JP3398012B2 - Rotary cutting tool - Google Patents
Rotary cutting toolInfo
- Publication number
- JP3398012B2 JP3398012B2 JP13938697A JP13938697A JP3398012B2 JP 3398012 B2 JP3398012 B2 JP 3398012B2 JP 13938697 A JP13938697 A JP 13938697A JP 13938697 A JP13938697 A JP 13938697A JP 3398012 B2 JP3398012 B2 JP 3398012B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cutting tool
- rotary
- rotary cutting
- cutting edge
- 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 - Lifetime
Links
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、回転動作を行う
支持部材に固定され、案内された加工物の先端部を切刃
に当接して円錐状に切削加工する回転切削工具に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cutting tool which is fixed to a supporting member which performs a rotary operation and which guides a tip end of a workpiece to a cutting edge to perform a conical cutting.
【０００２】[0002]
【従来の技術】従来、金属棒等の加工物の先端部を円錐
状に切削加工する場合には、回転保持する加工物にバイ
トを当接し、このバイトを仕上げ面と同一の勾配でスラ
イドさせながら切削していた。2. Description of the Related Art Conventionally, when cutting the tip of a work piece such as a metal rod into a conical shape, a turning tool is brought into contact with the work piece to be rotated and slid at the same slope as the finished surface. While cutting.
【０００３】又、バイト自体が回転しながら切削加工す
る装置としては、例えば特開平３−２０２２０１号公報
に記載される回転切削機が提案されている。この回転切
削機は、内部の切削加工用空間に案内された金属棒を回
転中心として回転動作を行うバイト支持部材と、バイト
支持部材に固定され金属棒を切削する刃先部が切削加工
用空間に突出して配置された複数のバイトを有し、各バ
イトの刃先部は、金属棒の先端部が切削されるべき円錐
面の表面に位置するよう回転軸方向に沿って配置された
ものであった。As a device for cutting while the cutting tool itself rotates, for example, a rotary cutting machine disclosed in Japanese Patent Laid-Open No. 3-202201 has been proposed. This rotary cutting machine has a tool support member that rotates about a metal rod guided in the internal machining space as a center of rotation, and a cutting edge part that is fixed to the tool support member and cuts the metal rod into the machining space. It had a plurality of cutting tools arranged in a protruding manner, and the cutting edge of each cutting tool was arranged along the axis of rotation so that the tip of the metal rod was located on the surface of the conical surface to be cut. .
【０００４】この回転切削機において金属棒は支持台に
固定されており、スピンドルの回転により複数のバイト
がスライド台の前進動作に伴って金属棒を先端から円錐
状に回転切削加工していた。又バイトは、金属棒の軸線
方向に沿って段階的にずれた位置に配置され、各列では
放射状に等間隔で配置されていた。In this rotary cutting machine, the metal rod is fixed to the supporting base, and a plurality of cutting tools are rotationally cutting the metal rod into a conical shape from the tip end with the forward movement of the slide base by the rotation of the spindle. Further, the cutting tools were arranged at positions shifted stepwise along the axial direction of the metal rod, and were arranged radially at equal intervals in each row.
【０００５】金属棒の外周面には同列のバイトの切刃部
が同時に切削加工に寄与するのでバイト1本当たりの切
削量が平均化する効果があった。又、金属棒を回転する
複数のバイトの刃先部列に挿入することにより順次切削
に寄与するバイト数を増加させて加工時間を短縮化して
いた。Since the cutting edges of the cutting tools in the same row simultaneously contribute to the cutting process on the outer peripheral surface of the metal rod, there is an effect that the cutting amount per cutting tool is averaged. Further, by inserting the metal rod into the row of blade tips of a plurality of rotating cutting tools, the number of cutting tools contributing to the cutting is sequentially increased and the processing time is shortened.
【０００６】[0006]
【発明が解決しようとする課題】しかし、回転保持する
加工物にバイトを当接する従来の切削方法では、加工物
の固定が完全でないと加工中に加工物がバイトと逆方向
に逃げる恐れがあり、特に小物の場合に精度が悪くなる
傾向があった。又、先端部を丸く加工する場合にビビリ
等が発生して加工物が折れてしまう恐れがあった。However, in the conventional cutting method in which the bite is brought into contact with the workpiece to be rotated and held, if the workpiece is not fixed completely, the workpiece may escape in the opposite direction to the bite during machining. , The accuracy tended to deteriorate, especially for small items. Further, when the tip end is processed into a round shape, chattering or the like may occur and the processed product may be broken.
【０００７】又、従来の回転切削機の場合は、複数列の
バイト刃先部で加工するため、多数の刃先部を所定位置
に固定する作業が煩雑であり、又加工物に正確なテーパ
ー角度を実現することも困難であった。又、小物の加工
には適しておらず、先端部に丸みをつけて切削すること
もできなかった。Further, in the case of the conventional rotary cutting machine, since a plurality of rows of cutting edge portions are used for machining, the work of fixing a large number of cutting edge portions at predetermined positions is complicated, and an accurate taper angle can be applied to the workpiece. It was also difficult to realize. In addition, it was not suitable for processing small items, and it was not possible to round the tip and cut it.
【０００８】この発明は上記課題を解決し、切削工具の
取付・取外し作業が容易で、切削中に加工物が移動する
恐れもなく、加工精度を長時間保つことができ、小物の
加工物であっても正確なテーパー角度が得られる回転切
削工具を提供することを目的としている。又、円錐の先
端部に丸みをつける切削加工が容易にでき、しかも刃物
角が９０度で、すくい角及び逃げ角が０度であっても切
削可能な回転切削工具を提供することも目的としてい
る。The present invention solves the above-mentioned problems, and the work of attaching / removing a cutting tool is easy, there is no fear that the work piece will move during cutting, and the machining accuracy can be maintained for a long time. The object is to provide a rotary cutting tool that can obtain an accurate taper angle even if it exists. It is also an object of the present invention to provide a rotary cutting tool that can easily perform a cutting process for rounding the tip of a cone, and can cut even if the blade angle is 90 degrees and the rake angle and the clearance angle are 0 degrees. There is.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するた
め、この発明の回転切削工具は、回転動作を行う支持部
材に固定され、案内された加工物を切刃に当接して円錐
状に切削加工する回転切削工具において、前記回転切削
工具は、1本の棒状部材の先端部を加工し点対称配置で
一体に形成する２枚１組の刃先を有し、対向する切刃は
軸方向に仕上げ面と同一の勾配で傾斜し、各すくい面は
対向する切刃の棒状部材の基部方向に接近する逃げ面延
長部と交差する切屑排出用の部分を有することを特徴と
している。又請求項２記載の回転切削工具は、刃先の切
刃交差部が曲線で接続し、刃物角が９０度で、すくい角
及び逃げ角が０度であることを特徴とするものである。In order to solve the above-mentioned problems, a rotary cutting tool of the present invention is fixed to a supporting member that performs a rotary operation, and a guided workpiece is brought into contact with a cutting edge to cut into a conical shape. In the rotary cutting tool to be processed, the rotary cutting
The tool has a set of two cutting edges that are integrally formed in a point-symmetrical arrangement by processing the tip of one rod-shaped member, and the opposing cutting edges are inclined in the same gradient as the finished surface in the axial direction, Each rake face
It is characterized by having a portion of the chip for discharging intersecting the flank extension approaching proximally of the opposing cutting edge of the rod. A rotary cutting tool according to a second aspect of the present invention is characterized in that the cutting edge intersections of the cutting edges are connected by a curve, the blade angle is 90 degrees, and the rake angle and the clearance angle are 0 degrees.
【００１０】この回転切削工具は、支持部材に固定され
る二枚刃を回転させながら前進し、切削加工用空間に挿
入する固定された加工物を対向する切刃が保持する格好
で切削するため、加工物の倒れが生ぜず安定した切削が
可能となる。従って円錐断面の真円の精度が高く、又仕
上げ面のテーパー角度は切刃の角度と一致するためばら
つきが生じない。This rotary cutting tool moves forward while rotating the two blades fixed to the support member, and cuts the fixed workpiece to be inserted into the space for cutting by the cutting edge held by the opposing cutting blade. , Stable cutting is possible without the work piece falling over. Therefore, the accuracy of the true circle of the conical section is high, and the taper angle of the finished surface matches the angle of the cutting edge, so that there is no variation.
【００１１】一方のすくい面に設ける切屑排出用の部分
は他方の切刃の逃げ面延長部と交差することになるが、
この逃げ面延長部の形状を切屑がスムーズに排出される
よう曲面を形成する。The chip discharging portion provided on one rake face intersects with the flank extension of the other cutting edge.
A curved surface is formed in the shape of the flank extension so that chips can be discharged smoothly.
【００１２】又、刃先の切刃交差部を曲線で接続するこ
とにより、二枚刃を前進させるだけで円錐の先端部に丸
みをつけることができる。又対向する切刃が加工物を挟
持しながら端部より順次切削していくので刃物角が９０
度、すくい角及び逃げ角が０度でも切削可能となる。Further, by connecting the intersecting portions of the cutting edges with a curved line, the tip of the cone can be rounded by simply advancing the two blades. Also, the opposing cutting blades sequentially cut from the end while sandwiching the workpiece, so the blade angle is 90
Even if the degree, the rake angle and the clearance angle are 0 degree, it is possible to cut.
【００１３】[0013]
【発明の実施の形態】次にこの発明の実施の形態を添付
図面に基づき詳細に説明する。図１はこの発明の回転切
削工具の斜視図、図２は同平面図、図３は同正面図、図
４は同左側面図、図５は切削加工状態を示す断面図であ
る。回転切削工具１は、１本の丸型棒状部材２の先端部
を加工したバイトであって、２枚１組の刃先３，３を点
対称配置で一体に形成する。この対向する切刃４，４は
軸方向に仕上げ面と同一の勾配で傾斜しており、その切
刃交差部４ａは曲線で接続し、すくい面５は棒状部材２
の基部方向に向かって切屑排出用の部分５ａを有する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 is a perspective view of a rotary cutting tool of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, FIG. 4 is a left side view thereof, and FIG. 5 is a sectional view showing a cutting state. The rotary cutting tool 1 is a cutting tool obtained by processing the tip of one round rod-shaped member 2 and integrally forms two pairs of cutting edges 3 and 3 in a point symmetrical arrangement. The facing cutting blades 4 and 4 are inclined in the axial direction at the same gradient as the finished surface, the cutting blade intersecting portions 4a are connected by a curved line, and the rake surface 5 is a bar-shaped member 2.
Has a portion 5a for discharging chips in the direction of the base of the.
【００１４】又刃先３の刃物角はβ＝９０度で、すくい
面５のすくい角及び逃げ面６の逃げ角は０度となる。一
方の切屑排出用の部分５ａは他方の切刃４の逃げ面延長
部６ａと交差することになるが、切屑がスムーズに排出
されるよう逃げ面延長部６ａの形状を曲面で形成する。The blade angle of the cutting edge 3 is β = 90 degrees, and the rake angle of the rake surface 5 and the clearance angle of the flank surface 6 are 0 degrees. One chip discharging portion 5a intersects with the flank extension 6a of the other cutting blade 4, but the flank extension 6a is formed into a curved surface so that the chips can be discharged smoothly.
【００１５】この回転切削工具１は、図示しないモータ
に接続するスピンドル７の支持部材８に固定されて回転
し、又図示しないスライド台の操作により前進・後退動
作を行う。一方金属棒等の加工物９は支持台１０に固定
されており、スライド台の前進動作に伴って加工物９を
切削加工用空間に案内し、先端から切刃４に当接して円
錐状に切削加工する。The rotary cutting tool 1 is fixed to a supporting member 8 of a spindle 7 connected to a motor (not shown) to rotate, and is moved forward / backward by operating a slide base (not shown). On the other hand, the work piece 9 such as a metal rod is fixed to the support base 10, and the work piece 9 is guided into the cutting space along with the forward movement of the slide base, and comes into contact with the cutting edge 4 from the tip to form a conical shape. Cutting process.
【００１６】この時切刃交差部４ａが曲線で接続されて
いるため、回転切削工具１を前進させるだけで円錐の先
端部に丸みをつけることができる。又対向する切刃４，
４が加工物９を挟持しながら端部より順次切削していく
ので、すくい角及び逃げ角が０度でも切削可能となる。
このため、回転切削工具１自体の製作が容易になる上、
衝撃に対する保護や切削熱の発散等を考慮する上で有利
となる。At this time, since the cutting edge intersecting portion 4a is connected by a curved line, the tip of the cone can be rounded only by advancing the rotary cutting tool 1. The opposite cutting edge 4,
4 sequentially cuts from the end while sandwiching the workpiece 9, so that it is possible to cut even if the rake angle and the clearance angle are 0 degrees.
Therefore, in addition to facilitating the production of the rotary cutting tool 1 itself,
This is advantageous in consideration of protection against impact and dissipation of cutting heat.
【００１７】又、回転切削工具１の前進・後退のみで高
速回転による切削加工が行えるので、より早くより精度
のある加工物９を得られる。なお、回転切削工具１の刃
先３の材質には超硬材、天然ダイヤモンド、コンパック
ス材を使用する。又、切刃４のテーパー角度θは２０度
から４０度が望ましい。Further, since the cutting work by the high speed rotation can be carried out only by advancing / retreating the rotary cutting tool 1, the work piece 9 can be obtained more quickly and more accurately. The material of the cutting edge 3 of the rotary cutting tool 1 is cemented carbide, natural diamond or Compax material. The taper angle θ of the cutting edge 4 is preferably 20 to 40 degrees.
【００１８】[0018]
【発明の効果】以上説明したように、この発明の回転切
削工具は、点対称配置で一体に形成する２枚１組の刃先
を有し、対向する切刃を仕上げ面と同一の勾配で傾斜さ
せるので、回転切削工具を前進させるだけで円錐状の切
削加工が行える。又加工物を対向する切刃が保持する格
好で切削するため、小物の加工物であっても加工物の倒
れが生ぜず安定した切削が可能となる。従って円錐断面
の真円の精度が高く、仕上げ面のテーパー角度は切刃の
角度と一致するため加工物の寸法精度を長時間保つこと
ができ、ばらつきも生じない。As described above, the rotary cutting tool of the present invention has a pair of cutting edges integrally formed in a point-symmetrical arrangement, and the opposing cutting edges are inclined at the same gradient as the finished surface. Therefore, the conical cutting can be performed only by advancing the rotary cutting tool. Further, since the workpiece is cut by holding the opposing cutting edges, even a small workpiece can be stably cut without the workpiece falling. Therefore, the accuracy of the true circle of the conical cross section is high, and the taper angle of the finished surface matches the angle of the cutting edge, so that the dimensional accuracy of the workpiece can be maintained for a long time and no variation occurs.
【００１９】又回転切削工具はその軸心を加工物の軸心
に一致させるだけでよいので取付・取外し作業も容易に
なる。各すくい面は切刃交差部より棒状部材の基部に向
かって切屑排出用の部分を有するので、切屑がスムーズ
に排出される。Further, since the rotary cutting tool only has to have its axis aligned with the axis of the workpiece, the work of mounting / removing becomes easy. Since each rake face has a portion for discharging chips from the intersection of the cutting edges toward the base of the rod-shaped member, chips are smoothly discharged.
【００２０】又請求項２記載の回転切削工具は、刃先の
切刃交差部を曲線で接続するので、二枚刃を前進させる
だけで円錐の先端部に丸みを容易につけることができ
る。又対向する切刃が加工物を挟持しながら端部より順
次切削していくので刃物角が９０度、すくい角及び逃げ
角が０度でも切削可能となる。In the rotary cutting tool according to the second aspect, since the cutting edge intersections of the cutting edges are connected by a curved line, the tip of the cone can be easily rounded by simply moving the two blades forward. Further, since the opposing cutting blades sequentially cut the workpiece while sandwiching the workpiece, it is possible to perform cutting even if the blade angle is 90 degrees and the rake angle and the clearance angle are 0 degrees.
【００２１】[0021]
【図１】回転切削工具の斜視図である。FIG. 1 is a perspective view of a rotary cutting tool.
【図２】回転切削工具の平面図である。FIG. 2 is a plan view of a rotary cutting tool.
【図３】回転切削工具の正面図である。FIG. 3 is a front view of a rotary cutting tool.
【図４】回転切削工具の左側面図である。FIG. 4 is a left side view of the rotary cutting tool.
【図５】回転切削工具の切削加工状態を示す断面図であ
る。FIG. 5 is a cross-sectional view showing a cutting state of a rotary cutting tool.
１ 回転切削工具 ２ 棒状部材 ３ 刃先 ４ 切刃 ４ａ 切刃交差部 ５ すくい面 ５ａ 切屑排出用の部分 ６ 逃げ面 1 rotary cutting tool 2 bar members 3 cutting edge 4 cutting edges 4a Cutting edge intersection 5 rake face 5aPart for discharging chips 6 flank
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−256467（ＪＰ，Ａ) 特開 平２−108473（ＪＰ，Ａ) 実開 平２−97978（ＪＰ，Ｕ) 特許75392（ＪＰ，Ｃ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B23B 27/00 - 27/22 B23B 5/00 B23K 11/30 530 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-256467 (JP, A) JP-A-2-108473 (JP, A) Actually open 2-97978 (JP, U) Patent 75392 (JP, C1) (58) Fields investigated (Int.Cl. 7 , DB name) B23B 27/00-27/22 B23B 5/00 B23K 11/30 530
Claims (2)
内された加工物を切刃に当接して円錐状に切削加工する
回転切削工具において、前記回転切削工具は、1本の棒
状部材の先端部を加工し点対称配置で一体に形成する２
枚１組の刃先を有し、対向する切刃は軸方向に仕上げ面
と同一の勾配で傾斜し、各すくい面は対向する切刃の棒
状部材の基部方向に接近する逃げ面延長部と交差する切
屑排出用の部分を有することを特徴とする回転切削工
具。1. A fixed to the support member for rotational operation, the rotary cutting tool for cutting a guided workpiece contact with conically cutting, the rotary cutting tool of one of the rod-like member The tip is processed to form a unit with a point-symmetrical arrangement 2
It has one set of cutting edges, the opposing cutting edges are inclined in the axial direction at the same gradient as the finished surface, and each rake surface is the rod of the opposing cutting edge.
Rotating cutting tool and having a portion for chip discharge intersecting the flank extension approaching proximally of Jo member.
し、刃物角が９０度で、すくい角及び逃げ角が０度であ
ることを特徴とする請求項１記載の回転切削工具。2. The rotary cutting tool according to claim 1, wherein the cutting edge has curved cutting edge intersections, a cutting edge angle of 90 degrees, and a rake angle and a clearance angle of 0 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13938697A JP3398012B2 (en) | 1997-05-14 | 1997-05-14 | Rotary cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13938697A JP3398012B2 (en) | 1997-05-14 | 1997-05-14 | Rotary cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10315009A JPH10315009A (en) | 1998-12-02 |
| JP3398012B2 true JP3398012B2 (en) | 2003-04-21 |
Family
ID=15244109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13938697A Expired - Lifetime JP3398012B2 (en) | 1997-05-14 | 1997-05-14 | Rotary cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3398012B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317168B (en) * | 2012-03-20 | 2017-01-25 | 上海嘉捷通电路科技股份有限公司 | Drilling tool for processing annular groove |
-
1997
- 1997-05-14 JP JP13938697A patent/JP3398012B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10315009A (en) | 1998-12-02 |
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