JPH0239814U

JPH0239814U -

Info

Publication number: JPH0239814U
Application number: JP11576788U
Authority: JP
Priority date: 1988-09-02
Filing date: 1988-09-02
Publication date: 1990-03-16

Description

[Brief explanation of drawings]

第１図は本考案の側面図、第２図は第１図のＡ
―Ａ′線矢視断面図、第３図は第２図の刃先拡大
図、第４図は従来品の４枚刃エンドミルの断面図
。１……工具本体、２……外周切れ刃、２′……
隣接する外周切れ刃、３……外周すくい面、４…
…外周二番面、５……外周三番面、６……外周切
れ刃の肩、６′……凸曲面状の輪郭、７……丸底
の丸み、８……フラツト切欠き部。 Figure 1 is a side view of the present invention, Figure 2 is A of Figure 1.
-A sectional view taken along the line A', Figure 3 is an enlarged view of the cutting edge of Figure 2, and Figure 4 is a sectional view of a conventional four-flute end mill. 1... Tool body, 2... Outer cutting edge, 2'...
Adjacent peripheral cutting edge, 3...Outer peripheral rake face, 4...
...Second surface on the outer periphery, 5...Third surface on the outer periphery, 6...Shoulder of the cutting edge on the outer periphery, 6'...Convex curved contour, 7...Roundness of the round bottom, 8...Flat notch.

補正昭６３．１１．７実用新案登録請求の範囲を次のように補正する
。Amendment November 7, 1983 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】 (1) 工具本体の外周に、４５°〜６０°にねじ
れた３枚刃以上の切れ刃を有する強ねじれエンド
ミルにおいて、刃部の形状を軸に対して直角断面
で表わしたとき、切れ刃から軸心方向に向う刃溝
の深さが刃径の１／５〜１／２５であつて、すく
い角が−５°〜＋２０°の範囲にあるレーキ状の
すくい面をもつ切れ刃と、刃溝の深さのほぼ（１
／２〜５）倍の丸みをもつ刃底と、この一端から
隣接する切れ刃の三番面までをほぼ直線に結んだ
刃形輪郭を有することを特徴とする強ねじれエン
ドミル。 (2) 工具本体のシヤンク部は緊定用の切欠き部
を設けてなる実用新案登録請求の範囲第１項記載
の強ねじれエンドミル。[Claims for Utility Model Registration] (1) In a strongly twisted end mill that has three or more cutting edges twisted at 45° to 60° on the outer periphery of the tool body, the shape of the blade section is perpendicular to the axis.
A rake-shaped rake in which the depth of the blade groove from the cutting edge in the axial direction is 1/5 to 1/25 of the blade diameter, and the rake angle is in the range of -5° to +20°. The cutting edge has a surface and the depth of the blade groove is approximately (1
/2 to 5) A strong helix end mill characterized by having a blade bottom with double roundness and a blade profile that connects one end of the bottom to the third surface of an adjacent cutting edge in a substantially straight line. (2) The strong helix end mill according to claim 1, wherein the shank portion of the tool body is provided with a notch portion for tightening.

Claims

[Scope of Claim for Utility Model Registration] (1) In a strongly twisted end mill that has three or more cutting edges twisted at 45° to 60° on the outer periphery of the tool body, when the shape of the blade is expressed in an axial cross section. , the depth of the blade groove from the cutting edge in the axial direction is 1/5 to 1/25 of the blade diameter, and the rake angle is -5°
A cutting edge with a rake-like rake face in the range of ~ +20°, a cutting edge with a roundness approximately (1/2 to 5) times the depth of the cutting groove, and three adjacent cutting edges from one end. A strong helix end mill characterized by having a blade profile that is connected almost in a straight line up to the cutting face. (2) The strong helix end mill according to claim 1, wherein the shank portion of the tool body is provided with a notch portion for tightening.