The dimensional accuracy of bent sheet metal parts is influenced by many factors and possible sources of inaccuracy such as the sheet material, machine, and material handling. This paper addresses the issue of tolerance verification for sheet metal bending by analytically and experimentally exploring the associations between each of these factors and the achievable dimensional accuracy of bending operations. Making use of the GUM method for quality assessment, in a first step, the influencing factors on the angular and linear dimensions of the parts are listed. The influences of these factors on each type of dimension are subsequently determined by geometry analysis. Secondly, special experimental setups were designed and experiments were conducted with industrial machines to establish the statistical characteristics of these factors. Therefore, the dominant factors determining the dimensional variations of the bending operations were fully identified and quantified. The result of this study can be used to predict the error range and thus the scrap ratio for the process. The developed methodology allows to point out possible improvements in the process plan, and most importantly, to predict the achievable dimensional accuracy of complex bent parts
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
[De Vin, 1996] de Vin, L.J., Streppel, A.H. and Kals, H.J.J., The accuracy aspect in setup determination for sheet bending, Int. J. Advanced Manuf., Vol. 11, 1996, pp 179-185.
[Inuiet al., 1998] Inui, M. and Terakado, H., “Fast Evaluation of Geometric Constraints for Bending Sequence Planning”, Proc. of IEEE Int. Conference on Robotics and Automation, Vol. 3, 1998, Leuven, pp 2446-2451, ISBN0-7803-4300-X.
[Shpitalniet al., 1999] Shpitalni, M. and Radin, B., “Critical Tolerance Oriented Process Planning in Sheet Metal Bending”, Trans. of ASME J. of Mech.Design, Vol. 121, 1999, pp. 136-144.
[Hagenah, 2003] Hagenah, H., “Simulation based Evaluation of the Accuracy for Sheet Metal Bending caused by the Bending Stage Plan”, Proc. 36th CIRP Int. Seminar on Manufacturing Systems, 2003, Saarbrücken, Germany.
[Streppelet al., 1993] Streppel, A.H., Vin, L.J. de, Brinkman, J., Kals, H.J.J., “Suitability of Sheet Bending Modelling Techniques in CAPP Applications”, J. Materials Processing Technology, Vol 36, 1993, pp. 139-156.
[Singhet al., 2004] Singh, U. P., Maiti, S. K., Date, P. P. and Narasimhan, K., “Numerical simulation of the influence of air bending tool geometry on product quality”, J. Materials Processing Technology, Vol 145, 2004, pp. 269-275.
[GUM, 1992] ISO standard, “Guide to the expression of uncertainty in measurement”, ISO/IEC/OIML/BIPM, First edition, 1992
[Kroezeet al., 1994] Kroeze, B., Streppel, A.H. and Lutters, D., “Tools and Accessories for Press Brakes”, Proc. of the 2nd Int. Conf. on Sheet Metal, Belfast, April 1994, ISBN: 1 85923 025 3, pp 251-260.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer
About this paper
Cite this paper
Nguyen, T.H.M., Duflou, J.R., Kruth, JP., Stouten, I., Van Hecke, J., Van Bael, A. (2007). Tolerance Verification for Sheet Metal Bending Factors Influencing Dimensional Accuracy of Bent Parts. In: Davidson, J.K. (eds) Models for Computer Aided Tolerancing in Design and Manufacturing. Springer, Dordrecht. https://doi.org/10.1007/1-4020-5438-6_34
Download citation
DOI: https://doi.org/10.1007/1-4020-5438-6_34
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-5437-2
Online ISBN: 978-1-4020-5438-9
eBook Packages: EngineeringEngineering (R0)