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5. Product/quality tracking
The quality of stamped parts is ensured by various controls:
firstly, a visual check by the operator in charge of palletizing the parts at the end of the line, whose eye assesses the absence of defects in critical areas of the part;
secondly, a statistical inspection carried out by periodically sampling parts whose geometry is checked on test dummies and characterized by a geometric quality index (GQI).
For external parts, inspection is enhanced by high-frequency probing.
An emerging practice in this field is to instrument presses and compare the effort/stroke signals measured with a pre-recorded curve (known as the tool signature) corresponding to the stamping cycle of a good part. Any deviation of the measured signal outside the acceptable range...
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References
Theses
- - http://www.sudoc.abes.fr
- ABICHOU (H.) - Simulation de l'emboutissage à froid par une méthode asymptotique numérique. - Thèse de doctorat Sciences et Techniques, Metz (2001).
- ...
Organizations
Syndicat National du Découpage et de l'Emboutissage SNDE.
Center Technique des Industries Mécaniques CETIM http://www.cetim.fr .
Software and distributors
(non-exhaustive list)
ABAQUS - Abaqus Inc. http://www.abaqus.com
AUTOFORM - AutoForm Engineering http://www.autoform.com
FORGE2 - Transvalor http://www.transvalor.com
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