Fastener tsim yog tus cwj pwm los ntawm qib siab ntawm standardization, serialization, thiab interchangeability, thiab yog underpinned los ntawm lub teb chaws los yog kev lag luam qauv. Txawm hais tias me me, fasteners tseem ceeb heev rau lub tsheb sib dhos precision, kev ua haujlwm ruaj khov, kev nyab xeeb, thiab kev pabcuam lub neej. Cov khoom siv hauv tsheb feem ntau suav nrog cov ntsia hlau / ntsia hlau, txiv ntseej, tus kheej -tapping screws, ntxhua khaub ncaws, yas txiv ntseej, thiab clips. Cov txheej txheem fastening feem ntau yog siv cov bolts, screws, los yog studs nrog txiv ntseej nyob rau hauv threaded qhov, los yog tus kheej -tapping screws nyob rau hauv pre- tsim qhov.
Nrog kev nce ntawm lub zog tshiab tsheb thiab kev siv ntau ntxiv ntawm -aluminium lub cev, qhov tseem ceeb ntawm cov txheej txheem tshiab thiab fasteners- xws li Flow Drill Screwing (FDS), Resistance Spot Welding (RSW) for aluminium, Self-Piercing Riveting (SPR), thiab dig muag riveting mus ntxiv{3}. Anti-corrosion coating technologies for fasteners are transitioning from traditional electroplating and phosphating methods to various new, eco-friendly, and high-performance coatings such as Dacromet, Geomet, and Delta. Cov khoom siv fastener yuav tsum nruj me ntsis raws li cov cai hais txog kev txwv thiab txwv tsis pub cov khoom hauv tsheb thiab cov khoom siv.
Cov pob qij txha fastened yuav tsum ua tau raws li qhov yuav tsum tau ua haujlwm tseem ceeb, tshwj xeeb kev ntseeg tau thiab kev nyab xeeb. Cov khoom lag luam nrog chav kawm muaj zog ntawm 10.9 lossis siab dua yuav tsum tau kho kom tiv thaiv hydrogen embrittlement. Xov qhov ntev rau ntau yam kev kam rau siab ntawm cov metric threads yuav tsum ua raws li GB / T 15756, thaum lub qhov tsim yuav tsum siv GB / T 152 thiab GB / T 5277. Cov lus qhia tshwj xeeb rau qhov kawg ntawm cov xov sab nraud, nrog rau cov xov khiav- tawm, lub xub pwg nyom, xov undercuts, thiab chamfers 2, yuav tsum los ntawm kev siv GB/T2. counterbored qhov yuav tsum siv GB / T 5227, GB / T 152.4, thiab GB / T 152.3.
Feem ntau txoj kev ntsuas phoo feem ntau poob rau hauv peb pawg: ntsia liaj qhov rooj- thiab - xauv- cov khoom siv ntxhua khaub ncaws, xauv cov txiv ntoo (tag nrho- cov txiv ntoo xauv hlau thiab tsis yog- hlau ntxig rau cov txiv ntseej), thiab xov- xauv. Lub coefficient ntawm kev sib txhuam yog ib qho tseem ceeb parameter thiab ciam teb rau bolted sib koom tsim; Feem ntau muaj xws li 0.09–0.15, 0.10–0.16, thiab 0.12–0.18. Kev siv dav siv los ua ke xws li kev tswj lub zog thiab lub zog torque-angle tswj. Pom zoo qhov tseem ceeb rau bolt / ntsia hlau sib txuas qhov tob, xov tapping qhov tob, thiab qhov tob drilling tuaj yeem pom nyob rau hauv VDI 2230 tus qauv.