Research On3D Radius Compensation Algorithm For Five-Axis CNC Machine Tool With Dual Rotary Table

Five-Axis Linkage CNC System with high speed and high precision is classified as national important strategic equipment. And it is also considered as an important role, even one way, to deal with the processing of impeller, blade, marine propeller, heavy generator rotor, turbine rotor, a large diesel engine crankshaft and other complex surfaces.However, in the practical application, Five-Axis Linkage CNC System has to face two problems:the first one is difficulty for programming; the second one is difficulty for the rapid changing NC codes. All these will conclude to the lack of3D Radius Compensation in Five-Axis CNC Linkage system, which stands up as a major bottleneck in the development of CNC system for a long time. There are some primary reasons of difficulties. Due to the two added axis of rotation, the space motion and the pose have become very complex. And the cutter radius compensation’s implementation has been extremely difficult. The traditional Radius Compensation of two or three axis CNC system is not suitable for the Five-Axis CNC system.To solve this problem, This paper puts forward the algorithm of3D Radius Compensation, applies the algorithm by using Visual C++6.0software to program and finally a validated simulation is put up in the Vericut software.The main study work and achievement are introduce in this passage as bellow based on some intensive analysis, research and summary in this field.1. The mathematical model of3D Radius Compensation in Five-Axis CNC machining is established, by which this model can be achieved.2. The mathematical model of Dual Rotary Table Five-Axis CNC machine is established, by which Post processing algorithm can be achieved and the movement of the Five-axis CNC machine can be solve.3. With the help of UG software on the blade case processing, the cutter trace planning has been finished, CLS file is output to provide the processing information to derive the algorithm of3D Radius Compensation. 4. A post processing simulation system for3D Radius Compensation is developed in the Visual C++6.0platform. It has to read in CLS file, the only need is to modify the corresponding tool parameters, this system will output a new CLS file or NC codes with compensation.5. The NC codes with compensation are simulated to process in Vericut. By comparing the experimental results of the implementation of3D Radius Compensation with different radius in the NC code processing, we can see that the design is feasible.The algorithm derived in this paper has good universality and small amount of calculation. But it needs a lot of storage space in the information collection of cutter location file if this file is too big. However, because of the modern NC system storage capacity has been greatly improved, the algorithm can meet the processing requirements.