In the forging workshop, industrial furnaces smelt metals, including cupola, induction furnace, resistance furnace, electric arc furnace, vacuum furnace, open hearth furnace, crucible furnace, etc; There are sand mold drying furnace for baking sand mold, ferroalloy drying furnace and casting annealing furnace, etc; In the forging workshop, there are various heating furnaces for heating ingots or billets before forging and heat treatment furnaces for relieving stress after forging;

The most effective way for the failure of the medium frequency furnace is to use the low current experiment to judge whether it is the fault of the rectifier circuit or the fault of the inverter part. In the low current experiment, when the DC voltage is less than 513v, it indicates that there is a phase loss fault in the DC rectifier part. Check the specific thyristor fault, and the pulse breaking method should be used to judge whether it is the thyristor fault or there is no trigger pulse.

The most effective method for the failure of the intermediate frequency furnace is to use a small current experiment to judge whether the rectifier circuit is faulty or part of the inverter fault. When the DC current is less than 513 volts