Welding

Also referred to as MIG (metal inert gas) welding, GMAW creates an arc with a solid wire fed through a MIG gun and melted to form a weld. This video guides students through the basics of gas metal arc welding, which is often used in automotive, structural, and production manufacturing. Helping students identify the correct duty cycle for the job at hand, the video explains the function and specifications of the electrode or "filler wire" as well as the other GMAW tool components. Safety, transfer modes, general setup procedures, laying and reading beads, and other topics are featured. A troubleshooting segment helps deal with problems like an erratic puddle, excessive spatter, porosity, poor penetration, and excessive penetration, with advanced GMAW techniques also explored. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).

GTAW is also known as TIG or tungsten inert gas welding, and uses a nonconsumable electrode to make high-quality welds on both ferrous and nonferrous metals. This video shows students how to properly and safely apply GTAW techniques. Pointing out tungsten's high melting temperature (the highest of any metal) and the general advantages of GTAW, the video explains AC or DC power source options as well as other system components, including the torch, foot switch, shielding gas, and ground clamp. Viewers learn how to select and prepare the right electrode (an AWS chart is illustrated), how to ensure safe working conditions, and how to set up the GTAW system for quality welds. An advanced segment covers joint types from butt to tee and helps troubleshoot problems like excessive tungsten wear, tungsten spitting, a porous weld, and an unstable arc. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).

"Preparing for a welding project usually involves cutting metal into specific shapes and pieces, a task that requires many of the same tools and know-how used in welding. This video serves as a basic guide to two popular heat-based cutting methods: oxy-fuel and plasma. Beginning with an overview of safety procedures, the video shows how to set up an oxyacetylene system and demonstrates correct coupling distance, travel speed, torch angle, machine finishing, and other aspects of handheld cutting. Additional fuel choices are listed, too. The plasma segment includes a basic definition of what plasma is and how it is able to cut. Viewers learn the fine points of setting up and cutting with a plasma system and are given numerous tips and guidelines, from one and two-hand torch manipulation to troubleshooting various problems. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act)"--Container.

"Gas Tungsten Arc Welding or TIG welding presents special safety concerns. Viewers are warned of the suffocation hazards present when working with inert gases and why good ventilation is required. The video also provides an explanation of how TIG welding differs from other types of welding...in particular the use of non-consumable electrodes. Electrode leads, hoses, regulators, and collets are demonstrated and explained as well as the use of the post flow timer to protect the weld from contamination. Also discussed are using the correct collet set and electrode size and type needed for the job." -- Producer's Web site