TPT January 2021

T E CHNOLOG Y

Guild International’s fast ME Zipwelder utilises latest pipe welding methods

THE Guild International ME Zipwelder is at the forefront of strip joining tech- nology and utilises the latest welding methods available including TIG, MIG, plasma and solid-state laser beams. The ME Zipwelder is used where fast, consistent, high quality welds are necessary on materials ranging from 0.006" to 0.750" thick, up to 60" wide. The ME Zipwelder is being utilised in a variety of strip processing lines in worldwide applications such as tube and pipe mills, roll forming, stamping, galvanising, slitting, and annealing and pickling lines. The hydraulic, double-cut shear allows both coil ends to be sheared simultaneously, reducing cycle time, while the design allows for automatic scrap evacuation and collection. Both coil ends are initially clamped, simultaneously sheared, then auto-

matically indexed to the proper welding position. Guild’s exclusive adjustable weld gap control permits the operator to pre-select the correct gap for the material being welded. The automatic, variable speed welding torch carriage is integrated into the clamp, guaranteeing accurate torch tracking with the weld seam. The ME Zipwelder can be customised to include both MIG and TIG welding capabilities on one machine, on-board weld bead milling,

The system utilises the latest welding methods available including TIG, MIG, plasma and solid-state laser beams

and semi- or fully-automatic operation to reduce operator involvement and increase mill up time. It is possible to save time and reduce costs while increasing worker safety with a Guild

ME Zipwelder on any strip processing line, the company said. Guild International www.guildint.com

Silicon Carbide Mosfet semiconductor technology leads to HFI welding evolution

AFTER 60 years in the HFI welding business, Emmedi has pioneered this revolutionary SiC semiconductor technology in a family of HFI Welders installed since 2016. The evolution is the use of SiC Silicon Carbide Mosfet semiconductor technology vs the traditional Si Silicon Mosfet and IGBT semiconductors. Semiconductors play the role of a switch that allows HFI power supplies to output at high frequencies, specifically within the range of 150 to 500kHz for API tube and pipe welding. The primary advantage is that the SiC semiconductor is significantly rated higher in voltage and current

at the high-frequencies required for HFI welding. To put this advancement into perspective, a typical HFI welder utilising the traditional Si technology semiconductors requires 64 devices for each 100KW in output power rating, the company said. The new SiC semiconductors accomplished the same 100KW output with only 4 SiC Mosfet semiconductors. Emmedi has produced a series of videos to show the latest SiC technology of its MosWeld SiC family of products, which are available on its website. Emmedi www.saetemmedi.com

The revolutionary SiC semiconductor technology from Emmedi

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JANUARY 2021

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