Challenges and Solutions in Distortion Engineering of an Aluminium Die Casting Component

Abstract:

The demand for increased efficiency of resources in industrial manufacturing processes requires continuous developments of materials and production processes. Aluminium components especially used in automotive applications meet the requirements of weight optimised and energy efficient solutions. In this context vacuum die casting enables the production of complex weight optimised components. However, in view of ensuring the needed dimensional accuracy, the productivity potential of the process is still restricted. Hence, the distortion behaviour within the whole process chain of a die casting structural part made of alloy AlSi10Mg was systematically investigated. Starting with the initial state after casting the analysis was focused on the quenching, punching, precipitation hardening and machining of the components. Contour deviations were recorded via a photogrammetry system and a coordinate measuring machine. Especially after die casting and solution annealing significant contour deviations were observed. Residual stress measurements along the process chain pointed out that residual stresses from die casting were released by solution annealing. By the knowledge of distortion sensitive component areas and the understanding of distortion mechanisms compensation strategies were derived based on the investigated processes. Within the paper these deduced strategies and the way to reduce expensive straightening processes and to raise efficiency will be given for industrial applications.

• Periodical: Materials Science Forum (Volume 690)
• Pages: 443-446
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.690.443
• Online since: June 2011
• Authors: Ole Karsten, Kai Schimanski, Axel von Hehl, Hans Werner Zoch
• Keywords: Aluminum (Al), Die Casting, Distortion Engineering, Heat Treatment, Photogrammetry

References

[1] O. Köser, S. Mauer and J. Kaltofen: Gießsimulation als wesentlicher Baustein in der Bauteilentwicklung: Giesserei Vol. 96 (2009) 3, p.22

[2] A. Egner-Walter; S. Olive: Using Stress Simulation to tackle Distortion and Cracking in Castings: Foundry Trade Journal Vol. 181 (2007) 3648, p.294

[3] H.-W. Zoch: From Single Production Step to Entire Process Chain – the Global Approach of Distortion Engineering: Mat.-wiss. u. Werkstofftech. Vol. 37 (2006) 1, p.6

DOI: 10.1002/mawe.200500958

[4] F. Hoffmann, O. Keßler, T. Lübben and P. Mayr: "Distortion Engineering" – Verzugs-beherrschung in der Fertigung: HTM Z. Werkst. Waermebeh. Fertigung Vol. 57 (2002) 3, p.213

DOI: 10.1515/htm-2002-570317

[5] A. Egner-Walter: Berechnung der Entstehung von Spannungen beim Gießen (Gussprodukte, Hoppenstedt, 1999)

[6] A. Gebauer-Teichmann, R. Herzog, A. Egner-Walter, E. Hepp, A. Enselmann, E. Garcia-Sobolevski, J. Gibmeier, B. Scholtes: Fertigungsoptimierung dünnwandiger Gussteile aus Leichtmetall, BMBF research report 02PD2140,-1,-2,-3, Kassel (2003)