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1. Different types

Welding machines can generally be divided into two types according to the type of output power supply. They are composed of a main transformer and required adjustment parts and indicating devices. It is a high-power transformer and is generally used in manual arc welding, submerged arc welding and tungsten arc weld. Welding and other methods. Its structure is very simple.

There are three main types of arc welding machines: moving iron core type, one-piece type and moving coil type. It has the advantages of simple structure, easy construction and repair, low cost and high efficiency. However, its current waveform is a sine wave and its output has AC drop characteristics. The arc stability is poor and the power factor is low. However, the magnetic blow phenomenon rarely occurs and the no-load loss is small. It is generally used in manual arc welding, submerged arc welding and Tungsten arc welding and other methods.

2. Different ways of utilization

The electric welding machine uses the high-temperature arc generated when the positive and negative electrodes are momentarily short-circuited during the welding process to melt the solder on the electrode and the material to be welded, so that the objects being contacted can be combined. It has the advantages of small no-load loss and high efficiency. But its current waveform is a sine wave.

The arc weld machine is also called an arc welding transformer. Its output has AC drop characteristics. The arc stability is poor and the power factor is low. However, the magnetic blow phenomenon rarely occurs. One is direct current. They use the principle of inductance. The inductance will produce huge voltage changes when it is turned on and off, and the cost is low. It turns the alternating current of the network voltage into a low-voltage alternating current suitable for arc weld.

3. Use different currents

The arc welding machine converts the alternating current of the network voltage into low-voltage alternating current suitable for arc welding, which is converted and ignited by the main transformer and the required regulating parts and indicating devices.

The electric welding machine uses the high-temperature arc generated when the positive and negative poles are momentarily short-circuited to melt the solder on the electrode and the material to be welded, so as to achieve the purpose of combining them. The structure of the welding machine is very simple. To put it bluntly, it is a high-power transformer that converts 220/380V AC power into a low-voltage, high-current power supply, which can be DC or AC.

Welding transformers have their own characteristics, which are the characteristics of sharp voltage drop. After the welding rod is ignited, the voltage drops. In the adjustment of the working voltage of the welding machine, in addition to the primary 220/380V voltage conversion, the secondary coil also has tap conversion voltage. At the same time, it is adjusted with an iron core. Adjustable iron core welding machines generally It is a high-power transformer.

It is made based on the principle of inductance. The inductance will produce huge voltage changes when it is turned on and off. It uses the high-voltage arc generated when the positive and negative poles are instantaneously short-circuited to melt the solder on the welding rod. to achieve the purpose of combining them. A voltage is applied between the welding rod and the workpiece, the arc is ignited by scratching or contact, and the energy of the arc is used to melt the welding rod and heat the base metal.