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介绍了中凸变椭圆活塞数控车削系统的构成及特点、活塞加工原理、控制软件的设计等项内容。汽车发动机活塞的形状复杂，传统的靠模加工法柔性差，不能满足现在汽车类型多样化、产品更新换代快的要求。本文所介绍的数控系统很好地解决了这一问题，它采用多级ＣＰＵ的控制方法和多层次模块化的软件设计思想，很好地满足了活塞加工的要求，并且具有功能强大、界面友好、活塞设计数据的输入和修改方便、柔性好等特点。该系统现已通过了工厂７２ｈ考机，并形成了正式产品。
The composition and characteristics of CNC turning system with convex oval piston, the principle of piston machining and the design of control software are introduced. The shape of automobile engine piston is complex, and the traditional mold-processing method has poor flexibility and can not meet the current requirements of diversified automobile types and quick product replacement. This article describes the numerical control system to solve this problem, which uses multi-level CPU control method and multi-level modular software design ideas, well meet the requirements of piston processing, and has a powerful, user-friendly , Piston design data input and modify convenience, good flexibility and so on. The system has passed the factory 72h test machine, and formed a formal product.