| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate a superior press forming by compensating a variation of material characteristic and an environmental variation during forming. <P>SOLUTION: The press forming apparatus comprises; a material characteristic input means for inputting at least one material characteristic among material thickness, yield stress, 0.2% proof stress, tensile strength, elongation, n-value, r-value, stress-strain relational formula, hardness, temperature, surface roughness, friction coefficient and lubricant film thickness; a state quantity detection means for measuring at least one state quantity among punch reaction force during forming, metal die temperature, strain quantity of metal die, deformation quantity of material being formed and temperature of material being formed; a forming condition calculation means for calculating at least one forming condition among forming speed, blank holder force and metal die temperature, based on the material characteristics put in by the material characteristic input means and the state quantities during forming measured by the state quantity detection means; and a forming condition control means for controlling at least one among moving speed of punch or die, temperature and blank holder force, based on the forming conditions calculated by the forming condition calculation means. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
