Nc Programming System Development For The Workshop

WOP (Workshop Oriented Programming) is a new programming method for CNC machine and it's originally started in the world in the late of 90s of last century. It takes a visualized way to define the parameters for parts machining process. After postposition process, the graphics with parameters for parts machining can generate NC program automatically and the machining track can be simulated on the CNC system CTR. So the operators can program skilfully without understanding the abstract NC programming language(ISO Code). The programming time is greatly reduced, and the programming reliability and efficiency are also improved.NC machining simulation integrates manufacturing technology, machine numerical control theory, computer aided design(CAD), computer aided manufacturing (CAM), model building and simulation. Operator can feel the virtual environment of 3D model produced by the computer with eyes. When designing a new project or changing a project, operator can machine the parts, check the accuracy and rationality of the NC program, comment on and optimize the machining method in a virtual environment before actual machining. All these are to shorten the developing cycle, reduce the production cost, improve the quality of the products and production efficiency.In this system, the author develop a 3D dynamic geometry simulation system according to the existed opening NC system based on RTLinux by the way of NC code simulation with the computer simulation technology and cartoon technology based on OpenGL. So the integration of graphic programming and machining is realized.The content of this paper is followed:(1) The characteristic of WOP is analyzed and a friendly interface is established.(2) A 3-axis and graphic interactive inputting NC programming is designed. It's unnecessary for the programmer to use the abstract instruction language, furthermore, the aided calculation and the calculation for tool track are not needed.(3) The checker and translator for NC code are designed. They solve the problem of converting the WOP to NC code and simulation for cutter path.(4) The NC code editor is designed to help the user to select the programming language.(5) The author researches the 3D graphic manufacture technology base on OpenGL deeply. Blank and tool are dispersed according to the principles of triangle surface disperse method and visual disperse method. So the mathematic models of tool and blank are established.(6) Simulation model for 3D milling is designed.