JP2009090398A - Diamond-coated cutting tool having excellent lubricity and machining accuracy - Google Patents
Diamond-coated cutting tool having excellent lubricity and machining accuracy Download PDFInfo
- Publication number
- JP2009090398A JP2009090398A JP2007261980A JP2007261980A JP2009090398A JP 2009090398 A JP2009090398 A JP 2009090398A JP 2007261980 A JP2007261980 A JP 2007261980A JP 2007261980 A JP2007261980 A JP 2007261980A JP 2009090398 A JP2009090398 A JP 2009090398A
- Authority
- JP
- Japan
- Prior art keywords
- diamond
- tool
- coated
- coating layer
- 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.)
- Withdrawn
Links
Images
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Chemical Vapour Deposition (AREA)
- Drilling Tools (AREA)
Abstract
Description
この発明は、炭化タングステン基超硬合金または炭窒化チタン基サーメットからなる工具基体にダイヤモンド皮膜を被覆したダイヤモンド被覆切削工具に関し、特に、金属材料よりも比強度、比剛性の高いＣＦＲＰ（Carbon Fiber Reinforced Plastics。炭素繊維強化プラスチック）の高速切削に際し、すぐれた潤滑性を発揮するとともに、長期の使用に亘ってすぐれた加工精度を維持できるダイヤモンド被覆切削工具（以下、ダイヤモンド被覆工具という）に関するものである。 The present invention relates to a diamond-coated cutting tool in which a diamond coating is coated on a tool base made of tungsten carbide-based cemented carbide or titanium carbonitride-based cermet, and in particular, CFRP (Carbon Fiber Reinforced This is a diamond-coated cutting tool (hereinafter referred to as a diamond-coated tool) that exhibits excellent lubricity during high-speed cutting of carbon fiber reinforced plastic) and can maintain excellent processing accuracy over a long period of use. .
従来、炭化タングステン基（ＷＣ基）超硬合金または炭窒化チタン基（ＴｉＣＮ基）サーメットなどの工具基体に、ダイヤモンド皮膜を被覆したダイヤモンド被覆工具が知られており、このダイヤモンド被覆工具が、アルミニウム合金やマグネシウム合金などの非鉄材料の切削加工ですぐれた切削性能を発揮することが知られている。 Conventionally, a diamond coated tool in which a diamond coating is coated on a tool substrate such as a tungsten carbide group (WC group) cemented carbide or a titanium carbonitride group (TiCN group) cermet is known. This diamond coated tool is an aluminum alloy. It is known to exhibit excellent cutting performance in the cutting of non-ferrous materials such as magnesium alloys.
また、ダイヤモンド被覆工具を鉄系被削材の切削に用いた場合には、鉄とダイヤモンドが反応を起こし、被削材に浸炭が生じたり、ダイヤモンド皮膜が剥離したり、摩耗進行が促進されること等によって、十分な切削性能を発揮することができないという問題点があり、そこで、これを解決するため、例えば、ＷＣ基超硬合金またはＴｉＣＮ基サーメットで構成された工具基体の表面に、５〜２５μｍのダイヤモンド皮膜を被覆し、この上にさらに２〜６μｍの金属間化合物皮膜を被覆することにより、被削材である鉄系材料とダイヤモンドとの反応を防止し、浸炭、剥離等の発生を抑制し、工具寿命の改善を図ったダイヤモンド被覆工具も知られている。
近年の切削加工装置のＦＡ化はめざましく、一方で切削加工に対する省力化および省エネ化、さらに低コスト化の要求は強く、これに伴って、切削条件はますます高速化しているが、上記の従来被覆工具においては、これを通常条件での切削加工に用いた場合には問題はないが、これを一般の金属材料に比して、比強度、比剛性にすぐれるＣＦＲＰ等の高速切削に用いた場合には、ＣＦＲＰ自体が、炭素繊維とエポキシ系樹脂の複合材であることから工具摩耗が激しく、その結果、工具寿命が短くなり、また、被削材のバリ発生等により仕上げ面精度が粗くなり、かつ、寸法精度も劣るという問題点があった。 In recent years, the use of FA for cutting devices has been remarkable. On the other hand, there is a strong demand for labor saving, energy saving, and cost reduction for cutting processing, and along with this, cutting conditions are becoming increasingly faster. For coated tools, there is no problem when this is used for cutting under normal conditions, but this is used for high-speed cutting such as CFRP, which has superior specific strength and specific rigidity compared to general metal materials. In such a case, the CFRP itself is a composite material of carbon fiber and epoxy resin, so that the tool wears severely, resulting in a shortened tool life. There was a problem that it became rough and the dimensional accuracy was inferior.
そこで、本発明者等は、上述のような観点から、特に難削材であるＣＦＲＰの高速切削加工で、長期の使用に亘って、すぐれた加工精度（仕上げ面精度、寸法精度）とすぐれた耐摩耗性を備えるダイヤモンド被覆工具を開発すべく、上記従来のダイヤモンド被覆工具の被覆層に着目し研究を行った結果、以下の知見を得た。
図１（ａ）、（ｂ）に、それぞれ、この発明のダイヤモンド被覆工具の側断面の概略図および上面模式図を示すように、工具基体（図１（ａ）中、超硬母材で示す）の表面に、例えば、マイクロプラズマＣＶＤ法、フィラメントＣＶＤ法、アークプラズマＣＶＤ法等のダイヤモンド気相合成法によって、膜厚１〜１５μｍのダイヤモンド皮膜（図１（ａ）中、ＣＶＤ−Ｄｉａ皮膜で示す）を形成し、ついで、該ダイヤモンド皮膜の上面に、六方晶窒化ほう素（以下、ｈ−ＢＮで示す）、二硫化モリブデン（以下、ＭｏＳ２で示す）および窒化クロム（以下、ＣｒＮで示す）のいずれかからなる潤滑膜（図１（ａ）中、潤滑膜で示す）を蒸着形成することにより、上記ダイヤモンド皮膜を構成するダイヤモンド粒子の粒子間隙に、上記ｈ−ＢＮ、ＭｏＳ２、ＣｒＮを充填した潤滑皮膜を形成し、その後、潤滑皮膜表面にブラスト等を施し、ダイヤモンド粒子が、上記ｈ−ＢＮ、ＭｏＳ２、ＣｒＮからなるマトリックス中に分散して表面に露出存在する膜厚３〜５μｍの潤滑皮膜層を形成すると（図１（ｂ）は、△印で示されるダイヤモンド粒子が、ｈ−ＢＮ、ＭｏＳ２、ＣｒＮからなるマトリックス中に分散存在する状態を示す）、このようなダイヤモンド皮膜層と潤滑皮膜層からなる被覆層を形成したダイヤモンド被覆工具は、ダイヤモンド皮膜層によってその耐摩耗性が確保されるとともに、潤滑皮膜層が、潤滑性ばかりか、分散露出したダイヤモンド粒子によってすぐれた耐摩耗性を発揮することにより、難削材であるＣＦＲＰの高速切削加工においても、バリ等の発生もなくすぐれた仕上げ面精度、寸法精度で加工をすることができ、また、長期の使用に亘ってすぐれた耐摩耗性を発揮すること。
Therefore, the inventors of the present invention have excellent machining accuracy (finished surface accuracy, dimensional accuracy) over a long period of use, particularly in high-speed cutting of CFRP, which is a difficult-to-cut material, from the above viewpoint. In order to develop a diamond-coated tool with wear resistance, the following knowledge was obtained as a result of research conducted focusing on the coating layer of the conventional diamond-coated tool.
As shown in FIGS. 1 (a) and 1 (b), respectively, a schematic side view and a schematic top view of a diamond-coated tool of the present invention are shown as a tool base (in FIG. 1 (a), a carbide base material). ) By a diamond gas phase synthesis method such as a microplasma CVD method, a filament CVD method, an arc plasma CVD method or the like, with a diamond film having a film thickness of 1 to 15 μm (in FIG. 1A, a CVD-Dia film). Then, on the upper surface of the diamond film, hexagonal boron nitride (hereinafter referred to as h-BN), molybdenum disulfide (hereinafter referred to as MoS 2 ), and chromium nitride (hereinafter referred to as CrN). ) To form the above-mentioned h-BN in the interstices of the diamond particles constituting the diamond film by vapor deposition of a lubricating film (shown by the lubricating film in FIG. 1A). MoS 2, to form a lubricating film filled with CrN, then subjected to blasting the lubricating film surface, the diamond particles are exposed present on the h-BN, the surface dispersed in a matrix of the MoS 2, CrN When a lubricating coating layer having a thickness of 3 to 5 μm is formed (FIG. 1B shows a state in which diamond particles indicated by Δ are dispersed in a matrix composed of h-BN, MoS 2 , and CrN). A diamond-coated tool having a coating layer composed of such a diamond coating layer and a lubricating coating layer ensures the wear resistance of the diamond coating layer, and the lubricating coating layer has not only lubricity but also dispersed and exposed diamond. By exhibiting excellent wear resistance due to particles, burrs and the like are not generated even in high-speed cutting of CFRP, which is a difficult-to-cut material. Capable of machining with excellent finished surface accuracy and dimensional accuracy, and exhibiting excellent wear resistance over a long period of use.
この発明は、上記知見に基づいてなされたものであって、
「 炭化タングステン基（ＷＣ基）超硬合金または炭窒化チタン基（ＴｉＣＮ基）サーメットで構成された工具基体表面に、１〜１５μｍの膜厚のダイヤモンド皮膜層と３〜５μｍの膜厚の潤滑皮膜層が形成されたダイヤモンド被覆切削工具において、
上記潤滑皮膜層は、六方晶窒化ホウ素（ｈ−ＢＮ）、二硫化モリブデン（ＭｏＳ２）または窒化クロム（ＣｒＮ）のいずれかからなるマトリックス相中に、１５〜５０面積％のダイヤモンド粒子が表面に露出して存在することを特徴とする潤滑性および加工精度にすぐれたダイヤモンド被覆切削工具（ダイヤモンド被覆工具）。」
に特徴を有するものである。
This invention has been made based on the above findings,
“A diamond coating layer having a thickness of 1 to 15 μm and a lubricating coating having a thickness of 3 to 5 μm on the surface of a tool base composed of a tungsten carbide group (WC group) cemented carbide or a titanium carbonitride group (TiCN group) cermet. In a diamond-coated cutting tool with a layer formed,
The lubricating coating layer has 15 to 50 area% diamond particles on the surface in a matrix phase composed of either hexagonal boron nitride (h-BN), molybdenum disulfide (MoS 2 ), or chromium nitride (CrN). A diamond-coated cutting tool (diamond-coated tool) with excellent lubricity and processing accuracy characterized by being exposed. "
It has the characteristics.
つぎに、この発明のダイヤモンド被覆工具の被覆層について、詳細に説明する。 Next, the coating layer of the diamond-coated tool of the present invention will be described in detail.
ダイヤモンド皮膜層；
ダイヤモンド皮膜層は、それ自体が有する高硬度特性により、基本的にダイヤモンド被覆工具の耐摩耗性を確保し、使用寿命を向上せしめるための層であるが、ダイヤモンド皮膜の膜厚が１μｍ未満では、上記所望の作用効果が得られず、一方その膜厚が１５μｍを越えると、ダイヤモンド皮膜自体の内部応力の増大による基体との剥離現象の発生や、チッピング（微小欠け）が発生し易くなることから、その膜厚は、１〜１５μｍと定めた。
なお、ダイヤモンド皮膜の成膜は、気相合成法等の既に知られているいかなる方法で行っても良く、その成膜法が特に限定されるものではないが、潤滑膜をダイヤモンド粒子間に十分に充填するために、成膜するダイヤモンド粒子の大きさは、直径１〜３μｍとすることが望ましい。これは、ダイヤモンド粒子径が１μｍ未満では、ダイヤモンド粒子間の凹凸が少ないために潤滑成分の充填が不十分となり、所望の切削性能を得ることができず、また、ダイヤモンド粒子径が３μｍを超えると、ダイヤモンド粒子の脱離に伴う潤滑膜の剥離が発生し、所望の切削性能を得ることができないという理由による。
Diamond coating layer;
The diamond coating layer is basically a layer for ensuring the wear resistance of the diamond-coated tool and improving the service life due to its high hardness characteristics. However, when the diamond coating thickness is less than 1 μm, If the desired effect is not obtained, on the other hand, if the film thickness exceeds 15 μm, a peeling phenomenon from the substrate due to an increase in internal stress of the diamond film itself and chipping (minute chipping) are likely to occur. The film thickness was determined to be 1 to 15 μm.
The diamond film may be formed by any known method such as a gas phase synthesis method, and the film forming method is not particularly limited. In order to fill the film, it is desirable that the diamond particles to be formed have a diameter of 1 to 3 μm. This is because when the diamond particle diameter is less than 1 μm, the unevenness between the diamond particles is small, so that the lubrication component is insufficiently filled and the desired cutting performance cannot be obtained, and when the diamond particle diameter exceeds 3 μm. This is because the lubricant film is peeled off due to the detachment of the diamond particles, and the desired cutting performance cannot be obtained.
潤滑膜；
ｈ−ＢＮ、ＭｏＳ２、ＣｒＮこれら自体が潤滑性を有することは良く知られているが、本発明では、上記ダイヤモンド皮膜の上面に、ｈ−ＢＮ、ＭｏＳ２、ＣｒＮのいずれかからなる潤滑膜を形成し、その際同時にダイヤモンド粒子の粒子間隙に、これらの潤滑膜成分を充填する。
潤滑膜は、例えば、ＡＩＰ法、スパッタ法、プラズマＣＶＤ法等によって形成することができる。
Lubricating film;
Although it is well known that h-BN, MoS 2 , and CrN themselves have lubricity, in the present invention, a lubricating film made of any of h-BN, MoS 2 , and CrN is formed on the upper surface of the diamond film. At the same time, these lubricating film components are filled in the particle gaps of the diamond particles.
The lubricating film can be formed by, for example, an AIP method, a sputtering method, a plasma CVD method, or the like.
潤滑皮膜層；
ダイヤモンド皮膜上面に上記潤滑膜を形成し、同時に、ダイヤモンド粒子間隙に潤滑膜成分を充填した後、ブラストを施し、潤滑膜の表層を一部除去し、ダイヤモンド粒子を表面に露出存在させた潤滑皮膜層を３〜５μｍの膜厚で形成する。
潤滑皮膜層の膜厚が３μｍ未満では、十分な潤滑性能を発揮することはできず、一方、膜厚が５μｍを超えると、長期間の切削加工による膜厚変化のため、寸法精度が低下することから、潤滑皮膜層の膜厚は３〜５μｍと定めた。
また、潤滑皮膜層表面を観察した場合に、ダイヤモンド粒子が露出存在する面積割合は、１５〜５０面積％とすることが必要であり、ダイヤモンド粒子が露出存在する面積割合が１５面積％未満の場合には、潤滑皮膜層の耐摩耗性が不足し、ＣＦＲＰ等の高速切削加工において、工具摩耗による寸法精度の劣化が生じ、一方、ダイヤモンド粒子が露出存在する面積割合が５０面積％を超えると、潤滑皮膜層の潤滑性が不足し、バリ発生等により穴径精度が低下するので、面積割合は、１５〜５０面積％と定めた。
Lubricating film layer;
Lubricating film in which the above lubricating film is formed on the upper surface of the diamond film, and at the same time, the lubricating film component is filled in the diamond particle gap, and then blasted to partially remove the surface layer of the lubricating film so that the diamond particles are exposed on the surface. The layer is formed with a film thickness of 3 to 5 μm.
If the film thickness of the lubricating coating layer is less than 3 μm, sufficient lubrication performance cannot be exhibited. On the other hand, if the film thickness exceeds 5 μm, the dimensional accuracy decreases due to the film thickness change due to long-term cutting. For this reason, the thickness of the lubricating coating layer was determined to be 3 to 5 μm.
When the surface of the lubricating coating layer is observed, the area ratio where the diamond particles are exposed needs to be 15 to 50 area%, and the area ratio where the diamond particles are exposed is less than 15 area%. In such a case, the wear resistance of the lubricant film layer is insufficient, and in high-speed cutting such as CFRP, dimensional accuracy is deteriorated due to tool wear. On the other hand, when the area ratio where the diamond particles are exposed exceeds 50 area%, Since the lubricity of the lubricating coating layer is insufficient and the hole diameter accuracy is reduced due to the occurrence of burrs, the area ratio is determined to be 15 to 50 area%.
この発明のダイヤモンド被覆工具は、ダイヤモンド皮膜層が耐摩耗性を備え、その上に設けられた潤滑皮膜層が潤滑性と耐摩耗性を相兼ね備えるので、これをＣＦＲＰ等の難削材の高速切削に用いた場合にも、加工精度にすぐれ、かつ、長期の使用に亘ってすぐれた耐摩耗性を発揮するものである。 In the diamond-coated tool of the present invention, the diamond coating layer has wear resistance, and the lubricating coating layer provided thereon has both lubricity and wear resistance. Therefore, this is used for high-speed cutting of difficult-to-cut materials such as CFRP. Even when used in the above, it has excellent processing accuracy and excellent wear resistance over a long period of use.
つぎに、この発明のダイヤモンド被覆工具を実施例により具体的に説明する。 Next, the diamond-coated tool of the present invention will be specifically described with reference to examples.
原料粉末として、平均粒径：５．５μｍを有する中粗粒ＷＣ粉末、同０．８μｍの微粒ＷＣ粉末、同１．３μｍのＴａＣ粉末、同１．２μｍのＮｂＣ粉末、同１．２μｍのＺｒＣ粉末、同２．３μｍのＣｒ３Ｃ２粉末、同１．５μｍのＶＣ粉末、同１．０μｍの（Ｔｉ，Ｗ）Ｃ［質量比で、ＴｉＣ／ＷＣ＝５０／５０］粉末、および同１．８μｍのＣｏ粉末を用意し、これら原料粉末をそれぞれ表１に示される配合組成に配合し、さらにワックスを加えてアセトン中で２４時間ボールミル混合し、減圧乾燥した後、１００ＭＰａの圧力で所定形状の各種の圧粉体にプレス成形し、これらの圧粉体を、６Ｐａの真空雰囲気中、７℃／分の昇温速度で１３７０〜１４７０℃の範囲内の所定の温度に昇温し、この温度に１時間保持後、炉冷の条件で焼結して、直径が８ｍｍ、１３ｍｍ、および２６ｍｍの３種の工具基体形成用丸棒焼結体を形成し、さらに前記の３種の丸棒焼結体から、研削加工にて、表１に示される組合せで、切刃部の直径×長さがそれぞれ６ｍｍ×１３ｍｍ、１０ｍｍ×２２ｍｍ、および２０ｍｍ×４５ｍｍの寸法、並びにいずれもねじれ角４５度の４枚刃スクエア形状をもったＷＣ基超硬合金製の工具基体（エンドミル）Ｃ−１〜Ｃ−８をそれぞれ製造した。 As raw material powders, medium coarse WC powder having an average particle diameter of 5.5 μm, fine WC powder of 0.8 μm, TaC powder of 1.3 μm, NbC powder of 1.2 μm, ZrC of 1.2 μm Powder, 2.3 μm Cr 3 C 2 powder, 1.5 μm VC powder, 1.0 μm (Ti, W) C [by mass ratio, TiC / WC = 50/50] powder, and 1 .8 μm Co powder was prepared, each of these raw material powders was blended in the blending composition shown in Table 1, added with wax, ball milled in acetone for 24 hours, dried under reduced pressure, and then pressed into a predetermined shape at a pressure of 100 MPa. The green compacts were press-molded, and these green compacts were heated to a predetermined temperature in the range of 1370 to 1470 ° C. at a rate of temperature increase of 7 ° C./min in a 6 Pa vacuum atmosphere. After holding at temperature for 1 hour, sintering under furnace cooling conditions Thus, three types of tool base forming round bar sintered bodies having diameters of 8 mm, 13 mm, and 26 mm are formed, and further, the three kinds of round bar sintered bodies are shown in Table 1 by grinding. In combination, the diameter x length of the cutting edge is 6 mm x 13 mm, 10 mm x 22 mm, and 20 mm x 45 mm, respectively, and each is made of a WC-based cemented carbide with a 4-flute square shape with a twist angle of 45 degrees Tool bases (end mills) C-1 to C-8 were produced.
ついで、これらの工具基体（エンドミル）Ｃ−１〜Ｃ−８の表面をアセトン中で超音波洗浄し、乾燥した状態で、
（ａ）まず、金属Ｗフィラメントを内部に備えたダイヤモンド気相合成被覆装置に装入し、
雰囲気圧力：２０ Ｔｏｒｒ、
工具基体温度：８５０ ℃、
反応ガス：ＣＨ３ １容量％、残部：Ｈ２、
ガス流量：０．５ ｌ／ｓｅｃ、
の条件に保持し、
第１段階として、金属Ｗフィラメントを１８５０〜２０５０（℃）×０．２〜４（ｈｒ）保持し、
第２段階として、前記温度から２１００〜２４００（℃）の温度範囲に０．１〜１（ｈｒ）で昇温し、
第３段階として、上記温度範囲で３〜３０（ｈｒ）保持することにより、表 に示される膜厚のダイヤモンド皮膜層を形成し、
（ｂ）ついで、これを、ｈ−ＢＮ、ＭｏＳ２、ＣｒＮのいずれかからなるスパッタリングターゲットを内部に備えるマグネトロンスパッタリング装置に装入し、まず装置内を排気して０．５Ｐａ以下の真空に保持しながら、ヒーターで装置内を５００℃に加熱した後、ダイヤモンド皮膜層を形成した工具基体に−１００Ｖの直流バイアス電圧を印加して、スパッタリングターゲット（ｈ−ＢＮ、ＭｏＳ２またはＣｒＮ）にパルス電源から３ｋＷのパルス電力を印加してｈ−ＢＮ、ＭｏＳ２またはＣｒＮをスパッタし、ダイヤモンド皮膜層上面に潤滑膜を形成し、
（ｃ）その後、Ａｌ２Ｏ３砥粒（粒度：２２０〜１５００メッシュ，含有量：１５〜６０ｗｔ％）、投射圧力：０．０８〜０．２４ＭＰａの条件で、潤滑膜表面にブラスト処理を施し、
工具基体の表面に、表２に示される目標膜厚のダイヤモンド皮膜層、また、同じく表２に示されるダイヤモンド露出面積割合および目標膜厚の潤滑皮膜層を形成することにより、本発明ダイヤモンド被覆工具としての本発明ダイヤモンド被覆エンドミル（以下、本発明エンドミルという）１〜８をそれぞれ製造した。
Next, the surfaces of these tool substrates (end mills) C-1 to C-8 were ultrasonically cleaned in acetone and dried,
(A) First, a diamond vapor synthesis coating apparatus equipped with a metal W filament inside is charged,
Atmospheric pressure: 20 Torr,
Tool substrate temperature: 850 ° C.
Reaction gas: 1% by volume of CH 3 , balance: H 2 ,
Gas flow rate: 0.5 l / sec,
In the condition of
As a first step, hold the metal W filament 1850-2050 (° C.) × 0.2-4 (hr),
As the second stage, the temperature is raised from 0.1 to 1 (hr) in the temperature range of 2100 to 2400 (° C.),
As a third stage, a diamond film layer having a film thickness shown in the table is formed by maintaining 3 to 30 (hr) in the above temperature range,
(B) Next, this is loaded into a magnetron sputtering apparatus equipped with a sputtering target made of h-BN, MoS 2 , or CrN, and the apparatus is first evacuated and kept at a vacuum of 0.5 Pa or less. However, after heating the inside of the apparatus to 500 ° C. with a heater, a DC bias voltage of −100 V is applied to the tool substrate on which the diamond coating layer is formed, and a pulse power source is applied to the sputtering target (h-BN, MoS 2 or CrN). To apply a pulse power of 3 kW to sputter h-BN, MoS 2 or CrN, and form a lubricating film on the upper surface of the diamond coating layer.
(C) Thereafter, the lubricating film surface was blasted under conditions of Al 2 O 3 abrasive grains (particle size: 220-1500 mesh, content: 15-60 wt%), projection pressure: 0.08-0.24 MPa. ,
The diamond coated tool of the present invention is formed on the surface of the tool base by forming the diamond coating layer having the target film thickness shown in Table 2 and the lubricant coating layer having the diamond exposed area ratio and the target film thickness similarly shown in Table 2. The present invention diamond-coated end mills (hereinafter referred to as the present invention end mills) 1 to 8 were produced.
また、比較の目的で、上記の工具基体（エンドミル）Ｃ−１、Ｃ−２、Ｃ−５、Ｃ−６の表面をアセトン中で超音波洗浄し、乾燥した状態で、上記実施例１と同一の条件で、上記工具基体（エンドミル）の表面に、表３に示される目標膜厚のダイヤモンド皮膜層を形成することにより、比較ダイヤモンド被覆工具としての比較ダイヤモンド被覆エンドミル（以下、比較エンドミルという）１、２、５、６をそれぞれ製造した。 For the purpose of comparison, the surfaces of the tool bases (end mills) C-1, C-2, C-5, and C-6 were ultrasonically cleaned in acetone and dried. By forming a diamond coating layer having a target film thickness shown in Table 3 on the surface of the tool base (end mill) under the same conditions, a comparative diamond-coated end mill (hereinafter referred to as a comparative end mill) as a comparative diamond-coated tool. 1, 2, 5, and 6 were produced, respectively.
また、さらに比較の目的で、上記の工具基体（エンドミル）Ｃ−３、Ｃ−４、Ｃ−７、Ｃ−８の表面をアセトン中で超音波洗浄し、乾燥した状態で、上記実施例１と同一の条件で、上記工具基体（エンドミル）の表面に、表３に示される目標膜厚のダイヤモンド皮膜層を形成した後、同じく表３に示される成分系および目標膜厚の硬質皮膜層をアークイオンプレーティングで蒸着形成することにより、ダイヤモンド皮膜層と硬質皮膜層とを被覆した比較ダイヤモンド被覆工具としての比較ダイヤモンド被覆エンドミル（以下、比較エンドミルという）３、４、７、８をそれぞれ製造した。 Further, for the purpose of comparison, the surface of the above-mentioned tool base (end mill) C-3, C-4, C-7, C-8 was ultrasonically cleaned in acetone and dried, in the above-mentioned Example 1. The diamond coating layer having the target film thickness shown in Table 3 is formed on the surface of the tool base (end mill) under the same conditions as above, and then the component system and the hard coating layer having the target film thickness shown in Table 3 are formed. Comparative diamond-coated end mills (hereinafter referred to as comparative end mills) 3, 4, 7, and 8 as comparative diamond-coated tools coated with a diamond film layer and a hard film layer were produced by vapor deposition by arc ion plating, respectively. .
つぎに、上記本発明エンドミル１〜８および比較エンドミル１〜８のうち、
本発明エンドミル１〜４および比較エンドミル１〜４については、
被削材−平面寸法：１００ｍｍ×２５０ｍｍ、厚さ：５０ｍｍの、炭素繊維と熱硬化型エポキシ系樹脂が３５層の直交積層構造を持つ炭素繊維強化樹脂複合材（ＣＦＲＰ）の板材、
切削速度： ２５０ ｍ／ｍｉｎ．、
溝深さ（切り込み）： ７ ｍｍ、
テーブル送り： １２００ ｍｍ／分、
の条件での上記ＣＦＲＰの乾式高速側面切削加工試験、
本発明エンドミル５〜８および比較エンドミル５〜８については、
被削材−平面寸法：１００ｍｍ×２５０ｍｍ、厚さ：５０ｍｍの、炭素繊維と熱硬化型エポキシ系樹脂が４５層の直交積層構造を持つ炭素繊維強化樹脂複合材（ＣＦＲＰ）の板材、
切削速度： ３００ ｍ／ｍｉｎ．、
溝深さ（切り込み）： １５ ｍｍ、
テーブル送り： ２０００ ｍｍ／分、
の条件での上記ＣＦＲＰの乾式高速側面切削加工試験、
をそれぞれ行い、いずれの切削加工試験でも切刃部の欠損に伴う被削材のムシレが発生するまでの切削溝長を測定した。
これらの測定結果を表２、３にそれぞれ示した。
Next, of the present invention end mills 1-8 and comparative end mills 1-8,
For the present invention end mills 1-4 and comparative end mills 1-4,
Work material-Plane dimensions: 100 mm x 250 mm, thickness: 50 mm, carbon fiber reinforced resin composite material (CFRP) plate material having 35 layers of carbon fiber and thermosetting epoxy resin,
Cutting speed: 250 m / min. ,
Groove depth (cut): 7 mm,
Table feed: 1200 mm / min,
CFRP dry high speed side cutting test under the conditions of
For the present invention end mills 5-8 and comparative end mills 5-8,
Workpiece material-Plane dimensions: 100 mm x 250 mm, thickness: 50 mm, carbon fiber reinforced resin composite material (CFRP) plate material having 45 layers of carbon fiber and thermosetting epoxy resin,
Cutting speed: 300 m / min. ,
Groove depth (cut): 15 mm,
Table feed: 2000 mm / min,
CFRP dry high speed side cutting test under the conditions of
In each cutting test, the length of the cutting groove until the squeezing of the work material due to the chipping of the cutting edge portion occurred was measured.
These measurement results are shown in Tables 2 and 3, respectively.
上記の実施例１で製造した直径が８ｍｍ（工具基体Ｃ−１〜Ｃ−３形成用）、１３ｍｍ（工具基体Ｃ−４〜Ｃ−６形成用）、および２６ｍｍ（工具基体Ｃ−７、Ｃ−８形成用）の３種の丸棒焼結体を用い、この３種の丸棒焼結体から、研削加工にて、溝形成部の直径×長さがそれぞれ４ｍｍ×１３ｍｍ（工具基体Ｄ−１〜Ｄ−３）、８ｍｍ×２２ｍｍ（工具基体Ｄ−４〜Ｄ−６）、および１６ｍｍ×４５ｍｍ（工具基体Ｄ−７、Ｄ−８）の寸法、並びにいずれもねじれ角３０度の２枚刃形状をもったＷＣ基超硬合金製の工具基体（ドリル）Ｄ−１〜Ｄ−８をそれぞれ製造した。 The diameters manufactured in Example 1 were 8 mm (for forming the tool bases C-1 to C-3), 13 mm (for forming the tool bases C-4 to C-6), and 26 mm (tool bases C-7 and C). -8 for forming), and from these three types of round bar sintered bodies, the diameter x length of the groove forming part is 4 mm x 13 mm (tool base D) by grinding. −1 to D-3), 8 mm × 22 mm (tool base D-4 to D-6), and 16 mm × 45 mm (tool bases D-7 and D-8), and all having a twist angle of 30 degrees 2 WC-base cemented carbide tool bases (drills) D-1 to D-8 having a single-blade shape were produced, respectively.
ついで、これらの工具基体（ドリル）Ｄ−１〜Ｄ−８の切刃に、ホーニングを施し、アセトン中で超音波洗浄し、乾燥した後、上記実施例１と同一の条件で、工具基体（ドリル）Ｄ−１〜Ｄ−８の表面に、表４に示される目標膜厚のダイヤモンド皮膜層、また、同じく表４に示されるダイヤモンド露出面積割合および目標膜厚の潤滑皮膜層を形成することにより、本発明ダイヤモンド被覆工具としての本発明ダイヤモンド被覆ドリル（以下、本発明ドリルという）１〜８をそれぞれ製造した。 Subsequently, the cutting edges of these tool bases (drills) D-1 to D-8 are subjected to honing, ultrasonically cleaned in acetone, dried, and then subjected to the same conditions as in Example 1 above. Drill) On the surfaces of D-1 to D-8, a diamond coating layer having a target film thickness shown in Table 4 and a diamond coating area ratio and a lubricating coating layer having a target film thickness shown in Table 4 are also formed. Thus, diamond-coated drills of the present invention (hereinafter referred to as drills of the present invention) 1 to 8 as the diamond-coated tools of the present invention were produced, respectively.
また、比較の目的で、上記の工具基体（ドリル）Ｄ−１、Ｄ−２、Ｄ−５、Ｄ−６の表面に、ホーニングを施し、アセトン中で超音波洗浄し、乾燥した後、上記実施例１と同一の条件で、上記工具基体（ドリル）の表面に、表５に示される目標膜厚のダイヤモンド皮膜層を形成することにより、比較ダイヤモンド被覆工具としての比較ダイヤモンド被覆ドリル（以下、比較ドリルという）１、２、５、６をそれぞれ製造した。 For the purpose of comparison, honing is performed on the surface of the tool base (drill) D-1, D-2, D-5, D-6, ultrasonic cleaning in acetone, and drying. By forming a diamond coating layer having a target film thickness shown in Table 5 on the surface of the tool base (drill) under the same conditions as in Example 1, a comparative diamond-coated drill (hereinafter referred to as a comparative diamond-coated drill) (Referred to as comparative drills) 1, 2, 5, and 6 were manufactured.
また、さらに比較の目的で、上記の工具基体（ドリル）Ｄ−３、Ｄ−４、Ｄ−７、Ｄ−８の表面をアセトン中で超音波洗浄し、乾燥した状態で、上記実施例１と同一の条件で、上記工具基体（ドリル）の表面に、表５に示される目標膜厚のダイヤモンド皮膜層を形成した後、同じく表５に示される成分系および目標膜厚の硬質皮膜層をアークイオンプレーティングで蒸着形成することにより、ダイヤモンド皮膜層と硬質皮膜層とを被覆した比較ダイヤモンド被覆工具としての比較ダイヤモンド被覆ドリル（以下、比較ドリルという）３、４、７、８をそれぞれ製造した。 Further, for the purpose of comparison, the surface of the above-mentioned tool base (drill) D-3, D-4, D-7, D-8 was ultrasonically cleaned in acetone and dried, and the above Example 1 was used. The diamond coating layer having the target film thickness shown in Table 5 is formed on the surface of the tool base (drill) under the same conditions as above, and then the component system and the hard coating layer having the target film thickness shown in Table 5 are formed. Comparative diamond-coated drills (hereinafter referred to as comparative drills) 3, 4, 7, and 8 were produced as comparative diamond-coated tools coated with a diamond coating layer and a hard coating layer by vapor deposition using arc ion plating. .
つぎに、上記本発明ドリル１〜８および比較ドリル１〜８のうち、
本発明ドリル１〜４および比較ドリル１〜４については、
被削材−平面寸法：１００ｍｍ×２５０ｍｍ、厚さ：１０ｍｍの、炭素繊維と熱硬化型エポキシ系樹脂が３５層の直交積層構造を持つ炭素繊維強化樹脂複合材（ＣＦＲＰ）の板材、
切削速度： １００ ｍ／ｍｉｎ．、
送り： ０．０５ ｍｍ／ｒｅｖ、
穴深さ： １０ ｍｍ、
の条件での上記ＣＦＲＰの乾式高速穴あけ切削加工試験、
本発明ドリル５〜８および比較ドリル５〜８については、
被削材−平面寸法：１００ｍｍ×２５０ｍｍ、厚さ：１５ｍｍの、炭素繊維と熱硬化型エポキシ系樹脂が４５層の直交積層構造を持つ炭素繊維強化樹脂複合材（ＣＦＲＰ）の板材、
切削速度： １６０ ｍ／ｍｉｎ．、
送り： ０．１ ｍｍ／ｒｅｖ、
穴深さ： １５ ｍｍ、
の条件での上記ＣＦＲＰの乾式高速穴あけ切削加工試験、
をそれぞれ行い、いずれの乾式高速穴あけ切削加工試験でも、加工穴寸法精度が０．０４ｍｍを超えるまでの穴あけ加工数を測定した。
この測定結果を表４、５にそれぞれ示した。
Next, among the above-described drills 1 to 8 and comparative drills 1 to 8,
About this invention drills 1-4 and comparative drills 1-4,
Work material-planar dimensions: 100 mm × 250 mm, thickness: 10 mm, carbon fiber reinforced resin composite material (CFRP) plate material having an orthogonal laminated structure of 35 layers of carbon fiber and thermosetting epoxy resin,
Cutting speed: 100 m / min. ,
Feed: 0.05 mm / rev,
Hole depth: 10 mm,
CFRP dry high-speed drilling test under the conditions of
About this invention drill 5-8 and comparative drills 5-8,
Work material-planar dimensions: 100 mm × 250 mm, thickness: 15 mm, carbon fiber reinforced resin composite material (CFRP) plate material having an orthogonal laminated structure of 45 layers of carbon fiber and thermosetting epoxy resin,
Cutting speed: 160 m / min. ,
Feed: 0.1 mm / rev,
Hole depth: 15 mm,
CFRP dry high-speed drilling test under the conditions of
In each dry high-speed drilling test, the number of drilling processes until the drilling hole dimension accuracy exceeded 0.04 mm was measured.
The measurement results are shown in Tables 4 and 5, respectively.
表２〜５に示される結果から、本発明ダイヤモンド被覆工具としての本発明エンドミル１〜８および本発明ドリル１〜８は、ダイヤモンド皮膜層上に、さらに、面積割合で１５〜５０％のダイヤモンドが露出存在する潤滑皮膜層が設けられているので、ＣＦＲＰ等の難削材の高速切削加工においても、仕上げ面精度、寸法精度に優れ、長期の使用に亘ってすぐれた耐摩耗性を発揮するのに対して、ダイヤモンド皮膜層のみが被覆された比較ダイヤモンド被覆工具としての比較エンドミル１、２、５、６および比較ドリル１、２、５、６においては、耐摩耗性については本発明ダイヤモンド被覆工具と同等の特性を示すものの、仕上げ面精度は非常に劣るものであり、また、ダイヤモンド皮膜層と硬質皮膜層とが被覆された比較エンドミル３、４、７、８および比較ドリル３、４、７、８においては、仕上げ面精度については本発明ダイヤモンド被覆工具と同等の特性を示すものの、寸法精度および耐摩耗性は非常に劣るものであった。 From the results shown in Tables 2 to 5, the present end mills 1 to 8 and the present drills 1 to 8 as the diamond coated tool of the present invention have 15 to 50% of diamond in an area ratio on the diamond coating layer. Since the exposed lubricant film layer is provided, even in high-speed cutting of difficult-to-cut materials such as CFRP, it has excellent finished surface accuracy and dimensional accuracy, and exhibits excellent wear resistance over a long period of use. On the other hand, in comparative end mills 1, 2, 5, 6 and comparative drills 1, 2, 5, 6 and comparative drills 1, 2, 5, 6 as comparative diamond-coated tools coated only with a diamond coating layer, the diamond-coated tool of the present invention is used for wear resistance. The finished end surface accuracy is very inferior, and a comparative end mill 3 coated with a diamond coating layer and a hard coating layer, In the 7,8 and comparative drill 3,4,7,8, although for surface finish according to the present invention diamond-coated tools and similar properties, dimensional accuracy and wear resistance it was as very poor.
上述のように、この発明のダイヤモンド被覆工具は、非鉄材料の通常条件での切削加工は勿論のこと、金属材料よりも比強度、比剛性の高いＣＦＲＰの高速切削においても、すぐれた潤滑性と耐摩耗性を発揮し、長期の使用に亘ってすぐれた加工精度（仕上げ面精度、寸法精度）を維持するものであるから、切削加工装置のＦＡ化、並びに切削加工の省力化および省エネ化、さらに低コスト化に十分満足に対応できるものである。 As described above, the diamond-coated tool of the present invention has excellent lubricity not only in cutting of non-ferrous materials under normal conditions, but also in high-speed cutting of CFRP having a higher specific strength and specific rigidity than metal materials. Since it exhibits wear resistance and maintains excellent processing accuracy (finished surface accuracy, dimensional accuracy) over a long period of use, it is possible to use FA for cutting equipment, labor saving and energy saving of cutting processing, Furthermore, it can cope with cost reduction sufficiently satisfactorily.
Claims (1)
上記潤滑皮膜層は、六方晶窒化ホウ素、二硫化モリブデンまたは窒化クロムのいずれかからなるマトリックス相中に、１５〜５０面積％のダイヤモンド粒子が表面に露出して存在することを特徴とする潤滑性および加工精度にすぐれたダイヤモンド被覆切削工具。 A diamond-coated cutting tool in which a diamond coating layer having a thickness of 1 to 15 μm and a lubricating coating layer having a thickness of 3 to 5 μm are formed on the surface of a tool base made of tungsten carbide-based cemented carbide or titanium carbonitride-based cermet. In
The lubricating coating layer is characterized in that 15 to 50 area% of diamond particles are exposed on the surface in a matrix phase composed of hexagonal boron nitride, molybdenum disulfide or chromium nitride. Diamond coated cutting tool with excellent machining accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007261980A JP2009090398A (en) | 2007-10-05 | 2007-10-05 | Diamond-coated cutting tool having excellent lubricity and machining accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007261980A JP2009090398A (en) | 2007-10-05 | 2007-10-05 | Diamond-coated cutting tool having excellent lubricity and machining accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2009090398A true JP2009090398A (en) | 2009-04-30 |
Family
ID=40662905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007261980A Withdrawn JP2009090398A (en) | 2007-10-05 | 2007-10-05 | Diamond-coated cutting tool having excellent lubricity and machining accuracy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2009090398A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012063318A1 (en) * | 2010-11-09 | 2012-05-18 | トーメイダイヤ株式会社 | Substrate for cvd diamond deposition and method for forming deposition surface |
| CN115607735A (en) * | 2022-10-12 | 2023-01-17 | 富地润滑科技股份有限公司 | Preparation method of titanium alloy antifriction coating, titanium alloy component and application |
-
2007
- 2007-10-05 JP JP2007261980A patent/JP2009090398A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012063318A1 (en) * | 2010-11-09 | 2012-05-18 | トーメイダイヤ株式会社 | Substrate for cvd diamond deposition and method for forming deposition surface |
| US9663851B2 (en) | 2010-11-09 | 2017-05-30 | Tomel Diamond Co., Ltd. | Substrate for CVD deposition of diamond and method for the preparation thereof |
| CN115607735A (en) * | 2022-10-12 | 2023-01-17 | 富地润滑科技股份有限公司 | Preparation method of titanium alloy antifriction coating, titanium alloy component and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4702520B2 (en) | Cutting tool made of surface-coated cemented carbide that provides excellent wear resistance with a hard coating layer in high-speed cutting of hardened steel | |
| JP5594575B2 (en) | Surface coated cutting tool with excellent wear resistance due to hard coating layer | |
| JP2009101491A (en) | Surface-coated cutting tool having hard coating layer exerting excellent lubricity and wear resistance in high-speed cutting | |
| JP2009061520A (en) | Surface-coated cutting tool with hard coating layer exhibiting excellent abrasion resistance in high-speed cutting | |
| JP4711177B2 (en) | Surface coated cemented carbide cutting tool with excellent wear resistance due to lubricity coating layer | |
| JP2006001006A (en) | Cutting tool made of surface coated cemented carbide with hard coating layer exhibiting excellent wear resistance in high speed cutting of high hardness steel | |
| JP5041222B2 (en) | Surface coated cutting tool | |
| JP5088480B2 (en) | Surface coated cutting tool | |
| JP2011152627A (en) | Surface-coated cutting tool having hard coating layer exhibiting excellent chipping resistance and wear resistance in high-speed heavy cutting | |
| JP2009090398A (en) | Diamond-coated cutting tool having excellent lubricity and machining accuracy | |
| JP4756445B2 (en) | Surface-coated cermet cutting tool with excellent wear resistance due to high-speed cutting of heat-resistant alloys | |
| JP4645819B2 (en) | Cutting tool made of surface-coated cemented carbide that provides excellent wear resistance with a hard coating layer in high-speed cutting of hardened steel | |
| JP2006224198A (en) | Cutting tool made of surface coated cemented carbide alloy with hard coating layer displaying excellent abrasion resistance in high speed cutting work of highly reactive work material | |
| JP4697389B2 (en) | Surface coated cemented carbide cutting tool with excellent wear resistance with hard coating layer in high speed cutting | |
| JP5099495B2 (en) | Surface coated cutting tool | |
| JP5234515B2 (en) | A surface-coated cutting tool with a hard coating layer that provides excellent fracture resistance and wear resistance | |
| JP5476842B2 (en) | A surface-coated cutting tool that exhibits excellent chipping and wear resistance with a high-speed heavy-cutting hard coating layer | |
| JP2009095916A (en) | Surface-coated cutting tool | |
| JP4645818B2 (en) | Cutting tool made of surface-coated cemented carbide with excellent wear resistance due to high-speed cutting of heat-resistant alloys | |
| JP2006001005A (en) | Cutting tool made of surface coated cemented carbide with hard coating layer exhibiting excellent wear resistance in high speed cutting of high hardness steel | |
| JP2008173750A (en) | Surface-coated cutting tool provided with hard coated layer achieving excellent wear resistance in high speed cutting | |
| JP2006001004A (en) | Cutting tool made of surface coated cemented carbide with hard coating layer exhibiting excellent wear resistance in high speed cutting of high hardness steel | |
| JP2006224216A (en) | Cutting tool made of surface coated cemented carbide alloy with hard coating layer displaying excellent abrasion resistance in high speed cutting work of heat resisting alloy | |
| JP4310693B2 (en) | Cutting tool made of surface-coated cemented carbide that provides excellent wear resistance with a hard coating layer in high-speed cutting of difficult-to-cut materials | |
| JP4621975B2 (en) | Surface-coated cemented carbide cutting tool with excellent wear resistance due to high-speed cutting and hard coating layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20101207 |