Machine for forming metal stampings having an edge portion folded over on itself

A machine for forming (1) metal stampings comprising an upper die holder (2) on which an upper die half (3) and an upper clamping yoke (7) are mounted;

• a lower die holder (4) on which a lower die half (5) and a lower clamping yoke (8) are mounted;
• handling means (6) suitable to achieve the bringing together and moving apart of the upper die holder (2) and the lower die holder (4);
• and an edge cutting/bending unit (9) suitable to carry out both the cutting and bending of the edge and arranged between the two die halves (3, 5) and the two clamping yokes (7, 8);
• said edge cutting/bending unit (9) comprising a cutting blade (10) suitable to cut the edge of a sheet to be formed;
• said forming machine (1) being characterised in that said edge cutting/bending unit (9) comprises:
• an outer bending blade (13) arranged below said cutting blade (10) and which forms a pushing step (G) with it, facing in use towards said upper die half (3), and
• an inner bending blade (16) arranged to slide along said outer bending blade (13);
• said outer bending blade (13) and said inner bending blade (16) having two respective toothed surfaces (13a) and (16a) interlocked together and arranged to slide against each other;
• said cutting blade (10), said outer bending blade (13) and said inner bending blade (16) being movable vertically in a mutually independent manner.