B-Spline Surface Approximation for CAD Model Reconstruction

In this study, a proposed method of B-spline surface approximation has been developed to reconstruct free-form surfaces from measured points that were obtained from physical objects. An automatic reverse process from data points to manufacture was applied for CAD/CAM/CNC to obtain accurate and smooth surfaces. These criteria were solved by minimizing sum of squared distance errors and generating knot vectors. Finally, the smooth model could be achieved a mean of distance error of 0.0291 mm with a standard deviation of 0.0661 mm from the given data. The finding results indicate that the developed method can overcome the surface quality problem for manufacturing mould on CNC machining center from measured point data.