| 摘要 |
PROBLEM TO BE SOLVED: To perform a bending at high efficiency and high accuracy by easily calculating a correcting D value, in the bending at a bending line which is different with an inclining angle of a work to the rolling direction. SOLUTION: To a blank giving information of the rolling direction in a specific lot material, the bending is performed and true material constants composed of n-th power work-hardening exponent n, plastic factor F and Young's modulus E, in respective bending lines BL1, BL2, BL3 different to the inclining angles to the above rolling direction, are calculated. The D value correcting calculation is performed based on the calculated true material constants (n, F, E), and since the corrected bending is performed to the respective bending lines, the bending is performed at high efficiency and high accuracy. COPYRIGHT: (C)2004,JPO&NCIPI
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