JPS5830091B2 - Throw-away end mill for finishing - Google Patents
Throw-away end mill for finishingInfo
- Publication number
- JPS5830091B2 JPS5830091B2 JP53014617A JP1461778A JPS5830091B2 JP S5830091 B2 JPS5830091 B2 JP S5830091B2 JP 53014617 A JP53014617 A JP 53014617A JP 1461778 A JP1461778 A JP 1461778A JP S5830091 B2 JPS5830091 B2 JP S5830091B2
- Authority
- JP
- Japan
- Prior art keywords
- mounting seat
- rake
- tip
- chip mounting
- chip
- 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.)
- Expired
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- Milling Processes (AREA)
Description
【発明の詳細な説明】
本発明は工具本体のヘッド部外周面に２つの特殊なスロ
ーアウェイチップを装着した比較的小径の仕上用スロー
アウェイエンド□ルに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relatively small-diameter finishing indexable end tool having two special indexable tips mounted on the outer peripheral surface of the head portion of a tool body.
一般にエンドミルにはその構成上、全体が１本の素材か
らなる一体形、着脱自在の切刃ブレードを有するブレー
ド形、スローアウェイチップを使用するスローアウェイ
形等があり、使用目的、用途等に応じ種々の形式のエン
ドミルおよび切刃材質が選択使用されている。In general, end mills come in various configurations, such as an integral type made entirely of one piece of material, a blade type with a removable cutting blade, and an indexable type with a throw-away tip, depending on the purpose and application. Various types of end mills and cutting edge materials are selected for use.
一方被削材は近年とみに高級化、難削化しておりこれに
対応して工具の切刃材質も超硬合金、セラミック、サー
メット等が多用されるようになっている。On the other hand, workpiece materials have become more sophisticated and difficult to cut in recent years, and in response to this, materials such as cemented carbide, ceramics, and cermets are increasingly being used as cutting edge materials for tools.
しかし、工具本体全体をかような材質で形成することは
価格的にも又、工具の機械強度の点でも問題があり、切
刃部のみに前述せる材質が採用されているのが現状であ
る。However, forming the entire tool body from such a material poses problems in terms of cost and mechanical strength of the tool, and currently the above-mentioned materials are used only for the cutting edge. .
さらにユーザーサイドでは加工能率の向上、工具費の削
減、工具の取替段取りが容易であること等の要求が強く
、これらの要求を満足するスローアウェイ形の工具が多
用されるに至っている。Furthermore, there are strong demands from users for improved machining efficiency, reduced tool costs, and ease of tool replacement setup, and indexable tools that meet these demands have come into widespread use.
而して、この種スローアウェイ形の工具は特にエンドミ
ル等の比較的小径の切削工具にあっては、スローアウェ
イチップを配置して固定するチップ取付座のスペースが
十分ないため、その加工が極めて困難で又、加工精度が
出ないためチップの位置精度即ち切削工具の精度が十分
でない。This type of indexable tool, especially for relatively small-diameter cutting tools such as end mills, is extremely difficult to machine because there is not enough space for the insert mounting seat to place and fix the indexable insert. It is difficult and the machining accuracy is not high enough, so the positional accuracy of the chip, that is, the accuracy of the cutting tool is not sufficient.
さらにチップ取付座を削設することによる断面積の減少
に伴う剛性の低下を生じる等の欠点を有する。Furthermore, there are other drawbacks, such as a reduction in rigidity due to a reduction in cross-sectional area due to the cutting of the chip mounting seat.
本発明は前述せる問題点に鑑み、剛性が大きく容易に高
度なチップの位置精度が得られる比較的小径の仕上用ス
ローアウェイエンドミルを提供スることを目的としてお
り、その特徴とするところは、柄部２と同一軸心で連設
された円柱状ヘッド３の外周面の対向する位置に前方に
向って中心軸方向にわずかに傾斜する一対の平面部４を
形成し、該平面部と残存する周面とがなすコーナ部の一
対の対角位置コーナ部に、前記平面部に直角に接続する
中央部にチップ取付用ネジ孔９を有するチップ取付座面
６と該取付座面に直角でかつ前記平面部と平行な側壁７
とから構成されるチップ取付座８を設けてなる工具本体
１の前記チップ取付座に、幅寸法が長さ寸法より小さく
・長方形をなす一対の平行なすくい面とこれらす（い面
に直角に接続している側面逃げ面を形成する一対の平行
な面とを有し、該側面逃げ面の幅Ｈが前記すくい面の幅
Ｂより大きい基本形状が平板状直方体であって、前記側
面逃げ面の中心部に貫通孔２６を有するとともに、少く
とも一方の前記すくい面をその中央部に該すくい面の短
辺稜線２３と同一高さの平面部２４を残す他、該平面部
の両側に位置するすくい面を短辺方向に湾曲しかつ前記
中央平面部に向ってチップの中心方向に傾斜した凸曲面
２１に形成し、その結果得られる短辺曲率稜線２７を切
刃稜とし、さらに前記すくい面のコーナ部に前記側面逃
げ而の幅Ｈ方向に沿った面取り２５を施してなるスロー
アウェイチップ２０を、その一方の側面逃げ面が前記チ
ップ取付座の取付座面に、一方のすくい面がチップ取付
座の側壁に当接するよう着脱自在にかつ軸方向への円柱
状ヘッドがらのチップ突出量を偏心ピン１３により微調
整可能に取付けたことを特徴とする仕上用スローアウェ
イエンドミルである。In view of the above-mentioned problems, the present invention aims to provide a relatively small-diameter finishing indexable end mill that has large rigidity and can easily obtain a high degree of tip positioning accuracy.The present invention is characterized by: A pair of flat parts 4 that are slightly inclined toward the front in the direction of the central axis are formed at opposing positions on the outer peripheral surface of the cylindrical head 3 that is connected coaxially with the handle part 2, and the flat parts 4 and the remaining A chip mounting seat surface 6 having a chip mounting screw hole 9 in the center part connected at right angles to the flat surface and a chip mounting seat surface 6 having a chip mounting screw hole 9 at the center part connected at right angles to the flat surface at a pair of diagonal positions formed by the circumferential surface. and a side wall 7 parallel to the plane part
The tool body 1 is provided with a chip mounting seat 8 consisting of a pair of parallel rake faces having a rectangular shape and a width smaller than the length. a pair of parallel surfaces forming connected side flank surfaces, the basic shape of which is a width H of the side flank flanks that is larger than the width B of the rake face is a flat rectangular parallelepiped; has a through hole 26 in the center of at least one of the rake faces, leaves a flat part 24 at the center of at least one of the rake faces at the same height as the short side ridgeline 23 of the rake face, and also has a flat part 24 located on both sides of the flat part. The rake face to be cut is formed into a convex curved surface 21 that is curved in the short side direction and inclined toward the center of the chip toward the central plane, and the resulting short side curvature ridge line 27 is defined as a cutting edge ridge, and the rake An indexable tip 20 having a corner portion of the surface chamfered 25 along the width H direction of the side relief, one side relief surface thereof is the mounting seat surface of the tip mounting seat, and one rake surface is the This indexable finishing end mill is characterized in that it is detachably attached so as to come into contact with the side wall of the tip mounting seat, and the amount of tip protrusion of the cylindrical head in the axial direction can be finely adjusted using an eccentric pin 13.
以下本発明を図示の実施例にもとづき詳細に説明する。The present invention will be explained in detail below based on illustrated embodiments.
第１図は本発明になる仕上用スローアウェイエンド□ル
の斜視図、第２図ａは工具本体の左側面図、同図すは工
具本体の正面図である。FIG. 1 is a perspective view of the finishing indexable end according to the present invention, FIG. 2a is a left side view of the tool body, and FIG. 2 is a front view of the tool body.
図において、１は工具本体、２は柄部、３はヘッド部で
あり、該ヘッド部３は円柱状素材から、その外周面の対
向する位置に前方に向って中心軸方向にわずかに傾斜す
る一対の平面部４ａ、４ｂが削成され、該平面部４ａ
、４ｂと残存する周面５ａ 、５ｂとがなすコーナ部の
一対の対角位置コーナ部に、前記平面部４ ａ ５４
ｂにそれぞれ直角に接続するチップ取付座面６ａ ｔ
６ｂが削成され、さらに該チップ取付座面６ａ＋６ｂに
直角でかつ前記平面部４ ａ 、４ ｂに平行な側壁７
ａ、７ｂが削成され、さらに前記チップ取付座面６ａ、
６ｂと前記側壁７ ａ ｔ ７ ｂとのなすコーナ部に
はヌスミが設けられており、前述せるチップ取付座面６
ａ、６ｂと側壁７ ａ 、７ ｂによりチップ取付座８
ａ、８ｂが構成されている。In the figure, 1 is a tool body, 2 is a handle part, and 3 is a head part, and the head part 3 is made of a cylindrical material and is slightly inclined forward in the central axis direction at opposing positions on its outer peripheral surface. A pair of plane parts 4a and 4b are cut, and the plane part 4a
, 4b and the remaining circumferential surfaces 5a, 5b.
Chip mounting seats 6a and t connected at right angles to b.
6b is cut, and a side wall 7 that is perpendicular to the chip mounting seat surface 6a+6b and parallel to the flat parts 4a and 4b.
a, 7b are cut, and the chip mounting seat surface 6a,
A slot is provided at the corner formed by the side wall 6b and the side wall 7a t7b, and the chip mounting seat surface 6 mentioned above is provided with a groove.
A, 6b and side walls 7a, 7b make the chip mounting seat 8
a and 8b are configured.
尚、前述せるチップ取付座面にはスローアウェイチップ
を固着するため所要位置にネジ孔９ ａ 、９ ｂ、そ
のチップのヘッド部３からの突出量を微調整し支承する
ための偏心ピン１３を挿入するピン孔１０ａ、１０ｂが
それぞれ穿設されている。In addition, the aforementioned tip mounting seat has screw holes 9a and 9b at required positions for fixing the indexable tip, and an eccentric pin 13 for finely adjusting and supporting the amount of protrusion of the tip from the head section 3. Pin holes 10a and 10b for insertion are provided respectively.
前記チップ取付座８の側壁７はチップ１１を取付げた際
、そのチップ１１の切刃底面１４に逃げ角αがつくよう
にこれと同一角度αの傾斜をつげて削成されている。The side wall 7 of the tip mounting seat 8 is cut with an inclination of the same angle α so that a relief angle α is formed on the bottom surface 14 of the cutting edge of the tip 11 when the tip 11 is attached.
尚、前記側壁７の壁面と前記平面部４の面を平行にする
ことにより、工具本体の加工精度が容易に得ることがで
きる。Note that by making the wall surface of the side wall 7 and the surface of the flat portion 4 parallel, machining accuracy of the tool body can be easily obtained.
又、前述せる平面部４は従来のこの種切削工具における
チップルームに相当する部分になるが、それを制限する
壁がなく、その結果非常に大きなチップルームを形成し
ていることになる。Further, the above-mentioned flat portion 4 corresponds to a chip room in a conventional cutting tool of this type, but there is no wall to limit it, and as a result, a very large chip room is formed.
さらに、チップ１１の取付状態も幅Ｂの小さな面をすく
い面として取付している為、ヘッド部３のチップ取付座
８の占有部分が小さくてすみ比較的小径のものが得られ
るばかりか、バックメタルを大きくとることができ剛性
が大幅に向上する。Furthermore, since the tip 11 is attached with the surface with the small width B as the rake surface, the area occupied by the tip attachment seat 8 of the head section 3 is small, and not only a relatively small diameter can be obtained, but also The metal can be made larger and the rigidity is greatly improved.
前述せる構成の工具本体１のチップ取付座８にそれぞれ
チップ１１を装着して切削工具として使用可能になった
状態が第１図である。FIG. 1 shows a state in which the tips 11 are respectively attached to the tip mounting seats 8 of the tool body 1 having the above-mentioned structure, and the tool body 1 can be used as a cutting tool.
ところで、この時間順になるのがチップ１１の取付状態
である。Incidentally, the state in which the chips 11 are attached is in this chronological order.
すなわち、チップ取付座８ａ＋８ｂに単にチップ１１ａ
、１１ｂを固着するだけでは、２枚のチップ１１ａｔｌ
ｌｂの先端位置にズレεを生じ、これが切削工具として
の切刃のフレ量となり、被加工物を加工した時、その仕
上面精度に大きな影響をおよぼすため、通常このフレ量
εは仕上加工用としては５μ以下におさえるよう要求さ
れる。That is, the chip 11a is simply mounted on the chip mounting seat 8a+8b.
, 11b, the two chips 11atl
A deviation ε occurs in the tip position of the lb, and this becomes the amount of deflection of the cutting edge as a cutting tool, and when machining a workpiece, it has a great effect on the finished surface accuracy. Therefore, it is required to keep it below 5μ.
このフレが生じる原因は種々あり、例えばチップ取付座
８の精度、チップ１１の精度があげられるが、チップ１
１の精度は多量のチップを同時に加工生産することによ
り均一な精度で互換性のあるものが得られるが、工具本
体１のチップ取付座８は、その座面６、側壁７を完全な
精度に加工できたとしてもチップ１１固定用のネジ孔９
の加工精度は如何ともしがたい。There are various causes for this runout, such as the accuracy of the tip mounting seat 8 and the accuracy of the tip 11, but the
The accuracy of No. 1 can be obtained by processing and producing a large number of chips at the same time with uniform accuracy and compatibility, but the chip mounting seat 8 of the tool body 1 has its seating surface 6 and side wall 7 perfectly accurate. Even if it can be machined, the screw hole 9 for fixing the chip 11
The machining accuracy is indescribable.
つまり、ネジ孔９はタップによる加工しかできず、その
加工精度にはおのずと限界があり、通常チップ１１を取
付けた状態でそのフレ量を５μ以下におさえるのは極め
て困難である。In other words, the screw hole 9 can only be machined by tapping, and there is a natural limit to the machining accuracy, and it is usually extremely difficult to suppress the amount of deflection to less than 5 μm with the chip 11 attached.
このフレを容易に解消する役割をはたすのが第３図に示
す偏心ピン１３であり、ピン孔１０に嵌挿する軸部１５
、該軸部１５の軸心Ｌ１と偏心せる軸心Ｌ２を有する頭
部１６とからなり、該頭部１６にはネジ孔１７が穿設さ
れている。The eccentric pin 13 shown in FIG.
, a head 16 having an axis L2 that is offset from the axis L1 of the shaft portion 15, and a screw hole 17 is bored in the head 16.
前記ネジ孔１７は偏心ピン１３を回動させる場合、その
ネジ孔１７に螺合するボルトを螺着して回動せしめる。When the eccentric pin 13 is rotated, a bolt is screwed into the screw hole 17 to rotate the eccentric pin 13.
又、偏心ピン１３を抜きとる場合にも同様に利用される
。It is also used in the same way when removing the eccentric pin 13.
次にいかにフレな解消せしめるかを順を追って説明する
と、まず一方のチップ１１ａおよび偏心ピン１３ａを固
着した後、他方のチップ１１ｂを固着するに際し、ポル
）１２ｂで軽く仮固着し、ダイヤルゲージで両チップ１
１ａ、１１ｂの相対フレ量εをチェックし、そのフレ量
εに対応するチップ１１ｂの必要移動量を求めて、その
必要移動量だけ偏心ピン１３ｂを回転することによりチ
ップ１１ｂを移動せしめて相対フレ量がゼロとなる。Next, to explain step by step how to eliminate the deflection, first fix one chip 11a and the eccentric pin 13a, then when fixing the other chip 11b, temporarily fix it lightly with the pole 12b, and then use the dial gauge to fix the other chip 11b. both chips 1
Check the relative deflection amount ε of the tips 1a and 11b, find the required amount of movement of the tip 11b corresponding to the amount of deflection ε, and rotate the eccentric pin 13b by the required amount of movement to move the tip 11b and achieve the relative deflection. quantity becomes zero.
この状態で、まず偏心ピン１３ｂを不動状態に固定した
後、該偏心ピン１３ｂの頭部１６外周面１７にチップｌ
ｌｂを完全に当接して前記ボルト１２ｂを強固にしめつ
げて本固着する。In this state, first, the eccentric pin 13b is fixed in an immovable state, and then the chip l is attached to the outer peripheral surface 17 of the head 16 of the eccentric pin 13b.
lb completely abuts and firmly tightens the bolt 12b to secure it completely.
尚、説明上チップ１１を２個取付けた状態を使用状態と
説明したが、場合によっては一方のチップのみを取付け
た状態で使用しても伺ら問題ないことは勿論である。Incidentally, for the purpose of explanation, the state in which two chips 11 are attached is described as the operating state, but it goes without saying that depending on the situation, there is no problem in using the state in which only one chip is attached.
次に前記チップ取付座に装着される仕上用スローアウェ
イチップについて第４図にもとづいて詳細に説明する。Next, the finishing indexable tip mounted on the tip mounting seat will be explained in detail based on FIG. 4.
図において、チップ２０は基本形状が平板状長方体で、
すくい面２１０幅Ｂは側面逃げ面２２０幅Ｈより小さく
構成されており、前記すくい面２１はその中央部に該す
くい面２１の短辺稜線２３と同一高さの平面部２４を残
すように前記す（い面を短辺方向に湾曲しかつ前記中央
平面部２４に向ってチップの中心方向に傾斜した凸曲面
に削成されており、その凸曲面をなすすくい面２１のコ
ーナ部には前記側面逃げ面２２０幅方向に沿った面取２
５が施され、又、前記側面逃げ而２２には工具本体１に
取付けるための貫通孔２６が設けられている。In the figure, the chip 20 has a basic shape of a flat rectangular parallelepiped.
The width B of the rake face 210 is configured to be smaller than the width H of the side flank face 220, and the rake face 21 is shaped in the front so as to leave a flat part 24 at the same height as the short side ridgeline 23 of the rake face 21 in the center thereof. (The rake surface is curved in the short side direction and is cut into a convex curved surface that is inclined toward the center of the chip toward the central plane portion 24, and the corner portion of the rake face 21 forming the convex curved surface has the Side flank face 220 Chamfering along the width direction 2
5 is provided, and the side relief 22 is provided with a through hole 26 for attachment to the tool body 1.
このチップ２０における切刃稜はすくい面２１のエッチ
である短辺曲率稜線２７であり、１個のチップ２０に４
ケ所の切刃稜があり、チップ２０を回転、反転すること
により４回使用できる。The cutting edge of this chip 20 is a short side curvature ridge line 27 which is an etch of the rake face 21, and one chip 20 has four edges.
There are several cutting edges, and the tip 20 can be used four times by rotating and reversing it.
ところで、すくい面を凸曲面に形成することはすでに公
知の技術で、この凸曲面による効果は言うまでもないが
、切削時のビビリ振動が抑制され切削抵抗が減少すると
ともに切屑の流出がスムースで、極めて良好な仕上精度
が得られることも公知である。By the way, forming the rake face into a convex curved surface is already a well-known technique, and the effects of this convex curved surface go without saying, but it suppresses chatter vibration during cutting, reduces cutting resistance, and allows chips to flow out smoothly. It is also known that good finishing accuracy can be obtained.
しかしながら、従来この種スローアウェイチップに採用
されている凸曲面はいずれもすくい面金面を一面とする
すくい面長辺稜線方向に湾曲する凸曲面すくい面であり
、従って、その切刃稜はすくい面長辺稜線であるため、
工具本体を小さく構成することができず、加えて、カッ
タ径が小さい場合、１つのスローアウェイチップにおけ
る切刃の外周側切刃と内周側切刃との切削速度差が大き
く、目的とする均一で良好な仕上面精度が得られない。However, all of the convex curved surfaces conventionally adopted in this type of indexable insert are convex curved rake surfaces that are curved in the direction of the long side ridge line of the rake face with the rake face metal surface as one surface, and therefore, the cutting edge ridge is Since it is a long side edge of the surface,
If the tool body cannot be made small and the cutter diameter is small, the difference in cutting speed between the outer cutting edge and the inner cutting edge of one indexable insert is large, making it difficult to achieve the desired goal. Uniform and good finished surface accuracy cannot be obtained.
この傾向はカッタ径が小さくなればなる程に顕著となる
。This tendency becomes more pronounced as the cutter diameter becomes smaller.
従って、本願発明の如き比較的小径のエンドミルには全
く使用できず、特公昭５２−３５１６０号のごとき、大
径の所謂フェイスミルでの採用しかできなかったもので
ある。Therefore, it cannot be used at all in relatively small-diameter end mills such as the present invention, and can only be used in large-diameter so-called face mills such as those disclosed in Japanese Patent Publication No. 52-35160.
本発明に係るスローアウェイチップ２０は中央部に平面
部２４を残し、かつ、すくい面短辺稜線方向に湾曲する
凸曲面に形成することにより切刃稜を非常に短くでき、
１つのチップにおける内外周切刃の切削速度差をなくす
ことができ、前述した工具本体構造と相俟って、コンパ
クトでかつ剛性の大きい比較的小径の仕上用スローアウ
ェイエンドミルを提供することができる。The indexable tip 20 according to the present invention leaves a flat portion 24 in the center and is formed into a convex curved surface that curves in the direction of the short edge of the rake surface, so that the cutting edge can be made very short.
It is possible to eliminate the difference in cutting speed between the inner and outer peripheral cutting edges of one tip, and in combination with the tool body structure described above, it is possible to provide a relatively small-diameter finishing indexable end mill that is compact and has high rigidity. .
更に、従来では・・イス等の一体形の仕上用エンドミル
しか使用できなかった汎用小型フライス盤においても、
充分に使用できる仕上用スローアウェイエンドミルを提
供することができる。Furthermore, in the past, only general-purpose small milling machines could be used with integrated finishing end mills such as chairs, etc.
It is possible to provide a finishing indexable end mill that can be used satisfactorily.
又、前記スローアウェイチップの凸曲面の加工も短辺稜
線方向に湾曲するようにしているため前後に障害物がな
く極めて容易に加工できるものである。Further, since the convex curved surface of the indexable tip is curved in the direction of the short side ridge line, there are no obstacles in the front or rear, and the process can be performed extremely easily.
これを従来の如きすくい面長辺稜線方向に湾曲する凸曲
面に加工しようとした時には、中央平面部２４が障害と
なり、その加工は極めて困難なものになってしまう。When attempting to process this into a convex curved surface that curves in the direction of the long edge of the rake face as in the conventional case, the central plane portion 24 becomes an obstacle, making the process extremely difficult.
さらに、本発明のチップ２０にあってはすくい語中央部
に平面部２４を設けているため、工具本体にチップ２０
を取付げた時、チップ取付座面と前記平面部２４とが面
接触をするため、チップ取付精度が極めて容易に保証す
ることができる。Furthermore, since the tip 20 of the present invention has a flat portion 24 at the center of the rake, the tip 20 is attached to the tool body.
When the chip mounting seat is mounted, the chip mounting seat surface and the flat portion 24 come into surface contact, so that chip mounting accuracy can be guaranteed very easily.
以上詳述したように本発明によれば、仕上精度のすぐれ
た切削性能を有する剛性の大きな比較的小径のスローア
ウェイエンドミルを提供することができる。As described in detail above, according to the present invention, it is possible to provide a relatively small diameter indexable end mill with high rigidity and cutting performance with excellent finishing accuracy.
第１図は本発明になる仕上用スローアウェイエンドミル
の斜視図、第２図ａは工具本体左側面図、同すは工具本
体正面図、第３図は偏心ピンの説明図、第４図は本発明
に係るスローアウェイチップの斜視図である。
１：工具本体、２：柄部、３：ヘッド部、４：平面部、
６：チップ取付座面、１：側壁、８：チップ取付座、９
：ネジ孔、１０：ピン孔、１１：チップ、１３：偏心ピ
ン、２０：仕上用スローアウェイチップ、２１：すくい
面、２２：側面逃げ面、２４：すくい面子面部、２５：
面取部、２６：貫通孔。Fig. 1 is a perspective view of the finishing indexable end mill according to the present invention, Fig. 2a is a left side view of the tool body, and the same is a front view of the tool body, Fig. 3 is an explanatory diagram of the eccentric pin, and Fig. 4 is FIG. 1 is a perspective view of a throw-away tip according to the present invention. 1: Tool body, 2: Handle, 3: Head, 4: Plane part,
6: Chip mounting seat, 1: Side wall, 8: Chip mounting seat, 9
: Screw hole, 10: Pin hole, 11: Tip, 13: Eccentric pin, 20: Throw-away tip for finishing, 21: Rake face, 22: Side flank face, 24: Rake face face part, 25:
Chamfered portion, 26: Through hole.
Claims (1)
周面の対向する位置に前方に向って中心軸方向にわずか
に傾斜する一対の平面部４を形成し、該平面部と残存す
る周面とがなすコーナ部の一対の対角位置コーナ部に、
前記平面部に直角に接続する中央部にチップ取付用ネジ
孔９を有するチップ取付座面６と該取付座面に直角でか
つ前記平面部と平行な側壁７とから構成されるチップ取
付座８を設けてなる工具本体１の前記チップ取付座に、
幅寸法が長さ寸法より小さい長方形をなす一対の平行な
すくい面とこれらすくい面に直角に接続している側面逃
げ面を形成する一対の平行な面とを有し、該側面逃げ面
の幅Ｈが前記すくい面の幅Ｂより大きい基本形状が平板
状直方体であって、前記側面逃げ面の中心部に貫通孔２
６を有するとともに、少くとも一方の前記すくい面をそ
の中央部に該す（い面の短辺稜線２３と同一高さの平面
部２４を残す他、該平面部の両側に位置するすくい面を
短辺方向に湾曲しかつ前記中央平面部に向ってチップの
中心方向に傾斜した凸曲面２１に形成し、その結果得ら
れる短辺曲率稜線２７を切刃稜とし、さらに前記すくい
面のコーナ部に前記側面逃げ面の幅■方向に沿った面取
り２５を施してなるスローアウェイチップ２０を、その
一方の側面逃げ面が前記チップ取付座の取付座面に、一
方のすくい面がチップ取付座の側壁に当接するよう着脱
自在にかつ軸方向への円柱状ヘッドからのチップ突出量
を偏心ピン１３により微調整可能に取付けたことを特徴
とする仕上用スローアウェイエンド□ル。1 A pair of flat parts 4 that are slightly inclined toward the front in the direction of the central axis are formed at opposing positions on the outer peripheral surface of the cylindrical head 3 that is coaxially connected with the handle part 2, and the flat parts 4 and A pair of diagonal position corners formed by the remaining peripheral surface,
A chip mounting seat 8 consisting of a chip mounting seat 6 having a chip mounting screw hole 9 in the center connected at right angles to the plane part, and a side wall 7 perpendicular to the mounting seat and parallel to the plane part. The tip mounting seat of the tool body 1 is provided with a
It has a pair of parallel rake faces forming a rectangle whose width dimension is smaller than the length dimension, and a pair of parallel surfaces forming side flank faces connected at right angles to these rake faces, and the width of the side flank flank faces. The basic shape is a flat rectangular parallelepiped in which H is larger than the width B of the rake face, and a through hole 2 is provided in the center of the side flank face.
6, and at least one of the rake faces is placed in the center of the rake face (in addition to leaving a flat part 24 at the same height as the short side ridge line 23 of the rake face, the rake faces located on both sides of the flat part are It is formed into a convex curved surface 21 that is curved in the short side direction and inclined toward the center of the chip toward the central plane part, and the resulting short side curvature ridge line 27 is the cutting edge ridge, and furthermore, the corner part of the rake face is A throw-away tip 20 is provided with a chamfer 25 along the width direction of the side flank face, one of the side flank faces is on the mounting seat surface of the chip mounting seat, and one rake face is on the mounting seat of the chip mounting seat. A finishing throw-away end □ that is detachably attached so as to come into contact with a side wall, and the amount of tip protrusion from a cylindrical head in the axial direction can be finely adjusted using an eccentric pin 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53014617A JPS5830091B2 (en) | 1978-02-09 | 1978-02-09 | Throw-away end mill for finishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53014617A JPS5830091B2 (en) | 1978-02-09 | 1978-02-09 | Throw-away end mill for finishing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54106986A JPS54106986A (en) | 1979-08-22 |
| JPS5830091B2 true JPS5830091B2 (en) | 1983-06-27 |
Family
ID=11866153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53014617A Expired JPS5830091B2 (en) | 1978-02-09 | 1978-02-09 | Throw-away end mill for finishing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830091B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085078A1 (en) * | 2010-01-07 | 2011-07-14 | Gkn Sinter Metals, Llc | Machining tool and method for manufacturing same |
| EP2722122B1 (en) * | 2011-06-17 | 2020-10-14 | Tungaloy Corporation | Cutting insert and rotary cutting tool |
| US9421615B2 (en) * | 2014-04-10 | 2016-08-23 | Iscar, Ltd. | Cutting tool and cutting insert having exactly four cutting portions therefor |
-
1978
- 1978-02-09 JP JP53014617A patent/JPS5830091B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54106986A (en) | 1979-08-22 |
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