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Getting the Most Out of Tandem GMAW

A new article by Marc PurslowEWI, Applications Engineer Tandem gas metal arc welding (GMAW) offers several advantages over single-wire GMAW – higher travel speeds, doubled deposition rates, and reduced heat inputs. So why have so few manufacturers implemented the technology? To download the article, click here. EWI is the leading engineering and technology organization in […]

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Tandem GMAW for Ship Structures

PROBLEM / OBJECTIVE Construction of Navy ships requires an extensive amount of out-of-position (horizontal, vertical, overhead) welding of high‑strength steel joints for units, blocks, and other major structures.  The majority of these erection joints are currently accomplished with gas metal arc welding (GMAW) and flux cored arc welding (FCAW) processes.  Travel speeds and deposition rates […]

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The Versatility of Tandem GMAW Provides Higher Productivity and Higher Performance

In the last 6 years, Brad Nagy, Steve Massey, and I have conducted a significant amount of research on  tandem gas metal arc welding (T-GMAW) and have been consistently impressed by the versatility of the process. Tandem GMAW combines two independently-controlled GMAW torches into a single welding torch with a common gas-shielding nozzle. The two electrodes are  in […]

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Increasing Productivity with Tandem GMAW

Welding travel speeds and deposition rates with tandem GMAW can typically be increased by a factor of 2-3 times those achievable with single wire GMAW procedures — productivity can be increased by up to 200%.

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Cool Tech: Tandem GMAW

Wind towers are composed of multiple sections which are fabricated in production facilities, then bolted together on-site.  Each section is comprised of several sub-sections joined together.  The sub-sections are made by rolling steel plate, then welding the longitudinal seam.  The sub-sections are then joined together via a circumferential seam weld.  Submerged arc welding (SAW) is […]

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Tandem GMAW can Double the Speed and Productivity

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New article: Getting The Most Out of Tandem Gas Metal Arc Welding

Tandem gas metal arc welding (GMAW) boasts a number of benefits over single-wire GMAW, including significantly higher travel speeds, doubled deposition rates, and reduced heat inputs; however, few manufacturers have taken full advantage of the process. EWI Applications Engineer Marc Purslow has written a paper that addresses many of the challenges commonly faced by manufacturers, discusses […]

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TANDEMONIUM!

Some combos just don’t work: texting and roller-skating, toaster pastries and hot sauce, or a $300 bottle of Chianti and orange soda. In these cases, the whole is clearly less than the sum of its parts. But, sometimes we find a combination that works so well, it seems as if it was meant to be. […]

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Dramatically improve your productivity with narrow groove welding – In Tandem

Over 17 years ago while working at John Deere, I got my first exposure to narrow groove welding.  A Japanese company was actually achieving sidewall penetration with a GMAW process using a mechanically “kinked-wire” method.  As you may know, a GMAW process relies on the heat of the arc to fuse metal.  Deep in a […]

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Welding Automation for Heavy Fabrication

More and more, robotic welding is becoming a viable option for use in heavy fabrication. The sophistication and capacity of modern robot systems is suitable for large structures which require multi-pass welds. Processes used for heavy fabrication such as preheating, gas metal arc welding (GMAW), flux cored arc welding (FCAW), tandem gas metal arc welding […]

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