The Overhauling System Of Diesel Engine Based On Virtual Prototyping Technology

With the development of information technology, computers are used in different field of civil production. In mechanical field, the broad using of CAD and virtual prototyping technology based on CAD make the efficiencies of production higher, the costs of production lower, and the qualities of product better. Currently virtual prototyping technology is used in many aspects of production, such as design and manufacture, but it is seldom used in overhauling of product. The overhauling system of diesel engine based on virtual prototyping technology was developed in this thesis experimentally, and the main work is to study how to construct this system. The geometrical characteristics and the assembly structures of the parts can be observed in the virtual environment, the 3D models can be controlled, the process of assembly can be controlled and the overhauling documents can be browsed at the same time in the system. So the malfunction of diesel engine can be found approximately without disassembling the diesel engine practically.The system was compiled by VC++6.0 on Windows 2000 professional. The 3D models of diesel engine were constructed in Pro/ENGINEER 2001, and these models were exported into the OBJ files that are one kind of standard graphics file. The graphics interface to OBJ files was developed in VC++6.0, through which the model data in OBJ files is import to the system. The geometrical reconstruction functions were realized with the standard functions of the OpenGL that is one kind of graphics standard and was included in this system, the accessorial control functions were also realized at the same time. All data including the assembly data and the overhauling document was organized and stored in the database. The data in database was accessed through with the interface technology of database, and used to realize the simulation of assembly and disassembly and the simultaneousshow of the overhauling documents in VC++6.0. In fact, the context included in the overhauling system of diesel engine is so broad, so we only study the realization technologies of the visualization of system in detail in the thesis.