ARC Welding

Arc welding started in the 19th century. In 1802, Vasily Petrov discovered the electric arc. In 1881, Auguste de Méritens developed the first arc welding method. Its significance grew in World War II for shipbuilding. Notable advancements include plasma arc welding, invented by Gage in 1957. In the early 1900s, the introduction of metal electrodes … Read more

Arc length in welding is the distance from the workpiece to the tungsten electrode tip. In TIG welding, this length affects heat generation needed for fusion. An arc forms from ionized gases between the electrode and the workpiece, impacting weld quality. Proper control of arc length is crucial for achieving effective results. Understanding the importance … Read more

Vertical up welding, known as the 3F technique, requires moving the electrode from bottom to top. Use a lower welding amperage of 120-130 amps. Keep the electrode angle straight and the arc tight. Practice the weave technique. Clean surfaces help reduce slag inclusion. Hands-on training is essential for improving skills in vertical fillet welds. Next, … Read more

Accidentally looking at a welding arc can cause “arc eye,” also known as welder’s flash. This condition happens due to UV radiation exposure, leading to corneal burn. Symptoms include pain, watering, and redness. Most cases heal without lasting damage, but it’s important to seek medical care for proper treatment and eye care. In addition to … Read more

Manual metal arc welding (MMA) is a welding process that creates an electric arc between a flux coated metal electrode and the work piece. The heat from the arc melts the electrode and the work piece, forming a strong weld. This method is also called shielded metal arc welding (SMAW) or stick welding. Common techniques … Read more

Submerged arc welding (SAW) is called ‘submerged’ because the welding arc and molten weld metal are hidden under a layer of flux. This flux, when it melts, becomes conductive. It allows electric current to travel from the electrode to the workpiece. This process creates a clean and efficient weld in the weld zone. SAW employs … Read more

For arc welding, select a lens shade number that indicates darkness. Shielded metal arc welding usually needs a minimum shade of 7. Depending on the electrode size and arc current, the appropriate shade can reach up to 14. Choose the shade based on the task to ensure optimal protection from light radiation. Welders often use … Read more

Looking at a welding arc can cause arc-eye, or welder’s flash. This condition arises from intense ultraviolet radiation, which inflames the cornea. Symptoms include pain, redness, and watery eyes. To prevent serious eye damage, always wear UV protection. If you experience these symptoms, consult an eye doctor promptly. Prolonged exposure can lead to more severe … Read more

Spray arc welding is a welding process that transfers molten material as small droplets, each smaller than the filler wire diameter. It maintains a stable arc and avoids short circuits, resulting in minimal spatter. This technique offers benefits like clean and precise welds, making it suitable for various applications. How spray arc welding works involves … Read more

A welding arc is an electrical discharge created during the arc welding process. It generates high heat that melts metals at the joint. As the metals cool, they solidify to form a strong connection. Arc welding is popular in construction, manufacturing, and repairs due to its effectiveness and strong joint strength. Safety measures are essential … Read more