional end mill. It is a figure which shows the cutting area of a blade and a short blade. 1...Bottom blade, 2...Shaft center, 3...Long blade, 3a
...Long blade cutting edge, 4...Short blade, 4a...Short blade cutting edge, 8...Long blade diagonal angle, 9...Short blade diagonal angle.

Claims

[Scope of utility model registration request]

The bottom blade, which consists of a long blade and a short blade, is arranged axially symmetrically on the tip surface, and both bottom blades on 180 degrees opposite sides are
In a center-cut end mill in which two or more pairs of bottom blades are formed when paired, the long blade 3 has a bevel angle 8 smaller than the short blade angle 9 of the short blade 4, and the long blade The axial position from the axis center 2 to the position closest to the axis center of the short blade is radius 11, and the cutting edge 3a of the long blade 3 and the cutting edge 4a of the short blade 4 are placed at the same rotation radius position 10. A center cut end mill characterized in that the bevel angles of the long blade and the short blade are provided toward the position 10 where the heights of the long blade and the short blade practically coincide with each other.