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Working principle of electric welding net machine

The circuit is closed, the whole closed circuit is equal and current; but all resistance but not the same, especially in the fixed contact resistance of the maximum resistance, called the contact resistance in physics. According to the thermal effect of the current law (also called Joule's law), Q=I^2 * Rt; the current is equal, the more the resistance of the parts of the heat is high, the welding resistance welding stigma, electric heating is produced in this region is the most, when the transverse diameter and longitudinal diameter of stigma pressure great release the heat at the same time, the diameter of longitudinal diameter of instantaneous dissolution of bond.

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