Iterative, simulation-based shape modification by free-form deformation of the NC programs

Authors:
A. Sacharow;S. Odendahl;A. Peuker;D. Biermann;T. Surmann;A. Zabel
Affiliations:
Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany;Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany;Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany;Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany;Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany;Institute of Machining Technology, TU Dortmund University, Baroper Str. 301, 44227 Dortmund, Germany
Venue:
Advances in Engineering Software
Year:
2013

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Abstract

In production engineering, there are several applications where the geometry of a designed workpiece has to be modified, e.g., optimization of forming tools during springback compensation in sheet metal forming. In general, the modified shape of the workpiece is given as a mesh and has to be converted to a parametric representation by surface reconstruction before manufacturing. In this paper, a new approach for obtaining small shape modifications by direct deformation of the NC programs is presented. In an iterative process, the CAM data is modified by a free-form deformation and is verified by a milling simulation so that the modified workpiece can be manufactured directly on the basis of the original CAD/CAM data without surface reconstruction.