Differences Between The Various Types Of Welding Machines

This is a brief study on the different types of welding systems currently in use and their differences in terms of costs, performance, and intended use.

Welding systems, more simply known as welding machines, can be of different types according to their operation. The applications of the different processes, in fact, are subordinated to different types of needs.

Oxyacetylene welding, for example, is a method in which the high temperature required for melting the metal is obtained through the combustion of a mixture of oxygen and acetylene; for this reason, the oxyacetylene welding machine is reduced to a mere torch with the regulator, to which the cylinder is connected with the fuel gas.

Tin soldering, on the other hand, is mainly practiced in electronics and requires small welding machines that require minimal installation power, but let’s go in order and try to examine in more detail the substantial differences between the various models currently on the market.

 

The oxyacetylene torch

The oxyacetylene welding machine, as mentioned before, is nothing more than a simple torch inside which oxygen and acetylene are mixed before being expelled from the nozzle, and can be at low or high pressure depending on the type of work to be done.

The torch was the most used welding system until the early 1900s when the first examples of electric welding machines were introduced; nowadays, therefore, it is used only in hydraulics for certain applications, such as brazing pipes and creating pipes and collars for example.

In general, on the other hand, torches are no longer used as welding systems but are used in demolition and recovery, for cutting sheets and pieces of thick metal, such as beams, hulls of decommissioned ships or armor plates, just to mention some applications.

A curiosity regarding oxyacetylene torches is that some of the smaller and cheaper models, therefore intended for hobby use, are actually also used in the kitchen by many chefs, who use them to caramelize the surfaces of desserts or for other types of preparations.

Another typical use of torches is that of laying the insulating sheaths on the roofs and attics; in this case, usually, propane or butane gas is used since the flame has the sole purpose of heating and dissolving the bituminous layer of the sheaths in order to make it adhere to the surface to be insulated.

Oxyacetylene torches for professional use are usually sold in kits with nozzles of different sizes and can have a cost ranging from about 90 to 150 euros, those for hobby use, however, have a price that varies from 10 to 90 euros depending on the chosen model.

 

Tin welders

The tin ones are the most requested by professionals and enthusiasts of electrical engineering, among all the different welding machines sold online (here are the best models ). In fact, these are special welding systems, designed to make precision and small-sized joints for the assembly of electronic components on the relative boards.

Also in this case there is a further differentiation of models within the category itself, ranging from the cheapest to the most expensive in a range from 10 to 100 euros and more, depending on the type and characteristics.

Unlike the torch, the soldering iron works on electricity but is characterized by a low installation power, from 30 to 80 Watts depending on the model, since the tin has a relatively low melting temperature.

Tin soldiers, as well as in electronics, are also used by electricians to perform repairs or installations of systems and control and distribution units; they are widely used in goldsmiths and jewelry, as well as in precision mechanics; in the hobby field, however, they are mainly used by DIY enthusiasts and for artistic applications, such as the creation of sculptures from old recycled metal materials.

 

Electric welding machines

 

The welding systems par excellence, on the other hand, are the electric ones, commonly known as arc welders as they exploit the heat generated by a voltaic arc triggered between the pieces to be welded. The electric welders, in turn, differ according to the welding process they are able to perform, which can be an electrode, bare or coated, or continuous wire, also this one with coating or not according to the case, with or without the aid of inert gas and so on. The category of electrical systems, therefore, includes an electrode, continuous wire, spot, and plasma welders.

Electrode welders are the most popular and used in the world, as they allow to join sheets, profiles, tubular or pieces of metal of any type but of reduced thickness; therefore they are suitable for a wide range of applications, from home renovation works to use in workshops. Furthermore, the relatively small size and weight of the electrode welding machines make them particularly suitable for outdoor use, therefore they are also widely used on construction sites.

As can be seen from the name, continuous wire welding machines use a wire instead of the electrode which is delivered continuously through the welding torch; they can weld thick metal pieces and the joints obtained are also better in terms of cleaning and resistance but, unlike electrode ones, they are much more difficult to use and require an expert operator.

Both types of welding machines, including hybrid models capable of operating with both electrode and continuous wire, can have a price ranging from 60 to 1,500 euros and more, depending on the economic range of belonging, the type, and destination of the ‘use.

Spot welders and plasma welders, on the other hand, are specific models that are mainly used in the industrial sector. The former, in fact, are designed as stationary machines that perform welding points on pieces placed in rapid sliding between the tips of the electrodes.

The plasma welder, on the other hand, is based on the same principle as the continuous wire welders, with the difference that the arc reaches very high temperatures, in the order of several tens of thousands of degrees, and is used both for welding and for cutting thick metal pieces.

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