毕业设计（论文）-双缸四柱液压机的液压系统设计和PLC控制.pdf

!!"#$%&'()*+,-.//0123456(789&:;<=>$%&7?***@ABCDE&F8GHI&J+K3E&ABCD&LME!MNO!FP7Q$RST=HI&JUCDVWXYF$%HIXY=K3VWXY&J,Z[\]%^F_%HIXY`abGcV&Fde7%Wfgh,ijfk?***@7=l$%HIXY,$%&/mno7pqAB+PrstXu$%&7vw=$%XYEqZVWxyMz{xyMHIxyF|}xy"GAB?@= !"#$%&-/m7123~GAB7m(!,~d"e=$%&7E&7m(,#$Eq%J&VWXY,#$VW&l$%HIXYZVWXY'V+(1HI$%7ijF%W+)*$%&7/m12=$%+V,-)*.V/0m+1(c$23HI4+5`)*6]`a829H=Z:$%+V7/m;<,=>?@[+ABC7D2FEAFWGH=IXY7/m%WJB]K+LMNOJBC7PQ+PQ7?@[******@WX+AKYL,-Z[\]^=[$_`+de$%[dw-c]gc_7`7fyg/m=Z:$%[75%hvFPQ+$%+Vdwijkl7+VJFc]7+Vm7+b,$%+V7nCdopq=er+$%+V7^studv&:+VMcw+Vxy,-+dlSz(F{|}~AB]7!"q#=$%$%+V&-b'()+*+>,-.L,/10(.+dl'(L,c)*=!"#$%&,81%J23MVm45M6w_gM0m-{7$%&+_u)*7t7=-89;:3(1;<C=7>?***@AFVBvwCDEy+F($%&7%+(1^+[!a~9$%f)*w=7oH+IJFnKkL@~9/0Vm+MlN8O;:O$%&7$%XYFPLC7XY;:=>$%&7EqPQRSTW6300KN,NOW1000KN+UV{2900mm,NO{2350mm+UV/mW76-10mm/s,Eq;:X,vgRY1ZS$%XYN{;:=EqCDXY7/m%WM$%!7%J[\M$%xy7]^MXY7Ili_M$%7/m`ab=Y2ZSPLCXYN{;:=EqCDPLCKcKOsdbMPLCKcKOefBghMPLC2ijIMPLCHIXYklb;:mIn= !": !"#$%&&$%XY&5j2HIoYPLCZ !"#$%153893706Abstract Widelyusedparallelbarsfour-columnhydraulicpress,monlyusedintheprocessofmachiningprocessofakindofmechanical ,includinghostandacontrol mechanism,inwhichthehostpartincludesframe,maincylinderandcylinder ofpackoutandthechargingdevice, madeupoftankofhighpressurepumpandlowvoltagecontrolsystemand ontrolsystemisanimportantpartofhydraulicpresswork operation,itisdirectlyrelatedtotheperformanceofthehydraulic ,actuators, four-columnhydraulicpressintheprocessofworktheroleofeachpartis 'sroleistoprovidethe mainstructure;Powersystemistoprovidethepower;ontrol systemdrivenbypowersystem,bycontrollingthedirectionofthehydraulic binedcontrol,canachieveahigherdegreeof ontrolandremotecon