Patent ID: 9707613
Date: 2017-07-18
CPC Classifications: B21D

Claim:
1. Apparatus for shaping sheared edges on stamped or fine-blanked work pieces having at least one burr, comprising an upper part and a lower part, which form at least one cutting stage comprising a stamping or fine-blanking stage for cutting at least one of outer or inner contours of the workpiece, and at least one forming stage for mashing the at least one burr created during cutting, the forming stage comprising a fixed upper die part having an embossing bell and a lower die part movable in a stroke direction and having an embossing anvil, wherein the forming stage comprises a shaping punch, which has a shaping region for smoothing sheared edges of the inner contour to a final shape and an embossing shoulder for mashing the burr of the inner contour, the shaping punch being configured so that the shaping region initially bends the at least one burr on the inner contour away from the respective sheared edge, then engages the sheared edges and, by material displacement, widens the inner contour along the circumference thereof, and so that the embossing shoulder of the shaping punch mashes the respective burr on the inner contour when the widening on the workpiece has ended and, during separating of the shaping punch from the workpiece, flattens an embossing bead created during the mashing.