Screws yog ib tsev neeg loj ntawm cov neeg kho tshuab fasteners nrog threaded shafts tsim los screwed rau hauv qhov chaw. Qhov no suav nrog cov ntsia hlau ntoo thiab tus kheej-jacking screws, uas muaj cov shafts nrog cov xov ntse tsim los txiav mating threads ntawm fastening qhov chaw. Nws kuj muaj xws li tshuab screws, uas zoo ib yam li bolts, tab sis lawv tag nrho cov ncej feem ntau yog threaded.
Cov khoom
Kev txheeb xyuas txoj kev thiab kev ceev faj ntawm lub davhlau ya nyob twg
Ntau hom Hex Head Screws
Cage Clamp Terminal Block
Threaded countersunk steel ntsia hlau
Zinc Plated Steel Sealing Screw rau Electric Meter
Nylon PA66 Ntsia Hlau Terminal Block
Combination Screws Advantage
Hpb 59 Brass Terminal Block
Bolts thiab screws qee zaum muab faib raws li lawv lub hom phiaj. Raws li cov ntsiab lus no, lub bolt dhau los ntawm qhov tsis muaj qhov tsis sib xws hauv ib feem thiab tau ruaj ntseg los ntawm cov txiv ntoo, thaum cov ntsia hlau sib txuas nrog lub qhov threaded nyob rau hauv ib qho ntawm cov khoom raug fastened. Hauv kev xyaum, qhov kev txhais no tsis yog siv nruj me ntsis. Lo lus "bolt" feem ntau yog siv rau cov fasteners uas tsis yog tus kheej tapping thiab tsuas yog ib feem ntawm cov ncej yog threaded. Fasteners uas yog tus kheej tapping lossis muaj tag nrho cov ncej threaded feem ntau hu ua screws.
Screws feem ntau cia siab rau kev sib txhuam ntawm cov xov kom nyob ruaj ntseg nruj. Rau tus kheej tapping screws, radial expansion ntawm lub qhov ua rau feem ntau ntawm kev sib txhuam. Rau lub tshuab screws, kev sib txhuam feem ntau yog tshwm sim los ntawm lub zog torque thov rau lub taub hau thiab lub zog axial tsim los ntawm cov nro tom ntej hauv cov ntsia hlau ua ke nrog cov compression ntawm ib feem. Lub tshuab ntsia hlau tuaj yeem hloov pauv lossis ntxiv rau kev tiv thaiv los ntawm kev xoob los ntawm kev siv cov txiv ntoo xauv los yog xov xauv cov nplaum.
Tshuab screws
Tshuab screws muaj ib tug qauv xov ntawm ib tug sib npaug axis thiab yog tsim los rau screwed rau hauv ib tug threaded qhov nyob rau hauv ib feem. Lawv tuaj yeem siv nrog txiv ntseej. Feem ntau hom tshuab ntsia hlau yog hex ntsia hlau, uas zoo ib yam li hex ntsia liaj qhov rooj tab sis tsis muaj shank. Muaj ntau ntau hom tshuab screws rau cov kev siv tshwj xeeb, feem ntau nrog lub taub hau sib txawv:
Countersunk taub hau ntsia hlau: Lub taub hau tapered tsim los ua countersunk kom nws lies flush nrog rau saum npoo ntawm ib feem, nrog a.
Cap taub hau ntsia hlau: Lub taub hau zoo li lub taub hau nrog lub qhov (socket) tsim kom haum rau hauv lub qhov rooj.
Lub taub hau taub hau: domed taub hau screws nrog lub tes tsho
Flat Head Screw: Ib lub teeb ntsia hlau uas yog threaded rau ntawm nws tag nrho sab nrauv thiab tsis muaj lub taub hau, tso cai rau nws yuav tsum tau screwed tag nrho rau hauv ib lub qhov los xauv qhov hauv qab lub qhov.
Allen screws tuaj yeem muaj ntau hom Allen sib txawv. Qhov kev txiav txim ntawm lub taub hau thiab lub qhov (socket) cov duab muab rau hauv lub npe yuav txawv. Qee yam ntawm cov socket feem ntau yog:
Hex socket los yog "Allen wrench"
hla lub taub hau
Thorz
lus mov
Lub tshuab screws raug muab qhab nia raws li lawv lub zog, siv tib lub kaw lus li bolts, nrog rau ob tus lej sib cais los ntawm ib qho chaw. Thawj tus lej yog qhov kawg tensile zog (UTS) hauv MPa muab faib los ntawm 100, thiab tus lej thib ob yog qhov piv ntawm cov khoom muaj zog rau UTS. Cov qhab nia feem ntau yog 5.8, 8.8, thiab 10.9. Piv txwv li, qib 8.8 ntsia hlau muaj UTS ntawm 800 MPa thiab lub zog tawm los ntawm 80% ntawm tus nqi ntawd (640 MPa).
Self-tapping screws (xws li ntoo screws)
Self-tapping screws yog ib lo lus uas feem ntau siv rau cov ntsia hlau uas txiav cov xov hauv cov ntawv hlau, txawm hais tias cov ntsia hlau ntoo thiab cov ntsia hlau yas feem ntau kuj yog tus kheej tapping screws. Cov hom ntawm cov ntsia hlau no feem ntau muaj lub ntsej muag ntse thiab cov xov ntse ntawm cov ncej tapered. Lawv tuaj yeem muaj lub ntsej muag tsis muaj xov, zoo li lub bolt. Cov hom muaj xws li:
ntoo screws
Self-tapping screws
Square Head Screws: Cov no yog cov ntsia hlau loj rau tus kheej nrog lub taub hau hex uas tso cai rau lub zog siab thaum lub sijhawm teeb tsa. Confusingly, qhov no txawv heev los ntawm ib tug carriage bolt, uas yog lub tshuab ntsia hlau nrog ib tug domed taub hau thiab square shank.