JPS62218010A - Carbide drill - Google Patents
Carbide drillInfo
- Publication number
- JPS62218010A JPS62218010A JP6135886A JP6135886A JPS62218010A JP S62218010 A JPS62218010 A JP S62218010A JP 6135886 A JP6135886 A JP 6135886A JP 6135886 A JP6135886 A JP 6135886A JP S62218010 A JPS62218010 A JP S62218010A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- carbide
- tungsten carbide
- center
- center section
- 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
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000002245 particle Substances 0.000 abstract description 9
- 238000005553 drilling Methods 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 31
- 229910001315 Tool steel Inorganic materials 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 241000219122 Cucurbita Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、炭化タングステンを主成分とした超硬合金に
よる超硬ドリルに関するしのである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a cemented carbide drill made of a cemented carbide whose main component is tungsten carbide.
「従来の技術Ｊ
ル本体全体を、炭化タングステン（Ｗ Ｃ）あるいは炭
化チタン（ＴｉＣ）を主成分とした超硬合金によって均
質に形成したしのが種々開発されている。``Prior Technology J'' Various types of metal moldings have been developed in which the entire body is homogeneously made of cemented carbide whose main component is tungsten carbide (WC) or titanium carbide (TiC).
「発明が解決しようとする問題点」
ところで、一般に、炭化タングステンや炭化チタンを主
成分とした超硬合金は、高速度工具鋼と比較して硬度が
高い。"Problems to be Solved by the Invention" Generally, cemented carbide containing tungsten carbide or titanium carbide as a main component has higher hardness than high-speed tool steel.
そのため、超硬ドリルは、高速度工具鋼製のドリルと比
較して磨耗しに＜＜、高速切削を行うことができ、これ
によって加工能率の向」二を図ることができる。Therefore, carbide drills can perform high-speed cutting with less wear compared to drills made of high-speed tool steel, thereby improving machining efficiency.
しかしながら、従来の超硬ドリルは、送り速度を向上さ
せることが難しいという問題があった。However, conventional carbide drills have a problem in that it is difficult to increase the feed rate.
これは、超硬合金が硬い反面脆いため、ドリル全体を均
質な超硬合金によって形成した従来のドリルでは、ドリ
ル先端の軸線近傍部分がそこに作用するスラスト荷重に
よって圧壊する虞れがあるからであり、高送りしようと
するとそれに伴ってスラスト荷重が増大し、圧壊の危険
性かより一層増大することになる。、１．たがって、従
来の＃Ｅ硬ドリルにおいては、穴明は加工の能率向上を
図るにら一定の限度があり、また寿命の点で乙十分に満
足し得るものとは言い難かった。This is because while cemented carbide is hard, it is brittle, so in conventional drills where the entire drill is made of homogeneous cemented carbide, there is a risk that the part near the axis of the drill tip will be crushed by the thrust load acting there. However, if a high feed rate is attempted, the thrust load will increase accordingly, further increasing the risk of crushing. , 1. Therefore, in the conventional #E hard drill, there is a certain limit to the ability to drill holes in order to improve machining efficiency, and it is difficult to say that the drill is fully satisfactory in terms of service life.
そこで、ドリルの軸線近傍部分の圧壊の危険性を軽減す
るために、各種成分の含有比率を変えるなどして靭性を
向上させた超硬合金を選出し、ドリル全体、あるいはド
リル本体をこの靭性を高めた超硬合金によって製造する
ことが種々研究された。しかし、成分の含有比の調整に
よって靭性を高めた超硬合金は、それに反して硬度が低
下する傾向があり、したがって、このような対処では、
送り速度は向上させることができるが、その反面で硬度
の低下による切削速度の低下を余義なくされ、したがっ
て根本的な解決策とはいえなかった。Therefore, in order to reduce the risk of crushing near the axis of the drill, we selected a cemented carbide whose toughness has been improved by changing the content ratio of various components, and we have improved the toughness of the entire drill or the drill body. Various studies have been conducted on manufacturing with high-grade cemented carbide. However, cemented carbide whose toughness has been increased by adjusting the content ratio of its components tends to decrease in hardness.
Although the feed rate could be increased, on the other hand, the cutting speed had to be lowered due to the decrease in hardness, so this could not be considered a fundamental solution.
この発明は、前記事情に鑑みてなされたもので、炭化タ
ングステンを主成分とした超硬合金による超硬ドリルに
おいて、高速切削を行うことができるのは勿論のこと、
高送り切削をも行うことができ、したがって穴明は加工
の能率を大幅に向上さけることができ、しかし寿命の向
上を図ることができる超硬ドリルを提供することを目的
とする。This invention was made in view of the above circumstances, and it goes without saying that high-speed cutting can be performed with a cemented carbide drill made of cemented carbide whose main component is tungsten carbide.
The object of the present invention is to provide a carbide drill that can perform high-feed cutting, thereby greatly improving machining efficiency and improving the life of the drill.
「問題点を解決するための手段Ｊ
この発明に係る超硬ドリルは、ドリル本体がドリルの軸
線を含む中心部とこの中心部周囲の外周部とによって２
層構造をなし、これらの中心部および外周部がそれぞれ
炭化タングステンを主成分とした超硬合金によって形成
され、かつ前記中心部では炭化タングステンの平均粒径
か３〜１０ミクロンに設定され、また外周部では炭化タ
ングステンの平均粒径が０．５ミクロンに設定されてい
る。``Means for Solving the Problems J'' The carbide drill according to the present invention has a drill body that is divided into two parts by a center part including the axis of the drill and an outer peripheral part around the center part.
The central part and the outer periphery are respectively formed of a cemented carbide mainly composed of tungsten carbide, and the average grain size of tungsten carbide is set to 3 to 10 microns in the central part, and the outer periphery is made of a cemented carbide having a layered structure. In this section, the average grain size of tungsten carbide is set to 0.5 microns.
「作用」
一般に、切削時のドリルにおいて、回転速度は理論上で
はドリルの軸線上でゼロで、ドリルの軸線から離れるに
したがって大きくなり、外周で最大となる。したがって
、耐摩耗性を得るために要求される硬度は、ドリルの刃
部（すなわち、ドリルの外周部分）には必要となるが、
ドリルの軸線近傍部分においてはそれほど必要とならな
い。また穿孔時のドリルにおいて、スラスト荷重は主に
ドリルの軸線に沿ったドリルの中心部分に作用するため
、この部分には圧壊を防止することから高い靭性が要求
される。"Operation" Generally, in a drill during cutting, the rotational speed is theoretically zero on the axis of the drill, increases as it moves away from the axis of the drill, and reaches its maximum at the outer periphery. Therefore, the hardness required to obtain wear resistance is necessary for the drill bit (i.e., the outer circumference of the drill), but
It is not so necessary in the vicinity of the axis of the drill. Furthermore, in a drill during drilling, the thrust load mainly acts on the central portion of the drill along the axis of the drill, so this portion is required to have high toughness to prevent crushing.
この発明に係る超硬ドリルでは、中心部と外周部とで、
特性が変わり、それぞれその部位に適した特性が得られ
る。In the carbide drill according to the present invention, the center portion and the outer peripheral portion include
The characteristics change, and each region can obtain characteristics that are suitable for that area.
すなわち、ドリル本体の外周部は、炭化タングステンの
粒径が小さいため、より均質化されて切刃の全域に亙っ
て高い硬度を均等に得ることができて、切刃の全域に亙
って高い耐摩耗性を確保して、高速切削に適した特性を
得ることができる。In other words, since the particle size of tungsten carbide is small in the outer circumference of the drill body, it is more homogenized and can evenly obtain high hardness over the entire cutting edge. High wear resistance can be ensured and properties suitable for high-speed cutting can be obtained.
これに対して、ドリル本体の中心部は、炭化タングステ
ンの粒径が大きく、炭化タングステンの粒一つ当たりの
他の成分との接合面積が増大ずろこと等のために、成分
相互の結合力が増大し、前述の外周部と比較すると、硬
度では若干性能が低下するかもしれないが、成分相互の
結合力の増大のために靭性が向上し、スラスト荷重等に
対する強度が増大し、高送り切削した場合にも圧壊しに
くくなり、高送り切削に適した特性を得ろことができる
。On the other hand, in the center of the drill body, the tungsten carbide grain size is large, and the bonding area of each tungsten carbide grain with other components increases, so the bonding force between the components is weaker. Although the performance may be slightly lower in terms of hardness than the outer periphery mentioned above, the toughness is improved due to the increased bonding force between the components, and the strength against thrust loads etc. is increased, making it possible to perform high-feed cutting. Even when the material is cut, it is less likely to be crushed, making it possible to obtain properties suitable for high-feed cutting.
したがって、本発明に係る超硬ドリルにおいては、高速
切削時に要求されろ耐摩耗性と、高送り切削時に要求さ
れる靭性とが兼ね備えられることになり、高速切削を行
うことができるのは勿論のこと、高送り切削をも行うこ
とができ、したがって穴明は加工の能率を大幅に向上さ
せることができるとと乙に、寿命の向上を図ることがで
きる。Therefore, the carbide drill according to the present invention has both the wear resistance required for high-speed cutting and the toughness required for high-feed cutting, and can of course perform high-speed cutting. In addition, it is possible to perform high-feed cutting, and therefore the drilling efficiency can be greatly improved, and the service life can be improved.
「実施例」
第１図および第２図は本発明に係る超硬ドリルの一実施
例を示したものである。"Embodiment" FIGS. 1 and 2 show an embodiment of a carbide drill according to the present invention.
この超硬ドリルは、ドリル本体ｌがドリルの軸線２を含
む中心部１ａとこの中心部１ａの周囲の外周部１ｂとに
よって２層構造をなし、これらの中心部ｌａおよび外周
部１ｂがそれぞれ炭化タングステンを主成分とした超硬
合金によって形成されたものであるが、前記中心部１ａ
では炭化タングステンの平均粒径が３〜１０ミクロンに
設定され、また外周部ｌｂでは炭化タングステンの平均
粒径が０．５ミクロンに設定されている。This carbide drill has a drill body l having a two-layer structure consisting of a center part 1a including the axis 2 of the drill and an outer circumferential part 1b surrounding this center part 1a, and these center part la and outer circumferential part 1b are each carbonized. The center portion 1a is made of cemented carbide containing tungsten as a main component.
In this example, the average grain size of tungsten carbide is set to 3 to 10 microns, and the average grain size of tungsten carbide is set to 0.5 micron in the outer peripheral portion lb.
以上の如き各部における炭化タングステンの拉径は、多
大な実験データを分析することにより、最適値として選
定された乙のである。The diameter of the tungsten carbide in each part as described above was selected as the optimum value by analyzing a large amount of experimental data.
なお、ドリルの外径をＤとしたとき、前述の中心部１ａ
の直径ｄとしては、Ｄ／１５≦（Ｉ≦Ｄ１５とするのが
望ましい。In addition, when the outer diameter of the drill is D, the above-mentioned center part 1a
The diameter d is preferably D/15≦(I≦D15).
そして、上記のように形成されたドリル本体ｌには、従
来のドリルと同様に、外周に切屑排出溝２・２が形成さ
れ、各切屑排出ｉ２の回転方向を向く壁面と先端逃げ而
３とのなす稜に切刃４が形成されている。これらの切刃
４・４間には、チゼル部５が形成されている。このチゼ
ル部５は、シンニングが施されることにより、中心部１
ａにのみ形成されている。The drill body l formed as described above has chip discharge grooves 2, 2 formed on the outer periphery, as well as a wall surface facing the rotational direction of each chip discharge i2, and a tip relief groove 3, similar to a conventional drill. A cutting edge 4 is formed on the ridge. A chisel portion 5 is formed between these cutting edges 4. This chisel portion 5 is thinned so that the center portion 1
It is formed only in a.
以上の如き超硬ドリルにおいては、中心部１ａと外周部
ｉｂとで、特性が変わり、それぞれその部位に適した特
性が得られる。In the carbide drill as described above, the characteristics differ between the central portion 1a and the outer peripheral portion ib, and characteristics suitable for each portion can be obtained.
すなわち、ドリル本体ｌの外周部１ｂは、炭化タングス
テンの粒径が小さいため、より均質化されて切刃４の全
域に亙って高い硬度を均等に得ることができて、切刃４
の全域に亙って高い耐摩耗性を確保することができ、高
速切削に適した特性を有したものとすることかできる。That is, since the particle size of tungsten carbide is small, the outer circumferential portion 1b of the drill body 1 is more homogenized, and high hardness can be uniformly obtained over the entire area of the cutting edge 4.
It is possible to ensure high wear resistance over the entire range, and it is possible to have characteristics suitable for high-speed cutting.
これに対して、ドリル本体ｌの中心部１ａは、炭化タン
グステンの粒径が大きく、炭化タングステンの粒一つ当
たりの他の成分との接合面積が増大すること等のために
、成分相互の結合力が増大し、前述の外周部と比較する
と、硬度では若干性能が低下するかもしれないが、成分
相互の結合力の増大のために靭性が向上し、スラスト荷
重等に対する強度が増大し、高送り切削した場合にも圧
壊しにくくなり、高送り切削に適した特性を有したもの
とすることができる。On the other hand, in the center part 1a of the drill body 1, the tungsten carbide particles have a large particle size, and the bonding area of each tungsten carbide particle with other components increases, so the components bond with each other. The force increases, and the hardness performance may decrease slightly compared to the outer periphery described above, but the toughness improves due to the increase in the bonding force between the components, and the strength against thrust loads increases. It is difficult to crush even when subjected to feed cutting, and can have characteristics suitable for high feed cutting.
したがって、上述の超硬ドリルにおいては、高速切削時
に要求される耐摩耗性と、高送り切削時に要求される靭
性とが兼ね備えられることになり、高速切削を行うこと
ができるのは勿論のこと、高送り切削をも行うことかで
き、したがって穴明は加工の能率を大幅に向上させるこ
とができるとともに、寿命の向上を図ることができる。Therefore, the above-mentioned carbide drill has both the wear resistance required for high-speed cutting and the toughness required for high-feed cutting, and of course can perform high-speed cutting. High-feed cutting can also be performed, and therefore the drilling efficiency can be greatly improved, and the service life can be improved.
なお、実際に上記実施例の超硬ドリルを、本願出願人が
先に出願した特願昭５８−１５５５２６に記載の製造法
を利用して製作し、実際に穴明は加工を行ってみた。そ
の時のデータは次の通りである。Incidentally, the carbide drill of the above embodiment was actually manufactured using the manufacturing method described in Japanese Patent Application No. 58-155526 previously filed by the applicant of the present application, and drilling was actually performed. The data at that time is as follows.
上記実験データから明らかなように、この実施例の超硬
ドリルによれば、高速度工具鋼製のドリルおよび従来の
超硬ドリルのいずれよりも、穴明ｒ＋ｈｎ 丁 ａ）
台上 虫 メ一 ｔｌ μ 七 斗 礒へ
−１４器 ｌ−メ一 白 １ 七 ↓ト １ことがで
きた。As is clear from the above experimental data, the carbide drill of this example has a better hole diameter than both the high-speed tool steel drill and the conventional carbide drill.
Desk Mushi Meichi tl μ Seven To Isou
-14 device l-me one white 1 seven ↓to 1 was able to do it.
なお、上記一実施例においては、ドリル本体ｌの先端側
の刃部（図に示した部分）から基端側のシャンク部のま
で、全長を超硬合金製としたが、例えば、先端側の刃部
だけを前述のごとき超硬合金による２層構造とし、基端
側のシャンク部は鋼製とし、これらの刃部とシャンク部
とをろう付けするようにしても良い。In the above embodiment, the entire length of the drill body l from the tip side blade part (the part shown in the figure) to the proximal side shank part is made of cemented carbide. Only the blade portion may have a two-layer structure made of cemented carbide as described above, and the shank portion on the proximal end side may be made of steel, and these blade portions and the shank portion may be brazed.
また、上記一実施例においては、中心部１ａの中心軸線
をドリルの軸線Ｋに一致させたが、第３図および第４図
に示すように、中心部１ａの中心軸線りをドリルの軸線
Ｋからずらして設けても良い。Further, in the above embodiment, the center axis of the center portion 1a was made to coincide with the axis K of the drill, but as shown in FIGS. 3 and 4, the center axis of the center portion 1a was aligned with the axis K of the drill. It may also be provided offset from the above.
このように偏心させることにより、耐摩耗性および耐欠
損性を向上させろとともに偏磨耗の防止を促進させるこ
とができた。By making it eccentric in this way, it was possible to improve the wear resistance and chipping resistance, and to promote the prevention of uneven wear.
また、上記一実施例においては、中心部１ａの横断面形
状を真円としたが、第５図および第６図に示すように正
方形にしても良く、また第７図の（イ ）（口 ）（ハ
）（ニ）等に示すように、三角形、六角ＪＦり、長円、
ひょうたん形などにすることし考えられ、また楕円等も
考えることかできる。このように中心部１ａの形状を変
化させて外周部１ｂと中心部１ａとの係合力の強化を図
ることにより、高速度穿孔に対する性能をより向上さけ
ることが可能になる。Further, in the above embodiment, the cross-sectional shape of the center portion 1a is a perfect circle, but it may be square as shown in FIGS. 5 and 6. ) (c) (d) etc., triangle, hexagonal JF, ellipse,
You can think of making it in the shape of a gourd, or you can also think of something like an ellipse. By changing the shape of the center portion 1a in this manner and strengthening the engagement force between the outer peripheral portion 1b and the center portion 1a, it is possible to further improve the performance for high-speed drilling.
「発明の効果」
以上の説明から明らかなように、本発明に係る超硬ドリ
ルは、ドリル本体がドリルの軸線を含む中心部とこの中
心部周囲の外周部とによって２層構造をなし、これらの
中心部および外周部がそれぞれ炭化タングステンを主成
分とした超硬合金によって形成され、かつ前記中心部で
は炭化タングステンの平均粒径が３〜１０ミクロンに設
定され、また外周部では炭化タングステンの平均粒径が
０゜５ミクロンに設定されたため、中心部と外周部とで
、特性が変わり、それぞれその部位に適した特性が得ら
れる。"Effects of the Invention" As is clear from the above description, the carbide drill according to the present invention has a drill body that has a two-layer structure consisting of a center part including the axis of the drill and an outer peripheral part around this center part. The center and outer periphery of the tungsten carbide are formed of a cemented carbide mainly composed of tungsten carbide, and the average particle size of tungsten carbide is set to 3 to 10 microns in the center, and the average particle size of tungsten carbide is set to 3 to 10 microns in the outer periphery. Since the particle size is set to 0.5 microns, the characteristics change between the center and the outer periphery, and characteristics suitable for each region can be obtained.
すなイつち、ドリル本体の外周部は、炭化タングステン
の粒径が小さいため、より均質化されて切刃の全域に亙
って高い硬度を均等に得ることができて、切刃の全域に
亙って高い耐摩耗性を確保して、高速切削に適した特性
を得ることかできる。In other words, the outer periphery of the drill body has a small grain size of tungsten carbide, so it is more homogenized and can evenly obtain high hardness over the entire area of the cutting edge. It is possible to ensure high wear resistance over a long period of time and obtain characteristics suitable for high-speed cutting.
これに対して、ドリル本体の中心部は、炭化タングステ
ンの粒径か大きく、炭化タングステンの粒一つ当たりの
他の成分との接合面積か増大すること等のために、成分
相互の結合力か増大し、重連の外周部と比較すると、硬
度では若干性能が低下するからしれないが、成分相互の
結合力の増大のために靭性が向上し、スラスト荷重等に
対する強度が増大し、高送り切削した場合に乙圧壊しに
くくなり、高送り切削に適した特性を得ることができる
。On the other hand, in the center of the drill body, the grain size of tungsten carbide is large and the bonding area of each grain of tungsten carbide with other components increases, so the bonding force between the components is weak. Compared to the outer periphery of a heavy chain, performance may be slightly lower in hardness, but the increased bonding strength between the components improves toughness, increases strength against thrust loads, etc., and allows for high feed rates. It is less prone to crushing when cut, and has characteristics suitable for high-feed cutting.
したがって、本発明に係る超硬ドリルにおいては、高速
切削時に要求される耐摩耗性と、高送り切削時に要求さ
れる靭性とが兼ね備えられることになり、高速切削を行
うことができるのは勿論のこと、高送り切削をら行うこ
とができ、したがって穴明は加工の能率を大幅に向上さ
けることができるとともに、寿命の向上を図ることがで
きる。Therefore, the carbide drill according to the present invention has both the wear resistance required for high-speed cutting and the toughness required for high-feed cutting, and can of course perform high-speed cutting. In addition, high-feed cutting can be performed, and therefore, drilling efficiency can be greatly improved, and the service life can be improved.
第１図および第２図はそれぞれ本発明に係る超硬ドリル
の一実施例を示したしので、第１図は一部を省略した側
面図、第２図は正面図、第３図および第４図はそれぞれ
本発明の他の実施例を示したもので、第３図は一部を省
略した側面図、第４図は正面図、第５図および第６図は
それぞれ本発明のさらに他の実施例を示したもので、第
５図は一部を省略した側面図、第６図は正面図、第７図
（イ）（ロ）（ハ）（ニ）はそれぞれ本発明に係る超硬
ドリルの中心部の横断面形状の変形例の説明図である。
Ｉ・・・・・・ドリル本体、ｌａ・・・・・・中心部、
ｌｂ・・・・・・外周部、２・・・・・・切屑排出ｔｒ
、３・・・・・・逃げ面、４・・・・・・切刃、５・・
・・・・チゼル部。
出顎人 三菱金属株式会社1 and 2 each show an embodiment of the carbide drill according to the present invention, so FIG. 1 is a partially omitted side view, FIG. 2 is a front view, and FIGS. 4 each show other embodiments of the present invention, FIG. 3 is a partially omitted side view, FIG. 4 is a front view, and FIGS. 5 and 6 each show still other embodiments of the present invention. Fig. 5 is a partially omitted side view, Fig. 6 is a front view, and Figs. FIG. 7 is an explanatory diagram of a modification of the cross-sectional shape of the central portion of the hard drill. I: Drill body, la: Center part,
lb...Outer periphery, 2...Chip discharge tr
, 3... Flank surface, 4... Cutting edge, 5...
...Chisel part. Jaw Man Mitsubishi Metals Co., Ltd.
Claims (1)
囲の外周部とによって２層構造をなし、これらの中心部
および外周部がそれぞれ炭化タングステンを主成分とし
た超硬合金によって形成され、かつ前記中心部では炭化
タングステンの平均粒径が３〜１０ミクロンに設定され
、また外周部では炭化タングステンの平均粒径が０．５
ミクロンに設定されたことを特徴とする超硬ドリル。The drill body has a two-layer structure consisting of a center part including the axis of the drill and an outer peripheral part around the center part, and the center part and the outer peripheral part are each formed of a cemented carbide mainly composed of tungsten carbide, and The average grain size of tungsten carbide in the central part is set to 3 to 10 microns, and the average grain size of tungsten carbide in the outer peripheral part is set to 0.5 microns.
A carbide drill characterized by being set to microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6135886A JPS62218010A (en) | 1986-03-19 | 1986-03-19 | Carbide drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6135886A JPS62218010A (en) | 1986-03-19 | 1986-03-19 | Carbide drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62218010A true JPS62218010A (en) | 1987-09-25 |
Family
ID=13168855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6135886A Pending JPS62218010A (en) | 1986-03-19 | 1986-03-19 | Carbide drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62218010A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0297510U (en) * | 1989-01-24 | 1990-08-03 | ||
| US4971485A (en) * | 1989-01-26 | 1990-11-20 | Sumitomo Electric Industries, Ltd. | Cemented carbide drill |
| US5022801A (en) * | 1990-07-18 | 1991-06-11 | The General Electric Company | CVD diamond coated twist drills |
| JPH03129434U (en) * | 1990-04-12 | 1991-12-26 | ||
| US5137398A (en) * | 1990-04-27 | 1992-08-11 | Sumitomo Electric Industries, Ltd. | Drill bit having a diamond-coated sintered body |
| US5154550A (en) * | 1990-02-20 | 1992-10-13 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill bit |
| US5154549A (en) * | 1990-02-05 | 1992-10-13 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill bit |
| US5228812A (en) * | 1989-12-25 | 1993-07-20 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill |
| US6132148A (en) * | 1996-02-15 | 2000-10-17 | Habit Diamond Limited | Machining tool and method for forming same |
| US20090136305A1 (en) * | 2005-10-03 | 2009-05-28 | Mitsubishi Materials Corporation | Boring tool and method of boring pilot hole |
| US20100290849A1 (en) * | 2009-05-12 | 2010-11-18 | Tdy Industries, Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| JP2011200935A (en) * | 2010-03-15 | 2011-10-13 | Ewag Ag | Laser machining apparatus and method for manufacture of rotationally symmetrical tool |
| US8841005B2 (en) | 2006-10-25 | 2014-09-23 | Kennametal Inc. | Articles having improved resistance to thermal cracking |
| US8858870B2 (en) | 2008-08-22 | 2014-10-14 | Kennametal Inc. | Earth-boring bits and other parts including cemented carbide |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
| US9266171B2 (en) | 2009-07-14 | 2016-02-23 | Kennametal Inc. | Grinding roll including wear resistant working surface |
| WO2017057266A1 (en) * | 2015-09-29 | 2017-04-06 | 京セラ株式会社 | Bar stock and cutting tool |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| WO2017212702A1 (en) * | 2016-06-06 | 2017-12-14 | 住友電工ハードメタル株式会社 | Rod, drill bit body, rod manufacturing method, and drill manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929096A (en) * | 1982-08-09 | 1984-02-16 | Hitachi Plant Eng & Constr Co Ltd | Methane fermentation device |
| JPS6048207A (en) * | 1983-08-25 | 1985-03-15 | Mitsubishi Metal Corp | Ultra-hard drill and its manufacture |
-
1986
- 1986-03-19 JP JP6135886A patent/JPS62218010A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929096A (en) * | 1982-08-09 | 1984-02-16 | Hitachi Plant Eng & Constr Co Ltd | Methane fermentation device |
| JPS6048207A (en) * | 1983-08-25 | 1985-03-15 | Mitsubishi Metal Corp | Ultra-hard drill and its manufacture |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0297510U (en) * | 1989-01-24 | 1990-08-03 | ||
| US4971485A (en) * | 1989-01-26 | 1990-11-20 | Sumitomo Electric Industries, Ltd. | Cemented carbide drill |
| US5228812A (en) * | 1989-12-25 | 1993-07-20 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill |
| US5154549A (en) * | 1990-02-05 | 1992-10-13 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill bit |
| US5154550A (en) * | 1990-02-20 | 1992-10-13 | Sumitomo Electric Industries, Ltd. | Throw-away tipped drill bit |
| JPH03129434U (en) * | 1990-04-12 | 1991-12-26 | ||
| US5137398A (en) * | 1990-04-27 | 1992-08-11 | Sumitomo Electric Industries, Ltd. | Drill bit having a diamond-coated sintered body |
| US5022801A (en) * | 1990-07-18 | 1991-06-11 | The General Electric Company | CVD diamond coated twist drills |
| US6132148A (en) * | 1996-02-15 | 2000-10-17 | Habit Diamond Limited | Machining tool and method for forming same |
| US8272815B2 (en) * | 2005-10-03 | 2012-09-25 | Mitsubishi Materials Corporation | Boring tool and method of boring pilot hole |
| US20090136305A1 (en) * | 2005-10-03 | 2009-05-28 | Mitsubishi Materials Corporation | Boring tool and method of boring pilot hole |
| US8841005B2 (en) | 2006-10-25 | 2014-09-23 | Kennametal Inc. | Articles having improved resistance to thermal cracking |
| US8858870B2 (en) | 2008-08-22 | 2014-10-14 | Kennametal Inc. | Earth-boring bits and other parts including cemented carbide |
| US20100290849A1 (en) * | 2009-05-12 | 2010-11-18 | Tdy Industries, Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US8272816B2 (en) * | 2009-05-12 | 2012-09-25 | TDY Industries, LLC | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US20120282051A1 (en) * | 2009-05-12 | 2012-11-08 | TDY Industries, LLC | Composite Cemented Carbide Rotary Cutting Tools and Rotary Cutting Tool Blanks |
| US8876443B2 (en) | 2009-05-12 | 2014-11-04 | Kennametal Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US9435010B2 (en) | 2009-05-12 | 2016-09-06 | Kennametal Inc. | Composite cemented carbide rotary cutting tools and rotary cutting tool blanks |
| US9266171B2 (en) | 2009-07-14 | 2016-02-23 | Kennametal Inc. | Grinding roll including wear resistant working surface |
| US9643236B2 (en) | 2009-11-11 | 2017-05-09 | Landis Solutions Llc | Thread rolling die and method of making same |
| JP2011200935A (en) * | 2010-03-15 | 2011-10-13 | Ewag Ag | Laser machining apparatus and method for manufacture of rotationally symmetrical tool |
| US9016406B2 (en) | 2011-09-22 | 2015-04-28 | Kennametal Inc. | Cutting inserts for earth-boring bits |
| WO2017057266A1 (en) * | 2015-09-29 | 2017-04-06 | 京セラ株式会社 | Bar stock and cutting tool |
| CN108136514A (en) * | 2015-09-29 | 2018-06-08 | 京瓷株式会社 | Clava and cutting element |
| JPWO2017057266A1 (en) * | 2015-09-29 | 2018-07-12 | 京セラ株式会社 | Rod and cutting tool |
| CN108136514B (en) * | 2015-09-29 | 2019-08-09 | 京瓷株式会社 | Clava and cutting element |
| WO2017212702A1 (en) * | 2016-06-06 | 2017-12-14 | 住友電工ハードメタル株式会社 | Rod, drill bit body, rod manufacturing method, and drill manufacturing method |
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