Paint film cracking detection method of enamelled wire and detection apparatus

Abstract

The invention discloses a paint film cracking detection method of enamelled wire and detection apparatus. The method comprises step of: dipping enamelled wire to be detected to brine phenolphthalein solution and electrifying, observing whether the enamelled wire in the brine phenolphthalein solution appears red within 8s to 15s, if so, the enamelled wire is cracking; if not, the enamelled wire is not cracking; the detection apparatus comprises a container (1) and an electrode (2). The brine phenolphthalein solution (3) is held in the container (1). One end of the electrode (2) is dipped into the brine phenolphthalein solution (3) and the other end is connected with a debuggable external power (4); coiling sample (5) of the enamelled wire to be detected is dipped into the brine phenolphthalein solution (3) and is connected with the debuggable external power (4) in series. The invention can detect paint film cracking state of the enamelled wire completely and accurately and reduce eyestrain of the observer, which reduces labor intensity.

Description

technical field [0001] The invention relates to a paint film cracking detection method of an enameled wire, and also relates to a paint film cracking detection device of an enameled wire. Background technique [0002] When checking the flexibility index of ordinary enameled wire, it is generally to use a test rod of a certain specification to wind a certain number of turns to observe whether the surface paint film is cracked or whether there is a crack. The strict control method is usually to increase the magnification for observation. It not only increases the labor intensity of the inspection work, but also causes the eyes of the observer to be easily fatigued, and it is impossible to comprehensively and accurately determine the cracking state of the paint film. For example, it is impossible to judge whether the surface of the paint film wound into the interior is cracked. Contents of the invention [0003] The technical problem to be solved by the present invention is t...

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Problems solved by technology

[0002] When checking the flexibility index of ordinary enameled wire, it is generally to use a test rod of a certain specification to wind a certain number of turns to observe whether the surface paint film is cracked or whether there is a crack. The strict control method is usually to increase the magnification for observation. It not only increases the labor intensity of the inspection work, but also causes the eyes of the observer to be easily fatigued, and it is impossible to comprehensively and accurately determine the cracking state of the paint film. For example, it is impossible to judge whether the surface of the paint film wound into the interior is cracked

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