Papers by Keyword: Scanning Path Planning

Abstract: The scanning process of fused deposition modeling is realizing the fill of certain region, Therefore, reasonable scanning path planning directly affects the forming efficiency and the precision of the work piece. The method of Hilbert curve fractal scanning path which basing on the characteristics of both partition and parallel scanning is put forward basing on the analysis of the existing scanning mode. Application of improved curve filling method for complex curved surface forming planning, according to the characteristics of the Hilbert curve and Hamilton circuit, combined with the characteristics of the scanned level scan path trajectory planning, generate a continuous and comprehensive function value which the weight minimum scanning track under the premise of ensuring the quality of scanning. In order to avoid the generation of island type trajectory, setting a decimal for each loop can easily distinguish between each circuit, finally obtains the scan trajectory. The method can be used to generate scanning track continuous greatly reducing the spray head start and stop times and improves the processing efficiency of the whole, not only to meet the accuracy requirements and can generate non scanning path interference but also high forming efficiency.

Abstract: A method is presented based on geometric-curvature characteristics in which a scanning path planning for laser bending of a straight tube into a curve tube in a two- and three-dimensional space. In a two-dimensional (plane) bending, the steel tube is divided into several segments according to the extreme point and inflection point of the desired shape of the tube, taking the extreme point as the initial place of the path planning, using different scanning space for every segment in order to identify the scanning paths. For a tube bending in a three-dimensional space, a projection decomposition method is used, where the three-dimensional is decomposed into two two-dimensions, and respective scanning path planning and process parameters are thus acquired. By combining the data in the two-dimensional planes, the three-dimensional scanning path plan was obtained. Finally, an experimental verification is carried out to bend straight tubes into a two-dimensional sinusoidal and a three-dimensional helical coil-shaped tube. The results show that the proposed method of scanning path planning is effective and feasible.