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Nowadays, in the course of the usage of NC machine, the method of checking NC program is one of important factors effecting on productivity.When NC program is being made,it is unavoidable for some errors to occur in program,because a lot of things have to be thought.These errors will result in waste of capital,manpower and time if they occur in the process of manufacturing.So NC program must be examined to assure it is right before it is used to production.There are usually some methods to examine NC program, such as Manual inspection, test-machining, etc. Obviously, the way of test machining reacts actively on such aspects as relieving programmer and enhancing using frequency of NC machine. But this course spends a long debugging time and a high cost, and moreover, is prone to accidents. Therefore, NC machining needs more effective and practical test methods.With computer simulated technology and computer graphic technology, this thesis analyzes simulation system of the NC lathe. The design principle of module is advanced in this thesis based on the Visual C++.NET developing environment. By using visible and face-object programming tools, this thesis develops a simulation system of NC lathe, and displays the simulating method of NC lathe processing. This simulation system can not only examine correctness and rationality of NC program, and prevent NC equipment being damaged, but also reduce higher waste and cost by test-machining before. So it reduces greatly the development cycle of new product. Moreover, Machining Process Simulation can also optimize producing, train programmer and so on.This thesis has mainly accomplished contents as follows:(1) By analyzing the simulation system of NC lathe, proposes the general design plan of the simulation system of NC lathe based on the characteristic of NC lathe.(2) By analyzing and comparing the principle of interpolation, realizes the program of interpolation module.(3) By studying ISO6983 NC code , realizes the translation module of NC code examined in grammar and Morphology.(4) Analyzing Multi-thread technology in detail, realizes NC lathe Machining Simulation based on Windows Multi-thread technology.(5) Designs the friendly Windows style interface of NC lathe Machining Simulation.(6) Realizes the help module of NC lathe Machining Simulation.
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