JP2003071625A - End mill - Google Patents
End millInfo
- Publication number
- JP2003071625A JP2003071625A JP2001260710A JP2001260710A JP2003071625A JP 2003071625 A JP2003071625 A JP 2003071625A JP 2001260710 A JP2001260710 A JP 2001260710A JP 2001260710 A JP2001260710 A JP 2001260710A JP 2003071625 A JP2003071625 A JP 2003071625A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- outer peripheral
- tool
- radius
- flank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、工作機械で用いるボー
ルエンドミルやラジアスエンドミル等の工具先端部にア
ール刃を有するエンドミルに関するものであり、特に縦
壁に近い壁面を有する３次元曲面を含む金型や機械部品
等の仕上げ加工に用いるエンドミルに関するものであ
る。
【０００２】
【従来の技術】金型加工および部品加工の３次元曲面の
仕上げ加工には、一般にボ−ルエンドミルやラジアスエ
ンドミルが用いられている。３次元曲面形状を創成する
時はアール刃部分を用いて加工し、壁面加工時には外周
刃を主に用い加工する。従来、アール刃を確実に外周刃
と繋ぐために、アール刃のすくい面が外周刃部分まで伸
延しており、アール刃のすくい面加工時の砥石干渉によ
り、アール刃と外周刃の繋ぎ部の外周刃部分が削られ、
外周刃の定常部の刃径より小さくなり、又、砥石干渉を
避けようとすると、アール刃と外周刃の繋ぎ部のアール
刃部分が膨らみ、工具の形状精度が劣っていた。
【０００３】
【発明が解決しようとする課題】しかしながら、従来の
ボールエンドミルは、ボ−ルエンドミルやラジアスエン
ドミルは、アール刃のアール精度が主とされていたた
め、アール刃と外周刃が連接する部分の精度について
は、ほとんど着目されていなかった。そのため、アール
刃と外周刃が連接する部分は異常摩耗を発生しやすく、
又、縦壁に近い壁面の加工する場合、高精度な加工形状
が得難いという課題があった。
【０００４】
【発明の目的】本発明は、以上の課題を解決するために
なされたものであり、縦壁に近い壁面を有する３次元曲
面を含む金型や機械部品等の仕上げ加工において、高精
度に加工できるエンドミルを提供するものである。
【０００５】
【課題を解決するための手段】本発明は、上記の目的を
達成するために、工具先端部に略１／４円弧状のアール
刃と工具外周に外周刃とを有するエンドミルにおいて、
該アール刃のすくい面と該外周刃のすくい面との境界線
の一端と、該アール刃の逃げ面と該外周刃の逃げ面との
境界線の一端とが、切れ刃稜線上の点で略一致すること
を特徴とするエンドミルである。上記構成をとることに
より、ほとんど砥石干渉がなく、アール刃と外周刃の繋
ぎ部において、容易に正規の形状が得ることができた。
ここで略一致とは、該アール刃のすくい面と該外周刃の
すくい面との境界線の一端と、該アール刃の逃げ面と該
外周刃の逃げ面との境界線の一端との差が、工具軸方向
でアール刃半径に対して５％以下の範囲とした。
【０００６】
【実施の形態】アール刃の法線方向断面視におけるアー
ル刃すくい面の長さを、アール刃６０°部付近からアー
ル刃９０°部、即ちアール刃と外周刃の繋ぎ部に向かっ
て連続的に短くし、ほぼアール刃９０°部でアール刃す
くい面の長さを０にしても良く、更に、ほぼアール刃９
０°部で工具径方向のすくい角が５°以上極端に変化す
るすくい角の変化点としても良く、アール刃のすくい面
と外周刃のすくい面との境界線の一端と、アール刃の逃
げ面と外周刃の逃げ面との境界線の一端とが、切れ刃稜
線上の点で略一致することができる。
【０００７】又、該アール刃と該外周刃の繋ぎ部付近
で、該アール刃のねじれ角と該外周刃のねじれ角の角度
差が１０°未満にしても良く、僅かに砥石干渉が生じた
場合においても、アール刃と外周刃の繋ぎ部が滑らかに
なった分、砥石干渉による外周刃部分の削り量を最小限
に抑えることができる。このため、角度差は、出来る限
り小さい方が良く、１０°未満にしたのは、１０°以上
では、アール刃と外周刃の繋ぎ部の外周刃部分の刃径
が、外周刃の定常部の刃径より小さくなる傾向が大きく
なるからである。以下、実施例に基づき、本発明を具体
的に説明する。
【０００８】（実施例１）図１、図２は、本発明例１と
して、ラジアスエンドミルに適用した例のアール刃１の
すくい面側及び逃げ面側から見た拡大図である。工具先
端部からアール刃１のすくい面２と外周刃３のすくい面
４との境界線５の一端までの工具軸方向長さ６と、アー
ル刃１の逃げ面７と外周刃３の逃げ面８との境界線９の
一端までの工具軸方向長さ１０とをほぼ同じ長さとし、
切れ刃稜線上の点で略一致させたものである。又、図
３、図４は、従来例２として、アール刃１のすくい面側
及び逃げ面側から見た拡大図であり、アール刃１のすく
い面２が外周刃３部分まで伸延しており、アール刃１の
すくい面２と外周刃３のすくい面４との境界線５の一端
までの工具軸方向長さ６と、アール刃１の逃げ面７と外
周刃３の逃げ面８との境界線９の一端までの工具軸方向
長さ１０との差が、工具軸方向でアール刃半径に対して
１０％以上離れている。
【０００９】上記、本発明例１と従来例２、３とを、素
材に超微粒子超硬合金を使用し、工具径１２ｍｍ、コー
ナアール半径２ｍｍ、３枚刃、外周ねじれ角３０°で製
作し、ＴｉＡｌＮコーティングを施し、工具形状精度の
比較を行った。ここで、本発明例１については、アール
刃の法線方向断面視におけるアール刃すくい面の長さ
を、アール刃６０°部付近からアール刃９０°部、即ち
アール刃と外周刃の繋ぎ部に向かって連続的に短くし、
ほぼアール刃９０°部でアール刃すくい面の長さを０に
し、ほぼアール刃９０°部で工具径方向のすくい角が−
５°から＋５°に極端に変化するすくい角変化点とし
た。又、従来例２は、砥石干渉のあるもの、従来例４は
砥石干渉を避けたもので行った。その結果を図５〜図７
に示す。本発明例１は、ほぼ正規の形状と一致している
のに対し、従来例２は、アール刃と外周刃の繋ぎ部の外
周刃部分が凹状になっており、外周刃の定常部の刃径よ
り小さくなっていた。又、従来例３は、アール刃と外周
刃の繋ぎ部のアール刃部分が膨らみ、従来例２、３とも
に、アール刃と外周刃の繋ぎ部付近において、正規の形
状から外れ、工具の形状精度が得られていなかった。
【００１０】更に、本発明例１と従来例２、３を用いて
切削テストを行った。切削諸元は、被削材は、構造用炭
素鋼のＳ５５Ｃ材を用い、側面仕上げ加工を、回転数１
３００回転、送り速度２７０ｍｍ／ｍｉｎ、工具径方向
切り込み０．０５ｍｍ、工具軸方向切り込み１０ｍｍ、
水溶性切削液を用いた湿式、ダウンカットで行い、加工
精度と工具摩耗状態を観察した。その結果、本発明例１
は、良好な加工精度が得られ、工具摩耗状態も微小且つ
均一な通常摩耗であった。従来例２、３は、工具精度が
そのまま被削材に転写され、加工精度が劣り、アール刃
と外周刃の繋ぎ部付近で加工されたところに段差を生じ
た。又、工具摩耗状態もアール刃と外周刃の繋ぎ部付近
が突出した状態のために、この部位の摩耗が他の部位と
比較して大きくなっていた。
【００１１】（実施例２）次に、実施例１ラジアスエン
ドミルを使用して、被削材にＨＲＣ４０のプリハードン
鋼を用い、長さ１５０ｍｍ、幅１８ｍｍ、深さ３０ｍ
ｍ、側壁の片角３°の溝状のポケット嵌め合い部の加工
を、回転数２６００回転、送り速度７８０ｍｍ／ｍｉ
ｎ、工具軸方向ピッチ０．１ｍｍで、エアブローで等高
線加工を行い、加工精度と工具摩耗状態を観察した。そ
の結果、本発明例１は、良好な加工面、加工精度が得ら
れ、嵌め合い状態も良く、工具摩耗状態も微小且つ均一
な通常摩耗であった。従来例２は、アール刃と外周刃の
繋ぎ部の外周刃部分が凹状になっており、外周刃の定常
部の刃径より小さいことから、削り残しが生じ、嵌め合
いが悪く、加工精度が満足できない状態であり、工具摩
耗状態もアール刃と外周刃の繋ぎ部付近の摩耗が大きく
なっていた。従来品３は、アール刃と外周刃の繋ぎ部の
アール刃部分が膨らんでいることから、切削初期は削り
過ぎとなり、底部付近を加工する時には、すでにこの部
位の摩耗が極端に大きく、一部チッピングを生じていた
ため、削り残しとなり、加工精度が非常に悪かった。更
に、従来例２、３ともに、テーパ状の側壁面において、
工具送り方向に多数の筋が見られ、底部に近づくに従っ
て、ムシレた加工面になっていた。
【００１２】（実施例３）次に、本発明例１において、
該アール刃と該外周刃の繋ぎ部付近で、該アール刃のね
じれ角を本発明例４として１０°、本発明例５として１
５°、本発明例６として２０°、本発明例７として２２
°、本発明例８として２４°、を製作し、工具形状精度
の比較を行った。ここで、アール刃のすくい面と外周刃
のすくい面との境界線の一端と、アール刃の逃げ面と外
周刃の逃げ面との境界線の一端との差を、工具軸方向
で、許容最大値であるアール刃半径に対して５％、即ち
０．１ｍｍとした。その結果、本発明例４〜８では、ア
ール刃と外周刃の繋ぎ部の外周刃部分が凹状になってい
るものの、その凹み量は２μｍ未満であり、工具精度
上、全く問題にならないものであった。その中でも、角
度差が小さくなるほど、凹状の曲率及び凹み量が小さく
なる傾向があり、本発明例６で凹み量１μｍ未満、本発
明例７、８になると、凹状がほとんど判別つかない状態
であった。
【００１３】
【発明の効果】以上のように本発明を適用することによ
り、縦壁に近い壁面を有する３次元曲面を含む金型や機
械部品等の仕上げ加工において、高精度に加工できるエ
ンドミルを提供することができた。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end mill having a rounded edge at a tool tip such as a ball end mill or a radius end mill used for a machine tool, and particularly to a vertical wall. The present invention relates to an end mill used for finishing a die or a machine part including a three-dimensional curved surface having a close wall surface. 2. Description of the Related Art A ball end mill or a radius end mill is generally used for finishing a three-dimensional curved surface in mold processing and part processing. When creating a three-dimensional curved surface shape, processing is performed using a round blade portion, and when processing a wall surface, processing is mainly performed using an outer peripheral blade. Conventionally, the rake face of the round blade extends to the outer circumferential blade part in order to securely connect the round blade to the outer peripheral blade, and due to the grinding wheel interference during the rake face processing of the round blade, the connecting portion of the round blade and the outer peripheral blade is The outer edge is cut off,
If the diameter of the outer peripheral blade is smaller than the diameter of the stationary portion, and if an attempt is made to avoid whetstone interference, the radius blade portion of the connecting portion between the round blade and the peripheral blade swells, resulting in inferior tool shape accuracy. [0003] However, in the conventional ball end mill, the ball end mill and the radius end mill mainly have a radius accuracy of the radius blade, and therefore, a portion where the radius blade and the outer peripheral edge are connected to each other. Almost no attention has been paid to the accuracy of. For this reason, the part where the radius blade and the outer peripheral blade are connected is likely to cause abnormal wear,
Further, when processing a wall close to a vertical wall, there is a problem that it is difficult to obtain a highly accurate processed shape. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended for use in finishing a die or a machine part including a three-dimensional curved surface having a wall close to a vertical wall. It is intended to provide an end mill that can be machined with high accuracy. [0005] In order to achieve the above object, the present invention provides an end mill having an approximately 1/4 arcuate round blade at the tool tip and an outer peripheral blade at the outer periphery of the tool.
One end of the boundary between the rake surface of the round blade and the rake surface of the outer peripheral blade, and one end of the boundary between the flank of the round blade and the flank of the outer peripheral blade are points on the cutting edge ridge line. This is an end mill characterized by being substantially coincident. By adopting the above configuration, a regular shape could be easily obtained at the connecting portion between the radius blade and the outer peripheral blade with almost no grinding stone interference.
Here, "substantially coincident" refers to a difference between one end of the boundary between the rake face of the round blade and the rake surface of the outer peripheral blade and one end of the boundary between the flank of the round blade and the flank of the outer peripheral blade. However, the radius was set to 5% or less with respect to the radius of the radius edge in the tool axis direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The length of the rake face of a round blade in a cross section in the normal direction of the round blade is changed from the vicinity of the round blade of 60 ° to the round blade of 90 °, that is, the joint between the round blade and the outer peripheral blade. And the length of the rake face of the radius blade may be set to 0 at the approximately 90 ° radius edge.
The rake angle in the tool radial direction at the 0 ° part may be changed at an extreme angle of 5 ° or more at the rake angle. One end of the boundary between the rake face of the round blade and the rake face of the outer peripheral blade, and the escape of the round blade One end of the boundary between the surface and the flank of the outer peripheral edge can substantially coincide at a point on the cutting edge ridge line. In the vicinity of the joint between the radius blade and the outer peripheral blade, the angle difference between the torsion angle of the radius blade and the torsion angle of the outer peripheral blade may be less than 10 °, and slight interference of the grinding wheel occurs. Also in this case, since the connecting portion between the radius blade and the outer peripheral blade becomes smooth, the amount of shaving of the outer peripheral blade portion due to the grinding wheel interference can be minimized. For this reason, the angle difference is preferably as small as possible, and the angle is set to less than 10 °. When the angle is 10 ° or more, the diameter of the outer peripheral edge portion of the connecting portion between the radius edge and the outer peripheral edge is smaller than that of the stationary portion of the outer peripheral edge. This is because the tendency to be smaller than the blade diameter increases. Hereinafter, the present invention will be specifically described based on examples. (Embodiment 1) FIGS. 1 and 2 are enlarged views of a radius end mill 1 as an example 1 of the present invention applied to a radius end mill as viewed from a rake face side and a flank face side. A length 6 in the tool axial direction from the tip of the tool to one end of a boundary line 5 between the rake face 2 of the round blade 1 and the rake face 4 of the outer peripheral blade 3, a flank 7 of the round blade 1 and a flank of the outer peripheral blade 3 The length 10 in the tool axis direction up to one end of the boundary line 9 with 8 is almost the same length,
These are substantially matched at points on the cutting edge ridge line. FIGS. 3 and 4 are enlarged views of Conventional Example 2 as viewed from the rake face side and the flank side of the round blade 1, and the rake face 2 of the round blade 1 extends to the outer peripheral blade 3. A length 6 in the tool axis direction up to one end of a boundary line 5 between the rake face 2 of the round blade 1 and the rake face 4 of the outer peripheral blade 3, a flank surface 7 of the round blade 1 and a flank surface 8 of the outer peripheral blade 3. The difference from the one end of the boundary line 9 to the length 10 in the tool axis direction is apart from the radius of the radius edge by 10% or more in the tool axis direction. [0009] The above-mentioned Inventive Example 1 and Conventional Examples 2 and 3 were manufactured with a tool diameter of 12 mm, a corner radius of 2 mm, a three-blade, and an outer peripheral helix angle of 30 °, using ultrafine cemented carbide as a material. , TiAlN coating, and comparison of tool shape accuracy. Here, with respect to the present invention example 1, the radius of the R blade rake face in the cross section in the normal direction of the R blade is changed from the vicinity of the R blade 60 ° portion to the R blade 90 ° portion, that is, the connecting portion between the R blade and the outer peripheral blade. Continuously shorter towards
The radius of the rake face is approximately 0 at the 90 ° round edge and the rake angle in the tool radial direction is approximately − at the 90 ° round edge.
A rake angle change point that extremely changes from 5 ° to + 5 ° was set. Also, Conventional Example 2 was performed with the grinding wheel interference, and Conventional Example 4 was performed with the grinding wheel interference avoided. The results are shown in FIGS.
Shown in In contrast to the first example of the present invention, which is substantially identical to the regular shape, the second example of the prior art has a concave outer peripheral portion of the connecting portion between the radius blade and the outer peripheral blade, and the blade of the stationary portion of the outer peripheral blade. Was smaller than the diameter. Also, in Conventional Example 3, the radius edge portion of the joint between the radius blade and the outer peripheral blade swells. Was not obtained. Further, a cutting test was performed using Example 1 of the present invention and Conventional Examples 2 and 3. As for the cutting specifications, the work material is S55C material of structural carbon steel,
300 revolutions, feed rate 270 mm / min, tool radial direction cut 0.05 mm, tool axial direction cut 10 mm,
Wet cutting and down cutting were performed using a water-soluble cutting fluid, and machining accuracy and tool wear were observed. As a result, Invention Example 1
In the test, good machining accuracy was obtained, and the tool wear state was minute and uniform normal wear. In Conventional Examples 2 and 3, the tool accuracy was transferred to the workpiece as it was, the processing accuracy was poor, and a step was generated where the processing was performed near the joint between the radius blade and the outer peripheral blade. In addition, the tool wear state is such that the vicinity of the connecting portion between the round blade and the outer peripheral blade is protruded, so that the wear of this portion is larger than that of the other portions. (Embodiment 2) Next, using a radius end mill, a prehardened steel of HRC40 was used as a work material, and the length was 150 mm, the width was 18 mm, and the depth was 30 m.
m, processing of the groove-shaped pocket fitting portion with a side wall angle of 3 ° was performed at a rotation speed of 2600 rotations and a feed speed of 780 mm / mi.
n, contour line processing was performed by air blow at a tool axis direction pitch of 0.1 mm, and processing accuracy and tool wear were observed. As a result, in Example 1 of the present invention, a good machined surface and machining accuracy were obtained, the fitting state was good, and the tool abrasion state was minute and uniform normal wear. In Conventional Example 2, the outer peripheral edge portion of the connecting portion between the radius blade and the outer peripheral edge is concave, and is smaller than the blade diameter of the stationary portion of the outer peripheral edge. The condition was unsatisfactory, and the wear of the tool was also increased near the joint between the radius blade and the outer peripheral blade. Conventional product 3 is too sharp at the beginning of cutting because the radius blade portion of the joint between the radius blade and the outer peripheral blade is bulging, and when processing near the bottom, the wear of this portion is already extremely large, and Since chipping had occurred, uncut portions were left unremoved, and the processing accuracy was extremely poor. Further, in both of Conventional Examples 2 and 3, on the tapered side wall surface,
Numerous streaks were seen in the tool feed direction, and the machined surface became smoother as approaching the bottom. (Example 3) Next, in Example 1 of the present invention,
In the vicinity of the joint between the round blade and the outer peripheral blade, the torsion angle of the round blade is 10 ° as Example 4 of the present invention, and 1 ° as Example 5 of the present invention.
5 °, 20 ° as Invention Example 6, 22 as Invention Example 7
° and 24 ° as Example 8 of the present invention, and the tool shape accuracy was compared. Here, the difference between one end of the boundary line between the rake face of the round blade and the rake surface of the outer peripheral blade and one end of the boundary line between the flank of the round blade and the flank of the outer peripheral blade is allowed in the tool axis direction. It was set to 5%, that is, 0.1 mm with respect to the radius of the radius of the round blade which is the maximum value. As a result, in Examples 4 to 8 of the present invention, although the outer peripheral edge portion of the connecting portion between the radius blade and the outer peripheral edge is concave, the concave amount is less than 2 μm, which does not pose any problem on tool accuracy. there were. Among them, as the angle difference becomes smaller, the curvature of the concave portion and the amount of the concave portion tend to be smaller. When the amount of the concave portion is less than 1 μm in Example 6 of the present invention and in Examples 7 and 8 of the present invention, the concave shape is hardly distinguishable. Was. By applying the present invention as described above, an end mill which can be machined with high precision in finishing a mold or a machine part including a three-dimensional curved surface having a wall surface close to a vertical wall is provided. Could be provided.
【図面の簡単な説明】 【図１】図１は、本発明例１の正面図を示す。 【図２】図２は、図１の主要部拡大図を示す。 【図３】図３は、従来例２の正面図を示す。 【図４】図４は、図３の主要部拡大図を示す。 【図５】図５は、本発明例１の精度測定図を示す。 【図６】図６は、従来例２の精度測定図を示す。 【図７】図７は、従来例３の精度測定図を示す。 【符号の説明】 １ アール刃 ２ アール刃のすくい面 ３ 外周刃 ４ 外周刃のすくい面 ５ すくい面の境界線 ６ アール刃すくい面の工具軸方向長さ ７ アール刃の逃げ面 ８ 外周刃の逃げ面 ９ 逃げ面の境界線 １０ アール刃逃げ面の工具軸方向長さ[Brief description of the drawings] FIG. 1 shows a front view of Example 1 of the present invention. FIG. 2 is an enlarged view of a main part of FIG. 1; FIG. 3 is a front view of Conventional Example 2. FIG. 4 is an enlarged view of a main part of FIG. 3; FIG. 5 shows an accuracy measurement diagram of Example 1 of the present invention. FIG. 6 shows an accuracy measurement diagram of Conventional Example 2. FIG. 7 shows an accuracy measurement diagram of Conventional Example 3. [Explanation of symbols] 1 R blade 2 Rake face of R blade 3 Perimeter blade 4 Rake face of outer edge 5 Rake surface boundary 6 Length of rake face in the tool axis direction 7 flank of the blade 8 Flank of outer peripheral blade 9 Flank boundary 10 Length of flank of round edge in tool axis direction
Claims (1)
状のアール刃と工具外周にねじれを有する外周刃とを有
するエンドミルにおいて、該アール刃のすくい面と該外
周刃のすくい面との境界線の一端と、該アール刃の逃げ
面と該外周刃の逃げ面との境界線の一端とが、切れ刃稜
線上の点で略一致することを特徴とするエンドミル。Claims: 1. An end mill having an approximately 1/4 arc-shaped round blade having a twist at a tool tip portion and an outer peripheral blade having a twist on the outer periphery of a tool, the rake face of the round blade and the One end of the boundary between the rake face of the outer peripheral blade and one end of the boundary between the flank of the round blade and the flank of the outer peripheral blade substantially coincides at a point on the cutting edge ridge line. End mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001260710A JP2003071625A (en) | 2001-08-30 | 2001-08-30 | End mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001260710A JP2003071625A (en) | 2001-08-30 | 2001-08-30 | End mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003071625A true JP2003071625A (en) | 2003-03-12 |
Family
ID=19087870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001260710A Pending JP2003071625A (en) | 2001-08-30 | 2001-08-30 | End mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003071625A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010050391A1 (en) * | 2008-10-29 | 2010-05-06 | 住友電工ハードメタル株式会社 | Ball end mill |
| KR20170054396A (en) * | 2014-09-15 | 2017-05-17 | 이스카 엘티디. | End mill with convex radial relief surface and corner having circular arc profile |
| US20170144234A1 (en) * | 2015-11-23 | 2017-05-25 | Iscar, Ltd. | Cemented Carbide Corner Radius End Mill with Continuously Curved Rake Ridge and Helical Flute Design |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000334614A (en) * | 1999-05-26 | 2000-12-05 | Osg Corp | Ball end mill for nonferrous metal |
| JP2001025912A (en) * | 1999-07-15 | 2001-01-30 | Btt Kk | Ball end mill |
| JP2002052412A (en) * | 2000-08-08 | 2002-02-19 | Mitsubishi Materials Corp | Ball end mill |
-
2001
- 2001-08-30 JP JP2001260710A patent/JP2003071625A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000334614A (en) * | 1999-05-26 | 2000-12-05 | Osg Corp | Ball end mill for nonferrous metal |
| JP2001025912A (en) * | 1999-07-15 | 2001-01-30 | Btt Kk | Ball end mill |
| JP2002052412A (en) * | 2000-08-08 | 2002-02-19 | Mitsubishi Materials Corp | Ball end mill |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010050391A1 (en) * | 2008-10-29 | 2010-05-06 | 住友電工ハードメタル株式会社 | Ball end mill |
| US8870498B2 (en) | 2008-10-29 | 2014-10-28 | Sumitomo Electric Hardmetal Corp. | Ball end mill |
| KR20170054396A (en) * | 2014-09-15 | 2017-05-17 | 이스카 엘티디. | End mill with convex radial relief surface and corner having circular arc profile |
| JP2017526548A (en) * | 2014-09-15 | 2017-09-14 | イスカル リミテッド | End mill with convex radial flank and corner with arc profile |
| KR102350910B1 (en) | 2014-09-15 | 2022-01-13 | 이스카 엘티디. | End mill with convex radial relief surface and corner having circular arc profile |
| US20170144234A1 (en) * | 2015-11-23 | 2017-05-25 | Iscar, Ltd. | Cemented Carbide Corner Radius End Mill with Continuously Curved Rake Ridge and Helical Flute Design |
| US10131003B2 (en) * | 2015-11-23 | 2018-11-20 | Iscar, Ltd. | Cemented carbide corner radius end mill with continuously curved rake ridge and helical flute design |
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