How it Works

Experts from the welding industry answer your questions and explain 'how it works'.

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How is Argon Used in MIG Welding and how do MIG and MAG Welding Differ?

The acronyms MIG (Metal Inert Gas), MAG (Metal Active Gas) and GMAW (Gas Metal Arc welding) all describe the same basic welding process. In this welding process, an arc is struck between a continuously fed consumable electrode and the workpiece as depicted in Figure 1. The consumable electrode is a bare wire. The heat generated by the arc melts the electrode and part of the base metal in the weld area. The arc itself transfers molten metal from the tip of the melting electrode to the workpiece, and here it combines with the melted base metal to form a weld deposit.

How do” Auto Darkening” welding helmets work and how dark should my welding helmet shade be?

Auto-darkening helmets, Figure 1, work basically by sensing the light from the arc and electronically activating a liquid crystal filter within the lens to darken to a preselected shade and protect the welders face and eyes from ultraviolet and infrared radiation (UV/IR).

What are the benefits of using the best welding helmets?

Welding helmets have changed over the past 40 years from the older standard helmets that use a fixed lens as shown Figure 1. These helmets came with two window or lens sizes, the flip front helmet with a 50mm X 100mm view and the larger viewing helmet with a 100mm X 125mm viewing window.

Why should someone consider welding as a career and how would one become a welder if they have no experience?

With the shortages of skilled welders, now is a perfect time to look at this industry for a future and a career. Actual “hands-on” welding is only one career path to take and there are many other routes to choose from. We can list these as welder, journeyman welder, welder fitter, welding operator, welding supervisor, welding technician, welding engineering technologist, welding inspector, welding metallurgist, welding engineer, welding teacher or professor, and an owner of welding manufacturing and fabrication operations.

Will welding jobs be replaced by robots or machines?

Today, in order to compete in the global marketplace, thousands of companies are embracing automation. Robotic costs have been declining over the past few decades and the smaller companies are starting to use automation to help them compete against the midsize and larger companies. These larger companies, such as those in the auto manufacturing industry, have been using automation and applying robotics for decades in order to reduce overall costs and compete with other automakers on the global stage.


The information provided is intended for general interest, to educate and inform our audience. The CWB and those providing feedback to the questions do not take any responsibility for any omissions or misstatements that could lead to incorrect applications or possible solutions that industry may be facing.