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Fundamental Research and Draw Die Concepts for Deep Drawing of Tailored Blanks
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English
Abstract
According to the present state of knowledge, the use of “Tailored Blanks” with different sheet thicknesses and/or grades represents an interesting manufacturing alternative in the design and development of sheet metal parts in the automotive industry. In order to assess the forming behavior, fundamental research was conducted on laser and mash seam welded blanks. Based on this experimental findings, a segmented draw die was designed and built to determine the limits of the metal forming process by deep drawing of car body parts. The results with this draw die showed that a uniform blankholder pressure must be guaranteed during the forming process in the flange region of the part. This necessitated definite slots in the region of the weld line for the mash seam welded blanks. Furthermore, a die concept was presented to enable an equalization of both sheet thickness steps and sheet thickness fluctuations, without requiring replacement of the respective draw die components.
Citation
Siegert, K. and Knabe, E., "Fundamental Research and Draw Die Concepts for Deep Drawing of Tailored Blanks," SAE Technical Paper 950921, 1995, https://doi.org/10.4271/950921.Also In
References
- Weißner, R.
- Schneider, C. Prange, W.
- Knabe, E. 1994
- Radlmayr, K.M. Szinyur, J. “Laser welded sheet panels for the body-in-white” IDDRG working groups meeting Pisa (Italy) May 1991
- Pickett, M.F. Bhatt, K.M. “Formability issues in the application of tailored welded blank sheets” SAE-Papers 930278 1993 1 9