毕业设计（论文）-PLC在工业物料及物流分拣传输中的应用.doc

PLC在工业物料及物流分拣传输中的应用
摘要
随着商品品种的增多,配送中心的增多,多品种、高频次、随机性的商品分类作业,20世纪90代后得到迅速发展。出错率高、费时费力的人力分类作业,很快被自动分拣机及其系统所替代,开始于邮政包裹分拣系统,目前广泛应用于流通、商业的物流中心和配送中心。物料分拣自动控制系统,以前常采用传统的工艺和继电器控制,体积庞大,布线复杂,元件使用寿命较短,损耗大,性能不可靠,经常出现故障。本系统把原来继电线路顺序控制改为PLC控制;行程开关定位改为电感式接近开关定位;采用气缸气动以节约能源也利于环保大幅度提高了设备控制性能,有效地降低了设备故障。机械手的积极作用正日益为人们所认识,其一,它能部分地代替人的劳动并能达到生产工艺的要求,遵循一· 定的程序、时间和位置来完成工件的传送。因为,它能大大地改善工人的劳动条件,加快实现工业生产机械化和自动化的步伐。因此,受到各先进单位的重视并投入了大量的人力物力加以研究和应用。尤其在高温、高压、粉尘、噪声的场合,应用得更为广泛。在我国,近代几年来也有较快的发展,并取得一定的成果,受到各工业部门的重视。在生产过程中,经常要对流水线上的产品进行分捡,本课题拟开发物料搬运机械手,利用可编程技术,结合相应的硬件装置,控制机械手完成各种动作。本文主要是对PLC控制机械手对物料分选及传输进行大致的介绍。
关键词:PLC控制机械手变频器
目录
一、生产线系统的概述··············································(1)
1生产线系统的概述·············································(1)
二、PLC应用系统设计基础知识······································(2)
···································(2)
··················································(3)
三、PLC控制系统硬件设计·········································(4)
·········································(4)
、闸刀开关的选择
····································(5)
·····································(6)
,电动机的选择·······································(6)
四、控制设计······················································(7)
··················································(7)
·················································(9)
·············································(10)
·········································(11)
五、总结·························································(17)
参考文献·····················································(17)
一、生产线系统概述
设计一条对物料进行材质辨识、分拣及统计的生产线系统。系统由(1)供料机构(2)气动机械手(3)交流变频皮带输送线(4)物料辨别传感器(5)物料分拣气缸(6)PLC模块(7)变频器模块(8)电源模块(9)按钮指示灯模块等组成。生产线系统的工作要求如下:
1、系统的原点位置:机械手处于在左边、上升、缩回和气动手指张开位置;提升机构在下降位置;皮带输送线停止;物料分拣气缸在后退位置;
2、统处于停止状态而且处于原点位置时,按下启动按钮SB5,系统启动,运行指示灯HL1亮;
3、启动后,物料提升架上的物料检测光电传感器开始检测,如无料,则待料指示灯HL2闪亮,同时启动供料盘旋转,送料至物料提升位置。如供料盘运行15秒后都没有物料到达物料提升架,报警器报警,当有工件到达提升架时,报警声停