Ho roala holim'a sekoti ho bohlokoa joalo ka lisebelisoa tsa screwr ka botsona. Likhoele tsa Screw li entsoe ka mokhoa oa ho itšeha kapa oa ho etsa machining, 'me liaparo tse ka holimo li fana ka tšireletso ea bohlokoa bakeng sa shank ea screw le likhoele.
Ho finyella seo, li-screws li rua molemo haholo ho mefuta e mengata ea liphahlo tse entsoeng ka holim'a metsi tse etselitsoeng ts'ebetso e 'ngoe le e' ngoe ea screw e le ho fana ka tšireletso e nepahetseng ea ho senya le ho senya.
Ka bokhuts'oane, lipente tsa bokaholimo li sebelisoa ho li-screw ho eketsa ho hanyetsa le ho sireletsa screw ho se atlehe pele ho nako ka lebaka la ho bola kapa ho phatloha.
Joale, mekhoa e atileng haholo ea kalafo ea screw ke efe? Tse latelang ke mekhoa e atileng haholo ea kalafo ea screw surface:
1. Ho roala zinki
Mokhoa o atileng haholo oa ho phekola holim'a metsi bakeng saScrew ke electro galvanizing. Ha e theko e tlaase feela, empa hape e na le ponahalo e ntle. Electroplating e fumaneha ka botala bo botšo le sesole. Leha ho le joalo, bofokoli bo bong ba electro galvanizing ke hore ts'ebetso ea eona e khahlanong le kutu e tloaelehile, 'me e na le ts'ebetso e tlaase ka ho fetisisa e thibelang kutu ea lera leha e le lefe la ho roala (ho roala). Ka kakaretso, li-screws ka mor'a electro galvanizing li ka fetisa tlhahlobo ea ho se nke lehlakore ha letsoai ka hare ho lihora tse 72, 'me ho boetse ho sebelisoa sesebelisoa se khethehileng sa ho tiisa, e le hore tlhahlobo ea spray ea letsoai ka mor'a hore electro galvanizing e tšoarelle lihora tse fetang 200, empa e theko e boima haholo. , e bitsang makhetlo a 5-8 ho feta ho galvanizing ka kakaretso.
2. Chromium plating
Thepa ea chromium holim'a li-screw fasteners e tsitsitse tikolohong, ha e fetole 'mala habonolo kapa ho lahleheloa ke khanya, e thata haholo,' me e hana ho apara. Le hoja ho roala ha chromium hangata ho sebelisoa e le mokhabiso oa li-fasteners, ha ho sebelisoe hangata liindastering tse hlokang khanyetso e phahameng ea kutu. Hobane li-fasteners tse ntle tsa chrome plated li bitsa chelete e ngata joaloka tšepe e sa hloekang, li lokela ho sebelisoa feela ha matla a tšepe ea tšepe a sa lekana. Ho ntlafatsa chromium plating corrosion resistance, koporo le nickel li lokela ho tšeloa pele ho chromium plating. Le hoja ho roala ha chromium ho ka mamella mocheso o phahameng oa likhato tse 1200 tsa Fahrenheit (650 degrees Celsius), e na le bothata bo tšoanang le ba hydrogen embrittlement joaloka galvanizing.
3. Ho roala silevera le nickel holim'a metsi
Ho roala ka silevera bakeng sa li-fasteners tsa screwe sebetsa joalo ka setlolo se tiileng bakeng sa li-fasteners hammoho le mokhoa oa ho thibela ho bola. Ka lebaka la litšenyehelo, hangata li-screws ha li sebelisoe, 'me ka linako tse ling liboutu tse nyane le tsona li entsoe ka silevera. Le hoja e silafatsa moeeng, silevera e ntse e sebetsa ka likhato tse 1600 tsa Fahrenheit. E le ho sebetsa ka li-fasteners tse phahameng tsa mocheso le ho thibela screw oxidation, batho ba sebelisa ho hanyetsa mocheso o phahameng le litšoaneleho tsa lubricating. Hangata li-fasteners li na le nickel-plated libakeng tse nang le conductivity e phahameng le ho hanyetsa ho bola. Mohlala, theminale e kenang ea betri ea koloi.
4.Screw surface treatmentDacromet
Phekolo ea bokaholimo baDacromet bakeng sa li-fasteners tsa screwha e na hydrogen embrittlement, 'me torque preload e lula e sebetsa hantle haholo. Leha ho le joalo, e silafatsa ka ho teba. Ntle le ho ela hloko litaba tsa chromium le ts'ireletso ea tikoloho, e hlile e loketse ka ho fetisisa bakeng sa li-fasteners tse matla tse nang le litlhoko tse matla tse thibelang kutu.
5. Phosphating ea sefahleho
Le hoja phosphorating e theko e tlaase ho feta galvanizing, e fana ka tšireletso e fokolang khahlanong le kutu.Screw fastenerse lokela ho tlotsoa ka oli ka mor'a phosphating hobane ts'ebetso ea oli e amana haholo le ho hanyetsa kutu ea li-fasteners. Sebelisa oli e tloaelehileng ea antirust ka mor'a phosphating, 'me tlhahlobo ea spray ea letsoai e lokela ho nka lihora tse 10 ho isa ho tse 20 feela. The screw fastener e ka nka lihora tse 72-96 haeba oli e tsoetseng pele ea antirust e sebelisoa, empa litšenyehelo li phahame ka makhetlo a 2-3 ho feta oli ea phosphating. Hobane torque ea bona le matla a ho tiisa pele li na le ts'ebetso e ntle e tsitsitseng, boholo ba li-screw fasteners tsa indasteri li tšoaroa ke phosphating + oiling. E sebelisoa khafetsa moahong oa indasteri hobane e ka khotsofatsa litlhoko tse lebelletsoeng tsa ho tiisa nakong ea ho kopanya likarolo le likarolo. Haholo-holo ha o hokela likarolo tse ling tsa bohlokoa, li-screws tse ling li sebelisa phosphating, e ka thibelang taba ea hydrogen embrittlement. Ka lebaka leo, lebaleng la indasteri, screwwith grade ho feta 10.9 hangata phosphated.
Nako ea poso: Feb-15-2023