>> P.312
Ⅲ-181N=0.102kgf=0.2248lbs.1mm=0.03937inchTheloadsappliedoneachslideunitarecalculatedaccordingtoTable6.2onpageⅢ-9.〔Duringaccelerationatthestartofmotion〕Fr1=ΣFZ―2+Mp―ℓ=m1g+m2g―2+Mp―ℓ=100×9.8+1000×9.8――2+2169000―200≒16200Fr2=ΣFZ―2+Mp―ℓ=m1g+m2g―2-Mp―ℓ≒-5460Fa1=ΣFY―2+My―ℓ=280Fa2=ΣFY―2-My―ℓ=-280M01=M02=Mr―2=49000〔Duringconstantspeedmotion〕Fr1=100×9.8+1000×9.8――2+2010000―200≒15400Fr2≒-4660Fa1=Fa2=0M01=M02=49000〔Duringdecelerationattheendofmotion〕Fr1=100×9.8+1000×9.8――2+1850000―200≒14600Fr2≒-3860Fa1≒-280Fa2≒280M01=M02=49000❷CalculatingofratinglifeTheupward/downwardload,lateralloadandthemomentloadalongT0directionarecalculatedbytheformula(6)and(7)onpageⅢ-7,andthedynamicequivalentloadiscalculatedbyformula(10).〔Duringaccelerationatthestartofmotion〕Fre1=kr│Fr1│+C0―T0M01│=1×16200+80200―1610×49000―1000≒18600Fre2=1.19×5460+80200―1610×49000―1000≒8940Fae1=ka│Fa1│=1.28×280≒358Fae2=1.28×280≒358P1a=XFre1+YFae1=1×18600+0.6×358≒18800P2a=XFre2+YFae2=1×8940+0.6×358≒9150〔Duringconstantspeedmotion〕Fre1=1×15400+80200―1610×49000―1000≒17800Fre2=1.19×4660+80200―1610×49000―1000≒7990Fae1=0Fae2=0P1b=17800P2b=7990〔Duringdecelerationattheendofmotion〕Fre1=1×14600+80200―1610×49000―1000≒17000Fre2=1.19×3860+80200―1610×49000―1000≒7030Fae1=1.28×280≒358Fae2=1.28×280≒358P1c=1×17000+0.6×358≒17200P2c=1×7030+0.6×358≒7240│Becausethedynamicequivalentloadchangesstepwisealongthetravelingdistance,themeanequivalentloadiscalculatedfrom①inTable7onpageⅢ-14.Pm1=31SVmaxt32Vmaxt12̶(P1a3̶̶̶+P1b3Vmaxt2+P1c3̶̶̶)={1―500×(188003×100×0.1―2+178003×100×4.9+172003×100×0.1―2)}1/3≒17800Pm2={1―500×(91503×100×0.1―2+79903×100×4.9+72403×100×0.1―2)}1/3≒8000Thebasicratinglifeofslideunit1receivingthelargestdynamicequivalentloadiscalculated.Thebasicratinglifeisobtainedbytheformula(1)givenonthepageⅢ-6consideringtheloadfactorfw(seeTable1onpageⅢ-6).L1=50(C―fWPm1)3=50(74600―1.5×17800)3≒1090Lh1=106L1―2Sn1×60=106×1090―2×500×6×60≒3030Astheresultofcalculationabove,thebasicratinglifeisabout3,030hours.❸CalculatingofstaticsafetyfactorThestaticequivalentloadiscalculatedfromtheupward/downwardloadandlateralloadbyformula(11)onpageⅢ-8.〔Duringaccelerationatthestartofmotion〕P01a=k0r│Fr1│+k0a│Fa1│+C0―T0M01│=1×16200+1.28×280+80200―1610×49000―1000≒19000P02a=k0r│Fr2│+k0a│Fa2│+C0―T0M02│=1.19×5460+1.28×280+80200―1610×49000―1000≒9300〔Duringconstantspeedmotion〕P01b=1×15400+1.28×0+80200―1610×49000―1000≒19000P02b=1.19×4660+1.28×0+80200―1610×49000―1000≒7990〔Duringdecelerationattheendofmotion〕P01c=1×14600+1.28×280+80200―1610×49000―1000≒17400P02c1.19×3860+1.28×280+80200―1610×49000―1000≒7390Thestaticsafetyfactorofslideunit1duringaccelerationatthestartofmotionreceivingthelargeststaticequivalentloadiscalculated.Thestaticsafetyfactoriscalculatedbyformula(4)onpageⅢ-6.fs=C0―P01a=80200―19000≒4.2Astheresultofcalculationabove,thestaticsafetyfactorisabout4.2.││
| < 
| 
> | 
>>
