JP3485677B2 - Super-elastic alloy material flaw inspection apparatus and inspection method - Google Patents
Super-elastic alloy material flaw inspection apparatus and inspection methodInfo
- Publication number
- JP3485677B2 JP3485677B2 JP15259195A JP15259195A JP3485677B2 JP 3485677 B2 JP3485677 B2 JP 3485677B2 JP 15259195 A JP15259195 A JP 15259195A JP 15259195 A JP15259195 A JP 15259195A JP 3485677 B2 JP3485677 B2 JP 3485677B2
- Authority
- JP
- Japan
- Prior art keywords
- reel
- flaw
- alloy material
- bending strain
- 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.)
- Expired - Lifetime
Links
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超弾性合金材の加熱に
より、自発的に発生した荷重を利用した、疵部、欠陥部
破断等の疵検査装置及びその検査方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flaw inspecting apparatus for flaws, defect fractures and the like and a method for inspecting the same, which utilizes a load spontaneously generated by heating a superelastic alloy material.
【０００２】[0002]
【従来の技術】近年、Ｎｉ−Ｔｉ系超弾性合金は、利用
分野も拡大しており、なかでも、その線材の需要は、特
に増加傾向にある。2. Description of the Related Art In recent years, Ni-Ti based superelastic alloys have been used in a wider range of fields, and in particular, the demand for wire rods thereof has been increasing.
【０００３】しかしながら、Ｎｉ−Ｔｉ系超弾性合金
は、金属間化合物で、加工性が悪く、細線等の加工にお
いて、全長にわたり、疵、欠陥がない線材等を製造する
ことは難しい。However, the Ni-Ti superelastic alloy is an intermetallic compound and has poor workability, and it is difficult to manufacture a wire or the like which is free from flaws and defects over the entire length in the processing of fine wires and the like.
【０００４】又、超弾性合金は、ステンレス、鋼等の一
般ばねに比べて、１０倍近い歪みを与えても、元の形状
に回復するという特徴を持っている。Further, the superelastic alloy is characterized in that it recovers its original shape even if it is subjected to a strain of about 10 times that of a general spring such as stainless steel or steel.
【０００５】しかしながら、大きな歪みを与えても形状
回復する特性を利用するということは、繰り返し曲げ等
の過酷な使用にも破断しないで元の形状に戻るという特
徴も必要となり、安定した耐久性の保証も必要となって
くる。However, utilizing the property of recovering the shape even when a large strain is applied requires the feature that the shape returns to the original shape without breaking even under severe use such as repeated bending, which results in stable durability. Guarantee is needed.
【０００６】これらの特性を保証するためには、できる
だけ、疵、欠陥のない線材等を全長にわたって保証する
必要がでてくる。In order to guarantee these characteristics, it is necessary to guarantee a wire rod free from flaws and defects over the entire length as much as possible.
【０００７】従来の線材等の全長にわたる非破壊的検査
方法としては、磁気渦流探傷法を利用したものが一般的
である。As a conventional nondestructive inspection method for the entire length of a wire or the like, a method using a magnetic eddy current flaw detection method is generally used.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、磁気渦
流探傷法では、疵の形態や大きさによっては、疵があっ
ても電気的な信号として判別が難しい場合もあり、特
に、細線においては、表面粗さと疵の違いを区別するた
めの条件設定が困難で、条件設定ができたとしても、疵
部の除去等を行うためには、装置の構造が複雑になると
いう問題があった。However, in the magnetic eddy current flaw detection method, it may be difficult to determine an electrical signal even if there is a flaw depending on the shape and size of the flaw. There is a problem that it is difficult to set the condition for distinguishing the difference between the roughness and the flaw, and even if the condition can be set, the structure of the device becomes complicated to remove the flaw or the like.
【０００９】これらの問題を解決するため、本発明は、
簡易的な非破壊検査方法で線材等の全長を検査すること
ができ、有害な疵部があれば、疵部を破断して破断部を
除去してしまう超弾性合金材の疵検査装置及びその検査
方法を提供するものである。In order to solve these problems, the present invention provides
It is possible to inspect the entire length of a wire or the like by a simple non-destructive inspection method, and if there is a harmful flaw, a flaw inspection device for a superelastic alloy material that breaks the flaw and removes the fracture, and its It provides an inspection method.
【００１０】[0010]
【課題を解決するための手段】即ち、本発明は、Ｎｉ−
Ｔｉ系合金からなる超弾性合金材を送る送り機と、３０
℃〜１００℃に加熱できる液槽と、複数のリールを支持
するリール支持部材と、送られた前記超弾性合金材を下
方へ方向転換する第一のリールと、前記第一のリールか
ら液中へ材料を装入し、連続的に２％以下の曲げ歪みを
与えるように配置した少なくとも３個以上の曲げ歪み用
リールと、前記３個以上の曲げ歪み用リールから連動す
る第二のリールと、前記第二のリールから材料を巻き取
る巻き取り機とからなり、前記合金材を３０℃〜１００
℃に加熱し、２％以下の曲げ歪みを与え、疵を自発的に
破断し、疵部を検査することを特徴とする超弾性合金材
の疵検査装置である。That is, the present invention provides a Ni-
A feeder for feeding a superelastic alloy material composed of a Ti-based alloy, 30
Liquid tank that can be heated to 100 ° C. to 100 ° C., a reel support member that supports a plurality of reels, a first reel that diverts the sent superelastic alloy material downward, and a submerged liquid from the first reel. At least three or more bending strain reels which are arranged so as to continuously apply a bending strain of 2% or less, and a second reel which is interlocked with the three or more bending strain reels. And a winding machine for winding the material from the second reel, the alloy material being 30 ° C. to 100 ° C.
It is a flaw inspection device for a superelastic alloy material, which is characterized by heating to 0 ° C., giving a bending strain of 2% or less, spontaneously breaking a flaw, and inspecting a flaw.
【００１１】又、本発明は、Ｎｉ−Ｔｉ系合金からなる
超弾性合金材を、３０℃〜１００℃の間に加熱した状態
で、連続的に２％以下の曲げ歪みを与え、加熱時に超弾
性合金線材が自発的に発生する回復荷重により、疵部に
応力が集中し、自発的に破断せしめ、疵部を検査するこ
とを特徴とする超弾性合金材の疵検査方法である。Further, according to the present invention, a superelastic alloy material composed of a Ni--Ti alloy is continuously heated to a bending strain of 2% or less in a state of being heated between 30 ° C. and 100 ° C. This is a flaw inspection method for a superelastic alloy material, characterized in that stress is concentrated on a flaw portion due to a recovery load spontaneously generated by the elastic alloy wire material and spontaneously fractures to inspect the flaw portion.
【００１２】[0012]
【作用】Ｎｉ−Ｔｉ系超弾性合金は、逆変態温度以上で
の変形に対して異常な伸びを示す特性があり、これを超
弾性特性と呼んでいる。又、一定歪みにおける発生荷重
は、温度が高くなるほど大きくなり、同一歪みにおい
て、温度を上げることで、荷重が増加することを意味す
る。The Ni-Ti superelastic alloy has a characteristic of exhibiting an abnormal elongation when it is deformed at a temperature higher than the reverse transformation temperature, which is called superelasticity. Further, the generated load at a constant strain increases as the temperature rises, which means that the load increases at the same strain by raising the temperature.
【００１３】図１に、径がφ０.５ｍｍのＮｉ−Ｔｉ合
金線材の応力伸び曲線について、３０℃、５０℃、７０
℃、１００℃に対しての温度依存性を示した。５％の歪
み量においても、温度が高くなるにしたがい、荷重が大
きくなることがわかる。FIG. 1 shows a stress elongation curve of a Ni-Ti alloy wire rod having a diameter of 0.5 mm at 30 ° C., 50 ° C., 70 ° C.
It showed temperature dependence with respect to ℃ and 100 ℃. It can be seen that even with a strain amount of 5%, the load increases as the temperature rises.
【００１４】この作用を利用して、材料に加熱状態で一
定歪みを与え、回復しようとする荷重を増加させ、疵が
あれば、その応力が疵部に集中することで、ノッチ効果
により破断することができる。又、疵がない部分は、破
断することなく検査することができ、線材等の全長につ
いて保証できる疵検査装置及びその検査方法となる。但
し、疵のない部分については、超弾性線の形状が永久変
形により、曲がり等が発生してはならないため、加熱状
態では、曲げ歪み量が２％以下にすることが必要であ
る。Utilizing this action, a constant strain is applied to the material in a heated state to increase the load for recovering, and if there is a flaw, the stress concentrates on the flaw portion, so that the material breaks due to the notch effect. be able to. Further, the present invention provides a flaw inspection device and its inspection method that can inspect a portion having no flaw without breaking and can guarantee the entire length of a wire or the like. However, in the portion having no flaw, since the shape of the superelastic wire is not permanently deformed and bending or the like should not occur, it is necessary that the bending strain amount is 2% or less in the heated state.
【００１５】[0015]
【実施例】次に、本発明の実施例について、図面を参照
して説明する。Embodiments of the present invention will now be described with reference to the drawings.
【００１６】図２に示すように、本発明の実施例の超弾
性合金材の疵検査装置は、液槽１、加熱用温水２、曲げ
歪み用リール３ａ，３ｂ，３ｃ、超弾性線材４（線径φ
０.５ｍｍ）、線材巻き取り機５、線材送り機６、リー
ル支持部材７、第１のリール８ａ、第２のリール８ｂか
ら構成される。As shown in FIG. 2, the flaw inspection apparatus for superelastic alloy material of the embodiment of the present invention comprises a liquid tank 1, hot water for heating 2, reels 3a, 3b and 3c for bending strain, and superelastic wire 4 ( Wire diameter φ
0.5 mm), a wire winding device 5, a wire feeding device 6, a reel supporting member 7, a first reel 8a, and a second reel 8b.
【００１７】本実施例による疵検査は、次のように行わ
れる。まず、Ｎｉ−Ｔｉ系超弾性合金の超弾性線材４
が、線材送り機６側から連続的に第１のリール８ａを介
して、加熱用温水２が入った液槽１に送られる。予め、
液槽１には、少なくとも３個以上の曲げ歪み用リール３
ａ，３ｂ，３ｃが設けられていて、送られた線材は、液
槽１の中で、初めはリール３ａの下側、次はリール３ｂ
の上側、その後はリール３ｃの下側というように波状
に、加熱状態で曲げ歪みが与えた後、連続的に巻き取り
機５で巻き取られる。ここで、線材に疵があれば、ノッ
チ効果により線材が破断し、破断箇所は除去される。な
お、第１のリール８ａ、第２のリール８ｂ、及び曲げ歪
み用リール３ａ，３ｂ，３ｃとは、本実施例では、リー
ル支持部材７によって支持されている。The flaw inspection according to this embodiment is performed as follows. First, a superelastic wire 4 made of a Ni-Ti superelastic alloy
Are continuously fed from the wire rod feeder 6 side to the liquid tank 1 containing the hot water 2 for heating via the first reel 8a. In advance
At least three bending strain reels 3 are provided in the liquid tank 1.
a, 3b, 3c are provided, and the sent wire rods are first in the liquid tank 1 below the reel 3a and then in the reel 3b.
After being subjected to bending strain in a heated state in a wave shape such as the upper side of, and then the lower side of the reel 3c, it is continuously wound by the winder 5. Here, if the wire has a flaw, the wire is broken by the notch effect, and the broken portion is removed. The first reel 8a, the second reel 8b, and the bending strain reels 3a, 3b, 3c are supported by the reel support member 7 in this embodiment.
【００１８】表１、表２に、リール径と温水の温度、及
び疵の深さについて、破断の有無の関係と、疵がない超
弾性線材の検査後の曲がり（永久変形）の有無を示す。Tables 1 and 2 show the relationship between the reel diameter, the temperature of the hot water, and the depth of the flaw, whether or not there is a break, and whether or not the flaw-free superelastic wire is bent (permanently deformed) after inspection. .
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】当検査においては、３０℃〜１００℃の温
度で２％以下の曲げ歪みを与えることにより、深さ０.
１ｍｍ〜０.３ｍｍの疵を検査破断せしめ、なおかつ、
疵のない部分は、形状変化（永久変形）なしで、超弾性
線材の疵なしの検査ができた。In this inspection, a bending strain of not more than 2% was applied at a temperature of 30 ° C. to 100 ° C., so that the depth of 0.
1mm to 0.3mm flaws are inspected and broken, and
The flaw-free portion was able to be inspected without any flaws in the superelastic wire without change in shape (permanent deformation).
【００２２】なお、本実施例は、加熱方法として、温水
を使用したが、加熱方法は何でもよく、恒温装置、ヒー
ター加熱法等を使用してもよい。Although hot water is used as the heating method in this embodiment, any heating method may be used, such as a thermostatic device or a heater heating method.
【００２３】又、曲げ歪み用リールについても、線材に
歪みを与えるための方法は、波状やＳ状や螺旋状等、い
くつかあり、何れも同様の方法として考えられる。Regarding the bending strain reel, there are several methods for imparting strain to the wire material, such as a wavy shape, an S shape, and a spiral shape, and any of them can be considered as the same method.
【００２４】又、実施例では線材を使用したが、異形線
材、板材等にも応用が可能である。Further, although the wire rod is used in the embodiment, it can be applied to a deformed wire rod, a plate material and the like.
【００２５】[0025]
【発明の効果】本発明によれば、超弾性線材を全長にわ
たって、疵検査ができ、全数を保証できるようになっ
た。As described above, according to the present invention, it is possible to inspect for flaws over the entire length of the superelastic wire and to guarantee the total number.
【図面の簡単な説明】[Brief description of drawings]
【図１】Ｎｉ−Ｔｉ合金の超弾性線材の応力伸び曲線を
示す図。図１（ａ）は、超弾性線材の応力伸び曲線で、
３０℃、５０℃に対しての温度依存性を示す図。図１
（ｂ）は、超弾性線材の応力伸び曲線で、７０℃、１０
０℃に対しての温度依存性を示す図。FIG. 1 is a diagram showing a stress elongation curve of a superelastic wire of Ni—Ti alloy. FIG. 1 (a) is a stress elongation curve of a super elastic wire,
The figure which shows the temperature dependence with respect to 30 degreeC and 50 degreeC. Figure 1
(B) is a stress elongation curve of a super elastic wire at 70 ° C., 10
The figure which shows the temperature dependence with respect to 0 degreeC.
【図２】本発明の実施例における疵検査装置を示す断面
図。FIG. 2 is a sectional view showing a flaw inspection device according to an embodiment of the present invention.
１ 液槽 ２ 加熱用温水 ３ａ，３ｂ，３ｃ 曲げ歪み用リール ４ 超弾性線材 ５ （線材）巻き取り機 ６ 線材送り機 ７ リール支持部材 ８ａ 第１のリール ８ｂ 第２のリール 1 liquid tank 2 Hot water for heating 3a, 3b, 3c Bending strain reel 4 Super elastic wire 5 (Wire material) winding machine 6 wire rod feeder 7 Reel support member 8a first reel 8b Second reel
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 3/00 - 3/62 G01N 21/84 - 21/958 C22C 1/00 - 1/10 ＪＩＣＳＴファイル（ＪＯＩＳ)─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) G01N 3/00-3/62 G01N 21/84-21/958 C22C 1/00-1/10 JISST file ( JOIS)
Claims (2)
を送る送り機と、３０℃〜１００℃に加熱できる液槽
と、複数のリールを支持するリール支持部材と、送られ
た前記超弾性合金材を下方へ方向転換する第一のリール
と、前記第一のリールから液中へ材料を装入し、連続的
に２％以下の曲げ歪みを与えるように配置した少なくと
も３個以上の曲げ歪み用リールと、前記３個以上の曲げ
歪み用リールから連動する第二のリールと、前記第二の
リールから材料を巻き取る巻き取り機とからなり、前記
合金材を３０℃〜１００℃に加熱し、２％以下の曲げ歪
みを与え、疵を自発的に破断し、疵部を検査することを
特徴とする超弾性合金材の疵検査装置。1. A feeder for feeding a superelastic alloy material made of a Ni—Ti alloy, a liquid tank capable of heating at 30 ° C. to 100 ° C., a reel supporting member for supporting a plurality of reels, and the fed super alloy. A first reel for redirecting the elastic alloy material downward, and at least three or more reels arranged so as to continuously apply a bending strain of 2% or less by charging the material into the liquid from the first reel. It comprises a bending strain reel, a second reel that is interlocked with the three or more bending strain reels, and a winding machine that winds the material from the second reel, and the alloy material is 30 ° C. to 100 ° C. A flaw inspection apparatus for a superelastic alloy material, which is characterized in that a flaw is spontaneously ruptured by applying a bending strain of 2% or less to an inspected flaw portion.
を、３０℃〜１００℃の間に加熱した状態で、連続的に
２％以下の曲げ歪みを与え、加熱時に超弾性合金線材が
自発的に発生する回復荷重により、疵部に応力が集中
し、自発的に破断せしめ、疵部を検査することを特徴と
する超弾性合金材の疵検査方法。2. A superelastic alloy wire made of a Ni—Ti alloy is continuously heated to a bending strain of 2% or less in a state of being heated at 30 ° C. to 100 ° C. A flaw inspection method for a superelastic alloy material, characterized in that stress is concentrated on a flaw portion due to a spontaneously generated recovery load to cause spontaneous breakage and the flaw portion is inspected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15259195A JP3485677B2 (en) | 1995-05-25 | 1995-05-25 | Super-elastic alloy material flaw inspection apparatus and inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15259195A JP3485677B2 (en) | 1995-05-25 | 1995-05-25 | Super-elastic alloy material flaw inspection apparatus and inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08320280A JPH08320280A (en) | 1996-12-03 |
| JP3485677B2 true JP3485677B2 (en) | 2004-01-13 |
Family
ID=15543794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15259195A Expired - Lifetime JP3485677B2 (en) | 1995-05-25 | 1995-05-25 | Super-elastic alloy material flaw inspection apparatus and inspection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3485677B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682701B (en) * | 2017-01-20 | 2021-06-01 | 杭州富通通信技术股份有限公司 | Method for evaluating cracking resistance of flame-retardant optical cable protective layer |
| CN109163969A (en) * | 2018-09-03 | 2019-01-08 | 河南检亿科技有限公司 | A kind of device for the test of wire and cable cracking resistance |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0485151U (en) * | 1990-11-28 | 1992-07-23 | ||
| JP2800548B2 (en) * | 1991-05-27 | 1998-09-21 | 住友電気工業株式会社 | Automatic screening system for optical fiber |
| JP3098587B2 (en) * | 1991-10-22 | 2000-10-16 | 古河電気工業株式会社 | Method and apparatus for manufacturing Ni-Ti based shape memory alloy wire for linear actuator |
| JPH0633160A (en) * | 1992-07-15 | 1994-02-08 | Tokin Corp | Spring material |
| JPH06264161A (en) * | 1992-10-07 | 1994-09-20 | Yasubumi Furuya | Metallic composite material having improved strength and vibration-damping property |
| JPH07124715A (en) * | 1993-10-29 | 1995-05-16 | Tokin Corp | Production of fine wire of tini-based shape memory alloy |
-
1995
- 1995-05-25 JP JP15259195A patent/JP3485677B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08320280A (en) | 1996-12-03 |
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