Optimization of relative tool position in accumulative double sided incremental forming using finite element analysis and model bias correction
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Double-Sided Incremental Forming (DSIF) uses two small, independently moving, hemispherical tools on either side of the sheet to form a desired shape by following a predefined tool path. This study was motivated by the observation that the relative tool position of the tools, specified in the tool path generation algorithm, affects the formed geometric accuracy. A methodology for defining the relative tool positioning in the tool path generation algorithm based on local part geometry is proposed using simplified Finite Element Analysis (FEA) and sample physical experiments combined with Gaussian Process modeling techniques. This approach can take into account the mechanics of deformation in DSIF explicitly and physical compliance of the DSIF machine implicitly. Physical experiments were performed to demonstrate the effectiveness of the proposed framework.
KeywordsIncremental forming Process design Design methodology
the in-plane distance between the two tool axes
distance from top of bottom to bottom of the sheet
desired wall angle
formed wall angle
radius of top tool
radius of bottom tool
initial sheet thickness
The authors would like to acknowledge the National Science Foundation and Department of Energy, USA DE-EE0005764 for their support.
This work was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any findings, opinions, and conclusions or recommendations expressed in this report are those of the authors and do not necessarily reflect those of the United States Government or any agency thereof.
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