JPH0747732Y2 - Insulating film defect detection device for double-sided insulating coated steel sheet - Google Patents
Insulating film defect detection device for double-sided insulating coated steel sheetInfo
- Publication number
- JPH0747732Y2 JPH0747732Y2 JP1989117582U JP11758289U JPH0747732Y2 JP H0747732 Y2 JPH0747732 Y2 JP H0747732Y2 JP 1989117582 U JP1989117582 U JP 1989117582U JP 11758289 U JP11758289 U JP 11758289U JP H0747732 Y2 JPH0747732 Y2 JP H0747732Y2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- double
- coated steel
- sided
- insulating
- 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
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は両面絶縁被膜鋼板の絶縁被膜欠陥検出器に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an insulating film defect detector for a double-sided insulating coated steel sheet.
近年、鋼板の付加価値を高めるために、鋼板と他素材を
複合し、他素材の特性さらに兼備させた複合材料が製品
化されている。その中の一つに例えばフィルム、有機剤
コーティング、無機剤コーティング等を鋼板に接合ある
いは付着被覆させ、耐蝕性や絶縁性等を高めた両面絶縁
被膜鋼板がある。ところで、絶縁被膜にピンホール、局
所的破れ等の欠陥が存在すると鋼板が露呈することにな
り、腐食、絶縁不良あるいは外観不良等の問題を生じ
る。In recent years, in order to increase the added value of a steel sheet, a composite material in which a steel sheet and other materials are compounded and the characteristics of the other materials are further combined has been commercialized. One of them is a double-sided insulating coated steel sheet in which, for example, a film, an organic agent coating, an inorganic agent coating or the like is bonded to or adhered to a steel sheet to improve corrosion resistance and insulation. By the way, if there are defects such as pinholes and local tears in the insulating coating, the steel sheet is exposed, which causes problems such as corrosion, poor insulation and poor appearance.
かゝる問題をなくすには、被膜欠陥部を検出し、除去し
又その検出情報を絶縁被膜形成工程等にフィードバック
し、欠陥が生じないようにしなければならない。In order to eliminate such a problem, it is necessary to detect and remove the film defect portion and feed back the detected information to the insulating film forming step or the like to prevent the defect from occurring.
ピンホール検査としては、被検材に光を照射し透過光を
検出する装置（例えば特開昭59−73757号公報）がある
が、透過光は絶縁被膜の下に鋼板が存在するため透過し
ないという欠点を有している。また他の検査技術とし
て、被覆鋼管の絶縁被膜ピンホール検出装置がある。例
えば実開昭58−132864号公報のように、検知電極を被覆
鋼管内に装入し、該検知電極と被覆鋼管との間に流れる
電流を検出する絶縁破壊方式があるが、この方式を絶縁
被膜鋼板に適用した場合、電極が絶縁被膜に接触するた
め、絶縁被膜厚みが一般に数十ミクロンメートル程度と
薄い絶縁被膜鋼板では該被膜を破損する恐れがある。For pinhole inspection, there is a device that irradiates the test material with light and detects the transmitted light (for example, Japanese Patent Laid-Open No. 59-73757), but the transmitted light is not transmitted because the steel plate exists under the insulating coating. It has the drawback of As another inspection technique, there is an insulating film pinhole detection device for a coated steel pipe. For example, as in Japanese Utility Model Laid-Open No. 58-132864, there is a dielectric breakdown method in which a detection electrode is inserted into a coated steel pipe and the current flowing between the detection electrode and the coated steel pipe is detected. When applied to a coated steel sheet, the electrode comes into contact with the insulating coating, so that the insulating coating steel sheet having a thin thickness of about several tens of micrometers may damage the coating.
また両面絶縁被膜鋼板では絶縁被膜が両面に被覆されて
いるため、鋼板と電極間に電圧印加を安定的にでき難い
ことがある。Further, in the double-sided insulating coated steel sheet, the insulating coating is coated on both sides, so it may be difficult to stably apply a voltage between the steel sheet and the electrodes.
本考案は絶縁被膜に疵を加えることなく、また絶縁被膜
が鋼板両面に被覆された絶縁被膜鋼板に対して安定して
電圧印加ができ、また絶縁被膜欠陥検出が高い精度でな
される装置を目的とする。An object of the present invention is to provide an apparatus capable of stably applying a voltage to an insulating coated steel sheet in which the insulating coating is coated on both sides of the insulating coating without adding flaws to the insulating coating and detecting the insulating coating defects with high accuracy. And
本考案の要旨は、被検両面絶縁被膜鋼板を支持搬送する
ロールと、前記ロールに対向して被検両面絶縁被膜鋼板
から間隔をおいて設けられた電極と、被検絶縁被膜鋼板
の側端部に接触自在に設けた通電装置と、通電装置と電
極に電圧を印加する装置と、電圧印加時の鋼板と電極間
の放電電流を検出する検出器とからなることを特徴とす
る両面絶縁被膜鋼板の絶縁被膜欠陥検出装置にある。The gist of the present invention is to provide a roll for supporting and conveying a double-sided insulating coated steel sheet to be tested, an electrode facing the roll and spaced apart from the double-sided insulating coated steel sheet to be tested, and a side end of the steel sheet to be tested. Double-sided insulating film, characterized in that it comprises an energizing device provided so as to be freely contactable to the portion, a device for applying a voltage to the energizing device and the electrodes, and a detector for detecting the discharge current between the steel plate and the electrode when the voltage is applied. It is in the insulation film defect detection device of steel plate.
以下に、本考案について一実施例に基ずき図面を参照し
詳細に説明する。Hereinafter, the present invention will be described in detail with reference to the drawings based on an embodiment.
第１図において、１は被検両面絶縁被膜鋼板でその両面
に絶縁被膜２が形成されている。３は支持搬送ロールで
被検絶縁被膜鋼板１を矢印方向に搬送する。In FIG. 1, reference numeral 1 denotes a steel plate to be inspected for double-sided insulation, on which insulation coatings 2 are formed. Reference numeral 3 denotes a supporting / conveying roll, which conveys the insulating coated steel sheet 1 in the arrow direction.
４は電極で、支持搬送ロール３に対向し且つ被検両面絶
縁被膜鋼板１と微小な間隔をおいて設けられている。ま
た該電極４は移動装置５例えば油圧シリンダー、電動機
等に電極支持機枠６を介して連結され被検両面絶縁被膜
鋼板１との間隔は自在に調節される。この実施例では電
極４は被検両面絶縁被膜鋼板１の両面側に設けられてい
る。Reference numeral 4 denotes an electrode, which is opposed to the supporting and conveying roll 3 and is provided at a minute distance from the double-sided insulating coated steel sheet 1 to be tested. The electrode 4 is connected to a moving device 5, for example, a hydraulic cylinder, an electric motor or the like via an electrode supporting machine frame 6, and the distance between the electrode 4 and the double-sided insulating coated steel sheet 1 to be tested is freely adjusted. In this embodiment, the electrodes 4 are provided on both sides of the double-sided insulating coated steel sheet 1 to be tested.
７は被検両面絶縁被膜鋼板１への通電装置で、例えば縦
ロール、ブラシ等が用いられ鋼板１の側端面に当接して
いる。８は電圧印加装置で電極４と通電装置７とに電気
的に接続しており、通電装置７を介して被検両面絶縁被
膜鋼板１と電極４間に電圧を印加するものである。Reference numeral 7 denotes an energization device for the double-sided insulating coated steel sheet 1 to be inspected, which is in contact with the side end surface of the steel sheet 1 using, for example, a vertical roll or a brush. Reference numeral 8 denotes a voltage applying device which is electrically connected to the electrode 4 and the energizing device 7, and applies a voltage between the test double-sided insulating coated steel sheet 1 and the electrode 4 via the energizing device 7.
９は放電電流検出器である。いま、被検両面絶縁被膜鋼
板１の一方の絶縁被膜２にピンホール10が介在して、該
ピンホール10が鋼板１の走行により電極４下に来た場
合、電極４と被検両面絶縁被膜鋼板１間に空気を介して
直接電圧が印加された状態となり、印加電圧は空気中の
放電電圧より高くしていると放電が発生し電流が流れ
る。これを放電電流検出器９で検出する。Reference numeral 9 is a discharge current detector. Now, when the pinhole 10 intervenes in the one insulating film 2 of the steel plate 1 of the double-sided insulating coating film to be inspected and the pinhole 10 comes under the electrode 4 due to the traveling of the steel plate 1, the electrode 4 and the double-sided insulating coating film to be inspected A voltage is directly applied between the steel plates 1 through the air. If the applied voltage is higher than the discharge voltage in the air, discharge occurs and a current flows. This is detected by the discharge current detector 9.
而して、被検両面絶縁被膜鋼板１の側端部に通電装置７
を当接させ当該鋼板１への電圧印加が安定化するので、
絶縁被膜２のピンホール10や破れ等の欠陥検出が高精度
でなされる。Then, a current-carrying device 7 is attached to the side end portion of the double-sided insulating coated steel sheet 1 to be tested.
To stabilize the voltage application to the steel plate 1,
Defects such as pinholes 10 and breaks in the insulating film 2 can be detected with high accuracy.
本考案によると、絶縁被膜が両面に貼付されている被検
両面絶縁被膜鋼板に対して、被膜欠陥検出が確実になさ
れる。また被検両面絶縁被膜鋼板と電極は間隔をおいて
あるので絶縁被膜に疵を入れることがない。According to the present invention, the film defect detection can be reliably performed on the double-sided insulating coated steel sheet to be tested to which the insulating coating is attached on both sides. Further, since there is a gap between the steel plate to be inspected for double-sided insulation coating and the electrode, the insulation coating is not flawed.
第１図は本考案の一実施例を示す斜視図である。 １……被検両面絶縁被膜鋼板、２……絶縁被膜、３……
支持搬送ロール、４……電極、５……移動装置、６……
電極支持機枠、７……通電装置、８……電圧印加装置、
９……放電電流検出器、10……ピンホール。FIG. 1 is a perspective view showing an embodiment of the present invention. 1 ... Inspected double-sided insulating coated steel sheet, 2 ... Insulating coating, 3 ...
Supporting and transporting roll, 4 ... Electrode, 5 ... Moving device, 6 ...
Electrode support frame, 7 ... energizing device, 8 ... voltage applying device,
9: Discharge current detector, 10: Pinhole.
Claims (1)
ルと、前記ロールに対向して被検両面絶縁被膜鋼板から
間隔をおいて設けられた電極と、被検両面絶縁被膜鋼板
の側端部に接触自在に設けた通電装置と、通電装置と電
極に電圧を印加する装置と、電圧印加時の鋼板と電極間
の放電電流を検出する検出器とからなることを特徴とす
る両面絶縁被膜鋼板の絶縁被膜欠陥検出装置。1. A roll for supporting and transporting a double-sided insulating coated steel sheet to be tested, an electrode facing the roll and spaced from the double-sided insulating coated steel sheet to be tested, and a side end of the double-sided insulating coated steel sheet to be tested. Double-sided insulating film, characterized in that it comprises an energizing device provided so as to be freely contactable to the portion, a device for applying a voltage to the energizing device and the electrode, and a detector for detecting the discharge current between the steel plate and the electrode when the voltage is applied. Insulating film defect detection device for steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989117582U JPH0747732Y2 (en) | 1989-10-07 | 1989-10-07 | Insulating film defect detection device for double-sided insulating coated steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989117582U JPH0747732Y2 (en) | 1989-10-07 | 1989-10-07 | Insulating film defect detection device for double-sided insulating coated steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0357660U JPH0357660U (en) | 1991-06-04 |
| JPH0747732Y2 true JPH0747732Y2 (en) | 1995-11-01 |
Family
ID=31665796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989117582U Expired - Lifetime JPH0747732Y2 (en) | 1989-10-07 | 1989-10-07 | Insulating film defect detection device for double-sided insulating coated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0747732Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7238688B2 (en) * | 2018-09-26 | 2023-03-14 | 日本製鉄株式会社 | Iron loss measurement method and iron loss measurement system |
| JP7252466B2 (en) * | 2018-12-12 | 2023-04-05 | 日本製鉄株式会社 | Iron loss measurement method and iron loss measurement system |
| CN110794031B (en) * | 2019-11-13 | 2023-04-28 | 山东天海新材料工程有限公司 | Online leakage point detection device for geomembrane |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5948007B2 (en) * | 1976-06-30 | 1984-11-22 | 株式会社日本触媒 | Manufacturing method for finely colored resin with excellent light resistance |
| JPS544187A (en) * | 1977-06-13 | 1979-01-12 | Shinkou Denki Keisou Kk | Size distinguishing method of pin hole of insulator |
-
1989
- 1989-10-07 JP JP1989117582U patent/JPH0747732Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0357660U (en) | 1991-06-04 |
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