Feintool Intellectual Property Ag

Andreas Delis

Ukrich Schlatter

Gilbert Fuerer

Marc Schneeberger

The invention relates to a method and a device for influencing the cut and functional face, especially the reduction, during fine blanking of a finished part, for example, a gear, cut out of a metal strip, wherein the metal strip is clamped during closure between an upper part at least comprising a cutting punch and guide plate for the cutting punch and a lower part at least comprising a die plate and ejector and in a first working stage a blank with reduction is cut out of the metal strip. The invention has the task of providing a method and a device for purposefully influencing the cut and functional face, especially the reduction, during the production of finished parts, like gears, making it possible to purposefully influence or totally eliminate the edge reduction, while simultaneously maintaining the functional surfaces and saving material. This task is solved by cutting out the blank with a defined material allowance relative to the contour of the finished part, at least in the area of the reduction, the size of which within the first working stage is adjusted to a stipulated degree to a material volume that fills up, compensates or exceeds the volume deficit occurring due to the reduction to a preset value and by subsequently during a second working stage shifting this material volume in a forming process opposite the cutting direction of the first working stage on the cutting line of the blank to purposefully fill up the developed reduction.

Method and device for influencing the cut and functional face on fine-blanked finished parts

Rollover for a part generated by virtual fine blanking is predicted and determined prior to producing the part. A digital image, in particular the cutting contour of the part, is generated, provided as an image file and subjected to image analysis in an image processing device. The image analysis provides individual color gradations of the cutting contour. The gradations are associated with a residual thickness in the region of the cutting contour, so as to be indicative of rollover.

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Lyss, Switzerland

Andreas Delis