Selected articles from September 2010 issue published on TheFabricator.com:
Welding chrome-moly tube and pipe conventionally is done with shielded metal arc welding (SMAW) or submerged arc welding (SAW). Flux-cored arc welding (FCAW) has been tried, but the wires had some drawbacks that prevented widespread acceptance. Recent developments have reduced some of these disadvantages, so GMAW deserves a fresh look. The switch might lead to improvements in the weld's characteristics or welding productivity.
Cold sawing, widely used for cutting tubes, pipes, bars, and profiles for decades, has evolved steadily over time through advances in materials, coolants, coatings, tooth forms, and cemented carbides. However, new tube, pipe, bar, and profile materials are harder to cut than conventional materials, so some factors such as sawing speed and noise haven't improved much. A new machine and blade design has the potential to help fabricators substantially.
A tube bender can be considered a collection of power presses and, as such, it needs more than just a few conventional barriers between the operator and the machine. Safety mats, interlocked switches, emergency-stop switches, and interlocked side plates are a few of the safety devices available to machine tool manufacturers.
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