JPS6126014B2 - - Google Patents
Info
- Publication number
- JPS6126014B2 JPS6126014B2 JP10584381A JP10584381A JPS6126014B2 JP S6126014 B2 JPS6126014 B2 JP S6126014B2 JP 10584381 A JP10584381 A JP 10584381A JP 10584381 A JP10584381 A JP 10584381A JP S6126014 B2 JPS6126014 B2 JP S6126014B2
- Authority
- JP
- Japan
- Prior art keywords
- gripping
- sprayed layer
- sprayed
- test piece
- layer
- 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.)
- Expired
Links
- 238000012360 testing method Methods 0.000 claims description 23
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 238000004154 testing of material Methods 0.000 claims description 6
- 230000037303 wrinkles Effects 0.000 description 14
- 239000000463 material Substances 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 230000003746 surface roughness Effects 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 3
- 229910000423 chromium oxide Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- -1 thin plates Substances 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【発明の詳細な説明】
本発明は、引張試験、硬さ試験、疲れ試験、エ
リクセン試験等の材料強度試験機特に薄板、細
線、紙、布などの強度試験に用いる試験片つかみ
部に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material strength testing machine such as a tensile test, hardness test, fatigue test, and Erichsen test, and particularly to a specimen gripping part used for strength testing of thin plates, thin wires, paper, cloth, etc. be.
材料の強度に関する性質を解明する方法とし
て、引張、硬さ、疲れ試験などの材料試験方法が
ある。このような試験において、被試験材に均一
な力または変形を与えるために、均一な力が加わ
るような試験片形状とすると共に試験片のつかみ
部として第１図に示すように鉄鋼材料よりなるつ
かみ部材ａの試験片つかみ面に機械加工によつて
やすり目状の歯形ｂをつけたものを用いている。
材料試験機は、船舶用金属材料の大型材料の強度
判定から進歩してきたもので、つかみ部は上記の
ようにつかみ面にやすり目状の歯形をつけた後、
焼入、焼戻しの熱処理を行なつて耐摩耗性を付与
している。近年の材料技術は著しく進歩し、構造
物、部品、材料の信頼性向上に対しては、上述の
材料試験評価法が必要となつている。しかして従
来のつかみ部のつかみ面はやすり目状の歯部が粗
大であり、またその精度が出にくいため、試験片
のつかみ面全体に均一に締めつけ力が加わらず、
薄板、紙、布などをつかむ場合そのつかみ面内で
試験片が破断するので、このような物への適用が
不可能であつた。一方または高強度材料の出現に
よつて、つかみ部の摩耗が著しくなつてきてい
る。そのため、耐摩耗性でかつ上記のような薄板
や紙、布などの材料にも用いることのできるつか
み部が望まれていた。 Material testing methods such as tensile, hardness, and fatigue tests are available as a method for elucidating properties related to the strength of materials. In such tests, in order to apply a uniform force or deformation to the material being tested, the shape of the test piece is such that a uniform force is applied, and the gripping part of the test piece is made of steel material as shown in Figure 1. A gripping member (a) with a tooth profile (b) in the form of a file formed by machining on the test specimen gripping surface is used.
Material testing machines have evolved from the ability to judge the strength of large metal materials for ships.
Heat treatment of quenching and tempering is performed to impart wear resistance. Material technology has advanced significantly in recent years, and the above-mentioned material testing and evaluation methods have become necessary to improve the reliability of structures, parts, and materials. However, the gripping surface of the conventional gripping part has coarse toothed teeth, and it is difficult to achieve accuracy, so the clamping force cannot be applied uniformly to the entire gripping surface of the specimen.
When gripping a thin plate, paper, cloth, etc., the test piece would break within the gripping surface, making it impossible to apply to such objects. On the other hand, with the advent of high-strength materials, the wear of the gripping portion has become significant. Therefore, there has been a desire for a gripping portion that is wear-resistant and can be used with materials such as the above-mentioned thin plates, paper, and cloth.
本発明は、上記の点にかんがみ、試験片をつか
み面全面に亘つて均一に締め付けることができる
と共に耐摩耗性に優れ、薄板、細線、プラスチツ
ク、紙、布等の試験にも用いることのできる材料
試験機用試験片つかみ部を提供するものであつ
て、以下図面について詳細に説明する。 In view of the above points, the present invention is capable of uniformly tightening the test specimen over the entire gripping surface, has excellent wear resistance, and can be used for testing thin plates, thin wires, plastics, paper, cloth, etc. This invention provides a specimen gripping part for a material testing machine, and the drawings will be described in detail below.
第２図はエリクセン試験機のつかみ部に適用し
た本発明の一実施例を示し、３はダイス、２はし
わ押え、１はポンチである。これらしわ押え２お
よびダイス３をなす鉄鋼は、ビツカース硬さ400
以上を有するものである。このような硬さのもの
にするのは、締め付けによる圧縮力により変形し
ないようにするためである。４はしわ押え２のつ
かみ面にこれらを構成する金属の硬さより著しく
高いビツカース硬さ1000以上を有する耐摩耗性を
もつ酸化金属の溶射層であつて、タングステンカ
ーバイド、アルミナ、酸化クロム等の溶射層であ
る。なお、しわ押え２の本体部と別体にビツカー
ス硬さ400以上の金属板体の片面に上記のような
金属酸化物の溶射層を設けたつかみ部を作り、こ
れをしわ押え本体下部に装着するようにしてもよ
く、その場合つかみ部を安価に製作でき、また取
り外しが自在となる。またダイス３のつかみ面に
も上記のような酸化金属の溶射層を設けてもよい
ことは勿論である。 FIG. 2 shows an embodiment of the present invention applied to the grip of an Erichsen tester, where 3 is a die, 2 is a wrinkle presser, and 1 is a punch. The steel that makes up the wrinkle presser 2 and the die 3 has a Bitkers hardness of 400.
It has the above. The reason why it is made to have such hardness is to prevent deformation due to compressive force caused by tightening. 4 is a thermally sprayed layer of a wear-resistant metal oxide having a Vickers hardness of 1000 or more, which is significantly higher than the hardness of the metals constituting these, on the gripping surface of the wrinkle presser 2, and is a thermally sprayed layer of tungsten carbide, alumina, chromium oxide, etc. It is a layer. In addition, a grip part is made separately from the main body of the wrinkle presser 2, and a metal plate with a Bitkers hardness of 400 or more is coated with a sprayed layer of metal oxide as described above on one side, and this is attached to the bottom of the wrinkle presser body. In this case, the grip portion can be manufactured at low cost and can be removed freely. It goes without saying that the gripping surface of the die 3 may also be provided with a sprayed layer of metal oxide as described above.
第３図ａ，ｂはそれぞれ鉄鋼材料上に形成した
アルミナ溶射層およびタングステン溶射層を表面
あらさ計で計測した表面あらさの一例を示す。酸
化クロームを溶射した場合もこれらタングステン
カーバイド溶射層やアルミナ溶射層と同様な溶射
層となる。第３図では横軸が縦軸に対し著しく縮
めて示されている。このように金属酸化物の溶射
層は全面的に均等に分布される微小な凹凸を形成
するのでつかみ面全体に亘り試験片を均一に締め
つけることができる。金属酸化物の溶射層の表面
あらさは溶射粉末の粒径によつて自由に調整でき
るので試験片の厚さ、線径等に合わせることがで
きる。 FIGS. 3a and 3b show an example of the surface roughness of an alumina sprayed layer and a tungsten sprayed layer formed on a steel material, respectively, measured using a surface roughness meter. Even when chromium oxide is sprayed, a sprayed layer similar to these tungsten carbide sprayed layers and alumina sprayed layers is obtained. In FIG. 3, the horizontal axis is shown significantly compressed relative to the vertical axis. In this way, the sprayed metal oxide layer forms minute irregularities that are evenly distributed over the entire surface, so the test piece can be clamped uniformly over the entire gripping surface. The surface roughness of the sprayed metal oxide layer can be freely adjusted by adjusting the particle size of the sprayed powder, so it can be matched to the thickness, wire diameter, etc. of the test piece.
前記第２図に示したエリクセン試験機のしわ押
え２の試験片おさえ面に、表面さらさ10μｍとし
たタングステンカーバイドの溶射層を形成させた
ものと、従来のしわ押えを用いたものとにより板
厚30μｍのステンレスの試料についてエリクセン
試験を行なつた結果、従来のしわ押えを用いたも
のではしわ押え部分に波形のしわが発生し、エリ
クセン値が約２mm高めに出たが、上記のようにし
た本発明のしわ押えを用いた場合、しわ押えが完
全であり、ポンチ先端に規則性のあるクラツクが
発生し、しわ押えが完全であることが実証され
た。 The plate thickness was determined by forming a sprayed layer of tungsten carbide with a surface exposure of 10 μm on the specimen holding surface of the wrinkle presser 2 of the Erichsen tester shown in Fig. 2, and by using a conventional wrinkle press. As a result of performing an Erichsen test on a 30 μm stainless steel sample, when using a conventional wrinkle presser, wavy wrinkles occurred in the wrinkle presser area, and the Erichsen value was about 2 mm higher, but when using the method described above, When the wrinkle presser of the present invention was used, the wrinkle presser was perfect, and regular cracks were generated at the tip of the punch, proving that the wrinkle presser was perfect.
第４図は線材試験用のつかみ部に適用した本発
明の他の実施例を示し、Ｖ形溝６を設けたビツカ
ース硬さ400以上を有する17−７PHステンレス鋼
よりなるつかみ部材５のＶ形溝６の面に10μｍの
表面あらさにした酸化クロムの溶射層７を設けた
ものである。なおこの図では、一方側のつかみ部
のみを示したが、対向するつかみ部も同様に構成
される。 FIG. 4 shows another embodiment of the present invention applied to a gripping part for wire rod testing, in which a gripping member 5 made of 17-7PH stainless steel having a Vickers hardness of 400 or more and having a V-shaped groove 6 is formed. A sprayed layer 7 of chromium oxide with a surface roughness of 10 μm is provided on the surface of the groove 6. In this figure, only the gripping portion on one side is shown, but the gripping portions on the opposite side are also configured in the same manner.
このようなつかみ部を線材の疲れ試験機に用い
て線径２mmの線材試料の両振り曲げの連続試験を
行ない、試験片とつかみ部のゆるみを観察したと
ころ、両者間にすき間の発生はなく、完全な締め
付けがなされていることが実証された。 Using this type of grip in a wire fatigue tester, we conducted continuous bidirectional bending tests on wire rod samples with a wire diameter of 2 mm, and observed the loosening of the test piece and the grip, and found that there was no gap between the two. , it was demonstrated that complete tightening was achieved.
第５図は本発明の他の実施例を示し、ビツカー
ス硬さ430を有するベリリウム銅よりなるつかみ
部材８のつかみ面に表面あらさが20μｍになるよ
う粒径を調節してアルミナの溶射層９を形成し、
該アルミナ溶射層９の表面に該アルミナ溶射層９
の表面の凹凸が消失しない程度にナイロンのフイ
ルム層１０を積層したものである。これは金属材
料以外の試験片たとえばプラスチツク、紙、布な
どの箔のような試験片に特に好適であり、ナイロ
ンフイルム層１０はアルミナ溶射層の尖鋭さを和
らげる。このようなつかみ部を引張試験機に用い
て紙の引張試験を行なつたところ、従来のつかみ
部を用いた場合にはつかみ面内での破断を生じた
のに、そのようなことが全く起らず試験片の中央
部で切断した。 FIG. 5 shows another embodiment of the present invention, in which a sprayed alumina layer 9 is coated on the gripping surface of a gripping member 8 made of beryllium copper having a Vickers hardness of 430, with the particle size adjusted so that the surface roughness is 20 μm. form,
The alumina sprayed layer 9 is on the surface of the alumina sprayed layer 9.
Nylon film layers 10 are laminated to such an extent that the unevenness of the surface does not disappear. This is particularly suitable for specimens other than metallic materials, such as foils of plastic, paper, cloth, etc., where the nylon film layer 10 softens the sharpness of the alumina sprayed layer. When we conducted a tensile test on paper using such a gripping part in a tensile testing machine, we found that when conventional gripping parts were used, rupture occurred within the gripping surface, but this did not occur at all. The test piece was cut at the center of the test piece.
本発明は以上説明したように、つかみ部材の試
験片つかみ面につかみ部材の硬さより著しく高い
硬さを有する金属酸化物の溶射層を設けたもので
あるから、試験片に均一な締め付け力を与えるこ
とができ、耐摩耗性においても従来のものより改
善できるばかりでなく、高強度材料のものや、薄
板、紙、布等にも用いることができる。 As explained above, in the present invention, a sprayed layer of metal oxide having a hardness significantly higher than that of the gripping member is provided on the specimen gripping surface of the gripping member, so that a uniform clamping force can be applied to the specimen. Not only can the abrasion resistance be improved over conventional ones, but it can also be used for high-strength materials, thin plates, paper, cloth, etc.
第１図は従来の材料試験機用試験片つかみ部の
斜視図、第２図はエリクセン試験機のしわ押えに
適用した本発明の一実施例の側面図、第３図ａは
アルミナ溶射層の表面あらさに計測図、同図ｂは
タングステンカーバイド溶射層の表面あらさの計
測図、第４図は線材試験用つかみ部に適用した他
の実施例の斜視図、第５図は更に他の実施例の要
部断面図を示す。
２，５，８……つかみ部材、４，７，９……金
属酸化物溶射層。
Fig. 1 is a perspective view of a conventional specimen gripping part for a material testing machine, Fig. 2 is a side view of an embodiment of the present invention applied to a wrinkle holder for an Erichsen testing machine, and Fig. 3a is a view of an alumina sprayed layer. A measurement diagram of the surface roughness, Figure b is a measurement diagram of the surface roughness of the tungsten carbide sprayed layer, Figure 4 is a perspective view of another embodiment applied to a grip part for wire rod testing, and Figure 5 is still another embodiment. A sectional view of the main parts is shown. 2, 5, 8... Grip member, 4, 7, 9... Metal oxide sprayed layer.
Claims (1)
材の硬さより著しく高い硬さを有する金属酸化物
の溶射層を設けたことを特徴とする材料試験機用
試験片つかみ部。1. A test piece gripping part for a material testing machine, characterized in that a sprayed layer of a metal oxide having a hardness significantly higher than that of the gripping member is provided on the test piece gripping surface of the gripping member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584381A JPS587540A (en) | 1981-07-07 | 1981-07-07 | Sample crasping member for material tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584381A JPS587540A (en) | 1981-07-07 | 1981-07-07 | Sample crasping member for material tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS587540A JPS587540A (en) | 1983-01-17 |
| JPS6126014B2 true JPS6126014B2 (en) | 1986-06-18 |
Family
ID=14418292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10584381A Granted JPS587540A (en) | 1981-07-07 | 1981-07-07 | Sample crasping member for material tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268794A (en) * | 2020-09-29 | 2021-01-26 | 中国科学院金属研究所 | Method for determining optimal anti-armor-piercing microstructure state of metal material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4688162B2 (en) * | 2006-04-05 | 2011-05-25 | 株式会社島津製作所 | Test method for thermal fatigue, test piece for thermal fatigue test, and joint for mounting test piece for thermal fatigue test |
| CN106248459A (en) * | 2016-09-29 | 2016-12-21 | 贵州大学 | A kind of Double End stone mill Standard rock sample fixing device and operational approach |
-
1981
- 1981-07-07 JP JP10584381A patent/JPS587540A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268794A (en) * | 2020-09-29 | 2021-01-26 | 中国科学院金属研究所 | Method for determining optimal anti-armor-piercing microstructure state of metal material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS587540A (en) | 1983-01-17 |
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