Prufi
PRU-131Declared input

Extrusion pre-pierce is too small

Sheet metal

Scope and limits

Declared pre-pierce >=1 local sheet thickness; final bore is not substituted for pre-pierce.

Standards and references

MATE-EXTRUSION-2021

Mate Technical Solutions Guide LIT00682 Rev E 2021 and Success Tips

Source scope
Guide printed pp45,47: single-hit pierce/extrude <=1.90 mm mild steel; tapping extrusion bottom-to-top height <=2.5T. Success Tips extrusion-height section requires pre-pierce >=1T.
Implementation in Prufi
Explicit tapping_extrusion or pierce_extrude operation; exact existing full cylindrical collar recognizer on a single solid. Local gauge measured from host planes. Pre-pierce is declared and applies to all matching collars. Guidance screens only; no thread strength, thinning, cracking or actual manufacturing-route proof.

STEP examples for this check

No public STEP example is currently assigned to this check.

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