JPH11347804A - Milling device improved tipping resistance - Google Patents
Milling device improved tipping resistanceInfo
- Publication number
- JPH11347804A JPH11347804A JP15931898A JP15931898A JPH11347804A JP H11347804 A JPH11347804 A JP H11347804A JP 15931898 A JP15931898 A JP 15931898A JP 15931898 A JP15931898 A JP 15931898A JP H11347804 A JPH11347804 A JP H11347804A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- cutting edge
- cutting
- flank
- 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.)
- Granted
Links
Landscapes
- Milling Processes (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、表面被覆超硬合
金製切刃チップ（以下、単に切刃チップと云う）を鋼製
回転工具本体の先端部外周面に着脱自在に装着した形式
のミーリング工具にして、各種鋼のフライス加工を高速
高送りや高速高切り込みなどの高速重切削条件で行った
場合にも、前記切刃チップがすぐれた耐欠損性を発揮す
るミーリング工具に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a milling machine in which a surface coated cemented carbide cutting edge tip (hereinafter simply referred to as a cutting edge tip) is detachably mounted on the outer peripheral surface of the tip of a steel rotary tool body. The present invention relates to a milling tool in which the cutting edge tip exhibits excellent chipping resistance even when milling various kinds of steel under high-speed heavy cutting conditions such as high-speed high feed and high speed high cutting.
【０００２】[0002]
【従来の技術】従来、一般に、例えば図３（ａ）に底面
図および正面図で示されるように、鋼製回転工具本体の
先端部外周面に形成された切り欠き部に、同（ｂ）に縦
断面図および平面図で例示される切刃チップ、すなわち
超硬合金基体の表面に硬質被覆層を形成してなる切刃チ
ップをネジ止めなどの固着手段により着脱自在に装着し
た形式のミーリング工具が知られている。また、上記従
来ミーリング工具を構成する切刃チップが、図２に切刃
部が要部概略縦断面図で例示される通り、炭化タングス
テン基超硬合金基体（以下、超硬基体という）の表面
に、いずれも粒状結晶組織を有する、炭化チタン（以
下、ＴｉＣで示す）層、窒化チタン（以下、同じくＴｉ
Ｎで示す）層、炭窒化チタン（以下、ＴｉＣＮで示す）
層、炭酸化チタン（以下、ＴｉＣＯで示す）層、窒酸化
チタン（以下、ＴｉＮＯで示す）層、および炭窒酸化チ
タン（以下、ＴｉＣＮＯで示す）層のうちの１種または
２種以上からなるＴｉ化合物層と、同じく粒状結晶組織
を有する、α型酸化アルミニウム（以下、α−Ａｌ2 Ｏ
3 で示す）層および／またはκ型Ａｌ2 Ｏ3 層とで構成
された硬質被覆層を２〜６μｍの平均層厚で化学蒸着お
よび／または物理蒸着してなる構造を有することも知ら
れており、またこのミーリング工具が、鋼や鋳鉄などの
フライス加工に用いられていることも知られている。さ
らに、例えば特開平３−８７３６９号公報および特開平
６−８００８号公報などに記載されるように、上記従来
ミーリング工具を構成する切刃チップの硬質被覆層にお
いて、通常の化学蒸着法（ＨＴ−ＣＶＤ法）を用いて形
成していた上記ＴｉＣＮ層を、前記ＨＴ−ＣＶＤ法の蒸
着温度である１０００〜１１５０℃に比して相対的に低
温の７００〜９８０℃で蒸着を行う中温化学蒸着法（Ｍ
Ｔ−ＣＶＤ法）を用い、反応ガスとして有機炭窒化物を
含む混合ガスを使用して化学蒸着を行うことにより形成
した縦長成長結晶組織を有するＴｉＣＮ層に代えること
により硬質被覆層の靭性向上を図り、もって切刃部に欠
けやチッピング（微小欠け）などが発生するのを著しく
抑制した切刃チップも知られている。2. Description of the Related Art Conventionally, as shown in a bottom view and a front view, for example, in FIG. Milling of a type in which a cutting edge tip exemplified in a longitudinal sectional view and a plan view, that is, a cutting edge tip formed by forming a hard coating layer on the surface of a cemented carbide substrate is detachably mounted by a fixing means such as a screw. Tools are known. Further, as shown in FIG. 2, the cutting edge tip constituting the conventional milling tool has a surface of a tungsten carbide-based cemented carbide substrate (hereinafter referred to as a cemented carbide substrate) as shown in a schematic longitudinal sectional view of a main part of the cutting edge portion. A titanium carbide (hereinafter, referred to as TiC) layer and a titanium nitride (hereinafter, also referred to as TiC) each having a granular crystal structure.
N) layer, titanium carbonitride (hereinafter referred to as TiCN)
Layer, one or more of a titanium carbonate (hereinafter referred to as TiCO) layer, a titanium oxynitride (hereinafter referred to as TiNO) layer, and a titanium carbonitride (hereinafter referred to as TiCNO) layer Α-type aluminum oxide (hereinafter referred to as α-Al 2 O) having a Ti crystal layer and a granular crystal structure
3 ) and / or a κ-type Al 2 O 3 layer having a structure formed by chemical vapor deposition and / or physical vapor deposition with an average layer thickness of 2 to 6 μm. It is also known that this milling tool is used for milling steel or cast iron. Further, as described in, for example, JP-A-3-87369 and JP-A-6-8008, a conventional chemical vapor deposition method (HT- Medium temperature chemical vapor deposition in which the TiCN layer formed by using the CVD method is vapor-deposited at a relatively low temperature of 700 to 980 ° C. as compared with 1000 to 1150 ° C. which is the vapor deposition temperature of the HT-CVD method. (M
The T-CVD method is used to improve the toughness of the hard coating layer by substituting a TiCN layer having a vertically elongated crystal structure formed by performing chemical vapor deposition using a mixed gas containing an organic carbonitride as a reaction gas. There is also known a cutting edge chip in which the occurrence of chipping or chipping (small chipping) in the cutting edge portion is significantly suppressed.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の切削機械
の高性能化および高出力化はめざましく、かつ省力化お
よび省エネ化に対する要求も強く、これに伴い、フライ
ス加工は高速化すると共に、高送りや高切り込みなど重
切削化する傾向にあるが、上記の従来ミーリング工具に
おいては、各種鋼のフライス加工を、高速高送りや高速
高切り込みなどの高速重切削条件で行なうと、前記切刃
チップの切刃部に欠けやチッピングなどの欠損が発生し
易く、これが原因で比較的短時間で使用寿命に至るのが
現状である。On the other hand, in recent years, high performance and high output of cutting machines have been remarkable, and there is a strong demand for labor saving and energy saving. Although there is a tendency to perform heavy cutting such as feed and high cutting, in the above-mentioned conventional milling tools, when performing milling of various steels under high-speed heavy cutting conditions such as high-speed high-feed and high-speed high-cut, the cutting edge tip It is easy for chips such as chips or chippings to occur in the cutting edge portion, and the service life of the cutting edge can be shortened in a relatively short time.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、耐欠損性のすぐれたミーリング
工具を開発すべく、特にこれを構成する切刃チップに着
目し、研究を行った結果、 （ａ）上記の従来ミーリング工具を構成する切刃チップ
においては、超硬基体表面への硬質被覆層の形成が高温
反応ガスの蒸着により行われるものであるため、超硬基
体表面上に蒸着された硬質被覆層には構成層ごとに形成
条件によって引張応力や圧縮応力が残留するようにな
り、この結果前記硬質被覆層には大きな残留応力が存在
するようになるが、この硬質被覆層に存在する大きな残
留応力が、特に各種鋼のフライス加工を高速重切削条件
で行った場合に切刃部に欠けやチッピングなどの欠損を
発生させる原因となること。 （ｂ）上記従来ミーリング工具を構成する切刃チップに
おいて、図１に要部概略縦断面図で示される通り、切刃
部におけるすくい面と逃げ面の交わる切刃稜線部を挟ん
だすくい面側と逃げ面側のそれぞれに、前記切刃稜線部
に沿って、前記すくい面、逃げ面、および切刃稜線部に
おける上記硬質被覆層の厚さに比して相対的に厚さの薄
い薄層帯域を５〜５０μｍの幅で形成すると、この切刃
稜線部を挟んで形成した２本の薄層帯域によって前記硬
質被覆層に存在する残留応力が著しく低減されるように
なり、したがってこの結果のミーリング工具は、鋼のフ
ライス加工を行っても、通常の条件での切削は勿論のこ
と、苛酷な切削条件となる高速重切削条件で行った場合
にも切刃チップの切刃部に欠けやチッピングなどの欠損
の発生なく、すぐれた耐摩耗性を長期に亘って発揮する
ようになること。以上（ａ）および（ｂ）に示される研
究結果を得たのである。Means for Solving the Problems Accordingly, the present inventors have
From the above-mentioned viewpoints, in order to develop a milling tool having excellent fracture resistance, the present inventors have paid particular attention to the cutting edge chip that forms the cutting tool, and as a result of research, have been found that (a) the cutting tool that forms the above-mentioned conventional milling tool In the blade tip, the formation of the hard coating layer on the surface of the super-hard substrate is performed by vapor deposition of a high-temperature reaction gas. As a result, a tensile stress and a compressive stress remain, and as a result, a large residual stress is present in the hard coating layer. The large residual stress existing in the hard coating layer is particularly large when milling various steels. When cutting is performed under high-speed heavy cutting conditions, it may cause chipping or chipping of the cutting edge. (B) In the cutting edge tip constituting the above-mentioned conventional milling tool, as shown in a schematic vertical sectional view of a main part in FIG. 1, a rake face side sandwiching a cutting edge ridge line portion where a rake face and a flank intersect in the cutting edge portion. And on each of the flank sides, along the cutting edge ridge, the rake face, the flank, and a thin layer relatively thinner than the thickness of the hard coating layer at the cutting edge ridge. When the band is formed with a width of 5 to 50 μm, the residual stress existing in the hard coating layer is remarkably reduced by the two thin layers formed on both sides of the cutting edge ridge. Even when milling steel, the milling tool is not only cut under normal conditions, but also when cutting under high-speed heavy cutting conditions that are severe cutting conditions, chipping of the cutting edge of the cutting edge chip Immediately without chipping or other defects To become to exert a long term wear resistance was. The research results shown in (a) and (b) above were obtained.
【０００５】この発明は、上記の研究結果に基づいてな
されたものであって、鋼製回転工具本体の先端部外周面
に形成された切り欠き部に、切刃チップを着脱自在に装
着した形式のミーリング工具において、前記切刃チップ
を、超硬基体の表面に、ＴｉＣ層、ＴｉＮ層、ＴｉＣＮ
層、ＴｉＣＯ層、ＴｉＮＯ層、およびＴｉＣＮＯ層から
なるＴｉ化合物層のうちの１種または２種以上と、Ａｌ
2 Ｏ3 層とで構成された硬質被覆層を２〜６μｍの平均
層厚で化学蒸着および／または物理蒸着してなり、か
つ、上記硬質被覆層のすくい面と逃げ面の交わる切刃稜
線部を挟んだすくい面側と逃げ面側のそれぞれに、前記
切刃稜線部に沿って、前記すくい面、逃げ面、および切
刃稜線部における上記硬質被覆層の厚さに比して相対的
に厚さの薄い薄層帯域を５〜５０μｍの幅で形成してな
る、切刃チップで構成することにより、耐欠損性の著し
い向上を図ったミーリング工具に特徴を有するものであ
る。The present invention has been made on the basis of the above research results, and has a cutting tool tip detachably mounted in a notch formed on the outer peripheral surface of the tip of a steel rotary tool body. In the milling tool of the above, the cutting edge tip is provided on a surface of a cemented carbide substrate by a TiC layer, a TiN layer, a TiCN layer.
Layer, a TiCO layer, a TiNO layer, and one or more of Ti compound layers including a TiCNO layer;
A hard coating layer composed of a 2 O 3 layer and a chemical coating and / or physical vapor deposition having an average layer thickness of 2 to 6 μm, and a cutting edge ridge portion where a rake face and a flank of the hard coating layer intersect. On each of the rake face side and the flank face sandwiching the, along the cutting edge ridge, the rake face, flank, and relative to the thickness of the hard coating layer at the cutting edge ridge. The feature of the present invention is that the milling tool is provided with a cutting edge tip in which a thin layer zone having a small thickness is formed with a width of 5 to 50 μm, thereby significantly improving fracture resistance.
【０００６】つぎに、この発明のミーリング工具におい
て、これを構成する切刃チップの硬質被覆層における薄
層帯域の幅は経験的に定めたものであって、その幅が５
μｍでは硬質被覆層のもつ残留応力の低減効果が不十分
であり、苛酷な切削条件である高速重切削条件では切刃
部に欠けやチッピングが発生するのを避けることができ
ず、一方その幅が５０μｍを越えると、耐摩耗性が急激
に低下するようになるという理由で、その幅を５〜５０
μｍとしたのである。[0006] Next, in the milling tool of the present invention, the width of the thin layer zone in the hard coating layer of the cutting edge tip constituting the milling tool is empirically determined, and the width is 5 mm.
In the case of μm, the effect of reducing the residual stress of the hard coating layer is insufficient, and chipping and chipping of the cutting edge cannot be avoided under high-speed heavy cutting conditions, which are severe cutting conditions, while the width of Is more than 50 μm, the abrasion resistance is rapidly reduced, so that the width is 5 to 50 μm.
μm.
【０００７】（ｇ）硬質被覆層の全体平均層厚 その層厚が２μｍでは所望のすぐれた耐摩耗性を長期に
亘って確保することができず、一方その層厚が６μｍを
越えると、切刃部に欠けやチッピングが発生し易くなる
ことから、その全体平均層厚を２〜６μｍと定めた。(G) Overall Average Thickness of Hard Coating Layer If the thickness of the hard coating layer is 2 μm, the desired excellent wear resistance cannot be ensured for a long period of time. Since chipping and chipping easily occur in the blade portion, the overall average layer thickness is set to 2 to 6 μm.
【０００８】[0008]
【発明の実施の形態】つぎに、この発明のミーリング工
具を実施例により具体的に説明する。原料粉末として、
平均粒径：１．５μｍを有する細粒ＷＣ粉末、同３μｍ
の中粒ＷＣ粉末、同１．２μｍの（Ｔｉ，Ｗ）ＣＮ（重
量比で、以下同じ、ＴｉＣ／ＴｉＮ／ＷＣ＝２４／２０
／５６）粉末、同１．２μｍのＺｒＣ粉末、同１．３μ
ｍの（Ｔａ，Ｎｂ）Ｃ（ＴａＣ／ＮｂＣ＝９０／１０）
粉末、同１μｍのＣｒ粉末、および同１．２μｍのＣｏ
粉末を用意し、これら原料粉末を表１に示される配合組
成に配合し、ボールミルで７２時間湿式混合し、乾燥し
た後、所定の形状の圧粉体にプレス成形し、この圧粉体
を同じく表１に示される条件で真空焼結することにより
ＳＯＭＴ１２０４ＰＤＥＲ−Ｈ２に即した形状の超硬基
体Ａ〜Ｅをそれぞれ製造した。なお、表１には、上記超
硬基体Ａ〜Ｅの内部硬さ（ロックウエル硬さＡスケー
ル）をそれぞれ示した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a milling tool according to the present invention will be specifically described with reference to embodiments. As raw material powder,
Average particle size: fine WC powder having 1.5 μm, same as 3 μm
Medium WC powder, 1.2 μm (Ti, W) CN (weight ratio, same hereafter, TiC / TiN / WC = 24/20)
/ 56) powder, 1.2 μm ZrC powder, 1.3 μm
m (Ta, Nb) C (TaC / NbC = 90/10)
Powder, 1 μm Cr powder, and 1.2 μm Co powder
Powders are prepared, and these raw material powders are blended in the composition shown in Table 1, wet-mixed in a ball mill for 72 hours, dried, and then pressed into a green compact of a predetermined shape. Carbide substrates A to E having shapes conforming to SOMT1204PDER-H2 were manufactured by vacuum sintering under the conditions shown in Table 1. Table 1 shows the internal hardness (Rockwell hardness A scale) of each of the carbide substrates A to E.
【０００９】ついで、これらの超硬基体Ａ〜Ｅの表面
に、ホーニング加工を施した状態で、通常の化学蒸着装
置を用い、表２（表中の※印ＴｉＣＮは特開平６−８０
１０号公報に記載される縦長成長結晶組織をもつもので
ある）に示される条件にて、表３に示される層構成およ
び平均層厚の硬質被覆層を、それぞれの膜厚を均等に形
成することにより比較切刃チップア〜コをそれぞれ製造
した。Then, the surface of each of these superhard substrates A to E was subjected to honing processing, and a normal chemical vapor deposition apparatus was used.
Under the conditions shown in Japanese Patent Application Laid-Open No. 10-104, the hard coating layer having the layer configuration and the average layer thickness shown in Table 3 is uniformly formed. In this way, comparative cutting edge tips A to K were respectively manufactured.
【００１０】さらに、この結果得られた比較切刃チップ
ア〜コのそれぞれの切刃稜線部にそって、砥石を用い
て、硬質被覆層の切刃稜線部を挟んだすくい面側と逃げ
面側のそれぞれに、表４に示される幅の薄層帯域を形成
することにより本発明切刃チップａ〜ｊをそれぞれ製造
した。Further, along the respective cutting edge ridges of the comparative cutting edge tips A to K obtained as described above, the rake face and the flank face sandwiching the cutting edge ridge of the hard coating layer using a grindstone. The cutting edge tips a to j of the present invention were produced by forming a thin layer zone having the width shown in Table 4 in each of the above.
【００１１】つぎに、上記本発明切刃チップａ〜ｊおよ
び比較切刃チップア〜コのそれぞれを、ＪＩＳ・ＳＣＭ
４４０（硬さ：ＨR Ｃ４０）の鋼からなり、直径：４０
ｍｍ×長さ：１２５ｍｍの寸法および図３に示される形
状をもった回転工具本体の先端部外周面にそって形成さ
れた３個の切り欠き部の全てに、表５に示される組み合
わせでネジ止めすることにより本発明ミーリング工具１
〜１０および比較ミーリング工具１〜１０をそれぞれ製
造した。Next, each of the cutting edge tips a to j of the present invention and the comparative cutting edge tips a to k is JIS SCM
440 (hardness: H R C40) consists of steel, diameter: 40
mm × length: all three notches formed along the outer peripheral surface of the tip of the rotary tool body having the dimensions of 125 mm and the shape shown in FIG. By stopping the milling tool 1 of the present invention
And comparative milling tools 1 to 10 were manufactured, respectively.
【００１２】ついで、この結果得られた本発明ミーリン
グ工具１〜１０および比較ミーリング工具１〜１０につ
いて、 被削材：Ｓ４５Ｃの角材、 切削速度：３００ｍ／ｍｉｎ、 １刃当りの送り：０．１５ｍｍ／刃、 軸方向の切り込み：１０ｍｍ、 径方向の切り込み：１０ｍｍ、 切削時間：１０分、 の条件での鋼の乾式高速高切込みフライス加工、並び
に、 被削材：ＳＣＭ４４０の角材、 切削速度：２７０ｍ／ｍｉｎ、 １刃当りの送り：０．３ ｍｍ／刃、 軸方向の切り込み：２．５ｍｍ、 径方向の切り込み：５ｍｍ、 切削時間：１０分、 の条件での鋼の乾式高速高送りフライス加工を行い、ミ
ーリング工具を構成する切刃チップにおける切刃部の逃
げ面摩耗幅を測定した。これらの測定結果を表４に示し
た。Then, the resulting milling tools 1 to 10 of the present invention and the comparative milling tools 1 to 10 were obtained. Work material: square material of S45C, cutting speed: 300 m / min, feed per tooth: 0.15 mm / Cutting edge, axial depth of cut: 10 mm, radial depth of cut: 10 mm, cutting time: 10 minutes, dry high-speed high depth milling of steel, and work material: square material of SCM440, cutting speed: 270 m / Min, feed per tooth: 0.3 mm / tooth, axial depth of cut: 2.5 mm, radial depth of cut: 5 mm, cutting time: 10 minutes, dry high speed high feed milling of steel under the following conditions: Was performed, and the flank wear width of the cutting edge portion of the cutting edge tip constituting the milling tool was measured. Table 4 shows the results of these measurements.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 [Table 3]
【００１６】[0016]
【表４】 [Table 4]
【００１７】[0017]
【表５】 [Table 5]
【００１８】[0018]
【発明の効果】表５に示される結果から、切刃チップに
おける切刃稜線部を挟んだすくい面側と逃げ面側のそれ
ぞれの硬質被覆層に、薄層帯域を形成して前記硬質被覆
層に存在する残留応力の除去を図った本発明ミーリング
工具１〜１０は、いずれもこれを構成する切刃チップの
切刃部に欠けやチッピングなどの欠損の発生なく、すぐ
れた切削性能を発揮するのに対して、切刃チップにおけ
る硬質被覆層の層厚がすくい面、逃げ面、および切刃稜
線部に亘って同じである比較ミーリング工具１〜１０に
おいては、いずれも硬質被覆層に存在する大きな残留応
力が原因で切刃チップの切刃部に欠けやチッピングが発
生し、これが原因で比較的短時間で使用寿命に至ること
が明らかである。上述のように、この発明のミーリング
工具は、例えば一般の鋼や鋳鉄などの通常の条件での切
削は勿論のこと、特に鋼のフライス加工をきわめて苛酷
な切削条件である高速重切削条件で行っても、これを構
成する切刃チップはすぐれた耐欠損性を示し、すぐれた
切削性能を長期に亘って発揮するものである。According to the results shown in Table 5, the hard coating layer is formed by forming a thin layer zone on each of the hard coating layers on the rake face and the flank face sandwiching the cutting edge ridge portion in the cutting edge tip. Each of the milling tools 1 to 10 of the present invention, which aims to remove the residual stress existing in the cutting edge, exhibits excellent cutting performance without occurrence of chipping or chipping in the cutting edge portion of the cutting edge tip constituting the same. On the other hand, in the comparative milling tools 1 to 10 in which the layer thickness of the hard coating layer in the cutting edge tip is the same across the rake face, flank face, and cutting edge ridge portion, all exist in the hard coating layer. It is clear that chipping and chipping occur at the cutting edge portion of the cutting edge tip due to the large residual stress, which leads to a relatively short service life. As described above, the milling tool of the present invention performs not only cutting under ordinary conditions, for example, general steel or cast iron, but particularly milling steel under high-speed heavy cutting conditions, which are extremely severe cutting conditions. However, the cutting edge tip that constitutes it exhibits excellent chipping resistance and exhibits excellent cutting performance over a long period of time.
【図１】この発明のミーリング工具の切刃チップの切刃
部の要部概略縦断面図である。FIG. 1 is a schematic longitudinal sectional view of a main part of a cutting edge portion of a cutting edge tip of a milling tool of the present invention.
【図２】従来ミーリング工具の切刃チップの切刃部の要
部概略縦断面図である。FIG. 2 is a schematic longitudinal sectional view of a main part of a cutting edge portion of a cutting edge tip of a conventional milling tool.
【図３】ミーリング工具の底面図および正面図（ａ）お
よびこれを構成する切刃チップの縦断面図および平面図
（ｂ）である。FIG. 3 is a bottom view and a front view (a) of a milling tool, and a longitudinal sectional view and a plan view (b) of a cutting blade tip constituting the milling tool.
Claims (1)
された切り欠き部に、表面被覆超硬合金製切刃チップを
着脱自在に装着した形式のミーリング工具において、前
記表面被覆超硬合金製切刃チップを、 炭化タングステン基超硬合金基体の表面に、Ｔｉの炭化
物層、窒化物層、炭窒化物層、炭酸化物層、窒酸化物
層、および炭窒酸化物層からなるＴｉ化合物層のうちの
１種または２種以上と、酸化アルミニウム層とで構成さ
れた硬質被覆層を２〜６μｍの平均層厚で化学蒸着およ
び／または物理蒸着してなり、 かつ、前記硬質被覆層のすくい面と逃げ面の交わる切刃
稜線部を挟んだすくい面側と逃げ面側のそれぞれに、前
記切刃稜線部に沿って、前記すくい面、逃げ面、および
切刃稜線部における上記硬質被覆層の厚さに比して相対
的に厚さの薄い薄層帯域を５〜５０μｍの幅で形成した
表面被覆超硬合金製切刃チップ、で構成したことを特徴
とする耐欠損性のすぐれたミーリング工具。1. A milling tool of a type in which a surface-coated cemented carbide cutting edge tip is removably mounted in a notch formed in an outer peripheral surface of a tip portion of a steel rotary tool main body. An alloy cutting edge tip is formed on a surface of a tungsten carbide-based cemented carbide substrate by forming a titanium carbide layer, a nitride layer, a carbonitride layer, a carbonate layer, a nitride layer, and a carbonitride layer. A hard coating layer composed of one or more of the compound layers and an aluminum oxide layer formed by chemical vapor deposition and / or physical vapor deposition with an average layer thickness of 2 to 6 μm; The rake face, the flank, and the rigidity at the cutting edge ridge portion, along the cutting edge ridge portion, on each of the rake face side and the flank side sandwiching the cutting edge ridge portion where the rake face and the flank face intersect. Relatively thick compared to the thickness of the coating layer Thin Thin layer band formation in 5~50μm wide surface-coated cemented carbide cutting inserts in fracture resistance superior milling tool, characterized in that the arrangement, of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15931898A JP3391264B2 (en) | 1998-06-08 | 1998-06-08 | Milling tool with excellent fracture resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15931898A JP3391264B2 (en) | 1998-06-08 | 1998-06-08 | Milling tool with excellent fracture resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11347804A true JPH11347804A (en) | 1999-12-21 |
| JP3391264B2 JP3391264B2 (en) | 2003-03-31 |
Family
ID=15691185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15931898A Expired - Fee Related JP3391264B2 (en) | 1998-06-08 | 1998-06-08 | Milling tool with excellent fracture resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3391264B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014104545A (en) * | 2012-11-28 | 2014-06-09 | Kyocera Corp | Coated tool |
| CN107252917A (en) * | 2017-07-12 | 2017-10-17 | 北京沃尔德金刚石工具股份有限公司 | A kind of indexable face milling insert and the facing cut cutter head using the blade |
-
1998
- 1998-06-08 JP JP15931898A patent/JP3391264B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014104545A (en) * | 2012-11-28 | 2014-06-09 | Kyocera Corp | Coated tool |
| CN107252917A (en) * | 2017-07-12 | 2017-10-17 | 北京沃尔德金刚石工具股份有限公司 | A kind of indexable face milling insert and the facing cut cutter head using the blade |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3391264B2 (en) | 2003-03-31 |
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