Fastener torque thiab cov teeb meem tshwm sim

Kev faib cov dej num rau fastener torque

1. PATAC yog lub luag haujlwm rau kev tso tawm dynamic torque thiab pib static torque.PATAC tso tawm dynamic torque tus qauv raws li tus qauv tsim, ua ke nrog cov txiaj ntsig kev sim thiab cov txiaj ntsig kev xeem.

2. ME yog lub luag hauj lwm rau tso tawm static torque Raws li lub zog torque tso tawm los ntawm PATAC, lub torque ntawm lub fastening cuab tam yog hloov nyob rau hauv Nominal tus nqi ntawm tus qauv dynamic torque ntawm cov kab ntau lawm.Tom qab ntawd lub static torque yog ntsuas raws li hom ntau lawm.Siv cov txheej txheem statistical (30 teev ntawm cov ntaub ntawv), Nominal thiab kam rau ua tus qauv static torque tau txais, thiab tus qauv torque zoo li qub tau txais.

Dynamic torque thiab static torque sau hom ntawv

1. Dynamic torque

D nominal +/- kam rau ua NM ;Dynamic torque yog sau nyob rau hauv daim ntawv nominal +/tolerances xws li D30 +/-5nm;Tsis muaj qhov chaw nruab nrab ntawm D thiab 30+/-5NM; Qhov twg D sawv rau Dynamic;NM yog chav tsev ntawm torque: Newton.meters;kam rau ua yuav tsum yog symmetrical kam rau ua thiab yuav tsum tsis txhob teem rau hauv daim ntawv ntawm asymmetric kam rau siab nce thiab nqis.Piv txwv li, D30 + 3/-5NM tsis raug.Hauv kev tsim khoom, tus nqi dynamic torque ntawm cov cuab yeej fastening yuav tsum yog nominal, thiab yuav tsum tsis txhob deviated los ntawm tus nqi nominal txhob txwm;

2. Static torque

SA-BNM;Lub sijhawm zoo li qub yuav tsum tau sau ua ntau hom ntawv xws li: S25-35NM;Tsis muaj qhov chaw nruab nrab ntawm S thiab 25-30NM;Qhov twg S sawv rau Static;A sawv cev rau qis qis ntawm lub zog zoo li qub, B sawv cev rau qhov txwv sab saud ntawm lub zog zoo li qub;NM yog chav tsev ntawm torque: Newton.meters;

Dynamic torque thiab static torque sau hom ntawv

3. Dynamic torque ntawm tus kheej-seated rau tes Cov tes tuav tus kheej feem ntau yog zaum raws li tus qauv FDSNS (Fully DrivenSeated Tsis stripped).Piv txwv: D1.5+/-0.5NM S1NM MIN FDSNSWhere D stands rau Dynamic(dynamic);Ua raws li qhov chaw; 1.5 +/- 0.5NM qhia qhov ntau ntawm dynamic torque, 1.5NM tsuas yog rau kev siv ntawm qhov tseeb teeb tsa torque hauv kev tsim khoom, thiab tsis qhia raws li tus nqi Nominal.Qhov tseeb dynamic torque siv yog kho los ntawm kev tsim khoom raws li qhov tseeb ntawm cov phom dynamic torque, tab sis nws yuav tsum tau xyuas kom meej tias tus qauv FDSNS (Fully Driven SeatedNot Stripped, uas yog, cov hniav tsis plam). Thaum kawg, nco ntsoov FDSNS (Txoj Kev Tsav Tsis Taus Tawm).

Yam cuam tshuam rau dynamic torque

Thaum teeb tsa dynamic torque, xav txog tsis tsuas yog fasteners, tab sis kuj fasteners thiab fastener cov cuab yeej.Qhov dynamic torque yog me heev, uas yog ib qho yooj yim ua rau loosening thiab qaug zog tawg, thiab yog tsis conducive rau tsim lub peev xwm ntawm fasteners;Lub dynamic torque yog loj heev, uas yog ib qho yooj yim ua rau fasteners tawm los, txawm tawg, plam hniav, thiab raug crushed los ntawm fasteners.Cov khoom hardness, deg roughness, deg kev sib txhuam coefficient thiab cov qauv ntawm lub fastener yuav cuam tshuam rau dynamic torque. .Nyob rau tib lub sijhawm, nws tseem yuav tsum tau xav txog lub zog ntawm lub fastener kom ntseeg tau tias nws yuav tsis raug crushed, thiab tom qab ntawd tau txais qhov siab tshaj plaws torque uas lub fastener tuaj yeem tiv taus.Dynamic torque qauv yuav tsum tau txiav txim siab los ntawm ob qho tib si fastener. fastener.Qhov tsawg kawg nkaus dynamic torque yuav tsum xyuas kom meej tias nws tsis yog xoob nyob rau hauv tus txheej txheem ntawm cov neeg siv, thiab lub siab tshaj plaws torque yuav tsum xyuas kom meej tias lub fastener thiab fastener tsis poob (xws li yielding, tawg, slipping, crushing, deformation, thiab lwm yam). Txhawm rau muab kev ua si tag nrho rau kev ua tau zoo ntawm cov fasteners, axial preload ntawm fasteners feem ntau yuav tsum yog 50 mus rau 75% ntawm qhov guaranteed load ntawm fasteners.