Kev txheeb xyuas cov teebmeem ntawm cov ntawv hlau sib txawv (xws li, txhuas, stainless hlau, galvanized ntawv) ntawm ntug folding thiab dov kev ua tau zoo

Cov txheej txheem folding hemming yog cov txheej txheem tseem ceeb ntawm kev tsim tsheb, kev tsim khoom siv hauv tsev thiab kev ua cov tshuab ua kom zoo, uas ncaj qha cuam tshuam rau lub zog ntawm cov qauv, kev sib khi ua haujlwm thiab qhov zoo ntawm cov khoom. Vim tias qhov sib txawv ntawm cov qauv siv lead ua, cov khoom siv kho tshuab thiab cov yam ntxwv ntawm cov khoom siv hlau sib txawv, cov txheej txheem cov yam ntxwv tau pom tseeb hauv cov txheej txheem folding thiab fringing. Kev siv aluminium alloy, stainless hlau thiab galvanized steel ntawv ua piv txwv, kev cuam tshuam ntawm lawv cov khoom siv ntawm cov txheej txheem folding thiab winding yog kev soj ntsuam, thiab cov tswv yim ua kom zoo tau muab tso rau pem hauv ntej raws li cov qauv engineering.
1.Mechanism ntawm cov khoom yam ntxwv cuam tshuam rau Fringe txheej txheem
1.1 Ntug Folding Yam ntxwv ntawm Aluminium Alloy
Aluminium alloys (xws li 6016 series) muaj qhov tshwj xeeb ntug hauv hem vim tsis muaj zog tawm los (kwv yees li 140-180 MPa) thiab siab elongation (Ntau dua lossis sib npaug li 25%). Los ntawm kev txheeb xyuas cov ntsiab lus tseem ceeb, cov khoom ntws hauv thaj chaw deformation yog qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv tensile kev ntxhov siab faib tawm ntau dua li cov pa roj carbon steel hauv cov txheej txheem ntawm kev qhib thiab tig cov npoo ntawm 6016 aluminium, zoo txo ​​qhov kev pheej hmoo ntawm ntug tawg. Piv txwv li, nyob rau hauv cov txheej txheem folding ntawm lub tshuab hluav taws xob lub cav, 6016 aluminium alloy tuaj yeem muaj qhov txwv kev hloov pauv ntawm 0.68, 9.7% siab dua li DC04 steel daim ntawv txwv txoj siav (0.62), tso cai rau ntau dua qhov siab thiab ntau dua geometry.
Txawm li cas los xij, qhov siab tawv hardening Performance index (n nqi) ntawm aluminium alloy (0.2-0.3) ua rau muaj kev rov zoo dua tom qab ntug folding dua hlau. Kev ntsuas cov ntaub ntawv los ntawm lub hau pem hauv ntej ntawm lub tsheb hluav taws xob tau pom tias aluminium ntug quav muaj lub kaum sab xis ntawm 3.2 degrees, 77.8% siab dua tib lub thickness ntawm cov ntawv hlau (1.8 degree). Yuav kom tswj tau qhov rov qab, cov kev ntsuas hauv qab no yuav tsum tau ua:
Ua kom lub flanging fillet radius (pom zoo r Ntau tshaj lossis sib npaug rau 0.5t, t yog daim ntawv tuab).
Optimized tuag coefficient (K=1.05–1.10).
Ua cov calibration theem nrab.
1.2 Stainless Steel Side Fold Challenge
Austenitic stainless hlau (xws li 304) ntsib ob qho kev sib tw loj hauv folding vim lub zog yield Ntau dua los yog sib npaug rau 205 MPa thiab kuj tsis tshua muaj elongation Ntau dua lossis sib npaug ntau dua lossis sib npaug li 40%:
Ntug Cracking: lub zog siab ua rau muaj kev sib zog ua kom muaj zog tangential tensile kev ntxhov siab nyob rau hauv qhov chaw deformation, thiab ntug ntawm lub qhov yog nquag mus rau microcracks thaum tig coefficient tsawg dua 0.58. Cov ntaub ntawv tshawb fawb los ntawm lub tuam txhab khoom siv hauv chav ua noj qhia tau hais tias 304 stainless hlau muaj qhov tawg tawg ntawm 12 12% thaum nws muaj 8 hli qhov siab flanging, thaum 6016 txhuas muaj qhov tawg ntawm tsuas yog 2% nyob rau hauv tib lub sijhawm.
Ua Haujlwm Hardening: Thaum tus nqi n- tus nqi yog 0.3 -0.5, qhov hardness ntawm cov khoom nce los ntawm 30% -50% tom qab ntug folding, zoo heev nce pwm hnav nyob rau hauv tuag forging.
Txhawm rau daws qhov teeb meem ntawm stainless hlau hem, engineering kev coj ua feem ntau suav nrog:
qhov ua ntej- punched qhov taub tau nce 5%–8% los them rau qhov rov qab.
Cov kua nitrogen tau siv los txo cov kev ntxhov siab ntawm cov khoom.
Kev sib txhuam coefficient raug txo los ntawm nano lubricant (μ Tsawg dua lossis sib npaug rau 0.08).
1.3 Txheej txheem yam ntxwv ntawm Galvanized Steel Sheet.
Lub ntug folding zog ntawm galvanized steel ntawv (piv txwv li DC04+ZE) muaj zog cuam tshuam los ntawm txheej:
Galvanized ntawv: Galvanized ntawv yog 5 - 10 μm tuab, nrog muaj zog adhesion rau substrates. Nyob rau hauv tus txheej txheem ntawm ntug folding, zinc txheej deforms nyob rau hauv sync nrog substrates thiab tsis yooj yim rau poob. Txawm li cas los xij, qhov nyuaj ntawm zinc txheej (HV 180-220) yog siab dua li ntawm cov substrate (HV 140-160), uas ua rau muaj kev ntxhov siab ntawm cov kaum ntse ntse thaum cov npoo quav.
Kub-Dip Galvanized Sheet: Nrog rau txheej txheej thickness ntawm 20-40 μm thiab cov yas tsis zoo, cov zinc txheej yog feem ntau ua rau lub network tawg thaum lub flanging qhov siab tshaj 6 hli. Kev ntsuam xyuas los ntawm ib lub tuam txhab khoom siv hauv tsev qhia tau hais tias thaum lub rims tau tig mus txog 8 hli siab, cov txheej thermal galvanized tsuas yog 65 xwb 65% tus nqi, thaum daim ntawv electrogalvanized yog 92 feem pua.
Optimization daws muaj xws li:
Tswj lub nrawm nrawm (tsawg dua lossis sib npaug li 50 mm / s) kom txo cov txheej txheej flaking.
Cov txheej txheem folding yog saws (ua hauv ob kauj ruam).
Nce lub stripping lub kaum sab xis (1℃-2 degree) kom txo tau kev sib txhuam.
2. Cov tshuaj tiv thaiv ntawm cov khoom thaum lub sij hawm ripping
2.1 Hemming Siab thiab Khoom Deformation
Hemming siab yog ib qho tseem ceeb Performance index ntawm cov khoom formability. Raws li Dynaform simulation cov ntaub ntawv:
6016 aluminium alloy ua ntej- yob siab nruab nrab 502 N thiab qhov kawg hemming siab yog 1,327 N.
Lub siab preroll ntawm DC04 steel ntawv nruab nrab yog 860N thiab qhov kawg hemming siab yog 1,852 N.
aluminium alloy yuav tsum tau 40% -42% qis dua dabtsi yog khoov siab dua hlau, feem ntau yog vim nws tsis tshua muaj elastic modulus ntawm elasticity (70GPa vs 70GPa). 210 GPa) thiab cov yas siab -strain ratio (r tus nqi 1.2: 0.8).
2.2 Wave Effect Control
Lub zog ntawm cov khoom siv ncaj qha cuam tshuam rau saum npoo zoo tom qab curling . 6016 aluminium alloy muaj lub zog tawm ntawm 140 MPa thiab yoj qhov siab ntawm 0.15 hli tom qab curling, uas yog 53% qis dua yoj - qhov siab (0.32 hli) ntawm DC04 steel ntawv nyob rau hauv tib lub zog curling. Qhov no ua rau nws zoo tagnrho rau automotive txheej vaj huam sib luag hemming paneling. Qhov roughness ntawm aluminium alloy hemming qhov chaw tuaj yeem ncav cuag 0.8 μm, uas ua tau raws li qhov yuav tsum tau ua ntawm A{10}}Class nto ntawm siab- kawg qauv.
2.3 Indentation Management
Nyob rau hauv cov txheej txheem curling (indentation), tus nqi ntawm cov khoom ntws mus rau hauv lub flange yuav tsum nruj me ntsis tswj . 6016 aluminium alloy indentation yog 15% -20% loj dua steel phaj indentation. Yog tias cov txheej txheem tsis raug tswj xyuas kom raug, lawv yuav ua rau:
Tsis tiav hemming (clearance> 0.1 mm).
Ntug kev nyuaj siab concentration (ua rau qaug zog tawg).
Lub tuam txhab tsheb tswj indentations rau hauv 0.3 hli los ntawm:
segmented siab tswj (pib siab txo los ntawm 30%) yog siv rau precurling.
Ua kom qhov ntev ntawm kev nyob (los ntawm 2 mus rau 4 ss) thaum kawg hemming.
Optimize tuag clearance (1.1t vs.
3. Kev xyaum ua engineering ntawm kev xaiv cov khoom siv thiab kev ua kom zoo
3.1 Case Study: Automotive Body Panels
Lub tsheb tshiab pem hauv ntej npog sab nrauv phaj siv 6016 txhuas cov khoom siv los hloov cov khoom siv hlau, paub txog kev txhim kho zoo los ntawm cov txheej txheem hauv qab no:
Cov khoom siv Pretreatment: T4 kev kho cua sov (kev kho kev daws teeb meem + ntuj laus) ua rau muaj kev tswj hwm ntawm 160 MPa thiab nce elongation mus rau 28%.
Tuag Tsim: Txo kev sib txhuam thiab txuas ntxiv ntawm kev tuag ntawm 50,000 txog 200,000 lub lis piam nrog DLC ​​txheej (hardness HV2500).
Txheej Txheem Saib Xyuas: Nruab lub ntsuas siab (qhov tseeb ± 1 N), kho lub zog curling nyob rau lub sijhawm thiab tswj yoj qhov siab hauv ± 0.05 hli.
3.2 Case Study: Stainless Hlau Inner Liner ntawm Cov Khoom Siv Hauv Tsev
Lub siab- kawg lub tub yees hauv ob sab phlu, ua los ntawm 304 stainless hlau, tuaj yeem daws qhov teeb meem ntawm lub tub yees ntug tawg los ntawm:
Lubrication Upgrade: Cov kev sib txhuam coefficient yog txo los ntawm 0.2 mus rau 0.06 siv graphene -muaj nano-lube.
Kev txhim kho txheej txheem: siv ``pre-stamping → cryogenic folding → annealing kev kho mob "peb- cov txheej txheem kom nce ntug qhov siab ntawm 6 hli mus rau 10 hli.
Tuag optimization: nce lub flanging radius punch fillet ntawm 0.3t mus rau 0.5t thiab txo tus nqi tawg ntawm 8% mus rau 0.5%.
3.3 Case study: Galvanized Steel Sheet for Building Structures
Nyob rau hauv cov hlau qauv engineering ntawm kub-dip galvanized ntawv los ua cov vuas vov tsev, zinc txheej txheej txheej txheej txheej txheej txheem ntawm phab ntsa folding yog daws los ntawm cov kev ntsuas hauv qab no:
Kev tswj txheej txheej: Txo cov txheej thickness ntawm 30 microns mus rau 20 microns kom sib npaug corrosion kuj thiab shaping.
Cov Txheej Txheem Txheej Txheem: Txo qhov nrawm ntawm 80mm / s mus rau 40mm / s thiab nce lub sijhawm nyob ntawm 1s mus rau 3 s.
Tom qab-kev kho mob: Kev txhaj tshuaj pellets ntxiv (Almen siv 0.15A) kom tshem tawm cov kev ntxhov siab uas nyob ntawm ntug folding.
4. Txoj Kev Loj Hlob yav tom ntej Trends and challenges
Qhov kev thov nce ntxiv rau lub teeb yuag aluminium alloys (xws li 7075 series) thiab qib siab siab -lub zog steel (xws li DP980) tau ua rau muaj kev siv ntau ntxiv, ua rau muaj teeb meem tshiab rau hem thiab curling txheej txheem:
Siab - zog aluminium alloys: yield zog ntau tshaj 500 MPa yuav tsum tau txhim kho cov thermal molding txheej txheem (150-250 degree) kom txo tau deformation kuj.
Thib peb-Tsim Siab-Strength Steels: tsuas yog 10%–15%, yuav tsum tau ua hydraulic ua ke nrog cov txheej txheem cua sov hauv zos.
Composites: Cov teeb meem kev sib txuas ntawm cov khoom sib txawv ntawm cov ntaub ntawv sib txawv yuav tsum tau daws nyob rau hauv sab fold ntawm steel -aluminium composite phaj.
Xaus:
Cov ntawv hlau sib txawv sib txawv heev hauv cov txheej txheem ntawm folding thiab edging: aluminium alloy yog cov khoom siv zoo tshaj plaws rau cov phaj sab nraud vim tsis muaj zog tawm los thiab siab elongation, tab sis yuav tsum nruj tswj ntawm bounce thiab indentation; stainless hlau xav tau lubrication hloov khoom dua tshiab thiab cov txheej txheem tshiab los daws qhov tawg; galvanized steel ntawv yuav tsum sib npaug ntawm txheej thickness thiab formability. Nyob rau hauv lub neej yav tom ntej, nrog rau kev loj hlob ntawm cov ntaub ntawv science thiab tsim technology, folding thiab curling txheej txheem ntawm multi- khoom hybrid tsheb lub cev yuav dhau los ua lub ntsiab lus kub, uas yuav tsum tau muaj kev sib koom tes innovation nyob rau hauv cov khoom tsim, pwm optimization thiab cov txheej txheem tswj.