Patent ID: 8826540

Claim:
A method for influencing a cut and functional face, including a reduction, of a fine-blanked finished part cut out of a metal strip, comprising: clamping the strip during closure between an upper part and a lower part, the upper part comprising a cutting punch and guide plate for the cutting punch, the lower part comprising a die plate and an ejector, and wherein a blank with said reduction to a preset value is cut out of the metal strip during a first working stage by cutting in a cutting direction; cutting the blank with a defined material allowance relative to a contour of the finished part at least in an area of the reduction; wherein size of said area of reduction is adjusted within the first working stage to a stipulated degree to a material volume that fills up, compensates or exceeds a volume deficit that occurs due to the reduction to the preset value; and subsequent to the first working stage, during a second working stage during which a forming process is performed, shifting said material volume in a direction opposite the cutting direction of the first working stage on the cutting line of the blank to fill said reduction at least in part; and wherein a size of the material allowance relative to the contour is defined before actual fine blanking starts as a function of a geometry of the finished part, a strength and type of the material, and a thickness of the finished part by means of a virtual fine blanking simulation, and as a function of a size of the material volume to be shifted by means of a virtual forming simulation.