JPH02114418U

JPH02114418U -

Info

Publication number: JPH02114418U
Application number: JP2167589U
Authority: JP
Priority date: 1989-02-27
Filing date: 1989-02-27
Publication date: 1990-09-13
Anticipated expiration: 2004-02-27
Also published as: JPH084963Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係わるスローアウエイ式ボー
ルエンドミルの正面図、第２図はその側面図、第
３図はその底面図、第４図は主チツプの正面図、
第５図ａはその側面図で第５図ｂは他の実施例の
場合のその側面図であり、第６図は副チツプの正
面図、第７図はその側面図、第８図は主チツプの
チツプ座を示す図で、ａは正面図、ｂはその右斜
下方からの側面図、第９図は本考案の応用例を示
す補助チツプ付きスローアウエイ式ボールエンド
ミルの正面図、第１０図はその側面図、第１１図
は副チツプの変形例を示す正面図、第１２図は副
チツプとして第１１図チツプをセツトした時のス
ローアウエイ式ボールエンドミルの正面図、第１
３図は主チツプにおける外周側よりの曲面状面取
りを示す正面図、第１４図は主チツプにおけるす
くい面側よりの直線状面取りを示す図で、ａはそ
の一部省略正面図、ｂはその右斜下方からの側面
図、第１５図ａ，ｂ，ｃは、主チツプ底面の直線
状凹部又は凸部の変形例を示す側面図である。１……工具本体、２……主チツプ、３……副チ
ツプ、３′……副チツプ３の変形例、４……軸中
心線、５……チツプ座、１０……補助チツプ、２
１ａ，２１ｂ，３１ａ，３１ｂ……円弧傾斜側面
、２２ａ，２２ｂ，３２ａ，３２ｂ……直線状傾
斜側面、２３ａ，２３ｂ……交線、２４……上面
、２５……切刃部、２６……チツプ底面、２７…
…直線状凹部、３９ａ，３９ｂ……短辺側面、５
１……側壁、５２……チツプ座底面、５３……チ
ツプ座底面凸部。 Fig. 1 is a front view of the indexable ball end mill according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a bottom view thereof, Fig. 4 is a front view of the main tip,
Fig. 5a is a side view of the chip, Fig. 5b is a side view of another embodiment, Fig. 6 is a front view of the subchip, Fig. 7 is a side view thereof, and Fig. 8 is a main chip. 9 is a front view of a throw-away ball end mill with an auxiliary tip showing an application example of the present invention; FIG. The figure is a side view, Figure 11 is a front view showing a modification of the auxiliary tip, Figure 12 is a front view of the indexable ball end mill when the tip in Figure 11 is set as the auxiliary tip,
Figure 3 is a front view showing the curved chamfering from the outer peripheral side of the main chip, and Figure 14 is a diagram showing the linear chamfering from the rake face side of the main chip. FIGS. 15a, 15b, and 15c, which are side views viewed diagonally from the lower right side, are side views showing modified examples of linear recesses or protrusions on the bottom surface of the main chip. DESCRIPTION OF SYMBOLS 1... Tool body, 2... Main chip, 3... Sub-chip, 3'... Modification of sub-chip 3, 4... Axis center line, 5... Chip seat, 10... Auxiliary chip, 2
1a, 21b, 31a, 31b...Circular inclined side surface, 22a, 22b, 32a, 32b...Linear inclined side surface, 23a, 23b...Intersection line, 24...Top surface, 25...Cutting edge portion, 26... Bottom of chip, 27...
...Linear recess, 39a, 39b...Short side, 5
1... Side wall, 52... Chip seat bottom surface, 53... Chip seat bottom surface convex portion.

Claims

[Claims for Utility Model Registration] (1) A positive type throw-away tip with a clearance angle is mechanically and removably attached to the tip seat in the tip pocket provided in the tip ball portion of the tool body, and the circular arc of the tip is In a throw-away ball end mill in which the rotation locus of the cutting blade is hemispherical, the throw-away tip has a main chip that has a cutting blade up to the center of the shaft, and a main chip that has a cutting blade that extends to the center of the shaft, and a cutting blade that extends to the center of the shaft. and an auxiliary tip having a shape, and when the ball end mill is viewed from the bottom, the arcuate cutting edge portions of the main tip and the auxiliary tip have substantially the same shape, and both have a substantially S-shape. Throw-away ball end mill. (2) In the throw-away ball end mill according to claim 1, at least the main tip of the throw-away tips has an approximately 1/4-circular arcuate inclined side surface and a linear inclined side surface connected thereto, which are attached to the center of the tip. The cutting edge is symmetrical with respect to the hole, and has a cutting edge at the line of intersection with the upper surface that becomes the rake surface, and further has a linear inclined side surface on the side of the intersection line where the arcuate inclined side surface and the linear inclined side surface intersect, and The chip is fixed to the chip seat so that the side face or one side face of a linear protrusion or recess provided on the bottom face that intersects the virtual extension line of the side face at an acute angle of 90 degrees or less on the intersection line side serves as the reference side face for chip attachment. A throw-away ball end mill characterized by being attached via screws.