1.Qhov twg txias - dov coil stampings feem ntau tawg? Vim li cas?
Qhov chaw tawg feem ntau yog tsom rau hauv thaj chaw flange, sidewalls (tshwj xeeb tshaj yog nyob ze ntawm qhov punch fillet), thiab hauv qab qhov chaw hloov pauv hauv qab. Qhov no yog vim:
Flange cheeb tsam: Thaum lub sij hawm sib sib zog nqus nqus, nws dais tangential compressive kev nyuaj siab thiab radial tensile kev nyuaj siab. Yog hais tias cov ntaub ntawv plasticity tsis txaus los yog daim ntawv thickness sib txawv loj, cov kab nrib pleb yuav tshwm sim.
Sidewall thiab punch fillet cheeb tsam: Qhov no yog thaj tsam ntawm deformation loj tshaj plaws. Cov khoom siv yuav tsum tiv taus ob qho tib si khoov thiab nro. Yog tias cov khoom siv elongation lossis kev ua haujlwm hauv zos tsis zoo, kev tawg yog qhov yuav tshwm sim ntawm no.
Hauv qab fillet: Ntawm no, cov khoom tiv tauj cov punch, ua rau muaj kev sib txhuam siab thiab qhov hnyav tshaj plaws thinning. Yog tias cov khoom siv lub zog tsis txaus lossis lubrication tsis zoo, qhov tawg hauv qab yuav tshwm sim.
2.Vim li cas cov kab nrib pleb feem ntau tshwm sim ntawm cov phab ntsa ntawm qhov chaw stamped, thiab vim li cas cov kab nrib pleb yog qee zaum ntev?
Tsis txaus Bending: Yog hais tias qhov tuag fillet vojvoog me me dhau lawm, cov khoom yuav muaj kev khoov hnyav thiab ncab raws li nws ntws los ntawm cov fillet, ua rau muaj kev ntxhov siab ntau dhau ntawm qhov chaw sab nrauv, dhau ntawm cov khoom txwv thiab ua rau tawg.
Khoom siv Anisotropy: Thaum lub sij hawm dov, txias -rolled coils tsim kev ntxhib los mos, ua rau cov khoom sib txawv ntawm cov lus qhia sib txawv hauv daim ntawv dav hlau. Thaum cov kev taw qhia stamping tsis phim cov kev taw qhia dov, cov kev taw qhia nrog cov yas qis qis (r- tus nqi) muaj peev xwm deformation tsis zoo thiab muaj qhov cuam tshuam ntev ntawm cov phab ntsa.
Kev ua tau zoo sib txawv ntawm qhov pib thiab qhov kawg ntawm qhov txias txias-Rolled Coils: Yog tias qhov chaw stamped tshwm sim los ntawm qhov pib thiab qhov kawg ntawm qhov txias -rolled coil qhov kev ua tau zoo hloov pauv, nws cov plasticity tsis zoo, ua rau nws yooj yim dua rau kev ua tsis tiav nyob rau hauv qhov chaw sab nrauv uas deformation yog concentrated.
3.Puas yog qhov chaw ntawm qhov tawg ncaj qha cuam tshuam rau qhov kev ua haujlwm hloov pauv ntawm qhov txias -rolled coil nws tus kheej (xws li qhov sib txawv ntawm qhov pib thiab qhov kawg)?
Inhomogeneous zog ua rau strain concentration: Thaum lub sij hawm stamping, lub siab -lub zog, qis-plasticity seem (feem ntau yog qhov pib thiab xaus) thiab qis- zog, siab -plasticity nruab nrab seem deform nyob rau hauv uncoordinated txoj kev. Cov seem yas tsis zoo yuav tsis tuaj yeem deform hauv tandem thiab yuav ncav cuag lawv qhov kev txwv ua ntej, ua qhov pib ntawm kev tawg.
Kev cuam tshuam ntawm qhov chaw xaiv qhov chaw xaiv: Yog tias qhov tawg tshwm sim ntawm qhov chaw ruaj khov, qhov qub ntawm qhov chaw stamped ntawm qhov txias -rolled coil tuaj yeem taug qab. Yog hais tias qhov chaw no sib raug zoo rau qhov txawv txav ntawm qhov kub - dov raw khoom lub coiling kub los yog ib feem ntawm fluctuating txias - dov nro, nws yuav txiav txim tau hais tias cov inhomogeneous khoom ntawm raw khoom coj mus rau lub zos deterioration ntawm formability.
4.Yuav ua li cas peb tuaj yeem txiav txim siab los ntawm qhov chaw thiab cov duab ntawm cov kab nrib pleb seb qhov teeb meem nyob nrog cov khoom siv raw lossis cov txheej txheem stamping?
Crack Morphology:
Cov Khoom Siv Raw: Cov kab nrib pleb feem ntau yog qhov tsis sib xws lossis serrated, nrog lub ntsej muag ncaj nraim, thiab feem ntau nrog cov caj dab tsis tseem ceeb (cov yam ntxwv ntawm cov pob txha tawg). Ntawm ntau qhov chaw stamped los ntawm tib lub kauj, qhov chaw tawg yuav tsis raug kho, tab sis nws ib txwm tshwm sim ntawm qhov sib thooj lub taub hau thiab tus Tsov tus tw nrog kev ua haujlwm tsis zoo.
Cov Txheej Txheem Txheej Txheem: Cov kab nrib pleb feem ntau tsis tu ncua, qhib raws qhov kev taw qhia ruaj khov (xws li, raws li 45 ° lub kaum ntse ntse), nrog kev pom tseeb ntawm caj dab ntawm pob txha pob txha (cov pob txha tawg). Qhov chaw tawg yog zoo ib yam, xws li ib txwm nyob ntawm tib lub kaum sab xis lossis tib qhov chaw sab nrauv.
Qhov chaw faib khoom:
Yog hais tias, nyob rau tib lub steel kauj, tus nqi tawg ntawm lub taub hau stamped qhov chaw yog ntau dua li ntawm nruab nrab, los yog yog hais tias qhov chaw tawg yog concentrated nyob rau hauv thaum pib thiab qhov kawg ntawm kev noj cov kev taw qhia, feem ntau nws muaj peev xwm txiav txim siab tias nws yog vim qhov kev ua tau zoo ntawm lub taub hau thiab tus Tsov tus tw ntawm lub txias - dov kauj.
Yog hais tias qhov chaw tawg heev coincides nrog ib qho hnav taw tes lossis tsis sib npaug ntawm qhov chaw tuav lub zog hauv qhov tuag, nws feem ntau yog txheej txheem lossis qhov teeb meem tuag.
5.Dab tsi yog cov kauj ruam daws teeb meem rau kev tshuaj xyuas qhov chaw ntawm cov kab nrib pleb hauv txias - dov coil stampings?
**Qhov Chaw Sampling:** Ua ntej, sau qhov chaw tshwj xeeb ntawm qhov tawg ntawm qhov kev taw qhia stamping (piv txwv li, nyob deb ntawm ntug billet, ntawm lub vojvoog fillet). Tom qab ntawd, taug qab tus thawj txoj hauj lwm ntawm lub billet ntawm lub txias -rolled coil (lub taub hau, nruab nrab, los yog tus Tsov tus tw).
**Kev Ua Haujlwm Re- kuaj:** Siv cov qauv los ntawm qhov ze ntawm qhov tawg thiab los ntawm qhov chaw ib txwm nyob deb ntawm qhov tawg rau cov cuab yeej cuab tam (yield zog, tensile zog, elongation) thiab metallographic tsom xam. Yog tias qhov elongation ntawm thaj chaw tawg yog qhov qis dua lossis qhov microstructure txawv txav (piv txwv li, ntxhib thiab tsis sib xws), nws qhia tias muaj teeb meem nrog cov khoom siv raw.
**Thickness Comparison:** Ntsuas lub thickness txo tus nqi ntawm thaj tsam tawg. Yog hais tias qhov thinning npaum li cas tshaj cov ntaub ntawv tso cai txwv thiab yog unevenly faib, nws yuav qhia tau hais tias ntau thinning vim lub zos cov khoom tsis zoo.
** Kev Ntsuam Xyuas Fracture: ** Saib xyuas qhov tawg ntawm qhov chaw siv lub tshuab ntsuas hluav taws xob los txiav txim seb nws puas yog pob txha tawg (cov pob txha tawg, feem ntau vim yog cov txheej txheem tsim khoom) lossis cleavage lossis intergranular fracture (mob pob txha, feem ntau vim cov khoom tsis xws luag).
Cov txheej txheem daws teeb meem: Ib txhij tshawb xyuas seb puas muaj pwm tshem tawm, lub zog ntawm lub cev tsis muaj zog, thiab cov txheej txheem lubrication zoo ib yam. Tom qab tshem tawm cov txheej txheem hloov pauv, tom qab ntawd txheeb xyuas lub luag haujlwm ntawm qhov sib txawv ntawm qhov pib thiab qhov kawg ntawm cov khoom siv raw.