JPS60114402A - Tip for cutting tool and its grinding method - Google Patents

Tip for cutting tool and its grinding method

Info

Publication number
JPS60114402A
JPS60114402A JP21896583A JP21896583A JPS60114402A JP S60114402 A JPS60114402 A JP S60114402A JP 21896583 A JP21896583 A JP 21896583A JP 21896583 A JP21896583 A JP 21896583A JP S60114402 A JPS60114402 A JP S60114402A
Authority
JP
Japan
Prior art keywords
cutting edge
cutting tool
curvature
radius
tool tip
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
JP21896583A
Other languages
Japanese (ja)
Inventor
Yasuo Saito
保夫 斎藤
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.)
Tungaloy Corp
Original Assignee
Toshiba Tungaloy 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 Toshiba Tungaloy Co Ltd filed Critical Toshiba Tungaloy Co Ltd
Priority to JP21896583A priority Critical patent/JPS60114402A/en
Publication of JPS60114402A publication Critical patent/JPS60114402A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B27/00Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/005Geometry of the chip-forming or the clearance planes, e.g. tool angles

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

PURPOSE:To improve finish of cutting by making a flank a curved surface and forming a cutting edge in a part of an oval curve relating to the radius of curvature of the flank in the longitudinal direction. CONSTITUTION:A flank 2 is formed in an arc face whose radius of curvature is 50-100mm.. And a cutting edge 4 formed on the boundary between the flank 2 and an upper face 3 is formed by a cutting edge composite body 5 consisting of a cutting edge layer 6 and a base metal 7 so that the cutting edge 4 becomes a part of an oval which is corresponding to 200-800mm. in conversion of radius of curvature. By this construction, the phenomemon of sticky movement is decreased and finishing is improved.

Description

【発明の詳細な説明】 本発明は、切削工具用チップおよびその研削方法に関し
、特にその切刃稜が仕上げ切削に好適するように改善し
たものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting tool tip and a method for grinding the same, and in particular, the cutting edge of the tip is improved so that it is suitable for finish cutting.

従来、仕上げ切削に利用した切刃稜を有する切削工具用
のチップとしては、例えば特公昭47−49861号公
報、特公昭49−31517号公報、米国特許第429
4565号明細書等にみられるものが開示されている。
Conventionally, tips for cutting tools having cutting edges used for finishing cutting include, for example, Japanese Patent Publication No. 47-49861, Japanese Patent Publication No. 49-31517, and U.S. Patent No. 429.
4565 specification etc. is disclosed.

これらは切刃チップのすくい面又は逃げ面に円筒面乃至
円錐面が付加されることによって、曲率半径の大きい円
弧切刃稜が形成されるものである。
These have a cylindrical or conical surface added to the rake face or flank face of the cutting tip to form an arcuate cutting edge with a large radius of curvature.

したがって、これらの円弧切刃稜が正確にしかも確実に
研削されていれば直線切刃稜に対するよりもびびり振動
が減少して、仕上げ面粗さの面で相当の効果を発揮する
ものである。しかしながら円筒面乃至円錐面が研削され
るにあたっては、大きな回転半径を有するため、研削時
の取付は剛性が低下し、結果的に切刃稜の刃立ちが悪く
なっていた。
Therefore, if these arcuate cutting edge edges are ground accurately and reliably, chatter vibration will be reduced compared to the straight cutting edge edge, and this will have a considerable effect on the finished surface roughness. However, when a cylindrical or conical surface is ground, since it has a large rotation radius, the rigidity of the mounting during grinding is reduced, resulting in poor cutting edge sharpness.

このようなことから、仕上げ切削に好適する切刃稜が、
正確にしかも確実に研削されるようにした切削工具用チ
ップおよびその研削方法の開発が要望されている。
For this reason, the cutting edge that is suitable for finish cutting is
There is a need for the development of a cutting tool tip that can be ground accurately and reliably, and a method for grinding the same.

本発明は上述の点に鑑みなされたもので、外郭側面の一
部又は全部が、逃げ面として形成され、しかもその上面
との境界稜線が略円弧状の切刃稜として研削形成される
ようにした多角形板状の切削工具用チップにおいて、そ
の切刃構成およびその研削方法を改善することによって
、刃立ちの良好な楕円状の切刃稜が得られるようにした
ものである。
The present invention has been made in view of the above-mentioned points, and is such that part or all of the outer side surface is formed as a flank surface, and the boundary ridge line with the upper surface is ground and formed as a substantially arc-shaped cutting edge ridge. In the polygonal plate-shaped cutting tool tip, an elliptical cutting edge with a good edge edge can be obtained by improving the cutting edge configuration and the grinding method.

以下、本発明切削工具用チップにおける一実施例につい
て図を参照しながら説明する。
Hereinafter, one embodiment of the cutting tool tip of the present invention will be described with reference to the drawings.

第1図乃至第3図において、(1)は、多角形板状をな
す切削工具用チップであり、その−側部には逃げ角αを
有する逃げ面(2)が形成されている。そして、この逃
げ面(2)は、従来みられる直線的なものと異って曲率
半径Rを有する円弧面により形成される。この場合、曲
率半径は通常50〜1ooseの5頁 範囲内で設定される。
In FIGS. 1 to 3, (1) is a polygonal plate-shaped cutting tool tip, and a flank (2) having a clearance angle α is formed on the negative side thereof. The flank (2) is formed by an arcuate surface having a radius of curvature R, unlike a conventional straight face. In this case, the radius of curvature is usually set within a range of 5 pages to 1 oose.

また、この逃げ面(2)および上面(3)によりその境
界稜線として形成される切刃稜(4)は、前述した曲率
半径Rに基いた楕円の一部により形成される。
Further, the cutting edge ridge (4) formed as a boundary ridge line between the flank surface (2) and the upper surface (3) is formed by a part of an ellipse based on the radius of curvature R described above.

これは、円柱が斜截されたときにみられる楕円を想定す
れば理解できるものである。そして、この切刃稜(4)
の楕円は、曲率半径に換算すれば200〜800朋程度
のものである。したがって、従来みられた円弧切刃稜が
200〜300朋であったのに対し、相当大きなものま
で適用できる。
This can be understood by considering the ellipse that appears when a cylinder is obliquely cut. And this cutting edge ridge (4)
The ellipse has a radius of curvature of about 200 to 800 mm. Therefore, whereas the conventional circular cutting edge was 200 to 300 mm, it can be applied to considerably larger edges.

なお、本実施例では高速切削を可能にするため切刃稜(
4)を構成する部分には、切刃複合体(5)が適用され
ている。この切刃複合体(5)は、切刃層(6)および
合金(7)からなるものである。この場合、切刃層(6
)はダイヤモンド、立方晶窒化硼素等の多結晶焼結体か
らなり、超硬合金等の合金(7) Iニーに焼結固着さ
れる。そして、この焼結固着は超高圧高温装置の利用に
より超高圧高温下で行なわれる。
In addition, in this example, in order to enable high-speed cutting, the cutting edge ridge (
A cutting blade composite (5) is applied to the part constituting 4). This cutting edge composite (5) consists of a cutting edge layer (6) and an alloy (7). In this case, the cutting edge layer (6
) is made of a polycrystalline sintered body of diamond, cubic boron nitride, etc., and is sintered and fixed to an alloy (7) I knee such as cemented carbide. This sintering and fixing is performed under ultra-high pressure and high temperature using an ultra-high pressure and high temperature apparatus.

したがって、この切刃複合体(5)を適用した場合には
、切削工具用チップ(1)の本体部分(8)が超硬合6
頁 金ではなく、鋼から構成されることもある。これはいわ
ゆるブレード形式のもので、再研削を意図しスローアウ
ェイ形式に対するものである。
Therefore, when this cutting blade composite (5) is applied, the main body portion (8) of the cutting tool tip (1) is made of carbide 6
It may also be constructed of steel rather than page metal. This is a so-called blade type, and is intended for re-grinding, as opposed to an indexable type.

このようにして構成された楕円状の切刃稜(4)は直線
切刃稜(図示せず)に対し、びびり現象が減少して良好
な仕上げ面粗さが得られるものである。
The elliptical cutting edge (4) configured in this manner reduces the chattering phenomenon and provides a good finished surface roughness compared to a straight cutting edge (not shown).

なお、本実施例では、−側部のみに切刃稜(4)が形成
されているが、例えば正方形板状の切削工具用チップ(
1)を適用して、その4側部に円弧状の逃げ面(2)お
よび楕円状の切刃稜(4)を形成してもよいものである
In this example, the cutting edge ridge (4) is formed only on the negative side, but for example, a square plate-shaped cutting tool tip (
1) may be applied to form an arcuate flank (2) and an elliptical cutting edge (4) on its four sides.

次に、本発明の切削工具用チップ(1)の研削方法につ
いて、概念的に示した第4図(a)〜(d)を参照しな
がら説明する。
Next, a method of grinding a cutting tool tip (1) according to the present invention will be described with reference to conceptually shown FIGS. 4(a) to 4(d).

第4図(a)において、(9)は縮少されて示されてい
る回転軸であり、その略中央部位には、切削工具用チッ
プ(1)を受入れる取付は溝α1が形成されている。こ
の取付は溝α1は、その軸方向では、捩れ角θを有する
もので、その半径方向では逃げ相当角αを有するように
形成される。この場合取付は溝7頁 0〔が、回転軸(9)に直接形成されれば、常に一定の
ものにしか適用できない。しかし、回転軸(9)の半径
方向に取付は穴(図示せず)を穿設し、この取付は穴内
に進退可能な直交軸(図示せず)を設けてこの直交軸に
前記取付は溝θ〔を形成すれば、その研削半径が可変と
なり適用範囲が拡大されるものである。
In FIG. 4(a), (9) is a rotary shaft shown in a reduced size, and a mounting groove α1 for receiving a cutting tool tip (1) is formed approximately in the center thereof. . In this attachment, the groove α1 is formed so that it has a torsion angle θ in its axial direction and an equivalent relief angle α in its radial direction. In this case, if the groove 7 page 0 [is formed directly on the rotating shaft (9), the mounting can only be applied to a fixed type. However, for mounting, a hole (not shown) is bored in the radial direction of the rotating shaft (9), and an orthogonal shaft (not shown) that can move forward and backward is provided in the hole. By forming θ[, the grinding radius becomes variable and the range of application is expanded.

しかして、この取付は溝0〔内には、前記切削工具用チ
ップ(1)が受入れられ、楔片、ねじ等の手段で固定さ
れる。そして、この場合研削されるべき外郭側面が、回
転軸(9)の半径方向に凸出し、所定量、回転砥石(1
1)によって研削される。
Thus, in this installation, the cutting tool tip (1) is received in the groove 0 and fixed by means such as a wedge piece or a screw. In this case, the outer side surface to be ground protrudes in the radial direction of the rotary shaft (9), and the rotary grindstone (1) protrudes by a predetermined amount.
1).

したがって、前記回転軸(9)は矢印のように、回転す
るとともに軸方向に移動し、切削工具用チップ(1)に
は、円弧状の逃げ面(2)および楕円状の切刃稜(4)
が形成される。これは、円柱面がθの角度で斜截された
ときの楕円が基礎になっているものである。
Therefore, the rotating shaft (9) rotates and moves in the axial direction as shown by the arrow, and the cutting tool tip (1) has an arcuate flank (2) and an elliptical cutting edge (4). )
is formed. This is based on the ellipse created when a cylindrical surface is obliquely cut at an angle of θ.

そして、逃げ面(2)の曲率半径Rは、回転軸(9)の
軸心方向からの曲率半径Roおよび捩れ角θの値によっ
て予め与えられ、また切刃稜(4)の楕円曲線は、曲率
半径Rに関係したROに基いて与えられる。この場合前
述した曲率半径R,Roとの間ではR>Roの関係があ
るが、前記捩れ角θがそれほど大きくなければR−F!
−ROとして取扱ってもよいものである。なあ、θは、
一般に30°以下に採られ、αは3°〜30°通常15
’〜25′の範囲から選択される。
The radius of curvature R of the flank (2) is given in advance by the values of the radius of curvature Ro and the torsion angle θ from the axial direction of the rotating shaft (9), and the elliptic curve of the cutting edge (4) is It is given based on RO related to the radius of curvature R. In this case, there is a relationship R>Ro between the radii of curvature R and Ro described above, but if the torsion angle θ is not so large, R-F!
-It may be handled as RO. Hey, θ is
Generally taken below 30°, α is 3° to 30° usually 15
Selected from the range '~25'.

このようにして構成された本発明の切削工具用チップ(
1)は、剛性の高い回転軸(9)上に取付けられて研削
されるため、その研削剛性が非常に高いものである。こ
れは回転軸(9)の斜截方向における楕円曲線を切刃稜
に利用しているため、回転軸の回転半径に関連してこれ
よりもはるかに大きな曲率半径が得られるためである。
The cutting tool tip of the present invention configured in this way (
1) is mounted on a highly rigid rotating shaft (9) and is ground, so its grinding rigidity is very high. This is because the elliptical curve in the oblique direction of the rotating shaft (9) is utilized for the cutting edge edge, so that a much larger radius of curvature can be obtained in relation to the radius of rotation of the rotating shaft.

また、研削剛性が高いことから、これにより得られた楕
円状の切刃稜(4)については、その刃立ちが良好にな
るものである。したがって、仕上げ切削においては、切
削寿命、切削能率が向上するほか仕上げ面粗さが向上す
るという利点を有する。
Moreover, since the grinding rigidity is high, the resulting elliptical cutting edge (4) has a good edge. Therefore, in finish cutting, there are advantages in that the cutting life and cutting efficiency are improved, and the finished surface roughness is also improved.

9頁9 pages

【図面の簡単な説明】 第1図は、本発明切削工具用チップの一実施例を示す正
面図、第2図はその側面図、第3図は斜下方からの側面
図、第4図は本発明切削工具用チップの研削方法におけ
る一実施例を概念的に示した説明図で、(a)は正面図
、(b)は斜上方からの一部の側面図、(C)はその上
面図、(d)は第4図(a>中のd−d線に沿って得ら
れる一部断面図である。 (1)・・・・・・切削工具用チップ (2)・・・・
・・逃げ面(4)・・・・・・切刃稜 (5)・・・・
・・切刃複合体(9)・・・・・・回転軸 Ql・・・
・・・取付は溝αυ・・・・・・回転砥石 特許出願人 東芝タンガロイ株式会社
[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a front view showing one embodiment of the cutting tool tip of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a side view from diagonally below, and FIG. FIG. 2 is an explanatory diagram conceptually showing an embodiment of the method for grinding a cutting tool tip according to the present invention, in which (a) is a front view, (b) is a partial side view from diagonally above, and (C) is the top surface thereof. Figure, (d) is a partial cross-sectional view taken along line dd in Fig. 4 (a). (1) Cutting tool tip (2)...
... Flank surface (4) ... Cutting edge ridge (5) ...
... Cutting blade complex (9) ... Rotating shaft Ql ...
...Mounting with groove αυ...Rotary whetstone patent applicant Toshiba Tungaloy Corporation

Claims (4)

【特許請求の範囲】[Claims] (1)外郭側面の一部又は全部が、逃げ面として形成さ
れ、しかもその上面との境界稜線が略円弧状の切刃稜と
して研削形成されるようにした多角形板状の切削工具用
チップにおいて、 前記逃げ面は、その厚み方向で曲率半径Rを有してあり
、 前記切刃稜は、その長さ方向で、前記曲率半径Rに関係
した楕円曲線の一部から形成されていることを特徴とす
る切削工具用チップ。
(1) A polygonal plate-shaped cutting tool tip in which part or all of the outer side surface is formed as a flank surface, and the boundary ridge line with the upper surface is ground and formed as a substantially arc-shaped cutting edge ridge. The flank surface has a radius of curvature R in its thickness direction, and the cutting edge is formed from a part of an elliptic curve related to the radius of curvature R in its length direction. A cutting tool tip featuring:
(2)前記切刃稜は、ダイヤモンド、立方晶窒化硼素等
の多結晶焼結体からなる切刃層に形成されている特許請
求の範囲第1項記載の切削工具用チップ。
(2) The cutting tool tip according to claim 1, wherein the cutting edge is formed in a cutting edge layer made of a polycrystalline sintered body of diamond, cubic boron nitride, or the like.
(3)前記曲率半径Rは、50〜200+u+の範囲内
から選択されている特許請求の範囲第1項又は第2項記
載の切削工具用チップ。 2頁
(3) The cutting tool tip according to claim 1 or 2, wherein the radius of curvature R is selected from a range of 50 to 200+u+. 2 pages
(4)外郭側面の一部又は全部が、逃げ面として形成さ
れ、しかもその上面との境界稜線が略円弧状の切刃稜と
して研削形成されるようにした多角形板状の切削工具用
チップの研削方法において、前記切削工具用チップは、
以下の工程を経て研削されることを特徴とする切削工具
用チップの研削方法。 0)回転軸の略中央部位に形成された軸方向の捩れ角θ
および半径方向で逃げ相当角αをそれぞれ有する取付は
溝内で、研削されるべき外郭側面が前記回転軸から半径
方向に凸出するように取付けられる取付は工程。 (b) 前記回転軸が回転砥石に対して、回転させられ
るとともに、軸方向に移動させられる送り操作工程。 (c) 前記回転砥石によって回転方向にある厚さ方向
で曲率半径Rを有する円弧状の逃げ面が形成され、しか
もその上面との境界稜線としての切刃稜がその長子方向
で前記曲率半径Rに関係した楕円曲線の一部から形成さ
れる研削工程。 3頁
(4) A polygonal plate-shaped cutting tool tip in which part or all of the outer side surface is formed as a flank surface, and the boundary ridge line with the upper surface is ground and formed as a substantially arc-shaped cutting edge ridge. In the grinding method, the cutting tool tip comprises:
A method for grinding a tip for a cutting tool, characterized in that the tip is ground through the following steps. 0) Axial twist angle θ formed at approximately the center of the rotating shaft
and a mounting having an equivalent clearance angle α in the radial direction is within the groove, and a mounting is mounted such that the outer side surface to be ground protrudes from the rotation axis in the radial direction. (b) A feeding operation step in which the rotating shaft is rotated and moved in the axial direction with respect to the rotary grindstone. (c) An arc-shaped flank having a radius of curvature R in the thickness direction in the rotating direction is formed by the rotary grindstone, and the cutting edge ridge as a boundary ridge with the upper surface has the radius of curvature R in the longitudinal direction. A grinding process formed from a portion of an elliptic curve related to. 3 pages
JP21896583A 1983-11-21 1983-11-21 Tip for cutting tool and its grinding method Pending JPS60114402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21896583A JPS60114402A (en) 1983-11-21 1983-11-21 Tip for cutting tool and its grinding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21896583A JPS60114402A (en) 1983-11-21 1983-11-21 Tip for cutting tool and its grinding method

Publications (1)

Publication Number Publication Date
JPS60114402A true JPS60114402A (en) 1985-06-20

Family

ID=16728122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21896583A Pending JPS60114402A (en) 1983-11-21 1983-11-21 Tip for cutting tool and its grinding method

Country Status (1)

Country Link
JP (1) JPS60114402A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117003U (en) * 1986-01-13 1987-07-25
US6496083B1 (en) 1997-06-03 2002-12-17 Matsushita Electric Industrial Co., Ltd. Diode compensation circuit including two series and one parallel resonance points
WO2018047212A1 (en) * 2016-09-09 2018-03-15 Sumitomo Electric Hardmetal Corp. Method of machining a rotationaly symmetric surface of a workpiece and turning apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561170A (en) * 1968-04-30 1971-02-09 Allegheny Ludlum Steel Method of making indexable pre-spun cutting inserts
JPS5844125B2 (en) * 1978-09-11 1983-10-01 三菱電機株式会社 Induction hardening equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561170A (en) * 1968-04-30 1971-02-09 Allegheny Ludlum Steel Method of making indexable pre-spun cutting inserts
JPS5844125B2 (en) * 1978-09-11 1983-10-01 三菱電機株式会社 Induction hardening equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117003U (en) * 1986-01-13 1987-07-25
US6496083B1 (en) 1997-06-03 2002-12-17 Matsushita Electric Industrial Co., Ltd. Diode compensation circuit including two series and one parallel resonance points
WO2018047212A1 (en) * 2016-09-09 2018-03-15 Sumitomo Electric Hardmetal Corp. Method of machining a rotationaly symmetric surface of a workpiece and turning apparatus

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