JPH08197339A - Manufacture of shaft-shape cutting tool material - Google Patents
Manufacture of shaft-shape cutting tool materialInfo
- Publication number
- JPH08197339A JPH08197339A JP3893795A JP3893795A JPH08197339A JP H08197339 A JPH08197339 A JP H08197339A JP 3893795 A JP3893795 A JP 3893795A JP 3893795 A JP3893795 A JP 3893795A JP H08197339 A JPH08197339 A JP H08197339A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- cutting tool
- shaft
- base
- tool material
- 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
Landscapes
- Milling Processes (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】 本発明は、主として長手周面に
超砥粒焼結体からなる切刃部を配置した、ツイストドリ
ル、エンドミル、リーマ等の、軸状切削工具素材の製法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a shaft-shaped cutting tool material such as a twist drill, an end mill, and a reamer, in which a cutting edge portion made of a super-abrasive-sintered body is mainly arranged on a longitudinal peripheral surface.
【０００２】[0002]
【従来の技術】 従来これらの工具は高速度鋼製や超硬
合金製のものが用いられてきたが、加工速度、加工精
度、そして工具寿命の向上を計るために、切刃部に超砥
粒焼結体を用いることが提案されている。例えば特開平
３−２７７４１２においては、ねじれ凹溝を有する母材
焼結体と、このねじれ凹溝に充填・埋設され、母材焼結
体に焼結によって固着された超砥粒焼結体とを備えた切
削工具が示されている。そしてこの工具の作製方法とし
て、仮焼結された母材焼結体の外側面にらせん状に設け
たねじれ凹溝中に、ダイヤモンド、立方晶窒化ホウ素
（ｃＢＮ）等の焼結すべき原料粉末と、適当な焼結助剤
との混合物を充填し、高圧・高温条件下で焼結する実施
例が示されている。2. Description of the Related Art Conventionally, these tools have been made of high-speed steel or cemented carbide, but in order to improve processing speed, processing accuracy, and tool life, the cutting edge is It has been proposed to use a granular sintered body. For example, in Japanese Unexamined Patent Publication (Kokai) No. 3-27712, a base material sintered body having a twisted groove and a superabrasive grain sintered body filled and embedded in the twisted groove and fixed to the base material sintered body by sintering are described. A cutting tool with is shown. Then, as a method for producing this tool, raw material powder such as diamond or cubic boron nitride (cBN) to be sintered is provided in a spiral groove formed in a spiral shape on the outer surface of the pre-sintered base material sintered body. And a mixture with a suitable sintering aid are filled and the mixture is sintered under high pressure and high temperature conditions.
【０００３】上記実施例において、工具の作製に用いら
れる母材としては、仮焼結されたあるいは実質的に無気
孔の焼結品が記載されている。仮焼結材を使用する場
合、母材および焼結原料の均等な収縮を確保するために
は、全体を超高圧高温条件下に供する本焼結工程を、完
全な静水圧条件下で実施することが必要になる。しかし
操作性および経済性に優れ、工業的に広く用いられてい
る一軸加圧装置の反応室内に、このような条件を実現す
るのはかなり困難である。In the above-mentioned examples, a pre-sintered or substantially non-porous sintered product is described as the base material used for producing the tool. When using a pre-sintered material, in order to ensure uniform shrinkage of the base material and the sintering raw material, the main sintering step in which the whole is subjected to ultra-high pressure and high temperature conditions is performed under complete hydrostatic pressure conditions. Will be needed. However, it is quite difficult to realize such conditions in the reaction chamber of the uniaxial pressurizer which is excellent in operability and economical efficiency and widely used in the industry.
【０００４】一方、母材焼結体として実質的に無気孔の
焼結品を用いた場合には、母材の変形は避けることがで
きるが、母材焼結体の外周面にらせん（螺旋）状に設け
られた狭いねじれ凹溝中に、超砥粒を均一に充填するこ
とは困難である。この結果、充填の不均一性により焼結
超砥粒層表面に凹凸が生じ、これを修正するために、後
工程の研削加工仕上げに多くの時間を要することにな
る。On the other hand, when a substantially non-porous sintered product is used as the base material sintered body, deformation of the base material can be avoided, but a spiral (spiral) is formed on the outer peripheral surface of the base material sintered body. It is difficult to uniformly fill the superabrasive grains in the narrow twist groove formed in the shape of (). As a result, unevenness of the filling causes unevenness on the surface of the sintered superabrasive grain layer, and in order to correct this, a lot of time is required for finishing the grinding process in the subsequent step.
【０００５】特開平１−９６３０７には、中空円筒状の
台金部材の外周側面に設けたねじれ凹溝中に、超砥粒原
料を充填し、高圧・高温条件下で焼結を行った後、得ら
れた複合焼結体から、ねじれ溝に沿って台金付きの刃を
切り出し、工具基体にろう付けする技術が提案されてい
る。また特開平１−９２３０２には、中空円筒状の台金
部材の外周面に、超砥粒焼結体が固着された複合焼結体
を、高圧・高温条件下で作製した後、ねじれ刃の形状に
切り出し、工具基体にろう付けする方法が示されてい
る。これらは工具基体材料の選択幅が広い利点がある
が、刃と基体との接着強度は、同時焼結で作製した工具
には及ばず、またろう付けに利用できる狭い温度範囲か
ら外れると焼結超砥粒層の剥がれが生じるので、厳密な
温度管理を要する。In Japanese Patent Application Laid-Open No. 1-96307, a superabrasive grain raw material is filled in a twist groove formed on the outer peripheral side surface of a hollow cylindrical base metal member, and after sintering under high pressure and high temperature conditions. A technique has been proposed in which a blade with a base metal is cut out from the obtained composite sintered body along a twist groove and brazed to a tool base. Further, in Japanese Patent Application Laid-Open No. 1-92302, a composite sintered body in which a superabrasive sintered body is fixed to the outer peripheral surface of a hollow cylindrical base metal member is produced under high pressure and high temperature conditions, A method of cutting into shape and brazing to a tool substrate is shown. These have the advantage of wide selection of tool base materials, but the adhesive strength between the blade and the base does not reach that of tools produced by co-sintering, and when the temperature is out of the narrow temperature range available for brazing, sintering Strict temperature control is required because the superabrasive layer peels off.
【０００６】一方特開平３−２３９４１１には、平板状
の超砥粒焼結体から、ねじれ刃形状のチップを切り出
し、工具基体にろう付けする方法が記載されているが、
上記と同様に、接着強度の不足、焼結超砥粒層の劣化と
いう欠点を伴う。On the other hand, Japanese Patent Laid-Open No. 3-239411 discloses a method of cutting out a twisted blade-shaped tip from a flat plate-shaped superabrasive grain sintered body and brazing it to a tool base.
Similar to the above, there are drawbacks such as insufficient adhesive strength and deterioration of the sintered superabrasive layer.
【０００７】ドリルなどの孔明け工具において、刃先を
焼結したダイヤモンド等の超砥粒で形成するには、軸状
素材の刃先相当部の周面に溝を設け、超砥粒を充填する
ことが必要になるが、一般に細長くしかも幅の狭いこれ
らの刃先を形成するためには、例えば幅、深さが共に２
ｍｍ以下で、長さが２５ｍｍを超えるような溝が必要に
なる。In a drilling tool such as a drill, in order to form the cutting edge with superabrasive grains such as sintered diamond, a groove is formed on the peripheral surface of the shaft-shaped material corresponding to the cutting edge and the superabrasive grains are filled. However, in order to form these elongated and narrow cutting edges, for example, both width and depth are 2
Grooves having a length of less than mm and a length of more than 25 mm are required.
【０００８】上記のような細長いらせん溝に、緻密かつ
均一に超砥粒粉末を充填することは、特に乾式手法で
は、砥粒間における摩擦が大きい故に、不可能に近い。
これに代わる方法として、超砥粒粉末をワックスで練っ
た状態、または適当な溶媒と共に流し込む方法が知られ
ている。この手法を用いると、より高い充填密度および
均一性が達成できるが、反面これらの方法においては、
焼結操作に先立って、ワックスや溶媒を除去する工程が
必要であった。It is almost impossible to densely and uniformly fill the above-described elongated spiral groove with superabrasive grain powder, especially in the dry method, because the friction between the abrasive grains is large.
As an alternative method, a method in which superabrasive grain powder is kneaded with a wax or poured with a suitable solvent is known. Higher packing densities and uniformity can be achieved with this approach, but with these methods,
Prior to the sintering operation, a step of removing wax and solvent was required.
【０００９】[0009]
【発明が解決しようとする課題】 したがって本発明の
主な目的は、上記の軸状切削工具素材の製造において、
特に溝中への超砥粒の均一な充填を確実かつ容易化する
ことにより、形状修正のための研削加工等の後工程を省
略可能にした製造方法を提供することにある。Therefore, the main object of the present invention is to manufacture the above-mentioned material for a shaft-shaped cutting tool,
In particular, it is an object of the present invention to provide a manufacturing method capable of omitting a post-process such as a grinding process for shape correction by surely and easily filling a groove with superabrasive grains uniformly.
【００１０】[0010]
【課題を解決するための手段】 本発明の要旨は次の方
法に存する：（１）本質的に円筒状を呈する超硬合金製
基体の周面に、軸方向に延在しかつ基体端部に達する１
乃至複数本の線状溝を設け、（２）高融点金属材を基体
周面に密着配置してこれらの溝を覆い、（３）上記溝の
端部から超砥粒粉末を充填し、（４）上記円筒の少なく
とも一つの端面に接して、Ｃｏおよび／またはＮｉを主
成分とし、かつＣの共存下において基体の超硬合金の軟
化温度よりも実質的に低い共晶温度を呈する組成の溶融
金属供給源を置き、（５）上記溝の両端を高融点金属材
で密封し、（６）全体を超砥粒が熱力学的に安定な圧力
温度条件下で加熱し、これによって上記溶融金属供給源
を流動化させ超砥粒粉末間を流通させることにより、超
砥粒を一体化すると同時に全体を超硬合金製基体へ接合
することを特徴とする、軸状切削工具素材の製法。The gist of the present invention resides in the following method: (1) A peripheral edge of a cemented carbide substrate having an essentially cylindrical shape, which extends in the axial direction and has an end portion of the substrate. Reaching 1
Or, a plurality of linear grooves are provided, (2) a refractory metal material is closely arranged on the peripheral surface of the substrate to cover these grooves, (3) superabrasive powder is filled from the ends of the grooves, ( 4) A composition that is in contact with at least one end face of the cylinder and has Co and / or Ni as a main component and that exhibits a eutectic temperature that is substantially lower than the softening temperature of the cemented carbide of the substrate in the coexistence of C. A molten metal supply source is placed, (5) both ends of the groove are sealed with a high melting point metal material, and (6) the entire superabrasive is heated under thermodynamically stable pressure temperature conditions, whereby the melting is performed. A method for manufacturing a shaft-shaped cutting tool material, characterized by fluidizing a metal supply source and circulating it between super-abrasive grain powders to integrate the super-abrasive grains and at the same time to bond the whole to a cemented carbide substrate.
【００１１】本発明において、上記の高融点金属材は、
例えばＴａ、Ｚｒ、Ｍｏの薄板を基体周面に密着して巻
き付け、あるいは薄肉の管として基体周面に嵌め合わせ
て用いる。In the present invention, the refractory metal material is
For example, a thin plate of Ta, Zr, or Mo is closely wound around the peripheral surface of the base body, or a thin tube is fitted to the peripheral surface of the base body.
【００１２】流動化して超砥粒間を流通させる上記溶融
金属供給源としては、Ｃｏ、Ｎｉを主成分とする各種組
成の共晶合金、例えばＣｏ系についてはＷ−Ｃｏ−Ｃ系
の共晶合金を挙げることができる。これは、Ｃｏを単体
金属の粉末とし用い、基体のＷＣおよびダイヤモンド粒
子の一部との反応により、融液として形成することがで
きるが、ダイヤモンドの消費量を少なくする見地から
は、Ｃｏ単体金属の粉末を３〜５％のＣ粉末と混合し、
成型したペレットとして用いるのが、より好ましい。さ
らにはＷＣ粉末とＣｏ粉末とを、ＷＣ−Ｃｏ−Ｃの共晶
組成に近い配合比にて混合し、成型したペレットとして
使用するのも有効な手段である。混合物・合金組成の選
択基準としては、ダイヤモンド合成反応における溶媒金
属のようにＣに対する溶解特性および、炭素の共存下に
おける融点が、特に考慮される。As the above-mentioned molten metal supply source which is fluidized and circulated between the superabrasive grains, a eutectic alloy of various compositions containing Co and Ni as main components, for example, a Co-based W-Co-C eutectic alloy. Mention may be made of alloys. This can be formed as a melt by using Co as a powder of a single metal and reacting with WC of the substrate and a part of the diamond particles, but from the viewpoint of reducing the consumption of diamond, a single metal of Co is used. Powder with 3-5% C powder,
It is more preferable to use it as a molded pellet. Furthermore, it is also an effective means to mix WC powder and Co powder at a compounding ratio close to the eutectic composition of WC-Co-C and use them as molded pellets. As selection criteria for the mixture / alloy composition, the solubility characteristics for C such as the solvent metal in the diamond synthesis reaction and the melting point in the coexistence of carbon are particularly considered.
【００１３】上記の溶融金属供給源は、上で述べたよう
に混合粉末の成型物として、あるいは焼結または溶融調
製したブロックとして、基体の端面に隣接配置すること
ができる。前者の方法は操作が簡単であるが、低融点相
およびこれに続く液相の形成に多少時間を要し、このた
め工程時間が長くなる。一方後者の方法は、かゝる材料
の調製に手間を要するが、充填操作は容易化され、また
基体との焼結・一体化段階において液相の形成が効率的
に進行する。The above-mentioned molten metal supply source can be disposed adjacent to the end face of the substrate as a mixed powder molding as described above, or as a block prepared by sintering or melting. The former method is simple to operate, but it takes some time to form the low melting point phase and the subsequent liquid phase, which lengthens the process time. On the other hand, in the latter method, preparation of such a material requires time and labor, but the filling operation is facilitated, and the formation of the liquid phase proceeds efficiently in the stage of sintering and integration with the substrate.
【００１４】一方、Ｎｉを主成分とする系では、上記の
Ｃｏの場合と同様に、Ｎｉ−Ｃ系の混合粉末も利用でき
るが、Ｎｉと、Ｃｒ２０％、Ｃ３．５％との三元混合粉
末から成る成型品が、より望ましい。また予め配合され
たＣｏ−Ｍｎ系の１：１、Ｎｉ−Ｍｎ系の１：１混合粉
末も、同様に使用可能である。On the other hand, in the system containing Ni as a main component, as in the case of Co described above, a mixed powder of Ni-C system can be used, but a ternary mixture of Ni, Cr 20% and C 3.5% is used. Molded articles made of powder are more desirable. In addition, pre-blended 1: 1 mixed powder of Co—Mn system and 1: 1 mixed powder of Ni—Mn system can be similarly used.
【００１５】超砥粒を充填する溝は、円筒状の基体表面
にらせん状または傾斜線状に構成し、基体端面には、こ
の溝に連結して半径方向の溝を設けて、刃を形成するこ
とができる。The groove for filling the superabrasive grains is formed in a spiral shape or a slanted line shape on the surface of the cylindrical substrate, and a radial groove is formed on the end surface of the substrate in connection with this groove to form a blade. can do.
【００１６】このような超砥粒としては、合成または天
然ダイヤモンドや、ｃＢＮ、ｗＢＮのような高圧相窒化
ホウ素が使用可能である。As such superabrasive grains, synthetic or natural diamond and high pressure phase boron nitride such as cBN and wBN can be used.
【００１７】超砥粒としてダイヤモンドを用いる場合、
ダイヤモンド粉末にＣｏまたはＮｉを粉末の形で混合、
またはメッキ、蒸着などの方法を用いて被覆すること
は、焼結性の改善に有効である。When diamond is used as the superabrasive grain,
Diamond powder mixed with Co or Ni in powder form,
Alternatively, coating using a method such as plating or vapor deposition is effective in improving the sinterability.
【００１８】本発明においては、基体の端部に配置した
Ｃｏおよび／またはＮｉ含有合金粉末の成型品が、焼結
条件の高温度下において軟化、あるいは融解しＣｏまた
はＮｉを主体とする共晶組成の液相（例えばＣｏ−Ｗ−
Ｃ系融液、Ｎｉ−Ｃｒ−Ｃ融液）を形成する。これらの
軟化または融解金属相は、重力および端面上方からの加
圧力により、基体表面の細溝内に流入して、充填されて
いる超砥粒を押し下げ、さらに毛細管現象により超砥粒
粒間へと浸透・流下する。この際、溝内の超砥粒粒子の
分布が均一化され、また緻密化される。In the present invention, the molded product of the Co and / or Ni-containing alloy powder arranged at the end of the base body is softened or melted under the high temperature of the sintering condition and is eutectic mainly composed of Co or Ni. The liquid phase of the composition (eg Co-W-
C-based melt, Ni-Cr-C melt) is formed. These softened or molten metal phases flow into the fine grooves on the surface of the substrate due to gravity and pressure from above the end faces, push down the filled superabrasive grains, and further move between the superabrasive grains by capillary action. Permeates and flows down. At this time, the distribution of superabrasive grains in the grooves is made uniform and densified.
【００１９】このように本発明においては、流動化した
金属相の作用により、細溝内に充填されている超砥粒の
分布が均一化され、かつ緻密化される。このため、焼結
条件下において、側方からの圧力によって、細溝内の超
砥粒の一部が窪み、超砥粒層の厚さに不足部分の発生す
る事態が防止される。なお端面部に入り込んだこれらの
金属相は、仕上げ加工の際に超硬合金と共に研削除去す
る。As described above, in the present invention, the action of the fluidized metal phase makes the distribution of the superabrasive grains filled in the fine grooves uniform and densified. Therefore, under the sintering conditions, it is possible to prevent a situation in which a part of the superabrasive grains in the fine groove is dented due to the pressure from the side and the thickness of the superabrasive grain layer is insufficient. Incidentally, these metal phases that have entered the end face portion are ground and removed together with the cemented carbide during the finishing process.
【００２０】本発明においては、上記の超砥粒分布の均
一化・緻密化のための溶融金属供給源の原料としては、
金属／金属、金属／炭化物の混合粉だけでなく、Ｃｏま
たはＮｉを主成分とする合金の成型品を用いてもよい。
この場合、組成を適切に選択することにより、基体の超
硬合金が軟化する温度以下で、共晶組成の融液を生成さ
せることができる。In the present invention, as the raw material of the molten metal supply source for uniformizing and densifying the above-mentioned superabrasive grain distribution,
Not only the mixed powder of metal / metal and metal / carbide, but also a molded product of an alloy containing Co or Ni as a main component may be used.
In this case, by appropriately selecting the composition, it is possible to generate a melt having a eutectic composition at a temperature below the temperature at which the cemented carbide of the substrate softens.
【００２１】上記金属相としてＣｏ粉末の成型品を用い
た場合、局部的に生じる融液は、基体に成分として含有
されているＷ、Ｃと共に、Ｃｏ−Ｗ−Ｃの３成分から成
る共晶組成の液として、ダイヤモンド粒子の再配列、緻
密化作用に寄与する。ダイヤモンド粒子が充填されてい
る箇所は、熱容量が格段に大きな支持材に隣接した、基
体の外周部であることから、超硬合金製のこの基体内部
が軟化する温度に到らない間に焼結を完了することが可
能で、従って焼結品の変形は実質的に防止できる。When a molded product of Co powder is used as the metal phase, the locally generated melt is a eutectic composed of Co, W, and C, as well as W and C contained as components in the substrate. As a composition liquid, it contributes to rearrangement and densification of diamond particles. Since the part filled with diamond particles is the outer peripheral part of the base material, which is adjacent to the support material with a remarkably large heat capacity, it is sintered before the temperature for softening the inside of this base material made of cemented carbide. The deformation of the sintered product can be substantially prevented.
【００２２】本発明の方法は、本質的に円筒状の基体の
表面に、超砥粒エッジ部を有する各種工具乃至工具ブラ
ンクの作成に利用できる。図１は本発明方法により作成
可能な工具素材のいくつかの構成例を示す略図である。
図の特に（ａ）において、円筒状基体１の周面２には２
本のらせん状溝３、４が形成され、超砥粒層５、６が充
填されている。線状の超砥粒層５、６の一端は、平面状
の端面７において、同様に超砥粒を充填した直線状溝８
により連結されている。また（ｂ）では、基体９は円錐
状の端面１０を有し、ここに形成された２本の超砥粒充
填放射状溝１１、１２が、（ａ）の場合と同様に周面上
の超砥粒充填溝１３、１４に接続している。さらに
（ｃ）においては、基体１５の周面上に、軸と平行な直
線状の４本の溝１６〜１９が互いに軸対称に形成され、
超砥粒層２０〜２３が充填されている。この構成におい
ては、端面上には各溝を連結する溝は設けられていな
い。The method of the present invention can be used to produce various tools or tool blanks having superabrasive edge portions on the surface of an essentially cylindrical substrate. FIG. 1 is a schematic diagram showing some examples of configurations of tool materials that can be produced by the method of the present invention.
In particular (a) of the drawing, 2 is provided on the peripheral surface 2 of the cylindrical substrate 1.
Book-like spiral grooves 3 and 4 are formed and filled with superabrasive grain layers 5 and 6. One end of each of the linear superabrasive grain layers 5 and 6 has a linear groove 8 similarly filled with superabrasive grains on the planar end face 7.
Are connected by. Further, in (b), the base body 9 has a conical end surface 10, and the two superabrasive-filled radial grooves 11 and 12 formed here are formed on the peripheral surface as in the case of (a). It is connected to the abrasive grain filling grooves 13 and 14. Further, in (c), four linear grooves 16 to 19 which are parallel to the axis are formed on the peripheral surface of the base body 15 so as to be axially symmetric with respect to each other.
Superabrasive grain layers 20 to 23 are filled. In this structure, no groove is provided on the end face to connect the grooves.
【００２３】[0023]
【実施例１】 図１に略示した構成の工具素材を作成し
た。直径１５ｍｍ、長さ４０ｍｍの円筒状のＷＣ−１３
％Ｃｏ（重量％、以下同様）組成の超硬合金製基体１に
は、円筒状表面に沿って、幅と深さがそれぞれ１．８ｍ
ｍ、３．０ｍｍの２本のらせん溝が、基体の中心線に関
して相互に軸対称の位置に、また端面には幅と深さがそ
れぞれ１．８ｍｍ、２．５ｍｍの一文字状溝を、上記ら
せん溝を連結する形状に設けた。この円筒状基体を図２
に示すように、厚さ０．１ｍｍ、幅６０ｍｍのタンタル
板２５を２周巻き付けた後、各溝の中に５／１２μｍの
ダイヤモンド粉末を充填した。次いで上記端面に接し
て、７０％Ｃｏ−３０％ＷＣ粉末を成型して成る直径１
５ｍｍ、厚さ４．０ｍｍの円板２６を配置し、さらにそ
の上に、直径１５ｍｍ厚さ５．０ｍｍのアルミナ製プラ
グ２７を置き、タンタル板２５の両端を内側に折り曲げ
てプラグ２７を固定して、反応材料とした。Example 1 A tool material having the configuration schematically shown in FIG. 1 was created. Cylindrical WC-13 with a diameter of 15 mm and a length of 40 mm
The width and depth of the cemented carbide substrate 1 having a composition of% Co (% by weight, the same applies hereinafter) is 1.8 m along the cylindrical surface.
The two spiral grooves of m and 3.0 mm are axially symmetrical to each other with respect to the center line of the base body, and the end face has the one-letter groove having the width and depth of 1.8 mm and 2.5 mm, respectively. The spiral groove is provided in a connecting shape. This cylindrical substrate is shown in FIG.
As shown in FIG. 5, a tantalum plate 25 having a thickness of 0.1 mm and a width of 60 mm was wound twice, and then each groove was filled with 5/12 μm diamond powder. Then, a diameter of 1% formed by molding 70% Co-30% WC powder in contact with the end face
A disk 26 having a thickness of 5 mm and a thickness of 4.0 mm is arranged, and an alumina plug 27 having a diameter of 15 mm and a thickness of 5.0 mm is placed on the disk 26, and both ends of the tantalum plate 25 are bent inward to fix the plug 27. As a reaction material.
【００２４】この反応材料の全周囲を、食塩製のスリー
ブ２８およびプラグ２９、３０で囲み、一軸加圧の超高
圧装置（図示せず）に装填して、約６ＧＰａ、１４００
℃の圧力温度条件で焼結を行った。反応生成物のらせん
溝部分、および端面の溝部分は、充填したダイヤモンド
粉末の焼結に伴う収縮によって、基体の外周より約０．
２ｍｍ窪んでいたが、窪みの程度はほぼ一様であり、超
硬合金基体の外周を研削することによって、切刃部がダ
イヤモンド焼結体で構成されたドリルの素材が得られ
た。The entire circumference of this reaction material is surrounded by a sleeve 28 and plugs 29 and 30 made of salt, and the reaction material is loaded into an ultra-high pressure device (not shown) of uniaxial pressurization to obtain about 6 GPa and 1400.
Sintering was performed under pressure temperature conditions of ° C. The spiral groove portion and the groove portion of the end face of the reaction product are contracted by the sintering of the filled diamond powder and contracted by about 0.
Although it was dented by 2 mm, the extent of the dent was almost uniform, and by grinding the outer circumference of the cemented carbide substrate, a drill material having a cutting edge portion made of a diamond sintered body was obtained.
【００２５】[0025]
【実施例２】 図３の材料配置により、図１（ｂ）の工
具素材を作成した。基体９としては、直径および長さは
実施例１と同じで、頂角１３５゜の円錐状の端面を有す
る全長４０ｍｍの超硬合金円筒を用いた。この基体の側
面に沿って、幅と深さが共に１．５ｍｍの２本の傾斜溝
を、基体の軸線に関して相互に対称の位置に設け、また
端面にも幅と深さが共に１．５ｍｍの一文字溝を、これ
ら２本の溝を連結する形状に設けた。この円筒に厚さ
０．１ｍｍ、幅６０ｍｍのＴａ板３１を２周巻き付けた
後、各溝の中に５／１２μｍのダイヤモンド粉末を充填
した。次いで端面に接して８０Ｎｉ−２０Ｃｒ合金粉末
と、この合金重量の２％に相当するＣ粉末とを成型した
直径１５ｍｍ、厚さ４．０ｍｍの円板３２を配置した。
この円板は、一方の端面が基体の形状に対応した窪みを
持ち、他の端面は平面となるように仕上げておいた。こ
れらの集合体の上下両端に、直径１５ｍｍ、厚さ５．０
ｍｍの超硬合金製プラグ３３、３４を置き、Ｔａ板３１
の両端を内側に折り曲げてプラグ３３、３４を固定し、
反応材料とした。この反応材料の周囲に、食塩製のスリ
ーブ３５およびプラグ３６、３７を配置して全体を囲
み、一軸加圧の超高圧装置に装填して、約６ＧＰａ、１
４００℃の圧力・温度条件で焼結を行った。回収された
品物の周面溝部分、および端面の溝部分には、上記実施
例と同程度の窪みが見られた。Example 2 With the material arrangement shown in FIG. 3, the tool material shown in FIG. 1B was created. As the substrate 9, a cemented carbide cylinder having the same diameter and length as in Example 1 and having a conical end surface with an apex angle of 135 ° and a total length of 40 mm was used. Two inclined grooves having a width and depth of 1.5 mm are provided along the side surface of the base body at positions symmetrical to each other with respect to the axis of the base body, and the end face has a width and depth of 1.5 mm. The one-character groove is formed in a shape that connects these two grooves. A Ta plate 31 having a thickness of 0.1 mm and a width of 60 mm was wound around this cylinder twice, and then each groove was filled with 5/12 μm diamond powder. Next, a disk 32 having a diameter of 15 mm and a thickness of 4.0 mm formed by molding 80Ni-20Cr alloy powder and C powder corresponding to 2% of this alloy weight was placed in contact with the end face.
This disk was finished so that one end face had a recess corresponding to the shape of the base and the other end face was flat. A diameter of 15 mm and a thickness of 5.0 at both upper and lower ends of these aggregates.
Place the cemented carbide plugs 33 and 34 of mm, and Ta plate 31
Bend both ends of the inside to fix the plugs 33 and 34,
It was used as a reaction material. Around this reaction material, a sleeve 35 and plugs 36 and 37 made of salt are placed so as to surround the whole, and the reaction material is loaded into a uniaxially pressurized ultra-high pressure device to obtain about 6 GPa, 1
Sintering was performed under the pressure and temperature conditions of 400 ° C. In the peripheral groove portion of the recovered product and the groove portion of the end surface, the same degree of depression as that in the above-described example was observed.
【００２６】[0026]
【実施例３】 図１（ｃ）の工具素材を作成した。直径
１０ｍｍ、長さ３５ｍｍの超硬合金製円筒体からなる基
体外周面に、長さ方向に、幅と深さが共に１．０ｍｍの
４本の直線状溝を、基体の軸線に関して相互に対称の位
置に設け、上記各実施例と同様にＴａ板を巻き付け後、
各溝の中に３／８μｍのダイヤモンド粉末を充填した。
次いで基体の両端面に接して９３％Ｎｉと７％Ｃｒとの
混合粉末を成型した厚さ５ｍｍのペレットを、さらにそ
の外側にアルミナ製プラグを配置し、Ｔａ板の両端を折
り曲げて全体を固定し、高温高圧反応に供した。得られ
た焼結品は研削加工によって、直径９．７ｍｍ、長さ３
２．５ｍｍのリーマ素材に仕上げた。Example 3 A tool material shown in FIG. 1C was created. Four linear grooves with a width and depth of 1.0 mm are formed in the lengthwise direction on the outer peripheral surface of the base made of a cemented carbide cylinder with a diameter of 10 mm and a length of 35 mm, and are symmetrical with respect to the axis of the base. At the position of, and after winding the Ta plate in the same manner as in each of the above embodiments,
Each groove was filled with 3/8 μm diamond powder.
Next, a 5 mm-thick pellet formed by molding a mixed powder of 93% Ni and 7% Cr in contact with both end surfaces of the base body, and further arranging alumina plugs on the outside of the pellet, bend both ends of the Ta plate to fix the whole. And subjected to high temperature and high pressure reaction. The resulting sintered product was ground to a diameter of 9.7 mm and a length of 3
Finished with 2.5mm reamer material.
【００２７】[0027]
【発明の効果】 本発明においては、円筒状基体の円周
面に形成したらせん状または直線状の細溝に、超砥粒の
微粉末を充填するのに、従来、類似の工具の製作に用い
られているような潤滑剤の使用を必要としない。したが
ってまた、これらの除去のための工程も不要である。According to the present invention, a spiral or linear fine groove formed on the circumferential surface of a cylindrical substrate is filled with fine powder of superabrasive grains, and conventionally, a similar tool is manufactured. It does not require the use of lubricants as used. Therefore, a step for removing them is also unnecessary.
【図１】 本発明の方法により作成可能な工具素材等の
例を示す見取図。FIG. 1 is a sketch drawing showing an example of a tool material or the like that can be created by the method of the present invention.
【図２】 本発明の実施に用い得る材料配置の概略を示
す模式図。FIG. 2 is a schematic diagram showing an outline of material arrangement that can be used for carrying out the present invention.
【図２】 本発明の実施に用い得る別の材料配置の概略
を示す模式図。FIG. 2 is a schematic diagram showing an outline of another material arrangement that can be used for implementing the present invention.
１ 基体 ２ 周面 ３，４ らせん状溝 ５，６ 超砥粒層 ７ 基体端面 ８ 直線状溝 ９ 基体 １０ 基体端面 １１，１２ 放射状溝 １３，１４ らせん状溝 １５ 基体 １６〜１９ 直線状溝 ２０〜２３ 超砥粒層 ２５ タンタル板 ２６ Ｃｏ−ＷＣ粉末成型円板 ２７ アルミナ製プラグ ２８ 食塩製スリーブ ２９，３０ 食塩製プラグ ３１ Ｔａ板 ３２ Ｎｉ−Ｃｒ（合金）−Ｃ成型円板 ３３，３４ 超硬合金製プラグ ３５ 食塩製スリーブ ３６，３７ 食塩製プラグ 1 Base 2 Circumferential Surface 3,4 Helical Groove 5,6 Super Abrasive Grain Layer 7 Base End Face 8 Straight Groove 9 Base 10 Base End Face 11,12 Radial Groove 13,14 Spiral Groove 15 Base 16-19 Straight Groove 20 -23 Super-abrasive grain layer 25 Tantalum plate 26 Co-WC powder molding disc 27 Alumina plug 28 Salt sleeve 29,30 Salt plug 31 Ta plate 32 Ni-Cr (alloy) -C molding disc 33,34 Ultra Hard alloy plug 35 Salt sleeve 36,37 Salt plug
【手続補正書】[Procedure amendment]
【提出日】平成７年５月１０日[Submission date] May 10, 1995
【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】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】 本発明の方法により作成可能な工具素材等の
例を示す見取図。FIG. 1 is a sketch drawing showing an example of a tool material or the like that can be created by the method of the present invention.
【図２】 本発明の実施に用い得る材料配置の概略を示
す模式図。FIG. 2 is a schematic diagram showing an outline of material arrangement that can be used for carrying out the present invention.
【図３】 本発明の実施に用い得る別の材料配置の概略
を示す模式図。FIG. 3 is a schematic diagram showing an outline of another material arrangement that can be used for carrying out the present invention.
【符号の説明】 １ 基体 ２ 周面 ３，４ らせん状溝 ５，６ 超砥粒層 ７ 基体端面 ８ 直線状溝 ９ 基体 １０ 基体端面 １１，１２ 放射状溝 １３，１４ らせん状溝 １５ 基体 １６〜１９ 直線状溝 ２０〜２３ 超砥粒層 ２５ タンタル板 ２６ Ｃｏ−ＷＣ粉未成型円板 ２７ アルミナ製プラグ ２８ 食塩製スリーブ ２９，３０ 食塩製プラグ ３１ Ｔａ板 ３２ Ｎｉ−Ｃｒ（合金）−Ｃ成型円板 ３３，３４ 超硬合金製プラグ ３５ 食塩製スリーブ ３６，３７ 食塩製プラグ[Explanation of reference numerals] 1 substrate 2 peripheral surface 3,4 spiral groove 5,6 superabrasive grain layer 7 substrate end surface 8 straight groove 9 substrate 10 substrate end surface 11, 12 radial groove 13, 14 spiral groove 15 substrate 16 to 19 Linear groove 20-23 Superabrasive grain layer 25 Tantalum plate 26 Co-WC powder unmolded disk 27 Alumina plug 28 Salt sleeve 29,30 Salt plug 31 Ta plate 32 Ni-Cr (alloy) -C molding Disc 33,34 Cemented carbide plug 35 Salt sleeve 36,37 Salt plug
Claims (8)
製基体の周面に、軸方向に延在しかつ基体端部に達する
１乃至複数本の線状溝を設け、（２）高融点金属材を基
体周面に密着配置してこれらの溝を覆い、（３）上記溝
の端部から超砥粒粉末を充填し、（４）上記円筒の少な
くとも一つの端面に接して、Ｃｏおよび／またはＮｉを
主成分とし、かつＣの共存下において基体の超硬合金の
軟化温度よりも実質的に低い共晶温度を呈する組成の溶
融金属供給源を置き、（５）上記溝の両端を高融点金属
材で密封し、（６）全体を超砥粒が熱力学的に安定な圧
力温度条件下で加熱し、これによって上記溶融金属供給
源を流動化させ超砥粒粉末間を流通させることにより、
超砥粒を一体化すると同時に全体を超硬合金製基体へ接
合することを特徴とする、軸状切削工具素材の製法。(1) One or a plurality of linear grooves extending in the axial direction and reaching the end of the base are provided on the peripheral surface of the base made of a cemented carbide having an essentially cylindrical shape, (2) ) A refractory metal material is closely arranged on the peripheral surface of the substrate to cover these grooves, (3) superabrasive powder is filled from the end of the groove, and (4) in contact with at least one end surface of the cylinder. , Co and / or Ni as a main component, and in the presence of C, a molten metal source having a composition that exhibits a eutectic temperature substantially lower than the softening temperature of the cemented carbide of the substrate is placed, and (5) the groove Both ends of each are sealed with a high melting point metal material, and (6) the entire superabrasive grains are heated under a thermodynamically stable pressure-temperature condition, whereby the molten metal supply source is fluidized, and the superabrasive grains are powdered. By distributing
A method for manufacturing a shaft-shaped cutting tool material, characterized in that superabrasive grains are integrated together and the whole is bonded to a cemented carbide substrate.
および／またはＮｉを含有し、上記（３）段階における
形態が、予め形成された合金、これらの金属と他の金属
または炭化物との混合粉末またはその成型乃至焼結物か
ら選ばれる、請求項１に記載の軸状切削工具素材の製
法。2. The composition of the molten metal source is Co
And / or Ni, and the form in the step (3) is selected from a preformed alloy, a mixed powder of these metals and another metal or carbide, or a molded or sintered product thereof. The manufacturing method of the axial cutting tool material described in.
属材を薄板として基体周面に巻き付ける、請求項１に記
載の軸状切削工具素材の製法。3. The method for producing a shaft-shaped cutting tool material according to claim 1, wherein, in the step (2), the refractory metal material is wound around the peripheral surface of the substrate as a thin plate.
属材を薄肉の管として基体周面に嵌め合わせる、請求項
１に記載の軸状切削工具素材の製法。4. The method for producing a shaft-shaped cutting tool material according to claim 1, wherein in the step (2), the refractory metal material is fitted into the peripheral surface of the base as a thin tube.
ａ、ＺｒまたはＭｏ板である、請求項１に記載の軸状切
削工具素材の製法。5. In the above (2), the refractory metal is T
The method for producing a shaft-shaped cutting tool material according to claim 1, which is an a, Zr or Mo plate.
または直線状である、請求項１に記載の軸状切削工具素
材の製法。6. The method for producing a shaft-shaped cutting tool material according to claim 1, wherein in (1), the groove is spiral or linear.
基体端面に半径方向の溝を設けてなる、請求項１に記載
の軸状切削工具素材の製法。7. The method for producing a shaft-shaped cutting tool material according to claim 1, wherein in (1) above, a groove in a radial direction is provided on an end surface of the base body so as to be connected to the groove.
窒化ホウ素である、請求項１に記載の軸状切削工具素材
の製法。8. The method for producing a shaft-shaped cutting tool material according to claim 1, wherein the superabrasive grains are diamond or high-pressure phase boron nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3893795A JPH08197339A (en) | 1995-01-20 | 1995-01-20 | Manufacture of shaft-shape cutting tool material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3893795A JPH08197339A (en) | 1995-01-20 | 1995-01-20 | Manufacture of shaft-shape cutting tool material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08197339A true JPH08197339A (en) | 1996-08-06 |
Family
ID=12539146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3893795A Pending JPH08197339A (en) | 1995-01-20 | 1995-01-20 | Manufacture of shaft-shape cutting tool material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08197339A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160797A (en) * | 2021-12-06 | 2022-03-11 | 桂林特邦新材料有限公司 | Superhard material polycrystalline composite twist milling cutter and preparation method thereof |
-
1995
- 1995-01-20 JP JP3893795A patent/JPH08197339A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160797A (en) * | 2021-12-06 | 2022-03-11 | 桂林特邦新材料有限公司 | Superhard material polycrystalline composite twist milling cutter and preparation method thereof |
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