CN102998349A - Method for detecting adhesiveness of varnished wire paint film - Google Patents
Method for detecting adhesiveness of varnished wire paint film Download PDFInfo
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- CN102998349A CN102998349A CN2012105079171A CN201210507917A CN102998349A CN 102998349 A CN102998349 A CN 102998349A CN 2012105079171 A CN2012105079171 A CN 2012105079171A CN 201210507917 A CN201210507917 A CN 201210507917A CN 102998349 A CN102998349 A CN 102998349A
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Abstract
The method discloses a method for detecting adhesiveness of a varnished wire paint film. The method for detecting adhesiveness of the varnished wire paint film comprises the following steps of: taking large circle test samples which are different in length and wound in different diameters according to the size of the diameter of a varnished wire; dropping phenolphthalein alcohol solution indicators in salt water; placing the circle test samples into a phenolphthalein salt water solution, inserting a positive electrode bar, and connecting the negative electrode with one ends of the circle test samples; connecting a 12V direct-current power supply for 1 minute; checking that whether bubbling needle holes are generated in the circle test samples or not, and if not, the circle test samples are primary test qualified products; straightening the circle test samples which are checked out along the diameter direction; then winding into small-diameter circle test samples; placing the small circle test samples into a phenolphthalein salt water solution, inserting the positive electrode into the solution, and connecting the negative electrode with the circle test samples; and checking that whether bubbling needle holes are generated in the circle test samples or not after connecting a direct-current power supply for one minute, and if the number of the needle holes is smaller than two, the circle test samples are qualified products. According to the invention, the qualified test samples proved by the salt water needle hole test are additionally straightened and wound by round bars, and then are subjected to the salt water needle hole test to be tested again, so that the adhesiveness of the varnished wire paint film is detected intuitively, rapidly and accurately, and reliable quality of the varnished wire is guaranteed.
Description
Technical field
The present invention relates to enameled wire and detect, specifically the detection method of enameled wire coat tack.
Background technology
Enameled wire coat adhesion, be paint film stand to extend mechanical stress and do not occur visible cracking or with the combination property of free of conductors, reflected enameled wire outside Tensile, curling, bending or twisting etc. during acting force, its insulation course is cracking or lose the ability of tack not.The intrinsic flexibility of the tack of paint film and paint film is two kinds of performances that connect each other.Winding wire repeatedly is subject to crooked and elongation effect in coiling and forming process, if paint film and metal adhesion are bad, just cause easily breaking so that come off of paint film; The simultaneously plastic yield because of paint film and metal differs greatly, and when metal stretching surpasses the limit of elasticity of paint film, breaking will appear in paint film, and the tack of paint film is one of important quality index of enameled wire thus.
In the research technique that detects enameled wire " tack of paint film " performance, the experiment of pole coiling, tension test, tensile failure test, four tests of disbonded test are arranged, this pilot project end product, whether to ftracture or lose tack by the lens examination sample with certain multiple to judge, often be in state specious, that be difficult to draw a conclusion during judgement, there is limitation to a certain degree in the judgement of test findings.Therefore it is low to seek a kind of inspection cost, and test method that again can convenient, fast and accurate detection enameled wire coat tack seems to have very much practical significance to operation instruction and the application choice of enameled wire.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of enameled wire coat adhesion detection method, the paint film tack that the method can convenient, fast and accurate detection enameled wire.
The detection method of enameled wire coat tack may further comprise the steps:
(1) sampling with the above enameled wire of diameter 0.07mm, is got long 5～6m sample and is rolled into the circle sample that diameter is 200～400mm; Be the following enameled wire of 0.07mm with diameter, get long 1～1.5m sample and be rolled into the great circle sample that diameter is 100～200mm.
(2) be in the brine solution of 2～5g/L in concentration, splashing into an amount of concentration is 30～40g/L phenolphthalein alcoholic solution indicator, and the above-mentioned enameled wire that is rolled into the great circle sample is placed the brine solution that splashes into phenolphthalein alcoholic solution indicator;
(3) insert anode bar in above-mentioned testing liquid, negative pole connects an end of circle sample, and positive and negative terminal access 12V direct supply 1 minute checks whether the circle sample bubble pin hole occurs emitting, and free of pinholes is the preliminary examination specification product;
(4) the above-mentioned great circle sample that is up to the standards is stretching along diametric(al), then being wound into diameter is the small circle sample of 6～10mm;
(5) the above-mentioned circle sample that is wound into minor diameter is placed the brine solution that splashes into phenolphthalein alcoholic solution indicator, insert anode bar in the solution, negative pole connects an end of circle sample, positive and negative termination 12V direct supply checked that the small circle sample whether emits the bubble pin hole pin hole to occur and is certified products less than 2 after one minute.
Said method is that enameled wire is immersed in the salt solution, and behind the connection direct supply, if the enameled wire coat tack is bad, there is pin hole at paint film defective insulation place, and hydrone enters enameled wire from pin hole, forms charged saline electrolysis matter, and wherein hydrone is by electrolysis: H-2O
→ H2 ↑+2OH-, produce hydrogen gas bubbles, and OH-run into phenolphthalein indicator produce at pin hole red, if so enameled wire pin hole is arranged, emit bubble at paint film pin hole place, several bubble points that emit are arranged, several pin holes are just arranged, observe fast directly perceived.The present invention compares with existing Pinhole method, having increased the circle sample that the salt solution pin hole is up to the standards carries out after stretching and pole reels, carry out again the check of salt solution pin hole, have intuitively, fast, accurately detect the characteristics of enameled wire coat adhesion property, guarantee that quality of enamelled wire is reliable.
Description of drawings
Fig. 1 is enameled wire great circle electrolytic solution pinhole test synoptic diagram.
Fig. 2 is enameled wire small circle electrolytic solution pinhole test synoptic diagram.
Embodiment
The present invention will be further described below in conjunction with embodiment.
When (1) sampling, enameled wire are taken off from the enameled wire spool of good packaging, must not bear tension force or unnecessary bending.The enameled wire of the above specification of nominal diameter 0.07mm is got long 5m～6m sample; The enameled wire of nominal diameter 0.07mm and following provisions is got long 1m～1.5m sample.
(2) compound method of reagent is poured an amount of alcohol in measuring cup, add to make it dissolving after phenolphthalein fully stirs, and being mixed with concentration is 30～40g/L phenolphthalein alcoholic solution; In being the salt solution of 2～5g/L, concentration splashes into the phenolphthalein alcoholic solution indicator of an amount of above-mentioned configuration.For the accuracy of warranty test, visual and clear, should prepare fresh phenolphthalein salt solution every day.
When beginning to test, click and enter in the salt solution with the sample termination at every turn, see the color developing effect of salt solution, will again prepare phenolphthalein salt solution if color developing effect is bad; The sample termination can not be immersed in the salt solution for a long time, in order to avoid incarnadine salt solution, impact test next time.
(3) test procedure:
The enameled wire sample of the above specification of nominal diameter 0.07mm is bent to the annulus that diameter is 200mm～400mm; The enameled wire sample of nominal diameter 0.07mm and following provisions bends to the circle that diameter is 100 mm～200mm.
Solution connects positive pole during test, and the circle sample connects negative pole, applies the 12V DC voltage.Inspection applies behind the voltage pin hole whether occurs on the sample in the 1min, and free of pinholes is then carried out next step test.
From brine solution, take out through the above-mentioned first time and detect qualified great circle sample, rolling great circle sample is stretching along diametric(al), closely reel continuously at polished-barrel rod, pole with 1 circle/second～3 circles/second speed reel.Select the pole (seeing the following form) of different size according to the enameled wire diameter,
| The enameled wire nominal diameter | Diameter of the rod |
| 0.050~0.200mm | 6mm |
| 0.210~0.500mm | 8mm |
| 0.500mm above specification | 10mm |
Diameter of the rod 6mm～10mm, the tension force that line bears during coiling just make line contact with pole, should avoid line to be stretched and twisting.Pole is extracted out from the sample of winding, the circle sample is put into the salt solution that drips phenolphthalein indicator again test, solution connects positive pole during test, and sample connects negative pole, applies the 12V DC voltage.Inspection applies the pinhole number that produces on the circle sample in the 1min behind the voltage, and the upper pinhole numbers that produce of front two circles are not counted in.
Embodiment 1
As shown in Figure 1, comprise container, external power supply and electrode, fill the salt solution phenolphthalein solution in container, the positive electrode of external power supply immerses in the salt solution phenolphthalein solution, and the external power supply negative electrode connects circle sample one end.The salt solution phenolphthalein solution is to splash into the phenolphthalein alcoholic solution indicator that an amount of concentration is 30g/L in concentration is the salt solution of 2g/L.Employed adjustable external power supply is selected the 12V dc voltage power supply.
If pin hole is arranged on the enameled wire, electrolytic reaction will occur in the pin hole place so, 2H-2O → H2 ↑+2OH-, generate H2 and OH-, utilize the phenolphthalein reagent characteristic, meet alkaline OH-and redden.If pin hole is arranged, the pale red a fluid stream can appear in the solution around the sample, and simultaneously sample pin hole place's bubbling has the bubbling of several places, and several pin holes are namely arranged.
Be 180 level polyurethane enamelled wires of 0.210mm extracting nominal diameter, length 6m, the circle of coiled diameter 300mm turns to great circle.During detection, the rolling sample is immersed in the salt solution phenolphthalein solution, the solution socket power is anodal, and sample connects power cathode, applies the 12V DC voltage.Through 1min, observe whether the sample ambient color reddens in the salt solution, whether emit bubble on the record sample, if emit bubble, then the substandard product processing is classified in suggestion as.
In the situation that free of pinholes occurs in above-mentioned test detects, carry out next step test and detect.From brine solution, take out the circle sample, rolling circle sample is stretching along diametric(al), more stretching rear circle sample is wound on the polished-barrel rod that diameter is 8mm, be wound into small circle, pole is reeled with the speed of 2r/s.Extraction pole after the circle sample is reeled and finished, again the small circle sample is put into the salt solution phenolphthalein solution, the solution socket power is anodal, the circle sample connects power cathode, apply the 12V DC voltage, through 1min, observe whether the sample ambient color reddens in the salt solution, on the record sample bubbling of several places is arranged, several pin holes are namely arranged.Remove the upper pin hole that produces of front two circles of sample, pinhole number is specification product less than 2 enameled wire.
Embodiment 2.
As shown in Figure 1, comprise container, external power supply and electrode, fill the salt solution phenolphthalein solution in container, the positive electrode of external power supply is immersed in the salt solution phenolphthalein solution, and the external power supply negative electrode connects circle sample one end.The salt solution phenolphthalein solution is to splash into the phenolphthalein alcoholic solution indicator that an amount of concentration is 40g/L in concentration is the salt solution of 5g/L.Employed adjustable external power supply is selected the 12V dc voltage power supply.
If pin hole is arranged on the enameled wire, electrolytic reaction will occur in the pin hole place so, 2H-2O → H2 ↑+2OH-, generate H2 and OH-, utilize the phenolphthalein reagent characteristic, meet alkaline OH-and redden.If pin hole is arranged, the pale red a fluid stream can appear in the solution around the sample, and simultaneously sample pin hole place's bubbling has the bubbling of several places, and several pin holes are namely arranged.
Be the 155 level polyurethane enamelled wire enameled wires of 0.06mm extracting nominal diameter, length 1.5m, the circle of coiled diameter 100mm turns to great circle.During detection, the rolling sample is immersed in the salt solution phenolphthalein solution, the solution socket power is anodal, and sample connects power cathode, applies the 12V DC voltage.Through 1min, observe whether the sample ambient color reddens in the salt solution, whether emit bubble on the record sample, process if emit bubble then to advise classifying as substandard product.
As shown in Figure 2, in the situation that free of pinholes occurs in above-mentioned test detects, carry out next step test and detect.From brine solution, take out sample, rolling circle sample is stretching along diametric(al), stretching rear circle sample is wound on the polished-barrel rod that diameter is 6mm is wound into small circle again, pole is reeled with the speed of 3r/s.Extraction pole after the circle sample is reeled and finished, again the small circle sample is put into the salt solution phenolphthalein solution, the solution socket power is anodal, sample connects power cathode, apply the 12V DC voltage, through 1min, observe whether the sample ambient color reddens in the salt solution, on the record sample bubbling of several places is arranged, several pin holes are namely arranged.Remove the upper pin hole that produces of front two circles of sample, pinhole number is specification product for the enameled wire less than 2.
Claims (3)
1. the detection method of enameled wire coat tack, its feature may further comprise the steps:
(1) sampling with the above enameled wire of diameter 0.07mm, is got long 5～6m sample and is rolled into the circle sample that diameter is 200～400mm; Be the following enameled wire of 0.07mm with diameter, get long 1～1.5m sample and be rolled into the great circle sample that diameter is 100～200mm;
(2) be in the brine solution of 2～5g/L in concentration, splashing into an amount of concentration is 30～40g/L phenolphthalein alcoholic solution indicator, and the above-mentioned enameled wire that is rolled into the great circle sample is placed the brine solution that splashes into phenolphthalein alcoholic solution indicator;
(3) insert anode bar in above-mentioned testing liquid, negative pole connects an end of circle sample, and positive and negative terminal access 12V direct supply 1 minute checks whether the great circle sample bubble pin hole occurs emitting, and free of pinholes is the preliminary examination specification product;
(4) the above-mentioned great circle sample that is up to the standards is stretching along diametric(al), then being wound into diameter is the small circle sample of 6～10mm;
(5) the above-mentioned circle sample that is wound into minor diameter is placed the brine solution that splashes into phenolphthalein alcoholic solution indicator, insert anode bar in the solution, negative pole connects an end of circle sample, positive and negative termination 12V direct supply is after one minute, check that the small circle sample whether emits the bubble pin hole, pin hole is certified products less than 2.
2. the detection method of enameled wire coat tack according to claim 1 is characterized in that stretching along diametric(al) through the great circle sample that is up to the standards for the first time, and rolling is wrapped in 1～3 circle/second speed and is wound on the polished-barrel rod.
3. the detection method of enameled wire coat tack according to claim 2 is characterized in that described polished-barrel rod diameter selects respectively 6～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105079171A CN102998349A (en) | 2012-12-03 | 2012-12-03 | Method for detecting adhesiveness of varnished wire paint film |
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| CN2012105079171A CN102998349A (en) | 2012-12-03 | 2012-12-03 | Method for detecting adhesiveness of varnished wire paint film |
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| CN102998349A true CN102998349A (en) | 2013-03-27 |
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Cited By (6)
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| CN104649079A (en) * | 2015-02-02 | 2015-05-27 | 苏州圣利线缆有限公司 | Rolling mechanism with enamelled wire pin hole detection function |
| CN107154291A (en) * | 2017-04-17 | 2017-09-12 | 安徽旋利达电机有限公司 | A kind of motor enameled wire insulating layer detection means |
| CN109668878A (en) * | 2019-01-31 | 2019-04-23 | 优易电缆(张家港)有限公司 | A kind of enameled wire breakage test equipment and its test method |
| CN109932337A (en) * | 2017-12-18 | 2019-06-25 | 有研半导体材料有限公司 | A kind of device and method for evaluating silicon substrate back seal film compactness |
| CN112748032A (en) * | 2020-12-28 | 2021-05-04 | 松田电工（台山）有限公司 | Enameled wire wear resistance detection device and method |
| CN112798910A (en) * | 2020-12-29 | 2021-05-14 | 珠海格力电工有限公司 | Enameled wire breakdown voltage detection method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649079A (en) * | 2015-02-02 | 2015-05-27 | 苏州圣利线缆有限公司 | Rolling mechanism with enamelled wire pin hole detection function |
| CN104649079B (en) * | 2015-02-02 | 2017-03-29 | 东莞市联洲知识产权运营管理有限公司 | A kind of rolling-up mechanism with enamel-covered wire pinhole detection |
| CN107154291A (en) * | 2017-04-17 | 2017-09-12 | 安徽旋利达电机有限公司 | A kind of motor enameled wire insulating layer detection means |
| CN107154291B (en) * | 2017-04-17 | 2019-02-12 | 安徽旋利达电机有限公司 | A kind of motor enameled wire insulating layer detection device |
| CN109932337A (en) * | 2017-12-18 | 2019-06-25 | 有研半导体材料有限公司 | A kind of device and method for evaluating silicon substrate back seal film compactness |
| CN109932337B (en) * | 2017-12-18 | 2021-08-03 | 有研半导体硅材料股份公司 | Device and method for evaluating compactness of silicon-based back sealing film |
| CN109668878A (en) * | 2019-01-31 | 2019-04-23 | 优易电缆(张家港)有限公司 | A kind of enameled wire breakage test equipment and its test method |
| CN112748032A (en) * | 2020-12-28 | 2021-05-04 | 松田电工（台山）有限公司 | Enameled wire wear resistance detection device and method |
| CN112798910A (en) * | 2020-12-29 | 2021-05-14 | 珠海格力电工有限公司 | Enameled wire breakdown voltage detection method |
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Application publication date: 20130327 |