How Welding Machine Works? Working of Electric Welding Machine Explained with 3D Animation

How Welding Machine Works? Working of Electric Welding Machine Explained with 3D Animation  #weldingmachine #weldingmachine

Transcript

00:00The person who invented the electric welding machine was indeed a genius.

00:04But have you ever wondered why it doesn't electrocute people?

00:07This begins with understanding the working principle of the welding machine.

00:11The heart of the welding machine is the internal step-down transformer,

00:16which consists of two coils, the primary and the secondary,

00:20both wound around an iron core made of many thin iron sheets stacked together

00:25to reduce electromagnetic losses.

00:28When we energize the primary coil, it creates a strong magnetic field

00:32that induces a voltage in the secondary coil.

00:35According to the law of electromagnetic induction,

00:38which we learn in junior high school physics,

00:40the ratio of the primary voltage to the induced voltage

00:44is equal to the ratio of the number of turns in the primary coil

00:48to that in the secondary coil,

00:50and it is also equal to the ratio of the induced current to the primary current.

00:54By adjusting the number of turns in the coils,

00:57we can change the output voltage and current.

00:59The output voltage of an electric welding machine

01:02is typically between 30 and 36 volts,

01:05which is below the safe voltage threshold for the human body.

01:08Therefore, when a person comes into contact with the welding handle

01:12or the metal being welded,

01:13the current bypasses the human body,

01:16which has a higher resistance,

01:17and flows directly through the metal.

01:19This ensures that the person is not harmed by the electrode.

01:23The key to welding is the arc.

01:25If the welding rod is directly touching the metal,

01:28no arc will form

01:30because the current will flow straight through the metal.

01:33A certain gap must be maintained between the welding rod and the metal

01:37so that the electric current can ionize the air

01:40and generate a high-temperature arc.

01:42This temperature is typically above 6,000 degrees Celsius,

01:46which can melt the metal instantly to complete the weld.

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