How to choose a welding machine for home and garden – expert reviews

With the need to weld two dissimilar metals early or each of us is late. You can trust this process. professionals providing such services, but you can buy welding machine and perform all necessary work by yourself. Features to consider when choosing a welding machine, a great many – here is the source power supply, converter operating principle, input and output tension, as well as many other features, and all of them in front of purchase you need to pay close attention. However, about everything in order.

welding machine selection

The best manufacturers of welding machines – which company choose

Regardless of whether you use a welding machine daily or the need for it arises from time to time, preference should be given to products of well-known manufacturers, which are a kind of trendsetters on this market:

  1. Daewoo

  2. Aurora

  3. Dewatt

  4. Hitachi

  5. Bosch

  6. Fronius

The products of the above concerns use a great many people around the world, they know and value her, professionals trust her welding business. Selecting a specific model from the data assortment manufacturers, as well as having studied customer reviews to work with this or that welding machine, you get in your order proven device that will be in good faith fulfill your own characteristics for a long time time.

The principle of operation and the device of the welding machine

Despite the differences in appearance and in their own characteristics, the principle of operation of welding machines practically always the same. The active element of it is electric an arc having a temperature of more than five thousand degrees. She arises as a result of the interaction of the welding electrode and the welded surfaces, resulting in a fusion of the edges and creation of a new strong crystal lattice of metal.

In order to weld two metals, to them connect the mass (negative wire). The positive wire is connected to electrode holder, resulting in during the implementation the welding process inevitably arises an electric arc. Melting both metal surfaces and adding special welding there additives formed by melting the electrode, the welder performs new, neat and durable metal seam.

Any welding machine consists of the following main components:

  1. Powerful double winding transformer;

  2. Diode bridge and a set of chokes, capacitors and others structural elements;

  3. Console of management of current and voltage;

  4. Connecting wires;

  5. Special clamps for fixing the positive and negative wires

In order to get a high-quality seam, to passing in Welding currents have special requirements. Firstly he must have a high frequency, power and at the same time low voltage. For this purpose, a transformer is used that converts incoming AC current and correcting its parameters before moment until they become suitable for work.

Types of welding machines

Welding transformers

Welding

Devices whose type is fully consistent with the above. Suitable for welding a variety of types of steel and allow to obtain high-quality and durable seam. Transformer Type Devices belong to the cheapest, a similar principle of operation can be found as among portable models designed for household application, and among professional industrial models. The latter differ in significant dimensions and weight.

Advantages

  • Low price;

  • A wide variety of models for every budget;

  • They give a high-quality and durable seam;

  • Allow to weld steel with any characteristics;

disadvantages

  • Noisy work;

  • Poor quality welding of cast iron and alloy become;

Welding inverters

Welding inverters

Structurally, these devices are similar to their transformer analogues, but in their composition there are additional elements that significantly improve their characteristics. IN First of all, we are talking about a diode bridge, which is installed at the output of the secondary winding of the transformer and serves to rectification of electric current and its “cleaning”. Welding inverters can easily cope with work of any complexity, including including pretty jewelry, like creating solid plumbing systems. In addition, the output current having a high frequency, allows you to work not only with iron and steel, but also and with cast iron, providing decent welding quality.

Advantages

  • Compact size and light weight;

  • Power source – 220V household network;

  • Allows you to adjust the output current to any frequency;

  • Allow to achieve the highest quality and uniform seam;

  • Universal;

disadvantages

  • High price;

  • Costly repairs in case of breakdown;

  • Sophisticated design that increases the likelihood of device output out of service;

Semi-automatic welding machines

Semi-automatic welding machines

The device data device includes all components of the above classes, due to which the output current is obtained “clean”, has a minimum of interference sufficient for comfortable operation Amperage and low voltage. The difference here lies in the method of filing welding material and creating a gas cloud. Electrode here has the form of a thin rolled wire fed continuously at using a special device, so the welder has the ability to make a weld of almost any length. Gas is which is needed for welding, is fed through a special channel through nozzle located next to the electrode.

Advantages

  • Versatility – semiautomatic devices allow cooking as coarse metals, and work with thin body parts cars;

  • The resulting welds are easy to process;

  • The complete absence of slag during the execution of work;

  • The ability to receive a seam of arbitrarily large length;

  • High quality weld;

disadvantages

  • Cumbersome

  • High cost of welding wires

  • Quite expensive;

Welding machine selection parameters

welding machine selection criteria

Power supply

According to this parameter, all welding machines can be divided into two conditional categories – domestic and industrial. First designed to operate on 220V, the latter are three-phase models operating at a voltage of 380 volts. Itself by yourself, connect the three-phase device to a normal household outlet will not work.

Another parameter to pay attention to is operating voltage range in which uninterrupted operation is guaranteed the operation of the apparatus. If the package has the number 230-240V, this means that the device shows its characteristics only with stable voltage. Surges and voltage drops will affect it characteristics. Conversely, an indicator of 110-240V says no only that the device can work in both American and European networks, but also that he is not afraid of the strong voltage drawdowns.

Working current

The parameter that has the most direct effect on quality the resulting seam. The dependency here is this: the thicker weldable metals, the greater the current strength must be involved for a high-quality seam. In order to get into your universal device that allows you to weld as thin sheets of iron, and thick corners, pipes and channels, attention must be paid to an apparatus whose operating current range starts at 10-15 amperes and ends at around 250-300 amperes, and also has a mechanism for its step adjustment.

Power characteristics of the device

Declared power – a parameter that directly affects the ability operation of a device in certain conditions. IN currently on sale you can find devices whose power varies from 2 to 10-12 kW. You should not think that the higher – the better: the obviously powerful welding machine when working in old premises can provoke a constant protective equipment in the switchboard of the room, thereby not giving to do the work. In this case, it is necessary to use less powerful welding machines, whose power characteristics do not exceed the maximum that the protective equipment.

Diameter of Electrode Used

The dependence here is similar to the one described above regarding current. Than thicker metal – the larger the diameter the electrode is required in order to boil the seam high-quality. It is for this parameter that you can indirectly judge by the current characteristics of one or another welding machine, not even knowing its specific parameters. Here you can build on what kind of metal you have to work – the thinner it is, the thinner electrodes will have to to engage.

Output current characteristics

The secondary winding of the welding transformer is capable of generate several different types of current, which directly affects device performance and functionality:

  1. Transformer-type welding machines are capable of generating alternating current suitable for welding any metal items;

  2. Welding inverters also give out alternating current, however after passing the diode bridge and filtering it becomes cleaner, and its frequency – increases. This makes it possible to cook enough thick metals, and also positively affects the quality weld;

  3. Devices generating direct current or combined options are the most functional, allowing you to cook not not only cast iron and alloy steel, but also stainless steel, not worsening its performance;

Duty Cycle Features

Parameter that displays the ability of a welding apparatus to operate at maximum power. Due to technical features, the welding machine tends to heat up, due to which its characteristics are significantly deteriorating. Parameter referred to as as a duty cycle, displays the amount of time that the welding the device can work in full cycle mode and at maximum power. For example, if this parameter is declared by the manufacturer like 70%, which means that out of ten minutes of continuous work The welding machine is capable of operating at a maximum power of seven. The remaining time, the power is increased mechanically in order to prevent overheating and failure of the device.

Which welding machine to choose

which welding machine to choose

  1. For those who are looking for a welding machine to perform plumbing operations and welding of plumbing and sewer pipes, it is best to pay attention to the welding inverter, capable of delivering currents up to 200 Amperes and working in current range of 150-250 volts.

  2. Those who choose welding for car repair are best buy a semiautomatic welding machine that allows you to work with wire 0.8-1 mm thick, emitting current up to 400 Amperes and working in range from 150 to 250 volts in voltage. An important role is played by work cycle – it should reach 90-100 percent for to prevent the device from shutting down deliberately at run time seam;

  3. For normal work with metals in a personal plot or cottage quite inexpensive transformer device, working from a household network 220V and capable of generating current up to 200-250 Amps;

  4. Thick-walled devices, boilers and heat exchangers require welder using powerful inverter welding machines, operating from a single-phase or three-phase network (it all depends on specific connection point and power source) capable of generate current up to 400A. The power of the device should also be consistent – almost all similar models reach 7-8 kW.

How much is the welding machine

  1. A quality inverter can be bought at a price of 6 to 15 thousand rubles. Powerful thick metal models more expensive – their cost can reach 40-50 thousand rubles;

  2. Semiautomatic welding machines are much more expensive. To those who plan do auto repair, you must have in your pocket from 16 to 150 thousand rubles for a high-quality semiautomatic device;

  3. Compact transformers for domestic use that you can call universal, quite affordable for every customer – price for the most expensive devices does not exceed 5 thousand rubles;

In the following articles, our experts tell you how to choose saw blade, secrets of choosing a mask for welding and features of choice laser level.

Welding machine selection video


Attention! This material is subjective opinion of the authors of the project and is not a buying guide.

Rate article
An online magazine about style, fashion, etiquette, lifestyle, and about choosing the best products and services.
Add a comment