JP2001030108A - Front milling tool displaying excellent defect resistance of throwaway tip in high feeding and speed cutting - Google Patents
Front milling tool displaying excellent defect resistance of throwaway tip in high feeding and speed cuttingInfo
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- JP2001030108A JP2001030108A JP11204083A JP20408399A JP2001030108A JP 2001030108 A JP2001030108 A JP 2001030108A JP 11204083 A JP11204083 A JP 11204083A JP 20408399 A JP20408399 A JP 20408399A JP 2001030108 A JP2001030108 A JP 2001030108A
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- angle
- tip
- milling tool
- phase
- throw
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、きわめて過酷な
切削条件である高送り高速切削で、スローアウエイチッ
プの切刃部に欠けやチッピング（微小欠け）などの欠損
の発生なく、長期に亘ってすぐれた切削性能を発揮する
正面フライス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 high-feed, high-speed cutting under extremely severe cutting conditions, and does not cause chipping or chipping (small chipping) of the cutting edge of the throw-away tip over a long period of time. The present invention relates to a face milling tool exhibiting excellent cutting performance.
【０００２】[0002]
【従来の技術】従来、一般に、図1（ａ）に斜視図で、
図２（ａ）に半部切欠き正面図で、また図２（ｂ）に半
部縦断面拡大図で例示される通り、リング状工具本体の
正面に所定間隔をもって複数個のスローアウエイチップ
(以下、単にチップと云う)を着脱自在に取り付けてなる
構造の正面フライス工具が知られている。また、上記チ
ップが、図１（ｂ）に斜視図で、図１（ｃ）に縦断面図
で例示される形状を有し、さらに断面の顕微鏡組織観察
で、硬質相が７５〜９５面積％を占め、残りが結合相と
不可避不純物からなる組織を示し、上記硬質相は、芯部
および周辺部が実質的にＴｉとｍの複合炭窒化物（ただ
し、ｍは元素周期律表の４ａ，５ａ，および６ａ族金属
のうちの１種または２種以上を示す）からなる有芯構造
を有し、上記結合相は、結合相に占める重量割合で、Ｎ
ｉ：１０〜３５％、Ｃｏ：４５〜７０％、を含有するＣ
ｏ−Ｎｉ系合金（ただし、Ｎｉ＋Ｃｏ＝９０％以上）か
らなる炭窒化チタン系サーメットで構成されることも知
られている。さらに、上記のスローアウエイチップが、
切刃稜線部におけるすくい面と逃げ面の交わる角度（以
下、稜線角という）を７５〜８５度とした形状を有し、
上記リング状工具本体に５〜１５度のアキシャルレーキ
角（前記工具本体の軸線に対する傾き角）で取り付けら
れることも良く知られるところである。また、さらに上
記の正面フライス工具を構成するチップが、通常、硬質
相芯部形成用原料粉末としてＴｉとｍの複合炭窒化物粉
末（ただし、ｍは元素周期律表の４ａ，５ａ，および６
ａ族金属のうちの１種または２種以上を示す）、硬質相
周辺部形成用原料粉末として前記ｍの炭化物粉末および
窒化物粉末のうちの１種または２種以上を用い、また結
合相形成用原料粉末としてＣｏ粉末およびＮｉ粉末を用
い、これら原料粉末を所定の配合組成に配合し、湿式混
合し、乾燥した後、圧粉体にプレス成形し、この圧粉体
を、減圧窒素雰囲気中、１４２０〜１６００℃の温度に
所定時間保持後、炉冷の条件で燒結することにより製造
されることも知られている。2. Description of the Related Art Conventionally, in general, FIG.
As shown in FIG. 2 (a) in a front view with a half cutaway, and in FIG. 2 (b) in an enlarged longitudinal half section view, a plurality of throw-away tips are provided at a predetermined interval in front of the ring-shaped tool body.
2. Description of the Related Art A face milling tool having a structure in which a chip (hereinafter simply referred to as a chip) is detachably attached is known. The chip has a shape illustrated in a perspective view in FIG. 1B and a vertical cross-sectional view in FIG. 1C. Further, when the microstructure of the cross section is observed, the hard phase is 75 to 95 area%. And the remainder comprises a structure consisting of a binder phase and unavoidable impurities. The hard phase has a core portion and a peripheral portion substantially composed of a composite carbonitride of Ti and m (where m is 4a, 4a, 5a and 6a). The binder phase has a cored structure composed of N
C containing i: 10 to 35% and Co: 45 to 70%
It is also known to be constituted by a titanium carbonitride-based cermet made of an o-Ni-based alloy (Ni + Co = 90% or more). In addition, the above throwaway chip,
It has a shape in which the angle at which the rake face and the flank intersect at the cutting edge ridge (hereinafter, referred to as ridge angle) is 75 to 85 degrees,
It is also well known that the ring-shaped tool body is attached at an axial rake angle of 5 to 15 degrees (a tilt angle with respect to the axis of the tool body). Further, the chip constituting the face milling tool is usually made of a composite carbonitride powder of Ti and m (where m is 4a, 5a and 6 in the periodic table of elements) as a raw material powder for forming a hard phase core.
one or more of group a metals), and one or more of the above-mentioned carbide powder and nitride powder m as the raw material powder for forming the peripheral portion of the hard phase; Using Co powder and Ni powder as raw material powders, these raw material powders are blended in a predetermined composition, wet-mixed, dried, and then pressed into a green compact. It is also known that it is manufactured by holding at a temperature of 1420 to 1600 ° C. for a predetermined time and then sintering under furnace cooling conditions.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の切削加工
の省力化および省エネ化、さらに低コスト化に対する要
求は強く、これらの要求に対応するためにはフライス切
削条件のうちの送りを大きくし、かつ切削速度を速くす
る必要があり、このためには正面フライス工具のリング
状工具本体に取り付けられるチップの稜線角を、上記の
従来チップの稜線角である７５〜８５度に比して小さい
６５〜７５度に鋭角化すると共に、前記リング状工具本
体へのチップの取り付けを、切削面に対する傾き角を小
さくした状態、すなわちチップのリング状工具本体の軸
線に対する傾き角であるアキシャルレーキ角を従来チッ
プのアキシャルレーキ角である５〜１５度に比して相対
的に大きい１５〜３０度にした状態で行なわなければな
らないが、上記の従来正面フライス工具において、これ
を構成するチップの稜線角を６５〜７５度に鋭角化し、
かつチップのリング状工具本体への取り付け角であるア
キシャルレーキ角を１５〜３０度とした状態で、高送り
高速切削を行うと、チップの切刃部に欠けやチッピング
が発生し、これが原因でチップは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, there has been a strong demand for labor saving, energy saving, and further cost reduction of cutting work, and in order to meet these demands, the feed of milling cutting conditions has to be increased. In addition, it is necessary to increase the cutting speed. For this purpose, the ridge angle of the tip attached to the ring-shaped tool body of the face milling tool is smaller than the ridge angle of the conventional tip described above of 75 to 85 degrees. Along with making the angle 65-75 degrees, and mounting the chip to the ring-shaped tool body, the angle of inclination with respect to the cutting surface is reduced, that is, the axial rake angle which is the angle of inclination of the chip with respect to the axis of the ring-shaped tool body. This must be performed in a state where the angle is 15 to 30 degrees which is relatively large as compared with the axial rake angle of the conventional chip of 5 to 15 degrees. In come face milling tool, and an acute angle of 65-75 degrees ridge angle a chip forming this,
When high feed and high speed cutting is performed with the axial rake angle, which is the angle of attachment of the insert to the ring-shaped tool body, set to 15 to 30 degrees, chipping or chipping occurs at the cutting edge of the insert. At present, the chip reaches a service life 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、正面フライス工具のチップに着
目し、高送り高速切削を行ってもチップがすぐれた耐欠
損性を示す正面フライス工具を開発すべく、研究を行っ
た結果、正面フライス工具のチップを、上記の従来正面
フライス工具のチップと同様に炭窒化チタン系サーメッ
トで構成するが、炭窒化チタン系サーメットにおける硬
質相を、芯部および周辺部が実質的にＴｉとＭの複合炭
窒化物（ただし、ＭはＴａ，Ｎｂ，Ｖ，Ｗ，およびＺｒ
のうちの１種または２種以上を示す）からなる有芯構造
を有するものに特定し、かつ上記結合相を、結合相に占
める重量割合で、Ｗ：１５〜３５％、Ｎｉ：１０〜５０
％、Ｃｏ：２０〜７０％、を含有するＣｏ−Ｎｉ−Ｗ系
合金（ただし、Ｗ＋Ｎｉ＋Ｃｏ＝９０％以上）で構成す
ると、この結果の炭窒化チタン系サーメットからなるチ
ップにおいては、これの稜線角を６５〜７５度に鋭角化
した状態で、正面フライス工具のリング状工具本体に１
５〜３０度のアキシャルレーキ角、すなわち切削面に対
する傾き角を相対的に小さくしで取り付けて、高送り高
速切削を行っても前記チップの切刃部に欠けやチッピン
グが発生することがなくなり、長期に亘ってすぐれた切
削性能を発揮するようになるという研究結果を得たので
ある。Means for Solving the Problems Accordingly, the present inventors have
In view of the above, we focused on the face milling tool inserts, and conducted research to develop a face milling tool that shows excellent chipping resistance even when performing high feed high speed cutting. Is composed of a titanium carbonitride-based cermet in the same manner as the above-mentioned conventional face milling tool tip, but the hard phase in the titanium carbonitride-based cermet is substantially the same as the composite Nitride (where M is Ta, Nb, V, W, and Zr
One or two or more of the above)), and the binder phase has a weight percentage of W: 15 to 35%, Ni: 10 to 50 in the binder phase.
%, And Co: 20 to 70%, a chip made of a titanium-carbonitride-based cermet obtained by using a Co-Ni-W-based alloy (W + Ni + Co = 90% or more) has a ridge angle of the cermet. Is sharpened to 65 to 75 degrees, and 1 is attached to the ring-shaped tool body of the face milling tool.
Axial rake angle of 5 to 30 degrees, that is, the inclination angle with respect to the cutting surface is relatively small, and chipping or chipping does not occur in the cutting edge portion of the chip even when performing high feed high speed cutting, The research results show that they will exhibit excellent cutting performance over a long period of time.
【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、リング状工具本体の正面に複数個
のチップを着脱自在に取り付けてなる正面フライス工具
において、（ａ）上記チップを、断面の顕微鏡組織観察
で、硬質相が７５〜９５面積％を占め、残りが結合相と
不可避不純物からなる組織を示し、上記硬質相が、芯部
および周辺部が実質的にＴｉとＭの複合炭窒化物（ただ
し、ＭはＴａ，Ｎｂ，Ｖ，Ｗ，およびＺｒのうちの１種
または２種以上を示す）からなる有芯構造を有し、かつ
上記結合相が、結合相に占める重量割合で、Ｗ：１５〜
３５％、Ｎｉ：１０〜５０％、Ｃｏ：２０〜７０％、を
含有するＣｏ−Ｎｉ−Ｗ系合金（ただし、Ｗ＋Ｎｉ＋Ｃ
ｏ＝９０％以上）からなる炭窒化チタン系サーメットで
構成すると共に、（ｂ）このチップの切刃稜線部におけ
るすくい面と逃げ面の交わる角度を６５〜７５度とし、
（ｃ）さらに、このチップを上記リング状工具本体に１
５〜３０度のアキシャルレーキ角（前記工具本体の軸線
に対する傾き角）で取り付けてなる、高送り高速切削で
チップがすぐれた耐欠損性を発揮する正面フライス工具
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 is directed to a face milling tool in which a plurality of chips are detachably attached to the front of a ring-shaped tool body. In the microscopic observation of the cross section, the hard phase occupies 75 to 95 area%, and the rest shows a structure consisting of a binder phase and unavoidable impurities. It has a cored structure composed of a composite carbonitride (where M represents one or more of Ta, Nb, V, W, and Zr), and the binder phase occupies the binder phase By weight, W: 15
Co-Ni-W alloy containing 35%, Ni: 10 to 50%, and Co: 20 to 70% (however, W + Ni + C
o = 90% or more), and (b) the angle at which the rake face and the flank intersect at the cutting edge ridge of the tip is 65 to 75 degrees,
(C) Further, insert this tip into the above-mentioned ring-shaped tool body.
The present invention is characterized by a face milling tool which is mounted at an axial rake angle of 5 to 30 degrees (the angle of inclination with respect to the axis of the tool main body) and exhibits excellent chipping resistance in high feed and high speed cutting.
【０００６】なお、この発明の正面フライス工具のチッ
プを構成する炭窒化チタン系サーメットの組成は以下に
示す理由により定めたものである。 （ａ）硬質相の割合 その割合が７５面積％未満では、相対的に結合相の割合
が多くなりすぎて、所望の耐摩耗性を確保することがで
きず、一方その割合が95面積％を超えると、焼結性が低
下し、所望の強度を確保することができなくなることか
ら、その割合を７５〜９５％と定めた。The composition of the titanium carbonitride cermet constituting the tip of the face milling tool of the present invention is determined for the following reasons. (A) Proportion of hard phase If the proportion is less than 75 area%, the proportion of the binder phase becomes relatively too large, so that the desired wear resistance cannot be secured. If it exceeds, the sinterability deteriorates and the desired strength cannot be secured, so the ratio is set to 75 to 95%.
【０００７】（ｂ）結合相の組成 Ｗ成分には、結合相の耐熱性および耐熱塑性変形性、さ
らに高温強度を著しく向上させ、もってチップの稜線角
を相対的に鋭角化すると共に、チップの工具本体への取
り付け角を切削面に対して小さくした状態で高送り高速
切削を行っても、切刃部に欠けやチッピングが発生する
のを防止する作用があるが、その割合が１５重量％未満
では、前記作用に所望の効果が得られず、一方その割合
が３５重量％を超えると、結合相の靭性が低下し、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
割合を１５〜３５重量％と定めた。また、Ｎｉ成分に
は、硬質相との濡れ性を向上させ、もって耐チッピング
性を向上させる作用があるが、その割合が１０重量％未
満では、所望の耐チッピング性向上効果が得られず、一
方その割合が５０重量％を超えると、結合相の耐熱性お
よび高温強度が低下し、これが摩耗促進の原因となるこ
とから、その割合を１０〜５０重量％と定めた。さら
に、Co成分には、焼結性を向上させ、もってチップの強
度を向上させる作用があるが、その割合が２０重量％未
満では、所望の強度を確保することができず、一方その
割合が７０重量％を超えると、耐熱塑性変形性に低下傾
向が現れ、切刃部に欠けやチッピングが発生し易くなる
ことから、その割合を２０〜７０重量％と定めた。な
お、この場合Ｗ＋Ｎｉ＋Ｃｏが９０重量％未満になると
結合相の高温強度が急激に低下し、この結果切刃部に欠
けやチッピングが発生し易くなることから、Ｗ＋Ｎｉ＋
Ｃｏの割合を９０重量％以上にしなければならない。(B) Composition of the binder phase The W component significantly improves the heat resistance and the heat-resistant plastic deformation property of the binder phase and the high-temperature strength, thereby making the ridge angle of the chip relatively sharp, and at the same time, Even if high-feed high-speed cutting is performed with the angle of attachment to the tool body reduced relative to the cutting surface, it has the effect of preventing chipping and chipping from occurring at the cutting edge, but the proportion is 15% by weight. If the ratio is less than 35%, the desired effect cannot be obtained. On the other hand, if the ratio exceeds 35% by weight, the toughness of the binder phase is reduced, and chipping or chipping is likely to occur in the cutting edge portion. Was determined to be 15 to 35% by weight. Further, the Ni component has an effect of improving the wettability with the hard phase and thereby improving the chipping resistance. However, if the proportion is less than 10% by weight, the desired effect of improving the chipping resistance cannot be obtained. On the other hand, if the proportion exceeds 50% by weight, the heat resistance and high-temperature strength of the binder phase decrease, which causes the acceleration of abrasion. Therefore, the proportion is set to 10 to 50% by weight. Furthermore, the Co component has the effect of improving the sinterability and hence the strength of the chip, but if the proportion is less than 20% by weight, the desired strength cannot be ensured, while the proportion is reduced. If it exceeds 70% by weight, the heat-resistant plastic deformation tends to decrease, and chipping or chipping tends to occur in the cutting edge portion. Therefore, the ratio is set to 20 to 70% by weight. In this case, when the content of W + Ni + Co is less than 90% by weight, the high-temperature strength of the binder phase rapidly decreases, and as a result, chipping and chipping easily occur in the cutting edge portion.
The proportion of Co must be at least 90% by weight.
【０００８】また、この発明の正面フライス工具におい
て、チップの稜線角および工具本体への取り付け角であ
るアキシャルレーキ角は、上記の通りフライス切削を高
送り高速切削条件で行うのに際して必然的に定まるもの
であり、したがって、チップの稜線角が７５度を越えた
り、アキシャルレーキ角が１５度未満であったりする
と、従来チップの稜線角およびアキシャルレーキ角とな
って高送り高速切削が不可能となり、一方チップの稜線
角をさらに小さくして６５度未満にしたり、アキシャル
レーキ角をさらに大きくして３０度を越えたものにする
と、高送り高速切削ではチップの切刃部に欠損が発生し
易くなるのである。Further, in the face milling tool of the present invention, the ridge angle of the insert and the axial rake angle which is the mounting angle to the tool main body are inevitably determined when milling is performed under high feed and high speed cutting conditions as described above. Therefore, when the ridge angle of the tip exceeds 75 degrees or the axial rake angle is less than 15 degrees, the ridge angle and the axial rake angle of the conventional chip become high feed high-speed cutting, On the other hand, if the ridge angle of the tip is further reduced to less than 65 degrees, or if the axial rake angle is further increased to exceed 30 degrees, chipping is likely to occur in the cutting edge portion of the chip in high-feed high-speed cutting. It is.
【０００９】[0009]
【発明の実施の形態】つぎに、この発明の正面フライス
工具を実施例により具体的に説明する。まず、硬質相芯
部形成用原料粉末として、いずれも１〜２μmの範囲内
の所定の平均粒径を有し、かついずれも原子比で、（Ｔ
ｉ0.9Ｔａ0.1）Ｃ0.7Ｎ0.3の組成もったＴｉとＴａの複
合炭窒化物粉末、（Ｔｉ0.9Ｎｂ0.1）Ｃ0.7Ｎ0.3の組成
もったＴｉとＮｂの複合炭窒化物粉末、（Ｔｉ0.8Ｔａ
0.1Ｚｒ0.1）Ｃ0.5Ｎ0.5の組成もったＴｉとＴａとＺｒ
の複合炭窒化物粉末、（Ｔｉ0.7Ｗ0.3）Ｃ0.5Ｎ0 .5の組
成もったＴｉとＷの複合炭窒化物粉末、Ｔｉ0.7Ｗ0.2Ｎ
ｂ0.1）Ｃ0.4Ｎ0. 6の組成もったＴｉとＷとＮｂの複合
炭窒化物粉末、（Ｔｉ0.9Ｖ0.1）Ｃ0.6Ｎ0. 4の組成もっ
たＴｉとＶの複合炭窒化物粉末、（Ｔｉ0.8Ｖ0.1Ｚｒ
0.1）Ｃ0.7Ｎ0 .3の組成もったＴｉとＶとＺｒの複合炭
窒化物粉末、（Ｔｉ0.7Ｚｒ0.3）Ｃ0.5Ｎ0.5の組成もっ
たＴｉとＺｒの複合炭窒化物粉末、（Ｔｉ0.8Ｔａ0.1Ｎ
ｂ0.1）Ｃ0.7Ｎ0.3の組成もったＴｉとＴａとＮｂの複
合炭窒化物粉末、および（Ｔｉ0. 7Ｔａ0.1Ｖ0.1Ｗ0.1）
Ｃ0.6Ｎ0.4の組成もったＴｉとＴａとＶとＷの複合炭窒
化物粉末を用意し、また、硬質相周辺部形成用原料粉末
として、同じくいずれも１〜２μmの範囲内の所定の平
均粒径を有する、ＴｉＮ粉末、ＺｒＣ粉末、ＴａＣ粉
末、ＮｂＣ粉末、およびＷC粉末を用意し、さらに結合
相形成用原料粉末として、同じくいずれも１〜２μmの
範囲内の所定の平均粒径を有する、Ｗ粉末、Ｎｉ粉末、
およびＣｏ粉末を用意した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the face milling tool of the present invention will be specifically described with reference to embodiments. First, as raw material powders for forming a hard phase core, all have a predetermined average particle size in the range of 1 to 2 μm, and all have an atomic ratio of (T
i 0.9 Ta 0.1) C 0.7 N 0.3 Ti composite carbonitride powder Ta having a composition of, (Ti 0.9 Nb 0.1) C 0.7 N 0.3 Ti composite carbonitride powder Nb having a composition of, (Ti 0.8 Ta
0.1 Zr 0.1 ) C 0.5 N 0.5 Ti, Ta and Zr
Complex carbonitride powder, (Ti 0.7 W 0.3) C 0.5 complex carbonitride powder of Ti and W having a composition of N 0 .5, Ti 0.7 W 0.2 N
b 0.1) C 0.4 N complex carbonitride powder composition have been Ti and W and Nb of 0. 6, (Ti 0.9 V 0.1 ) C 0.6 N 0. 4 composition with a Ti and V complex carbonitride powder , (Ti 0.8 V 0.1 Zr
0.1) C 0.7 N 0 .3 Ti and V and complex carbonitride powder Zr having a composition of, (Ti 0.7 Zr 0.3) C 0.5 N 0.5 Ti composite carbonitride powder Zr having a composition of, (Ti 0.8 Ta 0.1 N
b 0.1) C 0.7 N 0.3 Ti, Ta and complex carbonitride powder Nb having a composition of, and (Ti 0. 7 Ta 0.1 V 0.1 W 0.1)
A composite carbonitride powder of Ti, Ta, V, and W having a composition of C 0.6 N 0.4 was prepared, and as a raw material powder for forming a peripheral portion of a hard phase, each was also a predetermined average within a range of 1 to 2 μm. A TiN powder, a ZrC powder, a TaC powder, an NbC powder, and a WC powder having a particle size are prepared, and all have a predetermined average particle size in the range of 1 to 2 μm as a raw material powder for forming a bonding phase. , W powder, Ni powder,
And Co powder were prepared.
【００１０】これら原料粉末を表１，２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、１５ｋｇｆ／ｍｍ２の圧力で圧粉体にプレス成
形し、この圧粉体を、１５５０℃まで真空中、２℃／分
の昇温速度で昇温、１５５０℃に昇温後、雰囲気を５ｔ
ｏｒｒの減圧窒素雰囲気に変えて１．５時間保持して、
炉冷の条件で燒結し、燒結後、主切刃およびさらい刃に
それぞれ０．２０（主切刃）および０．１５（さらい
刃）のホーニングを施すことにより、いずれもＳＥＥＮ
１２０３ＡＦＴＮ１の形状を基本とし、それぞれ表３、
４に示される稜線角をもった本発明正面フライス工具用
チップ（以下、本発明チップと云う）１〜１０および比
較正面フライス工具用チップ（以下、比較チップと云
う）１〜１０をそれぞれ製造した。なお、比較チップ１
〜１０は、これの結合相におけるＷ含有量が7重量％以
下か、あるいは結合相がＷ成分を含有しないものであ
る。These raw material powders are blended in the composition shown in Tables 1 and 2, wet-mixed in a ball mill for 72 hours, dried, and then pressed into a green compact at a pressure of 15 kgf / mm2. Was heated in vacuum to a temperature of 1550 ° C. at a rate of 2 ° C./min.
or 1.5 hours by changing to a reduced pressure nitrogen atmosphere
After sintering under the condition of furnace cooling, and after sintering, the main cutting edge and the scouring blade are subjected to honing of 0.20 (main cutting edge) and 0.15 (washing edge), respectively, so that both are SEEN.
Based on the shape of 1203AFTN1, Table 3,
The chips for a face milling tool of the present invention (hereinafter, referred to as the present invention chips) 1 to 10 and the chips for a comparative face milling tool (hereinafter, referred to as comparative chips) 1 to 10 having the ridge line angles shown in FIG. . Note that the comparative chip 1
10 to 10 indicate that the W content in the binder phase is 7% by weight or less, or the binder phase does not contain a W component.
【００１１】この結果得られた各種のチップについて、
その任意断面を光学顕微鏡により組織観察し、その組織
から画像解析装置を用いて、いずれも有芯構造を有する
硬質相の割合を測定したところ、表３、４に示される値
を示した。また、同じくチップの結合相について、湿式
成分分析法を用いて、Ｗ、Ｎｉ、およびＣｏの含有量
（結合相に占める重量割合）を測定したところ、同じく
表３、４に示される値を示した。Regarding the various chips obtained as a result,
The structure of the arbitrary cross section was observed with an optical microscope, and the ratio of the hard phase having a cored structure was measured from the structure using an image analyzer, and the values shown in Tables 3 and 4 were obtained. Similarly, when the contents of W, Ni, and Co (the weight ratio in the bonding phase) of the bonding phase of the chip were measured using a wet component analysis method, the values shown in Tables 3 and 4 were also shown. Was.
【００１２】ついで、上記の各種チップのそれぞれを、
図1（ａ）に示される通り、正面直径：２００ｍｍのリ
ング状工具本体の正面に１０個を１組として等間隔に、
かつ表３、４に示されるアキシャルレーキ角で取り付け
て（ネジ止め）正面フライス工具とし、この状態で、 被削材：ＪＩＳ：ＳＣＭ４４０の板材、 切削速度：３５０ｍ／ｍｉｎ、 切り込み：２ｍｍ、 送り：０．４mm／刃、 時間：２０分、 の条件で合金鋼の乾式高送り高速切削試験を行い、１
組：１０個のそれぞれのチップの最大逃げ面摩耗幅を測
定し、この結果を表３、４に１０個の平均値として示し
た。Next, each of the above various chips is
As shown in FIG. 1 (a), the front face of a ring-shaped tool body having a front diameter of 200 mm is set as a set of 10 pieces at regular intervals,
In addition, a face milling tool was mounted (screwed) at the axial rake angles shown in Tables 3 and 4, and in this state, work material: JIS: SCM440 plate material, cutting speed: 350 m / min, depth of cut: 2 mm, feed: A dry high-feed high-speed cutting test of alloy steel was performed under the conditions of 0.4 mm / tooth, time: 20 minutes.
Set: The maximum flank wear width of each of the ten chips was measured, and the results are shown in Tables 3 and 4 as the average value of the ten chips.
【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]
【発明の効果】表１〜４に示される結果から、本発明チ
ップ１〜１０を取り付けてなる正面フライス工具におい
ては、前記チップを構成する炭窒化チタン系サーメット
の硬質相を上記の通りに特定し、さらに結合相に高い割
合でＷ成分を含有させた結果として、チップの稜線角を
小さくすると共に、工具本体へのチップの取り付け角を
切削面に対して相対的に小さくした状態で、高送り高速
切削を行っても切刃部に欠けやチッピングの発生がなく
なり、すぐれた切削性能を発揮するのに対して、比較チ
ップ１〜１０を取り付けてなる正面フライス工具におい
ては、これを構成する炭窒化チタン系サーメットが、そ
の硬質相は上記本発明チップ１〜１０と同種であるが、
その結合相にはＷ成分の含有がなく、またあっても高々
７重量％程度の含有では所望のすぐれた耐熱性および耐
熱塑性変形性、さらに高温強度を結合相に確保すること
はできず、この結果切刃部には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、この発明の正面フライス
工具は、高送り高速切削を可能とするものであり、した
がって切削加工の省力化および省エネ化、さらに低コス
ト化に大いに寄与するものである。From the results shown in Tables 1 to 4, in the face milling tool to which the chips 1 to 10 of the present invention are attached, the hard phase of the titanium carbonitride cermet constituting the chip is specified as described above. In addition, as a result of including the W component in the binder phase at a high ratio, the ridge angle of the tip is reduced, and the mounting angle of the tip to the tool body is relatively reduced with respect to the cutting surface. Chipping and chipping do not occur in the cutting edge portion even when high-speed cutting is performed, and excellent cutting performance is exhibited. On the other hand, in a face milling tool having comparative tips 1 to 10, this is constituted. Titanium carbonitride-based cermet, the hard phase of which is the same as the present invention chips 1-10,
The binder phase does not contain the W component, and even if the content is at most about 7% by weight, the desired excellent heat resistance, heat-resistant plastic deformation property, and high-temperature strength cannot be ensured in the binder phase. As a result, it is clear that chipping and chipping occur in the cutting blade portion, which causes a short service life in a relatively short time. As described above, the face milling tool of the present invention enables high-feed high-speed cutting, and thus greatly contributes to labor saving, energy saving, and cost reduction in cutting.
【図1】（ａ）は正面フライス工具を例示する斜視図、
（ｂ）はチップを例示する斜視図、そして（ｃ）はチッ
プの縦断面図である。FIG. 1A is a perspective view illustrating a face milling tool,
(B) is a perspective view illustrating a chip, and (c) is a longitudinal sectional view of the chip.
【図２】（ａ）は正面フライス工具の半部切欠き正面
図、そして（ｂ）はこれの半部縦断面拡大図（ｂ）であ
る。FIG. 2 (a) is a front view of a half notch of a face milling tool, and FIG. 2 (b) is a half-length longitudinal cross-sectional enlarged view thereof.
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１２年３月２日（２０００．３．２）[Submission date] March 2, 2000 (200.3.2)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１１】この結果得られた各種のチップについて、
その任意断面を走査型電子顕微鏡により組織観察し、そ
の組織から画像解析装置を用いて、いずれも有芯構造を
有する硬質相の割合を測定したところ、表３、４に示さ
れる値を示した。また、同じくチップの結合相につい
て、湿式成分分析法を用いて、Ｗ、Ｎｉ、およびＣｏの
含有量（結合相に占める重量割合）を測定したところ、
同じく表３、４に示される値を示した。Regarding the various chips obtained as a result,
The structure of any of the cross sections was observed with a scanning electron microscope, and the ratio of the hard phase having a cored structure was measured from the structure using an image analyzer. The values shown in Tables 3 and 4 were obtained. . Similarly, when the content of W, Ni, and Co (the weight ratio in the binder phase) was measured for the binder phase of the chip using a wet component analysis method,
Similarly, the values shown in Tables 3 and 4 are shown.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 福村 昌史 茨城県結城郡石下町大字古間木1511番地 三菱マテリアル株式会社筑波製作所内 (72)発明者 辻崎 久史 茨城県結城郡石下町大字古間木1511番地 三菱マテリアル株式会社筑波製作所内 Ｆターム(参考） 3C022 HH01 HH12 LL00 LL01 LL02 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masafumi Fukumura 1511 Furamagi, Ishishita-cho, Yuki-gun, Ibaraki Prefecture Inside the Tsukuba Works, Mitsubishi Materials Corporation (72) Inventor Hisashi Tsujizaki 1511 Furimagi, Ishishita-cho, Yuki-gun, Ibaraki Prefecture Address Mitsubishi Materials Corporation Tsukuba Factory F-term (reference) 3C022 HH01 HH12 LL00 LL01 LL02
Claims (1)
ーアウエイチップを着脱自在に取り付けてなる正面フラ
イス工具において、 （ａ）上記スローアウエイチップを、 断面の顕微鏡組織観察で、硬質相が７５〜９５面積％を
占め、残りが結合相と不可避不純物からなる組織を示
し、 上記硬質相が、芯部および周辺部が実質的にＴｉとＭの
複合炭窒化物（ただし、ＭはＴａ，Ｎｂ，Ｖ，Ｗ，およ
びＺｒのうちの１種または２種以上を示す）からなる有
芯構造を有し、 かつ上記結合相が、結合相に占める重量割合で、 Ｗ：１５〜３５％、 Ｎｉ：１０〜５０％、 Ｃｏ：２０〜７０％、を含有するＣｏ−Ｎｉ−Ｗ系合金
（ただし、Ｗ＋Ｎｉ＋Ｃｏ＝９０％以上）からなる炭窒
化チタン系サーメットで構成すると共に、 （ｂ）このスローアウエイチップの切刃稜線部における
すくい面と逃げ面の交わる角度を６５〜７５度とし、 （ｃ）さらに、このスローアウエイチップを上記リング
状工具本体に１５〜３０度のアキシャルレーキ角（前記
工具本体の軸線に対する傾き角）で取り付けてなる、こ
とを特徴とする高送り高速切削でスローアウエイチップ
がすぐれた耐欠損性を発揮する正面フライス工具。1. A face milling tool having a plurality of throw-away tips detachably mounted on a front surface of a ring-shaped tool main body, wherein (a) the above-mentioned throw-away tip has a hard phase of 75% by microscopic observation of a cross section.硬 質 95% by area, and the remainder is composed of a binder phase and unavoidable impurities. The hard phase is substantially composed of a composite carbonitride of Ti and M (where M is Ta, Nb). , V, W, and Zr), and the binder phase has a core content of 15 to 35% by weight of the binder phase, Ni: : 10 to 50%, Co: 20 to 70%, a titanium-carbonitride-based cermet made of a Co-Ni-W-based alloy (W + Ni + Co = 90% or more), and (b) this throw-out H The angle at which the rake face and the flank intersect at the cutting edge ridge of the tip is 65 to 75 degrees. (C) Furthermore, the axial rake angle (15 to 30 degrees) of the throw-away tip is attached to the ring-shaped tool body. A face milling tool that is mounted at an angle of inclination with respect to the axis of the main body, and that has a high-speed, high-speed cutting and a throw-away tip that exhibits excellent chipping resistance.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11204083A JP2001030108A (en) | 1999-07-19 | 1999-07-19 | Front milling tool displaying excellent defect resistance of throwaway tip in high feeding and speed cutting |
| CN00117605A CN1117168C (en) | 1999-04-05 | 2000-04-05 | Cutting insert blade for metallic ceramic |
| DE60006017T DE60006017T2 (en) | 1999-04-05 | 2000-04-05 | Cermet cutting insert |
| EP00107084A EP1043414B1 (en) | 1999-04-05 | 2000-04-05 | Cermet cutting insert |
| HK01102312A HK1031743A1 (en) | 1999-04-05 | 2001-03-30 | Cermet cutting insert |
| HK01103268A HK1032609A1 (en) | 1999-04-05 | 2001-05-09 | Cermet cutting insert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11204083A JP2001030108A (en) | 1999-07-19 | 1999-07-19 | Front milling tool displaying excellent defect resistance of throwaway tip in high feeding and speed cutting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001030108A true JP2001030108A (en) | 2001-02-06 |
Family
ID=16484512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11204083A Pending JP2001030108A (en) | 1999-04-05 | 1999-07-19 | Front milling tool displaying excellent defect resistance of throwaway tip in high feeding and speed cutting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001030108A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016087742A (en) * | 2014-11-05 | 2016-05-23 | 株式会社タンガロイ | Cermet tool and surface-coated cermet tool |
-
1999
- 1999-07-19 JP JP11204083A patent/JP2001030108A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016087742A (en) * | 2014-11-05 | 2016-05-23 | 株式会社タンガロイ | Cermet tool and surface-coated cermet tool |
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