Automotive bolts tuaj ntau hom, feem ntau suav nrog tus qauv hex- taub hau bolts, shear bolts, countersunk shear bolts, thiab nws tus kheej- xauv txiv ntseej. Thaum nruj automotive bolts, nws yog ib qho tseem ceeb kom nruj me ntsis tswj ntau yam tseem ceeb. Ua ntej, preload yog qhov tseem ceeb tshaj plaws, vim nws cuam tshuam ncaj qha rau kev nyab xeeb thiab kev ua haujlwm ntawm kev sib dhos; tsis txaus preload tuaj yeem yooj yim ua rau loosening thiab cov qauv tsis ruaj khov. Qhov thib ob, kev tswj ntawm preload yuav tsum yog qhov tseeb-tshwj xeeb tshaj yog nyob rau hauv siab - precision mechanical pob qij txha, xws li cov uas pom nyob rau hauv lub kauj thiab cav mounts - thiab yog feem ntau ua tiav los ntawm torque los yog lub kaum sab xis tswj txoj kev.
Tsis tas li ntawd, thaum xam cov preload, cov mis F=P × A yuav tsum tau siv, thaum tib lub sij hawm coj mus rau hauv tus account lub tswv yim yam xws li kub, lubrication, thiab elastic deformation. Lub coefficient ntawm kev sib txhuam yog lwm qhov tseem ceeb ntawm kev cuam tshuam rau preload; nws yuav tsum raug xaiv raws li cov ntaub ntawv ntsuas empirical thiab hloov kho rau tus account rau cov xwm txheej tshwj xeeb, xws li cov uas cuam tshuam rau tus kheej - kaw cov txheej txheem. Thaum kawg, kev xaiv ntawm tus qauv ntsia hlau tsim nyog yuav tsum tau ua raws li qhov yuav tsum tau ua ntawm daim ntawv thov, kom ntseeg tau tias qhov tsis xws li qhov ntev thiab txoj kab uas hla raws li qhov tsim nyog tshwj xeeb los tiv thaiv kev nyab xeeb uas tshwm sim los ntawm kev teeb tsa tsis raug lossis tsis txaus preload. Kev xaiv kom raug thiab siv cov automotive bolts yog qhov tseem ceeb heev rau txoj kev tsim tsheb.
