A very convenient and practical equipment that is worth buying for home use is the inverter welding machine.Which is best for amateurs and for periodic repairs? The question is quite interesting. The choice of a welding unit is carried out according to several parameters, but first you need to understand how such equipment is arranged, and how it works.
Invertor equipment. Device and specifications
We are all used to the words of the welding machine to represent a huge box with a transformer in its device. It is this part of the equipment that is responsible for generating quite a large current, which puts it into operation and supports the welding arc. An inverter-type apparatus is capable of reproducing the same process, only in this embodiment the current is generated by the inverter.
Inverter equipment is much more complicated than outdated transformer models. In it, the mains current passes four stages of conversion:
- straightening, smoothing with a special filter;
- conversion of current into alternating current with a high frequency;
- voltage reduction with a parallel increase in current even up to 250A;
- current rectification.
For this, the equipment is equipped with a line filter, rectifiers and frequency converters. The high current values obtained at the output are capable of creating a rather powerful arc, which easily melts almost any metal.
Depending on the purpose, devices with different output current indicators are used. Usually they are divided into:
- low power (140-160 A);
- medium power (160-200 A);
- high power (200-250 A).
The first are the weakest, their use is reduced to the creation of small cosmetic seams and work with metal having a small thickness. Units of medium power are quite common, easily cope with large volumes and produce fairly high-quality connections. High-power can be attributed to professional equipment, they are used if welding of metal surfaces having a large thickness is required.
Power is a rather important indicator that you need to focus on when choosing equipment such as an inverter welding machine. Which is best for the home, of course, is up to the buyer, but it is worth focusing on other characteristics.
Useful advice! Work with the welding inverter is necessary only in a special mask. Powerful light rays can damage your eyesight.
Types of inverters by type of welding
Inverters are also divided by the type of welding conditions:
- manual welding arc (MMA);
- semiautomatic device (MIG / MAG);
- argon welding (TIG);
- plasma cutting (CUT).
For home use, equipment labeled MMA is perfect. This type of welding inverter is light in weight, but at the same time it is almost ideal for solving any domestic problems. It will require you to purchase the most common electrodes.
Semi-automatic welding machines are mainly used on a production scale and are completely unsuitable for home use. The power and dimensions of such equipment are much higher. The principle of its operation is to supply a special wire to the arc, as a result of which a weld is formed.
Welding with an argon-arc unit is a rather complicated process. Special tungsten electrodes are used for it, and the formation of an arc occurs when interacting with an inert gas. Such equipment is quite expensive and its use at home is simply impractical as well as the use of the following type of apparatus. Aggregates for plasma cutting, in fact, are not welding units, although they work approximately the same as the inverter welding machine. Which is better for home use is now more or less clear.
Additional functions of the welding inverter and its advantages
For beginners in the welding business, additional features that make work easier will be useful. Almost all inverters increase the current strength at the start of operation, resulting in a powerful starting arc. This is the so-called hot start feature. Its presence allows you to start work immediately after turning on the unit.
It’s good if the anti-stick function is provided on such a welding machine. The equipment automatically lowers the operating current the moment the electrode sets. After its separation, all parameters are restored. Another convenient feature is boosting the welding arc. It allows you to get a quality arc with minimal spatter of metal.
Useful advice! Often during the first experience with a welding machine it is not possible to create a good arc. To make it, you need to strike an electrode on the surface of the metal, as if with a match.
In addition to the fact that the inverter greatly facilitates welding, it can work with different electrodes. He copes with such materials as cast iron, stainless steel, non-ferrous metals.
Inverter welding machine. Which is better in technical terms?
Choosing an inverter apparatus, you need to pay attention to other, no less important parameters. A rather important indicator is the input voltage range. An ideal unit will be with a specified voltage of 170 to 250 V or with a tolerance of about 15%. The operation of such a device will not depend on the voltage drops in the network.
Duration of inclusion is usually indicated as a percentage. If the value of this indicator is 60%, then after 10 minutes of operation of the equipment, it will take about 4 minutes to rest. If this parameter is exceeded, the built-in protection will work and the device will turn off.
An equally important parameter is the diameter of the electrode. It is best to select a model that works with 4-5 mm electrodes. Their use allows you to create better seams while reducing voltage.
Useful advice! When purchasing a welding inverter, you also need to pay attention to the location of a service center nearby. In the event of a breakdown, specialists will quickly help to cope with the problem.
Verified Manufacturers and Models
The German company FUBAG has proven itself in the market of welding machines. Among its models, you can choose a unit of any power for both working at home and for professional welders. The ideal choice for the home is FUBAG IN 163. Such devices are insensitive to power surges, they allow you to create an even and beautiful seam without splashing metal drops. They are equipped with an effective ventilation system, I have built-in surge protection. It is very easy to use, equipped with the functions “quick start”, “anti-stick”, as well as “arc force”.
The Italian brand Telwin has long gained a reputation as a quality manufacturer. The work of inverters of this company is made from 220V. Distinctive features of Telwin units are light weight and compactness. The TELWIN FORCE 165 inverter has everything you need for a beginner, features that greatly simplify the work. Easily copes with power surges in the range of 15%. Such equipment consumes little electricity, has a reliable cooling system. Any type of electrode is suitable for it.
Good welding inverters are manufactured by ProfHelper. A whole line of units, called the Prestige, is in great demand. The Prestige 181S inverter is one of the common models. It is compact, it can be carried on the shoulder, which allows you to work even in hard to reach places. He is not afraid of power surges. The standard set of functions: “hot start”, “anti-sticking”, “forced arc” allows even a novice in the welding business to create high-quality, reliable seams.
If you plan to carry out any work on arranging metal structures yourself at home or in a suburban area, then by the way, by the way, there will be a purchase of equipment such as an inverter welding machine. Which is better – choose the buyer. After reading this article, you can not be afraid to make a mistake in choosing.