Research Of CAD/CAM Interfacing Technology On ANCA Machine Tool

With the rapid development of NC machining technology, various products with complicated structures and forms and diversified functions have been manufactured by modern manufacturing system. And the design and manufacture of the tools is one of the very important guarantees for realizing machining of mechanical manufacturing systems. In order to be adapted to the fast developing demand of NC machining, the design and manufacture of the tools will be inevitably towards the integration of mathematical theories, computer application technologies and modern design methods. Moreover, the design and manufacture utilizing3D CAD/CAM software has become a major development pattern. The key factor that restricts the development of tool industry is the machine tool, and whether NC grinding machine of high precision and intelligence can be designed and manufactured has become an important symbol to evaluate the development in this industry. The fact that domestic tool enterprises largely adopt imported processing machine tools whose functional modules are ciphered makes the design and processing to the tools depend heavily on machine tools; therefore, reaching a deadlock of "processing determines design" and limiting the innovation and the new product development in the tool industry.In consideration of a largely used NC tool grinding machine (ANCA TX7+grinding machine) of high precision in a domestic tool enterprise, it is researched in this thesis the interfacing between the machine and the3D CAD/CAM software-UG. This research is mainly focused on the design and development of ANCA machine tool dedicated post processor based on UG software. On account of the structure and the kinematic chain transfer mode of the machine tool, a kinematic transformation model based on the homogeneous coordinate transformation method and the Denavit-Hartenberg method is established in this thesis, and the component motion of the machine tool axles is solved, which lays a solid foundation for the realizing of the post processor. A nonlinear error model of the machine tool is established through analyzing the generation mechanism of nonlinear error unique to five-axis CNC machine tool. And the transnormal errors are reduced to a large extent by adopting interpolation technology to tools, which makes an effective control to errors and an optimized tool path. Moreover, through the analysis to CLSF and NC code, their mutual correspondence has been worked out in this thesis and a code transformation has been completed through combining the two methods of command word translation and coordinate value assignment, according to the structural features of NC program segment.This research, with some practical value in expanding the technological scope of machine tools, provides a solid basis for the final development of the dedicated post processor and breaks the deadlock of "machine tools determine design" as well.