JP5769531B2 - Cutting tips and cutting tools - Google Patents

Cutting tips and cutting tools Download PDF

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JP5769531B2
JP5769531B2 JP2011161073A JP2011161073A JP5769531B2 JP 5769531 B2 JP5769531 B2 JP 5769531B2 JP 2011161073 A JP2011161073 A JP 2011161073A JP 2011161073 A JP2011161073 A JP 2011161073A JP 5769531 B2 JP5769531 B2 JP 5769531B2
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cutting
tip
brazed
cutting blade
chip
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篤史 國本
篤史 國本
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Kyocera Corp
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Description

本発明は、ホルダに取り付けて切削加工する切削チップおよび切削工具に関する。   The present invention relates to a cutting tip and a cutting tool that are attached to a holder for cutting.

ホルダに取り付けて切削加工する切削チップが広く用いられているが、複雑な形状の加工や精密加工に際しては、頂角が鋭角なＩＳＯ規格の切削チップ（例えば、頂角が３５°の上面視ひし形形状のＶタイプ等）が用いられている。しかしながら、急勾配のテーパ面の加工や複雑な倣い加工においては、チップが被削材に干渉して加工できないといった問題があった。そのため、頂角が２５°とさらに鋭利なチップが市販されているが、このような切刃が鋭利な切削チップは焼成によって変形が非常に大きくなりやすく、歩留まりが悪くなりやすいという問題がある。また、使用上においても、その頂角に対応したホルダを別途購入する必要があり、不経済であるという不具合があった。   Cutting tips that are attached to a holder for cutting are widely used. However, when processing complex shapes or precision machining, ISO-standard cutting tips with a sharp apex angle (for example, a top view rhombus with an apex angle of 35 °). V type etc.) are used. However, in the processing of a steep tapered surface or complicated copying, there is a problem that the chip cannot be processed due to interference with the work material. For this reason, a sharper tip having an apex angle of 25 ° is commercially available, but such a cutting tip having a sharp cutting edge has a problem that deformation tends to become very large by firing, and the yield tends to deteriorate. Also, in use, it is necessary to purchase a holder corresponding to the apex angle separately, which is uneconomical.

一方、特許文献１では、六角形の固定部と、この固定部から延在して形成された支持部と、該支持部にロウ付け等によって支持される加工用チップとを有し、固定部側面の開き角よりも支持部および加工用チップの開き角が小さい切削工具が開示されている。   On the other hand, Patent Document 1 has a hexagonal fixing portion, a support portion formed extending from the fixing portion, and a processing chip supported by brazing or the like on the support portion. A cutting tool is disclosed in which the opening angle of the support portion and the machining tip is smaller than the opening angle of the side surface.

特開２００７−０４４７８５号公報JP 2007-044785 A

しかしながら、特許文献１のように固定部に延在して支持部と加工用チップを形成した形状では、支持部の存在によって加工が複雑になるとともに加工用チップを複数設けることはできないという問題があった。   However, the shape in which the support portion and the processing tip are formed by extending to the fixed portion as in Patent Document 1 has a problem that the processing becomes complicated due to the presence of the support portion and a plurality of processing tips cannot be provided. there were.

本発明は、倣い加工等の複雑な形状の加工が可能であるとともに、歩留まり良く安定した製造ができ、かつ汎用のホルダが使用可能な切削チップおよび切削工具を提供することにある。   An object of the present invention is to provide a cutting tip and a cutting tool that can be processed in a complicated shape such as copying, can be stably manufactured with a high yield, and can use a general-purpose holder.

本発明の切削チップは、上面視で頂角が５５°以下の略ひし形をなす板状であり、ＩＳＯ規格に準拠した形状のチップ本体と、該チップ本体の複数の角部それぞれにロウ付けされる切刃部とを有するとともに、前記チップ本体の前記切刃部がロウ付けされる角部の頂角よりも、前記切刃部の頂角が鋭角となるように前記切刃部の先端が前記チップ本体から突出している。   The cutting tip of the present invention has a plate shape having a substantially rhombus shape with an apex angle of 55 ° or less when viewed from above, and is brazed to a chip body conforming to the ISO standard and a plurality of corners of the chip body. And the tip of the cutting edge is so that the apex angle of the cutting edge is more acute than the apex angle of the corner where the cutting edge of the chip body is brazed. Projecting from the chip body.

本発明の切削チップは、切刃部の頂角が鋭角なので倣い加工等の複雑な形状の加工が可能であるとともに、チップ本体は先端がさほど鋭角でないので焼成によって変形しにくく、歩留まり良く安定した製造ができる。また、チップ本体はＩＳＯ規格に準拠した形状からなるので、汎用のホルダが使用可能で経済的である。   The cutting tip according to the present invention has a sharp apex angle at the cutting edge so that it can be processed in a complicated shape such as copying, and since the tip body is not so acute, the tip is not easily deformed by firing, and the yield is stable. Can be manufactured. Moreover, since the chip body has a shape conforming to the ISO standard, a general-purpose holder can be used and it is economical.

本発明の切削チップの一例を示し、（ａ）斜視図、（ｂ）切刃部を除いてチップ本体を上面から見た投影図、（ｃ）切刃部をチップ本体にロウ付けした状態で上面から見た投影図、（ｄ）側面図である。An example of the cutting tip of the present invention is shown, (a) a perspective view, (b) a projection view of the tip body viewed from the top surface excluding the cutting edge portion, and (c) a state where the cutting blade portion is brazed to the tip body. It is the projection figure seen from the upper surface, (d) It is a side view. 本発明の切削チップの変形例を示し、（ｅ）切刃部が４つ形成された形態の側面図、（ｆ）切刃部の先端がチップ本体の角部に対して斜めに配置された形態を上面から見た投影図である。The modification of the cutting tip of this invention is shown, (e) The side view of the form with which four cutting blade parts were formed, (f) The front-end | tip of the cutting blade part was arrange | positioned diagonally with respect to the corner | angular part of a chip | tip main body. It is the projection figure which looked at the form from the upper surface. 図１の切削チップをホルダに装着した切削工具の一例について、（ａ）上面視図、（ｂ）側面図である。It is (a) top view and (b) side view about an example of the cutting tool which mounted | worn the cutting tip of FIG. 1 to the holder.

以下、図１を用いて、本発明の一実施態様である切削チップ（以下、チップと称す。）１について説明する。図１は本発明の切削チップの実施態様例についての（ａ）斜視図、（ｂ）切刃部を除いてチップ本体を上面から見た投影図、（ｃ）切刃部をチップ本体にロウ付けした状態で上面から見た投影図、（ｄ）側面図である。   Hereinafter, a cutting tip (hereinafter referred to as a tip) 1 which is an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a perspective view of an embodiment of a cutting tip according to the present invention, FIG. 1B is a projected view of the tip body viewed from the top surface excluding the cutting edge portion, and FIG. It is the projection figure seen from the upper surface in the attached state, (d) It is a side view.

図１のチップ１は、上面視で頂角が５５°以下の略ひし形をなす板状からなるＩＳＯ規格に準拠した形状のチップ本体２と、チップ本体２の複数の角部それぞれにロウ付けされる切刃部３とを有している。ここで、チップ本体２は、ＩＳＯ規格のＤ、Ｖで表わされる主面がひし形形状の板状をなし、頂角はそれぞれ５５°、３５°である。中でも、切刃部３のロウ付け面積が広くできるＶ型であることが望ましい。なお、図１（ｄ）によれば、切刃部３はチップ本体２の上面の２つのコーナーにロウ付けされているが、本発明はこれに限定されるものではなく、図２（ｅ）の切刃部が４つ形成された形態の側面図のように、チップ本体２の下面側にもロウ付けされて４つの切刃部３’を有するものであってもよい。   The chip 1 in FIG. 1 is brazed to a chip body 2 having a shape conforming to the ISO standard, which is a plate having a substantially rhombus shape with an apex angle of 55 ° or less when viewed from above, and a plurality of corners of the chip body 2. And a cutting blade portion 3. Here, the chip body 2 has a plate shape whose main surface represented by D and V of the ISO standard has a rhombus shape, and the apex angles are 55 ° and 35 °, respectively. Especially, it is desirable that it is V type which can make the brazing area of the cutting blade part 3 wide. In addition, according to FIG.1 (d), although the cutting blade part 3 is brazed to two corners of the upper surface of the chip | tip main body 2, this invention is not limited to this, FIG.2 (e) As shown in a side view of a form in which four cutting blade portions are formed, the chip body 2 may be brazed to the lower surface side of the chip body 2 to have four cutting blade portions 3 ′.

ここで、図１（ｂ）（ｃ）によれば、チップ本体２の切刃部３がロウ付けされる角部４の頂角θ１よりも、切刃部３の頂角θ２が鋭角（θ１＞θ2）となるように切刃部３の先
端５がチップ本体２から突出している。この構成によって、倣い加工等の複雑な形状の加工が可能であるとともに、切削チップ１は先端がさほど鋭角でないので焼成によって変形しにくくて歩留まり良く安定した製造ができる。また、チップ本体２はＩＳＯ規格に準拠した形状からなるので、図３の切削チップ１をホルダに装着した切削工具の一例に示すように、汎用のホルダ１０が使用可能で経済的である。 Here, according to FIG. 1 (b) (c), than the apex angle theta 1 of the corner 4 of the cutting edge portion 3 of the tip body 2 is brazed, the apex angle theta 2 of the cutting edge 3 is an acute angle The tip 5 of the cutting edge portion 3 protrudes from the chip body 2 so that (θ 1 > θ 2 ). With this configuration, it is possible to process complicated shapes such as profiling, and the cutting tip 1 is not so acute, so that it is difficult to be deformed by firing and can be stably manufactured with high yield. Since the chip body 2 has a shape conforming to the ISO standard, a general-purpose holder 10 can be used and is economical as shown in an example of a cutting tool in which the cutting chip 1 of FIG.

また、チップ本体２の頂角θ１が５５°以下の角部４に第１のノーズＲ（曲率半径：ｒ１）が形成されているとともに、切刃部３には第１のノーズＲ（曲率半径：ｒ１）よりも大きい第２のノーズＲ（曲率半径：ｒ２）（ｒ１＜ｒ２）が形成されている。これによって、チップ本体２の角部４を切刃部３の先端５にできるだけ近づけることができ、ロウ付けされる切刃部３のロウ付け強度が高くなる。 In addition, a first nose R (curvature radius: r 1 ) is formed in the corner 4 where the apex angle θ 1 of the chip body 2 is 55 ° or less, and the first nose R ( A second nose R (curvature radius: r 2 ) (r 1 <r 2 ) larger than the radius of curvature: r 1 is formed. Thereby, the corner | angular part 4 of the chip | tip main body 2 can be brought as close as possible to the front-end | tip 5 of the cutting blade part 3, and the brazing strength of the braided cutting blade part 3 becomes high.

さらに、切刃部３の側面は、チップ本体２にロウ付けされる拘束面３ａ以外が焼成後研磨しない焼き肌面からなることが、製造コストを抑えることができる点で望ましい。   Furthermore, it is desirable that the side surface of the cutting edge portion 3 is formed of a burnt surface that is not polished after firing except for the restraining surface 3a brazed to the chip body 2 in terms of manufacturing cost.

また、チップ本体２は切刃部３よりも低硬度の素材からなることが、製造コストを抑えることができるとともに、チップ本体２を容易に複雑な形状の加工ができる点で望ましい。なお、チップ本体２は鋼または合金鋼等の金属にて構成され、切刃部３は超硬合金やサーメット等の硬質合金にて構成されることが、性能とコストの両立の関係で望ましい。硬質焼結体としては、超硬合金、サーメット、セラミックス、ダイヤモンドおよびｃＢＮが好適に適用可能であり、金属または合金鋼としては、高速度鋼や焼入鋼も好適に適用可能である。一方、ロウ付け用合金は、Ｔｉ−ＣｕやＴｉ−Ｃｕ−Ａｇ系合金であると接合強度を高めることができる。特に、活性金属であるＴｉを含有する活性ロウ付け用合金を用いた場合には高い接合強度でロウ付けできる。   Further, it is desirable that the chip body 2 is made of a material having a hardness lower than that of the cutting edge portion 3 in that the manufacturing cost can be suppressed and the chip body 2 can be easily processed into a complicated shape. The chip body 2 is preferably made of a metal such as steel or alloy steel, and the cutting edge portion 3 is preferably made of a hard alloy such as cemented carbide or cermet in terms of both performance and cost. As the hard sintered body, cemented carbide, cermet, ceramics, diamond and cBN are preferably applicable, and as the metal or alloy steel, high speed steel and hardened steel are also suitably applicable. On the other hand, when the brazing alloy is Ti—Cu or Ti—Cu—Ag alloy, the bonding strength can be increased. In particular, when an active brazing alloy containing Ti as an active metal is used, brazing can be performed with high bonding strength.

さらに、図２（ｆ）の切刃部の先端がチップ本体の角部に対して斜めに配置された形態を上面から見た投影図に示すように、切削チップ１’はチップ本体２の角部に対して切刃部３が斜めにロウ付けされたものであってもよい。この形態によればより複雑な形状に切削加工することができる。   Further, the cutting tip 1 ′ is a corner of the tip body 2 as shown in the projection view of the top end of the cutting edge portion of FIG. 2 (f) arranged obliquely with respect to the corner portion of the tip body. The cutting blade part 3 may be brazed obliquely with respect to the part. According to this form, it can cut into a more complicated shape.

１ チップ
２ チップ本体
３ 切刃部
３ａ 側面の拘束面
４ 角部
θ１ チップ本体の角部の頂角
θ２ 切刃部の頂角
５ 先端
１０ ホルダ DESCRIPTION OF SYMBOLS 1 Tip 2 Tip main body 3 Cutting blade part 3a Side restraint surface 4 Corner | angular part (theta) 1 Apex angle of the corner | angular part of 1 chip | tip main body 2 Apex angle 5 of a cutting blade part Tip 10 Holder

Claims (5)

上面視で頂角が５５°以下のひし形をなす板状でありＩＳＯ規格に準拠した形状のチップ本体と、該チップ本体の前記頂角が５５°以下の複数の角部それぞれにロウ付けされる切刃部とを有するとともに、前記チップ本体の前記切刃部がロウ付けされる角部の頂角よりも、前記切刃部の頂角が鋭角となるように前記切刃部の先端が前記チップ本体から突出している切削チップ。 The shape of the chip body which apex angles conforming to the plate der Ri I SO standards forming a 55 ° or less Nohi to form in top view, a plurality of corner portions each of said top angle is 55 ° more than the tip body The cutting blade portion to be brazed, and the cutting blade portion so that the vertex angle of the cutting blade portion is an acute angle than the vertex angle of the corner portion to which the cutting blade portion of the chip body is brazed. A cutting tip whose tip protrudes from the tip body. 前記チップ本体の前記頂角が５５°以下の角部に第１のノーズＲが形成されているとともに、前記切刃部には前記第１のノーズＲの曲率半径よりも大きい曲率半径を有する第２のノーズＲが形成されている請求項１記載の切削チップ。   A first nose R is formed at a corner of the tip body having an apex angle of 55 ° or less, and the cutting edge has a radius of curvature larger than the radius of curvature of the first nose R. The cutting tip according to claim 1, wherein two noses R are formed. 前記切刃部の側面は、前記チップ本体にロウ付けされる拘束面以外が焼き肌面からなる請求項１または２記載の切削チップ。   3. The cutting tip according to claim 1, wherein a side surface of the cutting edge portion is a burnt surface other than a restraining surface brazed to the tip body. 前記チップ本体は前記切刃部よりも低硬度の素材からなる請求項１乃至３のいずれか記載の切削チップ。   The cutting tip according to any one of claims 1 to 3, wherein the tip body is made of a material having a hardness lower than that of the cutting edge portion. 請求項１乃至４のいずれか記載の切削チップをホルダに装着した切削工具。   A cutting tool in which the cutting tip according to claim 1 is mounted on a holder.
JP2011161073A 2011-07-22 2011-07-22 Cutting tips and cutting tools Active JP5769531B2 (en)

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JP3697893B2 (en) * 1998-05-14 2005-09-21 住友電気工業株式会社 Hard sintered body throw-away tip and manufacturing method thereof
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JP4585243B2 (en) * 2004-06-30 2010-11-24 株式会社アライドマテリアル Single crystal diamond cutting tool for ultra-precision machining
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CN101489705A (en) * 2006-07-21 2009-07-22 柯尼卡美能达精密光学株式会社 Cutting oscillator, oscillating cutting unit, machining apparatus, shaping mold and optical device
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