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What is the use of the thrust of the electric welder?
Dec 08, 2018

The role of the arc force (Arc Force) is to prevent the arc from being interrupted during the welding process. When the welding process, the current is declining, the compensation is automatically given, and the current is increased to avoid arc breaking. From a professional point of view, the hand arc welding machine will have a thrust; the hand arc welding power supply generally uses the lowering characteristic, and at the end of the lowering characteristic, an external towing characteristic----this external drag It is called the thrust size.

The role of thrust

Hand arc welding is actually a constant current source; in the case of hand arc welding short circuit, the output current is appropriately increased. The magnitude of this short circuit current can be called: thrust; its function: mainly to prevent the electrode from sticking to the workpiece; welding process In the welding droplet transfer, there will be a short-circuit transition phase; and increasing the current during the short-circuit transition can accelerate the short-circuit time; thus, it is not easy to stick to the electrode; the welder exhibits the hand-feeling effect of pushing the electrode outward; ----- So it is called "thrust"; the thrust is too small, it is easy to appear sticky electrode; the excessive thrust is easy to splash out of the welding droplet.

Second, the role of electric welding machine

The electric welder uses the high-temperature arc generated by the positive and negative poles in an instantaneous short circuit to melt the solder and the material to be welded on the electrode to achieve the purpose of combining them. The structure of the electric welder is very simple. To put it bluntly, it is a high-power transformer. The electric welding machine 20/380V AC is changed to a low voltage. The high-current power supply can be either DC or AC. The electric welding transformer has its own characteristics, which is characterized by a sharp drop in voltage. After the welding rod is ignited, the voltage drops. In addition to the 220/380V voltage conversion of the electric welding machine, the secondary coil also has a tap change voltage, and there is also an iron core to adjust. The adjustable iron core electric welding machine generally It is a high-power transformer, which is made by the principle of inductance. When the inductance is turned on and off, it will produce a huge voltage change. The high-voltage arc generated by the positive and negative poles in the short-circuit is used to melt the electrode. Solder. To achieve the purpose of combining them. A voltage is applied between the electrode and the workpiece, and the arc is ignited or contacted to ignite the electrode and heat the electrode with the energy of the arc.

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