February 25, 2011
By: Seijiro Oshima
In deep drawing, if the contact angle between drawing stages is too large, cracks can appear and swelling can occur, resulting in scoring, curving, and imbalanced flange-lip roundness. Keeping the contact angle between 15 and 45 degrees is key to quality drawn parts.
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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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