大型曲轴数控车铣机床进给系统的技术研究

沈阳理工大学硕士学位论文大型曲轴数控车铣机床进给系统的技术研究姓名：李瑞申请学位级别：硕士专业：机械制造及其自动化指导教师：张志军2011-06matlabAbstractCrankshaftisthekeypartofmarinediesel,andplaysimportantroleinship’ssecurity.Asaresultofheavygravity,specialmaterialdemandandhighaccuracy,largecrankshaftisverydifficulttoprocess.Whetheranationhasthecapacityofmanufacturinglargecrankshaftrepresentsthelevelofequipmentsection.Atpresent,onlyseveralcountriessuchasJapan,Koreacanproducelargecrankshaft,andtheyhighlymonopolizedthecrankshaftmarket.It’ssignificanttostrengthentheresearchofequipmentandprocesstechnologyoflargecrankshaft,raisetheprocessefficiencyandtechnicallevel.Aimingathighefficiencyandhigh-precisionprocessingproblem,turn-millingtechnologyisusedinshipcrankshaftmachining.Thefeedingsystemofturningandmillingmachinewasdesigned,andthecuttingforce,feedingmechanism,theperformanceofservosystemwereanalyzedonthetheoreticalstudyinthispaper.Themaincontentsareasfollowing:Theworkingprincipleofturn-millingmachineandprocesstechnologyoflargecrankshaftwasstudiedatlength.Thereweretwodifferentkindoftechnologicalprocessing,cuttingforcewasdiscussed.Themathematicalmodelofcoaxialturningandmillingmachinewasbuilt,andinstantcuttingforceexpressionswasobtained.Takingtheinfluenceofcuttingparameterstoprocessingqualityintoaccount,suitablecuttingparameterwasselected.Accordingtoempiricalformula,thepracticalcuttingforcewascalculated.Themechanismoffeedingsystemandrotarytablewasanalyzedintheory,especiallyfordual-drivemechanismandcoaxialhydraulicservobalancemechanism.Besides,thebasebearcomplexforce,andthefiniteelementanalysiswasdoneinANSYS.Bychangingthelocalstructureaccordingtothemodeofvibration,theintegralstructurewasimproved.ThestructureofservofeedingsystemwassimplifiedandthemathematicalmodelofACservofeedingsystemandmachinedrivensystemwasbuilt.Thestepresponsewassimulatedinmatlabfortheboth.Theresultsproofthatthefeedingsystemresponsewasrapid,andrunningsmoothly,canachievethedesignrequirementoffeedingsystemKeywords:Largecrankshaft;turn-millingmachine;cuttingforcemathematicalmodel;servofeedingsystem:1111.1[1][2-3]1.1[4][5]1.11.3[6]2,,[7][8][9]1.21.3[10]1.21.2.190211.4CNC355.513200141.41.51.5[11]2001[12]1:22004,42008[13]2009ANSYS[14]ABAQUS[15]20092011[16]9020083200517.560200815506.74150500200878K90MCC162001.2.2HyundaiDoosanKoBelcoViTKVICESidenor[17][18]R8071702008250400840020071202008160100,31.361.3.1[19][20][21-22](1)(2)(3)30%(4)(5)(6)17(7)(8)CNC(9)(10)1.3.220[23-24]20902002[25]2004[26]2005[27][28][29]81.3.3DermstadtSchulz20801955H.Weber[30]1983K.P.Sorge[31][32]AachenDarmstadt11CAD/CAMDarmstadtShultz.HWildauerKurbelwellenGmbHRavensburgSeco10m20t194-5114050%MANB&WDieselA/SHoleby,Denmark1997RavensburgCNC10tRa0.21.41.4.120021.61.7CNC5000,8000110[33]1.61.751.4.212345matlab621122.12.1“”“4”2.12.2,122.21.2.3.4.5.6.7.8.9.10.2.3213[34]2.22.42.339.2857453200KWΦ5500mm140mm0.610r/min4545*3=135320mm3[35]5.5m14FxFyωZXFzY2.52.62.532.660zFxFyF2.4[36][37]215SSrh()ap,USp,SSa()USh()2.72.7)(USp,ϕa)(USϕh)(SSp,ϕaϕSShϕ2.4.1[38]12390°0°90°45FpwnLZZnλ==FnwnZ2.8162.82.4.21ϕ2ϕ3ϕ2.4.2.11ϕ2ϕ3ϕ3ϕ3ϕ3ϕ2.92172.92.10aOO=1bBO=1ROC=rCO=1()222RBCba=+−2-1222rBCb=[phone]−+−=aRrarBC2-32.9parRa−+=2-42.42.3()()2p222p22−+−+−+−=arRRrarRrBC2-5BKBKsinsinθϕRrBC==rBCarcsinBK=ϕ2-6RBCarcsinBK=θ2-7rBCarcsin22BK3==ϕϕ2-8182.103ϕ3ϕ1ϕ2ϕ2.111aBK1ϕϕϕ−=2-92aBK2ϕϕϕ+=2-102.111ϕ2ϕ219BKϕ2-61aϕ2aϕ2-92-101ϕ2ϕ2.112ODOra2sinsinWθκ=ra2sinarcsinπWθκ⋅−=22sinarcsinWW1aθθϕ−⋅=ra2-11ZZnnλθπ2π2FWW⋅=⋅=2.112OCO2a222cos2θaRaRCO−+=WBK2aθθθ−=22a2asin'sinCORθϕ=()()WBK22WBK2acos2sinarcsinθθθθϕ−−+−=aRaRR2-122-42-112-122-92-10()22sinarcsinWWpBK1θθϕϕ+⋅−+−=rarR2-13()()()()WBKp2p2WBKBK2cos2sinarcsinθθθθϕϕ−−+−−++−+=arRRarRRR2-142.4.2.22.1220()1111ptOArABa−==ϕ2-1511OA)(ptϕa2.1211OOA()Raϕϕβ−−=BK1sinarcsinπ2-16()BKBK1sinarcsinϕϕϕϕα−+−=Ra2-1712211cos2αaRRaOA−+=2-182-42-172-182-15()()()()()−+−−+−+−+−+−=BKBKpp22pptsinarcsincos2ϕϕϕϕϕRarRRarRRarRra2-192.4.32212.4.3.12.102.11()()()()≤≤=≤−==32ptUS22121US1USϕϕϕϕϕϕϕϕϕϕahOErhh2-20()ϕpta2-1921OE()ϕUSh21OE21OOOZβ21OO2πWZθβ−=2-212.132.13211OOE1βBKZ1ϕϕββ−+=2-22211OOE221121121sinsinarcsinsinβββ+=rOOrOE2-232sin2W21θaOO=2-242-42-212-222-242-23()−+−−+−−++−+−=BKwBKwpBK212πsin2sin2sin2arcsin2πsinϕϕθϕϕθπθϕϕθrarRrOEww2-252.192.252.20()()()()()()≤≤−+−−+−+−+−+−≤−+−−+−−++−+−−=32BKBKpp22p21BKWBKWpBKWUSsinarcsincos22πsin2πsin2sin2arcsin2πsinϕϕϕϕϕϕϕϕϕϕϕϕθϕϕθθϕϕθϕRarRRarRRarRrrarRrrhw2-262.2.4.32.14()EFfa−=aUSp,ϕ2-27afEFGEF2-272232.14EFGΨ()paπ2tanaRf−=Ψ2-28EFGFGEF2.14()()BKBKsinsinϕϕϕ−+=rFG2-29Ψ=tanFGEF2-305.1.285.1.295.1.305.1.27()()()()pBKBKaaUSp,π2sinsinaRrffa−−+⋅−=ϕϕϕϕ2-312.4.42.4.4.12.82.122.13()()()()()()≤≤−=≤==21USptSS2p,1ptSS1p,SSp,0ϕϕϕϕϕϕϕϕϕϕϕhaaaaa2-32242.14()ϕpta2-19()ϕShU2-262.4.4.22.7hSSϕFWaSSZnnfh=2-332.4.5()()()FcUSUSp,FcUSc,yhaCFϕϕϕ⋅⋅=2-34()()FcSSSSp,FcSSc,yhaCF⋅⋅=ϕϕ2-352.52.5.142CrMo434CrNiMo630Cr3W42CrMoS34MnV[39]45#1.8MPa42CrMo225[40]TiCYTYTM30798YTM30WC—TiC—TaC—CoWC1.5—1.7µCoTaC42CrMo2.5.2()/cVmmmin()/afmmr()/zfmmz()pa