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1、華北電力大學(xué)本科畢業(yè)設(shè)計(jì)（論文）變速箱箱體臥式雙面銑削組合機(jī)床控制系統(tǒng)設(shè)計(jì)摘要本課題是根據(jù)已給出的參數(shù)，設(shè)計(jì)出某組合機(jī)床的液壓系統(tǒng)，具體包括液壓傳動(dòng)系統(tǒng)設(shè)計(jì)和電氣控制系統(tǒng)設(shè)計(jì)。對(duì)于液壓傳動(dòng)系統(tǒng)設(shè)計(jì)，要使系統(tǒng)完成“夾緊缸夾緊工作臺(tái)快速接近工件工作臺(tái)進(jìn)給工作臺(tái)后退夾緊缸松開(kāi)原位停止”的工作循環(huán)。根據(jù)此要求，設(shè)計(jì)出液壓回路，再根據(jù)參數(shù)，選擇符合要求的液壓元件，例如液壓泵、液壓閥、濾油器、行程開(kāi)關(guān)等；對(duì)于非標(biāo)準(zhǔn)件液壓缸，則要確定所有尺寸，選擇合理結(jié)構(gòu)形式，用AUTOCAD軟件繪制出裝配圖；系統(tǒng)設(shè)計(jì)完成后，要對(duì)系統(tǒng)進(jìn)行性能驗(yàn)算，例如回路壓力損失驗(yàn)算
2、、油液溫升驗(yàn)算等，以確定系統(tǒng)是否符合實(shí)際要求。對(duì)于電氣控制系統(tǒng)設(shè)計(jì)，現(xiàn)在，由于PLC可靠性高、編程簡(jiǎn)單、使用方便、體積小、重量輕等優(yōu)點(diǎn)，普遍采用PLC控制來(lái)代替繼電器接觸器控制，本系統(tǒng)也采用PLC控制。根據(jù)系統(tǒng)的輸入輸出性質(zhì)、對(duì)相應(yīng)功能、I/O點(diǎn)數(shù)、系統(tǒng)容量的要求，選擇合適型號(hào)的PLC，PLC選定后，分配I/O點(diǎn)并繪制PLC外部接線圖，確定輸入輸出信號(hào)與I/O點(diǎn)的對(duì)應(yīng)關(guān)系，最后設(shè)計(jì)出程序，并修改，直至符合要求。關(guān)鍵詞：液壓傳動(dòng)；液壓控制；PLCGEAR-BOXHORIZONTALDOUBLE-SIDEDMILLINGCOMBINATION
3、MACHINETOOLSCONTRONLSYSTEMDESIGNAbstractThistopicisalreadygivenparametersaccordingto,thedesigngivesacombinationmachinetoolssystem,specificincludinghydraulictransmissionsystemdesignandelectricalcontrolsystemdesign.Forthehydraulictransmissionsystemdesign，tomakethesystemtoac
4、complishthejobcycleofcombinationmachinetoolssystem--clampingcylinderforclamping–workbenchfastapproachingworkpiece—workbenchfeeding—workbenchback—clampingcylinderloosen—In-situstop.Accordingtothisrequirement,designahydrauliccircuit,then,accordingto28I華北電力大學(xué)本科畢業(yè)設(shè)計(jì)（論文）parame
5、ters,selecttomeettherequirementsofhydrauliccomponents,suchashydraulicpumps,hydraulicvalves,filters,Travelswitch,etc.Fornon-standardhydrauliccylinders,willhavetodetermineallsizes,choosetherightstructure,then,mappingtheassemblydrawingbyAUTOCAD.Afteraccomplisheddesign,therea
6、resomecheckingofsystemperformance,suchasthecheckingofthecircuitpressurelossandtheoiltemperaturerise,todeterminewhetherthesystemmeettheactualrequirements.Toelectricalcontrolsystem,nowadays,toPLC,becauseofitshighreliability,convenientuse,simpleprogramming,smallsize,lightwei
7、ght,etc.,itiswidelyusedtoinsteadofrelayandcontactor.So,thiselectricalcontrolsystemusesPLC,too.Accordingtothenatureofthesysteminputandoutput,thedemandofcorrespondingfunctions,I/Opointsandsystemcapacity,choosethesuitabletypeofPLC,afterthat,distributeI/Opointsandexternalwiri
8、ngdiagramofPLCtodeterminetheinputandoutputsignalsandI/Opointsofcorrespondence,finally,designthep
