Qib 8.8 Dub Oxide Hex Socket Lub Taub Hau Cap Screws-A Technical Overview of Corrosion Protection and Head Design 

2. Qib 8.8 Dub Oxide tiav: Kev tiv thaiv corrosion

2.1 Dub Oxide yog dab tsi?

Dub oxide, tseem hu ua blackening, yog cov tshuaj hloov pauv txheej uas tsim los ntawm kev ua haujlwm ntawm cov hlau ferrous nrog cov tshuaj alkaline oxidizing ntawm qhov kub siab (feem ntau 140 txog 150 degrees Celsius). Tsis zoo li cov txheej txheej electroplated xws li zinc lossis Dacromet, uas tso cov txheej hlau nyias nyias rau saum cov substrate, cov oxide dub hloov cov txheej saum toj kawg nkaus ntawm cov hlau nws tus kheej mus rau hauv cov hlau nplaum (Fe3O4), cov hlau dub oxide ruaj khov. Qhov tshwm sim yog nyias, matte-dub nto uas dhau los ua ib feem ntawm lub fastener es tsis yog ib txheej ntxiv.

2.2 Cov Txheej Txheem Dub Oxide

Cov txheej txheem dub oxide txheej txheem rau Qib 8.8 fasteners suav nrog cov theem hauv qab no:

Degreasing thiab alkaline ntxuav kom tshem tawm cov roj, txiav cov kua dej, thiab cov khoom paug hauv khw.

Acid pickling kom tshem tawm cov nplai los yog lub teeb xeb.

Immersion nyob rau hauv ib tug kub alkaline-oxidizing da dej (kwv yees li 141 degrees Celsius), qhov twg cov magnetite txheej tsim nyob rau hauv 10 mus rau 20 feeb.

Rinsing thiab sealing nrog cov roj tiv thaiv xeb los yog siv quav ciab, uas ntxiv cov oxide txheej nrog hydrophobic barrier.

2.3 Corrosion Resistance yam ntxwv

Ntawm nws tus kheej, cov txheej txheej dub oxide yog nyias (kwv yees li 0.5 txog 1.5 micrometers) thiab ntxeem tau, uas txhais tau hais tias nws tsuas yog muab kev tiv thaiv corrosion tsawg dua piv rau zinc plating lossis kub-dip galvanizing. Txawm li cas los xij, thaum ua ke nrog cov roj ntxiv los tiv thaiv xeb los yog siv quav ciab, cov txheej txheem ua tiav cov tshuaj tsw qab ntsev tsis kam ntawm kwv yees li 24 mus rau 96 teev, nyob ntawm seb qhov sealant zoo. Qhov kev tiv thaiv qib no yog tsim nyog rau sab hauv tsev, kev tswj hwm huab cua, lossis ib puag ncig corrosive me me uas lub fastener tsis raug rau cov dej ncaj qha lossis ntsev tsuag rau lub sijhawm ntev.

2.4 Qhov zoo thiab qhov txwv

1.Xero dimensional hloov: Vim tias cov oxide txheej yog nyob rau hauv 2 micrometers tuab, dub oxide tsis hloov cov xov tolerances. Qib 8.8 fasteners tuav lawv thawj Chav Kawm 6g haum, ua cov txheej txheem zoo rau kev sib dhos qhov tseeb qhov twg xov cuam tshuam yuav tsum zam.

2. Nqi-zoo: Dub oxide yog ib qho ntawm cov kev kho mob uas pheej yig tshaj plaws muaj, pheej yig dua li zinc-nickel plating, Dacromet, lossis stainless hlau lwm yam.

3.Tsis muaj hydrogen embrittlement: Tsis zoo li electroplating, cov txheej txheem dub oxide tsis tsim cov pa roj hydrogen, tshem tawm cov kev pheej hmoo ntawm hydrogen embrittlement. Qhov no yog qhov tseem ceeb rau Qib 8.8 fasteners ua haujlwm ntawm qhov kev ntxhov siab siab.

4.Aesthetic thov: Cov txheej txheem matte-dub tiav muab lub ntsej muag huv, kev tshaj lij uas sib xyaw nrog cov xim tsaus nti thiab txo lub teeb ci.

5.Limitation - Txwv sab nraum zoov corrosion kuj: Dub oxide tsis haum rau sab nraum zoov, dej hiav txwv, lossis ib puag ncig corrosive heev. Rau cov ntawv thov xws li Dacromet, zinc-nickel plating, lossis stainless hlau yuav tsum raug txiav txim siab.

3. Lub taub hau Cylindrical nrog Hex Socket Drive

3.1 Tsim Txheej txheem cej luam

Lub taub hau cylindrical (feem ntau hu ua lub taub hau taub hau taub hau taub hau los yog DIN 912 / ISO 4762 lub taub hau) nta lub tiaj tus cylindrical zoo nrog lub qhov (socket) hexagonal nyob hauv nruab nrab. Lub taub hau txoj kab uas hla feem ntau yog li 1.5 npaug ntawm nominal xov txoj kab uas hla, thiab lub taub hau qhov siab yog kwv yees li 0.6 mus rau 1.0 npaug ntawm txoj kab uas hla shank, nyob ntawm qhov loj. Qhov geometry no muab cov kabmob loj hauv qab lub taub hau thaum ua kom tag nrho cov profile compact thiab qis-profile.

3.2 Qhov zoo ntawm Cylindrical Head Design

Siab clamping quab yuam: Lub taub hau cylindrical muab cov kabmob loj dua qhov chaw ntawm lub tog raj lossis khawm lub taub hau tsim, faib cov clamping load rau thaj tsam dav dua thiab txo qhov kev pheej hmoo ntawm qhov chaw indentation lossis kev puas tsuaj rau lub workpiece.

Compact hneev taw: Vim tias lub taub hau zaum saum npoo es tsis yog countersunk, lub taub hau cylindrical yuav tsum tsuas yog ib qho yooj yim los ntawm lub qhov los yog lub qhov taub. Tsis xav tau kev ua haujlwm countersinking, simplifying manufacturing.

Flush los yog tsa kev teeb tsa: Lub taub hau tuaj yeem ntsia tau rau hauv qhov chaw (yog tias daim ntawv thov tso cai rau lub taub hau tsa) los yog recessed rau hauv lub counterbore rau ib tug tag nrho flush tiav, muab tsim yooj.

Lub ntsej muag huv si: Lub taub hau cylindrical du nthuav qhia qhov zoo nkauj, zoo nkauj zoo nkauj uas nyiam siv hauv tshuab, cuab yeej, thiab khoom siv hluav taws xob.

3.3 Hex Socket Drive Cov txiaj ntsig

Lub qhov (socket) hexagonal (Allen) tsav yog lub ntsiab lus interface ntawm lub qhov (socket head cap) ntsia hlau. Ib qho Allen hex tseem ceeb ( ciaj ntswj) koom nrog rau 6-point recess, kis torque los tsav cov ntsia hlau. Lub tshuab tsav no muaj ntau qhov zoo sib xws ntawm sab nraud hex, Phillips, lossis slotted drives:

Cov kis tau tus mob siab dua: Lub qhov (socket) sab hauv hex tuaj yeem tiv taus ntau dua torque dua li Phillips lossis slotted drives, ua kom muaj kev ruaj ntseg nruj rau cov nqi siab preload xav tau rau Qib 8.8 fasteners (txog 80% ntawm cov ntaub ntawv pov thawj hauv cov pob qij txha tseem ceeb).

Cam-out resistance: Tsis zoo li Phillips tsav uas tsim los rau cam tawm (tso tawm) nyob rau hauv siab torque, lub hex socket tswj tag nrho kev koom tes, txo cov kev pheej hmoo ntawm cov cuab yeej slippage thiab lub taub hau puas.

Tsawg-profile nkag: Lub hex tseem ceeb mus kom ze los ntawm sab saum toj (axial direction), tso cai rau kev teeb tsa hauv qhov chaw kaw qhov twg lub ciaj ntswj tsis tuaj yeem ncav cuag los ntawm sab. Qhov no yog tshwj xeeb tshaj yog muaj nqis nyob rau hauv ntom machinery sib dhos.

Txo qhov kev pheej hmoo ntawm kev tawg: Qhov chaw sib txuas loj ntawm qhov tseem ceeb ntawm hex thiab lub qhov (socket) phab ntsa faib cov kev ntxhov siab sib npaug, txo txoj hauv kev ntawm lub qhov (socket) deformation lossis stripping, txawm tias tom qab rov ua dua thiab tshem tawm mus.

4. Cov ntawv thov ib txwm

Qib 8.8 dub oxide hex socket taub hau hau hau screws yog siv nyob rau hauv ib tug ntau yam ntawm industries qhov twg nruab nrab-siab zog, nyob rau hauv tsev tiv thaiv corrosion, thiab compact los ua ke yuav tsum tau:

Machinery thiab khoom tsim: Cav mounts, gearbox vaj tse, twj tso kua mis sib dhos, thiab structural thav duab sib txuas.

Automotive (cov khoom siv sab hauv thiab tsis raug): Cov rooj sib txoos dashboard, cov rooj zaum thav duab, sab hauv trim brackets, thiab cov khoom hauv qab-hood sheltered los ntawm huab cua ncaj qha.

Tooling thiab fixtures: Pwm puag, jig thiab fixture assemblies, thiab tuag teeb qhov twg leej clamping thiab rov disassembly yog ib txwm muaj.

Cov khoom siv hluav taws xob thiab cov ntaub thaiv npog: Cov khoom siv khib nyiab, cov thawv hluav taws xob sib txuas, thiab cov tswj vaj huam sib luag uas cov xim dub huv si thiab lub taub hau qis dua.

Rooj tog thiab architectural hardware: Modular rooj tog pob qij txha, exhibition stands, thiab sab hauv architectural fittings.

5. Cov lus xaus

Qib 8.8 dub oxide hex socket taub hau hau screws sawv cev rau qhov sib npaug zoo fastener tov uas hais txog ob qhov tseem ceeb engineering xav tau ib txhij. Cov oxide dub tiav muab ib qho nyias, qhov ruaj khov, hydrogen-embrittlement-free corrosion barrier uas yog ob qho tib si kev lag luam thiab pom kev zoo ib yam. Thaum nws qhov kev tiv thaiv corrosion yog txwv piv rau cov txheej txheem zoo li Dacromet lossis zinc-nickel, nws muaj ntau tshaj qhov txaus rau sab hauv tsev thiab me me corrosive ib puag ncig. Lub taub hau cylindrical nrog hex qhov (socket) tsav, lub sijhawm no, xa cov kev sib kis tau zoo tshaj plaws, muaj peev xwm txhim kho kev tsim kho, thiab kev zoo nkauj huv si uas ua rau nws xaiv qhov kev xaiv zoo tshaj plaws rau cov khoom sib dhos uas qhov chaw, kev ntseeg siab, thiab qhov zoo li txhua yam teeb meem. Ua ke, ob qho no ua rau Qib 8.8 dub oxide socket lub taub hau hau ntsia hlau muaj ntau yam, siv tau zoo, thiab muaj kev vam khom rau kev siv dav dav.