Ukugquma komphezulu kwi-screw kubaluleke kakhulu njengesixhobo se-screw ngokwayo. Imisonto ye-Screw yenziwa ngokusika okanye ukwenza inkqubo yomatshini, kwaye iingubo ezingaphezulu zibonelela ngomgangatho obalulekileyo wokukhusela i-screw shank kunye neentambo.
Ukuza kuthi ga ngoku, izikrufu zizuza kakhulu kuluhlu olubanzi lweengubo zomphezulu zobunjineli ezilungelelaniswe kwisicelo ngasinye se-screw ukwenzela ukubonelela ngokugqwesa okufanelekileyo kunye nokhuseleko lokuqhekeka.
Ngamafutshane, iingubo ezingaphezulu zifakwe kwi-screws ukunyusa ukuchasana kwendawo kunye nokukhusela i-screw ekungaphumeleli kwangaphambi kwexesha ngenxa yokubola okanye ukuqhekeka.
Ke, zeziphi ezona ndlela zixhaphakileyo zokunyanga izikrufu? Ezi zilandelayo zezona ndlela zixhaphakileyo zokunyanga umphezulu wesikrufu:
1. Ukufakwa kweZinc
Eyona ndlela ixhaphakileyo yonyango lomphezulu weI-Screw yi-electro galvanizing. Ayibizi nje kuphela, kodwa inenkangeleko ethandekayo. I-Electroplating ifumaneka kumnyama kunye nohlaza lomkhosi. Nangona kunjalo, enye i-disadvantage ye-electro galvanizing kukuba ukusebenza kwayo kwe-anti-corrosion kuqhelekileyo, kwaye inomsebenzi ophantsi wokuchasana nokubola kwayo nayiphi na i-plating (i-coating) umaleko. Ngokubanzi, izikrufu emva kwe-electro galvanizing zinokuphumelela uvavanyo lokutshiza ityuwa engathathi hlangothi kwiiyure ezingama-72, kwaye i-agent ekhethekileyo yokutywina iyasetyenziswa, ukuze uvavanyo lokutshiza ityuwa emva kwe-electro galvanizing luhlale ngaphezu kweeyure ezingama-200, kodwa kubiza kakhulu. , ixabiso lamaxesha ama-5-8 njenge-galvanizing jikelele.
2. Ukucwenga kweChromium
I-chromium yokwambathisa kwi-screw fasteners izinzile kwimeko-bume, ayitshintshi lula umbala okanye ilahlekelwe yi-luster, inobulukhuni obuphezulu, kwaye iyaxhathisa ukunxiba. Nangona i-chromium yokwambathisa iqhele ukusetyenziswa njengendawo yokuhombisa kwiziqhoboshi, ayifane isetyenziswe kwimizi-mveliso efuna ukuxhathisa okuphezulu kwe-corrosion. Ngenxa yokuba i-chrome plated fasteners ibiza kakhulu njengensimbi engenasici, kufuneka isetyenziswe kuphela xa amandla ensimbi engenasici awanelanga. Ukuphucula ukuxhathisa kwe-chromium plating corrosion, ubhedu kunye ne-nickel kufuneka zifakwe phambi kwe-chromium plating. Nangona ichromium yokwambathisa inokumelana namaqondo obushushu aphezulu 1200 degrees Fahrenheit (650 degrees celcius), inengxaki efanayo embrittlement hydrogen njengoko galvanizing.
3. Isilivere kunye ne-nickel plating phezu komhlaba
Isilivere yokugquma iziqhoboshiisebenza njengesithambiso esiluqilima seziqhoboshi kunye nendlela yokuthintela umhlwa. Ngenxa yeendleko, izikrufu azisetyenziswanga, kwaye ngamanye amaxesha iibholiti ezincinci nazo zifakwe isilivere. Nangona ingcolisa emoyeni, isilivere isasebenza kwi-1600 degrees Fahrenheit. Ukuze usebenze kwizibophelelo zobushushu obuphezulu kunye nokuthintela i-screw oxidation, abantu basebenzisa ukumelana nobushushu obuphezulu kunye neempawu zokuthambisa. Iifasteners zidla ngokufakwa i-nickel-plated kwiindawo ezine-conductivity ephezulu kunye nokumelana nomhlwa. Umzekelo, i-terminal yebhetri yemoto engenayo.
4.Unyango lwe-Screw surfaceDacromet
Unyango lomphezulu weI-Dacromet ye-screw fastenersayiqulathanga i-hydrogen embrittlement, kwaye ukulayisha kwangaphambili kwetorque kuqhuba kakuhle kakhulu. Noko ke, ingcolisa ngokunzulu. Ngaphandle kokuthathela ingqalelo imiba ngechromium kunye nokukhuselwa kokusingqongileyo, eneneni yeyona ifaneleke kakhulu kwiziqhoboshi ezinamandla ezineemfuno eziqinileyo zokuchasana nomhlwa.
5. Surface phosphating
Nangona i-phosphorating ibiza ngaphantsi kune-galvanizing, inika ukhuseleko oluncinci kwi-corrosion.Iziqhoboshi zokuqhoboshakufuneka i-oyile emva kwe-phosphating ngenxa yokuba ukusebenza kweoli kunento eninzi yokwenza kunye nokumelana nokubola kwezibophelelo. Faka isicelo seoli ye-antirust jikelele emva kwe-phosphating, kwaye uvavanyo lokutshiza ityuwa kufuneka luthathe kuphela i-10 kwiiyure ze-20. I-screw fastener inokuthatha iiyure ze-72-96 ukuba i-oyile ye-antirust ephezulu isetyenzisiweyo, kodwa ixabiso liphindwe ngamaxesha angama-2-3 ngaphezu kweoli ye-phosphating. Ngenxa yokuba i-torque yabo kunye namandla okuqinisa kwangaphambili anentsebenzo entle engaguqukiyo, uninzi lwezibophelelo ze-screws zemizi-mveliso ziphathwa nge-phosphating + oyile. Ihlala isetyenziswa kwisakhiwo semizi-mveliso kuba inokwanelisa iimfuno eziqikelelweyo zokuqinisa ngexesha lokudityaniswa kwamacandelo kunye namacandelo. Ngokukodwa xa udibanisa amanye amacandelo abalulekileyo, ezinye izikrufu zisebenzisa i-phosphating, enokuthi ithintele umba we-hydrogen embrittlement. Ngenxa yoko, kwintsimi yemizi-mveliso, i-screwwith ibakala elingaphezulu kwe-10.9 idla ngokuba yi-phosphated.
Ixesha lokuposa: Feb-15-2023