JPH0529615U - Hard film coated drill for difficult-to-cut materials - Google Patents
Hard film coated drill for difficult-to-cut materialsInfo
- Publication number
- JPH0529615U JPH0529615U JP8708391U JP8708391U JPH0529615U JP H0529615 U JPH0529615 U JP H0529615U JP 8708391 U JP8708391 U JP 8708391U JP 8708391 U JP8708391 U JP 8708391U JP H0529615 U JPH0529615 U JP H0529615U
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- drill
- pair
- hard film
- side cutting
- chisel edge
- Prior art date
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Abstract
(57)【要約】
【目的】 シンニングによって形成される中心側切れ刃
のチッピングや刃欠けを防止する。
【構成】 シンニング加工によって形成される中心側切
れ刃２６，２８を直線状と成し、且つ、底面視において
両端部が外周側切れ刃２０，２２およびチゼルエッジ２
４にそれぞれ鈍角で接続されるようにするとともに、そ
の直角すくい角を負とする一方、その中心側切れ刃２
６，２８のすくい面を除いて逃げ面１６，１８等に硬質
膜を被覆する。
(57) [Abstract] [Purpose] To prevent chipping and chipping of the center side cutting edge formed by thinning. [Structure] The center side cutting edges 26, 28 formed by the thinning process are linear, and both end portions in the bottom view are outer peripheral side cutting edges 20, 22 and the chisel edge 2.
4 are connected to each other at an obtuse angle, and the right rake angle is made negative, while the cutting edge 2 on the center side
Hard surfaces are coated on the flanks 16 and 18 except for the rake faces 6 and 28.
Description
【０００１】[0001]
本考案は硬質膜被覆ドリルに係り、特に、ドリル直径に対するウェブ厚さの割 合が比較的大きい難削材用硬質膜被覆ドリルの改良に関するものである。 The present invention relates to a hard film coated drill, and more particularly to an improvement of a hard film coated drill for difficult-to-cut materials in which the ratio of web thickness to drill diameter is relatively large.
【０００２】[0002]
調質鋼などの難削性被削材を高能率に高速重切削するためのドリルは、高い剛 性を持たせるために構造上ウェブ厚さを大きくすることが望ましい。ウェブ厚さ を大きくすると、これに比例してチゼルエッジの長さが長くなるが、このチゼル エッジは２つの逃げ面の交線として形成されるため大きな負のすくい角となり、 著しく切れ味が悪い。このため、ウェブ先端にシンニング加工を施し、チゼルエ ッジの長さを短くするとともに、すくい角を強くすることが行われている。図３ は、上記シンニングの代表例で、（ａ）はＳ形シンニング、（ｂ）はＮ形シンニ ング、（ｃ）はＸ形シンニングである。かかる図３において、斜線で示されてい る５０および５２はシンニングが施されたシンニング面であり、５４および５６ は一対の切れ刃であり、５８および６０は逃げ面であり、６２はチゼルエッジで ある。 A drill for high-speed, heavy-duty cutting of hard-to-cut work materials such as heat-treated steel is desired to have a large web thickness in view of its structure in order to have high rigidity. When the web thickness is increased, the length of the chisel edge is increased in proportion to this, but since the chisel edge is formed as the intersection line of two flanks, the chisel edge has a large negative rake angle, which is extremely sharp. For this reason, the tip of the web is thinned to shorten the length of the chisel edge and to increase the rake angle. FIG. 3 is a typical example of the above-mentioned thinning, (a) is S-type thinning, (b) is N-type thinning, and (c) is X-type thinning. In FIG. 3, reference numerals 50 and 52, which are hatched, are thinned surfaces, 54 and 56 are a pair of cutting edges, 58 and 60 are flanks, and 62 is a chisel edge. ..
【０００３】 また、工具寿命を高めるために、ドリル本体の表面に硬質膜を被覆することが 一般に行われている。硬質膜は、例えば周期律表の４ａ，５ａ，６ａ族金属、Ｓ ｉまたはＡｌの炭化物、窒化物、酸化物、或いはそれ等の固溶体等から成り、単 層または多層に被覆されている。このような硬質膜を被覆すれば、耐溶着性が改 善されるとともに、優れた耐摩耗性が得られる。Further, in order to extend the life of the tool, it is common practice to coat the surface of the drill body with a hard film. The hard film is made of, for example, a metal of group 4a, 5a, 6a of the periodic table, a carbide of Si or Al, a nitride, an oxide, or a solid solution thereof, and is coated in a single layer or multiple layers. By coating with such a hard film, welding resistance is improved and excellent wear resistance is obtained.
【０００４】[0004]
しかしながら、ドリルの中心部は外周部に比べて切削速度が遅く、押し潰しに 近い切削を行うため、大きな切削抵抗を受け、前記従来のドリルにおいても、シ ンニングによって形成された切れ刃がチッピングや刃欠けなどを起こし易いとい う問題があった。特に、硬質膜を被覆したドリルは、優れた耐摩耗性を得られる 反面靱性が低下するため、上記問題が顕著となる。 However, the central part of the drill has a slower cutting speed than the outer peripheral part, and because it performs cutting close to crushing, it receives a large cutting resistance, and even in the conventional drill described above, the cutting edge formed by thinning causes chipping and chipping. There was a problem that it was easy to cause chipping. In particular, a drill coated with a hard film can obtain excellent wear resistance, but on the other hand, the toughness is deteriorated, so that the above problems become remarkable.
【０００５】 本考案は以上の事情を背景として為されたもので、その目的とするところは、 シンニングによって形成される切れ刃のチッピングや刃欠けを防止した難削材用 硬質膜被覆ドリルを提供することにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide a hard film-coated drill for difficult-to-cut materials that prevents chipping and chipping of a cutting edge formed by thinning. To do.
【０００６】[0006]
かかる目的を達成するために、本考案は、ドリル直径に対するウェブ厚さの割 合が比較的大きくなるように一対のねじれ溝が軸心に対して対称的に設けられた 難削材用硬質膜被覆ドリルであって、（ａ）ドリル先端部に形成された一対の逃 げ面と前記一対のねじれ溝とが交差する稜線にて構成された外周コーナから延び る一対の外周側切れ刃と、（ｂ）ウェブ先端に施されたシンニング加工により、 直線状を成すとともに底面視において両端部が前記外周側切れ刃およびチゼルエ ッジに鈍角で接続され、そのチゼルエッジの長さをドリル直径の１０％以下とし 、且つ、直角すくい角が負となるように形成された一対の中心側切れ刃と、（ｃ ）その一対の中心側切れ刃のすくい面を除くすくい面、逃げ面、マージン、およ びチゼルエッジの表面を被覆するように設けられた硬質膜とを有することを特徴 とする。 In order to achieve such an object, the present invention provides a hard film for difficult-to-cut materials in which a pair of twist grooves are provided symmetrically with respect to the axis so that the ratio of web thickness to drill diameter is relatively large. A coated drill, comprising: (a) a pair of outer peripheral side cutting edges extending from an outer peripheral corner formed by a ridge line where a pair of flanks formed at the drill tip and the pair of twist grooves intersect; (B) Due to the thinning process applied to the tip of the web, it is straight and both ends are connected to the outer cutting edge and the chisel edge at an obtuse angle in bottom view, and the length of the chisel edge is 10% of the drill diameter. And a pair of center side cutting edges formed so that the right angle rake angle is negative, and (c) a rake surface excluding the rake surface of the pair of center side cutting edges, a flank, a margin, and And chisel edge And having a hard film provided so as to cover the surface.
【０００７】[0007]
このような難削材用硬質膜被覆ドリルにおいては、ウェブ厚さを例えばドリル 直径の２５〜４０％程度と大きくすることで、切屑の排出に必要な溝深さを確保 しつつ大きな切削抵抗に耐えられる高剛性が得られる。また、シンニング加工に よりチゼルエッジの長さをドリル直径の１０％以下とすることで、切削抵抗が軽 減されるとともに切屑の排出性が改善される。１０％は性能が大きく変化する臨 界点である。シンニング加工によって形成される中心側切れ刃は直線状を成し、 底面視において両端部が外周側切れ刃およびチゼルエッジに鈍角で接続されてい るとともに、直角すくい角が負とされているため、それ等を鋭角で接続したり直 角すくい角を正としたりする場合に比較してチッピングや欠けが大幅に軽減され るのであり、また、切屑の流れが円滑となって耐溶着性が向上する。更に、中心 側切れ刃のすくい面を除くすくい面、逃げ面、マージン、およびチゼルエッジに 硬質膜が被覆されているため、比較的切削抵抗が大きくて欠損し易い中心側切れ 刃の靱性を損なうことなく、ドリルの耐溶着性，耐摩耗性を向上させることがで きる。 In such a hard film coated drill for difficult-to-cut materials, by increasing the web thickness to, for example, about 25 to 40% of the drill diameter, a large cutting resistance can be achieved while ensuring the groove depth necessary for chip discharge. High rigidity can be obtained. In addition, by reducing the length of the chisel edge to 10% or less of the drill diameter by thinning, cutting resistance is reduced and chip discharge is improved. 10% is the point where the performance changes greatly. The center side cutting edge formed by the thinning process has a straight line shape, and both ends are connected to the outer circumference side cutting edge and the chisel edge at an obtuse angle in bottom view, and the right angle rake angle is negative. Chipping and chipping are greatly reduced as compared with the case where the edges are connected at an acute angle or the square rake angle is made positive, and the flow of chips is smoothed to improve the welding resistance. Furthermore, since the hard film is coated on the rake face, flank, margin, and chisel edge of the center side cutting edge excluding the rake face, the toughness of the center side cutting edge, which has a relatively large cutting resistance and is easily damaged, is damaged. It is possible to improve the welding resistance and wear resistance of the drill.
【０００８】 このように、本考案の難削材用硬質膜被覆ドリルは、高剛性が得られるように ウェブ厚さが比較的大きいにも拘らず、チゼルエッジがドリル直径の１０％以下 とされて切削抵抗が軽減されるとともに、中心側切れ刃のチッピングや欠けを防 止しつつ耐溶着性，耐摩耗性が改善され、難削材に対する加工能率および加工精 度の飛躍的な向上を図ることができるのである。As described above, in the hard film-coated drill for difficult-to-cut materials of the present invention, the chisel edge is set to 10% or less of the drill diameter in spite of the relatively large web thickness so as to obtain high rigidity. Cutting resistance is reduced, and welding resistance and wear resistance are improved while preventing chipping and chipping of the cutting edge on the center side, aiming to dramatically improve machining efficiency and machining accuracy for difficult-to-cut materials. Can be done.
【０００９】[0009]
以下、本考案の一実施例を図面に基づいて詳細に説明する。 An embodiment of the present invention will be described below in detail with reference to the drawings.
【００１０】 図１は、本考案の一実施例である難削材用硬質膜被覆ドリル（以下、単にドリ ルという）１０を先端側から見た平面図で、図２は正面図である。かかるドリル １０のドリル本体には、軸心に対して対称的に一対のねじれ溝１２，１４が設け られているとともに、先端部には一対の逃げ面１６，１８が形成されており、そ れ等のねじれ溝１２，１４と逃げ面１６，１８とが交差する稜線により、外周コ ーナから延びる一対の外周側切れ刃２０，２２が構成されている。ねじれ溝１２ ，１４の溝深さは、ウェブ厚さがドリル直径Ｄの２５〜４０％程度となるように 定められている。ウェブ先端には、チゼルエッジ２４の長さがドリル直径Ｄの１ ０％以下となるようにシンニング加工が施され、そのチゼルエッジ２４と上記外 周側切れ刃２０，２２とを接続するように中心側切れ刃２６，２８が形成されて いる。中心側切れ刃２６，２８は、直角すくい角が負となるように形成されてい るとともに直線状を成しており、図１に示されている底面視において両端部が外 周側切れ刃２０，２２およびチゼルエッジ２４に鈍角で接続されている。図中斜 線で示されている部分３０，３２は、シンニング加工が行われたシンニング面で ある。また、上記一対の中心側切れ刃２６，２８のすくい面すなわちシンニング 面３０，３２のうち中心側切れ刃２６，２８の近傍部分、を除き、ねじれ溝１２ ，１４の一部で構成されている外周側切れ刃２０，２２のすくい面や、逃げ面１ ６，１８、マージン３４，３６、およびチゼルエッジ２４の表面には、ＴｉＣＮ 等の硬質膜が単層または多層で設けられている。FIG. 1 is a plan view of a hard film-coated drill for hard-to-cut materials (hereinafter, simply referred to as a drill) 10 according to an embodiment of the present invention as seen from the tip side, and FIG. 2 is a front view. The drill body of the drill 10 is provided with a pair of twist grooves 12 and 14 symmetrically with respect to the axis and a pair of flanks 16 and 18 at the tip end thereof. A pair of outer peripheral side cutting edges 20 and 22 extending from the outer peripheral corners are formed by the ridge lines where the twisted grooves 12 and 14 and the flanks 16 and 18 intersect. The groove depths of the spiral grooves 12 and 14 are set so that the web thickness is about 25 to 40% of the drill diameter D. The tip of the web is thinned so that the length of the chisel edge 24 is 10% or less of the drill diameter D, and the center side is connected so that the chisel edge 24 and the outer peripheral cutting edges 20 and 22 are connected. Cutting edges 26 and 28 are formed. The center side cutting edges 26, 28 are formed so that the right angle rake angle is negative and have a linear shape, and both end portions of the center side cutting edges 20 are the outer side cutting edges 20 in the bottom view shown in FIG. , 22 and the chisel edge 24 are connected at an obtuse angle. The portions 30 and 32 indicated by diagonal lines in the figure are thinning surfaces that have been subjected to thinning processing. Further, except for the rake faces of the pair of center side cutting edges 26, 28, that is, the thinning surfaces 30, 32 in the vicinity of the center side cutting edges 26, 28, they are formed by a part of the spiral grooves 12, 14. A hard film of TiCN or the like is provided in a single layer or a multilayer on the rake face of the outer peripheral side cutting edges 20, 22, the flank faces 16, 18, the margins 34, 36, and the surface of the chisel edge 24.
【００１１】 このようなドリル１０においては、ウェブ厚さがドリル直径Ｄの２５〜４０％ 程度と比較的大きいため、切屑の排出に必要な溝深さを確保しつつ大きな切削抵 抗に耐えられる高剛性が得られる。また、シンニング加工によりチゼルエッジ２ ４の長さがドリル直径Ｄの１０％以下とされているため、切削抵抗が軽減される とともに切屑の排出性が改善される。シンニング加工によって形成される中心側 切れ刃２６，２８は直線状を成し、底面視において両端部が外周側切れ刃２０， ２２およびチゼルエッジ２４にそれぞれ鈍角で接続されているとともに、直角す くい角が負とされているため、それ等を鋭角で接続したり直角すくい角を正とし たりする場合に比較してチッピングや欠けが大幅に軽減されるとともに、切屑の 流れが円滑となって耐溶着性が向上する。更に、中心側切れ刃２６，２８のすく い面を除くすくい面や逃げ面１６，１８、マージン３４，３６、およびチゼルエ ッジ２４の表面には硬質膜が被覆されているため、比較的切削抵抗が大きくて欠 損し易い中心側切れ刃２６，２８の靱性を損なうことなく、ドリル１０の耐溶着 性，耐摩耗性が向上する。In such a drill 10, since the web thickness is relatively large, which is about 25 to 40% of the drill diameter D, it is possible to withstand a large cutting resistance while ensuring a groove depth necessary for discharging chips. High rigidity can be obtained. Further, since the length of the chisel edge 24 is set to 10% or less of the drill diameter D by the thinning process, the cutting resistance is reduced and the chip discharging property is improved. The center side cutting edges 26, 28 formed by the thinning process have a straight line shape, and both ends are connected to the outer peripheral side cutting edges 20, 22 and the chisel edge 24 at an obtuse angle in a bottom view, and a right angle rake angle. Is negative, chipping and chipping are greatly reduced compared to when connecting them at an acute angle or setting the right angle rake angle to be positive, and the flow of chips is smooth and the welding resistance is high. The property is improved. Further, since the rake face other than the rake face of the center-side cutting edges 26, 28, the flank faces 16, 18, the margins 34, 36, and the surface of the chisel edge 24 are covered with a hard film, they are relatively cut. The welding resistance and wear resistance of the drill 10 are improved without impairing the toughness of the center side cutting edges 26, 28 which have a large resistance and are easily damaged.
【００１２】 このように、本実施例のドリル１０は、高剛性が得られるようにウェブ厚さが 比較的大きいにも拘らず、チゼルエッジ２４がドリル直径Ｄの１０％以下とされ て切削抵抗が軽減されるとともに、中心側切れ刃２６，２８のチッピングや欠け を防止しつつ耐溶着性，耐摩耗性が改善されるため、難削材に対する加工能率お よび加工精度の飛躍的な向上を図ることができる。As described above, in the drill 10 of the present embodiment, the chisel edge 24 is set to 10% or less of the drill diameter D and the cutting resistance is increased, though the web thickness is relatively large so that high rigidity can be obtained. The welding resistance and wear resistance are improved while preventing chipping and chipping of the center-side cutting edges 26, 28, which dramatically improves machining efficiency and machining accuracy for difficult-to-cut materials. be able to.
【００１３】 因に、表１に示す本考案品、比較品Ｉ，II、および従来品をそれぞれ２本ずつ 用意し、以下の切削条件で穴明け加工を行い、ドリル寿命に達するまでの加工穴 数を調べたところ、表２に示す結果が得られた。なお、硬質膜ＴｉＣＮの硬さは Ｈｖ（０．０２５）で２５２５〜２５４４であり、膜厚は０．００３２〜０．０ ０４８ｍｍである。By the way, the present invention product, the comparative products I and II, and the conventional product shown in Table 1 are prepared for each two, and the holes are drilled under the following cutting conditions to reach the drill life. When the number was examined, the results shown in Table 2 were obtained. The hardness of the hard film TiCN is 2525 to 2544 in Hv (0.025), and the film thickness is 0.0032 to 0.048 mm.
【００１４】[0014]
【表１】 [Table 1]
【００１５】 （切削条件） 被削材：ＳＫＤ６１（ＨＲＣ４１〜４２） 回転数：９００ｒｐｍ（２４ｍ／ｍｉｎ） 送り：０．２５ｍｍ／ｒｅｖ（２２５ｍｍ／ｍｉｎ） 切削長さ：２０ｍｍ通り穴 切削油：水溶性ソリブル油 機械：立型マシニングセンタ(Cutting Conditions) Work Material: SKD61 (HRC41 to 42) Rotation Speed: 900 rpm (24 m / min) Feed: 0.25 mm / rev (225 mm / min) Cutting Length: 20 mm Through Hole Cutting Oil: Water-soluble Soriburu Oil Machine: Vertical Machining Center
【００１６】 [0016]
【表２】 [Table 2]
【００１７】 かかる表２から明らかなように、本考案品はＸ形シンニングを施した従来品に 比較してドリル寿命が約２倍となる。また、硬質膜を被覆しない比較品IIはコー ナ摩耗が著しく、ドリル寿命が極めて短い一方、硬質膜を全面に被覆した比較品 Ｉは従来品よりも寿命が向上するが、中心側切れ刃の欠けにより本考案品程の寿 命向上効果は得られない。As is clear from Table 2, the product of the present invention has a drill life approximately twice as long as that of the conventional product having the X-shaped thinning. In addition, the comparative product II not coated with a hard film has significant corner wear and has a very short drill life, while the comparative product I coated with a hard film on the entire surface has a longer life than the conventional product, but the center side cutting edge Due to the chipping, the life-improving effect of this product cannot be obtained.
【００１８】 なお、上述したのはあくまでも本考案の一具体例であり、本考案は当業者の知 識に基づいて種々の変更，改良を加えた態様で実施することができる。The above description is merely one specific example of the present invention, and the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.
【図１】本考案の一実施例である難削材用硬質膜被覆ド
リルを先端側から見た平面図である。FIG. 1 is a plan view of a hard film-coated drill for hard-to-cut materials, which is an embodiment of the present invention, viewed from the tip side.
【図２】図１のドリルの正面図である。2 is a front view of the drill of FIG. 1. FIG.
【図３】従来のドリルにおけるシンニングの代表例を示
す平面図である。FIG. 3 is a plan view showing a typical example of thinning in a conventional drill.
１０：難削材用硬質膜被覆ドリル ２０，２２：外周側切れ刃 ２４：チゼルエッジ ２６，２８：中心側切れ刃 ３０，３２：シンニング面 10: Hard film coated drill for difficult-to-cut materials 20,22: Cutting edge on outer peripheral side 24: Chisel edge 26, 28: Cutting edge on central side 30, 32: Thinning surface
Claims (1)
比較的大きくなるように一対のねじれ溝が軸心に対して
対称的に設けられた難削材用硬質膜被覆ドリルであっ
て、 ドリル先端部に形成された一対の逃げ面と前記一対のね
じれ溝とが交差する稜線にて構成された外周コーナから
延びる一対の外周側切れ刃と、 ウェブ先端に施されたシンニング加工により、直線状を
成すとともに底面視において両端部が前記外周側切れ刃
およびチゼルエッジに鈍角で接続され、該チゼルエッジ
の長さをドリル直径の１０％以下とし、且つ、直角すく
い角が負となるように形成された一対の中心側切れ刃
と、 該一対の中心側切れ刃のすくい面を除くすくい面、逃げ
面、マージン、およびチゼルエッジの表面を被覆するよ
うに設けられた硬質膜とを有することを特徴とする難削
材用硬質膜被覆ドリル。1. A hard film-coated drill for difficult-to-cut materials, wherein a pair of twist grooves are provided symmetrically with respect to the axis so that the ratio of web thickness to drill diameter is relatively large. A pair of flanks formed on the part and a pair of outer peripheral side cutting edges extending from the outer peripheral corner formed by the ridge line intersecting the pair of twist grooves, and a thinning process applied to the tip of the web to form a straight line shape. A pair formed such that both ends thereof are connected to the outer peripheral side cutting edge and the chisel edge at an obtuse angle in a bottom view and the length of the chisel edge is 10% or less of the drill diameter and the right angle rake angle is negative. And a hard film provided so as to cover the rake face, the flank, the margin, and the chisel edge surface of the pair of center-side cutting edges. A hard film coated drill for difficult-to-cut materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8708391U JP2538864Y2 (en) | 1991-09-26 | 1991-09-26 | Hard film coated drill for difficult-to-cut materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8708391U JP2538864Y2 (en) | 1991-09-26 | 1991-09-26 | Hard film coated drill for difficult-to-cut materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0529615U true JPH0529615U (en) | 1993-04-20 |
| JP2538864Y2 JP2538864Y2 (en) | 1997-06-18 |
Family
ID=13905054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8708391U Expired - Lifetime JP2538864Y2 (en) | 1991-09-26 | 1991-09-26 | Hard film coated drill for difficult-to-cut materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538864Y2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007001011A (en) * | 2006-10-10 | 2007-01-11 | Mitsubishi Materials Corp | Drilling tool |
| WO2008050389A1 (en) * | 2006-10-23 | 2008-05-02 | Osg Corporation | Drill |
| US7740426B2 (en) | 2002-10-02 | 2010-06-22 | Osg Corporation | Deep-hole drill having back-tapered web |
| WO2016063893A1 (en) * | 2014-10-24 | 2016-04-28 | 京セラ株式会社 | Drill and method for manufacturing cut product using same |
| JP2019051581A (en) * | 2017-09-19 | 2019-04-04 | 株式会社タンガロイ | Coated drill |
| WO2021038841A1 (en) * | 2019-08-30 | 2021-03-04 | オーエスジー株式会社 | Drill |
-
1991
- 1991-09-26 JP JP8708391U patent/JP2538864Y2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7740426B2 (en) | 2002-10-02 | 2010-06-22 | Osg Corporation | Deep-hole drill having back-tapered web |
| JP2007001011A (en) * | 2006-10-10 | 2007-01-11 | Mitsubishi Materials Corp | Drilling tool |
| WO2008050389A1 (en) * | 2006-10-23 | 2008-05-02 | Osg Corporation | Drill |
| JPWO2008050389A1 (en) * | 2006-10-23 | 2010-02-25 | オーエスジー株式会社 | Drill |
| JP4699526B2 (en) * | 2006-10-23 | 2011-06-15 | オーエスジー株式会社 | Drill |
| JPWO2016063893A1 (en) * | 2014-10-24 | 2017-07-27 | 京セラ株式会社 | Drill and method of manufacturing cut product using the same |
| WO2016063893A1 (en) * | 2014-10-24 | 2016-04-28 | 京セラ株式会社 | Drill and method for manufacturing cut product using same |
| CN107073597A (en) * | 2014-10-24 | 2017-08-18 | 京瓷株式会社 | The manufacture method of the machining thing of drill bit and the use drill bit |
| US10357832B2 (en) | 2014-10-24 | 2019-07-23 | Kyocera Corporation | Drill and method for manufacturing machined product using same |
| CN107073597B (en) * | 2014-10-24 | 2019-11-01 | 京瓷株式会社 | The manufacturing method of drill bit and the machined object using the drill bit |
| JP2019051581A (en) * | 2017-09-19 | 2019-04-04 | 株式会社タンガロイ | Coated drill |
| WO2021038841A1 (en) * | 2019-08-30 | 2021-03-04 | オーエスジー株式会社 | Drill |
| US11865626B2 (en) | 2019-08-30 | 2024-01-09 | Osg Corporation | Drill |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2538864Y2 (en) | 1997-06-18 |
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