1.Dab tsi yog qhov ua rau tawg ntawm qhov chaw flange?
Qhov chaw: Flange feem ntawm ntug ntawm ib feem los yog hauv qab ntawm qhov khoob khoob.
Yam ntxwv: Cracks feem ntau tshwm ncig los yog radially.
Tej Yam Ua Tau:
Ntau dhau Blank Holder Force: Kev siab dhau ntawm lub qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Khoom siv Anisotropy (pob ntseg taw qhia): Txias-rolled coils nthuav qhia anisotropy tseem ceeb (xws li, qhov sib txawv loj hauv plasticity hauv 45℃lossis 90℃kev taw qhia), ua rau cov khoom tsis txaus hauv qee cov lus qhia.
Tsis txaus Die Corner Radius: Ib qho me me dhau ntawm kaum lub vojvoog ntawm qhov tuag lossis qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Lubrication tsis zoo: Localized rupture ntawm cov zaj duab xis lubricating ua rau cov nplaum hnav, ua rau muaj zog tensile concentration.
2.Dab tsi yog qhov ua rau ntawm phab ntsa tawg?
Qhov chaw: Nyob rau ntawm phab ntsa ncaj los yog sloping ntawm ib feem, feem ntau yog parallel mus rau stamping kev taw qhia.
Cov yam ntxwv: Cov kab nrib pleb feem ntau yog qhov ntev, thiab hauv qhov xwm txheej hnyav, lawv nkag mus rau tag nrho cov phab ntsa.
Tej Yam Ua Tau:
Cov Khoom Siv Tsis Txaus Plasticity (Low Elongation): Qhov no yog qhov tseem ceeb tshaj plaws. Lub elongation los yog ua hauj lwm hardening Performance index (n-tus nqi) ntawm txias- dov kauj yog tsawg dhau los tiv thaiv tensile deformation ntawm qhov chaw no.
Microstructural Defects: Cov qauv banded hnyav lossis coarse carbides muaj nyob hauv. Thaum lub sij hawm deformation, qhov sib cuam tshuam ntawm cov carbides thiab cov matrix dhau los ua qhov pib tawg.
Tshaj Thinning Rate: Lub thinning npaum li cas ntawm qhov chaw no tshaj qhov tsim txwv (piv txwv li, tus nqi thinning tshaj qhov seem txo tus nqi sib xws rau cov khoom siv lub zog tensile kawg).
Kev laus embrittlement: Cov khaub thuas- dov coil tau khaws cia ntev dhau lawm (lossis tau ntsib qhov kub tsis zoo), ua rau muaj kev laus zuj zus thiab txo qis hauv plasticity.
3.Dab tsi yog vim li cas rau cov kab nrib pleb ntawm lub kaum sab xis hauv qab?
Qhov chaw: Ntawm qhov hloov pauv fillet ntawm lub hauv qab saum npoo thiab sidewall ntawm ib feem.
Yam ntxwv: Qhov tawg yog arc- zoo li tus thiab feem ntau tshwm sim nyob rau hauv qhov tseem ceeb tshaj plaws tensile cheeb tsam.
Tej Yam Ua Tau:
Tsis txaus tus txheeb ze thickness: Qhov piv ntawm cov khoom thickness (t) rau workpiece txoj kab uas hla (d) yog me me heev (t / d tus nqi yog tsawg dhau), uas ua rau tsis zoo tsis kam mus rau instability ntawm lub fillet.
Tsis txaus punch fillet vojvoog: Lub vojvoog fillet (Rp) yog me dua qhov tsawg kawg nkaus tso cai khoov vojvoog ntawm cov khoom, ua rau muaj kev ntxhov siab.
Biaxial tensile stress state: Cov khoom yog ib txhij raug rau radial thiab tangential tensile stresses ntawm qhov chaw no. Yog tias qhov sib piv ntawm cov khoom siv zog ntau dhau, nws yuav ncav cuag qhov kev txwv tsis pub tawg.
4.Dab tsi yog qhov ua tau ntawm cov kab nrib pleb ntawm lub hauv paus ntawm tus ntoo khaub lig- zoo li lub zog los yog lub pob?
Qhov chaw: Ntawm lub hauv paus los yog ntug ntawm ib qho chaw sib sau ua ke (xws li lub nraub qaum, pob, lossis daim ntawv).
Yam ntxwv: Cov kab nrib pleb txuas mus raws lub ces kaum los yog ntug ntawm lub qhov rooj txhawb nqa.
Tej Yam Ua Tau:
Combined Bending thiab Tension: Thaum lub sij hawm zoo blanking los yog tsim, cov khoom ntawm qhov chaw no muaj kev sib xyaw ua ke shear thiab tensile stress.
Shear Surface Microcracks: Nyob rau hauv qhov zoo ntawm qhov tsis zoo, qhov tsis tsim nyog blanking clearance los yog tsis txaus siab los ntawm V- iav tej zaum yuav ua rau micro- kua muag (tuag bands loj heev) ntawm lub shear nto, uas yog ces nthuav thaum lub sij hawm tom ntej.
Low Material Hardening Index: Cov khoom siv tsis tuaj yeem cuam tshuam kev ntxhov siab los ntawm kev ua haujlwm tawv tom qab hnyav deformation.
5.Yuav ua li cas txheeb xyuas cov khoom tseem ceeb ntawm cov khoom txias-khoov coils (rau zoo stamping)?
Tsis txaus Spheroidization tus nqi:
Phenomenon: Tsis txaus spheroidization annealing ntawm txias -rolled coils tshwm sim nyob rau hauv lub xub ntiag ntawm lamellar pearlite.
Yog vim li cas: Nyob rau hauv stamping kev nyuaj siab, lamellar carbides ua zoo li cov hniav, txiav los ntawm matrix thiab yooj yim ua rau sidewall los yog ces kaum tawg.
Deg Defects (Decarburized / Carburized Txheej):
Decarburization: Nto decarburization txo lub zog saum npoo, ua rau microcracks (crazing).
Carburization / Oxide Scale Indentation: Tsim cov pob tawv tawv, cuam tshuam cov matrix txuas ntxiv thiab dhau los ua cov ntsiab lus tawg.
Thickness kam rau ua (tsis zoo kam rau ua):
Phenomenon: Cov khoom siv tiag tiag thickness yog nyias dhau (tsis zoo rau qhov siab).
Qhov tshwm sim: Ua rau kom muaj kev tshem tawm loj dua, cov khoom siv tsis ruaj khov, tshwj xeeb tshaj yog thaum lub sij hawm ncab, txo cov load- bearing cross-sectional cheeb tsam thiab nce kev ntxhov siab, ua rau tawg.
Residual Stress:
Phenomenon: Cov kev ntxhov siab tseem ceeb sab hauv yog qhia thaum lub sij hawm dov thiab theem txheej txheem ntawm txias -rolled coils.
Qhov tshwm sim: Lub npoo yuav tiaj tus ua ntej stamping, tab sis tom qab stamping, qhov kev ntxhov siab tso tawm ua ke nrog kev ntxhov siab ua haujlwm tuaj yeem ua rau ncua kev tawg lossis tawg tam sim.