Tam sim no fastener manufacturing encompasses rau cov txheej txheem tseem ceeb, txhua tus tsim nrog cov ntaub ntawv tshwj xeeb, kev ua tau zoo, thiab cov nqi xav tau hauv siab:
Txias taub hau txheej txheem
Lub taub hau txias yog txoj kev tsim ntau tshaj plaws hauv kev tsim khoom fastener. Nws koom nrog kev siv siab -siab tuag rau extrude hlau hlau (xws li carbon steel, stainless hlau, los yog aluminium alloy) ntawm chav tsev kub rau hauv cov duab yooj yim xws li bolts thiab txiv ntseej. Qhov tseem ceeb ntawm cov txheej txheem no yog kev ua haujlwm siab thiab kev siv cov khoom siv zoo tshaj; ib qho kev sib sau ua haujlwm tuaj yeem txo qhov kev xav tau rau kev ua haujlwm tom ntej (txiav) los ntawm 30% -50%, thaum ua tiav qhov ntsuas qhov tseeb hauv ± 0.05mm. Cov ntawv thov ib txwm suav nrog lub tsheb cav bolts thiab siab - lub zog siv ceev- cov khoom uas xav tau lub zog tshwj xeeb thiab sib xws. Cov ntsiab lus tseem ceeb xws li:
- Tuag Tsim: Optimizing tuag kab noj hniav cov ces kaum raws li cov khoom ductility los tiv thaiv cracking;
- Lubrication: Siv graphite lossis dej-raws li lubricants los txo cov coefficient ntawm kev sib txhuam thiab ua kom ntev lub neej;
- Annealing: Ua spheroidizing annealing tom qab txias taub hau los txo cov kev ntxhov siab sab hauv thiab txhim kho kev ua haujlwm rau kev ua haujlwm tom ntej.
Kub Forging txheej txheem
Rau qhov loj - nplai lossis siab - lub zog fasteners (xws li cua turbine ntauwd bolts thiab choj txuas), cov txheej txheem kub forging muaj cua sov cov hlau saum nws qhov kub thiab txias (feem ntau 800-1200 degree) thiab siv lub zog ntawm forging xovxwm los ua kom cov yas deformation. Cov txiaj ntsig tseem ceeb suav nrog kev muaj peev xwm tsim cov ntoo ntoo nyuaj- cov duab ntu thiab ua tiav cov khoom siv siab, ua rau lub zog tensile 15% -20% siab dua qhov txias- taub hau. Cov ntsiab lus tseem ceeb ntawm kev tswj hwm muaj xws li:
- Kev tswj qhov kub thiab txias: Kev tswj xyuas nruj ntawm cov cua kub thiab tuav lub sij hawm yuav tsum tau tiv thaiv kom tsis txhob muaj oxide ntau dhau los yog cov nplej coarsening;
- Forging ratio: Tag nrho cov deformation piv ntawm Ntau dua lossis sib npaug rau 3 feem ntau yuav tsum tau ua kom ntseeg tau tias cov hlau tsis tas li;
- Tom qab- ua tiav: Kev kho hardness ntawm normalizing lossis quenching thiab tempering yog tsim nyog kom tau raws li tus qauv HRC 28–38 ntau yam.
Txoj kev tig
Txawm hais tias tsis tshua muaj txiaj ntsig zoo dua li lub taub hau txias, cov txheej txheem tig tseem yog qhov tseem ceeb rau kev tsim cov khoom tshwj xeeb zoo li tus fasteners (xws li tsis yog -tus qauv bolts thiab drilled pins). Cov txheej txheem suav nrog tig lub workpiece ntawm CNC tshuab dhos thiab siv cov cuab yeej txiav kom tshem tawm cov khoom ntau dhau. Cov yam ntxwv tseem ceeb muaj xws li:
- High precision: Ua tiav IT5-IT7 qib kam rau ua, ua rau nws tsim nyog rau kev ntsuas ntsuas qhov sib txuas;
- Cov khoom siv dav dav: Muaj peev xwm ua cov ntaub ntawv uas nyuaj rau tsim los ntawm cov lus txias, xws li tooj liab thiab titanium alloys;
Stamping txheej txheem
Feem ntau yog siv los tsim cov fasteners xws li ntxhua khaub ncaws thiab lub caij nplooj ntoos hlav ntxhua khaub ncaws, cov txheej txheem no siv lub zog xovxwm los tsav qhov tuag uas ua haujlwm xws li blanking thiab khoov ntawm cov ntawv hlau. Nws cov txiaj ntsig tseem ceeb yog siab -kev tsim khoom nrawm (muaj peev xwm ntau pua qhov chaw hauv ib feeb) thiab tus nqi qis; Txawm li cas los xij, cov hauv qab no yuav tsum tau saib xyuas:
- Tuag Hnav: Punches thiab tuag yuav tsum tau hloov ib ntus txhawm rau tiv thaiv cov burrs ntau dhau;
- Cov Khoom Xaiv: Tsawg- cov ntawv carbon steel nrog cov ductility zoo, xws li Q235 lossis SPCC, nyiam dua;
- Kev Kho Ntog: Tshaj tawm -stamping kev kho mob- xws li electroplating lossis blackening - yog qhov tsim nyog los tiv thaiv xeb thiab xeb.
Xov Rolling txheej txheem
Siv rau threading bolts thiab screws, xov dov txheej txheem cov ntaub ntawv threads ntawm lub workpiece nto los ntawm kev sib hloov compression ntawm ob los yog peb dov tuag. Piv rau xov txiav, nws qhov zoo muaj xws li:
- Ua kom muaj zog ntxiv: Kev ua haujlwm txias txias ua rau lub zog shear ntawm cov xov los ntawm 20% -30%;
- Nto Zoo: Xov nto roughness tuaj yeem ncav cuag Ra 0.8 μm, txo qis kev sib txhuam;
- Cov Khoom Txiaj Ntsig: Tsis muaj chips raug tsim, ua rau kev siv cov khoom mus txog 100%.
Cov txheej txheem kho saum npoo
Kev tiv thaiv corrosion thiab zoo nkauj zoo ntawm fasteners nyob ntawm kev kho deg; cov txheej txheem uas muaj xws li:
- Electro-galvanizing: Tus nqi qis, tsim nyog rau qhov chaw nyob sab hauv tsev, nrog cov tuab tuab ntawm 5-12 μm;
- Dacromet : Tsis muaj kev pheej hmoo ntawm hydrogen embrittlement, tiv taus 500-1,000 teev ntawm kev ntsuas ntsev ntsev, thiab feem ntau yog siv rau cov khoom siv hauv tsheb;
- Zinc diffusion txheej: Tsim cov zinc- hlau alloy txheej ntawm steel nto ntawm diffusion, muab 3-5 npaug ntawm corrosion kuj ntawm electro-galvanizing;
- Txau: Xws li polyester hmoov txheej, siv rau architectural decorative screws los muab ntau yam xim xaiv.