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Welding history

Classification of welding

Effect of welding speed

Welding defects

Types of welding joints

Welding position

Welding electrodes

Types of welding flame

Welding flux

Welding techniques

Welding symbol

Welding edge preparation

Advantages of welding joints

Thermal properties of metal

Welding safety

Types of welds



Arc Welding

Principle of Arc welding

Arc Welding Scemetic Diagram

In electric arc welding, the welding joint is produced by heating with electrical spark. It is only a electrical spark between electrode (wire/stick is used as filler metal to welding zone) tip and work piece(i.e the metal to be welded), otherwise it is nothing. It is also called fusion welding process. It is work in a closed electrical circuit in which current flows. If a small gap formed in the circuit then there an electrical spark is occurred, which is called electrical arc. In this spark or arc are contain a huge amount of temperature like 34000C-40000C. Due to this huge temperature, the weld metal can be fuse in arc welding process.

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Arc Welding