Simulation Research On The NC Machining Technology Of Piston Irregular Surface

With the development of the technology and the production, the quality and the production efficiency of products are more and more highly demanding. The automation of working operation of products is the most important measure to achieve the high quality and high efficiency. Piston is the important part of the gas engine, which can transform the energy. With the improvement of the capability and the dynamic index of the gas engine, the piston shape is more and more complicated, and its manufacturing is more difficult and required more accuracy. The application of the solid profile modeling turning is wide now. But the profile modeling must be remanufactured and the equipment must be adjusted as the workpiece is changed. This not only needs plenty of manual labor and prolongs the preparatory periods in the production, and it is also difficult to obtain the higher machining accuracy of the workpiece because of the effect of the machining error of the profile modeling.Numerical control technique is advanced technology, which can compute and manage the control information digitization in the mechanical process with the computer. Moreover, it can control the mechanical executive component automatically by the high-powered driven element. It is the foundation of the manufacturing which can achieve automation, flexibility, and integration.Firstly, we research and summarize the technology of CAD/CAM/CAE and the numerical control machining. Based on the research of piston line shape, using the Pro/ENGINEER of parameterization formative technique, a three-dimensional solid model of R175 aluminum piston on a diesel engine is made. By discussing the characteristics and the process scheme of pistons processing, the manufacturing model and the cutter position data file is established in the NC manufacturing module of the Pro/ENGINEER and then is processed to the NC machining program. Then we realize to drive the NC machine tool to manufacture the workpiece, and make the turning simulation in the simulation system, the validity and practicality of the theory is tested.By the researching of the subject, we study the line shape theory and machining technology of the piston irregular surface, and analyse the applications and development of CAD/CAM, and provide reference for the CAM industry.