仿形液压铣床的plc控制系统设计毕业设计

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1、仿形液压铣床的PLC控制系统设计开题报告一、背景、现状及发展趋势20世纪末期，可编程控制器的发展特点是更加适应于现代工业的需要。从控制规模上来说，这个时期发展了大型机和超小型机；从控制能力上来说，诞生了各种各样的特殊功能单元，用于压力、温度、转速、位移等各式各样的控制场合；从产品的配套能力来说，生产了各种人机界面单元、通信单元，使应用可编程控制器的工业控制设备的配套更加容易。目前，可编程控制器在机械制造、石油化工、冶金钢铁、汽车、轻工业等领域的应用都得到了长足的发展。21世纪，PLC会有更大的发展。从技术上看，计算机技术的新成果会

2、更多地应用于可编程控制器的设计和制造上，会有运算速度更快、存储容量更大、智能更强的品种出现；从产品规模上看，会进一步向超小型及超大型方向发展；从产品的配套性上看，产品的品种会更丰富、规格更齐全，完美的人机界面、完备的通信设备会更好地适应各种工业控制场合的需求；从市场上看，各国各自生产多品种产品的情况会随着国际竞争的加剧而打破，会出现少数几个品牌垄断国际市场的局面，会出现国际通用的编程语言；从网络的发展情况来看，可编程控制器和其它工业控制计算机组网构成大型的控制系统是可编程控制器技术的发展方向。可编程控制器以其简单易懂、操作方便、可

3、靠性高、通用灵活、体积小、使用寿命长等一系列优点，在汽车、钢铁、航空航天、船舶、化工、纺织、食品、造纸、军工等工业领域获得了广泛的应用，它的功能丰富，渗透到了位置控制、温度控制、CNC等各种工业。PLC应用于铣床，使铣床自动化程度得到提高。PLC易学易懂、控制简单，可使数控铣床使用得到普及，提高生产效率。由于体积小很容易装入机械内部，是实现机电一体化的理想控制设备。PLC用存储逻辑代替接线逻辑，大大减少了控制设备外部的接线，使控制系统设计及建造的周期大为缩短，使同一设备经过改变程序改变生产过程成为可能，这很适合多品种、小批量的生产

4、场合。这样使得机床的灵活性增强，适应现在市场多变，产品跟新速度快的现象。二、设计目的通过本次毕业设计使自己对PLC在数控铣床中的应用有更加充分的认识，进一步掌握系统工作流程图的制作，PLC的选型、程序的编制。三、设计工作1、概述2、整体设计3、硬件设计4、PLC控制软件设计四、时间安排第一周：查阅并收集资料，确定设计题目。第二周：确定整体设计方案并编写设计开题报告。第三～七周：具体硬件、软件设计，实现控制要求。目录摘要·························································

5、···············21概述········································································31.1铣床的介绍·····························································31.2自动铣床的发展及现状···················································32整体设计····································

6、································43硬件设计···································································43.1PLC的特点及主要功能···················································43.2PLC型号的选择·························································53.3液压仿形铣床行程分析··············

7、·····································83.4PLC的I/O地址分配图···················································133.5PLC外部接线图························································154PLC控制软件设计····························································164.1系统工作流程图···········

8、·············································164.2梯形图································································17结论···