毕业论文--基于plc包装码垛生产线控制系统硬件设计.doc

摘 要 在工业生产中，有很多地方需要对粉末状或小颗粒状散状固体的流量进行准确的测量和控制，再配以给料设备组成定量给料控制系统。它是集喂料、流量测量和控制于一身的设备。目前，作为许多生产设备的定量给料控制系统己广泛应用于水泥、冶金、建材、电力、化工、食品、矿山、粮食等各行各业。定量给料在工业生产中发挥着越来越重要的作用，正因为其应用的广泛性，如果能提高给料系统的精度、自动化程度，就有着重要的现实意义。 包装码垛自动生产线适用于石油化工、化肥、粮食、港口等行业，可对PP、PE粒子、PVC、化肥、粮食等粉状、颗粒状物料进行全自动包装码垛作业，便于用户储存、运输和销售，全自动包装码垛生产线主要由自动定量包装机、自动上袋机组、封口系统、倒袋机、金属检测机、重量检验机、检选机、喷墨打印机、码垛机等单元组成。通过可编程序控制器对整个生产线的工作过程进行自动控制，对运行过程中出现的故障或供料不足，供袋不及时、出垛不及时等，进行声光报警。该设备具有操作简单，运行可靠，维修方便等优点。 关键词：控制系统,包装码垛生产线,可编程序控制器ABSTRACT Industrial production, there are many places need for powdered or granular solids flow for accurate measurement and control, with feeding device consisting of quantitative feeding control system. It is a feeder, flow measurement and control in a device. At present, production equipment as many quantitative feeding control system has been widely used in cement, metallurgy, building materials, electric power, chemical, food, mining, food and other industries. Quantitative feeding in industrial production is playing an increasingly important role, because of its wide application, if can improve the feeding system precision, the degree of automation, it has important practical significance. Automatic bagging palletizing line is used in the industries of petrochemical, fertilizer, food processing, and transportation port etc. It can perform bagging and palletizing automatically for powder and granular materials such as chemical fertilizer, plastic granules (PP/PE/PVC) and grains etc. It is easy for customers to store, transport and sale their products. Automatic bagging palletizing line consists of auto-weighing bagging machine, auto-bag feed group, sealing system ,bag turn down machine, metal detector, sorting machine, jet printer and palletizing machine etc. units. Through programming controller, the whole system process can be automatic controlled. Any process operation troubles, not enough feeds, bag feeding not due or palletizing not in time all can be alarmed by sound or light. It has the adva