Nyob rau hauv daim ntawv hlau stamping, drawbeads yog lub hauv paus tseem ceeb hauv kev tswj cov dej ntws ntawm cov ntawv hlau los ua cov vaj huam sib luag loj.Cov kev tshawb fawb feem ntau tau tsom mus rau ib qho kev tsim cov hlaws dai, uas muab cov kev txwv tsis pub khi;Tsuas yog ob peb txoj kev tshawb fawb tau hais txog ntau yam rub- hlaws lossis lwm yam geometries. "Drawing Weld Bead Constraints in Sheet Metal Drawing Operations," ib tsab xov xwm ntawm ib leeg-pob zeb tsim luam tawm Nov / Dec.STAMPING Journal 2020, piav qhia tias kev khi tuaj yeem nce ntxiv rau qee qhov los ntawm kev nce qhov tob tob ntawm tus txiv neej hlaws thiab ua kom lub vojvoog ntawm cov hlaws taw qhia ntau dua.
Lub sharper vojvoog ua rau kom lub deformation ntawm daim ntawv hlau raws li nws khoov / ncaj nrog txhua kauj ruam, thaum nws ntws los ntawm drawbead.Rau cov ntaub ntawv uas tsis muaj ductility, xws li txhuas alloys thiab advanced high-strength steels, minimizing lub deformation theem ib dabtsi yog khoov / Lub voj voog uas tsis yog dabtsi yog khoov los ntawm kev siv cov hlaws hlaws loj dua tuaj yeem pab tiv thaiv cov ntawv hlau tawg.Raws dua li ua cov radii sharper, qhov kev txwv yuav raug nce ntxiv los ntawm kev nce tus naj npawb ntawm khoov / ncaj cov kauj ruam (saib daim duab 1).
Lub hom phiaj ntawm txoj kev tshawb no yog los qhia txog kev sib xyaw ib leeg-bead / dual-bead tsim thiab txheeb xyuas qhov kev ua tau zoo ntawm qhov kev teeb tsa no raws li nws qhov kev ua tiav ntawm kev sib khi quab yuam.Qhov kev thov ob lub hlaws tsim muaj peb qhov sib txuas ntxiv ntawm kev khoov thiab ncaj, thiab kev sib txhuam ntau dua. tshaj ib tug adjustable hlaws.Qhov no ua rau ib tug siab binding quab yuam rau tib lub hlaws nkag los yog lub peev xwm los txo cov hlaws nkag mus rau txo cov ntawv deformation.
Aluminium AA6014-T4 cov qauv raug kuaj los txiav txim seb qhov nruab nrab ntawm cov hlaws nkag thiab qhov sib txawv ntawm cov nplaum puas cuam tshuam rau kev khi quab yuam.Cov qauv kuaj siv rau txoj kev tshawb no yog 51 ± 0.3 hli dav, 600 hli ntev, thiab 0.902 ± 0.003 hli tuab. Ntxuav thiab ua kom zoo lubricate daim ntawv kuaj thiab ntxig nrog 61AUS Sib Tsoo Roj.Drawbead inserts yog machined los ntawm D2 cuab yeej steel thiab kub kho rau HRC 62.
Daim duab 2 qhia txog cov khoom ntawm tunable ob lub hlaws siv nyob rau hauv txoj kev tshawb no.Lub tib drawbead simulator thiab hydraulic lub tog raj kheej system tau siv nyob rau hauv txoj kev tshawb no tau tham nyob rau hauv tsab xov xwm dhau los, uas nthuav tawm cov txheej txheem tsim nyob rau hauv ntau nthuav dav.Qhov tag nrho drawbead simulator los ua ke yog mounted ntawm lub rooj steel nyob rau hauv tus ncej ntawm Instron tensile kuaj tshuab, thiab adjustable dual-bead inserts yog mounted nyob rau hauv lub drawbead simulator.
Thaum lub sij hawm kev sim, ib tug tas mus li clamping quab yuam ntawm 34.2 kN tau siv los ua kom qhov sib txawv ntawm lub sab sauv thiab sab qis ntawm lub drawbead zoo ib yam thaum daim ntawv raug rub hla lub drawbead.Qhov sib txawv ntawm lub sab sauv thiab qis ntawm drawbead yog ib txwm ntau dua. tshaj lub thickness ntawm daim ntawv, thiab yog kho los ntawm ib tug shim teeb.
Cov txheej txheem xeem zoo ib yam li siv nyob rau hauv qhov kev ntsuam xyuas monotunable hlaws tau piav nyob rau hauv tsab xov xwm dhau los.Siv lub calibrated spacer los tsim qhov xav tau qhov sib txawv ntawm cov hniav thiab siv lub ntsuas ntsuas ntsuas los xyuas qhov tseeb ntawm qhov sib txawv.Lub clamp sab sauv ntawm lub tensile xeem apparatus clamps lub Upper kawg ntawm daim ntawv, thaum lub qis kawg ntawm lub sawb yog clamped ntawm lub inserts.
Cov qauv lej ntawm cov kev sim rub tawm tau tsim los siv Autoform software.Qhov kev pab cuam siv ib qho kev sib koom ua ke los simulate kev ua haujlwm, tso cai yooj yim hloov ntawm cov qauv simulation yam tsis muaj kev cuam tshuam rau lub sij hawm xam.Qhov txheej txheem no yooj yim rau pwm sim thiab qhia tau zoo correlation nrog cov txiaj ntsig kev sim. ntawm tus lej qauv yog muab nyob rau hauv tsab xov xwm dhau los.
Kev sim tau ua los txiav txim siab qhov cuam tshuam ntawm cov hlaws hauv nruab nrab ntawm kev kos cov hlaws kev ua haujlwm.Tested nrog 6mm, 10mm, 13mm center pass nkag thiab tsis muaj chaw hla thaum tswj qhov sib txawv ntawm qhov ntxig thiab lath ntawm 10% ntawm cov qauv kuaj thickness. Peb qhov kev ntsuam xyuas tau ua rau txhua qhov kev teeb tsa geometric kom ntseeg tau tias cov txiaj ntsig zoo ib yam.
Daim duab 3 qhia txog qhov rov ua dua ntawm qhov kev sim ua rau 6 hli hlaws nkag rau hauv peb qhov qauv, nrog qhov nruab nrab tus qauv sib txawv ntawm 0.33% (20 N).
Daim duab 1. Nyob rau hauv ib tug hybrid rub hlaws tsim, adjustable penetration ntawm lub hlaws muab ntau dua restraint.Retracting lub hlaws converts no rub hlaws rau hauv ib txwm ib tug hlaws configuration.
Daim duab 4 piv cov txiaj ntsig kev sim (tsis muaj cov hlaws nruab nrab thiab 6, 10 thiab 13 hli nkag mus) nrog cov txiaj ntsig simulation.Txhua qhov kev sim nkhaus sawv cev rau qhov txhais tau tias ntawm peb qhov kev sim.Nws tuaj yeem pom tau tias muaj kev sib raug zoo ntawm qhov kev sim thiab cov txiaj ntsig simulation. , nrog qhov sib txawv nruab nrab ntawm cov txiaj ntsig ntawm kwv yees li ± 1.8%. Qhov kev ntsuam xyuas tau qhia meej tias kev nce cov hlaws nkag mus rau qhov nce hauv kev sib khi quab yuam.
Tsis tas li ntawd, qhov cuam tshuam ntawm qhov sib txawv ntawm lub zog txwv tau txheeb xyuas rau kev teeb tsa ob lub hlaws ntawm txhuas AA6014-T4 nrog lub nruab nrab hlaws qhov siab ntawm 6 hli.Qhov kev sim no tau ua rau qhov khoob ntawm 5%, 10%, 15%. thiab 20% ntawm cov qauv thickness.Ib qhov sib txawv yog khaws cia ntawm lub flange ntawm qhov ntxig thiab cov qauv.Qhov kev sim thiab simulation tau tshwm sim hauv daim duab 5 qhia tib qhov sib txawv: nce qhov sib txawv yuav ua rau txo qis hauv drawbead restraint.
Kev sib txhuam coefficient ntawm 0.14 tau xaiv los ntawm kev rov qab engineering.Ib tug lej qauv ntawm lub drawbead system yog tom qab ntawd siv los nkag siab txog cov txiaj ntsig ntawm qhov sib txawv ntawm daim ntawv thiab flange rau 10%, 15% thiab 20% sheet hlau thickness gaps.Rau ib 5 % qhov sib txawv, qhov sib txawv ntawm qhov simulated thiab sim tau yog 10.5%;rau qhov sib txawv loj dua, qhov sib txawv me me.Zuag qhia tag nrho, qhov sib txawv ntawm kev simulation thiab kev sim no tuaj yeem raug ntaus nqi los ntawm-thickness shear deformation, uas tej zaum yuav tsis raug ntes los ntawm tus lej qauv hauv lub plhaub formulation.
Cov nyhuv ntawm qhov sib txawv uas tsis muaj lub hauv paus hlaws (ib lub hlaws dav) ntawm kev khi kuj tau tshawb xyuas.Cov txheej txheem kev sim no kuj tau ua rau qhov khoob ntawm 5%, 10%, 15% thiab 20% ntawm daim ntawv thickness.Daim duab 6 piv cov kev sim thiab simulation cov txiaj ntsig, qhia kev sib raug zoo.
Txoj kev tshawb no pom tau hais tias qhov kev taw qhia ntawm cov hlaws hauv nruab nrab tuaj yeem hloov qhov kev sib khi quab yuam los ntawm ntau tshaj 2.Rau qhov txhuas AA6014-T4 billet, ib qho qauv tau pom los txo qhov kev txwv quab yuam thaum lub flange kis tau qhib. tsim tus lej qauv ntawm cov ntawv hlau ntws ntawm qhov chaw drawbead qhia tau hais tias muaj kev sib raug zoo tag nrho nrog cov txiaj ntsig kev sim thiab tuaj yeem ua rau txoj kev sim ua kom yooj yim dua.
Cov kws sau ntawv xav ua tsaug rau Dr. Dajun Zhou ntawm Stellantis rau nws cov lus qhia muaj txiaj ntsig thiab kev sib tham muaj txiaj ntsig ntawm qhov kev tshwm sim.
STAMPING Journal yog tib phau ntawv xov xwm kev lag luam uas tau mob siab rau ua haujlwm rau cov kev xav tau ntawm kev lag luam hlau stamping.Txij li xyoo 1989, cov ntawv tshaj tawm tau nthuav tawm cov thev naus laus zis tshiab, kev lag luam tiam sis, kev coj ua zoo tshaj plaws thiab xov xwm los pab cov kws tshaj lij stamping ua haujlwm zoo dua.
Tam sim no nrog kev nkag mus rau tag nrho cov ntawv digital ntawm FABRICATOR, yooj yim nkag mus rau cov peev txheej tseem ceeb hauv kev lag luam.
Cov ntawv digital ntawm The Tube & Pipe Journal yog tam sim no nkag mus tau yooj yim, muab kev nkag tau yooj yim rau cov khoom lag luam muaj txiaj ntsig.
Txaus siab rau kev nkag mus rau tag nrho cov ntawv luam tawm digital ntawm STAMPING Journal, uas muab cov txheej txheem thev naus laus zis tshiab, kev coj ua zoo tshaj plaws thiab xov xwm kev lag luam rau kev lag luam hlau stamping.
Tam sim no nrog kev nkag mus rau tag nrho cov ntawv digital ntawm Tus Fabricator en Español, yooj yim nkag mus rau cov peev txheej tseem ceeb hauv kev lag luam.
Post lub sij hawm: May-23-2022