JPH1080803A - Cutting tool - Google Patents
Cutting toolInfo
- Publication number
- JPH1080803A JPH1080803A JP25400096A JP25400096A JPH1080803A JP H1080803 A JPH1080803 A JP H1080803A JP 25400096 A JP25400096 A JP 25400096A JP 25400096 A JP25400096 A JP 25400096A JP H1080803 A JPH1080803 A JP H1080803A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cutting edge
- cutting tool
- tapered portion
- rod member
- 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
- Drilling Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、切削工具に係
り、特に、リリーフバルブやチェックバルブなどのシー
ト面を加工するのに最適な切削工具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool, and more particularly to a cutting tool most suitable for processing a seat surface such as a relief valve or a check valve.
【０００２】[0002]
【従来の技術】例えば、チェックバルブでは、そのポペ
ット部材を着座させるためのシート面を形成しなければ
ならない。そこで、図２に示すように、被加工体である
バルブボディ１に、円柱部２とその開口端を拡径させた
テーパ部３とからなる穴４を加工し、このテーパ部３を
シート面としている。そして、このテーパ部３を加工す
るために、従来、マニシングセンタに図３に示す切削工
具を組み込んでいた。2. Description of the Related Art For example, in a check valve, a seat surface for seating the poppet member must be formed. Therefore, as shown in FIG. 2, a hole 4 consisting of a cylindrical portion 2 and a tapered portion 3 having an enlarged opening end is formed in a valve body 1 which is a workpiece. And Conventionally, in order to machine the tapered portion 3, a cutting tool shown in FIG.
【０００３】切削工具は棒部材５からなり、その下端に
半径ｒの縮径部６を形成している。そして、図３(ｂ)に
示すように、この縮径部６の軸方向に溝７を形成し、複
数の第１切刃８を構成している。これら第１切刃８は、
棒部材５の軸線Ｓに平行に位置し、その軸線Ｓから等距
離ｒに配置されることになる。また、棒部材５には、縮
径部６によって段部９が形成されることになるが、この
段部９を軸線Ｓに対して角度θだけ傾斜させている。そ
して、図３(ｂ)に示すように、この棒部材５の軸方向に
溝１０を形成し、複数の第２切刃１１を構成している。[0003] The cutting tool is composed of a rod member 5 and has a reduced diameter portion 6 having a radius r at the lower end thereof. Then, as shown in FIG. 3B, a groove 7 is formed in the axial direction of the reduced diameter portion 6 to form a plurality of first cutting edges 8. These first cutting edges 8
The rod member 5 is located parallel to the axis S, and is disposed at an equal distance r from the axis S. A step 9 is formed on the rod member 5 by the reduced diameter portion 6, and the step 9 is inclined by an angle θ with respect to the axis S. Then, as shown in FIG. 3 (b), a groove 10 is formed in the axial direction of the rod member 5 to form a plurality of second cutting blades 11.
【０００４】なお、軸方向に形成した溝７、１０は、第
１、２切刃を形づくるためと、切粉の除去のために設け
られたものである。さらに、これら第１切刃８と第２切
刃１１との間には、棒部材５の径方向に形成した逃げ溝
１２を介在させている。この逃げ溝１２は、第１、２切
刃８、１１を砥ぐとき、その砥石の逃げを確保するため
形成しておかなければならないものである。The grooves 7, 10 formed in the axial direction are provided for forming the first and second cutting edges and for removing chips. Further, between the first cutting edge 8 and the second cutting edge 11, a clearance groove 12 formed in the radial direction of the rod member 5 is interposed. When the first and second cutting blades 8 and 11 are ground, the clearance groove 12 must be formed to secure the clearance of the grindstone.
【０００５】このようにした切削工具は、棒部材５の軸
線Ｓを中心として回転しながら、バルブボディ１側に移
動する。このとき、まず、第１切刃８によって、円柱部
２を加工する。したがって、バルブボディ１には半径ｒ
の円柱部２が形成されることになる。さらに、この切削
工具がバルブボディ１側に移動すると、第２切刃１１が
バルブボディ１に当接して、テーパ部３を加工する。し
たがって、バルブボディ１には角度θだけ傾斜させたテ
ーパ部３が形成されることになる。そして、テーパ部３
を加工したら、この切削工具をバルブボディ１から引き
抜いて、穴４の加工を終了することになる。The cutting tool moves toward the valve body 1 while rotating about the axis S of the rod member 5. At this time, first, the cylindrical portion 2 is processed by the first cutting blade 8. Accordingly, the valve body 1 has the radius r
Is formed. Further, when the cutting tool moves to the valve body 1 side, the second cutting edge 11 abuts on the valve body 1 to process the tapered portion 3. Therefore, the tapered portion 3 inclined by the angle θ is formed in the valve body 1. And the taper part 3
, The cutting tool is pulled out from the valve body 1 and the machining of the hole 4 is completed.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記従来例の
切削工具では、バルブボディ１から引き抜いたとき、テ
ーパ部３の内側がふくらんでしまうことがあった。つま
り、第２切刃１１がバルブボディ１に当接したとき、棒
部材５の径方向に形成した逃げ溝１２が、円柱部２内に
位置することになる。このとき、テーパ部３には第２切
刃１１が押し付けられるので、このテーパ部３の内側の
肉が、逃げ溝１２に逃げてしまう（図４参照）。逃げ溝
１２に逃げた肉は、この切削工具をバルブボディ１から
回転させながら引き抜くとき、そのほとんどが第１切刃
８によって切削されることになる。However, in the above-mentioned conventional cutting tool, when the cutting tool is pulled out from the valve body 1, the inside of the tapered portion 3 may be swollen. That is, when the second cutting blade 11 comes into contact with the valve body 1, the relief groove 12 formed in the radial direction of the rod member 5 is located in the column portion 2. At this time, since the second cutting edge 11 is pressed against the tapered portion 3, the meat inside the tapered portion 3 escapes to the escape groove 12 (see FIG. 4). Most of the meat that escapes to the escape groove 12 is cut by the first cutting edge 8 when the cutting tool is pulled out while rotating the cutting tool from the valve body 1.
【０００７】ところが、この肉の一部が、切削工具を引
き抜く力によってテーパ部３側に押し戻されて、テーパ
部３の内側がふくらんでしまうことがある（図５の矢印
参照）。また、第１切刃８が１回転しないほど早くこの
切削工具を引き抜いたときには、肉の一部がそのまま円
柱部２に残ってしまうこともある。このようにしてテー
パ部３の内側がふくらんだり、円柱部２の内周面がふく
らんだりすると、シートテーパ部３の真円度にばらつき
が生じてしまう。そのため、このテーパ部３をシート面
としたとき、ポペット部材との間に隙間ができ、そこか
ら作動油が漏れてしまうことがあった。この発明の目的
は、テーパ部の真円度を向上させることのできる切削工
具を提供することである。However, a part of the meat may be pushed back to the tapered portion 3 by a force for pulling out the cutting tool, and the inside of the tapered portion 3 may be inflated (see the arrow in FIG. 5). Also, when the cutting tool is pulled out so quickly that the first cutting edge 8 does not make one rotation, a part of the meat may remain in the cylindrical portion 2 as it is. When the inside of the tapered portion 3 bulges or the inner peripheral surface of the columnar portion 2 bulges in this manner, the roundness of the seat taper portion 3 varies. Therefore, when the tapered portion 3 is used as a sheet surface, a gap is formed between the tapered portion 3 and the poppet member, and the operating oil may leak therefrom. An object of the present invention is to provide a cutting tool capable of improving the roundness of a tapered portion.
【０００８】[0008]
【課題を解決するための手段】この発明は、下端を縮径
させた棒部材からなり、その縮径部に、棒部材の軸線と
平行に設けた複数の第１切刃と、縮径部によって形成さ
れる段部を傾斜させ、そこに設けた複数の第２切刃と、
棒部材の径方向に形成し、第１切刃と第２切刃との間に
介在させた逃げ溝とを備え、この棒部材を軸線を中心と
して回転させながら被加工体側に移動させて、この被加
工体に、第１切刃によって、円柱部を加工し、さらに、
第２切刃によって、円柱部の開口端を拡径させたテーパ
部を加工する構成にした切削工具を前提とする。そし
て、第１の発明は、上記複数の第１切刃のうち、少なく
とも一つの第１切刃の長さを長くして第３切刃を構成
し、この第３切刃の上端を、上記逃げ溝よりも上方に位
置させた点に特徴を有する。第２の発明は、第１の発明
において、第３切刃と第２切刃との間には、棒部材の軸
方向に形成した逃げ溝を介在させた点に特徴を有する。According to the present invention, there is provided a rod member having a reduced diameter at a lower end, a plurality of first cutting blades provided in parallel with an axis of the rod member at the reduced diameter portion, and a reduced diameter portion. A plurality of second cutting blades provided on the stepped portion formed by tilting the stepped portion,
A relief groove formed in the radial direction of the rod member and provided between the first cutting blade and the second cutting blade is provided, and the rod member is moved toward the workpiece while rotating about the axis, A cylindrical portion is processed on the workpiece by the first cutting blade.
It is assumed that the cutting tool has a configuration in which the second cutting edge is used to machine a tapered portion in which the diameter of the opening end of the cylindrical portion is enlarged. In the first invention, among the plurality of first cutting blades, at least one of the first cutting blades is lengthened to form a third cutting edge, and the upper end of the third cutting edge is The feature is that it is located above the relief groove. The second invention is characterized in that, in the first invention, a relief groove formed in the axial direction of the rod member is interposed between the third cutting blade and the second cutting blade.
【０００９】[0009]
【発明の実施の形態】図１に示す実施例の切削工具で
は、上記複数の第１切刃８のうち第１切刃８ａの長さを
上方に向かって長くして、それを第３切刃１３としてい
る。したがって、この第３切刃１３の上端は、逃げ溝１
２よりも上方に位置することになる。ただし、この第３
切刃１３を長くしたぶんだけ、第２切刃１１のうち第２
切刃１１ａは短くなる。そして、これら第３切刃１３と
第２切刃１１ａとの間には、棒部材５の軸方向に形成し
た逃し溝１２ａを介在させている。なお、その他の構成
については、上記従来例の切削工具とまったく同じなの
で、同一の構成要素については同一の符号を付し、その
詳細な説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the cutting tool of the embodiment shown in FIG. 1, the length of the first cutting edge 8a of the plurality of first cutting edges 8 is increased upward, and the length of the first cutting edge 8a is increased. The blade 13 is used. Therefore, the upper end of the third cutting edge 13 is
It will be located above 2. However, this third
As long as the cutting edge 13 is lengthened, the second cutting edge 11
The cutting edge 11a becomes shorter. A relief groove 12a formed in the axial direction of the rod member 5 is interposed between the third cutting edge 13 and the second cutting edge 11a. The other components are exactly the same as those of the above-described conventional cutting tool. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００１０】このようにした切削工具は、従来例と同
様、棒部材５の軸線Ｓを中心として回転しながら、バル
ブボディ１側に移動する。このとき、まず、第１切刃８
と第３切刃１３とによって、円柱部２を加工する。した
がって、バルブボディ１には半径ｒの円柱部が形成され
ることになる。さらに、この切削工具がバルブボディ１
側に移動すると、第２切刃１１がバルブボディ１に当接
して、テーパ部３を加工する。したがって、バルブボデ
ィ１には角度θだけ傾斜させたテーパ部３が形成される
ことになる。The cutting tool moves toward the valve body 1 while rotating about the axis S of the rod member 5 as in the conventional example. At this time, first, the first cutting edge 8
The cylindrical portion 2 is processed by the third cutting blade 13. Accordingly, a column having a radius r is formed in the valve body 1. Furthermore, this cutting tool is the valve body 1
When it moves to the side, the second cutting edge 11 abuts on the valve body 1 to process the tapered portion 3. Therefore, the tapered portion 3 inclined by the angle θ is formed in the valve body 1.
【００１１】このとき、前述したように、円柱部２内に
位置する逃げ溝１２に、第２切刃１１が押し付けられて
いるテーパ部３の内側の肉が逃げてしまう。しかし、切
削工具は回転しているので、これら逃げ溝１２よりも上
方まで位置させた第３切刃１３によって、この肉を切削
し、除去することができる。また、第２切刃１１ａは、
その一部だけしか残っていないが、その他の第２切刃１
１によってテーパ部３を加工するので、例えば、逃げ溝
１２ａ内に肉が残ってしまうようなことはない。At this time, as described above, the meat inside the tapered portion 3 against which the second cutting edge 11 is pressed escapes into the escape groove 12 located in the cylindrical portion 2. However, since the cutting tool is rotating, the meat can be cut and removed by the third cutting edge 13 positioned above the clearance groove 12. In addition, the second cutting blade 11a
Although only a part of it remains, the other second cutting edge 1
Since the taper portion 3 is processed by the step 1, there is no possibility that, for example, the meat remains in the escape groove 12a.
【００１２】そして、テーパ部３を加工したら、この切
削工具をバルブボディ１から引き抜いて、穴４の加工を
終了することになる。このとき、前述したように、逃げ
溝１２に逃げた肉は第３切刃１３によってすでに除去さ
れているので、切削工具を引き抜く力によってテーパ部
３側に押し戻されることはなく、テーパ部３の内側がふ
くらんでしまうことはない。When the tapered portion 3 has been machined, the cutting tool is pulled out of the valve body 1 and the machining of the hole 4 is completed. At this time, as described above, since the flesh escaping to the escape groove 12 has already been removed by the third cutting edge 13, the meat is not pushed back to the taper portion 3 side by the pulling-out force of the cutting tool. The inside doesn't bulge.
【００１３】以上述べた実施例の切削工具では、テーパ
部３の内側がふくらんだり、円柱部２の内周面がふくら
んだりすることがなく、テーパ部３の真円度を向上させ
ることができる。したがって、このテーパ部３をシート
面としたとき、ポペット部材との間に隙間ができること
はなく、漏れのないシート面を得ることができる。な
お、この実施例では、チェックバルブのシート面を加工
しているが、円柱部２とその開口端を傾斜させたテーパ
部３とを有する穴４を形成するものであれば、シート面
に限らず、この切削工具を使用することができる。ま
た、第１〜３切刃８、１１、１３の数は、切削工具のバ
ランスや被加工体の硬度などに応じて自由に決めればよ
い。In the cutting tool of the embodiment described above, the inside of the tapered portion 3 does not bulge, and the inner peripheral surface of the cylindrical portion 2 does not bulge, so that the roundness of the tapered portion 3 can be improved. . Therefore, when the tapered portion 3 is used as a sheet surface, no gap is formed between the tapered portion 3 and the poppet member, and a sheet surface without leakage can be obtained. In this embodiment, the seat surface of the check valve is machined. However, as long as the hole 4 having the cylindrical portion 2 and the tapered portion 3 having the opening end inclined is formed, the seat surface is limited. Instead, this cutting tool can be used. The number of the first to third cutting edges 8, 11, 13 may be freely determined according to the balance of the cutting tool, the hardness of the workpiece, and the like.
【００１４】[0014]
【発明の効果】第１の発明では、逃げ溝に逃げた肉を、
第３切刃によって切削し、除去することができる。した
がって、切削工具を被加工体から引き抜くとき、テーパ
部の内側や、円柱部の内周面がふくらんでしまうことは
ない。このように、加工の際にテーパ部の内側や円柱部
の内周面がふくらんでしまうことがなく、テーパ部の真
円度を向上させることができる。したがって、例えば、
このテーパ部をシート面としたとき、ポペット部材との
間に隙間ができることはなく、漏れのないシート面を得
ることができる。第２の発明では、第１の発明におい
て、第３切刃と第２切刃との間にも逃げ溝を確保するこ
とができる。しかも、この逃げ溝を棒部材の軸方向に形
成したので、例えば、この逃げ溝内に肉が残ってしまっ
たようなときでも、その肉を、その他の第２切刃によっ
て切削し、除去することができる。According to the first aspect, the meat escaping into the escape groove is
It can be cut and removed by the third cutting edge. Therefore, when the cutting tool is pulled out of the workpiece, the inside of the tapered portion and the inner peripheral surface of the cylindrical portion do not bulge. As described above, the roundness of the tapered portion can be improved without the inside of the tapered portion and the inner peripheral surface of the columnar portion bulging during processing. So, for example,
When the tapered portion is used as a sheet surface, no gap is formed between the tapered portion and the poppet member, and a sheet surface without leakage can be obtained. According to the second aspect, in the first aspect, an escape groove can be secured between the third cutting edge and the second cutting edge. In addition, since the clearance groove is formed in the axial direction of the rod member, even when, for example, the meat remains in the clearance groove, the meat is cut and removed by another second cutting blade. be able to.
【図１】この発明の実施例の切削工具の断面図である。FIG. 1 is a sectional view of a cutting tool according to an embodiment of the present invention.
【図２】円柱部２とその開口端を傾斜させたテーパ部３
とを有する穴４を示す断面図である。FIG. 2 shows a cylindrical portion 2 and a tapered portion 3 having its open end inclined.
FIG. 4 is a cross-sectional view showing a hole 4 having
【図３】従来例の切削工具を示し、(ａ)は断面図で、
(ｂ)は下方から見た図である。FIG. 3 shows a conventional cutting tool, and (a) is a sectional view,
(b) is a diagram viewed from below.
【図４】従来例の切削工具によって、円柱部２とテーパ
部３とを加工している状態を示す図である。FIG. 4 is a diagram showing a state in which a cylindrical portion 2 and a tapered portion 3 are being machined by a conventional cutting tool.
【図５】従来例の切削工具をバルブボディ１から引き抜
いた状態を示す図である。FIG. 5 is a view showing a state in which a cutting tool of a conventional example is pulled out from a valve body 1.
１ バルブボディ ２ 円柱部 ３ テーパ部 ４ 穴 ５ 棒部材 ６ 縮径部 ８、８ａ 第１切刃 ９ 段部 １１、１１ａ 第２切刃 １２、１２ａ 逃げ溝 １３ 第３切刃 DESCRIPTION OF SYMBOLS 1 Valve body 2 Cylindrical part 3 Taper part 4 Hole 5 Bar member 6 Reduced diameter part 8, 8a 1st cutting blade 9 Step part 11, 11a 2nd cutting blade 12, 12a Relief groove 13 3rd cutting blade
Claims (2)
縮径部に、棒部材の軸線と平行に設けた複数の第１切刃
と、縮径部によって形成される段部を傾斜させ、そこに
設けた複数の第２切刃と、棒部材の径方向に形成し、第
１切刃と第２切刃との間に介在させた逃げ溝とを備え、
この棒部材を軸線を中心として回転させながら被加工体
側に移動させて、この被加工体に、第１切刃によって、
円柱部を加工し、さらに、第２切刃によって、円柱部の
開口端を拡径させたテーパ部を加工する構成にした切削
工具において、上記複数の第１切刃のうち、少なくとも
一つの第１切刃の長さを長くして第３切刃を構成し、こ
の第３切刃の上端を、上記逃げ溝よりも上方に位置させ
たことを特徴とする切削工具。1. A bar member having a reduced diameter at a lower end, a plurality of first cutting blades provided in parallel with an axis of the rod member at a reduced diameter portion, and a step formed by the reduced diameter portion is inclined. A plurality of second cutting blades provided therein, and a relief groove formed in the radial direction of the rod member and interposed between the first cutting blade and the second cutting blade,
The rod member is moved toward the workpiece while rotating about the axis, and the workpiece is moved to the workpiece by the first cutting blade.
In a cutting tool configured to machine a cylindrical portion and further machine a tapered portion in which the opening end of the cylindrical portion is enlarged by a second cutting blade, at least one of the plurality of first cutting blades may be used. A cutting tool wherein a length of one cutting edge is increased to form a third cutting edge, and an upper end of the third cutting edge is positioned above the clearance groove.
の軸方向に形成した逃げ溝を介在させたことを特徴とす
る請求項１記載の切削工具。2. The cutting tool according to claim 1, wherein an escape groove formed in the axial direction of the rod member is interposed between the third cutting edge and the second cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25400096A JP3662684B2 (en) | 1996-09-05 | 1996-09-05 | Cutting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25400096A JP3662684B2 (en) | 1996-09-05 | 1996-09-05 | Cutting tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1080803A true JPH1080803A (en) | 1998-03-31 |
| JP3662684B2 JP3662684B2 (en) | 2005-06-22 |
Family
ID=17258876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25400096A Expired - Fee Related JP3662684B2 (en) | 1996-09-05 | 1996-09-05 | Cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3662684B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372670A (en) * | 2012-04-27 | 2013-10-30 | 上海华迅汽车配件有限公司 | Tool for processing mechanical parts and processing method thereof |
| JP2015136788A (en) * | 2014-01-22 | 2015-07-30 | ザ・ボーイング・カンパニーＴｈｅＢｏｅｉｎｇ Ｃｏｍｐａｎｙ | Systems and methods for forming opening in stack |
| JPWO2020031259A1 (en) * | 2018-08-07 | 2020-08-20 | 住友電工ハードメタル株式会社 | Drill |
-
1996
- 1996-09-05 JP JP25400096A patent/JP3662684B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372670A (en) * | 2012-04-27 | 2013-10-30 | 上海华迅汽车配件有限公司 | Tool for processing mechanical parts and processing method thereof |
| JP2015136788A (en) * | 2014-01-22 | 2015-07-30 | ザ・ボーイング・カンパニーＴｈｅＢｏｅｉｎｇ Ｃｏｍｐａｎｙ | Systems and methods for forming opening in stack |
| JPWO2020031259A1 (en) * | 2018-08-07 | 2020-08-20 | 住友電工ハードメタル株式会社 | Drill |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3662684B2 (en) | 2005-06-22 |
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