A centrally located ridge on the upper roll tools of the fin pass section of a tube mill designed to extend into the gap between the edges of the strip. This ridge may be part of the upper roll tool or more generally a separate piece of tool steel. The purpose of the fin blade is to set the size of the opening and angle of the edges of the strip in preparation for welding.
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From the Web: Steel making, fabricating have changed; mfg & politics; 3-D printing semi-solid metals - by Vicki Bell Highlights for fabricators from the past week’s Web articles— AISC VP sets the record straight about today’s steel production; what skills today’s factory workers need; manufacturing and politics, and developments in 3-D printing.
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