JPH11320234A - Formed cutter for working root part of vane - Google Patents
Formed cutter for working root part of vaneInfo
- Publication number
- JPH11320234A JPH11320234A JP13411398A JP13411398A JPH11320234A JP H11320234 A JPH11320234 A JP H11320234A JP 13411398 A JP13411398 A JP 13411398A JP 13411398 A JP13411398 A JP 13411398A JP H11320234 A JPH11320234 A JP H11320234A
- Authority
- JP
- Japan
- Prior art keywords
- cutter
- cutting
- blade
- blade root
- torsion
- 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】本願発明は、タ−ビンブレ−ドの
翼根部を加工する総型カッタに関するもので、加工能率
を向上させるための工具形状の改良に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for machining a blade root of a turbine blade, and more particularly to an improvement of a tool shape for improving machining efficiency.
【０００２】[0002]
【従来の技術】タ−ビンブレ−ドの翼根部は、凹凸の連
続した波形が翼根の表裏にＶ字状に形成され、これがロ
−タ−部と嵌合して固定される。この翼根部の加工には
従来から図１および図２に示すような翼根形状の輪郭を
もった総型カッタが用いられ、大型の翼根には内径付き
のものが用いられるが、これはその特徴的な形状からク
リスマスツリ−カッタとも呼ばれている。翼根形状は要
求精度が厳しく、その加工には粗切削から仕上げ切削ま
で数段階に分けて加工するのが常であり、要求精度を満
たすには切れ刃を精度よく工作できる一体の総型カッタ
が不可欠であった。2. Description of the Related Art A blade root portion of a turbine blade has V-shaped continuous irregularities formed on the front and back surfaces of the blade root, which are fitted and fixed to a rotor portion. Conventionally, for forming the blade root, a full-type cutter having a blade root-shaped profile as shown in FIGS. 1 and 2 has been used, and a large blade having an inner diameter has been used. It is also called a Christmas tree cutter because of its characteristic shape. The required accuracy of the blade root shape is strict, and it is usual to process it in several stages from rough cutting to finish cutting, and to meet the required accuracy, an integrated total cutter that can machine the cutting edge precisely Was indispensable.
【０００３】[0003]
【発明が解決しようとする問題点】しかしながら、従来
の一体形の総型カッタは、切れ刃を波状に連続して成形
できるため、切れ刃精度を得るには便宜があったが、切
削性能に関しては切れ刃が長く、かつねじれ角やすくい
角など切削性を高める施策がとれないため、切削抵抗が
大きく、送り速度が大きくできず、加工能率が良くない
というという問題があった。However, in the conventional integrated mold cutter, the cutting edge can be continuously formed in a wave shape, so that it is convenient to obtain the cutting edge accuracy. Since the cutting edge has a long cutting edge and measures to enhance the cutting properties such as easy torsion angle cannot be taken, there is a problem that cutting resistance is large, feed rate cannot be increased, and machining efficiency is not good.
【０００４】[0004]
【本発明の目的】本願発明は以上のような背景のもとに
なされたものであり、総型カッタを２以上の部分に分割
して製作することにより、切削性を高める手段を講じる
とともに切りくず排除にも配慮して、切削抵抗を減じて
送り速度を速くできる、加工能率の優れた翼根部加工用
の総型カッタを提供することを目的とする。SUMMARY OF THE INVENTION The object of the present invention is to provide a means for improving the machinability by cutting a mold cutter into two or more parts, thereby improving cutting performance and cutting. An object of the present invention is to provide a complete cutter for blade root machining with excellent machining efficiency, which can reduce the cutting resistance and increase the feed speed in consideration of scrap removal.
【０００５】[0005]
【問題を解決するための手段】本願発明は、上記の目的
を達成するために、タ−ビンブレ−ドの翼根部を加工す
る内径付きの総型カッタにおいて、カッタ本体をリング
状に、２以上の部分に分割して製作し、軸を貫通して組
み立て、一体のカッタとして用いることを特徴とする翼
根部加工用総型カッタである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a full-type cutter having an inner diameter for processing a blade root of a turbine blade, wherein the cutter body is formed in a ring shape. This is a complete cutter for blade root portion machining, characterized in that it is manufactured by being divided into parts, assembled through a shaft, and used as an integral cutter.
【０００６】[0006]
【作用】翼根部加工用総型カッタは、カッタ本体をリン
グ状に、２つ以上の部分に分割して製作することによ
り、短い切れ刃長さを高精度に成形すればよく、また刃
形を改良して切削性を高めることが可能になったのであ
る。態様として、切れ刃が長手方向に連続しないよう各
部分の切れ刃位置をずらして配置することにより、切り
くず長さを短くし、かつ、断続切削を緩和する。切れ刃
が連続した従来品における、切削抵抗が断続的に発生
し、また全刃長におよぶ長い切りくずを排出するという
欠点を改善するのである。[Function] The blade cutter processing die cutter is manufactured by dividing the cutter body into two or more parts in a ring shape to form a short cutting edge with high precision. It has become possible to improve the machinability by improving. As an aspect, by disposing the cutting edge position of each part so as to be shifted so that the cutting edge is not continuous in the longitudinal direction, the chip length is shortened and the intermittent cutting is eased. This improves the disadvantages of a conventional product having continuous cutting edges, in which cutting resistance is generated intermittently and long chips over the entire cutting length are discharged.
【０００７】また、各部分のねじれ角を大きくしたり、
各部分ごとにねじれ角を変化させることにより、切削抵
抗を減じることが可能となる。とくに各部分は切れ刃が
ほぼ凸形の輪郭をもつように分割することにより、切れ
刃を１刃毎にねじれ方向を変えた交互ねじれ刃や千鳥刃
に形成することが容易となり、切削性が著しく向上す
る。少なくとも１つの部分を交互ねじれ刃あるいは千鳥
刃とすることで効果を発揮する。尚、凸形の輪郭で分割
した場合輪郭精度を高めて切れ刃を成形できる。また、
分割とすることにより加工精度においても、とくに精度
が厳しい部分、さほどの精度を要しない部分とで任意に
形状を選択できる。精度が厳しい部分がわずかな損耗で
精度維持ができなくなれば、この部分のみを新規のもの
と交換して使用することで経済的な作業が行なえる。In addition, the twist angle of each part is increased,
By changing the torsion angle for each part, it is possible to reduce the cutting resistance. In particular, by dividing each part so that the cutting edge has a substantially convex contour, it becomes easy to form the cutting edge into alternate twisted blades or staggered blades in which the twist direction is changed for each blade, and machinability is improved. Significantly improved. The effect is exhibited by forming at least one of the portions as an alternately twisted blade or a staggered blade. In addition, when dividing | segmenting by a convex-shaped outline, a cutting edge can be shape | molded by raising the outline precision. Also,
By dividing the shape, it is possible to arbitrarily select a shape in a part where the processing accuracy is particularly severe and a part where the precision is not so required. If the precision cannot be maintained due to a small amount of wear in the parts with severe precision, economical work can be performed by replacing only these parts with new ones.
【０００８】[0008]
【実施例】以下、本発明をその実施例を示す図面に基づ
いて説明する。図３は本発明例であり、高速度工具鋼製
の直径１２０ｍｍ、長さ７６ｍｍ、刃数１２刃のタ−ビ
ンブレ−ドの翼根部加工用総型カッタであって、これを
リング状の４つの部分に切れ刃の凹部において分割した
ものである。分割の結果、直径１２０ｍｍ、長さ２０ｍ
ｍ、直径１０８ｍｍ、長さ１８ｍｍ、直径９６ｍｍ、長
さ１６ｍｍ、直径８５ｍｍ、長さ２２ｍｍの４つのカッ
タとなった。ここで、長さの一部のみに切れ刃が存する
最大径部分は図４に説明する右ねじれとし、他の３つの
部分はねじれ角１５度で、ねじれ方向を交互に変えた図
５に示す千鳥刃とした。カッタの内径には駆動のための
キ−溝を設け、これの位置を加減してキ−溝で組み立て
たとき、切れ刃の頂部が１５度を越えるねじれ角をなす
ようにした。これを従来品である右ねじれ刃１０°の一
体型カッタと比較に供した。耐熱鋼ＳＵＳ４３０製のタ
−ビンブレ−ド翼根を加工したところ、従来品が３５ｍ
ｍ／ｍｉｎの送り速度で使用していたのに対して、本発
明品は７０ｍｍ／ｍｉｎの送り速度が可能であって加工
時間を半減、したがって加工能率を倍増することができ
た。本実施例のほか、図６、図７および図８に示す態様
がある。図６、図７は切れ刃を不連続とした右ねじれ刃
で、図８は図９に示す交互ねじれ刃を用いたものであ
る。なお、本実施例においては各部分の刃数、工具材料
等は同一としたが、これらを変化して差し支えないこと
は既述の通りである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing embodiments thereof. FIG. 3 shows an example of the present invention, which is a complete cutter for machining a blade root portion of a turbine blade having a diameter of 120 mm, a length of 76 mm and a number of blades of 12 made of high-speed tool steel. It is divided into two parts at the concave portion of the cutting edge. As a result of division, diameter 120mm, length 20m
m, diameter 108 mm, length 18 mm, diameter 96 mm, length 16 mm, diameter 85 mm, and length 22 mm. Here, the maximum diameter portion where the cutting edge exists only in a part of the length is the right-hand twist described in FIG. 4, and the other three portions have a twist angle of 15 degrees and the twist direction is alternately shown in FIG. 5. A staggered blade. A key groove for driving is provided in the inner diameter of the cutter, and when the key groove is assembled by adjusting the position of the key groove, the top of the cutting edge has a twist angle exceeding 15 degrees. This was used for comparison with a conventional integrated cutter having a right twist blade of 10 °. When a turbine blade made of heat-resistant steel SUS430 was machined, the conventional product was 35m.
In contrast to the use at a feed rate of m / min, the product of the present invention was capable of a feed rate of 70 mm / min, halving the processing time and thus doubling the processing efficiency. In addition to the present embodiment, there are embodiments shown in FIGS. 6, 7, and 8. FIG. 6 and 7 show right-hand twisted blades with discontinuous cutting edges, and FIG. 8 shows the use of the alternating twisted blade shown in FIG. In this embodiment, the number of blades, the tool material, and the like in each portion are the same, but these may be changed as described above.
【０００９】[0009]
【発明の効果】以上のように本発明によれば、総型カッ
タを２以上の部分に分割して製作することにより、切削
性を高める刃形を構成することが可能となり、切りくず
排除を良好にして、加工能率の優れた翼根部加工用の総
型カッタが得られたのである。As described above, according to the present invention, it is possible to form a blade shape which enhances machinability by dividing and fabricating the mold cutter into two or more portions, thereby eliminating chip removal. By doing so, a complete die cutter for blade root machining with excellent machining efficiency was obtained.
【図１】図１は、従来品の正面図を示す。FIG. 1 shows a front view of a conventional product.
【図２】図２は、図１の側面図を示す。FIG. 2 shows a side view of FIG. 1;
【図３】図３は、本発明の実施例の正面図を示す。FIG. 3 shows a front view of an embodiment of the present invention.
【図４】図４は、図３の切れ刃の配置を説明する説明図
で右ねじれ刃を示す。FIG. 4 is an explanatory view illustrating the arrangement of the cutting blades in FIG. 3 and shows a right-hand twisting blade.
【図５】図５は、切れ刃の配置を説明する説明図で千鳥
刃を示す。FIG. 5 is an explanatory view for explaining the arrangement of cutting blades, showing a staggered blade.
【図６】図６は、本発明の他の実施例の正面図を示す。FIG. 6 shows a front view of another embodiment of the present invention.
【図７】図７は、図６の側面図を示す。FIG. 7 shows a side view of FIG. 6;
【図８】図８は、本発明の他の実施例の正面図を示す。FIG. 8 shows a front view of another embodiment of the present invention.
【図９】図９は、切れ刃の配置を説明する説明図で交互
ねじれ刃を示す。FIG. 9 is an explanatory view illustrating the arrangement of the cutting blades, and shows an alternate twist blade.
１ 本体 ２ 分割した部分 ４ 切れ刃 ５ 右ねじれ刃 ６ 左ねじれ刃 ７ キ−溝 α ねじれ角 DESCRIPTION OF SYMBOLS 1 Main body 2 Divided part 4 Cutting edge 5 Right helix edge 6 Left helix edge 7 Key groove α Helix angle
Claims (3)
径付きの総型カッタにおいて、カッタ本体をリング状
に、２以上の部分に分割して製作し、軸を貫通して組み
立て、一体のカッタとして用いることを特徴とする翼根
部加工用総型カッタ。1. A cutter having an inner diameter for machining a blade root of a turbine blade, wherein the cutter body is divided into two or more parts in a ring shape, and the cutter body is assembled through a shaft. A full-form cutter for blade root machining, characterized in that it is used as a cutter.
において、各部分を軸を貫通して一体のカッタとして組
み立てたとき、切れ刃が長手方向に不連続な箇所が生じ
るよう位置決めをして組み立てたことを特徴とする翼根
部加工用総型カッタ。2. The cutting tool according to claim 1, wherein when the parts are assembled as an integral cutter through the shaft, the cutting edge is positioned such that a discontinuity occurs in the longitudinal direction. A complete cutter for blade root machining, characterized by being assembled.
工用総型カッタにおいて、各部分は切れ刃がほぼ凸形の
輪郭をもつように分割し、少なくとも１つの部分は切れ
刃が交互ねじれを形成するよう配したことを特徴とする
翼根部加工用総型カッタ。3. The die cutter according to claim 1, wherein each of the portions is divided so that the cutting edge has a substantially convex contour, and at least one portion has alternating cutting edges. A die cutter for forming a blade root portion, which is arranged to form a twist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13411398A JP4365904B2 (en) | 1998-05-18 | 1998-05-18 | Complete cutter for blade root processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13411398A JP4365904B2 (en) | 1998-05-18 | 1998-05-18 | Complete cutter for blade root processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11320234A true JPH11320234A (en) | 1999-11-24 |
| JP4365904B2 JP4365904B2 (en) | 2009-11-18 |
Family
ID=15120773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13411398A Expired - Fee Related JP4365904B2 (en) | 1998-05-18 | 1998-05-18 | Complete cutter for blade root processing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4365904B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010023761A1 (en) * | 2008-08-29 | 2010-03-04 | オーエスジー株式会社 | Throw-away cutting rotary tool |
| US8714885B2 (en) | 2008-11-13 | 2014-05-06 | Osg Corporation | Throwaway rotary cutting tool |
-
1998
- 1998-05-18 JP JP13411398A patent/JP4365904B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010023761A1 (en) * | 2008-08-29 | 2010-03-04 | オーエスジー株式会社 | Throw-away cutting rotary tool |
| CN102099139A (en) * | 2008-08-29 | 2011-06-15 | Osg株式会社 | Throw-away cutting rotary tool |
| JP5108106B2 (en) * | 2008-08-29 | 2012-12-26 | オーエスジー株式会社 | Throw-away cutting rotary tool |
| KR101236094B1 (en) | 2008-08-29 | 2013-02-21 | 오에스지 가부시키가이샤 | Throw-away cutting rotary tool |
| US8807881B2 (en) | 2008-08-29 | 2014-08-19 | Osg Corporation | Throwaway rotary cutting tool |
| US8714885B2 (en) | 2008-11-13 | 2014-05-06 | Osg Corporation | Throwaway rotary cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4365904B2 (en) | 2009-11-18 |
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