We create a semi-automatic welding machine with our own hands

Why create a self-welding semiautomatic machine? The fact is that this useful in the household will cost about 200 dollars. If we talk about aggregates of industrial type, then there are already amounts of more than $ 1000. Accordingly, not everyone can afford this device. If you dig a good deal on the Internet, you can find that the cheapest welding inverter semi-automatic costs about 13 thousand rubles. Also not impressive, is not it? So this is at least a minimum! Any 350th Jasic MIG is a minus 60 thousand rubles from your budget. In a word, in favor of the self-assembly of this device says a lot.

It's clear that we will not dwell in detail on the range of tasks that the described device allows to carry out, since once you decided to make a welding semi-automatic with your own hands, you certainly understand why it is needed. Let's rather focus on the main nodes that are part of it.

The most complex element is the mechanism that feeds the wire. On how much quality it will be made, depends on the supply of wire. It, in turn, affects the quality of welded seams. Many who managed to make a welding semi-automatic with their own hands, used to create this mechanism, a reducer from car wipers. In addition, you will also need an electric motor.

The second most important design node is the power transformer. Ideally, of course, it's better to use the ready one, but if this is impossible for some reason, you can rewind it yourself. What parameters of this device should I pay attention to first? This is the nominal output current (50 A) and the output voltage, which should be from 9 to 15 V. It is highly desirable that it can be adjusted by changing the transformation ratio. To this end, bends are created in the winding (primary). The distortion of the phases on the line during the application of the device can be avoided by using a three-phase transformer and a network.

It is known that a self-made welding semi-automatic performs its work with the use of direct current. After the transformer we need to straighten it. To achieve this, you need a rectifier, which consists of sufficiently powerful diodes. By the way, if the transformer is single-phase (characterized by the presence of two inputs) - it will take four diodes. If there are three outlets, then half as much. The use of a three-phase transformer implies the use of six diodes.

Of the remaining units, we can note the choke that is needed to improve the stability of arc combustion, the cut-off gas valve, the sleeve through which wire is fed, the starter switch.

A wide variety of current sources (permanent) are used to power the motor. The most accessible option is the rheostat, the transformer and the diode bridge. By the way, if you create a semi-automatic welding machine with your own hands, then it is best to place all these units in the body of the unit.