Some FAQ about welded pipe welding

Release time:

2023-02-14

1.What is welding power supply? Weldingpower supply refers to the equipment with electrical characteristicssuitable for welding in the electric welding machine and provides theelectric energy required for welding, which is called welding powersupply.

1.What is welding power supply?

Weldingpower supply refers to the equipment with electrical characteristicssuitable for welding in the electric welding machine and provides theelectric energy required for welding, which is called welding powersupply.

2.When the arc length changes, the arc voltage will also change?

Answer:it is determined by the external characteristics of the arc weldingpower source. The longer the arc, the higher the arc voltage. Theshorter the arc, the lower the arc voltage.

3.In CO2 welding, when the extension length of welding wire changes,will the current display value change?

Answer:the longer the extension length of the welding wire, the greater theresistance of the welding wire and the greater the current heatconsumption. The smaller the welding current value, the smaller theactual welding current. Therefore, the elongation of the welding wireis generally set in the range of 12-20 mm.

4.What is the arc stiffness?

under the action of magneticcontraction and thermal contraction, the straightness of the arcalong the axial direction of the electrode is the arc stiffness.

5.What kind of welding will have arc bias blowing?

Answer:during welding, the arc center deviates from the electrode axis dueto the action of magnetic field, the interference of air flow or theinfluence of electrode eccentricity.

6.What is the direct connection method?

Answer:in DC arc welding, the welding machine is connected with the positivepole of the output end of the weldment, and the output end isconnected with the negative pole of the welding gun. This connectionis called "positive connection", also known as positivepolarity.

7.What is arc spot welding?

Answer:the lap joint of thin plate adopts MIG / MAG / TIG / CO2 weldingmethod. Within a certain time, the surface nugget is formed withwelding current to connect the upper and lower plates.

8.What is the lag time?

Answer:after the welding arc is extinguished, stop the gas supply afterdelaying the shielding gas for 0.3-5 seconds.

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