Articles & Podcast Episodes

An arc welder is a machine that uses electric current to produce an electric arc for welding. This arc melts the metal, forming a strong bond. When selecting equipment, prioritize safety, the welding type, and electrode specifications. Consult the American Welding Society for standards and choose quality materials to ensure excellent weld quality and performance. … Read more

Arc welding uses AC or DC power. To strike the arc, you need 70-100 V for AC and 50-60 V for DC. To maintain the arc, use 20-40 V. The current usually ranges from 50 to 1000 A, depending on the application and the type of electrode selected. Current, measured in amperes, influences the melting … Read more

{Voltage drop in arc welding is the reduction of voltage due to electrical resistance that limits current flow to the welding arc. This drop affects welding quality and efficiency. To achieve the best results, it’s important to understand and manage voltage drop, especially considering the distance between the electrode and workpiece.} Effective weld cable management … Read more

In arc welding, voltage refers to the electrical pressure that drives amperage through the welding circuit. It affects arc length; higher voltage results in a longer arc. This can lower stick-out and increase amperage. These changes impact weld quality and penetration. Balancing voltage and amperage is crucial for effective welding. Amperage, on the other hand, … Read more

Viva questions on arc welding cover various topics. Key areas include the types of arc welding methods, such as SMAW, GMAW, and GTAW. Questions often focus on safety devices like welding helmets. Candidates may also discuss filler materials and share their practical experiences in welding. Additionally, they may touch on electric arc furnaces and LASER … Read more

The Warning Welding Arc Label informs workers to use eye protection during welding. It has a self-adhesive backing for easy placement on different surfaces. Made from durable vinyl, it is resistant to abrasion, chemicals, and UV light. This label is essential for safety in industrial environments, helping to prevent serious injuries. These labels typically display … Read more

To safely watch a solar eclipse, use welding glasses with a shade level of 14 or higher. Auto darkening helmets may not offer enough protection as they respond to welding arcs, not sunlight. For the best eye protection, choose certified solar eclipse glasses. Follow expert recommendations for safe viewing methods. Before using the mask, inspect … Read more

Weld defects in shielded metal arc welding stem from incorrect amperage settings. Low amperage results in weak welds due to poor penetration and inadequate electrode melting. High amperage may cause excessive melting, leading to splatter and porosity. A consistent arc length is vital for ensuring strong, quality welds. Identification of these weld defects is essential … Read more

Vertical fillet arc welding connects two metal pieces at a vertical angle, typically 45 degrees or less. This process uses techniques like stick welding (SMAW) with a 7018 electrode. Proper joint preparation and puddle formation are crucial for quality. Explore welding courses for detailed guidance on groove and fillet welds. Technique refinement is crucial for … Read more

Vertical submerged arc welding (VSAW) is a technique that uses a continuous bare wire electrode to create an arc. This welding process is effective for joining vertical seams in storage tanks for oil, gas, and grain. VSAW delivers high-quality results efficiently, making it ideal for various welding applications in the industry. Operators benefit from reduced … Read more