通用線圈退磁：
Universal coil demagnetization：
工件在磁粉探傷時(shí)將工件磁化；當(dāng)工件的長(zhǎng)軸與地磁方向一致并受到?jīng)_擊或振動(dòng)載荷時(shí)被地磁場(chǎng)磁化；工件磨削、電弧焊接、低頻加熱及強(qiáng)磁體接觸被磁化等。只有在個(gè)別情況下工件上的剩磁有用處，但在絕大多數(shù)情況下，其上的剩磁都是有害的，故進(jìn)行退磁，退磁就是將工件內(nèi)的剩磁減小到不妨礙使用的程度。
Magnetizing the workpiece during magnetic particle inspection; When the long axis of the workpiece coincides with the geomagnetic direction and is subjected to impact or vibration load, the workpiece is magnetized by the geomagnetic field; Workpiece grinding, arc welding, low frequency heating and magnetizing of strong magnet contact etc. The remanence on the workpiece is useful only in a few cases, but in most cases, the remanence on the workpiece is harmful, so demagnetization is to reduce the remanence in the workpiece to a level that does not hinder the use.
技術(shù)參數(shù)（Technical parameter）
移動(dòng)行程：1200mm;
Movement stroke: 1200mm;
輸入電壓：380V 50Hz；
Input voltage: 380V 50Hz
輸入電流：200A；
Input current: 200A
線圈截面：150-1100mm
Coil section: 150-1100mm
整機(jī)絕緣電阻大于2兆歐；
The insulation resistance of the whole machine is greater than 2 megohms.
退磁效果：工件退磁后剩磁不大于0.2mT；
Demagnetization effect: the remanence of the workpiece after demagnetization is not more than 0.2mT
