Iibholiti ezibunjwe ngu-U ziindawo ezingezizo eziqhelekileyo ezisetyenziswa ukulungisa iibhubhu ezifana nemibhobho yamanzi okanye imithombo yamaphepha efana nemithombo yamagqabi emoto. Ngenxa yobume be-U, inokudibaniswa kunye namantongomane, ngoko ke ikwabizwa ngokuba yi-U-shaped bolts okanye iibholiti zokukhwela.
Iimilo eziphambili zeebholiti ezibunjwa ngu-U ziquka i-semicircle, i-angle ye-square yasekunene, unxantathu, unxantathu oblique njalo njalo. Iibholiti ezibunjwe ngu-U ezineempawu zemathiriyeli ezahlukeneyo, ubude, ububanzi kunye namandla amabakala anokukhethwa ngokweemo ezahlukeneyo zokusetyenziswa kunye neemfuno.
Uneendlela ezininzi zokusetyenziswa, ngokukodwa ezisetyenziselwa ukwakhiwa kunye nokufakwa, ukudibanisa iinxalenye zemishini, izithuthi kunye neenqanawa, iibhuloho, iitonela, oololiwe kunye nezinye iindawo. Kwiilori, ii-U-bolts zisetyenziselwa ukuzinzisa indawo yemoto kunye nesakhelo. Ngokomzekelo, intwasahlobo yeqabunga idityaniswe ngamabholithi a-U.
Ukukhetha ibakala lebholt.
Amabakala e-Bolt ahlala ahlulwe abe ziindidi ezimbini: iibholiti zamandla aphezulu kunye neebholiti eziqhelekileyo. Xa ukhetha ibakala le-bolt, kufuneka liqwalaselwe ngokwendawo yesicelo, iimpawu zamandla, izinto eziluhlaza kunye nokunye.
1. Ukususela kumbono wezinto eziluhlaza: iibholiti eziphezulu zenziwe ngezixhobo eziphezulu, ezifana ne-45 # insimbi, i-40 ye-boron steel, i-20 manganese titanium boron steel. Iibholiti eziqhelekileyo zenziwe ngentsimbi ye-Q235.
Mbini.. Ngokubhekiselele kwibakala lamandla, iibholiti eziphezulu ezisetyenziswa ngokuqhelekileyo ziyi-8.8 kunye ne-10.9, apho i-10.9S isetyenziswa kakhulu. Amanqanaba okuqina eebholithi eziqhelekileyo ngu-4.4, 4.8, 5.6 no-8.8.
3. Ukususela kumbono weempawu zomatshini: iibholiti eziphezulu zisebenzisa i-pre-tension kunye nokudlulisa amandla angaphandle ngokungqubuzana. Kwelinye icala, uqhagamshelo lwebholiti eqhelekileyo luxhomekeke kuxhathiso lwe-shear lwentonga yebholiti kunye noxinzelelo eludongeni lomngxuma ukuhambisa amandla okucheba, kwaye i-pre-tension incinci kakhulu xa iqinisa i-nut. Ngoko ke, iimpawu zomatshini kufuneka ziqwalaselwe kwisicelo.
4. Ukususela kumbono wokusetyenziswa: ukudibaniswa kwebholiti yamacandelo aphambili esakhiwo sokwakha ngokuqhelekileyo kudityaniswe ngamabholiti aphezulu. Iibholiti eziqhelekileyo zingaphinda zisetyenziswe, ngelixa iibholiti eziphakamileyo azikwazi ukuphinda zisetyenziswe kwaye zisetyenziselwa uxhulumaniso olusisigxina.
Ngelizwi, xa ukhetha ukucaciswa kunye nenqanaba lebholithi yebholithi emilise u-U, kufuneka sithathele ingqalelo imathiriyeli, umgangatho wamandla kunye neempawu zoxinzelelo lwebholi ngokwemfuno eyiyo kunye nokusetyenziswa kokusingqongileyo, kwaye ukhethe imveliso efanelekileyo ukufikelela kwisiphumo ukhuseleko, uzinzo nokuthembeka.