Kuphimba pamwamba pa screw ndikofunika mofanana ndi screwr material yokha. Ulusi wa screw umapangidwa kudzera mu kudula kapena kupanga makina, ndipo zokutira pamwamba zimapereka chitetezo chofunikira cha screw shank ndi ulusi.
Kuti izi zitheke, zomangira zimapindula kwambiri kuchokera ku zokutira zamitundu yosiyanasiyana zomwe zimapangidwira pa screw iliyonse kuti zipereke dzimbiri bwino komanso chitetezo chosweka.
Mwachidule, zokutira pamwamba zimayikidwa pa zomangira kuonjezera kukana pamwamba ndi kuteteza wononga kulephera msanga chifukwa dzimbiri kapena kusweka.
Ndiye, ndi njira ziti zomwe zimagwiritsidwa ntchito kwambiri pochiza screw? Zotsatirazi ndizo njira zochizira zowononga kwambiri:
1. Zinc plating
Ambiri pamwamba mankhwala njira kwaScrew ndi electro galvanizing. Sizotsika mtengo zokha, komanso zimakhala ndi maonekedwe okongola. Electroplating imapezeka mumtundu wakuda ndi wankhondo. Komabe, choyipa chimodzi cha electro galvanizing ndikuti magwiridwe ake odana ndi dzimbiri ndiwamba, ndipo amakhala ndi anti-corrosion yotsika kwambiri pazosanjikiza zilizonse (zophimba). Nthawi zambiri, zomangira pambuyo pa galvanizing electro galvanizing akhoza kudutsa ndale mchere kutsitsi mayeso mkati maola 72, ndi wothandizila wapadera kusindikiza amagwiritsidwanso ntchito, kotero kuti mayeso kutsitsi mchere pambuyo electro galvanizing amatha kwa maola oposa 200, koma ndi okwera mtengo kwambiri. , mtengo wake nthawi 5-8 kuposa galvanizing wamba.
2. Chromium plating
Chophimba cha chromium pa zomangira zomangira chimakhala chokhazikika m'malo, sichisintha mtundu kapena kutayika, chimakhala cholimba kwambiri, ndipo sichimva kuvala. Ngakhale zokutira za chromium zimagwiritsidwa ntchito ngati zokutira zokongoletsa pazomangira, sizimagwiritsidwa ntchito kawirikawiri m'mafakitale omwe amafunikira kukana kwa dzimbiri. Chifukwa zomangira zabwino za chrome ndizokwera mtengo ngati zitsulo zosapanga dzimbiri, ziyenera kugwiritsidwa ntchito pokhapokha mphamvu ya chitsulo chosapanga dzimbiri ili yosakwanira. Kuti chromium plating ikhale yolimba kuti isachite dzimbiri, mkuwa ndi faifi tambala ziyenera kukutidwa pamaso pa chromium plating. Ngakhale zokutira za chromium zimatha kupirira kutentha kwa madigiri 1200 Fahrenheit (650 degrees Celsius), zimakumana ndi vuto lomwelo la hydrogen embrittlement monga galvanizing.
3. Kupaka siliva ndi faifi tambala pamwamba
Kuphimba siliva kwa screw fastenersamagwira ntchito ngati mafuta olimba a zomangira komanso ngati njira yopewera dzimbiri. Chifukwa cha mtengo wake, zomangira sizimagwiritsidwa ntchito, ndipo nthawi zina mabawuti ang'onoang'ono amakhalanso ndi siliva. Ngakhale imadetsa mlengalenga, siliva imagwirabe ntchito pa madigiri 1600 Fahrenheit. Pofuna kugwira ntchito zomangira kutentha kwambiri komanso kupewa screw oxidation, anthu amagwiritsa ntchito kukana kwawo kutentha kwambiri komanso kudzoza mafuta. Zomangira nthawi zambiri zimakutidwa ndi faifi tambala pamalo omwe ali ndi ma conductivity apamwamba komanso osachita dzimbiri. Mwachitsanzo, batire yolowera yagalimoto.
4.Screw pamwamba mankhwalaDacromet
The pamwamba mankhwala aDacromet kwa screw fastenersilibe hydrogen embrittlement, ndipo torque preload nthawi zonse amachita bwino kwambiri. Komabe, imayipitsa kwambiri. Popanda kuganizira nkhani za chromium ndi kuteteza chilengedwe, ndiyoyenera kwambiri zomangira zamphamvu zolimba zolimbana ndi dzimbiri.
5. Phosphating pamwamba
Ngakhale phosphorating ndi yotsika mtengo kuposa galvanizing, imapereka chitetezo chochepa ku dzimbiri.Screw fastenersAyenera kuthiridwa mafuta pambuyo pa phosphating chifukwa ntchito yamafuta imakhala yokhudzana kwambiri ndi kukana kwa dzimbiri kwa zomangira. Ikani mafuta a antirust ambiri pambuyo pa phosphating, ndipo kuyesa kwa kupopera kwa mchere kumangotenga maola 10 mpaka 20. Chomangira chomangira chingatenge maola 72-96 ngati mafuta apamwamba a antirust agwiritsidwa ntchito, koma mtengo wake ndi 2-3 kuposa mafuta a phosphating. Chifukwa ma torque awo komanso mphamvu yolimba isanakwane imakhala ndi magwiridwe antchito abwino, zomangira zambiri zamafakitale zimathandizidwa ndi phosphating + oiling. Amagwiritsidwa ntchito nthawi zambiri m'mafakitale chifukwa amatha kukwaniritsa zosowa zomwe zikuyembekezeredwa pakumanga zigawo ndi zigawo. Makamaka polumikiza zigawo zofunika kwambiri, zomangira zina zimagwiritsa ntchito phosphating, zomwe zimatha kuletsanso vuto la hydrogen embrittlement. Zotsatira zake, m'mafakitale, screw with grade yoposa 10.9 amakhala phosphated.
Nthawi yotumiza: Feb-15-2023