The Research And Development Of NC Machining Simulation System For Seven-Five Axis Machine

As an advanced NC machining technology, five-axis machining for propeller is widely used abroad but limited in domestic. The goal of Hi-Tech Technology and Development Program "The seven-five axis machine tool used in ship propeller machining"is to improve the application of five-axis NC machining technology. As part of five-axis NC machining technology, NC machining graphical simulation is important, it can verifying the accuracy of NC machining programs, and providing a way to monitor the real time machining process. So it's significantly to do some research on NC machining graphical simulation based on five axis machining for propeller. On the basis of study, both structure of the seven-five machine tool and the CNC system, the specific idea and implementary strategy for NC machining simulation system, include verification of NC programs and real time tool path monitor, are discussed theoretically and practically in this thesis. The mechanism model of seven-five axis lathe-mill machine is proposed according to the mechanism theory. The movement model is established using coordinate transformation and the solving of this model is used to seek the key point of tool-path. NC programs are the basis to drive the NC machining, but the program is impossible to directly carry out NC programs. So a NC programs translation module is established to translate it to acceptable data for NC programs verification program. A prototype of NC machining graphical simulation system is developed using Visual C++6.0 based on OpenGL. This simulation system is based on wireframe module, simulating result is limited for the assessment of NC machining. A 3D simulation system based on solid module is expected on further research.