Stamping slug retention recess and method

A stamping press for a stamping operation, the stamping press including a trim punch and die trim section assembly wherein the trim punch and die trim section assembly retains a stamping slug generated by a stamping operation on a metal sheet, the stamping press comprising:

• a trim punch and a die trim section;
• the die trim section comprising a body with a top surface for supporting the sheet and a die trim profile opening extending into the body from the top surface, the die trim profile opening comprising interior trim profile walls and extending along a longitudinal central axis;
• the trim punch being movable along a punch stroke having a predetermined length and receivable into the die trim profile to contact and drive the stamping slug stamped from the sheet a maximum depth along the longitudinal axis into the trim profile opening;
• at least one recess along an edge of said die trim profile opening, each at least one recess extending parallel with the longitudinal axis from the top surface of the body along the die trim interior walls and having a height along said interior trim profile walls from a top end of the recess at the top surface of the body to a bottom end of the recess;
• the height of each at least one recess being at least equal to the maximum depth that the stamping slug is driven into the die trim profile opening by the trim punch during the stamping operation whereby a respective tab attached to the stamping slug created by the stamping operation remains in the at least one recess when the stamping slug has reached the maximum depth into the die rim profile opening;
• and each at least one recess has a respective cross-sectional area in a plane perpendicular to the longitudinal axis along the height of the recess, the cross-sectional area continuously decreasing along the height of the recess from the top of the recess to the maximum depth the stamping slug is driven into the recess.