welding machine

welding machine

WELDING MACHINE

As we know there are more than a hundred welding processes are being applied in today's era, and various type of welding machines are using for welding operation, in this series of welding equipment, we will discuss the different type of welding machines and thair description along with the concept of the power source.

POWER SOURCE

Although we used various sources of heat for fusion welding electric arc is an essential source today for heat generation. The arc welding process is the most common welding process in almost all welding processes, due to its various types of advantages. The arc welding process itself has a lot of welding process like SMAW (shielded metal Arc welding) GTAW(Gas Tungsten Arc welding) CAW (Carbon Arc welding) SAW (Submerged Arc welding) GMAW(Gas Metal Arc welding)/MIG PAW(plasma Arc welding) ASW(Arc Spot Welding) Electroslag welding Electrogas welding SW(Stud Arc Welding)and many modified versions of these also used electric power sources for getting required heat. these processes become popular day by day just because of the portability of arc welding processes equipment and availability in the international market. The other reasons are less space required, less noise possible to get high current for high enough heat especially for heavy thicker metals.
welding machine

TYPE OF POWER SOURCE USED IN ARC WELDING

Basically two types of Power sources used in the arc welding operation. AC (Alternating current) type and DC(Direct current)/rectifire type power source. To get the power source we use various types of machine lime combustion engines, Transformer type, invertors, and many other verities of welding machines. First, we look at the transformer type welding machines.

TRANSFORMER WELDING MACHINE

These types of welding machines usually used a transformer for getting required current and voltages. Transformer type machines are wildly used for both light work and heavy work as per current required. This type of machine can give around 600 Amp.current also that is required for heavy thickness metal welding.

TRANSFORMER

AC transformer type welding machines are the simplest welding machines as compare to other welding machines.
welding machine
there are two types of transformers are being used in the industry step up and step down .step up transformers are used to increase voltage and step down transformers always decrease voltage. For getting required current used specific wire gauge because wire thickness is responsible for the current and the turns of wire is responsible for voltage variations.

TRANSFORMER WORKING FUNCTION

Basically, Two coils are used in a simple transformer, called primary coil and secondary coil, as we can see in the drawing, between two coils used core which is prepared by specific metal. When AC current entered in primary coil its electrons run in hole coil, as a result, creates a magnetic field, the core is magnetized and the secondary coil gets energized due to the magnetic field, the core work as heat sync due to produced some heat by Eddy currents. To control the voltage range need to change the number of turns, for this purpose we use different tapping that is used as terminals for getting various voltage range.
welding machine

AC TRANSFORMERS WELDING MACHINE

There is two types of AC transformers machine being used, Air-cooled and oil-cooled Air-cooled machines are more popular due to its portability and suitable for light but when need high current Oil cooled welding machine is preferred.

DC Welding machine/Rectifier

Many A DC arc welding supply maybe with an AC transformer with silicon or selenium rectifier or DC generator driven by an AC moter.it may have an open-circuit voltage between 45 to 75 voltages and currents up to 600 Amps.which is suitable for heavy thickness metal weldings. Many other types of welding machine giving DC current may be employed storage batteries and rectifier tubes.

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