Computer aided sheet metal forming process design
Zbigniew Zimniak
Deep drawing, Press tools design, Automatic diagnosis, Springback, Finite element method.
DOI:
https://doi.org/10.7494/cmms.2006.1.0108
Abstract:
“A system for the computer aided design of sheet metal forming is described. This system was combined with the FEM and theoretical method of determination of a forming limit stress diagram (FLSD). A theoretical method was also developed for determining the FLSD, which is based on the perturbation theory. The perturbation analysis is based on the introduction of a disturbance added to homogeneous solution satisfying the set of governing differential equations of the problem. The finite element technique is used to compute springback compensation in complex parts. This compensation can be computed from the deformed shape of the blank by applying the press and frictional forces to the deformed sheet with equal magnitudes but opposite signs the additional deformation is the amount of springback. This system assures high quality of the products for both simple and complex press forming operations, including deep drawing and stamped part trimming. An original method of controlling and diagnosing press forming processes on the basis of measurements of the magnetic field around the stamped part has been developed. The method is based on the magnetic effect which consists in the generation of a magnetic field by a ferromagnetic body subjected to a mechanical load. Using the system it is possible to design with high precision the sheet metal forming processes without expensive and time consuming trial and error techniques.
Cite as:
Zimniak, Z. (2006). Computer aided sheet metal forming process design. Computer Methods in Materials Science, 6(1), 33 – 41. https://doi.org/10.7494/cmms.2006.1.0108
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