金属管件气密性检测装置的控制系统设计论文[带图纸].DOC

西安文理学院机械电子工程系本科毕业设计（论文）题目金属管件气密性检测装置的控制系统设计专业班级08级机械（2）班学号08102080212学生姓名杜迎宾指导教师韦炜设计所在单位西安文理学院2012年5月金属管件气密性检测装置的控制系统设计摘要：在日常的生产制造中，生产铸造的管件、容器、内燃机缸盖等零件，为了保证产品的品质和生产的安全，需要对这些零件的气密性进行检测，同时检测装置的自动化设计有利于提高检测效率。本文改进设计了手动式检测装置的气动系统，概述了改进后气动系统的工作原理及动作实现过程；针对各种控制方案的优缺点，确定用PLC做为控制系统的核心，并结合气动回路设计出检测装置的控制系统。该系统通过PLC控制电磁阀的开闭，从而控制气动回路中高压气体的流向，使装置完成各个运动过程，实现管件气密性检测。该系统的运用可以使此装置实现自动化检测，提高检测效率。控制面板简单，易于操作。系统以可编程控制器为控制核心，使系统抗干扰能力强、可维护性好，且可以在比较恶劣的环境下工作，以适应工业化检测。关键词：气密性；水检法；检测；控制系统ControlSystemDesignofMetalPipeAirTightnessTestDeviceAbstract:Indailyproductionandmanufacturing,productionofthecastingpipefitting,container,theinternalcombustionenginecylinderheadandotherparts,inordertoensurethequalityoftheseproductsandsafetyinproduction.Detectingthesepartsoftheairtightnessshallbetaken,anddetectiondeviceautomationdesignatthesametimeisconducivetoenhancethedetectionefficiency.Thisthesisimprovedmanualdetectingdeviceofthepneumaticsystem,providedanoverviewoftheimprovedpneumaticsystemworkingprincipleandactionprocess；Accordingtoallkindsofcontrolscheme’scharacteristic,identifiedbyusingPLCasthecoreofthecontrolsystem,andthecombinationofpneumaticcircuitdesignforcontrolsystemofdetectingdevice.ThePLCcontrolsystemthroughtheelectromagneticvalve,therebycontrollingthepneumaticcircuithighpressuregasflowdirectiontocompleteeachmovementprocess,achievingpipeairtightnesstest.Usingthesystemcanmakethedevicerealizeautomaticdetection,highdetectionefficiency.Thecontrolpanelissimple,easytooperate.Thesystemtakestheprogrammablecontrollerasthecontrolcore,whichmakesstronganti-interferencecapability,easytomaintain,andcanbeintheruggedworkingenvironment,inordertoadapttotheindustrialdetection.Keywords:airtightness；Methodforwatertest；Detection；Controlsystem目录第1页目录第一章绪论.............................................................................................................................................11.1选题的目的与意义.....................................................................................................................11.2国内外发展状况与趋势.............................................................................................................11.2.1国内外的研究状况..........................................................................................................11.2.2发展趋势..........................................................................................................................21.3课题的主要研究内容.................................................................................................................31.4本章小结.....................................................................................................................................3第二章控制系统的总体方案设计.........................................................................................................42.1气动系统的改进设计.................................................................................................................42.1.1气动回路系统的原理......................................................................................................42.1.2系统的运动过程..............................................................................................................72.2控制方案的选择.........................................................................................................................82.3控制系统的硬件结构...............................................................................................................102.3.1系统的硬件组成..........................................................................................................102.3.2系统的硬件工作原理..................................................................................................112.4本章小结...................................................................................................................................11第三章系统的硬件设计.......................................................................................................................123.1可编程控制器（PLC）的选型................................................................................................123.1.1确定可编程控制器（PLC）的类型.............................................................................123.1.2预选PLC的系列型号..................................................................................................133.2方向控制阀的选择...................................................................................................................143.2.1确定控制元件类型........................................................................................................143.2.2确定阀的机能................................................................................................................143.2.3预选阀的系列型号........................................................................................................163.3消声器的选择...........................................................................................................................173.3.1确定消声器的类型........................................................................................................173.3.2确定消声器的型号........................................................................................................183.4压力表的选择...........................................................................................................................183.4.1确定压力表的类型........................................................................................................183.4.2确定压力表的型号........................................................................................................203.5I/O分配表.................................................................................................................................213.6硬件系统接线图.......................................................................................................................213.7本章小结...................................................................................................................................22第四章系统的软件设计.......................................................................................................................23目录第2页4.1检测气密性装置的控制要求...................................................................................................234.2PLC的程序设计.......................................................................................................................234.3PLC的程序调试.......................................................................................................................264.4本章小结...................................................................................................................................27结束语.....................................................................................................................................................28致谢.........................................................................................................................................................29参考文献.................................................................................................................................................30附录.........................................................................................................................................................31