| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve uniform heating of the whole of a non-rectangular blank with electrical heating technology. <P>SOLUTION: This uniform electrical heating device uses: an electrode pair group 50 for carrying current to the blank 1; a single power supply for supplying power to respective electrode pairs 1a1b to 8a8b; a gate means that opens/closes as a branch gateway of the current to each electrode pair from the power supply; and a gate opening/closing control means for controlling the opening/closing of the gate means according to a given current carrying condition. The electrode pair group 50 is arranged in a peripheral part of the blank 1 such that current carrying paths 11-18 of the respective electrode pairs that are current carrying paths each created on the blank 1 by each electrode pair do not individually cross each other, sequentially alternately supplies the power to each electrode pair by the gate opening/closing control means, sets the current carrying condition that the power supply is ended when the total amount of the supplied power has reached a target power value, and starts the power supply to the electrode pair group 1a1b to 8a8b. <P>COPYRIGHT: (C)2013,JPO&INPIT |
