Why does the argon arc welding machine burn the black stick?
Why does the argon arc welding machine burn the black stick?:1: gas has problems. Impurity, air, air leak.2: there is a problem with tungsten bar. The quality is poor and the diameter is too small.The 3: machine has problems. The rectifier is burned and has a reverse discharge.4: earthing wire is connected.5 、 large current selection,6, tungsten needle from the dissolution pool too close to the loss,7, select the appropriate current, suitable diameter tungsten needle, the operation of the tip of the hour from the dissolution pool position.
The current selection is large, the tungsten needle is too close to the dissolution bath, and the suitable current is selected. The tungsten needle with suitable diameter is operated with an hour head and a proper distance from the dissolving bath, and the speed is right
There are many reasons for tungsten burning:1, check and between tungsten argon arc welding torch position: clearance clamping with the clamping seat or between the gun body is too large, if it leads to poor conductivity, when in lighting, too close to the metal, the instantaneous current greatly, concentrated heat, not only will stick the needle, and will lead to loss; in addition, position is not correct, will lead to poor cooling, can also cause damage. So try to tighten the cap and check whether the tungsten electrode is reliably fixed. When purchasing, it is necessary to choose a closer clamping and clamping seat.2, check whether the standard AR (four 9 standard, namely the purity of argon must reach 99.99% or above), if the argon impure, cause of tungsten inadequate protection, easy burning; in addition to check whether the leak; one of the factors also affect the quality of tungsten.3, according to the welding machine AC and DC to correct wiring.(1) if it is a direct current welding machine, the ground wire is connected to the positive pole, the welding torch is connected to the negative pole; if the connection is reversed, the tungsten electrode is burnt out;(2) if AC and DC welding machines are used, the burning of tungsten will be more serious in the case of ac;
