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金属管件气密性检测装置的控制系统设计论文[带图纸].DOC

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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ControlSystemDesignofMetalPipeAirTightnessTestDeviceAbstractIndailyproductionandmanufacturing,productionofthecastingpipefitting,container,theinternalcombustionenginecylinderheadandotherparts,inordertoensurethequalityoftheseproductsandsafetyinproduction.Detectingthesepartsoftheairtightnessshallbetaken,anddetectiondeviceautomationdesignatthesametimeisconducivetoenhancethedetectionefficiency.Thisthesisimprovedmanualdetectingdeviceofthepneumaticsystem,providedanoverviewoftheimprovedpneumaticsystemworkingprincipleandactionprocessAccordingtoallkindsofcontrolschemescharacteristic,identifiedbyusingPLCasthecoreofthecontrolsystem,andthecombinationofpneumaticcircuitdesignforcontrolsystemofdetectingdevice.ThePLCcontrolsystemthroughtheelectromagneticvalve,therebycontrollingthepneumaticcircuithighpressuregasflowdirectiontocompleteeachmovementprocess,achievingpipeairtightnesstest.Usingthesystemcanmakethedevicerealizeautomaticdetection,highdetectionefficiency.Thecontrolpanelissimple,easytooperate.Thesystemtakestheprogrammablecontrollerasthecontrolcore,whichmakesstrongantiinterferencecapability,easytomaintain,andcanbeintheruggedworkingenvironment,inordertoadapttotheindustrialdetection.KeywordsairtightnessMethodforwatertestDetectionControlsystem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

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