Prufi
PRU-128Declared input

Single draw exceeds qualified draw ratio

Sheet metal

Scope and limits

Round analytic cup blank/punch ratio compared only with explicitly qualified process limit.

Standards and references

BECKWOOD-DRAW-RATIO-2026

Beckwood — Deep Draw Sheet Metal Forming

Source scope
Declared single-operation deep drawing with material/process-qualified draw ratio.
Implementation in Prufi
FAQ How do I know if my part will require multiple forming steps?: draw ratio means blank diameter/punch diameter; limit varies with material and process. Compare with user-qualified maximum only, requiring operation_ref. Exact sharp-bottom cylindrical cup and matching punch diameter; tubes, holes, fillets, redraws, blank sufficiency, springback and ironing excluded.

STEP examples for this check

No public STEP example is currently assigned to this check.

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