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

Why create a semi-automatic welding machinehands? The fact is that this useful thing in the household will cost about $ 200. If we talk about industrial-type aggregates, then there are already amounts in excess of $ 1,000. Accordingly, not everyone can afford to buy this device. If you dig around the Internet well, you may find that the cheapest welding inverter semiautomatic device costs about 13 thousand rubles.

Not impressive either, is it?So it is still a minimum! Any 350th Jasic MIG is minus 60 thousand rubles from your budget. In short, a lot says in favor of self-assembly of the aforesaid device.

It is clear that we will not detail nowdwell on the range of tasks that the described device allows to perform, because as soon as you decide to make a welding semiautomatic device with your own hands, you probably understand why it is needed. Let's better focus on the main nodes that are part of it.

The most complex element is the mechanism thatfeeds the wire. The quality of the wire depends on how well it will be made. She, in turn, affects the quality of welds. Many who managed to make a semi-automatic welding machine with their own hands, used a gearbox from automobile wipers to create this mechanism. In addition, you will also need an electric motor.

The second most important construction node ispower transformer. Ideally, of course, it is better to use ready-made, but if this is for some reason impossible, then you can wind it yourself. What are the parameters of this device should pay attention in the first place? This is the rated output current (50 A) and the output voltage, which should be between 9 and 15 V. It is highly desirable that it can be adjusted by changing the transformation ratio. To this end, taps are created in the winding (primary). Phase skew on the line during the application of the device can be avoided if a three-phase transformer and network are used.

It is known that homemade semi-automatic weldingcarries out its work using dc. After the transformer, we need to straighten it. To achieve this goal, 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), four diodes are required. If there are three exits, then half. The use of a three-phase transformer involves the use of six diodes.

Of the remaining nodes, we can note the choke, which is necessary to increase the stability of the arc, the gas shut-off valve, the sleeve through which the wire is fed, the switch-on starter.

For powering the motor used the mostvarious current sources (constant). The most affordable option is a rheostat, a transformer and a 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 components in the unit case.