JP2655846B2 - Metal plate residual strain evaluation test method - Google Patents
Metal plate residual strain evaluation test methodInfo
- Publication number
- JP2655846B2 JP2655846B2 JP62225890A JP22589087A JP2655846B2 JP 2655846 B2 JP2655846 B2 JP 2655846B2 JP 62225890 A JP62225890 A JP 62225890A JP 22589087 A JP22589087 A JP 22589087A JP 2655846 B2 JP2655846 B2 JP 2655846B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- residual strain
- evaluation
- test method
- evaluation test
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、金属板（帯板も含む。以下同じ）の残留歪
を簡易的に評価する試験方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a test method for simply evaluating the residual strain of a metal plate (including a band plate; the same applies hereinafter).
残留歪が発生している金属板は、金属板の一部を除去
すると、金属板内部のつり合いが破れ、全体が変形し、
精度の高い製品の加工に不具合が生じる。When the metal plate with residual strain is removed, if a part of the metal plate is removed, the balance inside the metal plate will be broken and the whole will be deformed,
Problems occur in processing of highly accurate products.
従来一般的に知られている金属板の残留歪評価方法
は、エッチング等により金属板表面を除去することで金
属板内部のつり合いが破れて発生する、ねじれ、そりな
どの形状変化や、金属板を短冊状に切断することで発生
する各短冊のそりなどの形状変化を測定する方法、また
局部的に評価する方法として、金属板にＸ線を照射し、
その反射の変化により金属格子面間距離の変化を測定
し、歪を評価する方法があった。Conventionally known methods for evaluating the residual strain of a metal plate include a change in shape such as torsion and warping, which occurs when the surface inside the metal plate is broken by removing the surface of the metal plate by etching or the like. As a method of measuring shape changes such as warpage of each strip generated by cutting into strips, and as a method of locally evaluating, a metal plate is irradiated with X-rays,
There is a method of measuring a change in the distance between metal lattice planes based on a change in the reflection and evaluating a distortion.
残留歪の評価方法は、その特性上測定が困難であるた
め、比較評価を行っている。従来法であるエッチング
法、切断法等においても、比較評価である。例えば、エ
ッチング法では金属板の表面を層状に除去していき、残
った部分の曲率あるいはねじり率を測定し、他の評価試
験片とその測定値を比較することで残留歪を評価してい
る。このような方法は、結果を出力するまでに長時間を
要し、評価効率が悪いという問題点が合った。また、上
記方法では、破壊検査となるため同一の評価試験片にお
いて再度繰返し評価を行なうことができないという問題
点もあった。Ｘ線照射法は、測定技術に熟練を要すると
いう問題点があった。The evaluation method of the residual strain is comparatively evaluated because measurement is difficult due to its characteristics. Comparative evaluation is also performed in the conventional etching method, cutting method, and the like. For example, in the etching method, the surface of the metal plate is removed in layers, the curvature or torsion of the remaining portion is measured, and the residual strain is evaluated by comparing the measured value with other evaluation test pieces. . Such a method has a problem that it takes a long time to output a result, and the evaluation efficiency is poor. In addition, in the above method, there is a problem in that the same evaluation test piece cannot be repeatedly evaluated again because of the destructive inspection. The X-ray irradiation method has a problem that the measurement technique requires skill.
本発明の目的は、金属の残留歪評価方法において、評
価効率を向上した上、繰り返して評価を行なえ、かつ信
頼性の高い簡易的方法を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and highly reliable method for evaluating the residual strain of a metal, in which the evaluation efficiency is improved and the evaluation can be repeatedly performed.
本発明者らは、前記目的を達成するために種々検討し
た結果、金属板に発生する残留歪の相違により、金属板
に振動を与えたときの振動周波数分布が異なるという現
象を知見し、本発明を完成するに到った。The present inventors have conducted various studies in order to achieve the above object, and as a result, have found a phenomenon that a vibration frequency distribution when a metal plate is vibrated is different due to a difference in residual strain generated in the metal plate. The invention has been completed.
すなわち、本発明は金属板を振動させることにより発
生する振動周波数の成分量により残留歪を評価すること
を特徴とする金属板残留歪評価試験方法である。That is, the present invention is a metal plate residual strain evaluation test method characterized by evaluating residual strain based on the amount of vibration frequency components generated by vibrating a metal plate.
本発明の具体的態様としては、人力または装置機構に
より強制振動を与えた金属板片の周波数を振動センサに
より検出し、アナライザを用い、分析・評価するもので
ある。As a specific embodiment of the present invention, the frequency of a metal plate piece subjected to forced vibration by human power or an apparatus mechanism is detected by a vibration sensor, and is analyzed and evaluated using an analyzer.
本発明によると、従来法では数時間から数日を要して
いた評価時間を数秒に短縮することができ、評価効率の
向上を図れる。また、金属板片に傷をつけたり、腐食を
施したりしないため、再評価を繰り返し行なうことがで
き、信頼性の高い評価を行なうことができる。さらに、
アナライザを用いた分析・評価のため、評価の判定がグ
ラフによって読み取ることができ、簡潔明瞭な評価がで
きる。According to the present invention, the evaluation time, which required several hours to several days in the conventional method, can be reduced to several seconds, and the evaluation efficiency can be improved. In addition, since the metal plate piece is not damaged or corroded, re-evaluation can be repeated, and highly reliable evaluation can be performed. further,
Because of the analysis and evaluation using an analyzer, the judgment of evaluation can be read by a graph, and concise and clear evaluation can be performed.
以下本発明を実施例に基づき説明する。 Hereinafter, the present invention will be described based on examples.
第１図に本評価方法の全構成を示す。鋼板片１（0.25
t×70w）の一端に振動センサ２を取付け、手または治具
で固定し、鋼板片１を振動させる。振動センサ２によ
り、鋼板片１の振動周波数を測定し、センサコントロー
ラ３およびアナライザ４により周波数を分析し、周波数
を成分表示するものである。FIG. 1 shows the entire configuration of the present evaluation method. Steel sheet piece 1 (0.25
t × 70 w), a vibration sensor 2 is attached to one end and fixed with a hand or a jig, and the steel sheet piece 1 is vibrated. The vibration frequency of the steel plate piece 1 is measured by the vibration sensor 2, the frequency is analyzed by the sensor controller 3 and the analyzer 4, and the frequency is displayed as a component.
第２図に分析結果を示す。 FIG. 2 shows the analysis results.
第２図中、（ａ−１）、（ｂ−１）、（ｃ−１）、
（ｄ−１）はそれぞれ残留歪の異なる４種の鋼板片の40
0msにおける振動データを取り込み周波数分析した結果
であり、100Hz〜400Hzの総和をO.A.値として示してい
る。また（ａ−２）、（ｂ−２）、（ｃ−２）、（ｄ−
２）は、同様に200msにおける振動データを取り込み周
波数分析した結果であり、0.1kHz〜0.9kHzの総和をO.A.
値として示している。両者とも横軸に周波数、縦軸に電
圧実効値を示しており、各図とも32回のデータを取り込
み平均した結果を示している。In FIG. 2, (a-1), (b-1), (c-1),
(D-1) shows the results of 40 steel sheets of four types having different residual strains.
It is the result of taking in the vibration data at 0 ms and analyzing the frequency. The sum of 100 Hz to 400 Hz is shown as the OA value. Further, (a-2), (b-2), (c-2), (d-
2) is a result of similarly performing a frequency analysis by taking in vibration data at 200 ms.
It is shown as a value. In both cases, the horizontal axis shows the frequency and the vertical axis shows the effective voltage value, and each figure shows the result of fetching and averaging 32 data.
評価に用いた鋼板片は残留歪量の少ない順にＡ
（優）、Ｂ（良）、Ｃ（可）、Ｄ（不可）の４種であ
り、格子照射型モアレトボグラフィー方式（浮上り量を
示すモアレ干渉縞間隔100μｍで評価）による残留歪分
布図ではＡ、Ｂともにモアレ縞は示さず、Ｃではモアレ
縞が鋼板片の周辺部の一部に、またＤでは全体にわた
り、モアレ縞が出ている、という状態にあるものであ
る。The steel sheet pieces used for evaluation were A in order of decreasing residual strain.
Four types of (excellent), B (good), C (acceptable), and D (impossible), the residual strain distribution diagram by the grating irradiation type moire tomography method (evaluated at the interval of 100 μm of the moire interference fringes indicating the floating amount) In both cases, moiré fringes are not shown in both A and B, moiré fringes appear in a part of the periphery of the steel plate piece in C, and moiré fringes appear in the whole in D.
Ａ（優）ランクは、第２図（ａ−１）、（ａ−２）に
示しているが、低周波数側の成分がＢ〜Ｄに比較して少
なく、また、高周波数域の成分量を示すO.A.値の値も小
さい。同様に、Ｂ（良）ランク、Ｃ（可）ランク、Ｄ
（不可）ランクの結果を第２図（ｂ−１）、（ｂ−
２）、（ｃ−１）、（ｃ−２）、（ｄ−１）、（ｄ−
２）に示してあるが、Ｂ、Ｃ、Ｄの順に低周波数成分が
多くなり、また高周波数域を示すO.A.値も大きくなって
いるのがわかる。これらを比較することで金属板の残留
歪量の判定を行なうことができる。The A (excellent) rank is shown in FIGS. 2 (a-1) and 2 (a-2). The component on the low frequency side is smaller than that on B to D, and the component amount in the high frequency range. Is small. Similarly, B (good) rank, C (possible) rank, D
(Not possible) The results of the ranks are shown in FIG. 2 (b-1), (b-
2), (c-1), (c-2), (d-1), (d-
As shown in 2), it can be seen that the low frequency components increase in the order of B, C, and D, and the OA value indicating the high frequency range also increases. By comparing these, the residual strain amount of the metal plate can be determined.
本発明によれば、従来長時間を要していた残留歪の評
価を極短時間で行なえ、評価効率を大幅に向上し、さら
に評価試験を繰り返すことで信頼性の高い評価を達成で
きる。ADVANTAGE OF THE INVENTION According to this invention, the evaluation of the residual strain which took a long time conventionally can be performed in an extremely short time, the evaluation efficiency is greatly improved, and a highly reliable evaluation can be achieved by repeating the evaluation test.
第１図は本発明にかかる試験装置の一実施例を示す構成
図、第２図は本発明による試験結果の一例を示す図であ
る。 1:鋼板片、2:振動センサ、3:センサコントローラ、4:ア
ナライザ、5:対向片FIG. 1 is a block diagram showing an embodiment of a test apparatus according to the present invention, and FIG. 2 is a view showing an example of a test result according to the present invention. 1: steel plate piece, 2: vibration sensor, 3: sensor controller, 4: analyzer, 5: facing piece
Claims (2)
動周波数の成分量により残留歪を評価することを特徴と
する金属板残留歪評価試験方法。1. A test method for evaluating residual strain of a metal plate, wherein the residual strain is evaluated based on a component of a vibration frequency generated by vibrating the metal plate.
ンサにより検出し、検出した周波数をアナライザを用い
分析・評価する特許請求の範囲第１項記載の金属板残留
歪評価試験方法。2. The method according to claim 1, wherein a frequency of the metal plate subjected to the forced vibration is detected by a vibration sensor, and the detected frequency is analyzed and evaluated using an analyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62225890A JP2655846B2 (en) | 1987-09-09 | 1987-09-09 | Metal plate residual strain evaluation test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62225890A JP2655846B2 (en) | 1987-09-09 | 1987-09-09 | Metal plate residual strain evaluation test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6468628A JPS6468628A (en) | 1989-03-14 |
| JP2655846B2 true JP2655846B2 (en) | 1997-09-24 |
Family
ID=16836476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62225890A Expired - Lifetime JP2655846B2 (en) | 1987-09-09 | 1987-09-09 | Metal plate residual strain evaluation test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2655846B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3673777B2 (en) * | 2001-08-21 | 2005-07-20 | キヤノン株式会社 | Signal output device, sheet material type discrimination device, and image forming device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58174845A (en) * | 1982-04-07 | 1983-10-13 | Mitsubishi Electric Corp | Method of diagnosing insulation of insulated coil |
| JPH0616030B2 (en) * | 1986-06-12 | 1994-03-02 | 日本電信電話株式会社 | Method and apparatus for diagnosing deterioration of article |
| JPS63186122A (en) * | 1987-01-28 | 1988-08-01 | Power Reactor & Nuclear Fuel Dev Corp | Abnormality diagnosing system for structure |
-
1987
- 1987-09-09 JP JP62225890A patent/JP2655846B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6468628A (en) | 1989-03-14 |
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