基于西门子PLC机械手控制系统毕业设计.doc

基于西门子 PLC 机械手控制系统设计 摘 要 可编程控制器是在继电接触控制器的基础上,结合先进的微机技术发展起来的 一种新型的工业控制机。它发展迅速,应用广泛,特别适合于顺序控制,是机械自动 化中一种基础的控制设备。它将填补继电接触控制与微机数控之间的一大块空白。 此机械手系统是一个教学模型，它模拟工业生产过程中的某种自动化设备，可 以完成零组件的组装、检测、移送等任务。本文以该模型为例，论述了机械手的结 构组成及工作原理，提出了五种工作方式的控制要求，并针对这些控制要求提出了 S7-300 型 PLC 控制系统的控制方案，进而阐述了 PLC 控制系统的设计过程以及步 进程序的梯形图实现方法，并在 PLC 系统上进行了调试。实践证明，此机械手能 按预定的顺序动作，设计方案合理，控制特性良好，对应用 PLC 进行工业设计有 一定的借鉴作用。 关键词 ：机械手，PLC，控制，西门子 I 基于西门子 PLC 机械手控制系统设计 Abstract PLC is a new-style industry control, based on the control of relay-contact instruments and combined with advanced computer technology. It has developed fast and is widely used, in particular, it is quite suitable for the control of sequence. And it becomes a basic equipment of mechanic automation. PLC will fill a wide gap between the control of relay- contact and computer NC. This manipulator system is a teaching model, which simulates some automation equipment in the process of industrial production, and can complete the task of assembling, testing, transferring the components and other tasks. Taking this model as an example, this paper describes the composition, the structure and the working principle of the mechanical hand. It also puts forward the control requirements of five working methods and the control program of S7-300 type PLC control system, then expounded the design process of the PLC control systems and the procedures of the ladder step, which has been debugged on the PLC system. Practice has shown that this mechanical hand can act accordin g to the scheduled order, and has reasonable design and good control, which can give some reference to the industrial design of the PLC application. Key words：manipulator，PLC, control, simens II 基于西门子 PLC 机械手控制系统设计 目 录 第一章 绪 论...................................................... 1.1 研究背景 ...