Virtual Grinding Of Formed Bits Of Rollers

Many kinds of rollers are used in rolling mills. Recently, these formed bits are ground manually and tested by some simple templets. In the information age, it is necessary and possible to realize the integration of CAD/CAM for machining them. After reformed, factories can improve working accuracy and efficiency, decrease the intensity of labor, and boost their competitiveness eventually.In order to conform to the processing requirements and diminish the cost of production, it is good enough to use 2.5D CNC grinding system. In the thesis, the virtual grinding of this system is mainly discussed.OpenGL can be applied in many hardware platforms and operating systems. It allows one to create interactive programs that produce color images of moving 3D objects. Further more, it is closely related to Visual C++ 6.0 with which OpenGL models can be controlled. In this way, virtual CNC grinding simulation can be displayed.A new method is found which is different from usual one that inputs *.3ds models into OpenGL at present. This thesis uses a 3D graph conversion tool to convert model information to *.c files in OpenGL after solid models are built with Pro/Engineer. Then the virtual grinding geometric simulation is developed in Visual C++ 6.0.Linear interpolation is used in CNC machining. NC codes are the basis to drive the whole virtual grinding environment, but the program is impossible to directly carry out NC codes. So the code translation module is needed which is according to G and M codes.This simulation program has friendly interface and simple manipulation. It offers users an inteactive environment to see the grinding process of formed bits. It can be used not only in working, but also in training.