The Research And Implement Of Trajectory Optimization And Machining Simulation Of Water-jet Machine Based On DXF File

The development of manufacturing requires the higher flexibility and generality of NC (Numerical Control) machine. The NC equipments based on motion control board increase gradually. However, the application of auto-generating NC code on these devices is not enough. At present, manual programming is the main method, which limits the spread and use in wilder field because of its heavy workload. As an important method of special processing in modern manufacturing, the water jet cutting process is employed increasingly. It is an important issue to be addressed that how to get the CNC program of the water jet cutting process quickly and accurately. With the developing tool of Visual C++, combined with a certain type of a motion control card for water-cutting machine, a control system software for the water cutting machine is developed based on DXF files.Firstly, the DXF file structure is analyzed in detail in the thesis. On the base of the analysis, a novel method is proposed that can automatically extract the data information of the part drawing. Then the data information of the graphic elements extracted from the DXF files is processed in a further step. The process paths are formed according to the process requirement of the water cutting machine. Regarding to the issues of processing randomness and idle stroke, an optimization algorithm is proposed to change the order of the processing paths to decrease the idle stroke. The algorithm improves processing efficiency. It automatically generates CNC program based on NC code format which needed by water cutting process. The NC code compiler is programmed in the thesis. The water jet radius compensation is considered in the algorithms. A simulation example is demonstrated that the algorithm is valuable.