| The using of NC machine tool in our country is not efficient. One of the main reasons is lacking of skillful programmer and operator. The traditional training mode needs expensive NC machine tools, and the errors of programming and operating will lead to damages, while the training software can carry out the training process without the real machine tool and the possible damages. A GSK980T NC lathe simulation prototype for operation-training is developed in the research.The main research works in the dissertation are explained in detail. Adopting the object-oriented techniques and VRML, the virtual workpiece, clamps and tools, 3D virtual scene is displayed quickly and realizingly. Importing, verifying, translating and processing NC code are realized by Java program. Basing the movement relationships of workpiece, turret and tailstock, the movement model is built. Considering the changes of shape and dimension from workpiece to part and using parameterization techniques, the dynamic modeling is carried out. To realize the NC turning simulation, the data and event messages are transmitted using the inter-communication among VRML-JavaApplet-Javascript. Overrun preventions are set in the environment and the friendly user interfaces are designed and browsed by HTML mode.This system based on VRML and Java technology has characteristic of general platform, realistic rendering and good expansibility, user only needs to install a free plug-in to make it operate normally through IE.
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