JPH01101714U

JPH01101714U -

Info

Publication number: JPH01101714U
Application number: JP19905087U
Authority: JP
Priority date: 1987-12-25
Filing date: 1987-12-25
Publication date: 1989-07-10

Description

[Brief explanation of the drawing]

第１図のａ，ｂは、この考案の一実施例の側面
図と正面図、第２図のａ，ｂ、ｃは他の実施例の
側面図、正面図、背面図である。また、第３図は
従来のソリツドタイプボールエンドミルの一例を
示す側面図である。１……シヤンク、２……切刃、３……後端面、
４……エアー孔、５……切屑ポケツト面、イ……
断面２次モーメントの比較部。 1A and 1B are a side view and a front view of one embodiment of this invention, and FIGS. 2A, 2B and 2C are a side view, a front view, and a rear view of another embodiment. Moreover, FIG. 3 is a side view showing an example of a conventional solid type ball end mill. 1... Shank, 2... Cutting edge, 3... Rear end surface,
4... Air hole, 5... Chip pocket surface, A...
Comparison section of second moment of area.

Claims

[Claims for Utility Model Registration] (1) A solid-type ball end mill made of a carbide material, in which the cutting edge exists only in the spherical tip or in the area slightly set back from the spherical portion; The ball end mill is characterized in that there are a plurality of ball end mills, and the cross section of each part except the cutting edge forming part is circular. (2) Registration of a utility model characterized by having an air hole that passes from the rear end to the tip on a circle of approximately 1/2 to 2/3D (D: end mill diameter) concentric with the center of rotation. A ball end mill according to claim 1. (3) The above cemented carbide material is WC-Co based or WC-
The ball end mill according to claim 1 or 2, which is a TaC-TiC-Co based cemented carbide. (4) The above superhard material is TiC, TiN, TaC
, NbC, or the like as a main component.