BLANK FORMING DEVICE USING ELECTRIC DIRECT HEATING AND METHOD OF MANUFACTURING A BLANK
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United States of America Patent
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Oct 27, 2017
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Sep 4, 2013
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Abstract
A method of manufacturing a blank which uses direct electric heating includes: pressing electrodes on both sides of the blank and heating the blank by applying current to the blank; hot-forming the heated blank; trimming the formed blank; and loading the trimmed blank. An apparatus for manufacturing the blank includes a pair of first electrode units on both surfaces of a side of the blank to press the surfaces, a pair of second electrode units on both surfaces of the other side of the blank, a pressing unit pressing the first electrode units or the second electrode units on the blank, a cooler cooling portions around the first electrode units or the second electrode units, and a power supply control unit heating the blank up to a predetermined temperature.
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