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What Is Electrode Welding?

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What is Electrode Welding?

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What is

Electrode Welding?

What is Electrode Welding?

Simple, Versatile, Effective

Electrode welding also known as manual arc welding, manual electrode welding, manual metal arc welding or shielded metal arc welding (SMAW) is usually the first welding process that welders are taught during training. It is easy to learn, but already offers insights into the way that welding systems work and into the ratio of metals to electrical voltage.

Welding with the rod electrode offers numerous advantages in comparison with MIG/MAG and TIG processes. In principle, almost all materials can be welded using electrode welding. The process is mainly used in steel and pipeline construction, but is also used in metal trade and industry. Manual metal arc welding allows for any type of weld seam and position, irrespective of whether this involves restricted or overhead positions, vertical up seams or vertical end welding. Furthermore, the welder is not dependent on shielding gases and can easily work outside, even in unfavorable weather conditions such as wind or rain.

Manual Metal Arc Welding: This Is How It Works

In electrode welding, contact between the rod electrode and workpiece ignites the arc. This creates a short circuit for a fraction of a second between the two poles, meaning that current can then flow. The arc burns between the workpiece and the electrode. This creates the required fusion heat. Via the consumable core wire and the coating, which is also consumable, the electrode also supplies the protective slag and the gas shroud.

Manual arc welding requires a low voltage and a high amperage. The welding system converts the available mains voltage into a significantly lower welding voltage. At the same time, it provides the required amperage, which also allows the power source to be adjusted and regulated.

What is Electrode Welding?

In manual metal arc welding, the amperage is the most important parameter for the quality of the connections. It must therefore remain as constant as possible, even if the arc length changes. In order to ensure this, power sources for electrode welding always have drooping characteristics.

Electrode Welding System Structure

(1) Main connection

(2) Power source

(3) Welding power-lead (electrode)

What is Electrode Welding?

(4) Grounding cable (workpiece)

(5) Electrode holder

(6) Earthing clamp

(7) Rod electrode

What is Electrode Welding?

(8) Workpiece

How is an Arc Created?

In order for an arc to be able to be created, the circuit between the electrode and the workpiece must be broken. During manual metal arc welding, this takes place via a contact or touch ignition. The welder guides the electrode to the workpiece, and this contact and the connection with the grounding cable forms a closed circuit. Raising the rod electrode breaks the circuit, a short circuit is created and the arc starts to burn.

Historic Milestones in Electrode Welding

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What is Electrode Welding?

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What is Electrode Welding?

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posting sourced from https://www.fronius.com/en/welding-technology/world-of-welding/electrode-welding

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