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

作者：Sacharow A; Odendahl S^*; Peuker A; Biermann D; Surmann T; Zabel A

来源：Advances in Engineering Software, 2013, 56: 63-71.

DOI：10.1016/j.advengsoft.2012.11.007

• CAD/CAM
• Shape modification
• Free-form deformation
• Milling
• Simulation
• Springback

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.