CNC Rapid Prototyping by Incremental Forming of sheet metal is a new process which can be used to make complex shaped Rapid Prototypes. Tests are being done to determine the forming limits of this process. Five shapes have been used in a recent study of forming limits with results that show deep draws are possible with CNC RPIF and that forming limits are shape dependent. This paper shows the latest results of the tests being conducted with 1.27 mm thick, 3003 aluminum sheet. Forming limits are reported for the following shapes: a hemisphere, a truncated cone, a hyperbola, a pyramid and a five-lobe 'flower' shape. Forming of 1.27 mm thick 3003 Aluminum sheet can attain strains of 400% when the CNC RPIF process is used. The maximum forming angle was found to be 70 degrees and the forming limits were found to be shape dependent. This process is now being used to make Rapid Prototype parts for the automotive industry. Several parts have been made successfully and these will be reported in the near future. These include reflective surfaces for automotive headlights and heat shields for exhaust manifolds. Parts have also been made from stainless steel for helicopter turbine exhaust parts.
Forming limit diagrams for CNC RPIF of sheet metal
Bildung von Blech-Grenzformänderungskurven für die schnelle Prototypentwicklung durch CNC-Intervallumformung
Progress in Virtual Manufacturing Systems, CIRP International Seminar on Manufacturing Systems, 36 ; 551-553
2003
3 Seiten, 7 Bilder, 4 Quellen
Aufsatz (Konferenz)
Englisch
Forming limit at sheet metal forming
Tema Archiv | 1989
|Forming limit diagrams for stamping formability prediction
Tema Archiv | 1998
|A Path Independent Forming Limit Criterion for Sheet Metal Forming Simulations
SAE Technical Papers | 2008
|Predictive evaluation of sheet metal forming limit using 3-D FEM
Kraftfahrwesen | 1993
|Predictive Evaluation of Sheet Metal Forming Limit Using 3-D FEM
SAE Technical Papers | 1993
|