Optical inspection of formed sheet metal parts applying fringe projection systems and virtual fixation

• Autorzy: Weckenmann A. , Weickmann J.
• Języki publikacji: EN

Abstrakty

EN

Modern forming technology allows the production of highly sophisticated free form sheet metal components, which are subject to a reversible geometrical deformation caused by residual stress, gravity or variations of the material. This distortion is usually removed during assembly and therefore the part's tolerated parameters have to be inspected in fixed state, which simulates assembly conditions. Today this time-consuming work is done on CMMs (Coordinate measuring machines). Using fast optical measuring systems and virtual fixation, this process chain can be dramatically shortened and in-line measurement seems to be possible in future. Virtual fixation means that at first a workpiece is measured in distorted state without fixation and afterwards the shape in assembled state is simulated by FEM analysis. Thus, workpieces can be inspected with significantly reduced effort.

Słowa kluczowe

EN

virtual distortion compensation; fringe projection; finite elements method (FEM); optical metrology; inspection process

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2006
• Tom: Vol. 13, nr 4
• Strony: 321--334
• Opis fizyczny: Bibliogr. 10 poz., rys. kol., wykr.

Twórcy

autor

Weckenmann A.

autor

Weickmann J.

• University Erlangen-Nuremberg, Chair Quality Management and Manufacturing Metrology, Naegelsbachstr. 25, 91052 Erlangen, Germany,

Bibliografia

• 1. Weckenmann A., Gall P., Ernst R.: Virtuell einspannen, Prüfprozess flächiger Leichtbauteile verkürzen. Qualität und Zuverlässigkeit, no. 49, 2004, pp. 49-51.
• 2. Weckenmann A., Gall P., Gabbia A.: 3D surface coordinate inspection of formed sheet material parts using optical measurement systems and virtual distortion compensation. Proc. of the 8th International Symposium on Laser Metrology, 2005. Merida, Mexico, 12th-18th February 2005, vol. 5776, pp. 640-647.
• 3. Weckenmann A., Gabbia A.: Testing formed sheet metal part using fringe projection and evaluation by virtual distortion compensation. Fringe 2005, Proc. of 5th International Workshop on Automatic Processing of Fringe Patterns, Stuttgart, Germany, 12th-14th September 2005, pp. 539-546.
• 4. Weckenmann A., Gall P., Hoffmann J.: Inspection of holes in sheet metal using optical measuring systems. Proc. of VIth International Science Conference Coordinate Measuring Technique, Bielsko-Biala, Poland, 21st-24th April 2004, pp. 339-346.
• 5. Stockinger F.: Kalibrierung von optischen 3D-Sensoren. Erlangen, Germany, Dissertation 1997.
• 6. Frankowski G., Chen M., Huth T.: Real-time 3D Shape Measurement with Digital Stripe Projection by Texas Instruments Micromirror Devices DMD. Proc. of SPIE, vol. 3958, San Jose, USA, 22nd-28th January 2000, pp. 90-106.
• 7. Weckenmann A., Knauer M., Killmaier T.: Uncertainty of Coordinate Measurements on Sheet Metal Parts in Automotive Industry. Sheet Metal 1999, Proc. of the 7th International SheMet, Erlangen, Germany, 27th-28th September 1999, pp. 109-116.
• 8. Karbacher S., Häusler G.: A new approach for modelling and smoothing of scattered 3D data. Ellson R.N., Proc. of SPIE, vol. 3313, San Jose, USA, 24th-30th January 1998, pp. 168-177.
• 9. Steinke P.: Finite-Elemente-Methode. Berlin, Heidelberg, New York, Springer 2004.
• 10. Sun Y., Page D., Paik J. K., Koschan A., Abidi M. A.: Triangle Mesh-Based Edge Detection and its Application to Surface Segmentation and Adaptive Surface Smoothing. Proc. of IEEE 2002, International Conference on Image Processing (ICIP 2002), Rochester, New York, USA, 22nd-25th September 2002, pp. 825-828.