JP4734265B2 - Radius end mill - Google Patents

Radius end mill Download PDF

Info

Publication number
JP4734265B2
JP4734265B2 JP2007024470A JP2007024470A JP4734265B2 JP 4734265 B2 JP4734265 B2 JP 4734265B2 JP 2007024470 A JP2007024470 A JP 2007024470A JP 2007024470 A JP2007024470 A JP 2007024470A JP 4734265 B2 JP4734265 B2 JP 4734265B2
Authority
JP
Japan
Prior art keywords
cutting edge
tool body
cutting
end mill
arc
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.)
Active
Application number
JP2007024470A
Other languages
Japanese (ja)
Other versions
JP2008188700A (en
Inventor
隆司 後藤
健志 渡辺
淳一 黒澤
工 小日向
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NS Tool Co Ltd
Original Assignee
NS Tool Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NS Tool Co Ltd filed Critical NS Tool Co Ltd
Priority to JP2007024470A priority Critical patent/JP4734265B2/en
Publication of JP2008188700A publication Critical patent/JP2008188700A/en
Application granted granted Critical
Publication of JP4734265B2 publication Critical patent/JP4734265B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Milling Processes (AREA)

Description

本発明は、ピックフィード切削によりワークの加工面を平坦に仕上げるラジアスエンドミルに関する。   The present invention relates to a radius end mill that finishes a processed surface of a workpiece flat by pick feed cutting.

従来、軸線回りに回転する工具本体の先端にほぼ円弧状の切刃が設けられ、該切刃に沿って両側にそれぞれすくい面と逃げ面が形成されると共に、前記切刃が、前記軸線を含む平面に平行にして該平面に直交する方向へ前記工具本体の軸線から所定距離だけずらして設けられているボールエンドミルが知られている（例えば、特許文献１参照）。
特開２００４−１４２０５５号公報 Conventionally, a substantially arc-shaped cutting edge is provided at the tip of a tool body that rotates about an axis, and a rake face and a flank are formed on both sides along the cutting edge. There is known a ball end mill that is provided in parallel to a plane to be included and shifted by a predetermined distance from the axis of the tool body in a direction perpendicular to the plane (for example, see Patent Document 1).
JP 2004-142055 A

前記ボールエンドミルは、前記切刃を工具本体の軸線からずらすことにより、切刃の中心付近でワークに対して周速を持たせることができ、切刃の摩耗量を低減して、加工面を高精度に仕上げることができるようにしたものである。しかし、前記ボールエンドミルは、前記切刃が工具本体の軸線からずらされているが、そのずらし量は僅かであって、切刃を、切刃を含む平面に直交する方向に工具本体の軸線から平行移動したものであるので、ピックフィード切削をする場合、切刃の円弧の半径と横送りのピッチの大きさとから定まるワーク加工面の表面粗度の関係から、前記横送りのピッチを大きく採ることができず、ワークの加工能率を十分に向上させることができない不満がある。
なお、ラジアスエンドミルを使用することにより、横送りのピッチを大きく採ってワークの加工をすることもできるが、通常のラジアスエンドミルによるピックフィード切削の場合、切刃のすくい角の角度設定によって隣接する縦送りの重なり合う部分に段差が生じ、それらが複合して切削面を荒らし、良好な仕上げ面を得ることできない問題がある。 The ball end mill can give the workpiece a peripheral speed near the center of the cutting edge by shifting the cutting edge from the axis of the tool body, reducing the amount of wear of the cutting edge, It can be finished with high precision. However, in the ball end mill, the cutting edge is shifted from the axis of the tool body, but the amount of shift is small, and the cutting edge is moved from the axis of the tool body in the direction perpendicular to the plane including the cutting edge. Because of the parallel movement, when pick-feed cutting is performed, the pitch of the lateral feed is set to be large from the relation of the surface roughness of the workpiece processing surface determined from the radius of the arc of the cutting edge and the size of the pitch of the lateral feed. There is dissatisfaction that the machining efficiency of the workpiece cannot be improved sufficiently.
By using a radius end mill, the workpiece can be machined with a large lateral feed pitch. However, in the case of pick feed cutting with a normal radius end mill, it is adjacent by setting the rake angle of the cutting edge. There is a problem that a step is generated in the overlapping portion of the vertical feeds, and they are combined to roughen the cutting surface and a good finished surface cannot be obtained.

本発明は、上記事情に鑑みてなされたものであって、ピックフィード切削におけるワークの加工面の平坦性を向上させることができ、加工能率を十分に向上させることができるラジアスエンドミルを提供することを目的とする。   The present invention has been made in view of the above circumstances, and provides a radius end mill that can improve the flatness of the work surface of a workpiece in pick-feed cutting and can sufficiently improve the working efficiency. With the goal.

本発明は、前記課題を解決するために、以下の点を特徴としている。
すなわち、本発明の請求項１に係るラジアスエンドミルは、軸線回りに回転する工具本体の先端面に、工具本体の軸線を含む直径方向の平面内で円弧状の刃先を有する切刃が、先方に突き出して１つ設けられると共に、該切刃の刃先に沿ってその両側にそれぞれ所定の傾斜角度で傾斜して山形状に形成された一対の刃面が形成され、工具本体の回転方向に応じて前記一対の刃面の一方は負のすくい面とされ他方は逃げ面とされてなる正逆回転可能なラジアスエンドミルであって、
前記切刃は、その刃先の円弧の頂点が工具本体の回転中心から外周方向に所定距離だけ偏心して設けられており、前記切刃の刃先は、頂点より工具本体の外側に位置する部分が四半円弧より小さい角度の円弧に形成され、頂点より工具本体の回転中心側に位置する部分が四半円弧に形成されていることを特徴としている。 The present invention is characterized by the following points in order to solve the above problems.
That is, in the radius end mill according to the first aspect of the present invention, the cutting edge having an arcuate cutting edge in the diametrical plane including the axis of the tool body is provided at the tip of the tool body rotating about the axis. A pair of blade surfaces formed in a mountain shape are formed on both sides along the cutting edge of the cutting blade at a predetermined inclination angle and are formed in accordance with the rotation direction of the tool body. One of the pair of blade surfaces is a negative rake surface and the other is a flank radius end mill capable of rotating forward and reverse,
The cutting edge of the cutting edge is provided such that the apex of the arc of the cutting edge is decentered by a predetermined distance from the rotation center of the tool body in the outer peripheral direction, and the cutting edge of the cutting edge is a quarter of the portion located outside the tool body. It is characterized in that it is formed in an arc having an angle smaller than the arc, and a portion located on the rotation center side of the tool body from the apex is formed in a quarter arc .

本発明によれば、以下の優れた効果を奏する。
すなわち、請求項１に係るラジアスエンドミルによれば、ピックフィード切削において、ボールエンドミルに比べて横送り量を大幅に大きくすることができて、高能率にワークＷの平面の仕上げ加工を行うことできる。また、隣接の縦送りの切削領域における、切刃の回転移動軌跡の外周側の互いに重なり合う部分のワークの切削面に、バリが発生するのを防止することができて、前記重なり合う部分に他の切削領域より高くなる段差が生じるといったことが無く、ワークの加工面全体が平坦に切削でき、良好な仕上げ面を得ることができる。 The present invention has the following excellent effects.
That is, according to the radius end mill according to the first aspect, in the pick-feed cutting, the lateral feed amount can be significantly increased as compared with the ball end mill, and the finishing of the plane of the workpiece W can be performed with high efficiency. . Further, in the adjacent vertical feed cutting region, it is possible to prevent burrs from being generated on the cutting surfaces of the overlapping parts of the workpiece on the outer peripheral side of the rotational movement locus of the cutting blade. A step that becomes higher than the cutting region does not occur, and the entire processed surface of the workpiece can be cut flat, and a good finished surface can be obtained.

また、切刃における頂点の工具本体の回転中心からの偏心距離を大きく、かつ切刃の円
弧の半径を大きくして切刃の切削幅を広げることにより、切刃による横送り方向における切削領域を広くすることができるので、工具の横送りのピッチをより大きく採ることができて、一層、切削効率を向上させることができる。

 In addition, by increasing the eccentric distance from the rotation center of the tool body at the apex of the cutting edge and increasing the radius of the arc of the cutting edge to increase the cutting width of the cutting edge, the cutting area in the lateral feed direction by the cutting edge is increased. Since the width can be increased, the pitch of the lateral feed of the tool can be increased, and the cutting efficiency can be further improved.

以下、本発明の実施の形態に係るラジアスエンドミルについて図面を参照して説明する。
図１〜図４は本発明の第１の実施の形態に係るラジアスエンドミル１を示す。このラジアスエンドミル１は、工具本体２と、該工具本体２の先端面２ａに設けた円弧状の切刃３とから構成されている。前記工具本体２は、所定直径の円形断面と所定長さを有する柱状部材であり、基端部２ｂ側が工作機械等の主軸に装着され、軸線Ｓを前記主軸の軸線に一致させて軸線回りに回転するようになっている。 Hereinafter, a radius end mill according to an embodiment of the present invention will be described with reference to the drawings.
1 to 4 show a radius end mill 1 according to a first embodiment of the present invention. The radius end mill 1 includes a tool main body 2 and an arcuate cutting edge 3 provided on a tip surface 2 a of the tool main body 2. The tool body 2 is a columnar member having a circular cross section with a predetermined diameter and a predetermined length, the base end 2b side is attached to a main shaft of a machine tool or the like, and the axis S is made to coincide with the axis of the main shaft around the axis. It is designed to rotate.

前記工具本体２の先端面２ａには、工具本体２の軸線Ｓの軸線位置（回転中心）Ｃ１から直径方向の外周側に偏心した位置に、先方に突き出して切刃形成部４が一体に設けられている。前記切刃形成部４は、前記工具本体４の軸線位置Ｃ１を通る直径方向の直線Ｌ１を含む平面に平行であり、該平面から所定の等距離Ｈ／２を隔てて前記工具本体２の先端面２ａに垂直に設けられた側壁面４ａ，４ａと、前記直線Ｌ１に沿って工具本体２の軸線位置Ｃ１側に寄った位置において前記側壁面４ａ，４ａに直交して工具本体２の先端面に垂直に設けられた前壁面４ｂと、前記前壁面４ｂと反対側（工具本体２の外周側）に設けられ、前記工具本体２の外周面と前記直線Ｌ１との交点ｅからその両側において徐々に中心側へ寄るように傾斜した一対の傾斜面４ｃ，４ｄとを有し、平面視で略五角形状に形成されている。   The tip surface 2a of the tool body 2 is integrally provided with a cutting edge forming portion 4 that protrudes forward at a position eccentric from the axial position (rotation center) C1 of the axis S of the tool body 2 to the outer peripheral side in the diameter direction. It has been. The cutting edge forming portion 4 is parallel to a plane including a diametrical straight line L1 passing through the axial position C1 of the tool body 4, and the tip of the tool body 2 is separated from the plane by a predetermined equal distance H / 2. Side wall surfaces 4a, 4a provided perpendicular to the surface 2a, and a tip surface of the tool body 2 perpendicular to the side wall surfaces 4a, 4a at a position close to the axial position C1 side of the tool body 2 along the straight line L1 A front wall surface 4b provided perpendicularly to the front wall surface 4b, and provided on the opposite side of the front wall surface 4b (the outer peripheral side of the tool body 2), and gradually from both intersections e of the outer peripheral surface of the tool body 2 and the straight line L1. And a pair of inclined surfaces 4c and 4d inclined so as to approach the center side, and are formed in a substantially pentagonal shape in plan view.

そして、前記切刃形成部４の先端には、前記直線Ｌ１を含む軸線Ｓに沿う平面内（軸線Ｓを含む直径方向の平面内）で円弧状をなし、かつ前記平面に沿う直刃である前記切刃３が形成されている。該切刃３は、その素材が超硬合金、サーメット、ＣＢＮ焼結体（立方晶窒化硼素）、ダイヤモンド焼結体（ＰＣＤ）からなる超硬質合金および単結晶ダイヤモンド等からなり、図２に示すように、正面視で、工具本体２の軸線位置Ｃ１から外周方向に所定の偏心距離ｄだけ偏心し、前記工具本体２の先端面２ａより先方へ所定距離ｈだけ離れた位置に中心Ｃ２を有する半径ｒの半円弧に形成された刃先３ｃを有している。前記切刃３における刃先３ｃの工具本体２の外周側の部分は、前記工具本体２の外周から先方へ延長された前記切刃形成部４の前記傾斜面４ｃ，４ｄの交点ｅにおける稜線部４ｅに接するように接続され、工具本体２の軸線位置Ｃ１寄りの部分は、半円の終端からその接線方向の稜線として前記切刃形成部４の段部４ｆの上面まで延長されている。すなわち、前記切刃３は、その刃先３ｃが正面視で工具本体２の外周側において工具本体２の外周に接する、頂点５を中心にして対称な半円弧に形成されている。   The tip of the cutting blade forming portion 4 is a straight blade that forms an arc shape in a plane along the axis S including the straight line L1 (in the diametrical plane including the axis S) and extends along the plane. The cutting edge 3 is formed. The cutting blade 3 is made of a cemented carbide, a cermet, a CBN sintered body (cubic boron nitride), a cemented carbide composed of a diamond sintered body (PCD), single crystal diamond, or the like, as shown in FIG. As described above, when viewed from the front, the tool body 2 is decentered by a predetermined eccentric distance d from the axial position C1 in the outer circumferential direction, and has a center C2 at a position away from the tip surface 2a of the tool body 2 by a predetermined distance h. It has a cutting edge 3c formed in a semicircular arc having a radius r. A portion of the cutting edge 3 on the outer peripheral side of the tool body 2 of the cutting edge 3c is a ridge line portion 4e at an intersection e of the inclined surfaces 4c and 4d of the cutting blade forming portion 4 extended from the outer periphery of the tool main body 2 to the front. The portion of the tool body 2 near the axis position C1 extends from the end of the semicircle to the upper surface of the stepped portion 4f of the cutting edge forming portion 4 as a tangential ridgeline. That is, the cutting edge 3 is formed in a semicircular arc symmetrical about the vertex 5 with the cutting edge 3c contacting the outer periphery of the tool body 2 on the outer periphery side of the tool body 2 in a front view.

また、前記切刃３は、前記直線Ｌ１を含む平面に直交して前記切刃３の円弧の中心Ｃ２を通る面でのいずれの断面においても、その断面方向に各断面に直交する面６から所定傾斜角度θ１，θ２で傾斜した一対の刃面３ａ，３ｂが交差して山形状に形成された稜線で前記刃先３ｃが構成され、前記刃面３ａ，３ｂの工具本体２の外周部側は、前記切刃形成部４の前記傾斜部４ｃ，４ｄにそれぞれ滑らかに接続されている。したがって、切刃３は、平面視でそろばん玉の平面形状にされ、全体としてそろばん玉をその軸方向の分割面で二分した形状に形成されている。
前記工具本体２がイ矢方向に回転する場合には、先行する一方の刃面３ａが切刃３の一側に負のすくい面を形成し、後進する他方の刃面３ｂが逃げ面を形成し、工具本体２が反対に回転する場合には、前記刃面３ｂがすくい面を形成し、刃面３ａが逃げ面を形成することとなる。 In addition, the cutting edge 3 extends from a plane 6 orthogonal to each cross section in the cross section direction in any cross section in a plane orthogonal to the plane including the straight line L1 and passing through the center C2 of the arc of the cutting edge 3. The cutting edge 3c is composed of a ridge line formed in a mountain shape by intersecting a pair of blade surfaces 3a, 3b inclined at a predetermined inclination angle θ1, θ2, and the outer peripheral side of the tool body 2 of the blade surfaces 3a, 3b is The cutting blade forming portion 4 is smoothly connected to the inclined portions 4c and 4d, respectively. Therefore, the cutting edge 3 is formed into a flat shape of the abacus balls in a plan view, and is formed into a shape obtained by dividing the abacus balls by the axial dividing surface as a whole.
When the tool body 2 rotates in the arrow direction, the preceding one blade surface 3a forms a negative rake surface on one side of the cutting blade 3, and the other blade surface 3b moving backward forms a flank surface. When the tool body 2 rotates in the opposite direction, the blade surface 3b forms a rake surface, and the blade surface 3a forms a flank surface.

前記刃面３ａがすくい面となる場合、前記傾斜角度（すくい角）θ１は２０°〜７０°の範囲に設定され、逃げ面となる前記刃面３ｂの傾斜角度θ２は、３０°〜８０°の範囲に設定され、かつそれらの傾斜角度θ１，θ２の合計である切れ角度は、５０°〜１５０°の範囲に設定されている。前記切刃３の稜線部（刃先３ｃ）に、該切刃３（刃先３ｃ）の円弧の中心Ｃ２の軸線Ｌ２の方向に沿って幅ｂが０．０１〜０．１ｍｍのマージン７を設けると、被削材が高硬度材であっても、工具欠損を抑制して良好な仕上げ面を得ることができる。しかし、通常の被削材を切削する場合には、前記マージン７は無くてもよい。
なお、工具本体２の先端の外周部には、前記切刃形成部４付近を除いて工具本体２の軸線Ｓに略４５°傾斜した面取り部２ｃが設けられ、また、工具本体２の基端の外周にも周方向に沿う面取り部２ｄが設けられている。 When the blade surface 3a is a rake surface, the inclination angle (rake angle) θ1 is set in a range of 20 ° to 70 °, and the inclination angle θ2 of the blade surface 3b serving as a flank surface is 30 ° to 80 °. And the cutting angle that is the sum of the inclination angles θ1 and θ2 is set in the range of 50 ° to 150 °. When a margin 7 having a width b of 0.01 to 0.1 mm is provided in the ridge line portion (cutting edge 3c) of the cutting edge 3 along the direction of the axis L2 of the center C2 of the arc of the cutting edge 3 (cutting edge 3c). Even if the work material is a high-hardness material, it is possible to obtain a good finished surface while suppressing tool breakage. However, when cutting a normal work material, the margin 7 may be omitted.
In addition, a chamfered portion 2 c inclined by about 45 ° with respect to the axis S of the tool body 2 except for the vicinity of the cutting edge forming portion 4 is provided on the outer peripheral portion of the tip of the tool body 2. A chamfered portion 2d along the circumferential direction is also provided on the outer periphery.

前記のように構成された実施の形態に係るラジアスエンドミル１においては、前記工具本体２が、その基端部２ｂ側を介して工作機械の主軸に装着されて、図１でイ矢方向に回転されながら、ワークＷに所定の切り込み深さｔを与えられて、例えば、図５に示すように、所定の送り速度でｘ方向におけるロ矢向きに縦送りされ、前記切刃３によってワークＷの表面の仕上げ加工が行われる。そして、前記縦送りが所定のストロークに達すると、そのストローク端で１ピッチＰだけ、前記縦送り方向に直角なｙ方向に横送り（ピックフィード）された後、前記縦送り方向と反対のハ矢向きに縦送りされて元のストローク端に戻る。さらに、同様に縦送りと横送りを繰り返してワークＷの所定領域の表面の平面仕上げ加工を終了する。   In the radius end mill 1 according to the embodiment configured as described above, the tool main body 2 is mounted on the spindle of the machine tool via the base end 2b side, and rotates in the direction of arrow I in FIG. However, given a predetermined cutting depth t to the workpiece W, for example, as shown in FIG. 5, the workpiece W is longitudinally fed in the direction of arrow X in the x direction at a predetermined feeding speed. Surface finishing is performed. When the vertical feed reaches a predetermined stroke, it is laterally fed (pick feed) in the y direction perpendicular to the vertical feed direction by 1 pitch P at the end of the stroke, and then opposite to the vertical feed direction. Moves vertically in the direction of the arrow and returns to the original stroke end. Further, similarly, the vertical feed and the horizontal feed are repeated to finish the surface finishing of the surface of the predetermined area of the workpiece W.

前記ラジアスエンドミル１によるピックフィード切削においては、前記切刃３が、図５に示すように、前記工具本体２の軸線位置Ｃ１から切刃３の頂点５までの偏心距離ｄの２倍の平均直径Ｄを有し、平面視でワークＷに対する切り込み深さｔに対応する切削幅Ｇを有するトロコイド曲線状の回転移動軌跡ｋを描きながら縦送りされてワークＷを切削し、縦送りのストローク端で前記平均直径Ｄより僅かに小さい距離以下のピッチＰだけ横送りされて切削が継続されることとなる。   In the pick-feed cutting by the radius end mill 1, the cutting edge 3 has an average diameter that is twice the eccentric distance d from the axial position C1 of the tool body 2 to the vertex 5 of the cutting edge 3, as shown in FIG. The workpiece W is vertically fed while drawing a trochoidal curvilinear rotational movement locus k having a cutting width G corresponding to the cutting depth t with respect to the workpiece W in plan view. Cutting is continued by being laterally fed by a pitch P of a distance slightly smaller than the average diameter D.

したがって、従来のボールエンドミルに比べて横送り量（ピッチＰ）を大幅に大きくすることができて、高能率にワークＷの平面の仕上げ加工を行うことができる。また、隣接の縦送りの切削領域において、切刃３の前記回転移動軌跡ｋの外周側の部分が互いに重なり合うが、前記切刃３がすくい角θ１を前記のように比較的大きな所定の負角に設定されているので、ワークＷの切削面にバリが発生するのを防止することができ、重なり合う部分Ｍにバリが複合、干渉し合って仕上げ面が粗くなって、該重なり合う部分Ｍに他の切削領域より高くなる段差が生じるといったことが無く、ワークＷの加工面全体が平坦に切削でき、良好な仕上げ面を得ることができる。
また、前記ラジアスエンドミル１において、前記切刃３の刃先３ｃが、工具本体２の外周側において工具本体２の外周に接する、頂点５を中心にして対称な半円弧に形成された構成とされているので、通常のラジアスエンドミルとしての機能を果たすことができ、かつ形状加工において、良好な仕上げ面を継続することが可能である。 Accordingly, the lateral feed amount (pitch P) can be greatly increased as compared with the conventional ball end mill, and the finishing of the plane of the workpiece W can be performed with high efficiency. In the adjacent vertical feed cutting region, the outer peripheral portions of the rotational movement locus k of the cutting blade 3 overlap each other, but the cutting blade 3 has a rake angle θ1 that is a relatively large predetermined negative angle as described above. Therefore, burrs can be prevented from occurring on the cutting surface of the workpiece W, and burrs are combined in the overlapping portion M and interfere with each other, resulting in a rough finish surface. Therefore, the entire processed surface of the workpiece W can be cut flat and a good finished surface can be obtained.
Further, in the radius end mill 1, the cutting edge 3 c of the cutting edge 3 is formed in a semicircular arc symmetrical about the vertex 5, which is in contact with the outer periphery of the tool body 2 on the outer periphery side of the tool body 2. Therefore, it can function as a normal radius end mill, and a good finished surface can be continued in the shape processing.

次に、図６〜図９は本発明の第２の実施の形態に係るラジアスエンドミル１０を示す。このラジアスエンドミル１０は、前記ラジアスエンドミル１が切刃３の刃先３ｃを工具本体２の外周側において工具本体２の外周に接する、頂点５を中心にして対称な半円弧に形成したのに対して、切刃３Ａの刃先３ｃを、頂点５より工具本体２の外側に位置する部分が四半円弧より小さい角度の円弧に形成し、頂点５より工具本体２の軸線位置（回転中心）Ｃ１側に位置する部分を四半円に形成した構成としたものである。その他の基本構成は、前記ラジアスエンドミル１と同じであるので、同一または同様な構成部分には同一の符号を付してそれらの説明は省略する。   Next, FIGS. 6 to 9 show a radius end mill 10 according to a second embodiment of the present invention. In contrast to the radius end mill 10, the radius end mill 1 is formed in a symmetric semicircular arc centering on the vertex 5, in which the cutting edge 3 c of the cutting edge 3 is in contact with the outer periphery of the tool body 2 on the outer peripheral side of the tool body 2. The edge 3c of the cutting edge 3A is formed in an arc having an angle smaller than the quarter arc by the part located outside the tool body 2 from the vertex 5, and is positioned on the axis position (rotation center) C1 side of the tool body 2 from the vertex 5. The portion to be formed is a quarter circle. Since the other basic configuration is the same as that of the radius end mill 1, the same or similar components are denoted by the same reference numerals, and description thereof is omitted.

前記ラジアスエンドミル１０の場合、前記切刃３Ａにおける刃先３ｃの円弧の半径ｒは前記ラジアスエンドミル１の切刃３における刃先３ｃの円弧の半径より大きく設定され、切刃３Ａの刃先３ｃにおける円弧の中心Ｃ２から工具本体２の軸線位置Ｃ１までの偏心距離ｄも前記切刃３のものより大きく設定され、また、切刃３Ａの全体の厚さＨも前記切刃３の厚さより厚くされている。そして、切刃形成部４の工具本体２の外周側に対応する部分が、前記切刃３Ａと連絡する位置まで工具本体２の外周面の延長面として平面視で円弧面４ｇに形成されている。なお、前記切刃３Ａの軸線位置Ｃ１側の部分は、該軸線位置Ｃ１の手前に止まっているが、該軸線位置Ｃ１を超えて反対側へ達するようにしてもよい。   In the case of the radius end mill 10, the radius r of the arc of the cutting edge 3c of the cutting edge 3A is set larger than the radius of the arc of the cutting edge 3c of the cutting edge 3 of the radius end mill 1, and the center of the arc of the cutting edge 3c of the cutting edge 3A is set. The eccentric distance d from C2 to the axial position C1 of the tool body 2 is also set larger than that of the cutting blade 3, and the overall thickness H of the cutting blade 3A is also thicker than the thickness of the cutting blade 3. And the part corresponding to the outer peripheral side of the tool main body 2 of the cutting blade formation part 4 is formed in the circular arc surface 4g by planar view as an extension surface of the outer peripheral surface of the tool main body 2 to the position which contacts the said cutting blade 3A. . In addition, although the part by the side of the axial line C1 of the said cutting-blade 3A has stopped before this axial line position C1, you may make it reach to the other side exceeding this axial line position C1.

第２の実施の形態に係るラジアスエンドミル１０によれば、前記第１の実施の形態に係るラジアスエンドミル１と同様に作用して、ワークＷの平面のピックフィード切削による仕上げ加工が行われて、同様な効果を奏することができる。加えて、前記切刃３Ａの刃先３ｃが、頂点５より工具本体２の外側に位置する部分が四半円より小さい角度の円弧に形成され、頂点５より工具本体２の軸線位置（回転中心）Ｃ１側に位置する部分が四半円弧に形成された構成とされているので、前記切刃３Ａの工具本体２の軸線位置Ｃ１からの偏心距離ｄを大きくし、かつ切刃３Ａの切削幅Ｇを広げることにより、切刃３Ａによる横送り方向における切削領域を広くすることができ、これにより、工具の横送りのピッチＰをより大きく採ることができて、前記ラジアスエンドミル１による場合より一層切削効率を向上させることができる。さらに、切刃３Ａの厚さＨを大きくすることができるので、その剛性を高めることができ、高硬度の被削材を折損することなく良好に切削することができる。   According to the radius end mill 10 according to the second embodiment, the finishing process is performed by pick-feed cutting on the plane of the workpiece W in the same manner as the radius end mill 1 according to the first embodiment. Similar effects can be achieved. In addition, the cutting edge 3c of the cutting edge 3A is formed in an arc having an angle smaller than a quarter circle at the outer side of the tool body 2 from the vertex 5, and the axial position (rotation center) C1 of the tool body 2 from the vertex 5 Since the portion located on the side is formed in a quarter arc, the eccentric distance d of the cutting blade 3A from the axial position C1 of the tool body 2 is increased, and the cutting width G of the cutting blade 3A is increased. Thus, the cutting area in the lateral feed direction by the cutting edge 3A can be widened, and thereby the pitch P of the lateral feed of the tool can be taken larger, and the cutting efficiency can be further improved as compared with the case of the radius end mill 1. Can be improved. Furthermore, since the thickness H of the cutting edge 3A can be increased, the rigidity thereof can be increased, and the high-hardness work material can be cut well without breaking.

以上説明したように、実施の形態に係るラジアスエンドミル１，１０は、軸線Ｓ回りに回転する工具本体２の先端面２ａに、工具本体２の軸線Ｓを含む直径方向の平面内で円弧状の刃先３ｃを有する切刃３が、切刃形成部４を介して先方に突き出して設けられると共に、該切刃３に沿ってその両側にそれぞれすくい面としての刃面３ａと逃げ面としての刃面３ｂが形成されたラジアスエンドミルにおいて、前記切刃３がその刃先３ｃの円弧の頂点５を工具本体２の軸線位置（回転中心）Ｃ１から外周方向に所定の偏心距離ｄだけ偏心された構成とされている。   As described above, the radius end mills 1, 10 according to the embodiment have an arcuate shape in the diametric plane including the axis S of the tool body 2 on the tip surface 2 a of the tool body 2 rotating around the axis S. A cutting edge 3 having a cutting edge 3c is provided so as to protrude forward through the cutting edge forming portion 4, and a cutting edge 3a as a rake face and a cutting edge as a flank on each side of the cutting edge 3 In the radius end mill in which 3b is formed, the cutting edge 3 is configured such that the apex 5 of the arc of the cutting edge 3c is eccentric from the axial position (rotation center) C1 of the tool body 2 by a predetermined eccentric distance d in the outer circumferential direction. ing.

したがって、前記実施の形態に係るラジアスエンドミル１，１０によれば、ピックフィード切削において、ボールエンドミルに比べて横送り量（ピッチＰ）を大幅に大きくすることができて、高能率にワークＷの平面の仕上げ加工を行うことできる。また、隣接の縦送りの切削領域において、切刃３，３Ａ（刃先３ｃ）の前記回転移動軌跡ｋの外周側の互いに重なり合う部分ＭのワークＷの切削面にバリが発生するのを防止することができて、前記重なり合う部分Ｍに他の切削領域より高くなる段差が生じるといったことが無く、ワークＷの加工面全体が平坦に切削でき、良好な仕上げ面を得ることができる。   Therefore, according to the radius end mills 1 and 10 according to the above-described embodiment, in the feed feed cutting, the lateral feed amount (pitch P) can be significantly increased as compared with the ball end mill, and the work W can be efficiently performed. Plane finishing can be performed. Further, in the adjacent vertical feed cutting region, it is possible to prevent burrs from occurring on the cutting surfaces of the workpieces W of the overlapping portions M on the outer peripheral side of the rotational movement locus k of the cutting blades 3 and 3A (the cutting edge 3c). Thus, there is no step which becomes higher than the other cutting regions in the overlapping portion M, and the entire processed surface of the workpiece W can be cut flat, and a good finished surface can be obtained.

なお、本発明の実施の形態に係るラジアスエンドミル１，１０においては、前記切刃形成部４の段部４ｆの上面を工具本体２の先端面２ａと面一にして該段部４ｆと前壁面４ｂを無くし、前記軸線位置Ｃ１側の切刃３，３Ａｃの刃面３ａ，３ｂを前記先端面２ａに達するまで該先端面２ａに垂直に向けて延長させてもよく、また、前記刃先３ｃの半径ｒの中心Ｃ２の位置を前記工具本体２の先端面２ａに一致させ（距離ｈをゼロとし）て、前記切刃３，３Ａｃの工具本体２の先端面２ａからの突き出し長さを小さくするようにしてもよい。
さらに、本発明の実施の形態に係るラジアスエンドミル１，１０前記切刃３，３Ａを１個だけ設けた例を示したが、本発明はこれに限らず、２個またはそれ以上設けることができる。 In the radius end mills 1 and 10 according to the embodiment of the present invention, the upper surface of the stepped portion 4f of the cutting edge forming portion 4 is flush with the tip end surface 2a of the tool body 2, and the stepped portion 4f and the front wall surface are formed. 4b may be eliminated, and the blade surfaces 3a and 3b of the cutting blades 3 and 3Ac on the axis position C1 side may be extended perpendicularly to the tip surface 2a until reaching the tip surface 2a. The position of the center C2 of the radius r is made to coincide with the tip surface 2a of the tool body 2 (the distance h is set to zero), and the protruding length of the cutting blades 3, 3Ac from the tip surface 2a of the tool body 2 is reduced. You may do it.
Furthermore, although the example which provided the radius end mill 1 which concerns on embodiment of this invention 1,10 only the said cutting blade 3,3A was shown, this invention is not restricted to this, Two or more can be provided. .

本発明の第１の実施の形態に係るラジアスエンドミルを示す平面図である。It is a top view which shows the radius end mill which concerns on the 1st Embodiment of this invention. 同じく正面図である。It is also a front view. 同じく右側面図である。Similarly, it is a right side view. 同じく左側面図である。Similarly, it is a left side view. ラジアスエンドミルによるピックフィード切削の説明図である。It is explanatory drawing of the pick feed cutting by a radius end mill. 本発明の第２の実施の形態に係るラジアスエンドミルを示す平面図である。It is a top view which shows the radius end mill which concerns on the 2nd Embodiment of this invention. 同じく正面図である。It is also a front view. 同じく右側面図である。Similarly, it is a right side view. 同じく左側面図である。Similarly, it is a left side view.

符号の説明Explanation of symbols

１，１０ ラジアスエンドミル
２，工具本体
２ａ 先端面
３，３Ａ 切刃
３ａ，３ｂ 刃面
３ｃ 刃先
４ 切刃形成部
５ 頂点
７ マージン
Ｃ１ 軸線位置（回転中心）
Ｃ２ 円弧の中心
ｄ 偏心距離
Ｈ 厚さ
Ｓ 軸線
Ｐ ピッチ
θ１，θ２ 傾斜角度 DESCRIPTION OF SYMBOLS 1,10 Radius end mill 2, Tool main body 2a Tip surface 3, 3A Cutting edge 3a, 3b Cutting edge 3c Cutting edge 4 Cutting edge forming part 5 Vertex 7 Margin C1 Axis position (rotation center)
C2 Arc center d Eccentric distance H Thickness S Axis P Pitch θ1, θ2 Tilt angle

Claims (1)

軸線回りに回転する工具本体の先端面に、工具本体の軸線を含む直径方向の平面内で円弧状の刃先を有する切刃が、先方に突き出して１つ設けられると共に、
該切刃の刃先に沿ってその両側にそれぞれ所定の傾斜角度で傾斜して山形状に形成された一対の刃面が形成され、工具本体の回転方向に応じて前記一対の刃面の一方は負のすくい面とされ他方は逃げ面とされてなる正逆回転可能なラジアスエンドミルであって、
前記切刃は、その刃先の円弧の頂点が工具本体の回転中心から外周方向に所定距離だけ偏心して設けられており、
前記切刃の刃先は、頂点より工具本体の外側に位置する部分が四半円弧より小さい角度の円弧に形成され、頂点より工具本体の回転中心側に位置する部分が四半円弧に形成されていることを特徴とするラジアスエンドミル。 A cutting edge having an arcuate cutting edge in a diametrical plane including the axis of the tool body is provided on the front end surface of the tool body rotating around the axis, protruding one side, and provided.
A pair of blade surfaces formed in a mountain shape are formed on both sides of the cutting blade at a predetermined inclination angle on both sides thereof, and one of the pair of blade surfaces depends on the rotation direction of the tool body. A radius end mill capable of rotating forward and reverse, with a negative rake face and the other flank face,
The cutting edge is provided with the vertex of the arc of the cutting edge eccentrically provided by a predetermined distance in the outer circumferential direction from the rotation center of the tool body ,
The cutting edge of the cutting blade is formed such that a portion located outside the tool body from the apex is formed in an arc having an angle smaller than a quarter arc, and a portion located on the rotation center side of the tool body from the apex is formed in a quarter arc. Radius end mill characterized by
JP2007024470A 2007-02-02 2007-02-02 Radius end mill Active JP4734265B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007024470A JP4734265B2 (en) 2007-02-02 2007-02-02 Radius end mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007024470A JP4734265B2 (en) 2007-02-02 2007-02-02 Radius end mill

Publications (2)

Publication Number Publication Date
JP2008188700A JP2008188700A (en) 2008-08-21
JP4734265B2 true JP4734265B2 (en) 2011-07-27

Family

ID=39749300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007024470A Active JP4734265B2 (en) 2007-02-02 2007-02-02 Radius end mill

Country Status (1)

Country Link
JP (1) JP4734265B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4995228B2 (en) * 2009-05-13 2012-08-08 ダンロップスポーツ株式会社 Manufacturing method of golf club head
JP2012125863A (en) * 2010-12-14 2012-07-05 Toshiba Mach Co Ltd Radius end mill of single-bladed structure
CN109811818B (en) * 2019-02-27 2023-10-03 江苏徐工工程机械研究院有限公司 Cutting pick milling wheel of double-wheel slot milling machine
JP7089574B2 (en) * 2020-12-01 2022-06-22 芝浦機械株式会社 Processing machine and manufacturing method of workpiece

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295811U (en) * 1985-12-03 1987-06-18
JPH05277823A (en) * 1992-03-31 1993-10-26 Nisshin Koki Kk End mill
JPH06170632A (en) * 1991-09-30 1994-06-21 Franz-Josef Pokolm Milling cutter head
JP2003245815A (en) * 2002-02-26 2003-09-02 Nikon Corp Method for manufacturing polygon reflecting mirror
JP2004142055A (en) * 2002-10-25 2004-05-20 Nisshin Kogu Kk Ball endmill
JP2005212015A (en) * 2004-01-28 2005-08-11 Fuji Photo Film Co Ltd Cutting tool
JP2006212744A (en) * 2005-02-04 2006-08-17 Nisshin Kogu Kk End mill
JP2006334768A (en) * 2005-06-06 2006-12-14 Nidec Sankyo Corp Manufacturing method of optical element and optical the element

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0624171B2 (en) * 1985-10-23 1994-03-30 株式会社日立メディコ Autotransformer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295811U (en) * 1985-12-03 1987-06-18
JPH06170632A (en) * 1991-09-30 1994-06-21 Franz-Josef Pokolm Milling cutter head
JPH05277823A (en) * 1992-03-31 1993-10-26 Nisshin Koki Kk End mill
JP2003245815A (en) * 2002-02-26 2003-09-02 Nikon Corp Method for manufacturing polygon reflecting mirror
JP2004142055A (en) * 2002-10-25 2004-05-20 Nisshin Kogu Kk Ball endmill
JP2005212015A (en) * 2004-01-28 2005-08-11 Fuji Photo Film Co Ltd Cutting tool
JP2006212744A (en) * 2005-02-04 2006-08-17 Nisshin Kogu Kk End mill
JP2006334768A (en) * 2005-06-06 2006-12-14 Nidec Sankyo Corp Manufacturing method of optical element and optical the element

Also Published As

Publication number Publication date
JP2008188700A (en) 2008-08-21

Similar Documents

Publication Publication Date Title
JP5475808B2 (en) Rotating tools and cutting inserts for cutting
KR101478695B1 (en) Cutting insert and cutting tool, and cut workpiece manufacturing method using same
JP5744235B2 (en) Radius end mill
CN109641293B (en) Cutting insert and indexable insert type rotary cutting tool
JP5589244B2 (en) insert
JP2018534159A (en) Turning insert and method
KR20080027733A (en) A tool for chip removing machining and a cutting insert therefor
JPWO2005102572A1 (en) Ball end mill
JPWO2011092883A1 (en) Cutting insert, cutting tool, and method of manufacturing a cut product using the same
CN108430682B (en) Thread cutting tool
JP5983901B1 (en) Cutting insert and cutting edge exchangeable rotary cutting tool
JP4734265B2 (en) Radius end mill
JP2015062978A (en) Ball end mill
JP2003053620A (en) Cutting bit and milling tool for milling operation
JP7527796B2 (en) Multi-blade ball end mill and machining method thereof
JP5312538B2 (en) Throwaway end mill
JP5663377B2 (en) Processed product manufacturing method
JP7488349B2 (en) Method for manufacturing cutting insert, rotary tool, and machined product
JP4048685B2 (en) Throwaway tip
JP2008100316A (en) Cutting tool, and finishing blade insert
JP7104182B2 (en) ball end mills and cutting inserts
WO2023054574A1 (en) Rotary tool, and method for manufacturing cut workpiece
JP2013198978A (en) Ceramic cutting tip for hard machining by cutting
JP7419059B2 (en) end mill
CN113396026B (en) Turning insert for metal cutting

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100112

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100420

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100616

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101102

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110405

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110425

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140428

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4734265

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250