December 11, 2003
By: Paul Scott
Early power supplies for contact and induction welding for tube production, which were introduced in the 1950s, operated at 300 to 400 kHz. Modern power supplied, introduced in the 1990s, are variable from 200 to 400 kHz. While using any frequency in this range can produce acceptable welds for most applications, finite element analysis can be helpful for finding the optimal frequency for a particular gauge and material.
Norton NorZon® Plus depressed center wheels now utilize a proprietary blend of patented, newest generation Norton SG ceramic alumina and Norton BlueFire™ zirconia alumina abrasives, combined with a high performance bond system for significantly improved grain micro-fracturing. The upgraded line has also been expanded with Norton NorZon Plus Fast Cut™ Depressed Center Wheels, offering the fastest material removal in the industry.
From the Web: Blacksmithing, 3D printing, and an immigration nightmare stymies a shop’s growth - by Vicki Bell
Highlights for fabricators from the past week’s Web articles— Immigration nightmare stymies company’s growth/job creation; imagination an important tool in blacksmith’s arsenal; ultimate use of 3D printing; fabricator gives in many ways; and veterans trade combat helmets for welding helmets.
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