Nyob rau hauv feem ntau German high-end mechanical khoom factories, lub rooj sib txoos ntawm tshwj xeeb qhov chaw thiab zawm ntawm screws yog ua tiav nyob rau hauv cov kev taw qhia ntawm nruj kev khiav hauj lwm phau ntawv, thiab muaj cov kev cai meej txog yuav ua li cas npaum li cas torque.
Qhov tseeb, tom qab cov ntsia hlau tau nruj, txhawm rau tiv thaiv kom tsis txhob xoob, yuav tsum tau siv lub zog ntxiv ua ntej, yog li lub zog ua ntej yuav raug tshem tawm tom qab loosening ib nrab tig, thiab cov ntsia hlau yog nyob rau hauv elastic deformation tom qab zawm, tshwj xeeb tshaj yog nyob rau hauv siab kub thiab vibration load. Xws li lub siab tsis tu ncua rau lub sijhawm ntev yuav ua rau nkag mus, thiab tom qab lub hau ntswj ua plastically deformed, nws lub zog yuav txo qis los yog ua tsis tiav. Rov qab ib nrab ntawm lub voj voog yog los kho qee qhov elastic deformation thiab tshem tawm cov kev ntxhov siab ua ntej nruj tib lub sijhawm. Nyob rau hauv lub neej yav tom ntej, lub deformation ntawm cov ntsia hlau nyob rau hauv tas mus li siab yog tseem nyob rau hauv elastic deformation, thiab qhov tshwm sim ntawm cov yas strain thiab tsis ua hauj lwm yog heev txo, yog li ntawd cov ntsia hlau muaj peev xwm tswj tsis tu ncua high-lub zog siab. Tab sis ncaj qha twisting ob thiab ib nrab lem yuav tsis ua tiav cov nyhuv no.
