Single Point Incremental Forming (SPIF) is a recently developed dieless sheet metal part production technique that is gradually evolving towards industrial applicability. In this process a sheet metal part is formed in a stepwise fashion by a CNC controlled rotating spherical tool without the need for a supporting (partial) die. This technique allows a relatively fast and cheap production of small series of sheet metal parts.
In the SPIF process generic, freeform shapes can be produced using a standard, spherical, CNC controlled tool. The process starts from a flat sheet metal blank, clamped on a sufficiently stiff rig and mounted on the table of a CNC machine. To form a part, the machine tool follows a pre-programmed contour, similar to a conventional milling operation. The main advantage of this method is that no die is required, making this an ideal process for rapid prototyping or small batch production.
Our research aims at a more fundamental study of the SPIF process including:
A CAD model with a toolpath generated for the SPIF process
Different case studies have been performed by our research group. A short summary of the results regarding accuracy, wallthickness and required forces can be found below:
We have two dedicated incremental forming setups at our disposal :
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