A Predictive Model for Tolerance Verification of Bent Sheet Metal Parts

2011 ◽  
Vol 473 ◽  
pp. 516-523
Author(s):  
Thi Hong Minh Nguyen ◽  
Joost R. Duflou ◽  
Jean Pierre Kruth
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Predictive Model ◽  
Sheet Metal ◽  
Dimensional Accuracy ◽  
Complete Model ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Tolerance Verification ◽  
Specific Part

This paper presents a complete model including method and result for tolerance verification of bent sheet metal parts. The method uses a mathematical model to take into account aspects influencing the dimensional accuracy of linear and angular dimensions of bent parts. The model was implemented using a set of experimental data to estimate the dimensional accuracy for dimensions of interest of a specific part. Comparing the prediction data with the measured results allowed validation of the model.

scholarly journals Calculating the gravity-free shape of sheet metal parts

2021 ◽  
Author(s):  
Felix Claus ◽  
Hans Hagen ◽  
Bernd Hamann
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Sheet Metal ◽  
Optical Measurement ◽  
Aerospace Industry ◽  
Normal Direction ◽  
Cad Model ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Stress Free State

AbstractThis paper presents an iterative finite element (FE)–based method to calculate the gravity-free shape of nonrigid parts from an optical measurement performed on a non-over-constrained fixture. Measuring these kinds of parts in a stress-free state is almost impossible because deflections caused by their weight occur. To solve this problem, a simulation model of the measurement is created using available methods of reverse engineering. Then, an iterative algorithm calculates the gravity-free shape. The approach does not require a CAD model of the measured part, implying the whole part can be fully scanned. The application of this method mainly addresses thin, unstable sheet metal parts, like those commonly used in the automotive or aerospace industry. To show the performance of the proposed method, validations with simulation and experimental data are presented. The shown results meet the predefined quality goal to predict shapes within a tolerance of ± 0.05 mm measured in surface normal direction.

Experimental and Numerical Analysis of Blanking for Thin Sheet Metal Parts

2001 ◽  
Vol 4 (3-4) ◽  
pp. 319-333
Author(s):  
Vincent Lemiale ◽  
Philippe Picart ◽  
Sébastien Meunier
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal
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