| The reverse engineering and rapid prototyping manufacturing by the modern manufacture technology in the integrated development tendency to embark, in view of the RE/RPM data stream in the adaptive slicing processing document production, conducts the topic research and the organization paper work take the adaptive slicing algorithm of point cloud data from free-form surface as the paper center, this article does the main work as follows:Gain the cloud data first, the viewpoint matches among them and specifically for the cloud collecting studies data pretreatment method, including the cloud data multi-viewpoints matching, by the K neighbouring near-point establishment data space relations, data smoothing and filtering method, by partial method carries on the data part retrench to the change limitation value to simplify.Next research free tune flour dim sum cloud data auto-adapted lamination algorithm, is during each has the region certain surface error by the grid and the superficial error definition, piles the level altitude according to this determination; Piles the level outline to withdraw divides into two kinds: Regarding many by tangential path and circular arc composition machine parts outline, determines the characteristic grid grid point by the curvature law if linear, and by tangential path or circular arc connection; Regarding the general physique, by the correlation is the data calculated the judgement linearity relations, and take the tangential path connection as the closed outline, uses three times B transect curve to carry on the curve to the original outline data point to approach the fitting.Adopts the CLI form output outline data through the analysis and finally forms the RPM processing document. Carries on the programming by Visual C++ and OpenGL, data processing prototype system PAS was developed, and it has confirmed this article algorithm validity. |
