JPH08219967A - Diamond tool for measuring hardness - Google Patents
Diamond tool for measuring hardnessInfo
- Publication number
- JPH08219967A JPH08219967A JP5965795A JP5965795A JPH08219967A JP H08219967 A JPH08219967 A JP H08219967A JP 5965795 A JP5965795 A JP 5965795A JP 5965795 A JP5965795 A JP 5965795A JP H08219967 A JPH08219967 A JP H08219967A
- Authority
- JP
- Japan
- Prior art keywords
- diamond
- cemented carbide
- rear end
- floor plate
- sintered alloy
- 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
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、硬さ測定用ダイヤモン
ド圧子に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hardness measuring diamond indenter.
【０００２】[0002]
【従来の技術】従来の硬さ測定用圧子は図１で示す如
く、先端部を所要形状に研磨したダイヤモンド１が焼結
合金２に埋め込まれ、シャンク３に埋設しろう付けされ
ている。2. Description of the Related Art In a conventional hardness measuring indenter, as shown in FIG. 1, a diamond 1 having a tip end polished into a desired shape is embedded in a sintered alloy 2 and then embedded in a shank 3 and brazed.
【０００３】[0003]
【発明が解決しようとする課題】図１で示すロックウェ
ル圧子の場合、円錐角１２０°±３０’、先端丸み半径
０．２ｍｍ±０．０２に研磨されたダイヤモンドの先端
部にＣスケールで測定時１５０ｋｇもの荷重がかけられ
る。In the case of the Rockwell indenter shown in FIG. 1, the C-scale is used to measure the tip of a diamond polished to a cone angle of 120 ° ± 30 ′ and a tip radius of radius of 0.2 mm ± 0.02. A load of up to 150 kg can be applied.
【０００４】このため、長期に渡り繰り返し使用される
と、焼結体とダイヤモンドとの間に微小なゆるみが生じ
測定精度に影響を与えていたり、長期の使用に耐えなか
った。For this reason, when it is repeatedly used for a long period of time, a minute looseness occurs between the sintered body and the diamond, which affects the measurement accuracy and cannot withstand long-term use.
【０００５】[0005]
【課題を解決するための手段】耐圧上ダイヤモンドは大
きい程より好ましいが、その価格はカラット数の自乗に
比例して高くなると言われている。又測定子として使わ
れるダイヤモンドは正８面体ないしは正１２面体に近い
結晶で、内部にキズ、クラックのない良質なものが選別
されるため、入手が容易とは言えない。このため、通常
１／６〜１／４ｃｔｓの比較的小粒のダイヤモンドが使
われるが、その大きさは１．５〜１．８球程度である。Larger diamonds are more preferable in terms of pressure resistance, but their price is said to increase in proportion to the square of the carat number. Further, the diamond used as a measuring element is a crystal of a regular octahedron or a close to a regular dodecahedron, and a good quality one without scratches and cracks inside is selected, so that it cannot be said to be easily available. For this reason, relatively small diamonds of 1/6 to 1/4 cts are usually used, and the size thereof is about 1.5 to 1.8 spheres.
【０００６】本発明はかかる微小なダイヤモンドにかか
る大きな荷重をダイヤモンドの後端部に超硬合金からな
る敷板を介して焼結合金に埋め込み、ダイヤモンドにか
かる荷重を超硬合金敷板全面で受けるようにしたもので
ある。According to the present invention, a large load applied to such a minute diamond is embedded in the sintered alloy at the rear end of the diamond via a floor plate made of cemented carbide so that the load applied to the diamond is received on the entire surface of the cemented carbide floor plate. It was done.
【０００７】以下、実施例を図面に基づき説明する。図
２は本発明の一実施例におけるロックウェル圧子の断面
図である。図において１はダイヤモンド圧子、２は焼結
合金でその組成はＦｅ−Ｃｕ−Ｎｉである。３はＷＣ−
Ｃｏ系超硬合金で大きさはφ４−１．０Ｔである。Embodiments will be described below with reference to the drawings. FIG. 2 is a sectional view of a Rockwell indenter according to an embodiment of the present invention. In the figure, 1 is a diamond indenter, 2 is a sintered alloy, and its composition is Fe-Cu-Ni. 3 is WC-
It is a Co-based cemented carbide and has a size of φ4-1.0 T.
【０００８】仮りにダイヤモンドの後端部がφ１．５で
あるとすると、１５０ｋｇの荷重に対し約８５ｋｇ／ｍ
ｍ２の圧力がかかることになるが、φ４の超硬合金敷板
全面に受けるようにした場合、約１２ｋｇ／ｍｍ２とな
り１／４に軽減される。これによりダイヤモンドが焼結
体中でゆるむが如きトラブルは全く解消される。Assuming that the rear end of diamond is φ1.5, about 85 kg / m under a load of 150 kg.
Although a pressure of m 2 is applied, when the pressure is applied to the entire surface of the φ4 cemented carbide floor plate, the pressure is reduced to about 12 kg / mm 2 and reduced to 1/4. As a result, problems such as loosening of diamond in the sintered body are completely eliminated.
【０００９】超硬合金敷板をダイヤモンド後端部に介在
させることは効果を発揮するが、ダイヤモンド粒があま
りに小さい場合超硬合金敷板の大きさも制限を受ける。
更に図３に示す如く焼結体が上部のダイヤモンド保持部
２１と超硬合金敷板下部２２に分断され、強度上からも
好ましくない。Interposing a cemented carbide base plate at the rear end of the diamond is effective, but if the diamond grains are too small, the size of the cemented carbide base plate is also limited.
Further, as shown in FIG. 3, the sintered body is divided into the upper diamond holding portion 21 and the lower portion 22 of the cemented carbide underlay plate, which is not preferable in terms of strength.
【００１０】図４は本発明の他の実施例を示すが、柱状
ダイヤモンドを用いることで大径のダイヤモンドを用い
た場合以上に深い位置に超硬合金敷板を介在させること
ができる。このため超硬合金敷板の大きさに前述の如き
制限を受けない。１１は柱状ダイヤモンドでその大きさ
は０．６−０．６−３Ｌである。柱状ダイヤモンドの後
端部５は平面に研磨されており、超硬合金敷板３に全面
接触させる。これによって荷重がかけられた時倒れる方
向に力がかからず垂直に超硬敷板に力がかかるようにな
る。FIG. 4 shows another embodiment of the present invention. By using columnar diamond, it is possible to interpose a cemented carbide laid plate at a deeper position than when a large-diameter diamond is used. For this reason, the size of the cemented carbide floor plate is not restricted as described above. The columnar diamond 11 has a size of 0.6-0.6-3 L. The rear end portion 5 of the columnar diamond is polished into a flat surface, and is brought into full contact with the cemented carbide laid plate 3. As a result, when a load is applied, no force is exerted in the direction of falling and the force is exerted vertically on the cemented carbide board.
【００１１】[0011]
【発明の効果】このように本発明は、硬さ測定用ダイヤ
モンド圧子のダイヤモンドの後端部に超硬合金敷板で支
え焼結合金に埋めた構造とするため微小なダイヤモンド
にかかる荷重を超硬合金敷板に分散し、ダイヤモンドの
ゆるみが全く起こることのないようにしたものである。
更には後端面を平面に研磨した柱状ダイヤモンドを用い
ることで効果をより一層高くするものである。As described above, the present invention has a structure in which the rear end portion of the diamond of the diamond indenter for hardness measurement is supported by the cemented carbide laying plate and embedded in the sintered alloy, so that the load applied to the minute diamond is It is dispersed in an alloy floor plate so that the loosening of diamond does not occur at all.
Further, the effect is further enhanced by using columnar diamond whose rear end face is polished into a flat surface.
【図１】従来の硬さ測定用ダイヤモンド圧子の断面図。FIG. 1 is a sectional view of a conventional diamond indenter for hardness measurement.
【図２】本発明の硬さ測定用ダイヤモンドの要部断面
図。FIG. 2 is a sectional view of an essential part of a hardness measuring diamond of the present invention.
【図３】微小なダイヤモンドを用いた場合の説明図。FIG. 3 is an explanatory view when a minute diamond is used.
【図４】本発明の他の実施例の要部断面図。FIG. 4 is a cross-sectional view of the essential parts of another embodiment of the present invention.
１ ダイヤモンド ２ 焼結合金 ３ シャンク ４ 超硬合金敷板 ５ 柱状ダイヤモンドの後端部平面研磨面 １１ 柱状ダイヤモンド ２１ ダイヤモンド保持部の焼結合金部分 ２２ 超硬合金敷板下部の焼結合金部分 1 Diamond 2 Sintered Alloy 3 Shank 4 Cemented Carbide Laying Plate 5 Rear Polished Surface of Columnar Diamond 11 Columnar Diamond 21 Sintered Alloy Part of Diamond Holding Part 22 Sintered Alloy Part of Cemented Carbide Laminate
Claims (3)
ドを焼結合金に植設し、シャンクに固着した硬さ測定用
ダイヤモンド圧子に於て、該ダイヤモンドの後端部に接
触させて超硬合金敷板を該焼結合金中に埋設させたこと
を特徴とする硬さ測定用ダイヤモンド圧子。1. In a diamond indenter for hardness measurement fixed to a shank, a diamond whose tip is polished into a required shape is implanted into a sintered alloy and brought into contact with the rear end of the diamond to form a cemented carbide. A diamond indenter for hardness measurement, wherein a floor plate is embedded in the sintered alloy.
し該研磨面を該超硬合金敷板に接触させて該焼結合金に
埋設した前記記載の硬さ測定用ダイヤモンド圧子。2. The diamond indenter for hardness measurement according to claim 1, wherein a rear end portion of the diamond is ground into a flat surface and the polished surface is brought into contact with the cemented carbide laying plate to be embedded in the sintered alloy.
する請求項２記載の硬さ測定用ダイヤモンド圧子。3. The hardness measuring diamond indenter according to claim 2, wherein the diamond is columnar diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5965795A JPH08219967A (en) | 1995-02-10 | 1995-02-10 | Diamond tool for measuring hardness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5965795A JPH08219967A (en) | 1995-02-10 | 1995-02-10 | Diamond tool for measuring hardness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08219967A true JPH08219967A (en) | 1996-08-30 |
Family
ID=13119500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5965795A Pending JPH08219967A (en) | 1995-02-10 | 1995-02-10 | Diamond tool for measuring hardness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08219967A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024649A (en) * | 2011-07-19 | 2013-02-04 | Allied Material Corp | Diamond indenter and manufacturing method thereof |
| GB2494467A (en) * | 2011-09-12 | 2013-03-13 | Micro Materials Ltd | Test probe for materials testing apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0476401A (en) * | 1990-07-18 | 1992-03-11 | Noritake Co Ltd | Diamond coated measuring tool and its manufacture |
-
1995
- 1995-02-10 JP JP5965795A patent/JPH08219967A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0476401A (en) * | 1990-07-18 | 1992-03-11 | Noritake Co Ltd | Diamond coated measuring tool and its manufacture |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024649A (en) * | 2011-07-19 | 2013-02-04 | Allied Material Corp | Diamond indenter and manufacturing method thereof |
| GB2494467A (en) * | 2011-09-12 | 2013-03-13 | Micro Materials Ltd | Test probe for materials testing apparatus |
| GB2494467B (en) * | 2011-09-12 | 2013-08-07 | Micro Materials Ltd | Test probe for materials testing apparatus |
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