Parallel Numerical Control Simulation Method Based On Three-way Dexel

Numerical control simulation system is of great significance in improving the efficiency of numerical control machining,and the real-time performance and authenticity are important qualities of a numerical control simulation system.At present,most numerical control simulation systems use space division method to represent model entities,thus speed or quality often come at the expense of the other.The numerical control simulation method proposed in this paper improve the simulation accuracy by using the Tridexel modeling,and real-time performance of simulation is boosted through application of parallelization technique,so that authenticity of simulation can be enhanced under the premise of acceptable real-time performance.This paper presents a parallel numerical simulation method based on Tridexel.To start with,volumetric models of the workpiece is constructed,then sweep volume of the machining tool is generated based on the trajectory of machining tool through discretization method,and parallel method is used to accelerate boolean subtraction between the sweep volume and the workpiece entities.After that,surface of the obtained volumetric model are reconstructed and rendered.In terms of surface reconstruction,two different surface reconstruction algorithms are proposed to meet different requirements of accuracy and speed in fast simulation and meticulous observation.The tri-quad pilliar algorithm directly uses the Tridexel model to generate the reconstructed surface,which has a high parallelism and does not need to convert Tridexel structure to voxel structure,which further improving the speed of surface reconstruction to supply the demand of fast simulations.In parallel dual contouring algorithm,Hermitian data is extracted from Triexel model to reconstructed the surface with better details.Through this algorithm,sharp surface features such as corners and edges that were lost due to insufficient sampling can be repaired.Parallelization increases the speed of triquad pilliar algorithm and dual contouring algorithm by 1.9 ～ 2.1 times and 6 ～ 16 times respectively,which can meet the real-time requirements of NC simulation.