Fasteners yog dav siv nyob rau hauv ntau qhov chaw xws li kev lag luam, kev tsim kho, thiab kev tsim khoom siv tshuab. Kev paub siv cov fasteners no zoo li cas yog ib feem tseem ceeb ntawm kev ua kom zoo thiab kev nyab xeeb ntawm qhov project. Qee qhov kev paub tseem ceeb txog kev siv cov fasteners:
Basic hom thiab cov qauv ntawm fasteners
Bolts (DIN 931, 933): Feem ntau siv rau kev sib txuas ntawm cov tshuab thiab kho cov khoom siv. DIN 931 yog ib nrab threaded ntsia liaj qhov rooj, thaum DIN 933 yog ib tug tag nrho-threaded bolts.
Cov txiv ntseej (DIN 934): Feem ntau siv cov txiv ntoo hexagonal, siv nrog bolts.
Lub tshuab ntxhua khaub ncaws (DIN 125, 9021): Flat washers yog siv los cuam tshuam lub siab ntawm bolts los yog txiv ntseej los tiv thaiv kev puas tsuaj rau qhov chaw fastened.
Self-tapping screws (DIN 7981): Siv rau nyias phaj sib txuas yam tsis muaj kev xyaum ua ntej.
Lub caij nplooj ntoos hlav ntxhua khaub ncaws (DIN 127): Siv los tiv thaiv cov txiv ntseej lossis bolts los ntawm loosening hauv kev vibration lossis dynamic loads.
German txheem fastener cov ntaub ntawv thiab qib
Cov pa roj carbon steel: feem ntau siv rau cov hom phiaj dav dav, cov pa roj carbon tsawg yog tsim rau cov ntawv siv zog tsawg, thiab cov pa roj carbon nruab nrab thiab siab carbon steel yog tsim rau cov ntawv thov uas xav tau lub zog siab.
Alloy steel: high-strength daim ntawv thov scenarios, xws li kev tsim kho, txuas hniav thiab machinery manufacturing. Nws lub zog feem ntau yog qhia hauv qib 8.8, 10.9, thiab 12.9.
Stainless hlau (A2, A4): A2 yog siv rau kev tiv thaiv corrosion-resistant ib puag ncig, thiab A4 yog siv rau kev xav tau ntau dua corrosion (xws li marine thiab tshuaj ib puag ncig).
Galvanizing: Cov pa roj carbon steel los yog alloy steel fasteners yog galvanized (electroplated los yog kub-dip galvanized) los txhim kho lawv cov corrosion kuj thiab yog haum rau sab nraum zoov los yog cov chaw ntub dej.
Cov chaw thov
Kev tsim kho: Fasteners yog siv rau cov qauv steel, formwork sib txuas hauv cov pob zeb nchuav, scaffolding thiab cov cuab yeej siv kho. Siv los txhim kho of elevator rails mus rau lub elevator ncej phab ntsa, kev sib txuas ntawm cov ntsia hlau thiab covrail brackets, thiab cov kev pab cuam fastening ntawm kem brackets thiab cov taag brackets. Cov bolts muaj zog (xws li qib 10.9) thiab kub-dip galvanized bolts feem ntau yog siv.
Kev tsim khoom siv tshuab: Hauv cov cuab yeej siv tshuab, DIN 933 bolts thiab DIN 934 txiv ntseej yog qhov sib xyaw ua ke ntau tshaj plaws, siv nrog lub tshuab ntxhua khaub ncaws thiabcaij nplooj ntoos hlav washerslos xyuas kom meej qhov ruaj khov thiab kav ntev ntawm kev sib txuas.
Automotive kev lag luam: High-strength alloy steel fasteners xws li DIN 912 (hexagon socket bolts) feem ntau siv rau hauv tsheb tsim, tshwj xeeb tshaj yog nyob rau hauv qhov chaw uas yuav tsum tau muaj zog thiab kev co kuj.
Cov khoom siv hauv tsev thiab cov khoom siv hluav taws xob: Cov khoom siv me me xws li DIN 7981 (tus kheej tapping screws) yog siv los kho cov ntawv hlau lossis cov khoom yas yam tsis muaj kev xyaum ua ntej.
Kev xaiv thiab kev teeb tsa raug raug
Strength matching: Xaiv cov qib zog uas tsim nyog raws li daim ntawv thov tshwj xeeb. Piv txwv li, 8.8 qib bolts yog siv rau cov ntawv thov nrog cov kev xav tau ntawm lub zog nruab nrab, thiab qib 12.9 yog siv rau lub zog siab thiab kev sib txuas tseem ceeb.
Kev ntsuas los tiv thaiv xoob: Hauv kev vibration lossis dynamic load ib puag ncig, siv lub caij nplooj ntoos hlav ntxhua khaub ncaws (DIN 127), nylon locking txiv ntseej lossis kua xov lockers los tiv thaiv cov txiv ntoo los ntawm loosening.
Kev tiv thaiv kev tiv thaiv kev tiv thaiv: Hauv qhov chaw sab nraum zoov lossis qhov chaw ntub dej, galvanized lossis stainless hlau fasteners yog nyiam los ua kom ntev kev pab cuam lub neej.
Installation torque tswj
Torque specification: Thaum lub sij hawm installation, lub bolts yuav tsum nruj nruj raws li lub torque specification kom tsis txhob xov puas vim over-tightening los yog kev twb kev txuas tsis ua hauj lwm vim over-loosing.
Kev siv lub torque ciaj ntswj: Hauv kev sib txuas tseem ceeb, yuav tsum siv lub torque ciaj ntswj los xyuas kom meej tias qhov kev thov torque yog nyob rau hauv cov qauv tsim, tshwj xeeb tshaj yog nyob rau hauv lub installation ntawm high-strength bolts.
Kev tu thiab tshuaj xyuas
Kev tshuaj xyuas tsis tu ncua: Tsis tu ncua tshuaj xyuas cov fasteners tseem ceeb, tshwj xeeb tshaj yog thaum ua haujlwm hauv kev vibration siab, hnyav load thiab kub ib puag ncig, kom ntseeg tau tias cov fasteners tsis xoob, corroded los yog hnav.
Hloov lub voj voog: Raws li cov khoom siv thiab kev siv ib puag ncig ntawm cov fasteners, teem ib lub voj voog hloov tsim nyog kom tsis txhob muaj qhov ua tsis tiav los ntawm kev qaug zog lossis corrosion.
Ua raws li cov qauv thiab cov cai
Ua raws li cov qauv German: Hauv cov haujlwm thoob ntiaj teb, tshwj xeeb tshaj yog cov uas cuam tshuam nrog kev xa tawm lossis kev koom tes thoob ntiaj teb, nws yog ib qho tseem ceeb kom ua raws li cov qauv DIN. Xyuas kom meej tias cov fasteners ua tau raws li cov qauv German sib xws (xws li DIN EN ISO 898-1: Mechanical properties standard for fasteners).
Daim ntawv pov thawj thiab kev soj ntsuam zoo: xyuas kom meej tias cov khoom fasteners tau dhau qhov tsim nyog daim ntawv pov thawj thiab kev soj ntsuam zoo (xws li ISO certification) kom ntseeg tau tias cov khoom zoo raws li qhov yuav tsum tau ua.
Los ntawm kev nkag siab tob thiab tsim nyog thov ntawm German tus qauv fastener paub, kev nyab xeeb, kev ntseeg tau thiab kav ntev ntawm qhov project tuaj yeem txhim kho tau zoo.
Post lub sij hawm: Aug-10-2024