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Published in:
2021 | OriginalPaper | Chapter
Extension of Process Limits with Bidirectional Deep Drawing
Authors : S. Kriechenbauer, P. Müller, R. Mauermann, W.-G. Drossel
Published in: Production at the leading edge of technology
Publisher: Springer Berlin Heidelberg
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Abstract
Bidirectional deep drawing is a process for sheet metal forming on servo screw presses in order to influence part properties in a targeted manner and to extend process limits. With servo drives, it is possible to freely change the motion and force during the forming process. Experimental and numerical investigations show the extension of the process limits. In deep drawing, the process forces are indirectly transmitted from the flange via the part frame to the bottom area. In this process, a crack may occur near to the bottom of the part due to excessive thinning. In bidirectional deep drawing, the weak point can be strengthened with a suitable motion profile. Thus, the drawing depth can be deeper, because higher process forces can be applied. The design of the motion profile in bidirectional deep drawing is supported by a variance-based sensitivity analysis. This allows the potential of servo screw presses for sheet metal forming to be better exploited.