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Numerical Evaluation of Hemming Defects Found on Automotive Door Panels
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  • Journal title : Transactions of Materials Processing
  • Volume 24, Issue 4,  2015, pp.280-286
  • Publisher : The Korean Society for Technology of Plasticity
  • DOI : 10.5228/KSTP.24.4.280
 Title & Authors
Numerical Evaluation of Hemming Defects Found on Automotive Door Panels
Seo, O.S; Jeon, K.Y; Rhie, C.H; Kim, H.Y;
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 Abstract
Hemming is used to connect two sheet metal components by folding the edge of an outer panel around an inner panel to create a smooth edge. The minimization of hemming defects is critical to the final quality of automobile products because hemming is one of the last operations during fabrication. Designing the hemmed part is not easy and is influenced by the geometry of the bent part. Therefore, the main problem for automotive parts is dimensional accuracy since formed products often deviate geometrically due to large springback. Few numerical approaches using 3-dimensional finite element model have been applied to hemming due to the small element size which is needed to properly capture the bending behavior of the sheet around small die corner and the comparatively big size of automotive opening parts, such as doors, hoods and deck lids. The current study concentrates on the 3-dimensional numerical simulation of hemming for an automotive door. The relationship between the design parameters of the hemming operation and the height difference defect is shown. Quality improvement of the automotive door can be increased through the study of model parameters.
 Keywords
Hemming;Pre-hemming;Main-hemming;Height Difference;Springback;Numerical Analysis;
 Language
Korean
 Cited by
 References
1.
P. G. Kim, S. H. Park, 2012, A Study on Improvement of Bending Quality of Hemmed Plates in Sheet Metal Forming, J. Kor. Soc. Precision Eng., Vol. 29, No. 12, pp. 1360~1367. crossref(new window)

2.
H. Y. Kim, H. T. Lim, H. J. Kim, W. H. Lee, C.D. Park, 2004, 3-Dimensional Finite Element Analysis of Hemming for Automotive Outer Panels by Part Model Assembling Method, Trans. Mater. Process., Vol. 13, No. 2, pp. 115~121. crossref(new window)

3.
H. J. Kim, W. M. Choi, J. K. Lim, C. D. Park, W. H. Lee, H. Y. Kim, 2004, Parametric Study of the Hemming Process by Finite Element Analysis, Trans. Kor. Soc. Mech. Eng. A, Vol. 28, No. 2, pp. 149~157. crossref(new window)

4.
S. B. Lee, D. H. Kim, B. M. Kim, 2002, Hemming Process Design of the Permalloy Shielding Can for the Stiffness and Shape Accuracy, J. Kor. Soc. Precision Eng., Vol. 19, No. 5, pp. 29~35.

5.
H. Livatyali, T. Laxhuber, T. Altan, 2004, Experimental Investigation of Forming Defects in Flat Surface-convex Edge Hemming, J. Mater. Process. Technol., Vol. 146, No. 1, pp. 20~27. crossref(new window)

6.
G. Zhang, S. Jack Hu, X. Wu, 2003, Numerical Analysis and Optimization of Hemming Processes, J. Manufac. Processes, Vol. 5, No. 1, pp. 87~96. crossref(new window)

7.
www.esi-group.com, PAM-STAMP2012

8.
P. Jimbert, I. Eguia, I. Perez, M. A. Gutierrez, I. Hurtado, 2011, Analysis and Comparative Study of Factors Affecting Quality in the Hemming of 6016T4AA Performed by Means of Electromagnetic Forming and Process Characterization, J. Mater. Process. Technol., Vol. 211, No. 5, pp. 916~924. crossref(new window)

9.
H. Livatyali, A. Muderrisoglu, M. A. Ahmetoglu, N. Akgerman, G. L. Kinzel, T. Altan, 2000, Improvement of Hem Quality by Optimizing Flanging and Pre-hemming Operations using Computer Aided Die Design, J. Mater. Process. Technol., Vol. 98, No. 1, pp. 41~52. crossref(new window)

10.
S. Li, X. Hu, Y. Zhao, Z. Lin, N. Xu, 2011, Cyclic Hardening Behavior of Roller Hemming in the Case of Aluminum Alloy Sheets, Mater. Des., Vol. 32, No. 4, pp. 2308~2316. crossref(new window)

11.
H. J. Kim, H. C. Jung, J. K. Lim, 2005, Study on the Evaluation and Prediction of Micro-Defects in the Hemming Process, Trans. Mater. Process., Vol. 14, No. 6, pp. 533~540. crossref(new window)

12.
G. H. Kim, S. H. Lee, B. M. Kim, 2008, The Die Design of STS304 Bezel Frame for The Strength Reinforcement in Hemming Process, Trans. Mater. Process., Vol. 17, No. 6, pp. 436~442. crossref(new window)

13.
D. J. Kim, Y. J. Song, H. Chung, Y. H. Han, 2006, Automatic Generation of Timing Chart for Car Panel Hemming Die Design, Trans. Mater. Process., Vol. 15, No. 7, pp. 496~503. crossref(new window)

14.
D. C. Ahn, K. D. Lee, J. J. Yin, K. H. Kim, 2000, A Study on the Design of Hemming Process for Automotive Body Panels, Trans. Mater. Process., Vol. 9, No.67, pp. 624~630.

15.
N. Le Maoût, S. Thuillier, P. Y. Manach, 2010, Drawing, Flanging and Hemming of Metallic Thin Sheets: A Multi-step Process, Mater. Des., Vol. 31, No. 6, pp. 2725~2736. crossref(new window)

16.
N. Le Maoût, S. Thuillier, P. Y. Manach, 2009, Aluminum Alloy Damage Evolution for Different Strain Paths-Application to Hemming Process, Eng. Fracture Mech., Vol. 76, No. 9, pp. 1202~1214. crossref(new window)

17.
Z. Hamedon, K. Mori, Y. Abe, 2014, Hemming for Joining High Strength Steel Sheets, Procedia Eng., Vol. 81, pp. 2074~2079. crossref(new window)

18.
H. Livatyali, S. J. Larris, 2004, Experimental Investigation on Forming Defects in Flat Surface-Convex Edge Hemming: Roll, Recoil and Warp, J. Mater. Process. Technol., Vol. 153-154, pp. 913~919. crossref(new window)