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3吨蒸汽锤改造为电液锤设计说明书毕业论文.doc

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3吨蒸汽锤改造为电液锤设计说明书毕业论文.doc

I摘要自由锻锤是利用冲击能量使金属产生塑性变形的锻压设备。由于其具有操作方便、功能性强、结构简单、造价低廉、打击能量大等特点,目前仍是我国锻造行业中锻件生产的主要加工设备。蒸汽锤是工厂中常见的一种锻锤,它是以蒸汽或压缩空气作为动力源,实现其锻造功能。但其能源利用率低,况且蒸汽锅炉能源消耗大,热效率低,环境污染严重,故障率高,属于淘汰设备。根据我国国情,将其改造为电液锤是最适宜的一种方法。改造可保留原有机架、砧座及其它基础设施,只需将原蒸汽锤气缸去掉,更换上电液锤驱动头即可。本设计主要进行了电液锤电气部分的设计,即根据3T电液锤的工作原理和控制要求,利用西门子S7200系列PLC为主控元件进行并实现了控制系统的软硬件设计。该系统工作可靠,使用方便,操作简单,功能齐全。关键词电液锤控制系统PLCIIAbstractTheforginghammeriscausesthemetalusingtheimpactenergytoproducetheplasticdeformationforgingandstampingequipment.Becauseithastheeaseofoperation,thefunctionalitystrongly,thestructuresimple,theconstructioncostinexpensive,theattackenergybigandsoonthecharacteristics,atpresentstillforgedthemainprocessingequipmentforourcountrywhichintheprofessiontheforgingproduced.Thesteamhammerisinthefactorythecommononekindofforginghammer,itistakesthepowersupplybythesteamorthecompressedair,realizesitsforgingfunction.Butitsenergyconsumesinabigway,thethermalefficiencyislow,theenvironmentalpollutionisserious,thefailurerateishigh,belongseliminatestheequipment.Accordingtoourcountrynationalcondition,itstransformationfortheelectricityliquidhammeristhemostappropriateonemethod.Thetransformationmayretaintheoriginalrack,theanvilandotherinfrastructure,onlymustremovetheoriginalsteamhammeraircylinder,exchangestheelectricityliquidhammertodrivetoinitiatethen.Thisarticlemainlyintroducedtheelectricityliquidhammerelectricitypartdesign,namely3Telectricityliquidhammerprincipleofworkandcontrolrequest.ElaboratedwestoffamilyhouseholdPLCisthemastercontrolpartcontrolsystemsoftwareandhardwaredesignrealizesandapplies,thissystemworkisreliable,theeasytooperate,theoperationissimple,thefunctioniscomplete.KeyWordselehydraulichammercontrolsystemPLCIII目录摘要IAbstractII第1章改造的目的与背景.....................................................................................11.1改造的目的...............................................................................................11.2改造的背景...............................................................................................1第2章电气改造的总体设计.................................................................................32.1总体设计思想.............................................................................................32.1.1设计目标、研究内容和拟解决的关键问题.....................................32.1.2设计方案.............................................................................................3第3章三相异步电动机及低压电器的选择.........................................................43.1三相异步电动机的选择...........................................................................43.2低压电器的选择.......................................................................................43.2.1低压断路器的选择.............................................................................53.2.3接触器的选择.....................................................................................83.2.4热继电器的选择...............................................................................103.2.5其它低压电器的选择.......................................................................103.2.6电缆的选择.......................................................................................12第4章可编程控制器的选择与应用...................................................................134.1可编程控制器概述.................................................................................134.1.1PLC的产生........................................................................................134.1.2PLC的定义........................................................................................144.1.3PLC的优点........................................................................................154.1.4PLC的应用领域................................................................................164.2西门子S7200系列PLC........................................................................174.2.1S7200PLC概述................................................................................174.3S7200PLC的使用..................................................................................194.3.1电液锤控制要求...............................................................................194.3.2S7200主要技术参数......................................................................194.3.3中间继电器的使用...........................................................................24IV第5章经济效益分析.............................................................................................25结论...........................................................................................................................26致谢...........................................................................................................................27参考文献...................................................................................................................28附录1........................................................................................................................29附录2..........................................................................................错误未定义书签。

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