26 February 2004 Total area strain mapping improves total quality of stampings
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Proceedings Volume 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology; (2004) https://doi.org/10.1117/12.519291
Event: Photonics Technologies for Robotics, Automation, and Manufacturing, 2003, Providence, RI, United States
Sheet metal manufacturers are under constant and increasing pressure to improve and document quality, while reducing cost. Furthermore, OEMs are shifting responsibility for quality inspections to suppliers, adding extra burdens. Exciting, shapely product designs are placing greater demands on both quality assurance and development departments. Deep drawing and other new advanced forming methods push materials to their limits. There is a new stamping quality control tool available for easy, effective and reliable determination of shape, strains and thinning. Full-field optical vision systems, based on the well-known principles of circle grid analysis and photogrammetry, provide automated analysis and quantitative color maps for every square inch of complex parts. Quality results are displayed on a 3D computer model, using the actual measured dimensions of the real part, allowing it to be viewed from any angle. One of the key features of this system is a dynamic link between the forming limit diagram and the strain/thinning color map. When a point is clicked on either display, a second crosshair automatically highlights that same point on the other display, and a detail box presents all measured and calculated quantities. Critical points can be identified at a glance so that corrective action can be taken. Examples shown include before and after die optimization, and analysis of a 1.2 meter long B-pillar stamping.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Timothy Schmidt, Timothy Schmidt, John Tyson, John Tyson, Konstantin Galanulis, Konstantin Galanulis, "Total area strain mapping improves total quality of stampings", Proc. SPIE 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology, (26 February 2004); doi: 10.1117/12.519291; https://doi.org/10.1117/12.519291

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