JP2003025117A - Diamond coated cutting tool - Google Patents
Diamond coated cutting toolInfo
- Publication number
- JP2003025117A JP2003025117A JP2001216459A JP2001216459A JP2003025117A JP 2003025117 A JP2003025117 A JP 2003025117A JP 2001216459 A JP2001216459 A JP 2001216459A JP 2001216459 A JP2001216459 A JP 2001216459A JP 2003025117 A JP2003025117 A JP 2003025117A
- Authority
- JP
- Japan
- Prior art keywords
- diamond
- cutting tool
- coated
- film
- coated cutting
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は超硬合金基体上に多
結晶質のダイヤモンド膜を被覆したことを特徴とする切
削工具に関し、さらに詳しくは、切削工具の切れ刃部及
び切れ刃部の近傍を中心とする切削工具の作用部にのみ
ダイヤモンド膜を被覆したのち潤滑膜を被覆することに
よって、切れ刃部の耐摩耗性を損なうことなく切り屑の
処理性能を向上させ、さらに被削物の溶着を大幅に軽減
させたことを特徴とするダイヤモンド被覆切削工具に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool characterized by coating a polycrystalline diamond film on a cemented carbide substrate, and more specifically, to a cutting edge of the cutting tool and the vicinity of the cutting edge. By coating the diamond film only on the working part of the cutting tool, and then coating the lubricant film, the chip processing performance is improved without impairing the wear resistance of the cutting edge part, and the work piece The present invention relates to a diamond-coated cutting tool which is characterized by significantly reducing welding.
【０００２】[0002]
【従来の技術】気相法即ちCVD 法でダイヤモンド膜を合
成する方法が発明されて久しいが、最近ではその高い硬
度を生かし、高い耐摩耗性が要求される切削工具の被膜
として利用され始めている。一方、近年環境問題への関
心が高まる中で、切削加工の分野でも切削油を用いな
い、あるいは用いても最小限の使用量に抑えようとい
う、いわゆるドライ・セミドライ加工への対応が急務と
なっている。ダイヤモンド膜は、特に非鉄金属加工の分
野においてウェット環境下ではその高い耐摩耗性を生か
し優れた工具性能を示すが、ドライあるいはセミドライ
加工となると、被削物の溶着とそれに伴う切り屑排出性
の低下により、膜が本来兼ね備えている性質を十二分に
発揮することができず、早期に工具寿命となってしま
う。BACKGROUND OF THE INVENTION It has been a long time since a method of synthesizing a diamond film by a vapor phase method, that is, a CVD method has been invented, but recently, it has begun to be used as a coating film of a cutting tool which requires high wear resistance by utilizing its high hardness. . On the other hand, with increasing concern over environmental issues in recent years, there is an urgent need to respond to so-called dry / semi-dry machining, which involves not using cutting oil or even using it in a cutting field to minimize the amount used. ing. Diamond film exhibits excellent tool performance by taking advantage of its high wear resistance particularly in the field of non-ferrous metal processing in a wet environment, but when dry or semi-dry processing is performed, welding of the work piece and accompanying chip discharge performance Due to the decrease, the properties that the film originally possesses cannot be fully exerted, and the tool life becomes early.
【０００３】[0003]
【発明が解決しようとする課題】上述の被削物の溶着、
及び切り屑の流れが悪くなる原因はCVD 法により被覆さ
れたダイヤモンド膜が自形面を持った多結晶質であるた
め、表面の凹凸が大きく、したがって切り屑とダイヤモ
ンド膜の間の摩擦係数が大きくなるためであるが、CVD
法により硬度の高いダイヤモンド膜を被覆する場合には
現在のところダイヤモンド膜の表面が粗くなってしまう
ため、このような現象は不可避的に起こってしまう。本
発明の課題は、ドライ・セミドライ加工において、ダイ
ヤモンド被覆切削工具の切れ刃部の耐摩耗性を損なうこ
となく、大きい表面の凹凸をやわらげて切り屑とダイヤ
モンド膜の間の摩擦係数を小さくして、被削物の溶着、
及び切り屑の流れをよくしたダイヤモンド被覆切削工具
を提供することにある。The welding of the above-mentioned work piece,
Also, the cause of poor chip flow is that the diamond film coated by the CVD method is polycrystalline with an automorphic surface, so the surface irregularities are large, and therefore the friction coefficient between the chip and the diamond film is large. This is because it gets bigger, but CVD
When a diamond film having a high hardness is coated by the method, the surface of the diamond film is currently roughened, so that such a phenomenon inevitably occurs. An object of the present invention is to reduce the friction coefficient between the chips and the diamond film by softening the unevenness of the large surface without damaging the wear resistance of the cutting edge portion of the diamond-coated cutting tool in the dry / semi-dry processing. Welding of work pieces,
Another object of the present invention is to provide a diamond-coated cutting tool that improves the flow of chips.
【０００４】[0004]
【課題を解決するための手段】このため本発明は、超硬
合金の切削工具基体の切れ刃及び切れ刃部近傍にダイヤ
モンド被覆膜を形成し、次いで該ダイヤモンド被覆部を
含む基体表面に潤滑性に優れた保護膜を被覆することを
特徴とするダイヤモンド被覆切削工具を提供することに
より、上述した従来技術の課題を解決した。Therefore, according to the present invention, a diamond coating film is formed on the cutting edge of a cemented carbide cutting tool substrate and in the vicinity of the cutting edge, and then the surface of the substrate including the diamond coating is lubricated. By providing a diamond-coated cutting tool characterized by coating a protective film having excellent properties, the above-mentioned problems of the prior art have been solved.
【０００５】[0005]
【発明の効果】かかる構成により、本発明では切削工具
の切れ刃部及び切れ刃部の近傍を中心とする切削工具の
作用部にのみダイヤモンド膜を被覆したのち潤滑膜を被
覆することによって、ダイヤモンド膜表面の凹凸面を起
点としてはじまる被削物の溶着を防ぎ、切れ刃部の耐摩
耗性を損なうことなく被削物の溶着を最小限に抑えるこ
とができた。かつこれらの膜を被覆することにより、切
削工具の切れ刃部及び切れ刃部の近傍部ではダイヤモン
ドの高い耐摩耗性を生かしつつも、他の直接切削に関与
していない部分では切り屑の排出性を改善することがで
き、切り屑の処理性能を大幅に向上することができ、産
業上非常に有益である。According to the present invention, according to the present invention, the diamond film is coated only on the cutting edge portion of the cutting tool and on the working portion of the cutting tool centering on the vicinity of the cutting edge portion, and then the lubricating film is coated to form a diamond film. It was possible to prevent welding of the work piece starting from the uneven surface of the film surface, and to minimize the welding of the work piece without impairing the wear resistance of the cutting edge. And by coating these films, while utilizing the high wear resistance of diamond in the cutting edge part of the cutting tool and the vicinity of the cutting edge part, the chip discharge at the part not directly involved in the direct cutting It is possible to improve the quality of the chip and to greatly improve the chip disposal performance, which is very useful in industry.
【０００６】好ましくは、本発明によるダイヤモンド被
覆上及び超硬基体上への保護膜としては、ダイヤモンド
とよく似た性質をもつDLC(diamond like carbon)膜
や、それに類似した膜の適用が挙げられる。DLC 膜の硬
度はダイヤモンドには及ばないものの、高いものでビッ
カーズ硬度4000に達するものもあり、更に摩擦係数も0.
1 程度で低い。また、ダイヤモンドと比較して際立って
いるのは表面粗さがナノメーターオーダーであり、表面
平滑性において特に優れている。このような性質をもつ
膜には、他にSiC/C 、TiC/C 、WC/C、Mo/C、Cr/C、Mo/
C、Zr/Cなどが挙げられ、さらに、DLC 中にさらにSi、T
i、W 、Cr、Mo、Zrのいずれかの炭化物、酸化物を含む
ものであってもよい。[0006] Preferably, as the protective film on the diamond coating and the superhard substrate according to the present invention, application of a DLC (diamond like carbon) film having a property very similar to diamond or a film similar thereto can be mentioned. . Although the hardness of DLC film is not as high as that of diamond, some of them are as high as Vickers hardness of 4000, and the coefficient of friction is 0.
It is about 1 and low. Moreover, the surface roughness is in the order of nanometers, which is outstanding compared to diamond, and is particularly excellent in surface smoothness. Other films with such properties include SiC / C, TiC / C, WC / C, Mo / C, Cr / C, Mo /
C, Zr / C, etc., and further Si, T in DLC.
It may contain a carbide or oxide of any one of i, W, Cr, Mo and Zr.
【０００７】さらに好ましくは、保護膜と基体表面との
密着性を高めるために中間層を介するようにし、この中
間層は、Si、Ti、W 、Mo、Zrの単体、あるいはこれら元
素の一種又は二種以上の炭化物の単層又は複層を含むも
のであってもよい。なお、これらDLC 保護膜、中間層膜
の被覆は真空蒸着法、イオンプレーティング法、スパッ
タ蒸着法などの物理蒸着法、熱CVD 法、プラズマCVD 法
などの各種CVD 法などの様々な公知の方法で行うことが
できる。More preferably, an intermediate layer is interposed in order to enhance the adhesion between the protective film and the surface of the substrate, and the intermediate layer is a simple substance of Si, Ti, W, Mo or Zr, or one of these elements or It may include a single layer or multiple layers of two or more kinds of carbides. The DLC protective film and the intermediate layer film are coated by various known methods such as a vacuum vapor deposition method, an ion plating method, a physical vapor deposition method such as a sputter vapor deposition method, a thermal CVD method, and various CVD methods such as a plasma CVD method. Can be done at.
【０００８】[0008]
【発明の実施の形態】実施例1
直径6mm の超硬合金製ドリルを用い、先ずこのドリルの
主切れ刃の逃げ面及び先端から6mm までのマージン部に
マイクロ波プラズマCVD 法によりダイヤモンド膜を5 μ
m の厚さで被覆した。次いで中間層として炭化チタン膜
を1 μm 、その後保護膜としての炭化珪素膜をドリル先
端から18mmまでの範囲で3 μm の厚さでイオンプレーテ
ィング法により被覆処理した。比較のために同じ寸法の
直径6mm の超硬合金製ドリルを用いて、ドリルの先端か
ら6mm までの表面全体にダイヤモンド膜のみを5 μm の
厚さで被覆した。本発明のドリル及び比較のために制作
したドリルの両者を用いてアルミ合金板の穴明け加工を
行った。加工の条件は以下の通りである。
被加工材 アルミ合金(ADC12)
板 厚 20mm
回転速度 100m/min
送り速度 478mm/min
切削油 なし( エアーブロー)
加工試験の結果、本発明のドリルは切り屑の流れが良
く、穴の精度も安定していた。これに対し、比較ドリル
は切り屑が太く曲がり、詰まり気味となるとともに切削
抵抗も増えた。また、折損までの穴加工数も本発明品が
比較ドリルに対して4 倍以上、長寿命であった。BEST MODE FOR CARRYING OUT THE INVENTION Example 1 Using a cemented carbide drill having a diameter of 6 mm, first, a diamond film was formed on the flank of the main cutting edge of this drill and a margin part up to 6 mm from the tip by a microwave plasma CVD method. μ
It was coated to a thickness of m. Then, a titanium carbide film as an intermediate layer was coated to a thickness of 1 μm, and then a silicon carbide film as a protective film was coated by ion plating to a thickness of 3 μm within a range from the drill tip to 18 mm. For comparison, a 6 mm diameter cemented carbide drill of the same dimensions was used to coat only the diamond film to a thickness of 5 μm over the entire surface from the drill tip to 6 mm. The aluminum alloy plate was drilled using both the drill of the present invention and the drill produced for comparison. The processing conditions are as follows. Work material Aluminum alloy (ADC12) Plate thickness 20 mm Rotation speed 100 m / min Feed rate 478 mm / min No cutting oil (air blow) As a result of processing test, the drill of the present invention has good chip flow and stable hole accuracy. Was. On the other hand, in the comparative drill, the chips became thick and bent, and it became clogged, and the cutting resistance increased. Further, the number of drilled holes up to breakage was 4 times or more as compared with the comparative drill, and the service life was long.
【０００９】実施例2
直径3mm の超硬合金製ドリルを用意し、まずドリルの主
切れ刃の第1 逃げ面及び先端から6mm までのマージン部
に熱フィラメントCVD 法にてダイヤモンド膜を15μm の
厚さで被覆し、その後熱CVD 法にて炭化チタン膜を3 μ
m の厚さで被覆した。又、比較用として同じ寸法の直径
3mm の超硬合金製ドリルに先端から6mmの部分にダイヤ
モンドのみを15μm の厚さで被覆しただけのものを作製
した。本発明のドリル及び従来法による比較ドリルを用
いて圧延アルミの穴加工試験を行った。加工条件は以下
の通りである。
被加工材 アルミ合金(A5052)
板厚 10mm
回転速度 188.4m/min
送り速度 900mm/min
切削油 なし( エアーブロー)
試験の結果、本発明ドリルは切れ刃部のアルミの溶着が
少ないため切り屑の排出性が良く、その結果穴の寸法精
度も高かった。これに対し、比較ドリルは切れ刃部に大
量のアルミの溶着がみられ、その結果、太く長い切り屑
がドリルの溝にからみつき、短時間で折損に至った。Example 2 A cemented carbide drill having a diameter of 3 mm was prepared. First, a diamond film having a thickness of 15 μm was formed on the first flank of the main cutting edge of the drill and a margin portion up to 6 mm from the tip by a hot filament CVD method. And then a titanium carbide film with a thickness of 3 μm by the thermal CVD method.
It was coated to a thickness of m. Also, the diameter of the same size for comparison
We prepared a 3 mm cemented carbide drill with a diamond thickness of 15 μm coated only 6 mm from the tip. A hole drilling test was performed on rolled aluminum using the drill of the present invention and a comparative drill according to a conventional method. The processing conditions are as follows. Work material Aluminum alloy (A5052) Plate thickness 10 mm Rotational speed 188.4 m / min Feeding speed 900 mm / min No cutting oil (air blow) As a result of the test, the drill of the present invention showed less aluminum adhesion at the cutting edge and Ejectability was good, and as a result, hole dimensional accuracy was high. On the other hand, in the comparative drill, a large amount of aluminum was welded to the cutting edge portion, and as a result, thick and long chips caught in the groove of the drill, resulting in breakage in a short time.
【００１０】いずれの実施例においても、本発明の方法
によれば、切削工具の切れ刃部及び切れ刃部の近傍を中
心とする切削工具の作用部にのみダイヤモンド膜を被覆
したのち潤滑膜を被覆することによって、切れ刃部の耐
摩耗性を損なうことなく被削物の溶着を最小限に抑える
ことができた。さらにダイヤモンド被覆部以外の部分に
も潤滑膜が被覆されることから切り屑の処理性能を大幅
に向上することができた。In any of the embodiments, according to the method of the present invention, the diamond film is coated only on the cutting edge portion of the cutting tool and the action portion of the cutting tool centering around the cutting edge portion, and then the lubricating film is formed. By coating, welding of the work piece could be minimized without impairing the wear resistance of the cutting edge. Further, since the lubricating film is coated on the portion other than the diamond coating portion, the chip processing performance can be greatly improved.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3C046 FF03 FF12 FF17 HH08 4K029 AA04 BA01 BA11 BA17 BA34 BA35 BB02 BC00 BD05 4K030 BA06 BA12 BA18 BA20 BA22 BA28 BA29 BB12 CA03 LA22 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 3C046 FF03 FF12 FF17 HH08 4K029 AA04 BA01 BA11 BA17 BA34 BA35 BB02 BC00 BD05 4K030 BA06 BA12 BA18 BA20 BA22 BA28 BA29 BB12 CA03 LA22
Claims (6)
刃部近傍にダイヤモンド被覆膜を形成し、次いで該ダイ
ヤモンド被覆部を含む基体表面に潤滑性に優れた保護膜
を被覆することを特徴とするダイヤモンド被覆切削工
具。1. A diamond coating film is formed on a cutting edge of a cemented carbide cutting tool substrate and in the vicinity of the cutting edge portion, and then a surface of the substrate including the diamond coating portion is coated with a protective film having excellent lubricity. A diamond-coated cutting tool characterized by.
う）であることを特徴とする請求項1 記載のダイヤモン
ド被覆切削工具。2. The diamond-coated cutting tool according to claim 1, wherein the protective film is a hard carbon film (hereinafter referred to as DLC).
Cr、Mo、Zrを含む膜であることを特徴とする請求項２記
載のダイヤモンド被覆切削工具。3. The protective film comprises Si, Ti, W, and
The diamond-coated cutting tool according to claim 2, which is a film containing Cr, Mo, and Zr.
i、W 、Cr、Mo、Zrのいずれかの炭化物、酸化物を含む
ことを特徴とする請求項３記載のダイヤモンド被覆切削
工具。4. The protective film further comprises Si, T in the DLC.
The diamond-coated cutting tool according to claim 3, which contains a carbide or oxide of any one of i, W, Cr, Mo, and Zr.
ために中間層を介することを特徴とする請求項２記載の
ダイヤモンド被覆切削工具。5. The diamond-coated cutting tool according to claim 2, wherein an intermediate layer is interposed in order to enhance the adhesion between the protective film and the surface of the substrate.
体、あるいは前記元素の一種又は二種以上の炭化物の単
層又は複層から構成されている請求項３記載のダイヤモ
ンド被覆切削工具。6. The diamond according to claim 3, wherein the intermediate layer is composed of a simple substance of Si, Ti, W, Mo and Zr, or a single layer or multiple layers of one or more kinds of the above-mentioned elements. Coated cutting tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216459A JP2003025117A (en) | 2001-07-17 | 2001-07-17 | Diamond coated cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216459A JP2003025117A (en) | 2001-07-17 | 2001-07-17 | Diamond coated cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003025117A true JP2003025117A (en) | 2003-01-29 |
Family
ID=19050933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001216459A Pending JP2003025117A (en) | 2001-07-17 | 2001-07-17 | Diamond coated cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003025117A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009082993A (en) * | 2007-09-27 | 2009-04-23 | Kyocera Corp | Surface-coated tool |
| US7650976B2 (en) | 2003-08-22 | 2010-01-26 | Nissan Motor Co., Ltd. | Low-friction sliding member in transmission, and transmission oil therefor |
| CN101818332A (en) * | 2010-03-23 | 2010-09-01 | 中国地质大学（北京） | Super-hard self-lubricating diamond/diamond-like composite laminated coating material and preparation method thereof |
| EP2230327A1 (en) | 2009-02-23 | 2010-09-22 | Union Tool Co. | Diamond coating for cutting tool |
| US8206035B2 (en) | 2003-08-06 | 2012-06-26 | Nissan Motor Co., Ltd. | Low-friction sliding mechanism, low-friction agent composition and method of friction reduction |
| CN102650053A (en) * | 2012-04-25 | 2012-08-29 | 上海交通大学 | Manufacturing method for CVD (Chemical Vapor Deposition) diamond/diamond-like composite coating tool with complex shape |
| CN103225064A (en) * | 2012-10-22 | 2013-07-31 | 安庆帝伯格茨活塞环有限公司 | Preparation method of diamond-like coating piston ring |
| US8575076B2 (en) | 2003-08-08 | 2013-11-05 | Nissan Motor Co., Ltd. | Sliding member and production process thereof |
| EP2671967A1 (en) | 2012-06-07 | 2013-12-11 | Union Tool Co. | Diamond film for cutting-tools |
| EP2868413A1 (en) | 2013-10-31 | 2015-05-06 | Union Tool Co. | Hard-coated cutting tool |
| CN108728816A (en) * | 2017-04-18 | 2018-11-02 | 深圳先进技术研究院 | Wire-drawing die and preparation method thereof with a variety of coatings |
| EP3674441A1 (en) | 2018-12-25 | 2020-07-01 | Union Tool Co. | Diamond film for cutting tools |
-
2001
- 2001-07-17 JP JP2001216459A patent/JP2003025117A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8206035B2 (en) | 2003-08-06 | 2012-06-26 | Nissan Motor Co., Ltd. | Low-friction sliding mechanism, low-friction agent composition and method of friction reduction |
| US8575076B2 (en) | 2003-08-08 | 2013-11-05 | Nissan Motor Co., Ltd. | Sliding member and production process thereof |
| US7650976B2 (en) | 2003-08-22 | 2010-01-26 | Nissan Motor Co., Ltd. | Low-friction sliding member in transmission, and transmission oil therefor |
| JP2009082993A (en) * | 2007-09-27 | 2009-04-23 | Kyocera Corp | Surface-coated tool |
| EP2230327A1 (en) | 2009-02-23 | 2010-09-22 | Union Tool Co. | Diamond coating for cutting tool |
| CN101818332A (en) * | 2010-03-23 | 2010-09-01 | 中国地质大学（北京） | Super-hard self-lubricating diamond/diamond-like composite laminated coating material and preparation method thereof |
| CN102650053A (en) * | 2012-04-25 | 2012-08-29 | 上海交通大学 | Manufacturing method for CVD (Chemical Vapor Deposition) diamond/diamond-like composite coating tool with complex shape |
| EP2671967A1 (en) | 2012-06-07 | 2013-12-11 | Union Tool Co. | Diamond film for cutting-tools |
| US9061397B2 (en) | 2012-06-07 | 2015-06-23 | Union Tool Co. | Diamond film for cutting-tools |
| CN103225064A (en) * | 2012-10-22 | 2013-07-31 | 安庆帝伯格茨活塞环有限公司 | Preparation method of diamond-like coating piston ring |
| EP2868413A1 (en) | 2013-10-31 | 2015-05-06 | Union Tool Co. | Hard-coated cutting tool |
| KR20150050460A (en) | 2013-10-31 | 2015-05-08 | 유니온쓰루 가부시키가이샤 | Hard-coated cutting tool |
| US9868160B2 (en) | 2013-10-31 | 2018-01-16 | Union Tool Co. | Hard-coated cutting tool |
| EP2868413B1 (en) | 2013-10-31 | 2018-09-12 | Union Tool Co. | Hard-coated cutting tool |
| CN108728816A (en) * | 2017-04-18 | 2018-11-02 | 深圳先进技术研究院 | Wire-drawing die and preparation method thereof with a variety of coatings |
| EP3674441A1 (en) | 2018-12-25 | 2020-07-01 | Union Tool Co. | Diamond film for cutting tools |
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