Cold heading steel tseem hu ua riveting steel los yog txias saum forging steel, sib sau steel, txias taub hau yog siv nyob rau hauv chav tsev kub nrog ib tug los yog ntau tshaj cuam tshuam loading, dav siv nyob rau hauv zus tau tej cov screws, pins, ceev thiab lwm yam txheem. Cov txheej txheem txias txias tuaj yeem txuag cov ntaub ntawv raw, txo nqi, thiab txhim kho kev ua haujlwm los ntawm kev ua haujlwm txias txias ntawm lub zog tensile, txhim kho kev ua tau zoo, txias taub hau steel yuav tsum muaj kev ua haujlwm txias txias, txo cov impurities xws li S thiab P cov ntsiab lus hauv cov hlau, nruj zoo. steel nto, feem ntau siv cov pa roj carbon zoo steel, yog cov hlau uas muaj cov pa roj carbon steel ntau dua 0.25 feem pua, yuav tsum nqa ntawm spheroidizing annealing kub kho, txhawm rau txhim kho cov khoom txias ntawm cov hlau.
Feem ntau, saum npoo ntawm lub taub hau txias steel hlau ua rau qee qhov tob ntawm cov khawb me me hu ua daim duab. Lub taub hau txias steel hlau tom qab kos duab yog ib qho yooj yim rau tawg tom qab ntsia liaj qhov rooj thiab kev kho cua sov, yog li qhov zoo ntawm cov hlau yuav tsum tau nruj me ntsis tswj nyob rau hauv cov txheej txheem kos duab.
Qhov teeb meem flaring yog tshwm sim los ntawm zawv zawg kev sib txhuam tshwm sim los ntawm lub taub hau txias steel hlau qws cov khoom zawv zawg raws li qhov chaw tuag. Yog li ntawd, qhov teeb meem flaring feem ntau tshwm sim nyob rau hauv txoj hauj lwm ntawm cov khoom hnyav taug kev hauv kev sib sau. Qhov teeb meem ntawm kev kos duab yuav ua rau hnyav hnyav ntawm kev kos duab tuag, uas ua rau muaj kev tsis sib haum xeeb ntawm ntau cov xov hlau tiav.
Cov yam ntxwv cuam tshuam rau cov plaub hau rub muaj xws li raw khoom yam tseem ceeb thiab pwm yam:
1.Raw material factor
Txoj kab uas hla ntawm lub taub hau txias steel hlau qws tau nthuav dav los ntawm 5mm mus rau 40mm mus rau 4.5mm txog 60mm. Txoj kab uas hla ntawm round steel ranges ntawm 20mm mus rau 100mm. Cov khoom siv hlau, txoj kab uas hla ntau, cov pa roj carbon tsawg lossis cov pa nruab nrab, thiab lwm yam. Qhov loj dua qhov tawm los thiab tensile lub zog thiab txoj kab uas hla ntawm cov khoom, qhov ntau dua qhov kev tsim quab yuam thiab zawv zawg kev sib txhuam ntawm lub taub hau txias steel yog xav tau. Yog li ntawd, qhov ntau dua qhov txias taub hau steel hlau yog muaj qhov teeb meem nro. Qhov loj ntawm txoj kab uas hla ntawm lub taub hau txias yog, qhov me me ntawm lub kaum sab xis yog, thiab qhov yooj yim dua nws yog qhov teeb meem kos duab. Thaum lub zog tensile ntau dua 650MPa, txoj kab uas hla ntawm cov ntaub ntawv raw nyob rau hauv thaj tsam ntawm 24mm los yog ntau tshaj, cov duab nrawm nrawm dhau, qhov teeb meem tshwj xeeb yog qhov tseem ceeb.
2.Mould yam
Pwm yam tseem ceeb yog cov khoom siv pwm, pwm hardness, pwm clearance thiab nto tiav. Cov khoom siv tuag nrog zoo toughness (hnav tsis kam) thiab quenching kev ua tau zoo (hardness tus nqi ntawm 59-63HRc) tuaj yeem txo qhov kev puas tsuaj rau cov tuag los ntawm rub cov plaub hau. Feem ntau cov tuam txhab siv cov hlau alloy tuag, kuj tseem siv tau cov hlau hlau ntxig Cr12MoV thiab SKD11. Rau cov ntaub ntawv nrog tensile lub zog ntawm 440MPa, txoj kev ntawm kev txo cov tuag clearance yog feem ntau siv kom tau ib tug zoo huv si saum npoo loj, tab sis qhov teeb meem ntawm kev kos duab kuj yuav aggravated nrog txo qhov tuag clearance. Qhov saum npoo ntawm lub taub hau txias tsis tau ntxuav, lossis cov av ntawm qhov tuag tsis tau ntxuav. Qhov saum npoo ntawm qhov tuag yuav tsim daim ntawv cog lus thaum lub sijhawm rov ua cov txheej txheem, thiab cov ntawv cog lus no ua rau cov duab kos tsis zoo.
Qhov teeb meem ntawm kev kos cov hlau tiav tuaj yeem daws tau los ntawm lub kaum sab xis ntawm rub pwm pwm
Kev xaiv ntawm cov tawv alloy tuag, los yog nrog Cr12MoV thiab SKD11 alloy steel inserts, los xyuas kom meej lub hardness tom qab quenching.
Kev saib xyuas tsis tu ncua ntawm rub thiab rub tuag kom ntseeg tau tias lub ntsej muag du ntawm qhov ua haujlwm ntawm lub qhov sab hauv.
Txheej yog tsim rau ntawm qhov chaw ntawm lub puab qhov chaw ua hauj lwm, xws li TD kev kho mob thiab PVD kev kho mob, los txhim kho lub hardness thiab hnav tsis kam ntawm lub puab qhov chaw ua hauj lwm.
Nyob rau hauv ib lo lus, rau cov teeb meem tshwm sim ntawm tiav lawm silk wool daim duab, peb yuav tsum ua ib txoj hauj lwm zoo ntawm kev tsub zuj zuj thiab cov ntsiab lus, tas li optimize cov txheej txheem ntau lawm thiab txhim kho cov txheej txheem, los xyuas kom meej qhov zoo ntawm cov ntaub pua plag.
