Kwi-sheet metal stamping, i-drawbeads yinto ephambili ekulawuleni ukungena kwe-sheet sheet ukwenza iipaneli ezinkulu.Izifundo ezininzi zigxininise kwi-design-bead eyodwa, ebonelela ngokubophelela okulinganiselwe;zizifundo ezimbalwa kuphela ezigqume amaso okutsalwa amaninzi okanye ezinye iijiyometri.” Ukuzoba izithintelo zeWeld Bead kwiSheet Metal Drawing Operations, inqaku elimalunga noyilo lwebead elinye elipapashwe Nov/Dec.STAMPING Journal 2020, icacisa ukuba ukubophelela kunokongezwa kwezinye. ubungakanani ngokwandisa ubunzulu bokungena kwiso eyindoda kunye nokwenza iradiyasi yeso itsolwe ngakumbi.
I-radius ebukhali yandisa i-deformation ye-sheet metal njengoko igoba / iqondisa ngesinyathelo ngasinye, ngelixa lihamba nge-drawbead.Kwizinto eziphathekayo ezine-ductility elinganiselwe, ezifana ne-aluminium alloys kunye ne-high-high-high steels, ukunciphisa izinga lokuguqulwa ngokugoba / umjikelo ongaguqukiyo ngokusebenzisa i-weld bead radii enkulu inokunceda ukukhusela i-sheet metal cracking.Kunokuba wenze ezi radii zibe bukhali, ukuthintela kunokunyuswa ngokunyusa inani lamanyathelo okugoba / okuqondisa (jonga uMfanekiso 1).
Injongo yolu phononongo ibikukwazisa uyilo oluxubileyo lwebead/iliso eliphindwe kabini kunye nokuhlalutya ukusebenza kolu lungelelwaniso ngokwemiqathango yamandla alo okubophelela okufikeleleka. kune-bead enye ehlengahlengiswayo. Oku kubangela amandla aphezulu okubopha ukungeniswa kwe-bead efanayo okanye ukukwazi ukunciphisa ukungena kwe-bead ukunciphisa ukuguqulwa kweshidi.
I-aluminium AA6014-T4 imizekelo yavavanywa ukufumanisa indlela ukungena kwentsimbi yeziko kunye nomsantsa phakathi kwe-adhesive kuchaphazela amandla okubopha. Iisampuli zeshiti ezicocekileyo nezifanelekileyo kunye nokufakwa kunye ne-61AUS yokuSila i-Oil. Ukufakwa kwe-Drawbead kwenziwa ngomatshini ukusuka kwi-D2 isixhobo sentsimbi kunye nobushushu obuphathwayo kwi-HRC 62.
Umzobo we-2 ubonisa amacandelo e-double bead ethanjiswayo esetyenziswe kolu phando.I-simulator efanayo ye-drawbead kunye ne-hydraulic cylinder system isetyenziswe kwisifundo esixutyushwe kwinqaku elidlulileyo, elibonisa ukuyila kwenkqubo ngokubanzi.Indibano yonke ye-drawbead simulator ifakwe kwitafile yentsimbi ngaphakathi kwesakhelo somatshini wokuvavanya i-Instron tensile, kunye nokufakelwa kweentsimbi ezimbini ezilungelelanisiweyo zifakwe kwi-simulator ye-drawbead.
Ngexesha lovavanyo, i-clamping force ye-34.2 kN isetyenziswe ukugcina isithuba phakathi kweendawo eziphezulu kunye nezisezantsi ze-drawbead zihambelana xa iphepha litsalwa phezu kwe-drawbead. kunobungqingqwa beshiti, kwaye ihlengahlengiswa ngeseti yeshim.
Inkqubo yovavanyo iyafana naleyo isetyenziswe kuvavanyo lwe-monotunable bead oluchazwe kwinqaku elidlulileyo.Sebenzisa i-spacer elinganisiweyo ukwenza i-gap efunekayo phakathi kwee-blades kwaye usebenzise i-fealer gauge ukuqinisekisa ukuchaneka kwe-gap.I-clamp ephezulu ye-tensile izixhobo zokuvavanya zibamba isiphelo esiphezulu sephepha, ngelixa isiphelo esisezantsi somtya sibambekile phakathi kwezinto ezifakiweyo.
Iimodeli zamanani zovavanyo lwe-drawbead zaphuhliswa kusetyenziswa isoftware ye-Autoform.Inkqubo isebenzisa indlela yokudibanisa ecacileyo ukulinganisa ukwenza imisebenzi, ivumela ukuguqulwa okulula kwemodeli yokulinganisa ngaphandle kokuchaphazela kakhulu ixesha lokubala.Le nkqubo yenza lula i-mold tryout kwaye ibonisa ulungelelwaniso oluhle kunye neziphumo zovavanyo.Iinkcukacha yemodeli yamanani inikwe kwinqaku elidlulileyo.
Iimvavanyo zenziwa ukufumanisa umphumo wokungena kwentsimbi yeziko kwintsebenzo yenkqubo ye-bead.Ihlolwe nge-6mm, i-10mm, i-13mm yokungena kweziko lokupasa kwaye akukho kudlula kweziko ngelixa igcina i-gap phakathi kofakelo kunye ne-lath kwi-10% ye-specimen yovavanyo. Iimvavanyo ezintathu zenziwa kuqwalaselo ngalunye lwejometri ukuqinisekisa iziphumo ezihambelanayo.
Umzobo we-3 ubonisa ukuphindaphinda kweziphumo zovavanyo lwe-6 mm yokungena kwi-bead kwiisampuli ezintathu, kunye nokutenxa okuqhelekileyo kwe-0.33% (20 N).
Umzobo 1. Kuyilo oludityanisiweyo lweliso lokutsalwa, ukungena okuhlengahlengiswayo kweso kubonelela ngothintelo olukhulu.
Umzobo we-4 uthelekisa iziphumo zovavanyo (akukho bead yeziko kunye ne-6, i-10 kunye ne-13 mm ukungena) kunye neziphumo zokulinganisa.I-curve nganye yokuhlola imele intsingiselo yezilingo ezintathu.Kungabonwa ukuba kukho ulungelelwaniso oluhle phakathi kovavanyo kunye neziphumo zokulinganisa. , kunye ne-avareji umahluko kwiziphumo malunga ± 1.8%. Iziphumo zovavanyo zibonisa ngokucacileyo ukuba ukunyuka kwamaso kukhokelela ekwandeni kwamandla okubopha.
Ukongezelela, umphumo we-gap kumandla okuthintela uhlalutyelwe kwi-double-bead configuration ye-aluminium AA6014-T4 kunye nokuphakama kwentsimbi yeziko le-6 mm. Le seti yovavanyo lwenziwa kwizithuba ze-5%, i-10%, i-15% kunye ne-20% ye-specimen thickness.I-gap igcinwa phakathi kwe-flange yokufaka kunye ne-specimen.Iziphumo zovavanyo kunye nokulinganisa kwi-Fig. 5 ibonisa indlela efanayo: ukwandisa i-gap kunokukhokelela ekunciphiseni okukhulu kwi-drawbead.
I-coefficient ye-friction ye-0.14 ikhethwe yi-reverse engineering.Imodeli yamanani ye-drawbead system yayisetyenziselwa ukuqonda umphumo we-gap phakathi kwe-sheet kunye ne-flange ye-10%, i-15% kunye ne-20% yezithuba ze-sheet metal thick. I-% gap, umahluko phakathi kweziphumo ezilinganisiweyo kunye nezokulinga yi-10.5%;kwizithuba ezikhulu, umahluko mncinci.Kuko konke, oku kungangqinelani phakathi kokulinganisa kunye novavanyo kunokubalelwa kugutyulo lokutyeba ngokutyeba, olunokuthi lungabanjwa yimodeli yamanani kuqulunqo lweqokobhe.
Isiphumo sesikhewu esingenalo iliso elisembindini (elilinye iliso elibanzi) ekubopheni nalo liye laphandwa. Le seti yemifuniselo yenziwe kwakhona kwizikhewu ze-5%, 10%, 15% kunye ne-20% yobukhulu beshiti.Umfanekiso 6 uthelekisa iziphumo zovavanyo kunye nokulinganisa, ezibonisa ulungelelwaniso oluhle.
Olu phononongo lubonise ukuba ukuqaliswa kwentsimbi yeziko kwakukwazi ukutshintsha amandla okubopha ngento engaphezu kwe-2. Kwi-billet ye-aluminium AA6014-T4, umkhwa wabonwa ukunciphisa amandla okuthintela njengoko i-gap ye-flange ivuliwe. imodeli yamanani ephuhlisiwe yeshiti lesinyithi phakathi komphezulu we-drawbead ibonisa ulungelelwaniso olulungileyo ngokubanzi kunye neziphumo zovavanyo kwaye ngokuqinisekileyo kunokwenza inkqubo yokuzama ibe lula.
Ababhali bangathanda ukubulela uDkt Dajun Zhou waseStellantis ngeengcebiso zakhe ezixabisekileyo kunye nengxoxo eluncedo yeziphumo zeprojekthi.
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Ixesha lokuposa: May-23-2022