Research on a toolpath generation method of NC milling based on space-filling curve

Tool path generated by space-filling curve always turns frequently causing trembling to machine, reducing toollife and affecting workpiece quality. Length and generation time of tool paths are both relatively long. In order to solve these problems, a toolpath generation method of NC milling based on space-filling curve is proposed. First, T-spline surface is regarded as the modeling surface, the grid, which is based on the limited scallop-height, can be got in the parameter space, and the influence value of grid node is determined. Second, a box is defined and planned, and the tool paths are got preliminarily, which is based on minimal spanning tree; Finally, based on an improved chamfering algorithm, the whole tool paths are got. A simulation system is developed for computer simulation, and an experiment is carried out to verify the method. The results of simulation and experiment show that the method is effective and feasible, and length and time of the tool paths are reduced. Copyright © by HIGH TECHNOLOGY LETTERS PRESS.