JPH07237026A - Throwaway tip and cutter - Google Patents
Throwaway tip and cutterInfo
- Publication number
- JPH07237026A JPH07237026A JP3063794A JP3063794A JPH07237026A JP H07237026 A JPH07237026 A JP H07237026A JP 3063794 A JP3063794 A JP 3063794A JP 3063794 A JP3063794 A JP 3063794A JP H07237026 A JPH07237026 A JP H07237026A
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- flank
- throw
- main cutting
- away tip
- 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.)
- Granted
Links
Landscapes
- Milling Processes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スローアウェイチップ
及びこれが装着された正面フライスやエンドミル等のス
ローアウェイ式カッタに関するものであって、特にカッ
タ本体の先端外周部にスローアウェイチップが装着され
て、被削材の直角削り（９０度肩壁削り）ができるよう
にしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away tip and a throw-away type cutter such as a face mill and an end mill to which the throw-away tip is attached. It is designed so that the work material can be cut at a right angle (90 degree shoulder wall grinding).
【０００２】[0002]
【従来の技術】従来、この種のスローアウェイ式カッタ
に装着されるスローアウェイチップとして、例えば図２
２及び２３に示すように、正面フライス等のフライスカ
ッタ１の外周側に取り付けられた方形で板状のチップ２
がある。このスローアウェイチップ２は、図２２に示す
ように、着座面をなす下面３と対向する上面４を有して
おり、その四周側面５は下面３から上面４に向けて外側
に傾斜する平面をなしている。各側面５と上面４とが交
差する稜線はそれぞれ主切刃６をなし、各主切刃６の同
一稜線上のコーナー部４ａ近傍には副切刃７が形成され
ている。そして、上面４がすくい面をなし、側面５が主
切刃６と副切刃７の逃げ面をなしており、主切刃逃げ面
と副切刃逃げ面とが同一面（側面５）とされている。
又、上面４の中央部には、上下面を貫通してチップ２を
カッタ等に装着固定するためのネジ穴８が穿設されてい
る。2. Description of the Related Art Conventionally, as a throw-away tip attached to this kind of throw-away type cutter, for example, FIG.
As shown in 2 and 23, a rectangular plate-shaped chip 2 mounted on the outer peripheral side of a milling cutter 1 such as a face mill
There is. As shown in FIG. 22, the throw-away tip 2 has an upper surface 4 that faces a lower surface 3 that forms a seating surface, and four side surfaces 5 of the throwing edge are flat surfaces that incline outward from the lower surface 3 toward the upper surface 4. I am doing it. The ridge line where each side surface 5 and the upper surface 4 intersect forms a main cutting edge 6, and a sub cutting edge 7 is formed in the vicinity of a corner portion 4a on the same ridge line of each main cutting edge 6. Then, the upper surface 4 forms a rake surface, and the side surface 5 forms a flank of the main cutting edge 6 and the sub cutting edge 7, and the main cutting edge flank and the sub cutting edge flank are the same surface (side surface 5). Has been done.
A screw hole 8 is formed in the center of the upper surface 4 so as to penetrate the upper and lower surfaces and mount and fix the chip 2 on a cutter or the like.
【０００３】このようなスローアウェイチップ２を正面
フライスカッタ１の外周側先端部でシート部に取り付け
る際、カッタ本体の回転軸線Ｌに対して正の角度αをな
すように、ポジティブのアキシャルレーキ角を持たせて
位置させる。しかも、カッタ本体の半径方向の軸線Ｍに
対して負の角度βをなすように、ネガティブのラジアル
レーキ角を持たせて位置させる。このようなカッタ１で
被削材Ｗを直角削り（９０度肩壁削り）切削しようとす
る場合、図２３に示すように、スローアウェイチップ２
のカッタ外周側に位置する主切刃６で、被削材Ｗの直角
壁面をつくるよう切削し、先端側に位置する稜線外側の
副切刃７がポジのアキシャルレーキ角とネガのラジアル
レーキ角によって切込み角を付けられているので、方形
板状のチップ２で直角削りを行うことができる。When such a throw-away tip 2 is attached to the seat portion at the outer peripheral side tip portion of the front milling cutter 1, a positive axial rake angle is formed so as to make a positive angle α with respect to the rotation axis L of the cutter body. And position it. Moreover, the cutter body is positioned with a negative radial rake angle so as to form a negative angle β with respect to the radial axis M of the cutter body. When the work W is to be cut at a right angle (90 degree shoulder wall cutting) with such a cutter 1, as shown in FIG.
The main cutting edge 6 located on the outer peripheral side of the cutter cuts to form a right-angled wall surface of the work material W, and the auxiliary cutting edge 7 located on the tip side outside the ridge line is positive axial rake angle and negative radial rake angle. Since the cutting angle is provided by the, the rectangular plate-shaped tip 2 can be used for right-angle cutting.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述の
ようなスローアウェイチップ２では、アキシャルレーキ
角がポジでラジアルレーキ角がネガになるようカッタに
装着されており、しかも主切刃６と副切刃７の逃げ角が
同一面（側面５）上にあるために、主切刃６の逃げ角は
過大なポジとなる。そのため、切刃強度が小さくなって
欠損を生じ易いので、チップの寿命が短いという欠点が
あった。However, the throw-away tip 2 as described above is mounted on the cutter so that the axial rake angle is positive and the radial rake angle is negative, and moreover, the main cutting edge 6 and the sub cutting edge are provided. Since the clearance angle of the blade 7 is on the same plane (side surface 5), the clearance angle of the main cutting edge 6 is excessively positive. As a result, the strength of the cutting edge is reduced and defects are likely to occur, resulting in a short life of the chip.
【０００５】本発明は、このような実情に鑑みて、直角
削りが可能で、チップの寿命を大幅に向上できると共
に、着座の安定性を良好にしたスローアウェイチップ及
びスローアウェイ式カッタを提供することを目的とす
る。In view of such circumstances, the present invention provides a throw-away tip and a throw-away type cutter which can be cut at a right angle, can significantly improve the life of the tip, and have good seating stability. The purpose is to
【０００６】[0006]
【課題を解決するための手段】本発明によるスローアウ
ェイチップは、多角形の板状をなし、着座面と対向する
上面の稜線部が切刃をなすと共に上面がすくい面とさ
れ、着座面から上面に向けた側面が逃げ面とされている
スローアウェイチップにおいて、二つのコーナー間の稜
線部の一方のコーナー寄りに副切刃が設けられると共
に、この副切刃に対して鈍角を以て交差して他方のコー
ナーに向けて延びる主切刃が設けられ、側面には、着座
面から副切刃に交差するまで平面状に延在していてポジ
ティブな逃げ角を有する副切刃逃げ面が設けられ、主切
刃に交差する側面の上部に主切刃に沿って延在する小幅
の主切刃第１逃げ面が設けられ、この主切刃第１逃げ面
は、副切刃逃げ面の逃げ角より小さい逃げ角が設定され
ていて、主切刃の逃げ面をなす側面領域における主切刃
第１逃げ面と副切刃逃げ面との間に、主切刃第１逃げ面
より逃げ角が大きい主切刃第２逃げ面が形成されている
ことを特徴とするものである。A throw-away tip according to the present invention has a polygonal plate shape, a ridge line portion of an upper surface facing a seating surface forms a cutting edge, and an upper surface is a rake surface. In throw-away inserts whose side faces toward the upper surface are flanks, a sub-cutting edge is provided near one corner of the ridge between two corners and intersects this sub-cutting edge at an obtuse angle. A main cutting edge extending toward the other corner is provided, and a side surface is provided with a sub cutting edge flank that extends in a plane from the seating surface to intersect with the sub cutting edge and has a positive clearance angle. , A small-width main cutting edge first flank extending along the main cutting edge is provided at an upper portion of a side surface intersecting with the main cutting edge, and the main cutting edge first flank is a relief of the secondary cutting edge flank. A relief angle smaller than the corner is set to allow the relief of the main cutting edge. Characterized in that a main cutting edge second flank having a larger clearance angle than the main cutting edge first flank is formed between the main cutting edge first flank and the sub cutting edge flank in the side surface region It is what
【０００７】主切刃第１逃げ面の逃げ角は、ネガティブ
に設定されていることを特徴とする。主切刃第２逃げ面
の逃げ角は、副切刃逃げ面より逃げ角が小さく設定され
ていることを特徴とする。又、上面においてコーナーを
挟む二つの稜線部にそれぞれ設けられた主切刃は、互い
にほぼ直角になっていることを特徴とする。二つの稜線
部間のコーナーに円弧状またはチャンファのコーナー刃
が形成されていることを特徴とする。上面の稜線部に平
坦ランドが形成され、その内側にブレーカ溝が設けられ
ていることを特徴とする。平坦ランドは、副切刃及びこ
れに続くコーナーの部分でその他の部分より幅が大きく
形成されていることを特徴とする。副切刃と主切刃との
境界の稜線部に、切欠が設けられていることを特徴とす
る。切欠は、円弧形状または多角形形状に上面と側面を
切り欠いて形成されていることを特徴とする。The clearance angle of the first flank of the main cutting edge is characterized by being set negative. The relief angle of the second flank of the main cutting edge is set to be smaller than that of the flank of the secondary cutting edge. In addition, the main cutting edges respectively provided on the two ridges that sandwich the corner on the upper surface are substantially perpendicular to each other. It is characterized in that an arcuate or chamfered corner blade is formed at a corner between two ridge portions. A flat land is formed on the ridge portion of the upper surface, and a breaker groove is provided inside the flat land. The flat land is characterized in that the width of the flat cutting edge and the corners following the sub cutting edge are formed to be larger than those of the other portions. It is characterized in that a notch is provided at a ridge line portion of a boundary between the sub cutting edge and the main cutting edge. The notch is characterized in that the upper surface and the side surface are notched in an arc shape or a polygonal shape.
【０００８】本発明によるスローアウェイ式カッタは、
多角形の板状をなし、着座面と対向する上面の稜線部が
切刃をなすと共に上面がすくい面とされ、着座面から上
面に向けた側面が逃げ面とされているスローアウェイチ
ップが、アキシャルレーキ角を正の角に、ラジアルレー
キ角を負の角にして、カッタ本体に装着されたスローア
ウェイ式カッタにおいて、スローアウェイチップは、上
述したいずれかのスローアウェイチップとされ、しかも
カッタ本体の正面視において主切刃第１逃げ面は芯上が
りの位置に配置され、外周側に位置する主切刃の前端と
後端はカッタ本体の回転軸線を中心とする回転半径が同
一寸法とされていることを特徴とする。又、カッタの先
端外周側に形成されたチップ取付部の互いに交差する二
つの側面受け部に、スローアウェイチップの副切刃逃げ
面と、隣接する側面の主切刃第２逃げ面が当接されてい
ることを特徴とする。チップ取付部の径方向を向く側面
受け部に、スローアウェイチップの副切刃逃げ面が当接
され、軸線方向を向く側面受け部に、主切刃第２逃げ面
が当接されていることを特徴とする。The throw-away type cutter according to the present invention is
The throw-away tip has a polygonal plate shape, the ridge of the upper surface facing the seating surface forms a cutting edge and the upper surface is a rake surface, and the side surface from the seating surface to the upper surface is a flank. In throw-away type cutters mounted on the cutter body with the axial rake angle set to a positive angle and the radial rake angle set to a negative angle, the throw-away tip is one of the above-mentioned throw-away tips. When viewed from the front, the first flank of the main cutting edge is arranged in a position where the center is raised, and the front end and the rear end of the main cutting edge located on the outer peripheral side have the same radius of gyration about the rotation axis of the cutter body. It is characterized by In addition, the auxiliary cutting edge flank of the throw-away tip and the adjacent second flank of the main cutting edge of the adjacent side contact the two side surface receiving portions of the tip mounting portion formed on the outer peripheral side of the cutter that intersect with each other. It is characterized by being. The auxiliary cutting edge flank of the throw-away tip is in contact with the side surface receiving portion facing the radial direction of the tip mounting portion, and the main cutting edge second flank is in contact with the side surface receiving portion facing the axial direction. Is characterized by.
【０００９】[0009]
【作用】本発明によるスローアウェイチップが、ラジア
ルレーキ角がネガティブになると共に、アキシャルレー
キ角がポジティブとなるようにカッタに装着されると、
外周切刃の部分において、工具の基端側部分に位置する
副切刃の逃げ面は切削工具の回転軸線に近い側に位置す
るが、ポジティブの逃げ角を有するために切削時に被削
材壁面に当接せず、主切刃の主切刃第１逃げ面は切削工
具の回転軸線から比較的遠い位置にあるため、逃げ角を
より小さくすることができ、切刃強度が高い。又、主切
刃第１逃げ面の逃げ角がネガティブになっているので、
特に主切刃部分の切刃強度が高い。副切刃及びこれに続
くコーナーの部分で平坦ランドの幅が大きくなっている
ので、この部分の刃先強度がより高くなる。副切刃と主
切刃との間に切り欠けを設けることで、切削時に副切刃
が摩耗しても副切刃の幅が増大することを抑制でき、面
圧の増大やびびり振動の発生や主切刃の摩耗を抑制する
のに寄与する。When the throw away tip according to the present invention is attached to the cutter so that the radial rake angle becomes negative and the axial rake angle becomes positive,
At the outer peripheral cutting edge, the flank of the secondary cutting edge located on the base end side of the tool is located closer to the rotation axis of the cutting tool, but since it has a positive clearance angle, the work material wall surface during cutting Since the main cutting edge first flank of the main cutting edge is located relatively far from the axis of rotation of the cutting tool, the clearance angle can be made smaller and the cutting edge strength is high. Also, since the clearance angle of the first flank of the main cutting edge is negative,
Especially, the cutting edge strength of the main cutting edge is high. Since the width of the flat land is large in the sub-cutting edge and the corner portion following the sub-cutting edge, the edge strength of this portion becomes higher. By providing a notch between the sub cutting edge and the main cutting edge, it is possible to prevent the width of the sub cutting edge from increasing even if the sub cutting edge wears during cutting, increasing the surface pressure and generating chatter vibration. Also contributes to suppressing wear of the main cutting edge.
【００１０】本発明によるスローアウェイ式カッタで
は、直角削りができると共に、外周切刃の部分におい
て、主切刃第１逃げ面は切削工具の回転軸線から比較的
遠い位置にあるため、逃げ角を副切刃逃げ面の逃げ角よ
り小さくすることができ、切刃強度が高く、欠損を生じ
にくい。又、スローアウェイチップの１つの側面の副切
刃逃げ面とこれに隣接する側面の主切刃第２逃げ面と
が、カッタ本体のチップ取付部の二つの側面受け部に当
接して固定されているから、二つのチップ側面の異なる
位置をカッタ本体が受けることになり、それぞれチップ
側面の外周側と先端側が支持されて着座が安定し、安定
した切削が可能になる。In the throw-away type cutter according to the present invention, right-angle cutting can be performed, and at the outer peripheral cutting edge portion, the first flank face of the main cutting edge is located relatively far from the axis of rotation of the cutting tool, so that the clearance angle is reduced. It is possible to make the clearance angle smaller than the clearance angle of the auxiliary cutting edge flank, the cutting edge strength is high, and it is difficult to cause a defect. Further, the auxiliary cutting edge flank on one side of the throw-away tip and the main cutting edge second flank on the side adjacent thereto are fixed by abutting on the two side receiving portions of the tip mounting portion of the cutter body. Therefore, the cutter body receives different positions on the two chip side surfaces, the outer peripheral side and the tip side of the chip side surfaces are respectively supported, the seating is stable, and stable cutting is possible.
【００１１】[0011]
【実施例】以下、本発明の実施例を添付図面により説明
する。図１乃至図８は本発明の第一実施例を示すもので
あり、図１は本実施例による正面フライスカッタに取り
付けられるスローアウェイチップの平面図、図２は側面
図、図３は図２のＸ−Ｘ線部分断面図、図４は図１のＡ
部拡大図、図５はスローアウェイチップをカッタに装着
した状態の一部破断側面図、図６は図５の部分拡大図、
図７は図５とは別の角度からみたカッタの側面図、図８
はカッタの正面図である。図１乃至図４において、本実
施例による正面フライスカッタに装着されるスローアウ
ェイチップ１０は方形（図では略正方形）の板状をなし
ていて、着座面をなす下面１１と対向する上面１２を有
している。上面１２の略四辺をなす稜線部には主切刃１
３がそれぞれ形成され、各コーナー部には円弧状のコー
ナー刃１４が設けられている。隣接する稜線部の各主切
刃１３は互いに直交している（図４参照）。そして、各
稜線部における主切刃１３と一方のコーナー刃１４との
間には、主切刃１３に対して微少角度γ（例えば１〜５
゜）だけ上面１２上で内側に傾斜した副切刃１５が形成
され、この副切刃１５は滑らかにコーナー刃１４に接続
されるようになっている。上面１２はすくい面をなして
いて、上面１２の中央部には、下面１１まで貫通するチ
ップネジ止め用のネジ穴１６が穿設されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show a first embodiment of the present invention. FIG. 1 is a plan view of a throw-away tip attached to a front milling cutter according to this embodiment, FIG. 2 is a side view, and FIG. 3 is FIG. 4 is a partial sectional view taken along line X-X of FIG.
5 is an enlarged view of a portion, FIG. 5 is a partially cutaway side view of the cutter with a throw-away tip attached, and FIG. 6 is a partially enlarged view of FIG.
FIG. 7 is a side view of the cutter viewed from a different angle from FIG. 5, and FIG.
[Fig. 4] is a front view of the cutter. 1 to 4, a throw-away tip 10 mounted on a front milling cutter according to the present embodiment has a rectangular (substantially square in the figure) plate shape, and an upper surface 12 facing a lower surface 11 forming a seating surface is provided. Have The main cutting edge 1 is provided on the ridgeline that forms the four sides of the upper surface 12.
3 are respectively formed, and arc-shaped corner blades 14 are provided at the respective corner portions. The main cutting edges 13 of adjacent ridges are orthogonal to each other (see FIG. 4). Then, between the main cutting edge 13 and the one corner edge 14 at each ridge, a minute angle γ (for example, 1 to 5) with respect to the main cutting edge 13 is provided.
(°) is formed on the upper surface 12 so as to incline inwardly, and the auxiliary cutting edge 15 is smoothly connected to the corner blade 14. The upper surface 12 is a rake surface, and a screw hole 16 for fixing a chip screw is formed in the central portion of the upper surface 12 so as to penetrate to the lower surface 11.
【００１２】又、下面１１と上面１２との間の各側面１
８は、図２及び図３に示すように、それぞれ下面１１か
ら上面１２に向けて外側に傾斜して延びており、下面１
１から副切刃１５に至る平面領域がポジティブの逃げ角
を有する副切刃逃げ面１９をなしている。又、側面１８
の、主切刃１３と交差し且つ主切刃１３に沿って一方の
コーナー部まで延在する小幅の部分は、主切刃１３の主
切刃第１逃げ面２０とされていて、ネガティブな逃げ角
を有している。この主切刃第１逃げ面２０は平面状であ
り、そのチップ厚み方向の幅が主切刃１３と平行に所定
の長さに延在され、副切刃１５寄りの境界部分で副切刃
１５と主切刃１３との境界点Ｐに向けて斜めに切れ上が
っている。又、側面１８において、主切刃第１逃げ面２
０の下面１１側の領域では、副切刃逃げ面１９が三角形
の平面形状に切り欠かれて、主切刃第２逃げ面２２が形
成されている。この主切刃第２逃げ面２２の逃げ角は、
主切刃第１逃げ面２０の逃げ角より大きく、しかも副切
刃逃げ面１９よりも小さい、ポジティブな逃げ角とされ
ている。しかしながら、この主切刃第２逃げ面２２の逃
げ角は、主切刃第１逃げ面２０の逃げ角より大きいか、
或いは副切刃逃げ面１９よりも小さいことの少なくとも
一方を満たせばよい。尚、各側面１８のコーナー部は、
下面１１からコーナー刃１４に向けて外側に傾斜する円
筒側面形状の曲面１４ａが形成されている。Each side surface 1 between the lower surface 11 and the upper surface 12
As shown in FIG. 2 and FIG. 3, the reference numerals 8 respectively extend outward from the lower surface 11 toward the upper surface 12 while being inclined outward.
The plane area from 1 to the sub cutting edge 15 forms a sub cutting edge flank 19 having a positive clearance angle. Also, the side surface 18
The portion of the narrow width that intersects the main cutting edge 13 and extends along the main cutting edge 13 to one corner portion is the main cutting edge first flank 20 of the main cutting edge 13 and is negative. Has a clearance angle. This primary cutting edge first flank 20 has a planar shape, and its width in the chip thickness direction extends to a predetermined length in parallel with the main cutting edge 13, and the auxiliary cutting edge is located at the boundary near the secondary cutting edge 15. It cuts up diagonally toward the boundary point P between 15 and the main cutting edge 13. Also, on the side surface 18, the main cutting edge first flank 2
In the region of 0 on the lower surface 11 side, the auxiliary cutting edge flank 19 is cut out in a triangular planar shape to form a main cutting edge second flank 22. The clearance angle of the second flank 22 of the main cutting edge is
The clearance angle is positive and is larger than the clearance angle of the first cutting edge first flank 20 and smaller than the auxiliary cutting edge flank 19. However, the clearance angle of the main cutting edge second flank 22 is larger than the clearance angle of the main cutting edge first flank 20,
Alternatively, at least one of smaller than the auxiliary cutting edge flank 19 may be satisfied. In addition, the corner portion of each side surface 18,
A curved surface 14a having a cylindrical side surface that is inclined outward from the lower surface 11 toward the corner blade 14 is formed.
【００１３】このようなスローアウェイチップ１０が正
面フライスカッタ２４に装着された状態が、図５乃至図
８に示されている。このチップ１０は装着状態で、図５
及び図６に示すように、副切刃１５が先端面外側に位置
し、外周先端側に隣接する稜線部の主切刃１３はその前
端と後端が、回転軸線Ｌを中心とする回転半径が同一寸
法となるように位置する。そして、図６において、カッ
タ本体２４ａの先端外周側に形成されたチップ取付座２
５は、チップ１０の下面１１が着座する座２６と、座２
６の側壁をなす先端方向（軸線方向）を向く軸線方向側
面受け部２７と、軸線方向側面受け部２７に交差して外
周方向（径方向）を向く径方向側面受け部２８と、両側
面受け部２７，２８の間に位置するぬすみ部２６ａとを
有する凹面状に形成されている。しかも、スローアウェ
イチップ１０がチップ取付座２５に装着された状態で、
軸線方向側面受け部２７には、スローアウェイチップ１
０の主切刃第２逃げ面２２が当接し、径方向側面受け部
２８には、隣接する側面１８の副切刃逃げ面１９が当接
することで、チップ１０が位置決めされるようになって
いる。A state in which the throw-away tip 10 is mounted on the front milling cutter 24 is shown in FIGS. As shown in FIG.
As shown in FIG. 6, the auxiliary cutting edge 15 is located outside the tip surface, and the front edge and the rear edge of the main cutting edge 13 of the ridge portion adjacent to the outer peripheral tip side have a radius of gyration about the rotation axis L. Are positioned so that they have the same dimensions. Then, in FIG. 6, the tip mounting seat 2 formed on the outer peripheral side of the tip of the cutter body 24a.
5 is a seat 26 on which the lower surface 11 of the chip 10 is seated, and a seat 2
6, an axial side surface receiving portion 27 that faces the front end direction (axial direction) that forms the side wall of 6, a radial side surface receiving portion 28 that intersects the axial side surface receiving portion 27 and faces the outer peripheral direction (radial direction), and both side surface receiving surfaces. It is formed in a concave shape having a recess 26a located between the portions 27 and 28. Moreover, with the throw-away tip 10 mounted on the tip mounting seat 25,
The throw-away tip 1 is attached to the axial side surface receiving portion 27.
The primary cutting edge second flank 22 of 0 contacts the radial side surface receiving portion 28, and the secondary cutting edge flank 19 of the adjacent side surface 18 contacts the tip 10, whereby the tip 10 is positioned. There is.
【００１４】又、スローアウェイチップ１０はカッタ本
体２４ａへの装着状態で、図７に示すようにアキシャル
レーキ角がポジティブで、図８に示すようにラジアルレ
ーキ角がネガティブになるよう位置決めされている。し
かも、主切刃第１逃げ面２０は、図８に示す正面視で径
方向の軸線Ｍに対して回転方向前方（芯上がり）の位置
にある。図７に示すアキシャルレーキ角を有するチップ
１０において、カッタ２４の外周側に位置する側面１８
に関して、外周刃をなす主切刃１３は、被削材Ｗの直角
壁面を形成するべく軸線方向先端側に位置し、基端側に
切削に関与しない副切刃１５が位置することになる。し
かも、基端側の逃げ面である副切刃逃げ面１９が主切刃
第１逃げ面２０よりも軸線Ｌに近接するために、主切刃
第１逃げ面２０の逃げ角（ネガティブ）よりも大きい逃
げ角が副切刃逃げ面１９に与えられ、副切刃逃げ面１９
はそのために逃げ角がポジティブになる。しかし、主切
刃１３の領域では比較的軸線Ｌから離れるために、主切
刃第１逃げ面２０の逃げ角は副切刃逃げ面１９の逃げ角
よりも小さくてよく、本実施例ではネガティブに設定さ
れている。そのため、主切刃１３の刃先強度を大きくす
ることができることになり、特に主切刃１３は、副切刃
１５と比較してその長さが大きく且つ切削によって直角
壁面を形成するために被削材Ｗとの接触領域が大きいも
のであるため、このようなスローアウェイチップ１０の
寿命を大幅に向上できる。尚、主切刃第１逃げ面２０の
角度は、切削回転時に被削材Ｗの直角壁面に当接しない
範囲で、任意に設定できる。Further, the throw-away tip 10 is positioned so that the axial rake angle is positive as shown in FIG. 7 and the radial rake angle is negative as shown in FIG. 8 when mounted on the cutter body 24a. . Moreover, the first cutting edge first flank 20 is located forward (in the center) in the rotational direction with respect to the radial axis M in the front view shown in FIG. In the chip 10 having the axial rake angle shown in FIG. 7, the side surface 18 located on the outer peripheral side of the cutter 24.
With respect to the above, the main cutting edge 13 forming the outer peripheral edge is located on the tip end side in the axial direction so as to form the right-angled wall surface of the workpiece W, and the sub cutting edge 15 not involved in cutting is located on the base end side. Moreover, since the sub cutting edge flank 19 which is the flank on the base end side is closer to the axis L than the main cutting edge first flank 20, it is more than the clearance angle (negative) of the main cutting edge first flank 20. A larger clearance angle is given to the auxiliary cutting edge flank 19 and the auxiliary cutting edge flank 19
Therefore, the clearance angle becomes positive. However, in the region of the main cutting edge 13, the clearance angle of the main cutting edge first flank 20 may be smaller than the clearance angle of the auxiliary cutting edge flank 19 because it is relatively far from the axis L, and in this embodiment, it is negative. Is set to. Therefore, the cutting edge strength of the main cutting edge 13 can be increased, and in particular, the main cutting edge 13 has a larger length than the sub cutting edge 15 and is formed by cutting to form a right-angled wall surface. Since the contact area with the material W is large, the life of such a throw-away tip 10 can be greatly improved. The angle of the first flank 20 of the main cutting edge can be arbitrarily set within a range in which it does not come into contact with the right-angled wall surface of the workpiece W during cutting rotation.
【００１５】本実施例によるスローアウェイ式カッタに
あっては、スローアウェイチップ１０がフライスカッタ
２４のカッタ本体２４ａに装着された状態で、チップ１
０はチップ取付座２５の座２６に下面１１が載置され、
基端側を向く側面１８の主切刃第２逃げ面２２が軸線方
向側面受け部２７に当接し、カッタ本体２４ａの中央側
を向く側面１８の副切刃逃げ面１９が径方向側面受け部
２８に当接することで位置決めされている。そして、ネ
ジ等でチップ１０がカッタ本体２４ａに固定される。従
って、このようなスローアウェイ式カッタ２４で被削材
Ｗの直角削りを行うと、チップ取付座２５の二つの側面
受け部２７，２８でスローアウェイチップ１０の隣接す
る二つの側面の外周側部分と先端側部分とが支持されて
いるから、特に切削時におけるチップの着座の安定性が
良い。In the throw-away type cutter according to this embodiment, the throw-away tip 10 is mounted on the cutter body 24a of the milling cutter 24, and the tip 1
0 is the lower surface 11 placed on the seat 26 of the chip mounting seat 25,
The main cutting edge second flank 22 of the side surface 18 facing the base end side is in contact with the axial side surface receiving portion 27, and the auxiliary cutting edge flank surface 19 of the side surface 18 of the side surface 18 facing the central side of the cutter body 24a is the radial side surface receiving portion. It is positioned by abutting 28. Then, the chip 10 is fixed to the cutter body 24a with screws or the like. Therefore, when the work material W is cut at a right angle with such a throw-away cutter 24, the two side surface receiving portions 27 and 28 of the tip mounting seat 25 allow the outer peripheral side portions of the two adjacent side surfaces of the throw-away tip 10. Since the tip end portion is supported, the stability of seating of the tip is particularly good during cutting.
【００１６】以上のように、本実施例によれば、スロー
アウェイチップ１０の主切刃１３に沿って延在する主切
刃第１逃げ面２０の逃げ角がネガティブに設定されてい
るから、直角削り能力に影響を与えることなく、特に主
切刃部分の刃先強度を大きくすることができて、チップ
寿命を大幅に向上させることができる。しかも、スロー
アウェイチップ１０の隣接する二つの側面１８のうち、
一方では外周側に位置する主切刃第２逃げ面２２がカッ
タ本体２４ａの軸線方向側面受け部２７で支持され、他
方では先端側の副切刃逃げ面１９が径方向側面受け部２
８で支持されるから、切削時の着座安定性が良い。尚、
上述の説明では、主切刃第１逃げ面２０の逃げ角をネガ
ティブに設定したが、これに限定されることなく、副切
刃逃げ面１９や主切刃第２逃げ面２２の逃げ角よりも小
さいポジティブの逃げ角に設定するようにしてもよい。As described above, according to this embodiment, the clearance angle of the main cutting edge first flank 20 extending along the main cutting edge 13 of the throw-away tip 10 is set to be negative. The edge strength of the main cutting edge portion can be particularly increased without affecting the right-angle cutting ability, and the life of the tip can be significantly improved. Moreover, of the two adjacent side surfaces 18 of the throw-away tip 10,
On the one hand, the main cutting edge second flank 22 located on the outer peripheral side is supported by the axial side surface receiving portion 27 of the cutter body 24a, and on the other hand, the sub cutting edge flank surface 19 on the tip side is located on the radial side receiving portion 2.
Since it is supported by 8, the seating stability during cutting is good. still,
In the above description, the clearance angle of the main cutting edge first flank 20 is set to a negative value, but the clearance angle is not limited to this, and is larger than the clearance angles of the sub cutting edge flank surface 19 and the main cutting edge second flank surface 22. May be set to a small positive clearance angle.
【００１７】次に、本発明の第二実施例を図９乃至図１
２により説明する。図９は第二実施例によるカッタに装
着されるスローアウェイチップの平面図、図１０は図９
のＹ−Ｙ線断面図、図１１は図９のＢ部拡大図、図１２
は図１０のＣ部拡大図である。本実施例においては、上
面１２の切刃をなす稜線に平坦ランド３０が全周に亘っ
て設けられている。そして、上面１２の中央領域には、
下面１１と平行で切刃部分より下面１１までの距離が小
さい底面３１が設けられ、底面３１とランド３０との間
には、ランド３０から底面３１に至る平面状の傾斜面３
２が設けられていることで、ブレーカ溝３３が形成され
ている。従って、本実施例によれば、ブレーカ溝３３と
ランド３０を設けることで、切屑の排出がより良好にな
ると共に、主切刃１３、副切刃１５及びコーナー刃１４
が強化されて、刃先強度とチップ寿命が向上する。Next, a second embodiment of the present invention will be described with reference to FIGS.
2 will be described. FIG. 9 is a plan view of the throw-away tip mounted on the cutter according to the second embodiment, and FIG. 10 is FIG.
YY line sectional view of FIG. 11, FIG. 11 is an enlarged view of part B of FIG. 9, FIG.
FIG. 11 is an enlarged view of part C of FIG. 10. In this embodiment, a flat land 30 is provided on the ridgeline forming the cutting edge of the upper surface 12 over the entire circumference. Then, in the central region of the upper surface 12,
A bottom surface 31 that is parallel to the bottom surface 11 and has a smaller distance from the cutting edge portion to the bottom surface 11 is provided, and a flat inclined surface 3 extending from the land 30 to the bottom surface 3 is provided between the bottom surface 31 and the land 30.
The breaker groove 33 is formed by providing the breaker groove 33. Therefore, according to the present embodiment, by providing the breaker groove 33 and the land 30, the chips are discharged more favorably, and the main cutting edge 13, the sub cutting edge 15 and the corner blade 14 are provided.
Is improved to improve the cutting edge strength and the life of the tip.
【００１８】図１３乃至図１６は本発明の第三実施例を
示すものであり、図１３は本実施例によるスローアウェ
イチップの平面図、図１４は側面図、図１５は図１３の
Ｄ部拡大図、図１６は図１５に示す部分の被削材切削状
態を示す図である。図１３乃至図１５に示すスローアウ
ェイチップ３５において、スローアウェイチップ３５の
上面１２のコーナー部付近の稜線部で、副切刃１５の一
端は境界点Ｐ１において、コーナー刃１４と接続されて
おり、他端は境界点Ｐで終了している。そして、境界点
Ｐとこれに続く主切刃１３との間には、切り欠け３６が
形成されている。この切り欠け３６は、平面視で主切刃
１３側よりも副切刃１５側で傾斜がなだらかになるよう
形成され（図１５参照）、しかも側面１８の下面１１方
向に延在して下面１１まで到達して切り欠かれている
（下面１１に到達せずに途中で途切れていてもよい）。
尚、切り欠け３６の稜線方向の幅は適宜の長さに設定す
ればよいが、好ましくは副切刃１５と同等かそれより小
さく設定すればよい。13 to 16 show a third embodiment of the present invention. FIG. 13 is a plan view of a throw-away tip according to this embodiment, FIG. 14 is a side view, and FIG. 15 is a portion D of FIG. FIG. 16 is an enlarged view, and FIG. 16 is a view showing a cutting state of the work material in the portion shown in FIG. In the throw-away tip 35 shown in FIG. 13 to FIG. 15, one end of the auxiliary cutting edge 15 is connected to the corner blade 14 at the boundary point P1 at the ridge line portion near the corner portion of the upper surface 12 of the throw-away tip 35, The other end ends at the boundary point P. A notch 36 is formed between the boundary point P and the main cutting edge 13 following the boundary point P. This notch 36 is formed so that the inclination is gentler on the side of the auxiliary cutting edge 15 than on the side of the main cutting edge 13 in plan view (see FIG. 15), and further extends in the direction of the lower surface 11 of the side surface 18 to extend to the lower surface 11. It reaches to and is cut out (it may be interrupted on the way without reaching the lower surface 11).
The width of the notch 36 in the ridge direction may be set to an appropriate length, but is preferably set to be equal to or smaller than the sub cutting edge 15.
【００１９】ところで、従来のスローアウェイチップが
装着された正面フライスカッタ等においては、切削時に
副切刃によって直角削りの切込みが行われ、副切刃が摩
耗すると、これに接続されている主切刃の方向に副切刃
の幅が広がってしまい、その分だけ切削時の面圧が大き
くなるために、びびり振動を起こしたり、主切刃の摩耗
を起こす等して、チップ寿命が短くなる欠点があった。
その点、本第三実施例では、上述のような構成を採用す
ることにより、図１６に示すように、正面フライスカッ
タに装着されて切削状態におかれた場合、Ｐ１−Ｐ間で
被削材Ｗに当接する副切刃１５によって切込みが行われ
て、副切刃１５が摩耗したとしても、主切刃１３との間
に切り欠け３６が存在するために、副切刃１５の幅の広
がりを抑制できることになる。そのため、切削時に副切
刃１５が摩耗しても面圧が増大するのを抑え、びびり振
動の発生や主切刃の摩耗を抑制でき、この点においても
チップ寿命の向上に寄与することになる。By the way, in a conventional face milling cutter or the like equipped with a throw-away tip, a sub-cutting edge makes a right-angle cutting cut during cutting, and when the sub-cutting edge is worn, the main cutting edge connected to this is cut. The width of the sub cutting edge widens in the direction of the blade, and the surface pressure during cutting increases by that much, causing chatter vibration and wear of the main cutting edge, which shortens the chip life. There was a flaw.
On the other hand, in the third embodiment, by adopting the above-mentioned configuration, as shown in FIG. 16, when mounted on the front milling cutter and placed in a cutting state, the workpiece is cut between P1 and P. Even if the sub-cutting edge 15 that abuts the material W makes a cut and the sub-cutting edge 15 is worn, the width of the sub-cutting edge 15 is reduced due to the presence of the notch 36 between the sub-cutting edge 15 and the main cutting edge 13. The spread can be suppressed. Therefore, even if the auxiliary cutting edge 15 is worn during cutting, it is possible to prevent the surface pressure from increasing, and it is possible to suppress chatter vibration and wear of the main cutting edge, which also contributes to the improvement of the chip life. .
【００２０】図１７及び図１８は、本発明の第四実施例
を示すものである。本実施例においては、第二実施例と
同様に、上面１２の稜線部に全周に亘って平坦ランド３
０が形成されている。副切刃１５の境界点Ｐと主切刃１
３との境界において、このランド２５を上面中央方向に
切り欠いて切り欠け３７が形成され、しかも、この切り
欠け３７は側面１８を上面１２から下面１１まで切り欠
いて形成されている。本実施例では、切り欠け３７は上
面中央部方向にランド３０の幅より小さい深さだけ切り
欠かれて形成されている。そのため、切り欠け３７部分
の切刃もランド３０で強化されることになる。17 and 18 show a fourth embodiment of the present invention. In the present embodiment, as in the second embodiment, the flat land 3 is formed on the ridge of the upper surface 12 over the entire circumference.
0 is formed. Boundary point P of sub cutting edge 15 and main cutting edge 1
At the boundary with 3, the land 25 is cut out toward the center of the upper surface to form a notch 37, and the notch 37 is formed by notching the side surface 18 from the upper surface 12 to the lower surface 11. In the present embodiment, the notch 37 is formed by notching in the central portion of the upper surface by a depth smaller than the width of the land 30. Therefore, the cutting edge of the notch 37 portion is also strengthened by the land 30.
【００２１】図１９及び図２０は、第三実施例による切
り欠け３６の変形例であり、図１９に示す切り欠け３８
は水平断面で台形に切り欠かれている。図２０に示す切
り欠け３９は水平断面で円弧状に切り欠かれて形成され
ている。尚、切り欠けの形状は、これらのものに限定さ
れることなく、他の適宜の多角形や曲線形状を採用でき
る。図２１は、本発明によるスローアウェイチップの第
五実施例を示すものであり、本実施例では、平坦ランド
３０は副切刃１５及びコーナー刃１４の領域で、他の領
域よりも幅の広い幅広ランド部３０ａとされている。こ
れによって、特に切込みに用いられる副切刃１５及びコ
ーナー刃１４の領域の切刃強度が一層高くなる利点があ
る。19 and 20 show a modification of the notch 36 according to the third embodiment, which is a notch 38 shown in FIG.
Has a trapezoidal cutout in horizontal section. The cutout 39 shown in FIG. 20 is formed by cutting out in an arc shape in a horizontal cross section. The shape of the notch is not limited to these, and other suitable polygonal shapes or curved shapes can be adopted. FIG. 21 shows a fifth embodiment of the throw-away tip according to the present invention. In this embodiment, the flat land 30 is wider in the area of the auxiliary cutting edge 15 and the corner edge 14 than in other areas. It is a wide land portion 30a. This has the advantage that the cutting edge strength in the region of the auxiliary cutting edge 15 and the corner edge 14 used for cutting is further increased.
【００２２】又、図１９及び図２０で示す切り欠け３
８，３９やその他の切り欠けは、第四、第五実施例に示
す平坦ランド３０を有するスローアウェイチップに設け
られてもよいことはいうまでもない。又、上述の各実施
例において、コーナー刃１４は平面視で円弧状に形成す
るようにしたが、チャンファに形成してもよい。Further, the notch 3 shown in FIGS. 19 and 20.
It goes without saying that 8, 39 and other notches may be provided in the throw-away tip having the flat land 30 shown in the fourth and fifth embodiments. Further, in each of the above embodiments, the corner blade 14 is formed in an arc shape in a plan view, but it may be formed in a chamfer.
【００２３】[0023]
【発明の効果】本発明に係るスローアウェイチップは、
二つのコーナー間の稜線部の一方のコーナー寄りに副切
刃が設けられると共に、副切刃に対して鈍角を以て交差
して主切刃が設けられ、側面には、着座面から副切刃ま
で延在していてポジティブな逃げ角を有する副切刃逃げ
面が設けられ、主切刃に交差する側面の上部に副切刃逃
げ面の逃げ角より小さい逃げ角が設定された主切刃第１
逃げ面が設けられ、主切刃の逃げ面における主切刃第１
逃げ面と副切刃逃げ面との間に、主切刃第１逃げ面より
逃げ角が大きい主切刃第２逃げ面が形成されているか
ら、直角削りができると共に、特に主切刃部分の刃先強
度を大きくすることができて、チップ寿命を大幅に向上
させることができる。又、スローアウェイチップの主切
刃第１逃げ面の逃げ角はネガティブに設定されているか
ら、直角削り用のスローアウェイチップの刃先強度をよ
り大きくすることができて、チップ寿命が大幅に向上す
る。又、スローアウェイチップの上面の稜線部内側にブ
レーカ溝が設けられているから、切屑の排出性が一層向
上する。又、スローアウェイチップの副切刃と主切刃と
の境界に切欠が設けられているから、切削時に切込み用
の副切刃が摩耗しても副切刃の幅が増大するのを抑制で
きて、面圧が増大するのを抑えて、びびり振動の発生や
主切刃の摩耗を抑制できる。この点からもチップ寿命の
向上に寄与することになる。又、本発明に係るスローア
ウェイ式カッタは、スローアウェイチップが、請求項１
乃至９のいずれかに記載のスローアウェイチップとさ
れ、しかもカッタ本体の正面視において主切刃第１逃げ
面は芯上がりの位置に配置され、外周側に位置する主切
刃は前端と後端がカッタ本体の回転軸線を中心とする回
転半径を同一寸法とされているから、直角削りができる
と共に、特に主切刃部分の刃先強度を大きくすることが
できて、チップ寿命を大幅に向上させることができる。
又、カッタの先端外周側に形成されたチップ取付部の互
いに交差する二つの側面受け部に、スローアウェイチッ
プの副切刃逃げ面と、隣接する側面の主切刃第２逃げ面
が当接されているから、切削時のスローアウェイチップ
の着座安定性が良い。The throw-away tip according to the present invention is
A sub-cutting edge is provided near one corner of the ridgeline between the two corners, and a main cutting edge is provided intersecting the sub-cutting edge at an obtuse angle, and on the side surface, from the seating surface to the sub-cutting edge. A secondary cutting edge flank that extends and has a positive clearance angle is provided, and a primary cutting edge with a clearance angle smaller than the clearance angle of the secondary cutting edge flank is set at the upper part of the side surface that intersects the main cutting edge. 1
A flank is provided, and the main cutting edge on the flank of the main cutting edge is the first
Since the main cutting edge second flank having a larger clearance angle than the main cutting edge first flank is formed between the flank surface and the sub cutting edge flank surface, it is possible to perform right-angle cutting and particularly the main cutting edge portion. The cutting edge strength can be increased, and the life of the tip can be significantly improved. In addition, the clearance angle of the first flank of the main cutting edge of the throw-away tip is set to a negative value, so the cutting edge strength of the throw-away tip for right-angle cutting can be increased and the life of the tip is greatly improved. To do. Further, since the breaker groove is provided inside the ridge line on the upper surface of the throw-away tip, the chip discharging property is further improved. Further, since the notch is provided at the boundary between the auxiliary cutting edge of the throw-away tip and the main cutting edge, it is possible to suppress the width of the auxiliary cutting edge from increasing even if the auxiliary cutting edge for cutting is worn during cutting. As a result, it is possible to suppress an increase in surface pressure and suppress chatter vibration and wear of the main cutting edge. This point also contributes to the improvement of the chip life. In addition, the throw-away type cutter according to the present invention comprises a throw-away tip.
The throw-away tip according to any one of 1 to 9, wherein the main cutting edge first flank is disposed at a center-up position in a front view of the cutter body, and the main cutting edge located on the outer peripheral side has a front end and a rear end. Have the same radius of gyration about the axis of rotation of the cutter body, so that it is possible to cut at a right angle, and in particular, it is possible to increase the edge strength of the main cutting edge portion, greatly improving the life of the tip. be able to.
In addition, the auxiliary cutting edge flank of the throw-away tip and the adjacent second flank of the main cutting edge of the adjacent side contact the two side surface receiving portions of the tip mounting portion formed on the outer peripheral side of the cutter that intersect with each other. Therefore, the throw-away tip has good seating stability during cutting.
【図１】本発明の第一実施例によるスローアウェイチッ
プの平面図である。FIG. 1 is a plan view of a throw-away tip according to a first embodiment of the present invention.
【図２】第１図に示すスローアウェイチップの側面図で
ある。FIG. 2 is a side view of the throw-away tip shown in FIG.
【図３】図２のＸ−Ｘ線部分断面図である。FIG. 3 is a partial sectional view taken along line XX of FIG.
【図４】図１のＡ部拡大図である。FIG. 4 is an enlarged view of part A in FIG.
【図５】第一実施例による正面フライスカッタの一部破
断側面である。FIG. 5 is a partially broken side view of a front milling cutter according to the first embodiment.
【図６】図５のスローアウェイチップ部分の拡大図であ
る。FIG. 6 is an enlarged view of the throw-away tip portion of FIG.
【図７】図５と別の角度からみたカッタの側面図であ
る。FIG. 7 is a side view of the cutter viewed from another angle from FIG.
【図８】図７に示すカッタの正面図である。8 is a front view of the cutter shown in FIG. 7. FIG.
【図９】本発明の第二実施例によるスローアウェイチッ
プの平面図である。FIG. 9 is a plan view of a throw-away tip according to a second embodiment of the present invention.
【図１０】図９のＹ−Ｙ線断面図である。10 is a cross-sectional view taken along the line YY of FIG.
【図１１】図９のＢ部拡大図である。FIG. 11 is an enlarged view of part B in FIG.
【図１２】図１０のＣ部拡大図である。12 is an enlarged view of a C portion of FIG.
【図１３】本発明の第三実施例によるスローアウェイチ
ップの平面図である。FIG. 13 is a plan view of a throw-away tip according to a third embodiment of the present invention.
【図１４】図１３に示すスローアウェイチップの側面図
である。FIG. 14 is a side view of the throw-away tip shown in FIG.
【図１５】図１３のＤ部拡大図である。FIG. 15 is an enlarged view of part D in FIG.
【図１６】スローアウェイチップの副切刃による被削材
切削状態を示す部分拡大図である。FIG. 16 is a partially enlarged view showing a work material cutting state by the auxiliary cutting edge of the throw-away tip.
【図１７】本発明の第四実施例によるスローアウェイチ
ップの平面図である。FIG. 17 is a plan view of a throw-away tip according to a fourth embodiment of the present invention.
【図１８】図１７のＥ部拡大図である。FIG. 18 is an enlarged view of part E in FIG.
【図１９】切り欠けの変形例を示す図１５と同様な図で
ある。FIG. 19 is a view similar to FIG. 15 showing a modification of the notch.
【図２０】切り欠けの別の変形例を示す図１５と同様な
図である。FIG. 20 is a view similar to FIG. 15 showing another modification of the notch.
【図２１】本発明の第五実施例によるスローアウェイチ
ップの要部平面図である。FIG. 21 is a plan view of a main portion of a throw-away tip according to a fifth embodiment of the present invention.
【図２２】従来のスローアウェイチップの斜視図であ
る。FIG. 22 is a perspective view of a conventional throw-away tip.
【図２３】従来のスローアウェイチップが装着されたカ
ッタによる直角削り状態を示す断面図である。FIG. 23 is a cross-sectional view showing a state in which a conventional throw-away tip is mounted on the cutter at a right angle.
１０，３５…スローアウェイチップ、１１…下面、１２
…上面、１３…主切刃、１４…副切刃、１８…側面、１
９…副切刃逃げ面、２０…主切刃第１逃げ面、２２…主
切刃第２逃げ面、２４…フライスカッタ、２５…チップ
取付座、２７…軸線方向受け面、２８…径方向受け面、
３０…平坦ランド、３０ａ…幅広ランド部、３３…ブレ
ーカ溝、３６，３７，３８，３９…切り欠け。10, 35 ... Throwaway tip, 11 ... Bottom surface, 12
... Top surface, 13 ... Main cutting edge, 14 ... Sub cutting edge, 18 ... Side surface, 1
9 ... Secondary cutting edge flank, 20 ... Main cutting edge first flank, 22 ... Main cutting edge second flank, 24 ... Milling cutter, 25 ... Tip mounting seat, 27 ... Axial direction receiving surface, 28 ... Radial direction Receiving surface,
30 ... Flat land, 30a ... Wide land part, 33 ... Breaker groove, 36, 37, 38, 39 ... Notch.
Claims (12)
上面の稜線部が切刃をなすと共に上面がすくい面とさ
れ、着座面から上面に向けた側面が逃げ面とされている
スローアウェイチップにおいて、 二つのコーナー間の前記稜線部の一方のコーナー寄りに
副切刃が設けられると共に、該副切刃に対して鈍角を以
て交差して他方のコーナーに向けて延びる主切刃が設け
られ、 前記側面には、着座面から副切刃に交差するまで平面状
に延在していてポジティブな逃げ角を有する副切刃逃げ
面が設けられ、 前記主切刃に交差する前記側面の上部に主切刃に沿って
延在する小幅の主切刃第１逃げ面が設けられ、この主切
刃第１逃げ面は、前記副切刃逃げ面の逃げ角より小さい
逃げ角が設定されていて、 前記主切刃の逃げ面をなす側面領域における前記主切刃
第１逃げ面と副切刃逃げ面との間に、主切刃第１逃げ面
より逃げ角が大きい主切刃第２逃げ面が形成されている
ことを特徴とするスローアウェイチップ。1. A polygonal plate shape, a ridge line portion of an upper surface facing a seating surface forms a cutting edge, the upper surface is a rake surface, and a side surface from the seating surface to the upper surface is a flank surface. In the throw-away tip, a sub cutting edge is provided near one corner of the ridge line portion between two corners, and a main cutting edge that intersects the sub cutting edge at an obtuse angle and extends toward the other corner. Provided, the side surface is provided with a secondary cutting edge flank having a positive clearance angle extending in a plane from the seating surface to intersect with the secondary cutting edge, and the side surface intersecting the main cutting edge Is provided with a small-width main cutting edge first flank extending along the main cutting edge, and the main cutting edge first flank has a clearance angle smaller than that of the sub-cutting blade flank. And in the side surface area that forms the flank of the main cutting edge A throw-away tip characterized in that a main cutting edge second flank having a larger clearance angle than the main cutting edge first flank is formed between the main cutting edge first flank and the sub cutting edge flank. .
ィブに設定されていることを特徴とする請求項１に記載
のスローアウェイチップ。2. The throw-away tip according to claim 1, wherein the clearance angle of the first flank of the main cutting edge is set to be negative.
逃げ面より逃げ角が小さく設定されていることを特徴と
する請求項１または２に記載のスローアウェイチップ。3. The throw-away tip according to claim 1, wherein the clearance angle of the second flank of the main cutting edge is set to be smaller than that of the flank of the auxiliary cutting edge.
記稜線部にそれぞれ設けられた前記主切刃は、互いにほ
ぼ直角になっていることを特徴とする請求項１乃至３の
いずれかに記載のスローアウェイチップ。4. The main cutting edge provided on each of the two ridge line portions sandwiching a corner on the upper surface is substantially orthogonal to each other, according to claim 1. Throw-away tip.
状またはチャンファのコーナー刃が形成されていること
を特徴とする請求項１乃至４のいずれかに記載のスロー
アウェイチップ。5. The throw-away tip according to claim 1, wherein an arc-shaped or chamfered corner blade is formed at the corner between the two ridge portions.
れ、その内側にブレーカ溝が設けられていることを特徴
とする請求項１乃至５のいずれかに記載のスローアウェ
イチップ。6. The throw-away tip according to claim 1, wherein a flat land is formed on the ridge portion of the upper surface, and a breaker groove is provided inside the flat land.
コーナーの部分でその他の部分より幅が大きく形成され
ていることを特徴とする請求項１乃至６のいずれかに記
載のスローアウェイチップ。7. The throw away according to any one of claims 1 to 6, wherein the flat land is formed such that a width of the sub cutting edge and a corner portion following the sub cutting edge is larger than that of other portions. Chips.
切欠が設けられていることを特徴とする請求項１乃至７
のいずれかに記載のスローアウェイチップ。8. A ridge line part of a boundary between the auxiliary cutting edge and the main cutting edge,
A cutout is provided, and the cutout is provided.
Throw-away tip described in any of.
上面と側面を切り欠いて形成されていることを特徴とす
る請求項８に記載のスローアウェイチップ。9. The throw-away tip according to claim 8, wherein the notch is formed by notching an upper surface and a side surface in an arc shape or a polygonal shape.
る上面の稜線部が切刃をなすと共に上面がすくい面とさ
れ、着座面から上面に向けた側面が逃げ面とされている
スローアウェイチップが、アキシャルレーキ角を正の角
に、ラジアルレーキ角を負の角にして、カッタ本体に装
着されたスローアウェイ式カッタにおいて、 前記スローアウェイチップは、請求項１乃至９のいずれ
かに記載のスローアウェイチップとされ、しかもカッタ
本体の正面視において前記主切刃第１逃げ面は芯上がり
の位置に配置され、外周側に位置する前記主切刃の前端
と後端はカッタ本体の回転軸線を中心とする回転半径が
同一寸法とされていることを特徴とするスローアウェイ
式カッタ。10. A polygonal plate shape, a ridge line portion of the upper surface facing the seating surface forms a cutting edge, the upper surface is a rake surface, and a side surface from the seating surface to the upper surface is a flank surface. The throw-away tip is a throw-away type cutter attached to the cutter body with the axial rake angle being a positive angle and the radial rake angle being a negative angle, wherein the throw-away tip is any one of claims 1 to 9. In the front view of the cutter body, the first flank face of the main cutting edge is disposed at a center-up position, and the front end and the rear end of the main cutting edge located on the outer peripheral side are the cutter body. The throw-away type cutter has the same radius of gyration about the axis of rotation.
ップ取付部の互いに交差する二つの側面受け部に、前記
スローアウェイチップの前記副切刃逃げ面と、隣接する
側面の前記主切刃第２逃げ面が当接されていることを特
徴とする請求項１０に記載のスローアウェイ式カッタ。11. The auxiliary cutting edge flank of the throw-away tip and the main cutting edge of the side adjacent to the two side surface receiving portions of the tip mounting portion formed on the outer peripheral side of the tip of the cutter, which intersect with each other. The throw-away cutter according to claim 10, wherein the second flank is in contact.
け部に、スローアウェイチップの前記副切刃逃げ面が当
接され、軸線方向を向く側面受け部に、前記主切刃第２
逃げ面が当接されていることを特徴とする請求項１１に
記載のスローアウェイ式カッタ。12. The secondary cutting edge flank of the throw-away tip is brought into contact with the side surface receiving portion of the tip mounting portion facing in the radial direction, and the main cutting edge second is attached to the side surface receiving portion facing in the axial direction.
The throw-away cutter according to claim 11, wherein the flanks are in contact with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03063794A JP3185518B2 (en) | 1994-02-28 | 1994-02-28 | Indexable inserts and cutters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03063794A JP3185518B2 (en) | 1994-02-28 | 1994-02-28 | Indexable inserts and cutters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07237026A true JPH07237026A (en) | 1995-09-12 |
| JP3185518B2 JP3185518B2 (en) | 2001-07-11 |
Family
ID=12309359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03063794A Expired - Lifetime JP3185518B2 (en) | 1994-02-28 | 1994-02-28 | Indexable inserts and cutters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3185518B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000308908A (en) * | 1999-04-27 | 2000-11-07 | Toshiba Tungaloy Co Ltd | Cutting tool |
| JP2006224278A (en) * | 2005-02-21 | 2006-08-31 | Mitsubishi Materials Corp | Insert for milling cutter |
| JP2006239830A (en) * | 2005-03-04 | 2006-09-14 | Mitsubishi Materials Corp | Insert connecting and disconnecting type end mill and insert |
| WO2008136426A1 (en) * | 2007-04-26 | 2008-11-13 | Kyocera Corporation | Cutting insert, cutting tool, and cutting method using the same |
| JP2010076088A (en) * | 2008-09-01 | 2010-04-08 | Mitsubishi Materials Corp | Cutting tool |
| US20140126970A1 (en) * | 2011-11-25 | 2014-05-08 | Sumitomo Electric Hardmetal Corp. | Indexable cutting insert for milling |
| EP2431115A4 (en) * | 2009-06-16 | 2016-09-07 | Tungaloy Corp | Cutting insert and indexable face milling cutter |
| JP2020531295A (en) * | 2017-09-06 | 2020-11-05 | 京セラ株式会社 | Manufacturing method for cutting inserts, cutting tools and cutting products |
-
1994
- 1994-02-28 JP JP03063794A patent/JP3185518B2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4540764B2 (en) * | 1999-04-27 | 2010-09-08 | 株式会社タンガロイ | Cutting tools |
| JP2000308908A (en) * | 1999-04-27 | 2000-11-07 | Toshiba Tungaloy Co Ltd | Cutting tool |
| JP2006224278A (en) * | 2005-02-21 | 2006-08-31 | Mitsubishi Materials Corp | Insert for milling cutter |
| JP2006239830A (en) * | 2005-03-04 | 2006-09-14 | Mitsubishi Materials Corp | Insert connecting and disconnecting type end mill and insert |
| WO2008136426A1 (en) * | 2007-04-26 | 2008-11-13 | Kyocera Corporation | Cutting insert, cutting tool, and cutting method using the same |
| JPWO2008136426A1 (en) * | 2007-04-26 | 2010-07-29 | 京セラ株式会社 | Cutting insert, cutting tool, and cutting method using the same |
| JP5016671B2 (en) * | 2007-04-26 | 2012-09-05 | 京セラ株式会社 | Cutting insert, cutting tool, and cutting method using the same |
| US8740510B2 (en) | 2007-04-26 | 2014-06-03 | Kyocera Corporation | Cutting insert and cutting tool, and cutting method using the same |
| JP2010076088A (en) * | 2008-09-01 | 2010-04-08 | Mitsubishi Materials Corp | Cutting tool |
| EP2431115A4 (en) * | 2009-06-16 | 2016-09-07 | Tungaloy Corp | Cutting insert and indexable face milling cutter |
| US20140126970A1 (en) * | 2011-11-25 | 2014-05-08 | Sumitomo Electric Hardmetal Corp. | Indexable cutting insert for milling |
| US9333566B2 (en) * | 2011-11-25 | 2016-05-10 | Sumitomo Electric Hardmetal Corp. | Indexable cutting insert for milling |
| JP2020531295A (en) * | 2017-09-06 | 2020-11-05 | 京セラ株式会社 | Manufacturing method for cutting inserts, cutting tools and cutting products |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3185518B2 (en) | 2001-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3166022B2 (en) | Indexable insert and method of manufacturing the same | |
| RU2404025C2 (en) | Cutter plate | |
| US5460464A (en) | Cutting insert | |
| WO2014148515A1 (en) | Cutting insert, and cutting tool with replaceable cutting edge | |
| WO2010147065A1 (en) | Cutting insert and indexable face milling cutter | |
| JP3196566B2 (en) | Indexable inserts and indexable cutters | |
| JP3269245B2 (en) | Indexable inserts and cutting tools | |
| JP3185519B2 (en) | Indexable inserts and cutting tools | |
| JP3329159B2 (en) | Indexable inserts and indexable milling tools | |
| JP3180604B2 (en) | Indexable inserts and indexable cutters | |
| JPH09174323A (en) | Throw-away tip and throw-away type cutter | |
| JPH07237026A (en) | Throwaway tip and cutter | |
| JPH11347826A (en) | Throwaway tip | |
| JPH10138033A (en) | Throw away tip | |
| JP2002046002A (en) | Throwaway tip | |
| JP3314512B2 (en) | Indexable tip | |
| JPH0871834A (en) | Throw away tip | |
| JP2003019617A (en) | Insert for cutting tool, and cutting tool | |
| JP3185556B2 (en) | Indexable tip | |
| JPH0857709A (en) | Throw-away tip | |
| JPH0691421A (en) | Throwaway tip | |
| JPH0839306A (en) | Throwaway tip | |
| JPH067856Y2 (en) | Throw-away tip | |
| JPH05309514A (en) | Throw away tip | |
| JP2567787Y2 (en) | Throw-away tips |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20010403 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080511 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080511 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090511 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100511 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100511 Year of fee payment: 9 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100511 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100511 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110511 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110511 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120511 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120511 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130511 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130511 Year of fee payment: 12 |
|
| EXPY | Cancellation because of completion of term |