JPH02117813U

JPH02117813U -

Info

Publication number: JPH02117813U
Application number: JP2799689U
Authority: JP
Priority date: 1989-03-10
Filing date: 1989-03-10
Publication date: 1990-09-20
Anticipated expiration: 2004-03-10
Also published as: JPH0727049Y2

Description

[Brief explanation of the drawing]

第１図〜第７図は本考案のボールエンドミルの
一実施例を示すもので、第１図はチツプの取付状
態を示す斜視図、第２図はチツプ取付部の側断面
図、第３図〜第６図はチツプの形状を示すもので
、第３図は正面図、第４図は第３図の−線視
図、第５図は第３図の−線視図、第６図は第
３図の−線視図、第７図イ，ロはチツプが荷
重を受けたときの挙動を説明するための図である
。第８図イ，ロは、凸部および凹部が円形とされ
た比較例のチツプが荷重を受けたときの挙動を説
明するための図である。第９図は本考案の他の実
施例のボールエンドミルを示すもので、このうち
イはエンドミル本体の先端部を示す側面図、ロは
チツプの平面図である。第１０図は本考案のさら
に他の実施例のボールエンドミルのチツプ取付部
の側断面図である。第１１図〜第１６図は従来の
ボールエンドミルを示すもので、第１１図は一側
面図、第１２図はその先端部の他の側面図、第１
３図は正面図、第１４図〜第１６図はチツプの形
状を示すもので、第１４図は正面図、第１５図は
側面図、第１６図は取付用孔部の形状を示す断面
図である。１……エンドミル本体、２……チツプポケツト
、３……チツプポケツト取付座、４……スローア
ウエイチツプ、６……すくい面（上面）、７……
着座面（下面）、８……切刃、１３……側面、１
４……取付底面、１５……取付側面、２０……凹
部、２０ａ……平坦面、２１……凸部、２１ａ…
…平坦面、Ｆ……荷重、Ｒ……チツプの移動方向
。 Figures 1 to 7 show an embodiment of the ball end mill of the present invention, in which Figure 1 is a perspective view showing how the tip is attached, Figure 2 is a side sectional view of the tip attachment part, and Figure 3 is a side sectional view of the tip attachment part. ~ Figures 6 show the shape of the chip; Figure 3 is a front view, Figure 4 is a - line view of Figure 3, Figure 5 is a - line view of Figure 3, and Figure 6 is a - line view of Figure 3. The - line view in Figure 3 and Figures 7A and 7B are diagrams for explaining the behavior of the chip when it is subjected to a load. FIGS. 8A and 8B are diagrams for explaining the behavior of a chip of a comparative example in which the convex portion and the concave portion are circular when subjected to a load. FIG. 9 shows a ball end mill according to another embodiment of the present invention, in which A is a side view showing the tip of the end mill body, and B is a plan view of the tip. FIG. 10 is a side sectional view of a tip attachment part of a ball end mill according to still another embodiment of the present invention. Figures 11 to 16 show a conventional ball end mill, with Figure 11 being one side view, Figure 12 being another side view of the tip, and Figure 12 being a side view of the tip.
Figure 3 is a front view, Figures 14 to 16 show the shape of the chip, Figure 14 is a front view, Figure 15 is a side view, and Figure 16 is a sectional view showing the shape of the mounting hole. It is. 1...End mill body, 2...Tip pocket, 3...Tip pocket mounting seat, 4...Throwaway tip, 6...Rake surface (top surface), 7...
Seating surface (lower surface), 8...Cutting blade, 13...Side surface, 1
4...Mounting bottom surface, 15...Mounting side surface, 20...Concave portion, 20a...Flat surface, 21...Protrusion portion, 21a...
...Flat surface, F...load, R...chip movement direction.

Claims

[Claims for Utility Model Registration] (1) A throw-away tip in which at least two arc-shaped cutting edges are formed on the ridgeline of the upper surface, which becomes the rake surface, on the tip mounting seat formed on the outer periphery of the tip of the end mill body. However, the first arc-shaped cutting blade is positioned from the outer peripheral side to the tip side of the end mill main body, and the lower surface serving as the seating surface and the side surface along the other arc-shaped cutting blade are respectively positioned as the mounting bottom surface of the tip mounting seat. and a ball end mill that is mounted in contact with a mounting side surface, wherein a convex portion is provided on either the seating surface of the throw-away tip or the mounting bottom surface of the tip mounting seat, and the other is engaged with the convex portion. A ball end mill characterized in that a recess is provided, and flat surfaces that can come into close contact with each other are formed on the walls of both the projection and the recess. (2) The flat surface is formed to be substantially perpendicular to the direction in which the throw-away chip mounted on the chip mounting seat moves when subjected to a load. A ball end mill according to claim 1 of patent registration.