What is a welding machine

How does an electric welding machine work?

Electric welding is also known as manual arc welding and manual electric arc welding and is one of the oldest electric welding methods for metals.

Electric welding equipment

Electric welding devices work in such a way that an arc burns between the electrode and the workpiece, which supplies the energy required for the welding process. Due to the high temperature of the arc, the material is melted at the seam. At the same time, the electrode melts as a filler material, whereby the type of electrode used depends on which materials are to be connected to one another, the extent to which the electrode is stressed and which welding power source is used.

Electrode protects against oxidation

The electrode packaging shows which positions the electrode is suitable for, whether it works with direct or alternating current and how easy it is to work with. Nowadays the stick electrodes are usually covered, whereby when this covering melts, gases are generated which protect the arc and the seams from oxidation. Furthermore, slag is produced from the coating, which minimizes the surface tension and binds impurities.

This ensures that the welding points cool down more evenly and more slowly, so that there is less distortion of the material.

Welding process with electric welding devices

When welding with an electric welding device, the electrode is first clamped in a holder provided for this purpose and the arc is ignited by means of contact ignition, i.e. a short circuit by briefly tapping the electrode on the material or by means of high-frequency ignition. Then the torch is brought to the welding point. The melted materials flow into one another during the welding process and solidify after cooling, creating the weld seam. Electric welding machines work with direct or alternating current.

Welding power source for electric welding machines

So-called welding transformers, welding units or welding inverters serve as welding power sources. In electric welding, the rule applies that the thinner the material to be joined, the more complex the welding equipment is, since thinner metals would burn through due to high currents during welding. In electric welding, the electric arc burns between the melting electrode and the material.

Electric welding machines are used in all areas, from industry to home improvement, and for almost all types of metal.

Inverter welding machines

How does an electric welding machine work?

The very compact electric welding machines are relatively easy to use. Since no shielding gas is required when welding with these devices, it is possible to weld outdoors or in windy conditions. Inverter welding machines are also suitable for special electrodes and have particularly good welding properties. When welding with such devices, high frequencies ensure a very stable arc. For all electric welding devices, the electrodes must always be stored in a dry place and the temperature must not be fallen below when welding with an electric welding device.