Press Tool Design In CATIA (Assembly & Part Modelling)

A: That's the most common mistake — mixing up tensile coupon thinking with shear mechanics. The chain is simple: shear force ≈ perimeter × thickness × shear strength. 0.6 m × 0.002 m × 300 MPa lands you in the few‑hundred‑kN range, not tens and not thousands, and that's before any press rating margin.

A: That's the trap — attributing every bad outcome to the stripper. The springs control material separation and return force; they do nothing for feed alignment or ram eccentricity. Once they bottom out, you're exposed to pull‑up and ejection issues, but off‑center loading is a different safeguard entirely.

A: That's the usual confusion — thinking manufacturability is the driver. The real reason sits in fatigue and contact stress; sharp corners spike stress and crack early. The standard forces a radius so the punch survives millions of hits without chipping.

A: That's the classic slip — forgetting 'per side' means you double it. Eight percent of 2 mm is 0.16 mm on one flank, and the die opening grows on both sides of the punch, so the model needs 0.32 mm total or the burr prediction is fantasy.