（毕业设计论文）《短轴料倒角机PLC控制系统》.doc

摘 要 自动剪板机是一种按用户要求将大块金属板材进行剪切，并由送料车运送到下一工序的自动化加工设备，自动剪板机作为一种自动化机械设备在钢铁加工企业中的地位己经越来越重要，并且正被广泛应用于金属板材制品加工企业。 本文是针对剪板机自动控制系统进行设计，设计中采用单片机89C52 作控制器，通过对系统硬件和软件的设计，实现对剪板机生产过程的自动化控制。该设计通过位置检测开关，检测剪板机各工序的状态，自动控制剪板机的工作，同时进行剪切计数，实现剪板机多工序的自动化控制。 论文重点研究了系统的硬件电路构成， 根据系统需求，选择2片8255A扩展了并行I/O接口，研究设计了电机过载检测电路、计数采样输入电路、系统工作状态检测输入电路、外控输出电路、声光报警电路、键盘电路、显示电路及电源电路等。 软件设计中采用汇编语言编程，进行了主程序流程图设计、键盘扫描子程序、显示子程序、工作状态监测子程序、电机过载监测等子程序设计及仿真调试。 本文设计的自动剪板机控制系统具有抗干扰能力强，集成度高、加工精度高、结构简单，价格便宜，操作方便，自动化水平高等功能特点。 关键词：单片机；剪板机；位置检测；光电传感器 Abstract The automatic machine is used to cutting metal ,it is according to user requirements will piece of metal plate shear, and then sends the next working procedure furnaces of automation processing equipment,the automatic machine as a kind of automatic mechanical equipment in the iron and steel processing enterprise in the position have been more and more important.Now it is being widely applied in sheet metal products processing enterprise. This paper is aimed at cutting machine automatic control system design, and use 89C52to be controller, through to the system hardware and software design, realize the cutting machine automation for production process controlling. This design through the position detection switch, test plate shears the process of state, automatic control cutting machine work, at the same time, realize the shear count plate shears the process automation control. The design lays emphasis on the research of the system hardware circuit structure, according to the system demand, it selects two 8255A to expanded the parallel I/O interface, studying design the motor overloaded detection circuit, count sampling the input circuit, system testing input circuit, the state control output circuit, sound and light alarm circuit, keyboard circuit, display circuit and power circuit, etc. Software design with assembly language programming, the main program flowchart design, the keyboard scan subroutines, display a subroutine, work condition monitoring procedure,