Research On Technology Of Digital Machine Tools Modeling And Cutting Simulation

The simulation technology of digital machining process is a key component of digital manufacturing system,and is one of the foundations of evaluation methods during product development. It is the crucial to realize digital manufacture system, and to ensure the validity and applicability of the system.In this dissertation, the simulation and modelling technology of NC machining process has been studied deeply. Aiming at the expandability of digital machining system and the reconfigurability of machining process controller for different NC systems, the object-oriented idea is adopted to analyze and design digital machine simulation system,and the modular design method is proposed to set up a process simulation environment of the digital machining platform. The main content of this dissertation is as follows:1.According to existing achievements and development of digital machining,the rules and principles of design is primarily discussed in the dissertation;According to the function requirements of the NC machining simulation,the digital machine simulation system is analyzed and designed with object-oriented method;And the base classes of digital turning and mliing machine system is established,which also introduces the whole configuration and every modules of the simulation system.2.Based on particularly researching the modeling methods of the geometric model,the digital machine simulation system adopts 3ds Max to realize the 3D modeling of static entities, which is saved as 3ds format. Then use OpenGL and VC++ as the development tool to import the 3ds file into the simulation system to realize modeling of digital equipments,which can accelerate the digital manufacturing system running.And design a interface program between 3DS files and OpenGL.3.The discretization of triangle mesh which is based on Z-MAP structure has been used in the dynamic simulation of machining process, which effectively solves the anamorphic animation of the model. The 3-D solid representation models and their data structures of machined parts are presented based on the characteristics of turning and milling processes. Upon on both structures, the milling model and turning model based on the method of triangle piece is presented.4.According to the modeling method in the paper,the system has developed a prototype of digital machine simulation system for digital manufacturing, and designed a beautiful 3D simulating environment which has graphics and music. And some key problems of develop are studied,such as the processing environment modeling method, NC program decoding process, interpolation method, cutter magazine for the definition and so on.This system adopts target's procedure design method, the procedure that develops has advantages, such as encapsulation, inheriting, much attitudes, etc, the data which have reduced the procedure are polluted, increase exchanging exploration,readability ,portability and maintainability of the procedure, have improved systematic programming efficiency greatly.