JP2000071110A - Throwaway tip - Google Patents

Throwaway tip

Info

Publication number
JP2000071110A
JP2000071110A JP10259262A JP25926298A JP2000071110A JP 2000071110 A JP2000071110 A JP 2000071110A JP 10259262 A JP10259262 A JP 10259262A JP 25926298 A JP25926298 A JP 25926298A JP 2000071110 A JP2000071110 A JP 2000071110A
Authority
JP
Japan
Prior art keywords
nose
tip
flat surface
cutting edge
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.)
Pending
Application number
JP10259262A
Other languages
Japanese (ja)
Inventor
Tatsuji Kinukawa
達治 絹川
Takashi Inayama
孝 稲山
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug 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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP10259262A priority Critical patent/JP2000071110A/en
Publication of JP2000071110A publication Critical patent/JP2000071110A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To make it practical of a tip used for machining shafts of small articles to be given super-precision machining in a wide cutting range to easily obtain center height and to perform high dimensional precision machining. SOLUTION: A positive type tip having a nose radius R1 not more than 0.5 mm, a cutting edge 3 gradually being in a low position as it separates from the nose 2, and equipped with a breaker groove 4 along the cutting edge 3 without providing with a land has the region, which is to the nose tip 2a side among the faces 6 and composing a circular arc cutting edge 7, as a flat surface 11 parallel to the bottom of the tip. When the nose tip 2a is to be brought to the center height of a work, it is easy to get the center height because they are brought together on the flat surface 11. The circular arc cutting edge 7 being located on the outer fringe of the flat surface 11 makes an accurate circular arc on a single plane, therefore machining precision does not go wrong.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、スローアウェイチ
ップに関し、詳しくは、自動旋盤(数値制御旋盤)など
にて小型の部品(軸部品)を超精密旋削加工するのに使
用されるポジタイプのスローアウェイチップ(以下、単
にチップともいう)に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away insert, and more particularly, to a positive-type throw used for ultra-precision turning of small parts (shaft parts) in an automatic lathe (numerical control lathe) or the like. It relates to an away chip (hereinafter, also simply referred to as a chip).

【0002】[0002]

【従来の技術】コンピューターのCDロムドライブ部
品、光学部品、或いはVTRなどの回転軸に使用される
小径の軸部品の加工においては、細長い丸棒(棒材)か
ら同部品を次々と削り出して製造するのが普通である。
このような棒材加工では1度の旋削で所定の軸形状に仕
上げるため、例えば0.1mmといった小さい切込みか
ら5mmといった大きい切込みまでの広範囲の切込みに
対しても低切削抵抗で高精度に加工でき、しかも切り屑
(分断)処理に問題のないチップを用いることが要請さ
れる。そこで、このようなチップには、加工精度確保の
点からノーズの円弧状切刃やこれに連なる直線状切刃、
つまり平面視(すくい面側から見て)、辺に沿う切刃
(以下、直線状切刃という)の稜線がシャープなものが
用いられる。
2. Description of the Related Art In the processing of small-diameter shaft parts used for a rotary shaft such as a CD ROM drive part of a computer, an optical part, or a VTR, the parts are cut out one after another from an elongated round bar. It is usually manufactured.
In such bar processing, a single turning is used to finish the shaft shape. For example, a wide range of cuts from a small depth of 0.1 mm to a large depth of 5 mm can be processed with low cutting resistance and high precision. In addition, it is required to use a chip having no problem in chip (cutting) processing. Therefore, such a tip has an arc-shaped cutting edge of a nose or a linear cutting edge connected to the cutting edge in order to secure processing accuracy.
That is, a sharp cutting edge (hereinafter, referred to as a straight cutting edge) along a side is used in plan view (as viewed from the rake face side).

【0003】図10は、この種の加工に用いられるチッ
プ101の一例である。このチップ101は、全体が略
菱形の平板状に形成されたポジ(ポジティブ)タイプの
もので、左右のノーズ102のノーズ半径(ノーズの平
面視半径)は通常0.5mm以下のものとされ、にげ面
105には例えば7度の逃げ角θがつけられている。そ
して、図11に示したように、逃げ面105側からみる
と、直線状切刃110はノーズ先端102aから離れる
にしたがって低位を成すように形成され、ノーズ102
の円弧状切刃116や直線状切刃(稜線)110にはラ
ンドを備えることなくブレーカ溝118を備え(図1
2,13参照)、すくい面119の中央寄り部位は円弧
状切刃116の先端つまりノーズ先端102aの高さと
同じか、これより高位にある中央平坦部120、及びこ
れからノーズ先端102aに向かって延びる半島状平坦
部121を備えている。
FIG. 10 shows an example of a chip 101 used for this type of processing. The tip 101 is of a positive (positive) type formed entirely in a substantially rhombic flat plate shape, and the nose radius of the left and right nose 102 (the radius of the nose in plan view) is usually 0.5 mm or less. The relief surface 105 has a clearance angle θ of, for example, 7 degrees. Then, as shown in FIG. 11, when viewed from the flank 105 side, the linear cutting blade 110 is formed so as to become lower as it moves away from the nose tip 102a.
The arc-shaped cutting edge 116 and the linear cutting edge (ridge line) 110 are provided with a breaker groove 118 without a land (FIG. 1).
2, 13), the central portion of the rake face 119 extends toward the tip of the arc-shaped cutting edge 116, that is, the central flat portion 120 located at or higher than the height of the nose tip 102a, and extends therefrom toward the nose tip 102a. A peninsular flat portion 121 is provided.

【0004】ところで、丸棒素材(ワーク)から、所定
の断面形状をなす小径の軸部品を超精密仕上げする加工
においては、ワークの芯(回転中心)高さに、チップの
ノーズ先端の高さを正確に合わせることが極めて重要に
なる。このような芯高さは、従来、図12に示したよう
に、ワークWの最下端面(点)に、ホルダーにクランプ
されたチップ101のノーズ先端(頂点)102aを慎
重に当接(接触)させ、その高さとワークWの直径から
芯の高さを算出するのが普通である。
In the process of ultra-precise finishing of a small-diameter shaft part having a predetermined sectional shape from a round bar material (work), the height of the tip (nose) of the tip is set at the height of the core (rotation center) of the work. It is extremely important that they be exactly matched. Conventionally, as shown in FIG. 12, the nose tip (apex) 102a of the tip 101 clamped by the holder is carefully brought into contact with the lower end surface (point) of the work W as shown in FIG. In general, the height of the core is calculated from the height and the diameter of the work W.

【0005】また、小径の軸部品の超精密仕上げにおい
ては、チップの位置を常に振れ止め(ブッシュ)の近傍
に保持し、刃物(バイト)の横方向の送りに代え、回転
するワークを加工に応じて軸線方向に繰り出しながら径
に応じて刃物に縦方向の切込を与えて所定の径やテーパ
に旋削し、最後に突っ切り、この工程を次々と繰り返す
ことで同一部品を仕上げるという手法がとられている。
そして、このような加工法では、ノーズ先端の基準位置
を決め、ワークの設計に応じて切込量(チップの刃先位
置)をコンピュータ制御することで加工される。しかし
て、図14に示したように、チップ101のノーズ先端
102aの基準位置の設定においては、例えばチップ1
01のノーズ102がワークWの回転軸Jに平行な線の
接点Skと、同回転軸Jに垂直な線の接点Stとを基準
にされる。
In ultra-precision finishing of small-diameter shaft parts, the position of the tip is always held near the steady rest (bush), and the rotating workpiece is processed instead of the lateral feed of the cutting tool (bite). In accordance with the diameter, while cutting out the blade in the longitudinal direction according to the diameter, turning it to a predetermined diameter or taper, cutting off at the end, and repeating this process one after another to finish the same part. Have been.
In such a processing method, the reference position of the tip of the nose is determined, and processing is performed by computer-controlling the cutting amount (the cutting edge position of the tip) according to the design of the work. Thus, as shown in FIG. 14, in setting the reference position of the nose tip 102a of the tip 101, for example, the tip 1
The nose 102 of 01 is based on a contact point Sk of a line parallel to the rotation axis J of the workpiece W and a contact point St of a line perpendicular to the rotation axis J.

【0006】[0006]

【発明が解決しようとする課題】前記従来のチップ10
1によって、このようなワークの芯高さの割出しやノー
ズの基準位置の設定を行う場合には次のような問題があ
った。すなわち、前記のチップ101においてノーズ先
端102aのすくい面側は図12に示されるように点又
は微小な線であり、平坦面部のない極めてシャープな形
状をしている。したがって、ワークの芯高さを出すに当
ってノーズ先端102aをワークWの最下端部に当接さ
せる際には、同先端102aが微小ながらその表面に食
い込むことがあり、その食込み分の狂いがでるといった
ことがあった。
The above conventional chip 10
According to No. 1, there are the following problems when indexing the work center height and setting the reference position of the nose. That is, the rake face side of the nose tip 102a of the chip 101 is a point or a minute line as shown in FIG. 12, and has an extremely sharp shape without a flat surface portion. Therefore, when the nose tip 102a is brought into contact with the lowermost end of the work W in obtaining the core height of the work, the tip 102a may bite into the surface of the work W, albeit small, and the deviation of the bite may be disturbed. There was something out.

【0007】しかも、ノーズ先端102aが点又は微小
な線であるために、基準位置が確認しにくく、芯高さ精
度の低下を招きやすい。さらに、このようにノーズ10
2がシャープであることから、ワークの最下端部に当接
させる際にはノーズのチッピングを招きやすいといった
問題もあった。
Further, since the nose tip 102a is a point or a minute line, it is difficult to confirm the reference position, and the accuracy of the core height is likely to be reduced. In addition, the nose 10
Since 2 is sharp, there is also a problem that tipping of the nose is likely to occur when abutting the lowermost end of the work.

【0008】また、このようなチップは、軸部品の設計
(例えば異径部の隅角アール)に応じたノーズ半径を持
つものが使用される。すなわちワークの異径部の隅角
(肉)アール(R)が設計値で0.2mmであれば、ノ
ーズ半径R0.2mm以下のチップが使用される。一
方、チップの基準位置の設定に当たっては、前記したよ
うにノーズ先端102aにおいてワークWの軸線Jに沿
う方向とそれに垂直の方向の2つの線に接する点が基準
とされる。
Further, such a chip having a nose radius according to the design of the shaft component (for example, a corner radius of a different diameter portion) is used. That is, if the corner (wall) radius (R) of the different diameter portion of the work is 0.2 mm in design value, a chip having a nose radius R of 0.2 mm or less is used. On the other hand, when setting the reference position of the chip, the point at which the nose tip 102a is in contact with two lines in the direction along the axis J of the work W and the direction perpendicular thereto is used as the reference as described above.

【0009】ところが、従来のポジタイプのチップの切
刃は、にげ角θが付与されているだけでなく、ノーズ先
端102aから遠ざかる(離れる)に従い切刃(刃先稜
線)が低位、つまり低くなっていることから、ノーズ1
02の平面視における円弧形状(ノーズ半径)は、設定
値が例えばR0.2mmであってもノーズ先端102a
から遠ざかる程、微視的には、図15中2点鎖線で示し
た真円の円弧に対しノーズ先端102aから離れる程そ
の径が小さく歪むようになっており、ワークWに対し基
準点をなす円弧状切刃116の2点、Sk、Stは厳密
にはR0.2mmの円弧よりも内側に存在する。しかし
て、平面視においてこのように正確とはいえない円弧か
らなる円弧状切刃116で、ワークWのテーパや円弧状
部位を旋削することとなるため、その加工精度は、ノー
ズ102の円弧状切刃116の円弧の歪み(誤差)分、
低下することになる。したがって超精密加工で期待され
る精度が確保できないといった問題があった。
However, the cutting edge of the conventional positive type tip is not only provided with an angle of inclination θ, but also has a lower cutting edge (edge line), that is, a lower cutting edge as the distance from the nose tip 102a increases. Nose 1
02 in a plan view, the nose tip 102a has a set value of, for example, R0.2 mm.
Microscopically, the farther away from the nose tip 102a, the smaller the diameter of the true circular arc shown by the two-dot chain line in FIG. Strictly speaking, two points, Sk and St, of the arc-shaped cutting edge 116 exist inside the arc of R0.2 mm. The tapered or arcuate portion of the workpiece W is turned with the arcuate cutting edge 116 made of an arc that is not accurate in plan view. Distortion (error) of the arc of the cutting blade 116,
Will decrease. Therefore, there has been a problem that the precision expected in ultra-precision machining cannot be secured.

【0010】本発明は、超精密加工される小型(小物)
の軸部品の旋削加工に用いられるチップのもつ、こうし
た問題点に鑑みてなされたもので、芯高さが出しやす
く、しかも寸法精度の高い仕上げ加工のできるチップを
提供することを目的とする。
[0010] The present invention is a small (small item) to be ultra-precision machined.
An object of the present invention is to provide a chip which can be finished with high dimensional accuracy, with a high core height, which has been made in view of such problems of a chip used for turning of a shaft part.

【0011】[0011]

【課題を解決するための手段】前記の問題点を解消する
ために本発明は、板状を成し、ノーズ半径が0.5mm
以下であり、ノーズの円弧状切刃に連なる直線状切刃が
ノーズ先端から離れるに従って低位とされ、かつ直線状
切刃にはランドを備えることなくブレーカ溝を備えてな
るポジタイプのスローアウェイチップにおいて、すくい
面のうちノーズ先端寄り部位であって少くとも円弧状切
刃を構成する部位を、スローアウェイチップの下面と平
行な平坦面部としたことを特徴とする。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a plate shape and a nose radius of 0.5 mm.
In the following, in a positive-type throw-away insert, a straight cutting edge connected to an arc-shaped cutting edge of the nose is lowered as it moves away from the tip of the nose, and the straight cutting edge is provided with a breaker groove without a land. A portion of the rake face that is closer to the tip of the nose and that forms at least an arcuate cutting edge is a flat surface parallel to the lower surface of the throw-away tip.

【0012】本発明のチップにおいては、すくい面のう
ちノーズ先端寄り部位であって少くとも円弧状切刃を構
成する部位を、スローアウェイチップの下面と平行な平
坦面部としたものである。つまり、円弧状切刃を平坦面
部の外周縁に存在させたものである。したがって、該チ
ップをホルダーにクランプして刃物台にセットし、ワー
クの芯高さにそのノーズ先端の高さを合わせるにあたっ
ては、その平坦面部をワークの最下端部(点)に当接さ
せることができる。したがって、ワークへの食い込みも
防止されるので、芯高さ精度の向上が図られるし、チッ
ピングも防止される。
In the insert of the present invention, the portion of the rake face that is closer to the tip of the nose and forms at least an arcuate cutting edge is a flat surface parallel to the lower surface of the throw-away tip. That is, the arc-shaped cutting blade is provided on the outer peripheral edge of the flat surface portion. Therefore, when the tip is clamped to the holder and set on the tool post, and the height of the tip of the nose is adjusted to the height of the core of the work, the flat surface portion is brought into contact with the lowermost end (point) of the work. Can be. Therefore, biting into the work is prevented, so that the accuracy of the center height is improved, and chipping is also prevented.

【0013】しかも、平坦面部が、スローアウェイチッ
プの下面と平行であり、円弧状切刃をその平坦面部の外
周縁に存在させたものであるから、平面視、円弧状切刃
の円弧に歪みのない正確な円弧を問題なく形成できる。
そして、このような正確な円弧を持つ円弧状切刃で加工
するため加工精度の低下を防止できる。しかも、切刃を
構成する平坦面部はノーズ先端寄り部位にあるだけであ
るから、大切り込みにおける切り屑処理の問題もない。
In addition, since the flat surface portion is parallel to the lower surface of the throw-away tip and the arc-shaped cutting edge is present on the outer peripheral edge of the flat surface portion, the circular arc of the arc-shaped cutting edge is distorted in plan view. Accurate arcs without defects can be formed without problems.
And since it processes by the arc-shaped cutting blade which has such an accurate circular arc, a fall of processing accuracy can be prevented. In addition, since the flat surface portion constituting the cutting blade is only located at a position near the tip of the nose, there is no problem of chip processing in large cutting.

【0014】なお、本発明において平坦面部を設ける領
域を「少くとも円弧状切刃を構成する部位に」としたの
は、平坦面部は、円弧状切刃を構成する部位を超えて、
つまり円弧状切刃に連なる直線状の切刃を構成するすく
い面に及んでいてもよいことを意味するが、その範囲は
なるべく小さくするのが好ましい。その範囲が小さいほ
ど、切込みが小さいときにおいてもブレーカ溝の役割を
損ねないためである。すなわち、平坦面部は、すくい面
のうちノーズ先端寄り部位であって、円弧状切刃を構成
する部位のみ、又は同円弧状切刃及びそれに連なる直線
状切刃の円弧状切刃寄りの近傍部分(微小部分)を構成
する部位とするのが好ましい。
In the present invention, the region where the flat surface portion is provided is defined as "at least a portion forming the arcuate cutting edge" because the flat surface portion extends beyond the portion forming the arcuate cutting edge.
In other words, it means that the rake face may form a straight cutting edge connected to the arc-shaped cutting edge, but the range is preferably as small as possible. This is because the smaller the range is, the less the role of the breaker groove is impaired even when the cut is small. That is, the flat surface portion is a portion of the rake face near the nose tip and only a portion constituting the arc-shaped cutting edge, or a portion near the arc-shaped cutting edge of the arc-shaped cutting edge and the linear cutting edge connected thereto. It is preferable to use a portion constituting (a minute portion).

【0015】前記手段においては前記平坦面部のノーズ
先端と反対側縁を、平面視、ノーズ半径より大きい半径
で凹と成す円弧状とするとよい。このようにすれば、平
坦面部は、三日月形状若しくは略三日月形状をなし、切
込みが小さいときにおいてもブレーカ溝の役割を具合よ
く果たすことができるので切り屑処理性を損ねず、した
がって切り屑を仕上げ面に接触し難くできるためであ
る。
In the above means, it is preferable that the edge of the flat surface opposite to the tip of the nose is formed in an arc shape that is concave with a radius larger than the nose radius in plan view. With this configuration, the flat surface portion has a crescent shape or a substantially crescent shape, and can effectively fulfill the role of the breaker groove even when the cut is small, so that the chip disposability is not impaired, and thus the chip is finished. This is because it is difficult to contact the surface.

【0016】もっとも、前記平坦面部のノーズ先端と反
対側縁は、平面視、直線状としてもよい。この場合、平
坦面部におけるノーズ先端を挟む切刃(稜線)の両端が
円弧状切刃の端点(円弧状切刃と直線状切刃の接続点)
にあるときは平坦面部は割円形状となり、平坦面部が広
くなるため、芯高さをだす時におけるワークへの食込み
やノーズ先端のチッピングがし難くなる。
The edge of the flat surface opposite to the tip of the nose may be linear in plan view. In this case, both ends of the cutting edge (ridge line) sandwiching the tip of the nose on the flat surface portion are the end points of the arc-shaped cutting edge (connection point between the arc-shaped cutting edge and the linear cutting edge).
, The flat surface portion has a split circle shape and the flat surface portion is widened, so that it is difficult to cut into the work and chip the tip of the nose when the core height is obtained.

【0017】そして、前記平坦面部は、いずれにおいて
も研磨されてなるものがよい。本発明に係るスローアウ
ェイチップは、原料粉体をプレス成形して焼結すること
で製造され、その焼結状態のままでも用いることができ
るが、このように平坦面部が研磨されていると、その
分、切刃(稜線)が高精度で鋭利(シャープ)となるの
で、加工精度及び切味が向上する。
Preferably, the flat surface portion is polished in any case. The throw-away tip according to the present invention is manufactured by press-molding and sintering the raw material powder, and can be used as it is in the sintered state, but when the flat surface portion is polished as described above, As a result, the cutting edge (ridge line) becomes sharp with high precision, so that the processing accuracy and sharpness are improved.

【0018】なお、このように研磨する際には、前記平
坦面部は、Ra(中心線平均粗さ):0.2μm以下と
するのが好ましい。とくに、加工硬化の激しい難削材や
直径数mm以内の極小ワークの精密加工に用いる場合に
はRa:0.1μm以下とするとよい。なお、前記平坦
面部と逃げ面とのなす稜線に、すくい面側からみて、幅
0.03mm以下の面取(ネガランド)を付けてもよ
い。実質的に切れ味の低下を招くことなく、刃先強度を
アップすることができるためである。
In the above polishing, it is preferable that the flat surface portion has a Ra (center line average roughness): 0.2 μm or less. In particular, when it is used for difficult-to-cut materials with extremely high work hardening or for precision machining of extremely small workpieces having a diameter of several mm or less, Ra: 0.1 μm or less is preferable. In addition, a chamfer (negative land) having a width of 0.03 mm or less when viewed from the rake face may be provided on a ridge formed by the flat surface and the flank. This is because the edge strength can be increased without substantially lowering the sharpness.

【0019】[0019]

【発明の実施の形態】本発明に係る実施形態例につい
て、図1〜6を参照して詳細に説明する。図1は本実施
形態例に係るポジタイプの菱形スローアウェイチップ1
を示す平面図であり、超硬合金、サーメットなどから形
成されている。このものは、全体が平面視略菱形の平板
状をなし、左右の対向する鋭角部に2つのノーズ2を備
えた対称形を成し、各ノーズ2を挟むように直線状切刃
3を備えている。そして、直線状切刃3には切刃ランド
を備えることなく同切刃3に沿って断面円弧状のブレー
カ溝4を備えている(図3,4参照)。また、図2に示
したように、逃げ面5にはにげ角θが付与されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described in detail with reference to FIGS. FIG. 1 shows a positive diamond-shaped throw-away tip 1 according to this embodiment.
FIG. 3 is a plan view showing a hard metal and a cermet. This device has a generally rhombic flat plate shape in a plan view, has a symmetrical shape with two nose portions 2 at opposite right and left acute angle portions, and has a straight cutting blade 3 so as to sandwich each nose 2. ing. The straight cutting edge 3 is provided with a breaker groove 4 having an arc-shaped cross section along the cutting edge 3 without providing a cutting edge land (see FIGS. 3 and 4). Further, as shown in FIG. 2, the flank 5 is provided with an angle of inclination θ.

【0020】そして、図5,6に示したように、すくい
面6のうちノーズ先端2a寄り部位であって円弧状切刃
7の平面視円弧の端点と、ノーズ2を挟む両側の直線状
切刃3の端点との各接続点P1より各直線状切刃3側に
L(例えば0.5mm)入った点P2相互を、ノーズ半
径R1より大きい半径R2からなる円弧(線)で結び、
この円弧からノーズ先端2a寄り部位が、チップ1の下
面9と平行な平坦面部11とされている。しかして、本
例の平坦面部11は、ノーズ先端2aと反対側縁を半径
R2の円弧としたことから平面視略三日月形状を成して
いる。そして、本例ではノーズ半径R1は例えば0.2
mmとされているが、円弧状切刃(刃先)7は平坦面部
11の外周縁に存在するため、半径0.2mmの正確な
円弧を成している。
As shown in FIGS. 5 and 6, the rake face 6 is located closer to the tip 2a of the rake face and the end point of the arc of the arcuate cutting blade 7 in plan view, and the straight cuts on both sides sandwiching the nose 2 are formed. Points P2, which are L (for example, 0.5 mm) on each straight cutting edge 3 side from each connection point P1 with the end point of the blade 3, are connected to each other by an arc (line) having a radius R2 larger than the nose radius R1,
A portion closer to the nose tip 2 a from this arc is a flat surface portion 11 parallel to the lower surface 9 of the chip 1. Thus, the flat surface portion 11 of the present example has a substantially crescent shape in a plan view since the edge opposite to the nose tip 2a is an arc having a radius R2. In this example, the nose radius R1 is, for example, 0.2.
However, since the arc-shaped cutting edge (edge) 7 is present on the outer peripheral edge of the flat surface portion 11, it forms an accurate arc having a radius of 0.2 mm.

【0021】また、本例では平坦面部11はノーズ2を
挟む両側の直線状切刃3に挟まれる角の2等分線に対し
対称とされている。そして、平坦面部11はRa:0.
1μm以下となるように研磨されている。さらに、本例
では直線状切刃3は、点P2からノーズ先端2aと反対
側に向かうにしたがって所定の点(切込み領域)まで次
第に低位となるように構成されている。このように直線
状切刃3が低位をなしている範囲では、同切刃3は平面
視P1とP2とを結ぶ直線(図5中2点鎖線)の延長線
上に位置せずそれより内側に存在する。
In this embodiment, the flat surface portion 11 is symmetrical with respect to a bisector of an angle between the straight cutting blades 3 on both sides of the nose 2. The flat surface portion 11 has Ra: 0.
Polished so as to be 1 μm or less. Further, in this example, the straight cutting edge 3 is configured to gradually lower from a point P2 to a predetermined point (cutting area) as going toward the side opposite to the nose tip 2a. As described above, in the range where the linear cutting edge 3 is in a lower position, the cutting edge 3 is not located on the extension of the straight line (two-dot chain line in FIG. 5) connecting the planes P1 and P2 and is located inside the line. Exists.

【0022】なお、本例ではすくい面6の中央にホルダ
ーへのクランプ手段として取付け用の円形貫通孔19が
設けられており、それと同芯状にノーズ2の平坦面部1
1と同一高さの中央平坦部20が設けられている。そし
て、中央平坦部20のノーズ2側中央からノーズ2に向
けて半島状に延びかつ中央平坦部20と同一高さをなす
半島状平坦部21を備えている。こうして本例ではノー
ズ2の平坦面部11及び直線状切刃3と、半島状平坦部
21及び中央平坦部20のと間が凹と成す断面円弧状の
ブレーカ溝4をなしており、直線状切刃3に沿うブレー
カ溝4は切込み領域においてはノーズ2から離れる程幅
が広くなるように構成されている。
In the present embodiment, a circular through hole 19 for mounting is provided in the center of the rake face 6 as a clamping means to the holder, and the flat face portion 1 of the nose 2 is coaxial with the through hole.
A central flat portion 20 having the same height as 1 is provided. A peninsula-shaped flat portion 21 extending in the shape of a peninsula from the center of the nose 2 side of the center flat portion 20 toward the nose 2 and having the same height as the center flat portion 20 is provided. Thus, in this example, the breaker groove 4 having an arc-shaped cross section is formed between the flat surface portion 11 and the linear cutting edge 3 of the nose 2 and the peninsular flat portion 21 and the central flat portion 20 so as to be concave. The breaker groove 4 along the blade 3 is configured such that its width increases as the distance from the nose 2 increases in the cut area.

【0023】このように形成された本形態のチップ1
は、そのノーズ半径R1が0.2mmであり、したがっ
て、ワークの異径部のコーナー(大径部の端面と小径部
の外周面の成す隅角)に半径0.2mm以上の隅肉R
(アール)の与えられた軸部品の加工に使用される。こ
の際、まずチップ1のノーズ先端2aをワークの芯高さ
(回転中心)に合わせるためには、図3に示したよう
に、ワークWの最下端点にチップ1のノーズ2の平坦面
部11を当接させればよい。したがって、従来の点又は
線状のノーズ先端に比べると、面であるから視認し易い
上に、ワークWへの食い込みを防止でき、芯高さを正確
に割り出すことができるし、チッピングも起こしにく
い。
The thus-formed chip 1 of the present embodiment
Has a nose radius R1 of 0.2 mm. Therefore, a fillet R having a radius of 0.2 mm or more is formed at a corner of a different diameter portion of a work (a corner formed by an end face of a large diameter portion and an outer peripheral surface of a small diameter portion).
Used for machining shaft parts given (R). At this time, in order to match the nose tip 2a of the tip 1 to the center height (rotation center) of the workpiece, the flat surface portion 11 of the nose 2 of the tip 1 is located at the lowermost point of the workpiece W as shown in FIG. Should be brought into contact. Therefore, as compared with the conventional point or linear nose tip, it is easy to visually recognize because it is a surface, and it is possible to prevent biting into the work W, accurately determine the core height, and hardly cause chipping. .

【0024】本例では、平面視において平坦面部11の
うちノーズ先端2aと反対側縁を凹と成す円弧状とした
が、図5中2点鎖線で示したように、これをP2間を結
ぶ直線としてもよい。この様にすれば、平坦面部(面
積)11が大きくなるので、その分、芯高さを出す場合
の食い込み防止効果が高く、チッピング防止効果も高く
なる。ただし、このものでは、反面、ノーズ先端2aに
おけるブレーカ溝4までの距離が遠くなるので、切り込
みが小さくなるとブレーカ溝4の働きが悪くなり、切り
屑処理性の低下を招く。
In the present embodiment, the flat surface portion 11 has a circular arc shape having a concave edge on the side opposite to the nose tip 2a in plan view. However, as shown by a two-dot chain line in FIG. It may be a straight line. By doing so, the flat surface portion (area) 11 is increased, and accordingly, the effect of preventing biting when the core height is increased and the effect of preventing chipping are also increased. However, in this case, on the other hand, the distance from the nose tip 2a to the breaker groove 4 is long. Therefore, when the cut is small, the function of the breaker groove 4 is deteriorated, and the chip handling property is reduced.

【0025】これより理解されるように、小切り込みか
ら大切り込みまでを受け持つ必要のあるこの種のチップ
1では、前記のように平坦面部11を略三日月形状とす
るなど、平面視、ノーズ先端2aと反対側縁を凹となす
ようにするのがよい。なお、図5の平坦面部11では、
その平面視における最大幅(中央の幅W)はノーズ半径
R1より小さくするのが切り屑処理上好ましい。
As will be understood from the above description, in this type of chip 1 which is required to cover from the small cut to the large cut, the flat surface portion 11 has a substantially crescent shape as described above. The opposite side edge is preferably concave. In addition, in the flat surface part 11 of FIG.
It is preferable in terms of chip processing that the maximum width (center width W) in plan view be smaller than the nose radius R1.

【0026】そして、本例では平坦面部11がスローア
ウェイチップ1の下面9と平行に存在しているから、ノ
ーズ2の円弧状切刃7で加工されるようなテーパ加工や
円弧状部位のならい加工においても、1平面上で正確な
円弧をなす円弧状切刃7での加工となるため加工精度に
狂いを生じない。しかも、本例では平坦面部11がノー
ズ先端2a寄り部位にあるだけであるから、大切り込み
においてもその切り屑処理における問題もない。したが
って、切込み量の大きく異なる断面形状の小型の精密軸
部品の棒材加工に極めて適するものといえる。
In the present embodiment, since the flat surface portion 11 is present in parallel with the lower surface 9 of the throw-away tip 1, the flat surface portion 11 is tapered or shaped like an arc-shaped portion to be processed by the arc-shaped cutting blade 7 of the nose 2. Also in the processing, the processing is performed with the arc-shaped cutting blade 7 forming an accurate arc on one plane, so that the processing accuracy does not change. In addition, in this example, since the flat surface portion 11 is only located at a position near the nose tip 2a, there is no problem in chip processing even in a large cutting. Therefore, it can be said that it is extremely suitable for bar processing of a small precision shaft part having a cross-sectional shape having a greatly different cutting depth.

【0027】なお、このようなチップ1は、従来の超硬
合金製チップ、サーメット製チップなど同様に、原料粉
体をプレス成形して焼成することで形成されるが、その
後、少くとも平坦面部11を研磨しておくとよい。この
ようにすれば、ノーズ2の円弧状切刃7つまり逃げ面5
と平坦面部11とのなす稜線がよりシャープとなるため
である。この際、Ra:0.1μm以下となるように研
磨するのが好ましい。
Note that such a chip 1 is formed by pressing and firing raw material powder in the same manner as a conventional cemented carbide chip, a cermet chip, or the like. Thereafter, at least a flat surface portion is formed. 11 is preferably polished. In this way, the arcuate cutting edge 7 of the nose 2, that is, the flank 5
This is because the ridge line between the flat surface portion 11 and the ridge line becomes sharper. At this time, polishing is preferably performed so that Ra becomes 0.1 μm or less.

【0028】図7は、平坦面部11の別の実施形態を示
したものである。図7のものは前記形態における平坦面
部11が、直線状切刃3にも及んだ形の三日月形状であ
ったのに対し、このものは、平坦面部11をノーズ2の
円弧状切刃7部位にのみ沿って設けると共に、平面視に
おいて、平坦面部11のうちノーズ先端2aと反対側縁
を直線状とし、平坦面部11の形状を割円形状としたも
のである。つまり、ノーズ2の円弧状切刃7の端点と直
線状切刃3の端点との接続点P1相互を結んだ直線と、
円弧状切刃7に包囲されるすくい面の範囲を平坦面部1
1とたものである。なお、この場合においても、ノーズ
先端2aと反対側縁を直線でなく図中2点鎖線で示した
ように凹と成す円弧状としてもよい。
FIG. 7 shows another embodiment of the flat surface portion 11. 7 has a crescent shape in which the flat surface portion 11 in the above-described embodiment extends to the linear cutting edge 3, whereas in this embodiment, the flat surface portion 11 has the arc-shaped cutting edge 7 of the nose 2. In addition to being provided along only the part, the edge of the flat surface portion 11 on the side opposite to the nose tip 2a is straight, and the shape of the flat surface portion 11 is a split circle shape in plan view. That is, a straight line connecting the connection points P1 between the end points of the arc-shaped cutting edges 7 of the nose 2 and the end points of the linear cutting edges 3,
The area of the rake face surrounded by the arcuate cutting blade 7 is
It is one. In this case as well, the side edge opposite to the nose tip 2a may not be a straight line but a concave arc shape as shown by a two-dot chain line in the figure.

【0029】本発明における平坦面部11の形状は、前
記したような三日月形状や割円形状に限定されるもので
はなく、例えば図8に示したように、その平面形状を一
定の幅の馬蹄形状とすることもできる。
The shape of the flat surface portion 11 in the present invention is not limited to the crescent shape or the split circle shape as described above. For example, as shown in FIG. It can also be.

【0030】さらに、切り屑処理に影響がない範囲であ
れば、図9に示したように、平坦面部11を半島状平坦
部21に連なるように形成してもよい。これより理解さ
れるように、本発明におけるノーズ先端寄り部位の平坦
面部は、すくい面のうちノーズ先端寄り部位であって少
くとも円弧状切刃を構成する部位に、スローアウェイチ
ップの下面と平行に設けられておればよく、その形状は
適宜に設定することができる。ただし、前記もしたよう
に平坦面部が広いとワークの芯高さを出す場合には適す
る反面、ブレーカ溝までの距離が遠くなるので、切り込
みが小さくなると切り屑処理性が低下する。
Further, the flat surface portion 11 may be formed so as to be continuous with the peninsula-shaped flat portion 21 as shown in FIG. As understood from this, the flat surface portion of the nose tip portion in the present invention is parallel to the lower surface of the throw-away tip at a portion of the rake face near the nose tip and constituting at least an arc-shaped cutting edge. And its shape can be set as appropriate. However, as described above, if the flat surface portion is wide, it is suitable for increasing the center height of the work, but on the other hand, the distance to the breaker groove is long.

【0031】前記形態では、菱形チップで説明したが、
本発明は、正方形などのその他の四角チップや三角、六
角などの各種の多角形の板状(ないし平板状)のスロー
アウェイチップにおいて適用できるし、コーティング付
きのものにおいても適用できる。また、島状平坦部の形
状やホルダーへのクランプ手段などは適宜のものとし得
るなど、本発明の要旨を逸脱しない範囲において適宜設
計変更して具体化できる。
In the above-described embodiment, the explanation has been made with a diamond-shaped chip.
The present invention can be applied to other square chips such as squares, various polygonal plate-like (or flat plate-like) throw-away chips such as triangles and hexagons, and also to coated tips. Further, the shape of the island-shaped flat portion, the means for clamping to the holder, and the like can be made as appropriate, and can be embodied by appropriately changing the design without departing from the gist of the present invention.

【0032】[0032]

【発明の効果】以上の説明から明らかなように本発明の
スローアウェイチップによれば、そのノーズ先端寄り部
位の平坦面部により、ホルダーにクランプして刃物台に
セットし、ワークの芯(回転中心)高さに、ノーズ先端
の高さを合わせる際には、その平坦面部をワークの最下
端点に当接させることができる。したがって、ワークへ
の食い込みも防止されるので、芯高さ精度の向上が図ら
れるし、チッピングも防止される。
As is clear from the above description, according to the indexable insert of the present invention, the flat surface portion near the tip of the nose is clamped to the holder and set on the tool post, and the work center (rotation center) is set. When the height of the tip of the nose is adjusted to the height, the flat surface portion can be brought into contact with the lowermost point of the work. Therefore, biting into the work is prevented, so that the accuracy of the center height is improved, and chipping is also prevented.

【0033】また、平坦面部が、スローアウェイチップ
の下面と平行に存在しているから、ノーズの平面視にお
ける円弧状切刃の円弧形状に歪みがないので、その円弧
状切刃で加工されるようなワークのテーパ加工やならい
加工においても精度の低下がない。しかも、平坦面部は
ノーズ先端寄り部位にあるだけであるから、大切り込み
においてもその切り屑処理における問題はない。これに
より、本発明に係るチップは、超精密加工される小物の
軸部品のように、広範な切込み範囲で超精密仕上げが要
求される棒材加工に極めて適するものといえる。
Further, since the flat surface portion is present in parallel with the lower surface of the throw-away tip, there is no distortion in the arc shape of the arc-shaped cutting blade in a plan view of the nose, so that the nose is machined with the arc-shaped cutting blade. There is no reduction in accuracy even in such a taper processing or a workpiece processing. In addition, since the flat surface portion is located only at the position near the tip of the nose, there is no problem in processing the chips even in the case of large cutting. Thus, it can be said that the tip according to the present invention is extremely suitable for bar material processing requiring ultra-precision finishing in a wide cutting range, such as a small shaft part to be subjected to ultra-precision processing.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係るスローアウェイチップの平面図及
びその要部拡大図。
FIG. 1 is a plan view of a throw-away tip according to the present invention and an enlarged view of a main part thereof.

【図2】図1をチップを矢印Cから見た部分図。FIG. 2 is a partial view of FIG.

【図3】図1のA−A線拡大断面図。FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;

【図4】図1のB−B線拡大断面図。FIG. 4 is an enlarged sectional view taken along line BB of FIG. 1;

【図5】図1のチップのノーズの拡大平面図。FIG. 5 is an enlarged plan view of a nose of the chip of FIG. 1;

【図6】図1のチップのノーズをすくい面側から見た拡
大斜視図。
FIG. 6 is an enlarged perspective view of the nose of the chip of FIG. 1 as viewed from the rake face side.

【図7】平坦面部の別の実施形態を説明する拡大平面
図。
FIG. 7 is an enlarged plan view illustrating another embodiment of the flat surface portion.

【図8】平坦面部の別の実施形態を説明する拡大平面
図。
FIG. 8 is an enlarged plan view illustrating another embodiment of the flat surface portion.

【図9】平坦面部の別の実施形態を説明する拡大平面
図。
FIG. 9 is an enlarged plan view illustrating another embodiment of the flat surface portion.

【図10】従来の小型軸部品加工用の菱形スローアウェ
イチップの平面図及びその部分拡大図。
FIG. 10 is a plan view and a partially enlarged view of a conventional diamond-shaped throw-away tip for processing a small shaft part.

【図11】図10のチップを矢印Cから見た部分図。FIG. 11 is a partial view of the chip of FIG.

【図12】図10のA−A線拡大断面図。FIG. 12 is an enlarged sectional view taken along line AA of FIG. 10;

【図13】図10のB−B線拡大断面図。FIG. 13 is an enlarged sectional view taken along line BB of FIG. 10;

【図14】従来のチップで加工する際の問題点を説明す
るノーズ部分の拡大図。
FIG. 14 is an enlarged view of a nose portion for explaining a problem when processing with a conventional chip.

【図15】図14のノーズ部分の拡大図。FIG. 15 is an enlarged view of a nose part of FIG. 14;

【符号の説明】[Explanation of symbols]

1 スローアウェイチップ 2 ノーズ 2a ノーズ先端 3 直線状切刃 4 ブレーカ溝 6 すくい面 7 円弧状切刃 9 スローアウェイチップの下面 11 平坦面部 DESCRIPTION OF SYMBOLS 1 Throw-away tip 2 Nose 2a Nose tip 3 Straight cutting edge 4 Breaker groove 6 Rake surface 7 Arc-shaped cutting edge 9 Lower surface of throw-away tip 11 Flat surface

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 板状を成し、ノーズ半径が0.5mm以
下であり、ノーズの円弧状切刃に連なる直線状切刃がノ
ーズ先端から離れるに従って低位とされ、かつ直線状切
刃にはランドを備えることなくブレーカ溝を備えてなる
ポジタイプのスローアウェイチップにおいて、 すくい面のうちノーズ先端寄り部位であって少くとも円
弧状切刃を構成する部位に、スローアウェイチップの下
面と平行な平坦面部を設けたことを特徴とするスローア
ウェイチップ。
1. A plate-like shape having a nose radius of 0.5 mm or less, and a linear cutting edge connected to an arc-shaped cutting edge of the nose is lowered as the distance from the nose tip increases, and the linear cutting edge has A positive-type indexable insert that has a breaker groove without a land, and a flat surface parallel to the lower surface of the indexable insert that is at least near the nose tip of the rake face and that forms an arc-shaped cutting edge. A throw away tip characterized by having a surface.
【請求項2】 前記平坦面部のノーズ先端と反対側縁
を、平面視、ノーズ半径より大きい半径で凹と成す円弧
状としたことを特徴とする請求項1記載のスローアウェ
イチップ。
2. The indexable insert according to claim 1, wherein an edge of the flat surface opposite to the tip of the nose is formed into an arc shape having a radius larger than the nose radius in plan view.
【請求項3】 前記平坦面部のノーズ先端と反対側縁
を、平面視、直線状としたことを特徴とする請求項1記
載のスローアウェイチップ。
3. The throw-away tip according to claim 1, wherein an edge of the flat surface opposite to the tip of the nose is linear in plan view.
【請求項4】 前記平坦面部が研磨されてなることを特
徴とする請求項1乃至3記載のスローアウェイチップ。
4. The indexable insert according to claim 1, wherein said flat surface portion is polished.
【請求項5】 前記平坦面部が、Ra:0.2μm以下
であることを特徴とする請求項4記載のスローアウェイ
チップ。
5. The indexable insert according to claim 4, wherein the flat surface portion has a Ra: 0.2 μm or less.
JP10259262A 1998-08-28 1998-08-28 Throwaway tip Pending JP2000071110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10259262A JP2000071110A (en) 1998-08-28 1998-08-28 Throwaway tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10259262A JP2000071110A (en) 1998-08-28 1998-08-28 Throwaway tip

Publications (1)

Publication Number Publication Date
JP2000071110A true JP2000071110A (en) 2000-03-07

Family

ID=17331671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10259262A Pending JP2000071110A (en) 1998-08-28 1998-08-28 Throwaway tip

Country Status (1)

Country Link
JP (1) JP2000071110A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010530813A (en) * 2007-06-26 2010-09-16 テグテック・リミテッド Cutting insert with corner projection
WO2013132479A1 (en) * 2012-03-06 2013-09-12 Iscar Ltd. Cutting tool and cutting insert therfor
WO2013190977A1 (en) * 2012-06-21 2013-12-27 住友電工ハードメタル株式会社 Cutting tool
JP2014046448A (en) * 2012-09-04 2014-03-17 Mitsubishi Materials Corp Manufacturing method for cutting insert
WO2016043127A1 (en) * 2014-09-16 2016-03-24 住友電気工業株式会社 Cutting insert and manufacturing method therefor
JP2018176302A (en) * 2017-04-05 2018-11-15 株式会社タンガロイ Cutting insert and cutting tool
JP2018183829A (en) * 2017-04-25 2018-11-22 株式会社タンガロイ Cutting insert and manufacturing method of the same

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010530813A (en) * 2007-06-26 2010-09-16 テグテック・リミテッド Cutting insert with corner projection
US8821079B2 (en) 2012-03-06 2014-09-02 Iscar, Ltd. Cutting tool and cutting insert therefor
WO2013132479A1 (en) * 2012-03-06 2013-09-12 Iscar Ltd. Cutting tool and cutting insert therfor
JP2015509449A (en) * 2012-03-06 2015-03-30 イスカル リミテッド Cutting tool and cutting insert
CN104159689A (en) * 2012-03-06 2014-11-19 伊斯卡有限公司 Cutting tool and cutting insert therfor
US9707629B2 (en) 2012-06-21 2017-07-18 Sumitomo Electric Hardmetal Corp. Cutting tool
CN104411430A (en) * 2012-06-21 2015-03-11 住友电工硬质合金株式会社 Cutting tool
JP2014000663A (en) * 2012-06-21 2014-01-09 Sumitomo Electric Hardmetal Corp Cutting tool
WO2013190977A1 (en) * 2012-06-21 2013-12-27 住友電工ハードメタル株式会社 Cutting tool
TWI593486B (en) * 2012-06-21 2017-08-01 Sumitomo Electric Hardmetal Corp Cutting tools and cutting tools manufacturing methods
JP2014046448A (en) * 2012-09-04 2014-03-17 Mitsubishi Materials Corp Manufacturing method for cutting insert
WO2016043127A1 (en) * 2014-09-16 2016-03-24 住友電気工業株式会社 Cutting insert and manufacturing method therefor
CN105873701A (en) * 2014-09-16 2016-08-17 住友电气工业株式会社 Cutting insert and manufacturing method therefor
JPWO2016043127A1 (en) * 2014-09-16 2017-06-29 住友電気工業株式会社 Cutting insert and manufacturing method thereof
EP3195961A4 (en) * 2014-09-16 2017-09-20 Sumitomo Electric Industries, Ltd. Cutting insert and manufacturing method therefor
US10245644B2 (en) 2014-09-16 2019-04-02 Sumitomo Electric Industries, Ltd. Cutting insert and method of manufacturing the same
JP2018176302A (en) * 2017-04-05 2018-11-15 株式会社タンガロイ Cutting insert and cutting tool
JP2018183829A (en) * 2017-04-25 2018-11-22 株式会社タンガロイ Cutting insert and manufacturing method of the same

Similar Documents

Publication Publication Date Title
KR100492201B1 (en) Cutting tool
CA2249960C (en) Milling cutter
KR102400417B1 (en) Double-sided high feed milling insert, high feed milling tool and method
US11338371B2 (en) Cutting insert
CN109475944B (en) Turning insert
JP2000071110A (en) Throwaway tip
JP2002301603A (en) Throwaway cutting tip and method of positioning cutting tip holder and throwaway cutting tip
JP4048685B2 (en) Throwaway tip
JP3118956B2 (en) Indexable tip
JPH0360909A (en) Ball end mill
KR102316725B1 (en) End mill Having Cutting Tooth Made of Polycrystalline Diamond
CA2254233A1 (en) T-landed insert
JPH01228705A (en) Cutting tool
CN113396026B (en) Turning insert for metal cutting
JP7481377B2 (en) Finishing Tools
KR100592834B1 (en) Cutting tool and throw-away insert therefor
JP6658805B2 (en) Cutting insert
JPH11347803A (en) Throwaway tip and ram machining cutter
JP4320562B2 (en) Throwaway tip
JP2558412Y2 (en) Indexable tip
JP4653300B2 (en) Turning tool
JP2003231015A (en) Tip, throw-away tip, and rotary cutting tool
JPH072284B2 (en) Cutting tools
JP3159110B2 (en) Indexable cutting tools
JPH04300107A (en) Method and tool for machining tip mounting surface

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040810

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040907

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20050308