JPH058104A - Cutting tool - Google Patents
Cutting toolInfo
- Publication number
- JPH058104A JPH058104A JP19053591A JP19053591A JPH058104A JP H058104 A JPH058104 A JP H058104A JP 19053591 A JP19053591 A JP 19053591A JP 19053591 A JP19053591 A JP 19053591A JP H058104 A JPH058104 A JP H058104A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- honing
- cutting
- flank
- tool
- 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
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、切刃稜にホーニング処
理を施した切削工具に関し、特に、耐摩耗性の低下が少
なく、耐欠損性が向上するようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool in which a cutting edge has been subjected to honing treatment, and more particularly to a tool having a small decrease in wear resistance and an improved chipping resistance.
【０００２】[0002]
【従来の技術】従来、この種の切削工具は、耐欠損性を
高める手段として、ホーニング処理が行なわれている。
このホーニング処理は、一般的には、丸ホーニング、角
度ホーニング、曲面状のホーニングなどが知られてい
る。そして、この曲面状のホーニングについては、スロ
ーアウェイチップに適用した特公昭５３−２５３９２号
公報、特公昭５６−２２６６４号公報など、エンドミル
に適用した実公昭６２−８１２号公報など、ドリルに適
用した特開昭６０−２２１２０８号公報などが開示され
ている。2. Description of the Related Art Conventionally, a cutting tool of this kind has been subjected to a honing treatment as a means for improving the fracture resistance.
This honing process is generally known as round honing, angle honing, curved honing, or the like. The curved honing was applied to a drill such as Japanese Patent Publication No. 53-25392 and Japanese Patent Publication No. 56-22664 applied to a throw-away tip, and Japanese Utility Model Publication No. 62-812 applied to an end mill. JP-A-60-221208 and the like are disclosed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述し
たホーニング処理は超硬合金、サーメットなどの材質
面、特に表面組織からの検討まではなされておらず、最
適な組合せについては、未だ開発されていないという問
題点があった。However, the above-mentioned honing treatment has not been examined from the viewpoint of the material surface of cemented carbide, cermet, etc., especially the surface structure, and the optimum combination has not yet been developed. There was a problem.
【０００４】このようなことから、本発明では、ホーニ
ング形状および工具基体の表面組織に関する最適組合せ
を追求して、耐摩耗性の低下が少なく、耐欠損性の向上
が得られるようにした切削工具を提供しようとするもの
である。In view of the above, the present invention pursues an optimum combination of the honing shape and the surface structure of the tool base, and is capable of reducing the wear resistance and improving the fracture resistance. Is to provide.
【０００５】[0005]
【課題を解決するための手段】本発明は、上述した点に
鑑みなされたもので、切刃稜に形成されるホーニングの
処理面は、形状線が得られる横断方向で、すくい面およ
び逃げ面側における両端部分の表面硬度が高く、その中
央部分の表面硬度が低くなるようにした硬度勾配を備え
た切削工具を提供するものである。この場合、硬度勾配
は、工具の表面から内部に向って硬度が低下する硬度傾
斜層を工具の表面部分に形成し、次いでホーニング処理
すれば得られるものである。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and the honing processing surface formed on the cutting edge is a rake surface and a flank surface in the transverse direction in which the shape line is obtained. It is intended to provide a cutting tool having a hardness gradient such that the surface hardness of both end portions on the side is high and the surface hardness of the central portion thereof is low. In this case, the hardness gradient is obtained by forming a hardness gradient layer in which the hardness decreases inward from the surface of the tool on the surface of the tool and then performing a honing process.
【０００６】また、前述した切削工具は、そのまま切削
に適用してもよいが、ＴｉＮ，ＴｉＣ，Ａｌ2Ｏ3などか
らなる単層または複層の硬質被覆層を形成すれば、さら
に良好な切削が可能である。The above-mentioned cutting tool may be applied to cutting as it is, but if a single-layer or multiple-layer hard coating layer made of TiN, TiC, Al 2 O 3 or the like is formed, a better cutting is achieved. Is possible.
【０００７】[0007]
【作用】本発明の切削工具は、すくい面および逃げ面の
交差により構成される切刃稜がホーニング処理されるこ
とにより、刃先保護が図られているものである。そし
て、このホーニングによる処理面は、形状線が得られる
横断方向で、すくい面および逃げ面側における両端部分
の表面硬度が高く、その中央部分の表面硬度が低くなる
ようにした硬度勾配を備えることから、耐摩耗性の低下
が少なく、耐欠損性が向上するように機能する。In the cutting tool of the present invention, the cutting edge is constituted by the intersection of the rake face and the flank face, and the cutting edge is protected by honing. The surface to be treated by this honing should have a hardness gradient such that the surface hardness of both ends on the side of the rake face and the flank is high and the hardness of the central part is low in the transverse direction where the shape line is obtained. Therefore, the wear resistance is less likely to decrease, and the fracture resistance is improved.
【０００８】[0008]
【実施例】以下、本発明切削工具の一実施例について、
図を参照しながら説明する。EXAMPLES Examples of the cutting tool of the present invention will be described below.
Description will be given with reference to the drawings.
【０００９】図１は、切削工具としてのスローアウェイ
チップ１を示すものであり、このスローアウェイチップ
１は、略正方形板状をなし、超硬合金、サーメット、セ
ラミックなどから製作される。そして、このスローアウ
ェイチップ１は、切削に関与するときは、その上下面が
すくい面２を構成し、側面が逃げ面３を構成する。ま
た、これらのすくい面２および逃げ面３の交差によって
切刃稜４が形成される。FIG. 1 shows a throw-away tip 1 as a cutting tool. The throw-away tip 1 has a substantially square plate shape and is made of cemented carbide, cermet, ceramic or the like. When the throw-away tip 1 is involved in cutting, the upper and lower surfaces thereof form the rake surface 2 and the side surfaces thereof form the flank surface 3. The cutting edge 4 is formed by the intersection of the rake face 2 and the flank face 3.
【００１０】この切刃稜４は、刃先保護のため図２
（ａ）〜（ｅ）で明示されるように、（ａ）にみられる
Ｒホーニング、（ｂ）および（ｃ）にみられる角度ホー
ニング、（ｄ）および（ｅ）にみられる曲面状ホーニン
グなどが施されるものである。この場合、図２（ｃ），
（ｅ）は、すくい面２および逃げ面３側にそれぞれ小さ
な曲率半径Ｒ1，Ｒ2を付加したものである。The cutting edge 4 is shown in FIG. 2 to protect the cutting edge.
As clearly shown in (a) to (e), R honing seen in (a), angular honing seen in (b) and (c), curved honing seen in (d) and (e), etc. Is applied. In this case, FIG.
In (e), small radii of curvature R 1 and R 2 are added to the rake face 2 side and the flank face 3 side, respectively.
【００１１】しかして、このスローアウェイチップ１
は、図３で模式的に示されているように、その表面部分
に硬度傾斜層５が形成されるものである。この場合、想
像線Ｈは、硬さの等高線を示したものであり、メッシュ
で表示された部分がホーニング処理により除去されるも
のである。なお、前記硬度傾斜層５は、層厚が約０．５
ｍｍ程度のものであり、超硬合金、サーメットなどで
は、例えばその結合材を表面から内部に向って増加させ
たり、あるいは、予じめ硬さの異なる成分を層状に配置
したり、成分によっては、表面窒化処理などをしたりす
ることで容易に得られる。そして、この硬度傾斜層５は
通常表面硬度がＨVで１７００〜２４００、表面から約
０．５ｍｍ深さの内部硬質がＨVで１６００以下に設定
される。Then, the throw-away tip 1
3, the hardness gradient layer 5 is formed on the surface portion thereof, as schematically shown in FIG. In this case, the imaginary line H indicates a contour line of hardness, and the portion displayed by the mesh is removed by the honing process. The hardness gradient layer 5 has a layer thickness of about 0.5.
In the case of cemented carbide, cermet, etc., for example, the binder is increased from the surface toward the inside, or components having different preliminary hardnesses are arranged in layers, and depending on the component, It can be easily obtained by performing surface nitriding treatment or the like. Further, the surface hardness of the graded hardness layer 5 is usually set to 1700 to 2400 at H V , and the internal hardness at a depth of about 0.5 mm from the surface is set to 1600 or less at H V.
【００１２】図４は、具体的な硬さ勾配を示した特性図
であり、図５は、ホーニングによる処理面６の表面硬度
を示したものである。FIG. 4 is a characteristic diagram showing a concrete hardness gradient, and FIG. 5 shows the surface hardness of the treated surface 6 by honing.
【００１３】すなわち、図４では、層厚約０．５ｍｍを
有する硬度傾斜層５の硬さ勾配をＡで示し、硬さ変化を
考慮していない従来品をＢで示している。また、図５で
は、角度ホーニングの例が示され、すくい面２および逃
げ面３の表面硬質が約ＨVで２１００であり、処理面６
の中央部分の表面硬質が約ＨVで１８００程度になって
いる。これは、耐欠損性に影響の大きい処理面６がすく
い面２、逃げ面３よりも軟らかく靭性があるため、耐欠
損性が向上することを意味している。また、すくい面
２、逃げ面３の表面硬度は、処理面６よりも硬いため、
摩耗の進行が抑えられ、耐摩耗性の低下が少ないことを
意味している。That is, in FIG. 4, the hardness gradient of the hardness gradient layer 5 having a layer thickness of about 0.5 mm is indicated by A, and the conventional product in which the change in hardness is not taken into consideration is indicated by B. Further, FIG. 5 shows an example of the angle honing, in which the surface hardness of the rake face 2 and the flank face 3 is about H V 2100, and the treated face 6
The surface hardness of the central part of the is about 1800 at H V. This means that the treated surface 6, which has a great influence on the fracture resistance, is softer and tougher than the rake face 2 and the flank face 3, so that the fracture resistance is improved. The surface hardness of the rake face 2 and the flank face 3 is harder than that of the treated face 6,
This means that the progress of wear is suppressed and the deterioration of wear resistance is small.
【００１４】[0014]
【切削例】このようにして構成されたスローアウェイチ
ップ１について、耐摩耗性試験および耐欠損性試験を行
なった。この場合、スローアウェイチップ１は、図１で
示されるような正方形板のものであり、ホーニングによ
る処理面６については、図５で示されるような角度ホー
ニングを施したものである。[Cutting Example] The throw-away tip 1 thus configured was subjected to a wear resistance test and a fracture resistance test. In this case, the throw-away tip 1 is a square plate as shown in FIG. 1, and the surface 6 to be treated by honing is subjected to angular honing as shown in FIG.
【００１５】耐摩耗性試験は、２０分の外周削りの結果
を比較したものであり、その結果は、本発明品Ａがすぐ
れていることを確認した（図６参照）。また、耐欠損性
試験は、４本スロット溝入りの断続切削で比較したが、
その結果でも本発明品Ａが高い送り値を示した（図７参
照）。なお、比較の従来品Ｂは、いずれも硬さ変化を考
慮していないものである（図４参照）。The abrasion resistance test was a comparison of the results of peripheral cutting for 20 minutes, and the results confirmed that the product A of the present invention was excellent (see FIG. 6). In addition, the fracture resistance test was compared with intermittent cutting with four slot grooves,
As a result, the product A of the present invention also showed a high feed value (see FIG. 7). The comparative conventional products B do not take into consideration the change in hardness (see FIG. 4).
【００１６】また、角度ホーニング以外の丸ホーニン
グ、曲線状ホーニングについても切削試験を行なってみ
たが、従来品に比較していずれもすぐれた結果を示し
た。Cutting tests were also conducted on round honing and curved honing other than the angle honing, and all showed excellent results as compared with the conventional products.
【００１７】さらに、本発明の切削工具で硬度傾斜層５
については、すくい面２および逃げ面３の表面硬度がＨ
Vで約１６００以上であること、すくい面２および逃げ
面３の表面硬度と処理面６の最も軟かい部分の表面硬度
の差がＨVで６０以上ある場合、特に効果が大きいこと
を確認した。Further, in the cutting tool of the present invention, the hardness gradient layer 5 is formed.
The surface hardness of the rake face 2 and the flank face 3 is H
It in V is about 1600 or more, if the most soft difference in surface hardness of the portions of the treated surface 6 and the surface hardness of the rake face 2 and flank face 3 is 60 or more H V, in particular confirm that the effect is greater .
【００１８】なお、図３で示されるような曲線状ホーニ
ングについては、すくい面側の除去量ａ＝０．０５〜
０．１４ｍｍ、逃げ面側の除去量ｂ＝０．０２５〜０．
０７ｍｍで、すくい面／逃げ面＝１．３〜２．８の範囲
が好適することを確認した。With regard to the curved honing as shown in FIG. 3, the removal amount a on the rake face side is a = 0.05 to
0.14 mm, removal amount b on flank side b = 0.025-0.
At 07 mm, it was confirmed that the range of rake face / flank face = 1.3 to 2.8 is suitable.
【００１９】また、本発明のスローアウェイチップ１に
ついて、その表面にＴｉＣ，ＴｉＮ，Ａｌ2Ｏ3などの硬
質被覆層が形成されたものを切削試験に供したが、いず
れも良好な結果を示した。さらに、旋削だけでなく転
削、穴あけなどにも適用したが、いずれも良好であっ
た。The throw-away tip 1 of the present invention having a hard coating layer such as TiC, TiN or Al 2 O 3 formed on its surface was subjected to a cutting test, and all of them showed good results. It was Furthermore, it was applied to not only turning but also rolling, drilling, etc., and all were good.
【００２０】[0020]
【発明の効果】本発明は、以上説明したように、切刃稜
４のホーニングによる処理面６は、形状線が得られる横
断面方向で、すくい面および逃げ面側における両端部分
の表面硬度が高く、そ中央部分の表面硬度が低くなるよ
うにした硬度勾配を備えているため、耐摩耗性の低下が
少なく、耐欠損性が向上するという利点を有する。As described above, according to the present invention, the surface 6 to be treated by honing of the cutting edge 4 has a surface hardness of both end portions on the side of the rake face and the flank in the cross-sectional direction in which the shape line is obtained. Since the hardness gradient is high and the surface hardness of the central portion is low, there is an advantage that the wear resistance is less deteriorated and the fracture resistance is improved.
【図１】本発明切削工具をスローアイェイチップに適用
した一実施例を示す斜視図、FIG. 1 is a perspective view showing an embodiment in which a cutting tool of the present invention is applied to a throw eye tip,
【図２】ホーニングの適用例をそれぞれ（ａ）〜（ｅ）
で示した要部の断面図、[FIG. 2] Examples of application of honing (a) to (e), respectively.
A cross-sectional view of the main part shown in
【図３】本発明切削工具の硬さ傾斜を示す要部の模式
図、FIG. 3 is a schematic view of a main part showing a hardness inclination of the cutting tool of the present invention,
【図４】本発明切削工具の硬さ傾斜層の硬さ勾配を示す
特性図、FIG. 4 is a characteristic diagram showing a hardness gradient of a hardness gradient layer of the cutting tool of the present invention,
【図５】本発明切削工具のホーニングによる処理面の硬
さ勾配を示す特性図、FIG. 5 is a characteristic diagram showing a hardness gradient of a treated surface by honing of the cutting tool of the present invention,
【図６】本発明切削工具および従来品における耐摩耗性
試験の比較結果を示す説明図、FIG. 6 is an explanatory view showing a comparison result of wear resistance tests on the cutting tool of the present invention and a conventional product;
【図７】本発明切削工具および従来品における耐欠損性
試験の比較結果を示す説明図。FIG. 7 is an explanatory view showing a comparison result of fracture resistance tests of the cutting tool of the present invention and a conventional product.
１ スローアウェイチップ ２ すくい面 ３ 逃げ面 ４ 切刃稜 ５ 硬度傾斜層 ６ 処理面 1 Throw-away tip 2 rake face 3 flank 4 cutting edge 5 Hardness gradient layer 6 Processing surface
Claims (3)
面３が構成され、しかもこれらのすくい面２および逃げ
面３の交差により形成される切刃稜４には、ホーニング
による処理面６が形成されるようにした切削工具におい
て、 前記処理面６は、形状線が得られる横断面方向で、すく
い面２および逃げ面３側における両端部分の表面硬度が
高く、その中央部分の表面硬度が低くなるようにした硬
度勾配を備えていることを特徴とする切削工具。1. A rake face 2 and a flank 3 are formed on the surface of the tool, and a cutting edge 4 formed by the intersection of the rake face 2 and the flank 3 has a treated surface 6 by honing. In the cutting tool in which the surface is formed, the processed surface 6 has a high surface hardness at both end portions on the side of the rake face 2 and the flank 3 in the transverse direction in which the shape line is obtained, and the surface hardness of the central portion thereof. The cutting tool is characterized by having a hardness gradient which is designed to be low.
から内部に向って硬度が低下する硬度傾斜層５を工具の
表面部分に形成することにより得られる請求項１記載の
切削工具。2. The cutting tool according to claim 1, wherein the hardness gradient according to claim 1 is obtained by forming a hardness gradient layer 5 on the surface portion of the tool, the hardness of which is decreased from the surface toward the inside.
ＴｉＮ，ＴｉＣ，Ａｌ2Ｏ3などからなる硬質被覆層が単
層または複層が形成されている請求項１または請求項２
記載の切削工具。3. The surface of the tool according to claim 1, wherein
The hard coating layer made of TiN, TiC, Al 2 O 3 or the like is formed as a single layer or multiple layers.
The cutting tool described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19053591A JP3249150B2 (en) | 1991-07-04 | 1991-07-04 | Cutting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19053591A JP3249150B2 (en) | 1991-07-04 | 1991-07-04 | Cutting tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH058104A true JPH058104A (en) | 1993-01-19 |
| JP3249150B2 JP3249150B2 (en) | 2002-01-21 |
Family
ID=16259706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19053591A Expired - Fee Related JP3249150B2 (en) | 1991-07-04 | 1991-07-04 | Cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3249150B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006003788A1 (en) * | 2004-06-30 | 2006-01-12 | A.L.M.T. Corp. | Single crystal diamond cutting tool for ultraprecision machining |
| JP2011115945A (en) * | 2011-03-14 | 2011-06-16 | Kyocera Corp | Throwaway tip |
| JP2021084149A (en) * | 2019-11-26 | 2021-06-03 | 株式会社アライドマテリアル | Rotary cutting tool |
| JPWO2021193860A1 (en) * | 2020-03-27 | 2021-09-30 | ||
| JPWO2021193859A1 (en) * | 2020-03-27 | 2021-09-30 |
-
1991
- 1991-07-04 JP JP19053591A patent/JP3249150B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006003788A1 (en) * | 2004-06-30 | 2006-01-12 | A.L.M.T. Corp. | Single crystal diamond cutting tool for ultraprecision machining |
| US7556456B2 (en) | 2004-06-30 | 2009-07-07 | A.L.M.T. Corp. | Mono crystalline diamond cutting tool for ultra precision machining |
| JP2011115945A (en) * | 2011-03-14 | 2011-06-16 | Kyocera Corp | Throwaway tip |
| JP2021084149A (en) * | 2019-11-26 | 2021-06-03 | 株式会社アライドマテリアル | Rotary cutting tool |
| JPWO2021193860A1 (en) * | 2020-03-27 | 2021-09-30 | ||
| JPWO2021193859A1 (en) * | 2020-03-27 | 2021-09-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3249150B2 (en) | 2002-01-21 |
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